CEL SCI Collaborators Demonstrate Novel L.E.A.P.S. Vaccines Immunize Mice Against Tuberculosis Antigens and Suggest Potential to
05 6월 2009 - 9:59PM
PR Newswire (US)
VIENNA, Va., June 5 /PRNewswire-FirstCall/ -- CEL-SCI Corporation
(NYSE AMEX: CVM) announced today that its collaborators at the
University of Hawaii reported on data at the annual American
Society for Microbiology in Philadelphia, PA. This data
demonstrates that vaccines utilizing its L.E.A.P.S.(TM) (Ligand
Epitope Antigen Presentation System) vaccine technology with
specificity for particular Mycobacterium tuberculosis (TB) antigens
can elicit immune responses that would be protective against
tuberculosis and have the potential to treat swine and other H1N1
influenzas. The investigators presented data that showed that blood
cells from immunized mice produced gamma interferon in response to
the vaccine, while the blood cells from mice in the various control
groups did not. Gamma interferon, a cytokine that helps regulate
the body's immune response, is considered to be a good indicator of
protection against TB and other diseases. The production of too
many pro-inflammatory cytokines is thought to be a cause of death
in the case of H1N1 influenza. It is for this reason that CEL-SCI
believes that the L.E.A.P.S. technology, which induces an effective
protective immune response without causing excessive amounts of
pro-inflammatory cytokines, may be effective against H1N1
influenza. In prior tests involving L.E.A.P.S. herpes simplex
vaccines, CEL-SCI and other researchers showed that the production
of gamma interferon was a good indicator for protection against
herpes simplex as well. Dr. Borthakur, of the University of Hawaii,
reported at the Microbiology Conference that mouse blood cells
taken from L.E.A.P.S. TB immunized mice made detectable amounts of
gamma interferon within one day of treatment. Dr. Daniel Zimmerman,
the inventor of the technology believes that the data presented by
Dr. Borthakur's group will also be beneficial in developing more
improved TB vaccines, perhaps ones including the L.E.A.P.S.
conjugates known to elicit protective cytokines such as IL-12, a
precursor to producing gamma interferon, and gamma interferon
itself. The L.E.A.P.S. technology combines a small peptide that
activates the immune system with a small peptide from a
disease-related protein, such as a herpes simplex virus (HSV)
glycoprotein to make a vaccine that induces a defined immune
response. Last month Dr. Kenneth S. Rosenthal, Professor of
Microbiology, Immunology and Biochemistry at Northeastern Ohio
Universities Colleges of Medicine and Pharmacy and colleagues
showed that CEL-SCI's L.E.A.P.S. vaccines can activate and cause
human immature dendritic cells from blood monocyte cells to become
dendritic cells that secrete the IL-12 cytokine. The dendritic
cells that result initiate a protective cell mediated and antibody
immune response. These results were obtained for L.E.A.P.S.
vaccines against HSV and HIV. The use of the L.E.A.P.S. vaccine
technology may thus open a whole new way of maturing dendritic cell
vaccines for infectious diseases such as pandemic flu and cancer.
The cytokine IL-12 is the first step in gamma interferon production
which is known to be protective with many viruses and pathogens.
"It is very exciting to see the effect of L.E.A.P.S. vaccines on
isolated human immature dendritic cells using a simple molecule, in
two different instances," said Dr. Zimmerman. "I am hopeful that
other L.E.A.P.S. vaccine candidates, such as CEL-2000 being
developed as a vaccine for rheumatoid arthritis, can also be used
with comparable results in humans. The lack of proinflammatory
cytokine production in responses to the L.E.A.P.S. vaccines is
especially important for an immunotherapy aimed at rheumatoid
arthritis, since these cytokines cause much of the damage seen in
rheumatoid arthritis patients, and has important implications for
our ability to develop an effective treatment for swine flu and
other H1N1 flu viruses." L.E.A.P.S. technology is a novel T-cell
modulation platform technology that enables CEL-SCI to design and
synthesize proprietary immunogens. Any disease for which an
antigenic sequence has been identified, such as infectious,
parasitic, malignant or autoimmune diseases and allergies, are
potential therapeutic or preventive sites for the application of
L.E.A.P.S. technology. CEL-SCI Corporation is developing products
that empower immune defenses. Its lead product is Multikine(R)
which is being readied for a global Phase III trial. The Company
has operations in Vienna, Virginia, and Baltimore, Maryland. When
used in this report, the words "intends," "believes," "anticipated"
and "expects" and similar expressions are intended to identify
forward-looking statements. Such statements are subject to risks
and uncertainties which could cause actual results to differ
materially from those projected. Factors that could cause or
contribute to such differences include: an inability to duplicate
the clinical results demonstrated in clinical studies, timely
development of any potential products that can be shown to be safe
and effective, receiving necessary regulatory approvals,
difficulties in manufacturing any of the Company's potential
products, inability to raise the necessary capital and the risk
factors set forth from time to time in CEL-SCI Corporation's SEC
filings, including but not limited to its report on Form 10-K/A for
the year ended September 30, 2008. The Company undertakes no
obligation to publicly release the result of any revision to these
forward-looking statements which may be made to reflect the events
or circumstances after the date hereof or to reflect the occurrence
of unanticipated events. DATASOURCE: CEL-SCI Corporation CONTACT:
Gavin de Windt of CEL-SCI Corporation, +1-703-506-9460 Web Site:
http://www.cel-sci.com/
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