Government-Owned Inventions; Availability for Licensing, 46642-46646 [E7-16401]
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of infection. The potential broad
application of these compounds could
address a significant health need for
effective antivirals.
Applications: This technology
provides compositions and methods for
the treatment of viral infection and has
human and veterinary applications.
Advantages: The compounds
described by the current technology are
not necessarily specific for a type of
virus or viral strain like many currently
available antiviral compounds, and
therefore have broad therapeutic
antiviral applications. Further, virions
resistant to damage by antibody and
complement have been shown to be
lysed by compounds of the invention
suggesting antiviral surveillance
independent of a humoral immune
response.
Development Status: Proof of concept
in vitro studies using human cells have
shown antiviral activity with viruses
pseudotyped with envelope proteins
from Ebola, HIV, Marburg and
MoMuLV.
Inventors: Gary Nabel and Jae-Ouk
Kim (VRC/NIAID).
Publication: J-O Kim et al. Lysis of
human immunodeficiency virus type 1
by a specific secreted human
phospholipase A2. J Virol. 2007
Feb;81(3):1444–1450.
Patent Status: PCT Application No.
PCT/US2007/004471 filed 21 Feb 2007
(HHS Reference No. E–013–2006/1–
PCT–01).
Licensing Status: Available for
exclusive or non-exclusive licensing.
Licensing Contact: Susan Ano, Ph.D.;
301/435–5515; AnoS@mail.nih.gov
Design of Multi-Functional RNA
Nanoparticles and Nanotubes
Description of Invention: The
characteristic function of nanoparticles
is their ability to deliver drug across
biological barriers to the target site
while protecting the drugs from the
biological environment until they reach
the target site. The present invention
provides polyvalent RNA
nanostructures comprising RNA I
inverse (RNA Ii) or RNA II inverse (RNA
IIi) like motifs that have multiple
positions available for conjugation of
therapeutic, diagnostic or delivery
agents. The nanoparticles of the
invention do not induce significant
immune response by themselves and are
smaller than currently available
nanoparticles and therefore allow for
increased efficiency of administration.
The nanoparticles of this invention have
the ability to deliver one or more
different therapeutic agents in a single
particle. Further, the RNA nanoparticles
are also capable of self-assembly into
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nanotubes of various shapes which offer
potentially broad uses in medical
implants, gene therapy, nanocircuits,
scaffolds and medical testing.
Applications:
1. Use as diagnostic tool.
2. Use as drug delivery composition to
treat various diseases or conditions.
3. Use in screening or identifying
potential chemotherapeutic agents.
4. Use in riboswitch aptamers,
ribozymes or beacons.
5. Use in nanocircuits, medical
implants, gene therapy, scaffolds and
medical testing.
Market: Broad application in various
fields, such as therapeutics, drug
delivery, diagnostics, provides a wide
market potential.
Development Status: Early stage.
Inventors: Bruce A. Shapiro and
Yaroslava G. Yingling (NCI).
Publication: YG Yingling and BA
Shapiro. Computational Design of an
RNA Hexagonal Nanoring and an RNA
Nanotube. Nano Lett. 2007 Jul 6. Epub
ahead of print,.doi 10.1021/nl070984r.
Patent Status: U.S. Provisional
Application No. 60/810,283 filed 02 Jun
2006 (HHS Reference No. E–233–2006/
0–US–01).
U.S. Provisional Application No. 60/
918,181 filed 14 Mar 2007 (HHS
Reference No. E–233–2006/1–US–01).
Licensing Status: Available for
exclusive and non-exclusive licensing.
Licensing Contact: Robert M. Joynes
J.D., M.S.; 301/594–6565;
joynesr@mail.nih.gov.
Collaborative Research Opportunity:
The National Cancer Institute’s
Nanobiology Program (https://wwwlecb.ncifcrf.gov/bshapiro/) is
seeking statements of capability or
interest from parties interested in
collaborative research to further
develop, evaluate, or commercialize
RNA nanostructures. Please contact
John D. Hewes, Ph.D. at 301–435–3121
or hewesj@mail.nih.gov for more
information.
Methods for Preparing Complex
Multivalent Immunogenic Conjugates
Description of Technology: Claimed in
this application are novel methods for
preparing complex multivalent
immunogenic conjugates and conjugate
vaccines. The multivalent conjugates
and conjugate vaccines are synthesized
by conjugating mixtures of more than
one polysaccharide at a desired ratio of
the component polysaccharides to at
least one carrier protein using hydrazide
chemistry. Because of the high
efficiency of hydrazide chemistry in
conjugation, the polysaccharides are
effectively conjugated to the carrier
protein(s) so that the resulting complex
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synthesized vaccine conjugate products,
without requiring tedious and
complicated purification procedures
such as chromatography and/or
ammonium sulfate precipitation, are
efficacious in inducing antibodies in
mice against each component
polysaccharide. The methods claimed in
this application simplify the preparation
of multivalent conjugate vaccines by
utilizing simultaneous conjugation
reactions in a single reaction mixture or
batch that includes at least two
immunogenic-distinct polysaccharides.
This single-batch simultaneous reaction
eliminates the need for multiple parallel
synthesis processes for each
polysaccharide vaccine conjugate
component as employed in
conventional methods for making
multivalent conjugate vaccines.
Application: Cost effective and
efficient manufacturing of conjugate
vaccines.
Inventors: Che-Hung Robert Lee
(CBER/FDA).
Patent Status: PCT Application No.
PCT/US2007/006627 filed 16 Mar 2007
(HHS Reference No. E–085–2005/0–
PCT–02).
Licensing Status: Available for
exclusive or non-exclusive licensing.
The technology is not available for
licensing in the field of use of
multivalent meningitis vaccines.
Licensing Contact: Peter A. Soukas,
J.D.; 301/435–4646;
soukasp@mail.nih.gov.
Dated: August 13, 2007.
Steven M. Ferguson,
Director, Division of Technology Development
and Transfer, Office of Technology Transfer,
National Institutes of Health.
[FR Doc. E7–16400 Filed 8–20–07; 8:45 am]
BILLING CODE 4140–01–P
DEPARTMENT OF HEALTH AND
HUMAN SERVICES
National Institutes of Health
Government-Owned Inventions;
Availability for Licensing
National Institutes of Health,
Public Health Service, HHS.
ACTION: Notice.
AGENCY:
SUMMARY: The inventions listed below
are owned by an agency of the U.S.
Government and are available for
licensing in the U.S. in accordance with
35 U.S.C. 207 to achieve expeditious
commercialization of results of
federally-funded research and
development. Foreign patent
applications are filed on selected
inventions to extend market coverage
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for companies and may also be available
for licensing.
ADDRESSES: Licensing information and
copies of the U.S. patent applications
listed below may be obtained by writing
to the indicated licensing contact at the
Office of Technology Transfer, National
Institutes of Health, 6011 Executive
Boulevard, Suite 325, Rockville,
Maryland 20852–3804; telephone: 301/
496–7057; fax: 301/402–0220. A signed
Confidential Disclosure Agreement will
be required to receive copies of the
patent applications.
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Methods of Glycosylation and
Bioconjugation
Description of Technology: Eukaryotic
cells express several classes of
oligosaccharides attached to proteins or
lipids. Animal glycans can be N-linked
via beta-GlcNAc to Asn (N-glycans), Olinked via -GalNAc to Ser/Thr (Oglycans), or can connect the carboxyl
end of a protein to a
phosphatidylinositol unit (GPI-anchors)
via a common core glycan structure.
Beta (1,4)-galactosyltransferase I
catalyzes the transfer of galactose from
the donor, UDP-galactose, to an
acceptor, N-acetylglucosamine, to form
a galactose-beta (1,4)-Nacetylglucosamine bond, and allows
galactose to be linked to an Nacetylglucosamine that may itself be
linked to a variety of other molecules.
Examples of these molecules include
other sugars and proteins. The reaction
can be used to make many types of
molecules having great biological
significance. For example, galactosebeta (1,4)-N-acetylglucosamine linkages
are important for many recognition
events that control how cells interact
with each other in the body, and how
cells interact with pathogens. In
addition, numerous other linkages of
this type are also very important for
cellular recognition and binding events
as well as cellular interactions with
pathogens, such as viruses. Therefore,
methods to synthesize these types of
bonds have many applications in
research and medicine to develop
pharmaceutical agents and improved
vaccines that can be used to treat
disease.
The invention provides in vitro
folding method for a polypeptidylalpha-N-acetylgalactosaminyltransferase
(pp-GalNAc-T) that transfers GalNAc to
Ser/Thr residue on a protein. The
application claims that this in vitrofolded recombinant ppGalNAc-T
enzyme transfers modified sugar with a
chemical handle to a specific site in the
designed C-terminal polypeptide tag
fused to a protein. The invention
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provides methods for engineering a
glycoprotein from a biological substrate,
and methods for glycosylating a
biological substrate for use in
glycoconjugation. Also included in the
invention are diagnostic and therapeutic
uses.
Application: Enzymes and methods
are provided that can be used to
promote the chemical linkage of
biologically important molecules that
have previously been difficult to link.
Developmental Status: Enzymes have
been synthesized and characterization
studies have been performed.
Inventors: Pradman Qasba and
Boopathy Ramakrishnan (NCI/SAIC).
Patent Status: U.S. Provisional
Application No. 60/930,294 filed 14
May 2007 (HHS Reference No. E–204–
2007/0–US–01).
Licensing Status: Available for
exclusive or non-exclusive licensing.
Licensing Contact: Peter A. Soukas,
J.D.; 301/435–4646;
soukasp@mail.nih.gov.
Collaborative Research Opportunity:
The National Cancer Institute is seeking
statements of capability or interest from
parties interested in collaborative
research to further develop, evaluate, or
commercialize this technology. Please
contact John D. Hewes, Ph.D. at 301–
435–3121 or hewesj@mail.nih.gov for
more information.
Improved Bacterial Host for Production
of Anthrax Toxin Proteins and
Vaccines: Bacillus anthracis BH450
Description of Invention: Anthrax
toxin has previously been made from
various avirulent strains of Bacillus
anthracis. The inventors have
genetically engineered a new strain of B.
anthracis with improved properties.
The strain, designated BH450, is totally
deficient in the ability to make spores
and to produce a major extracellular
protease designated Peptidase M4. The
genetic lesions introduced are defined,
true deletions, so there is no possibility
of reversion. Inability to make spores
assures that laboratories growing the
strain will not become contaminated
with the very stable anthrax spores.
Inability to make peptidase M4
increases the stability of proteins such
as anthrax toxin that are secreted to the
culture medium.
Applications and Modality: B.
anthracis vaccine/prophylactic and
therapeutic studies.
Market: Research tool useful for
biodefense/therapeutic studies.
Development Status: The technology
is a research tool.
Inventors: Andrei Pomerantsev, Dana
Hsu, Ramakrishnan Sitaraman, Craig
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Galloway, Violetta Kivovich, Stephen
Leppla (NIAID).
Publication: AP Pomerantsev et al.
Genome engineering in Bacillus
anthracis using Cre recombinase. Infect
Immun. 2006 Jan;74(1):682–693.
Patent Status: HHS Reference No. E–
127–2007/0—Research Tool.
Licensing Status: This technology is
not patented. The strain will be
transferred through a Biological
Materials License.
Licensing Contact: Peter A. Soukas,
J.D.; 301/435–4646;
soukasp@mail.nih.gov.
Collaborative Research Opportunity:
The National Institute of Allergy and
Infectious Diseases, Laboratory of
Bacterial Diseases, is seeking statements
of capability or interest from parties
interested in collaborative research to
further develop, evaluate, or
commercialize Bacillus anthracis BH450
strain. Please contact Dr. Andrei P.
Pomerantsev at phone 301–451–9817
and/or e-mail
apomerantsev@niaid.nih.gov for more
information.
Compositions and Methods for
Increasing Recombinant Protein Yields
Through the Modification of Cellular
Properties
Description of Technology: This
technology relates to compositions and
methods for improving the growth
characteristics of cells engineered to
produce biologically active products
such as antibodies or glycosylated
proteins. Featured is a method that uses
gene candidates (e.g., cdkl3, siat7e, or
lama4), or their expressed or inhibited
products in cell lines, such as Human
Embryonic Kidney (including HEK–
293), HeLa, or Chinese Hamster Ovary
(CHO). The gene expression modulates
growth characteristics, such as adhesion
properties, of the cell lines thereby
increasing recombinant protein yields
and reducing product production costs.
Applications: This technology may be
used to improve production of
therapeutic and/or diagnostic
compounds, including therapeutic
proteins or monoclonal antibodies from
mammalian cells. Optimization of
mammalian cells for use as expression
systems in the production of
biologically active products is very
difficult. For certain applications,
anchorage-independent cell lines may
be preferred, whereas for other
applications, a cell line that adheres to
a surface, e.g. is anchorage-dependent,
may be preferable. This technology
provides a method for identifying a gene
whose expression modulates such
cellular adhesion characteristics. This
method thus leads to an increase in the
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expression or yield of polypeptides,
including therapeutic biologicals, such
as antibodies, cytokines, growth factors,
enzymes, immunomodulators,
thrombolytics, glycosylated proteins,
secreted proteins, and DNA sequences
encoding such polypeptides and a
reduction in the associated costs of such
biological products.
Advantages: This technology offers
the ability to improve yields and reduce
the cost associated with the production
of recombinant protein products
through the selection of cell lines
having: altered growth characteristics;
altered adhesion characteristics; altered
rate of proliferation; improvement in
cell density growth; improvement in
recombinant protein expression level.
Market: Biopharmaceuticals,
including recombinant therapeutic
proteins and monoclonal antibodybased products used for in vivo medical
purposes and nucleic acid based
medicinal products now represent
approximately one in every four new
pharmaceuticals on the market. The
market size has been estimated at $33
billion in 2004 and is projected to reach
$70 billion by the end of the decade.
The list of approved biopharmaceuticals
includes recombinant hormones and
growth factors, mAB-based products
and therapeutic enzymes as well as
recombinant vaccines and nucleic acid
based products.
Mammalian cells are widely used
expression systems for the production of
biopharmaceuticals. Human embryo
kidney (including HEK–293) and
Chinese hamster ovary (CHO) are host
cell of choice. The genes identified in
this technology (e.g., cdkl3, sia7e, or
lama4) can be used to modify these
important cell based systems.
This technology is ready for use in
drug/vaccine discovery, production and
development. The technology provides
methods for identification of specific
gene targets useful for altering the
production properties of either existing
cell lines to improve yields or with new
cell lines for the production of
therapeutic and or diagnostic
compounds from mammalian cells.
Companies that are actively seeking
production platforms based on
mammalian cell lines that offer high
efficiency, high throughput systems for
protein production or analysis at lower
cost and ease of scale-up would be
potential licensors of this technology.
Development Status: Late Stage—
Ready for Production.
Inventors: Joseph Shiloach (NIDDK),
Pratik Jaluria (NIDDK).
Related Publication: P. Jaluria et al.
Application of microarrays to identify
and characterize genes involved in
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attachment dependence in HeLa cells.
Metab Eng. 2006 Dec 13, Epub ahead of
print, doi:10.1016/j.ymben.2006.12.001.
Patent Status: U.S. Provisional
Application No. 60/840,381 filed 24
Aug 2006 (HHS Reference No. E–149–
2006/0–US–01).
Licensing Status: Available for
exclusive or non-exclusive licensing.
Licensing Contact: Peter A. Soukas,
J.D.; 301/435–4646;
soukasp@mail.nih.gov.
Collaborative Research Opportunity:
The National Institute of Diabetes and
Digestive and Kidney Diseases,
Biotechnology Core Laboratory, is
seeking parties interested in
collaborative research projects directed
toward the use of this technology with
cells for drug and vaccine production
and development, including growth
optimization, production and product
recovery processes. For more
information, please contact Dr. Joseph
Shiloach, josephs@intra.niddk.nih.gov,
or Rochelle S. Blaustein at
Rochelle.Blaustein@nih.gov.
Methods for Conjugation of
Oligosaccharides or Polysaccharides to
Protein Carriers Through Oxime
Linkages Via 3-Deoxy-D-MannoOctulsonic Acid
Description of Technology: This
technology comprises new methods for
the conjugation of O-specific
polysaccharides/oligosaccharides (OSP/OS) derived from bacterial
lipooligosaccharides/
lipopolysaccharides (LOS/LPS), after
their cleavage from Lipid A, to carrier
proteins, to serve as potential vaccines.
Conjugation is performed between the
carbonyl group on the terminal reducing
end of the saccharide and the aminooxy
group of a bifunctional linker bound
further to the protein.
The inventors have carried out the
reaction under mild conditions and in a
short time resulting in binding 3-deoxyD-manno-octulosonic acid (KDO) on the
saccharide to the protein. These
conjugates preserve the external nonreducing end of the saccharide, are
recognized by antisera, and induce
immune responses in mice to both
conjugate components (i.e., the OS and
the associated carrier protein).
Application: Cost effective and
efficient manufacturing of conjugate
vaccines.
Inventors: Joanna Kubler-Kielb
(NICHD), Vince Pozsgay (NICHD), Gil
Ben-Menachem (NICHD), Rachel
Schneerson (NICHD), et al.
Patent Status: U.S. Provisional
Application No. 60/832,448 filed 21 Jul
2006 (HHS Reference No. E–183–2005/
0–US–01); PCT Patent Application filed
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21 Jul 2007 (HHS Reference No. E–183–
2005/0–PCT–02).
Licensing Status: Available for
exclusive or non-exclusive licensing.
Licensing Contact: Peter A. Soukas,
J.D.; 301/435–4646;
soukasp@mail.nih.gov.
In Vitro Model for Hepatitis C Virion
Production
Description of Technology: This
invention provides an in vitro hepatitis
C virus (HCV) replication system that is
capable of producing viral particles in a
culture medium. Hepatitis C is a major
public health problem, the development
of therapeutics for which has been
hampered by a lack of a robust model
system to study the complete viral life
cycle. This invention provides a new
model system for the complete
replication cycle of hepatitis C virus and
virion production, assembly and release.
The model is useful for screening
antiviral agents against HCV.
A full length HCV construct, CG1b of
genotype 1b which is known to be
infectious, was placed between two
ribozymes designed to generate the
exact 5′ and 3′ ends of HCV when
cleaved. Using this system, HCV
proteins and positive and negative RNA
strands have been shown to reproduce
intracellularly, and viral particles that
resemble authentic HCV virions are
produced and secreted into the culture
medium.
The patent application includes
claims directed toward the following: A
construct comprising specific nucleic
acid sequences including HCV genotype
1b, genotype 1a, genotype 2a or
potentially other genotypes; a method
for identifying a cell line that is
permissive for infection with HCV; a
method for propagating HCV in vitro; a
method for screening agents capable of
modulating HCV replication or activity;
a method for testing the level of HCV
replication or activity; a HCV vaccine
comprising HCV virus particles.
Applications: The model offers a
novel method for investigating the
entire HCV life cycle including
replication and pathogenesis and is
useful for high-throughput antiviral
screening. This technique may also be
useful for making infectious particles
that are useful in the production of HCV
vaccines.
Advantages: This system provides a
new, stable and efficient cell culture
model to further study the life cycle and
biology of HCV, and to test potential
therapeutic targets for hepatitis C. This
model has also been used to generate in
cell culture HCV strains infectious for
chimpanzees, the only experimental
animal susceptible to infection with the
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hepatitis C virus, a critical step in the
development of new vaccines for
Hepatitis C.
Market: Hepatitis C virus (HCV)
chronically infects approximately 200
million people worldwide and increases
the risk of developing cirrhosis and
hepatocellular carcinoma. This
technology would be useful for studying
the HCV life cycle, screening for
therapeutic agents against multiple HCV
strains, including Genotype 1a, 1b and
2a, and the development of HCV
vaccines. HCV genotypes 1 and 2 are the
major genotypes with worldwide
distribution; they are known to be
associated with different clinical
profiles and therapeutic responses.
Hence, the model may be used to screen
for varying levels of effectiveness of
therapeutics against the major HCV
genotypes.
Development Status: This technology
is available for use in diagnostics, drug/
vaccine discovery, production and
development. Current work is directed
toward studies into the HCV life cycle
and replication and the pathogenesis of
HCV screening for antiviral agents
against multiple HCV strains. This
model has been used to generate in cell
culture HCV strains infectious for
chimpanzees, the only experimental
animal susceptible to infection with the
hepatitis C virus, a critical step in the
development of new vaccines for
Hepatitis C. Future work may be
directed toward the use of this system
for development of vaccine candidates
against HCV.
Inventors: T. Jake Liang and Theo
Heller (NIDDK).
Related Publications:
1. Z. Hu et al. Altered proteolysis and
global gene expression in hepatitis B
virus X transgenic mouse liver. J Virol.
2006 Feb;80(3):1405–1413.
2. T. Heller et al. An in vitro model
of hepatitis C virion production. Proc
Natl Acad Sci USA. 2005 Feb
15;102(7):2579–2583.
Patent Status: PCT Application No.
PCT/US2005/035487 filed 30 Sep 2005
(HHS Reference No. E–324–2004/3–
PCT–01), based on: U.S. Provisional
Application No. 60/615,301 filed 30 Sep
2004 (HHS Reference No. E–324–2004/
0–US–01), now abandoned; U.S.
Provisional Application No. 60/642,210
filed 06 Jan 2005 (HHS Reference No. E–
324–2004/1–US–01), now abandoned;
U.S. Provisional Application No. 60/
720,692 filed 26 Sep 2005 (HHS
Reference No. E–324–2004/2–US–01),
now abandoned.
Licensing Status: Available for
exclusive or non-exclusive licensing.
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Licensing Contact: Peter A. Soukas,
J.D.; 301/435–4646;
soukasp@mail.nih.gov.
Collaborative Research Opportunity:
The National Institute of Diabetes and
Digestive and Kidney Diseases, Liver
Diseases Branch, is seeking parties
interested in collaborative research
directed toward molecular strategies for
vaccine and antiviral development, and
animal models of viral hepatitis C.
Please contact Dr. T. Jake Liang at 301–
496–1721, jliang@nih.gov or Rochelle S.
Blaustein at Rochelle.Blaustein@nih.gov
for more information.
Monoclonal Antibodies Against
Orthopoxviruses
Description of Invention: Concerns
that variola (smallpox) virus might be
used as a biological weapon have led to
the recommendation of widespread
vaccination with vaccinia virus. While
vaccination is generally safe and
effective for prevention of smallpox, it
is well documented that various adverse
reactions in individuals have been
caused by vaccination with existing
licensed vaccines. Vaccinia immune
globulin (VIG) prepared from vaccinated
humans has historically been used to
treat adverse reactions arising from
vaccinia immunization. However, VIG
lots may have different potencies and
carry the potential to transmit other
viral agents.
Chimpanzee Fabs against the B5 and
A33 outer extracellular membrane
proteins of vaccinia virus were isolated
and converted into complete mAbs with
human gamma1 heavy chain constant
regions. The two mAbs displayed high
binding affinities to B5 and A33. The
mAbs inhibited the spread of vaccinia
virus as well as variola virus (the
causative agent of smallpox) in vitro,
protected mice from subsequent
intranasal challenge with virulent
vaccinia virus, protected mice when
administered 2 days after challenge, and
provided significantly greater protection
than that afforded by VIG.
Application: Prophylactics or
therapeutics against orthopoxviruses.
Developmental Status: Preclinical
studies have been performed.
Inventors: Zhaochun Chen, Robert
Purcell, Suzanne Emerson, Patricia Earl,
Bernard Moss (NIAID).
Publications:
1. Z. Chen et al. Chimpanzee/human
mAbs to vaccinia virus B5 protein
neutralize vaccinia and smallpox
viruses and protect mice against
vaccinia virus. Proc Natl Acad Sci USA.
2006 Feb 7;103(6):1882–1887. Epub
2006 Jan 25.
2. Z. Chen et al. Characterization of
chimpanzee/human monoclonal
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antibodies to the vaccinia A33
glycoprotein and its variola virus
homolog in vitro and in a vaccinia
mouse protection model. J Virol. 2007
Jun 20; Epub ahead of print, doi
10.1128/JVI.00906–07.
Patent Status: PCT Patent Application
No. PCT/US2006/048832 filed 22 Dec
2006 (HHS Reference No. E–145–2004/
3–PCT–01); PCT Patent Application No.
PCT/US2006/048833 filed 22 Dec 2006
(HHS Reference No. E–145–2004/4–
PCT–01).
Licensing Status: Available for
exclusive or non-exclusive licensing.
Licensing Contact: Peter A. Soukas,
J.D.; 301/435–4646;
soukasp@mail.nih.gov
Collaborative Research Opportunity:
The National Institute of Allergy and
Infectious Diseases, Laboratory of
Infectious Diseases, is seeking
statements of capability or interest from
parties interested in collaborative
research to further develop, evaluate, or
commercialize Chimpanzee/human
neutralizing monoclonal antibodies
against orthopoxviruses. Please contact
Dr. Robert Purcell at 301–496 5090 for
more information.
A Method With Increased Yield for
Production of Polysaccharide-Protein
Conjugate Vaccines Using Hydrazide
Chemistry
Description of Technology: Current
methods for synthesis and
manufacturing of polysaccharideprotein conjugate vaccines employ
conjugation reactions with low
efficiency (about twenty percent). This
means that up to eighty percent of the
added activated polysaccharide (PS) is
lost. In addition, inclusion of a
chromatographic process for
purification of the conjugates from
unconjugated PS is required.
The present invention utilizes the
characteristic chemical property of
hydrazide groups on one reactant to
react with aldehyde groups or cyanate
esters on the other reactant with an
improved conjugate yield of at least
sixty percent. With this conjugation
efficiency the leftover unconjugated
protein and polysaccharide would not
need to be removed and thus the
purification process of the conjugate
product can be limited to diafiltration to
remove the by-products of small
molecules. The new conjugation
reaction can be carried out within one
or two days with reactant
concentrations between 1 and 25 mg/mL
at PS/protein ratios from 1:2 to 3:1, at
temperatures between 4 and 40 degrees
Centigrade, and in a pH range of 5.5 to
7.4, optimal conditions varying from PS
to PS.
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Application: Cost effective and
efficient manufacturing of conjugate
vaccines.
Inventors: Che-Hung Robert Lee and
Carl E. Frasch (CBER/FDA).
Patent Status: U.S. Patent Application
No. 10/566,899 filed 01 Feb 2006,
claiming priority to 06 Aug 2003 (HHS
Reference No. E–301–2003/0–US–10);
U.S. Patent Application No. 10/566,898
filed 01 Feb 2006, claiming priority to
06 Aug 2003 (HHS Reference No. E–
301–2003/1–US–02); International
rights available.
Licensing Status: Available for nonexclusive licensing.
Licensing Contact: Peter A. Soukas,
J.D.; 301/435–4646;
soukasp@mail.nih.gov.
Neutralizing Monoclonal Antibodies to
Respiratory Syncytial Virus
Description of Technology:
Respiratory syncytial virus (RSV) is the
most common cause of bronchiolitis and
pneumonia among infants and children
under 1 year of age. Illness begins most
frequently with fever, runny nose,
cough, and sometimes wheezing. During
their first RSV infection, between 25%
and 40% of infants and young children
have signs or symptoms of bronchiolitis
or pneumonia, and 0.5% to 2% require
hospitalization. Most children recover
from illness in 8 to 15 days. The
majority of children hospitalized for
RSV infection are under 6 months of
age. RSV also causes repeated infections
throughout life, usually associated with
moderate-to-severe cold-like symptoms;
however, severe lower respiratory tract
disease may occur at any age, especially
among the elderly or among those with
compromised cardiac, pulmonary, or
immune systems.
This invention is a human
monoclonal antibody fragment (Fab)
discovered utilizing phage display
technology. The neutralizing
monoclonal antibody was isolated and
its binding site was identified. Fab F2–
5 is a broadly reactive fusion (F)
protein-specific recombinant Fab
generated by antigen selection from a
random combinatorial library displayed
on the surface of filamentous phage. In
an in vitro plaque-reduction test, the
Fab RSVF2–5 neutralized the infectivity
of a variety of field isolates representing
viruses of both RSV subgroups A and B.
The Fab recognized an antigenic
determinant that differed from the only
other human anti-F monoclonal
antibody (RSV Fab 19) described thus
far. A single dose of 4.0 mg of Fab
RSVF2–5/kg of body weight
administered by inhalation was
sufficient to achieve a 2000-fold
reduction in pulmonary virus titer in
VerDate Aug<31>2005
15:08 Aug 20, 2007
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RSV-infected mice. The antigen-binding
domain of Fab RSVF2–5 offers promise
as part of a prophylactic regimen for
RSV infection in humans.
Application: Respiratory Syncytial
Virus prophylaxis/therapeutic.
Development Stage: The antibodies
have been synthesized and preclinical
studies have been performed.
Inventors: Brian Murphy (NIAID),
Robert Chanock (NIAID), James Crowe
(NIAID), et al.
Publication: JE Crowe et al. Isolation
of a second recombinant human
respiratory syncytial virus monoclonal
antibody fragment (Fab RSVF2–5) that
exhibits therapeutic efficacy in vivo. J
Infect Dis. 1998 Apr;177(4):1073–1076.
Patent Status: HHS Reference No. E–
001–1996/0—U.S. and Foreign Rights
Available.
Licensing Status: Available for
exclusive or non-exclusive licensing.
Licensing Contact: Peter A. Soukas,
JD; 301/435–4646;
soukasp@mail.nih.gov.
Human Neutralizing Monoclonal
Antibodies to Respiratory Syncytial
Virus and Human Neutralizing
Antibodies to Respiratory Syncytial
Virus
Description of Technology: This
invention is a human monoclonal
antibody fragment (Fab) discovered
utilizing phage display technology. It is
described in Crowe et al., Proc Natl
Acad Sci USA. 1994 Feb 15;91(4):1386–
1390 and Barbas et al., Proc Natl Acad
Sci USA. 1992 Nov 1;89(21):10164–
10168. This MAb binds an epitope on
the RSV F glycoprotein at amino acid
266 with an affinity of approximately
109 M¥1. This MAb neutralized each of
10 subgroup A and 9 subgroup B RSV
strains with high efficiency. It was
effective in reducing the amount of RSV
in lungs of RSV-infected cotton rats 24
hours after treatment, and successive
treatments caused an even greater
reduction in the amount of RSV
detected.
Applications: Research and drug
development for treatment of respiratory
syncytial virus.
Inventors: Robert M. Chanock
(NIAID), Brian R. Murphy (NIAID),
James E. Crowe Jr. (NIAID), et al.
Patent Status: U.S. Patent 5,762,905
issued 09 June 1998 (HHS Reference No.
E–032–1993/1–US–01); U.S. Patent
6,685,942 issued 03 February 2004
(HHS Reference No. E–032–1993/1–US–
02); U.S. Patent Application No. 10/
768,952 filed 29 January 2004 (HHS
Reference No. E–032–1993/1–US–03).
Licensing Status: Available for nonexclusive licensing.
PO 00000
Frm 00048
Fmt 4703
Sfmt 4703
Licensing Contact: Peter A. Soukas,
JD; 301/435–4646;
soukasp@mail.nih.gov.
Murine Monoclonal Antibodies
Effective To Treat Respiratory
Syncytial Virus
Description of Technology: Available
for licensing through a Biological
Materials License Agreement are the
murine MAbs described in Beeler et al.,
‘‘Neutralization epitopes of the F
glycoprotein of respiratory syncytial
virus: effect of mutation upon fusion
function,’’ J Virol. 1989 July;63(7):2941–
2950. The MAbs that are available for
licensing are the following: 1129, 1153,
1142, 1200, 1214, 1237, 1112, 1269, and
1243. One of these MAbs, 1129, is the
basis for a humanized murine MAb (see
U.S. Patent 5,824,307 to humanized
1129 owned by MedImmune, Inc.),
recently approved for marketing in the
United States. MAbs in the panel
reported by Beeler et al. have been
shown to be effective therapeutically
when administered into the lungs of
cotton rats by small-particle aerosol.
Among these MAbs several exhibited a
high affinity (approximately 109 M¥1)
for the RSV F glycoprotein and are
directed at epitopes encompassing
amino acids 262, 272, 275, 276 or 389.
These epitopes are separate,
nonoverlapping and distinct from the
epitope recognized by the human Fab of
U.S. Patent 5,762,905 owned by The
Scripps Research Institute.
Applications: Research and drug
development for treatment of respiratory
syncytial virus.
Inventors: Robert M. Chanock, Brian
R. Murphy, Judith A. Beeler, and
Kathleen L. van Wyke Coelingh (NIAID).
Patent Status: HHS Reference No. B–
056–1994/1—Research Tool.
Licensing Status: Available for nonexclusive licensing under a Biological
Materials License Agreement.
Licensing Contact: Peter A. Soukas,
JD; 301/435–4646;
soukasp@mail.nih.gov.
Dated: August 13, 2007.
Steven M. Ferguson,
Director, Division of Technology Development
and Transfer, Office of Technology Transfer,
National Institutes of Health.
[FR Doc. E7–16401 Filed 8–20–07; 8:45 am]
BILLING CODE 4140–01–P
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Agencies
[Federal Register Volume 72, Number 161 (Tuesday, August 21, 2007)]
[Notices]
[Pages 46642-46646]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-16401]
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DEPARTMENT OF HEALTH AND HUMAN SERVICES
National Institutes of Health
Government-Owned Inventions; Availability for Licensing
AGENCY: National Institutes of Health, Public Health Service, HHS.
ACTION: Notice.
-----------------------------------------------------------------------
SUMMARY: The inventions listed below are owned by an agency of the U.S.
Government and are available for licensing in the U.S. in accordance
with 35 U.S.C. 207 to achieve expeditious commercialization of results
of federally-funded research and development. Foreign patent
applications are filed on selected inventions to extend market coverage
[[Page 46643]]
for companies and may also be available for licensing.
ADDRESSES: Licensing information and copies of the U.S. patent
applications listed below may be obtained by writing to the indicated
licensing contact at the Office of Technology Transfer, National
Institutes of Health, 6011 Executive Boulevard, Suite 325, Rockville,
Maryland 20852-3804; telephone: 301/496-7057; fax: 301/402-0220. A
signed Confidential Disclosure Agreement will be required to receive
copies of the patent applications.
Methods of Glycosylation and Bioconjugation
Description of Technology: Eukaryotic cells express several classes
of oligosaccharides attached to proteins or lipids. Animal glycans can
be N-linked via beta-GlcNAc to Asn (N-glycans), O-linked via -GalNAc to
Ser/Thr (O-glycans), or can connect the carboxyl end of a protein to a
phosphatidylinositol unit (GPI-anchors) via a common core glycan
structure. Beta (1,4)-galactosyltransferase I catalyzes the transfer of
galactose from the donor, UDP-galactose, to an acceptor, N-
acetylglucosamine, to form a galactose-beta (1,4)-N-acetylglucosamine
bond, and allows galactose to be linked to an N-acetylglucosamine that
may itself be linked to a variety of other molecules. Examples of these
molecules include other sugars and proteins. The reaction can be used
to make many types of molecules having great biological significance.
For example, galactose-beta (1,4)-N-acetylglucosamine linkages are
important for many recognition events that control how cells interact
with each other in the body, and how cells interact with pathogens. In
addition, numerous other linkages of this type are also very important
for cellular recognition and binding events as well as cellular
interactions with pathogens, such as viruses. Therefore, methods to
synthesize these types of bonds have many applications in research and
medicine to develop pharmaceutical agents and improved vaccines that
can be used to treat disease.
The invention provides in vitro folding method for a polypeptidyl-
alpha-N-acetylgalactosaminyltransferase (pp-GalNAc-T) that transfers
GalNAc to Ser/Thr residue on a protein. The application claims that
this in vitro-folded recombinant ppGalNAc-T enzyme transfers modified
sugar with a chemical handle to a specific site in the designed C-
terminal polypeptide tag fused to a protein. The invention provides
methods for engineering a glycoprotein from a biological substrate, and
methods for glycosylating a biological substrate for use in
glycoconjugation. Also included in the invention are diagnostic and
therapeutic uses.
Application: Enzymes and methods are provided that can be used to
promote the chemical linkage of biologically important molecules that
have previously been difficult to link.
Developmental Status: Enzymes have been synthesized and
characterization studies have been performed.
Inventors: Pradman Qasba and Boopathy Ramakrishnan (NCI/SAIC).
Patent Status: U.S. Provisional Application No. 60/930,294 filed 14
May 2007 (HHS Reference No. E-204-2007/0-US-01).
Licensing Status: Available for exclusive or non-exclusive
licensing.
Licensing Contact: Peter A. Soukas, J.D.; 301/435-4646;
soukasp@mail.nih.gov.
Collaborative Research Opportunity: The National Cancer Institute
is seeking statements of capability or interest from parties interested
in collaborative research to further develop, evaluate, or
commercialize this technology. Please contact John D. Hewes, Ph.D. at
301-435-3121 or hewesj@mail.nih.gov for more information.
Improved Bacterial Host for Production of Anthrax Toxin Proteins and
Vaccines: Bacillus anthracis BH450
Description of Invention: Anthrax toxin has previously been made
from various avirulent strains of Bacillus anthracis. The inventors
have genetically engineered a new strain of B. anthracis with improved
properties. The strain, designated BH450, is totally deficient in the
ability to make spores and to produce a major extracellular protease
designated Peptidase M4. The genetic lesions introduced are defined,
true deletions, so there is no possibility of reversion. Inability to
make spores assures that laboratories growing the strain will not
become contaminated with the very stable anthrax spores. Inability to
make peptidase M4 increases the stability of proteins such as anthrax
toxin that are secreted to the culture medium.
Applications and Modality: B. anthracis vaccine/prophylactic and
therapeutic studies.
Market: Research tool useful for biodefense/therapeutic studies.
Development Status: The technology is a research tool.
Inventors: Andrei Pomerantsev, Dana Hsu, Ramakrishnan Sitaraman,
Craig Galloway, Violetta Kivovich, Stephen Leppla (NIAID).
Publication: AP Pomerantsev et al. Genome engineering in Bacillus
anthracis using Cre recombinase. Infect Immun. 2006 Jan;74(1):682-693.
Patent Status: HHS Reference No. E-127-2007/0--Research Tool.
Licensing Status: This technology is not patented. The strain will
be transferred through a Biological Materials License.
Licensing Contact: Peter A. Soukas, J.D.; 301/435-4646;
soukasp@mail.nih.gov.
Collaborative Research Opportunity: The National Institute of
Allergy and Infectious Diseases, Laboratory of Bacterial Diseases, is
seeking statements of capability or interest from parties interested in
collaborative research to further develop, evaluate, or commercialize
Bacillus anthracis BH450 strain. Please contact Dr. Andrei P.
Pomerantsev at phone 301-451-9817 and/or e-mail
apomerantsev@niaid.nih.gov for more information.
Compositions and Methods for Increasing Recombinant Protein Yields
Through the Modification of Cellular Properties
Description of Technology: This technology relates to compositions
and methods for improving the growth characteristics of cells
engineered to produce biologically active products such as antibodies
or glycosylated proteins. Featured is a method that uses gene
candidates (e.g., cdkl3, siat7e, or lama4), or their expressed or
inhibited products in cell lines, such as Human Embryonic Kidney
(including HEK-293), HeLa, or Chinese Hamster Ovary (CHO). The gene
expression modulates growth characteristics, such as adhesion
properties, of the cell lines thereby increasing recombinant protein
yields and reducing product production costs.
Applications: This technology may be used to improve production of
therapeutic and/or diagnostic compounds, including therapeutic proteins
or monoclonal antibodies from mammalian cells. Optimization of
mammalian cells for use as expression systems in the production of
biologically active products is very difficult. For certain
applications, anchorage-independent cell lines may be preferred,
whereas for other applications, a cell line that adheres to a surface,
e.g. is anchorage-dependent, may be preferable. This technology
provides a method for identifying a gene whose expression modulates
such cellular adhesion characteristics. This method thus leads to an
increase in the
[[Page 46644]]
expression or yield of polypeptides, including therapeutic biologicals,
such as antibodies, cytokines, growth factors, enzymes,
immunomodulators, thrombolytics, glycosylated proteins, secreted
proteins, and DNA sequences encoding such polypeptides and a reduction
in the associated costs of such biological products.
Advantages: This technology offers the ability to improve yields
and reduce the cost associated with the production of recombinant
protein products through the selection of cell lines having: altered
growth characteristics; altered adhesion characteristics; altered rate
of proliferation; improvement in cell density growth; improvement in
recombinant protein expression level.
Market: Biopharmaceuticals, including recombinant therapeutic
proteins and monoclonal antibody-based products used for in vivo
medical purposes and nucleic acid based medicinal products now
represent approximately one in every four new pharmaceuticals on the
market. The market size has been estimated at $33 billion in 2004 and
is projected to reach $70 billion by the end of the decade. The list of
approved biopharmaceuticals includes recombinant hormones and growth
factors, mAB-based products and therapeutic enzymes as well as
recombinant vaccines and nucleic acid based products.
Mammalian cells are widely used expression systems for the
production of biopharmaceuticals. Human embryo kidney (including HEK-
293) and Chinese hamster ovary (CHO) are host cell of choice. The genes
identified in this technology (e.g., cdkl3, sia7e, or lama4) can be
used to modify these important cell based systems.
This technology is ready for use in drug/vaccine discovery,
production and development. The technology provides methods for
identification of specific gene targets useful for altering the
production properties of either existing cell lines to improve yields
or with new cell lines for the production of therapeutic and or
diagnostic compounds from mammalian cells.
Companies that are actively seeking production platforms based on
mammalian cell lines that offer high efficiency, high throughput
systems for protein production or analysis at lower cost and ease of
scale-up would be potential licensors of this technology.
Development Status: Late Stage--Ready for Production.
Inventors: Joseph Shiloach (NIDDK), Pratik Jaluria (NIDDK).
Related Publication: P. Jaluria et al. Application of microarrays
to identify and characterize genes involved in attachment dependence in
HeLa cells. Metab Eng. 2006 Dec 13, Epub ahead of print, doi:10.1016/
j.ymben.2006.12.001.
Patent Status: U.S. Provisional Application No. 60/840,381 filed 24
Aug 2006 (HHS Reference No. E-149-2006/0-US-01).
Licensing Status: Available for exclusive or non-exclusive
licensing.
Licensing Contact: Peter A. Soukas, J.D.; 301/435-4646;
soukasp@mail.nih.gov.
Collaborative Research Opportunity: The National Institute of
Diabetes and Digestive and Kidney Diseases, Biotechnology Core
Laboratory, is seeking parties interested in collaborative research
projects directed toward the use of this technology with cells for drug
and vaccine production and development, including growth optimization,
production and product recovery processes. For more information, please
contact Dr. Joseph Shiloach, josephs@intra.niddk.nih.gov, or Rochelle
S. Blaustein at Rochelle.Blaustein@nih.gov.
Methods for Conjugation of Oligosaccharides or Polysaccharides to
Protein Carriers Through Oxime Linkages Via 3-Deoxy-D-Manno-Octulsonic
Acid
Description of Technology: This technology comprises new methods
for the conjugation of O-specific polysaccharides/oligosaccharides (O-
SP/OS) derived from bacterial lipooligosaccharides/ lipopolysaccharides
(LOS/LPS), after their cleavage from Lipid A, to carrier proteins, to
serve as potential vaccines. Conjugation is performed between the
carbonyl group on the terminal reducing end of the saccharide and the
aminooxy group of a bifunctional linker bound further to the protein.
The inventors have carried out the reaction under mild conditions
and in a short time resulting in binding 3-deoxy-D-manno-octulosonic
acid (KDO) on the saccharide to the protein. These conjugates preserve
the external non-reducing end of the saccharide, are recognized by
antisera, and induce immune responses in mice to both conjugate
components (i.e., the OS and the associated carrier protein).
Application: Cost effective and efficient manufacturing of
conjugate vaccines.
Inventors: Joanna Kubler-Kielb (NICHD), Vince Pozsgay (NICHD), Gil
Ben-Menachem (NICHD), Rachel Schneerson (NICHD), et al.
Patent Status: U.S. Provisional Application No. 60/832,448 filed 21
Jul 2006 (HHS Reference No. E-183-2005/0-US-01); PCT Patent Application
filed 21 Jul 2007 (HHS Reference No. E-183-2005/0-PCT-02).
Licensing Status: Available for exclusive or non-exclusive
licensing.
Licensing Contact: Peter A. Soukas, J.D.; 301/435-4646;
soukasp@mail.nih.gov.
In Vitro Model for Hepatitis C Virion Production
Description of Technology: This invention provides an in vitro
hepatitis C virus (HCV) replication system that is capable of producing
viral particles in a culture medium. Hepatitis C is a major public
health problem, the development of therapeutics for which has been
hampered by a lack of a robust model system to study the complete viral
life cycle. This invention provides a new model system for the complete
replication cycle of hepatitis C virus and virion production, assembly
and release. The model is useful for screening antiviral agents against
HCV.
A full length HCV construct, CG1b of genotype 1b which is known to
be infectious, was placed between two ribozymes designed to generate
the exact 5' and 3' ends of HCV when cleaved. Using this system, HCV
proteins and positive and negative RNA strands have been shown to
reproduce intracellularly, and viral particles that resemble authentic
HCV virions are produced and secreted into the culture medium.
The patent application includes claims directed toward the
following: A construct comprising specific nucleic acid sequences
including HCV genotype 1b, genotype 1a, genotype 2a or potentially
other genotypes; a method for identifying a cell line that is
permissive for infection with HCV; a method for propagating HCV in
vitro; a method for screening agents capable of modulating HCV
replication or activity; a method for testing the level of HCV
replication or activity; a HCV vaccine comprising HCV virus particles.
Applications: The model offers a novel method for investigating the
entire HCV life cycle including replication and pathogenesis and is
useful for high-throughput antiviral screening. This technique may also
be useful for making infectious particles that are useful in the
production of HCV vaccines.
Advantages: This system provides a new, stable and efficient cell
culture model to further study the life cycle and biology of HCV, and
to test potential therapeutic targets for hepatitis C. This model has
also been used to generate in cell culture HCV strains infectious for
chimpanzees, the only experimental animal susceptible to infection with
the
[[Page 46645]]
hepatitis C virus, a critical step in the development of new vaccines
for Hepatitis C.
Market: Hepatitis C virus (HCV) chronically infects approximately
200 million people worldwide and increases the risk of developing
cirrhosis and hepatocellular carcinoma. This technology would be useful
for studying the HCV life cycle, screening for therapeutic agents
against multiple HCV strains, including Genotype 1a, 1b and 2a, and the
development of HCV vaccines. HCV genotypes 1 and 2 are the major
genotypes with worldwide distribution; they are known to be associated
with different clinical profiles and therapeutic responses. Hence, the
model may be used to screen for varying levels of effectiveness of
therapeutics against the major HCV genotypes.
Development Status: This technology is available for use in
diagnostics, drug/vaccine discovery, production and development.
Current work is directed toward studies into the HCV life cycle and
replication and the pathogenesis of HCV screening for antiviral agents
against multiple HCV strains. This model has been used to generate in
cell culture HCV strains infectious for chimpanzees, the only
experimental animal susceptible to infection with the hepatitis C
virus, a critical step in the development of new vaccines for Hepatitis
C. Future work may be directed toward the use of this system for
development of vaccine candidates against HCV.
Inventors: T. Jake Liang and Theo Heller (NIDDK).
Related Publications:
1. Z. Hu et al. Altered proteolysis and global gene expression in
hepatitis B virus X transgenic mouse liver. J Virol. 2006
Feb;80(3):1405-1413.
2. T. Heller et al. An in vitro model of hepatitis C virion
production. Proc Natl Acad Sci USA. 2005 Feb 15;102(7):2579-2583.
Patent Status: PCT Application No. PCT/US2005/035487 filed 30 Sep
2005 (HHS Reference No. E-324-2004/3-PCT-01), based on: U.S.
Provisional Application No. 60/615,301 filed 30 Sep 2004 (HHS Reference
No. E-324-2004/0-US-01), now abandoned; U.S. Provisional Application
No. 60/642,210 filed 06 Jan 2005 (HHS Reference No. E-324-2004/1-US-
01), now abandoned; U.S. Provisional Application No. 60/720,692 filed
26 Sep 2005 (HHS Reference No. E-324-2004/2-US-01), now abandoned.
Licensing Status: Available for exclusive or non-exclusive
licensing.
Licensing Contact: Peter A. Soukas, J.D.; 301/435-4646;
soukasp@mail.nih.gov.
Collaborative Research Opportunity: The National Institute of
Diabetes and Digestive and Kidney Diseases, Liver Diseases Branch, is
seeking parties interested in collaborative research directed toward
molecular strategies for vaccine and antiviral development, and animal
models of viral hepatitis C. Please contact Dr. T. Jake Liang at 301-
496-1721, jliang@nih.gov or Rochelle S. Blaustein at
Rochelle.Blaustein@nih.gov for more information.
Monoclonal Antibodies Against Orthopoxviruses
Description of Invention: Concerns that variola (smallpox) virus
might be used as a biological weapon have led to the recommendation of
widespread vaccination with vaccinia virus. While vaccination is
generally safe and effective for prevention of smallpox, it is well
documented that various adverse reactions in individuals have been
caused by vaccination with existing licensed vaccines. Vaccinia immune
globulin (VIG) prepared from vaccinated humans has historically been
used to treat adverse reactions arising from vaccinia immunization.
However, VIG lots may have different potencies and carry the potential
to transmit other viral agents.
Chimpanzee Fabs against the B5 and A33 outer extracellular membrane
proteins of vaccinia virus were isolated and converted into complete
mAbs with human gamma1 heavy chain constant regions. The two mAbs
displayed high binding affinities to B5 and A33. The mAbs inhibited the
spread of vaccinia virus as well as variola virus (the causative agent
of smallpox) in vitro, protected mice from subsequent intranasal
challenge with virulent vaccinia virus, protected mice when
administered 2 days after challenge, and provided significantly greater
protection than that afforded by VIG.
Application: Prophylactics or therapeutics against orthopoxviruses.
Developmental Status: Preclinical studies have been performed.
Inventors: Zhaochun Chen, Robert Purcell, Suzanne Emerson, Patricia
Earl, Bernard Moss (NIAID).
Publications:
1. Z. Chen et al. Chimpanzee/human mAbs to vaccinia virus B5
protein neutralize vaccinia and smallpox viruses and protect mice
against vaccinia virus. Proc Natl Acad Sci USA. 2006 Feb 7;103(6):1882-
1887. Epub 2006 Jan 25.
2. Z. Chen et al. Characterization of chimpanzee/human monoclonal
antibodies to the vaccinia A33 glycoprotein and its variola virus
homolog in vitro and in a vaccinia mouse protection model. J Virol.
2007 Jun 20; Epub ahead of print, doi 10.1128/JVI.00906-07.
Patent Status: PCT Patent Application No. PCT/US2006/048832 filed
22 Dec 2006 (HHS Reference No. E-145-2004/3-PCT-01); PCT Patent
Application No. PCT/US2006/048833 filed 22 Dec 2006 (HHS Reference No.
E-145-2004/4-PCT-01).
Licensing Status: Available for exclusive or non-exclusive
licensing.
Licensing Contact: Peter A. Soukas, J.D.; 301/435-4646;
soukasp@mail.nih.gov
Collaborative Research Opportunity: The National Institute of
Allergy and Infectious Diseases, Laboratory of Infectious Diseases, is
seeking statements of capability or interest from parties interested in
collaborative research to further develop, evaluate, or commercialize
Chimpanzee/human neutralizing monoclonal antibodies against
orthopoxviruses. Please contact Dr. Robert Purcell at 301-496 5090 for
more information.
A Method With Increased Yield for Production of Polysaccharide-Protein
Conjugate Vaccines Using Hydrazide Chemistry
Description of Technology: Current methods for synthesis and
manufacturing of polysaccharide-protein conjugate vaccines employ
conjugation reactions with low efficiency (about twenty percent). This
means that up to eighty percent of the added activated polysaccharide
(PS) is lost. In addition, inclusion of a chromatographic process for
purification of the conjugates from unconjugated PS is required.
The present invention utilizes the characteristic chemical property
of hydrazide groups on one reactant to react with aldehyde groups or
cyanate esters on the other reactant with an improved conjugate yield
of at least sixty percent. With this conjugation efficiency the
leftover unconjugated protein and polysaccharide would not need to be
removed and thus the purification process of the conjugate product can
be limited to diafiltration to remove the by-products of small
molecules. The new conjugation reaction can be carried out within one
or two days with reactant concentrations between 1 and 25 mg/mL at PS/
protein ratios from 1:2 to 3:1, at temperatures between 4 and 40
degrees Centigrade, and in a pH range of 5.5 to 7.4, optimal conditions
varying from PS to PS.
[[Page 46646]]
Application: Cost effective and efficient manufacturing of
conjugate vaccines.
Inventors: Che-Hung Robert Lee and Carl E. Frasch (CBER/FDA).
Patent Status: U.S. Patent Application No. 10/566,899 filed 01 Feb
2006, claiming priority to 06 Aug 2003 (HHS Reference No. E-301-2003/0-
US-10); U.S. Patent Application No. 10/566,898 filed 01 Feb 2006,
claiming priority to 06 Aug 2003 (HHS Reference No. E-301-2003/1-US-
02); International rights available.
Licensing Status: Available for non-exclusive licensing.
Licensing Contact: Peter A. Soukas, J.D.; 301/435-4646;
soukasp@mail.nih.gov.
Neutralizing Monoclonal Antibodies to Respiratory Syncytial Virus
Description of Technology: Respiratory syncytial virus (RSV) is the
most common cause of bronchiolitis and pneumonia among infants and
children under 1 year of age. Illness begins most frequently with
fever, runny nose, cough, and sometimes wheezing. During their first
RSV infection, between 25% and 40% of infants and young children have
signs or symptoms of bronchiolitis or pneumonia, and 0.5% to 2% require
hospitalization. Most children recover from illness in 8 to 15 days.
The majority of children hospitalized for RSV infection are under 6
months of age. RSV also causes repeated infections throughout life,
usually associated with moderate-to-severe cold-like symptoms; however,
severe lower respiratory tract disease may occur at any age, especially
among the elderly or among those with compromised cardiac, pulmonary,
or immune systems.
This invention is a human monoclonal antibody fragment (Fab)
discovered utilizing phage display technology. The neutralizing
monoclonal antibody was isolated and its binding site was identified.
Fab F2-5 is a broadly reactive fusion (F) protein-specific recombinant
Fab generated by antigen selection from a random combinatorial library
displayed on the surface of filamentous phage. In an in vitro plaque-
reduction test, the Fab RSVF2-5 neutralized the infectivity of a
variety of field isolates representing viruses of both RSV subgroups A
and B. The Fab recognized an antigenic determinant that differed from
the only other human anti-F monoclonal antibody (RSV Fab 19) described
thus far. A single dose of 4.0 mg of Fab RSVF2-5/kg of body weight
administered by inhalation was sufficient to achieve a 2000-fold
reduction in pulmonary virus titer in RSV-infected mice. The antigen-
binding domain of Fab RSVF2-5 offers promise as part of a prophylactic
regimen for RSV infection in humans.
Application: Respiratory Syncytial Virus prophylaxis/therapeutic.
Development Stage: The antibodies have been synthesized and
preclinical studies have been performed.
Inventors: Brian Murphy (NIAID), Robert Chanock (NIAID), James
Crowe (NIAID), et al.
Publication: JE Crowe et al. Isolation of a second recombinant
human respiratory syncytial virus monoclonal antibody fragment (Fab
RSVF2-5) that exhibits therapeutic efficacy in vivo. J Infect Dis. 1998
Apr;177(4):1073-1076.
Patent Status: HHS Reference No. E-001-1996/0--U.S. and Foreign
Rights Available.
Licensing Status: Available for exclusive or non-exclusive
licensing.
Licensing Contact: Peter A. Soukas, JD; 301/435-4646;
soukasp@mail.nih.gov.
Human Neutralizing Monoclonal Antibodies to Respiratory Syncytial Virus
and Human Neutralizing Antibodies to Respiratory Syncytial Virus
Description of Technology: This invention is a human monoclonal
antibody fragment (Fab) discovered utilizing phage display technology.
It is described in Crowe et al., Proc Natl Acad Sci USA. 1994 Feb
15;91(4):1386-1390 and Barbas et al., Proc Natl Acad Sci USA. 1992 Nov
1;89(21):10164-10168. This MAb binds an epitope on the RSV F
glycoprotein at amino acid 266 with an affinity of approximately 10\9\
M-1. This MAb neutralized each of 10 subgroup A and 9
subgroup B RSV strains with high efficiency. It was effective in
reducing the amount of RSV in lungs of RSV-infected cotton rats 24
hours after treatment, and successive treatments caused an even greater
reduction in the amount of RSV detected.
Applications: Research and drug development for treatment of
respiratory syncytial virus.
Inventors: Robert M. Chanock (NIAID), Brian R. Murphy (NIAID),
James E. Crowe Jr. (NIAID), et al.
Patent Status: U.S. Patent 5,762,905 issued 09 June 1998 (HHS
Reference No. E-032-1993/1-US-01); U.S. Patent 6,685,942 issued 03
February 2004 (HHS Reference No. E-032-1993/1-US-02); U.S. Patent
Application No. 10/768,952 filed 29 January 2004 (HHS Reference No. E-
032-1993/1-US-03).
Licensing Status: Available for non-exclusive licensing.
Licensing Contact: Peter A. Soukas, JD; 301/435-4646;
soukasp@mail.nih.gov.
Murine Monoclonal Antibodies Effective To Treat Respiratory Syncytial
Virus
Description of Technology: Available for licensing through a
Biological Materials License Agreement are the murine MAbs described in
Beeler et al., ``Neutralization epitopes of the F glycoprotein of
respiratory syncytial virus: effect of mutation upon fusion function,''
J Virol. 1989 July;63(7):2941-2950. The MAbs that are available for
licensing are the following: 1129, 1153, 1142, 1200, 1214, 1237, 1112,
1269, and 1243. One of these MAbs, 1129, is the basis for a humanized
murine MAb (see U.S. Patent 5,824,307 to humanized 1129 owned by
MedImmune, Inc.), recently approved for marketing in the United States.
MAbs in the panel reported by Beeler et al. have been shown to be
effective therapeutically when administered into the lungs of cotton
rats by small-particle aerosol. Among these MAbs several exhibited a
high affinity (approximately 10\9\ M-1) for the RSV F
glycoprotein and are directed at epitopes encompassing amino acids 262,
272, 275, 276 or 389. These epitopes are separate, nonoverlapping and
distinct from the epitope recognized by the human Fab of U.S. Patent
5,762,905 owned by The Scripps Research Institute.
Applications: Research and drug development for treatment of
respiratory syncytial virus.
Inventors: Robert M. Chanock, Brian R. Murphy, Judith A. Beeler,
and Kathleen L. van Wyke Coelingh (NIAID).
Patent Status: HHS Reference No. B-056-1994/1--Research Tool.
Licensing Status: Available for non-exclusive licensing under a
Biological Materials License Agreement.
Licensing Contact: Peter A. Soukas, JD; 301/435-4646;
soukasp@mail.nih.gov.
Dated: August 13, 2007.
Steven M. Ferguson,
Director, Division of Technology Development and Transfer, Office of
Technology Transfer, National Institutes of Health.
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