Geron Corporation Reports Publication of Research Supporting the Utility of Telomerase as a Universal Antigen for Cancer Immunotherapy
MENLO PARK, Calif., Mar 18, 2003 (BUSINESS WIRE) -- Geron Corporation
(Nasdaq: GERN) announced today the publication of research results that support
the utility of telomerase for widespread applications in cancer immunotherapy.
The research, published in the March 2003 issue of Cancer Gene Therapy, shows
that different types of cancer cells, including cancer cells without any known
tumor-associated antigens, can be killed by telomerase-based immunotherapy.
Geron scientists studied melanoma and colon cancer cell lines that are known to
express the tumor-associated antigens, MART-1 and CEA-1, respectively, and an
osteosarcoma line lacking any known tumor antigen. Telomerase was introduced
into human dendritic cells by gene transfer enabling the dendritic cells to
generate telomerase specific cytotoxic T-lymphocytes (CTLs) that killed all
three tumor cell lines. These findings show that telomerase vaccination can be
used in all cancer patients, even those with tumors that do not express any
known tumor-associated antigens.
Telomerase is activated in all human cancer types, including breast, lung,
colon, prostate, pancreatic and hematologic tumors. Telomerase is therefore an
attractive candidate for use as a universal therapeutic cancer vaccine. A Phase
1 study of Geron's ex-vivo telomerase vaccine is currently underway in patients
with metastatic prostate cancer at Duke University Medical Center.
Study Results
In the study, Geron scientists were able to show that dendritic cells (the most
potent antigen presenting cells in the body) obtained from the peripheral blood
of normal healthy volunteers can be modified in vitro with purified human
telomerase DNA or with an adenoviral vector containing human telomerase DNA. The
resulting telomerase-modified dendritic cells then present antigenic fragments
of the telomerase protein to T-lymphocytes, thereby enabling them to recognize
and kill telomerase-positive cancer cells. This study shows that dendritic cells
genetically modified with the telomerase gene can be used to generate an immune
response against cancer cells, and extends previous work that showed similar
results using telomerase RNA (Nature Medicine 2000;6:1011-1017) or telomerase
peptides (Proc. Natl. Acad. Sci. USA 2000; 25:4796-4801) as antigens. These
results support the potential use of telomerase as a universal cancer vaccine
administered directly to cancer patients in order to induce a strong and
specific anti-telomerase immune response in which the patients own lymphocytes
recognize and kill telomerase-expressing cancer cells.
"The universal expression of telomerase in cancer cells forms the rationale for
our ongoing programs in telomerase inhibition (GRN163), telomerase oncolytic
viruses (partnered with Genetic Therapy, Inc./ Novartis), and telomerase
immunotherapy, currently in Phase 1 clinical trials at Duke," said David B.
Karpf, Geron's executive medical director of oncology. "This study provides
additional support for the use of telomerase in cancer vaccine trials, and
suggests that telomerase-based immunotherapy may be useful for all cancer
patients regardless of the tumor antigen status of their cancer cells."
Physicians or patients who would like more information on the Duke telomerase
vaccine trial may contact the clinical trials coordinator at 919/668-3457.
Geron is a biopharmaceutical company focused on developing and commercializing
therapeutic and diagnostic products for applications in oncology and
regenerative medicine, and research tools for drug discovery. Geron's product
development programs are based upon three patented core technologies:
telomerase, human embryonic stem cells, and nuclear transfer.
This news release may contain forward-looking statements made pursuant to the
"safe harbor" provisions of the Private Securities Litigation Reform Act of
1995. Investors are cautioned that such forward-looking statements in this press
release regarding future applications of Geron Corporation's technology
constitute statements involving risks and uncertainties, including, without
limitation, risks inherent in the development and commercialization of potential
products, need for additional capital, regulatory approvals and clearances, and
the maintenance of our intellectual property rights. Actual results may differ
materially from the results anticipated in these forward-looking statements.
Additional information on potential factors that could affect our results and
other risks and uncertainties are detailed from time to time in Geron's periodic
reports, including the annual report on Form 10-K for the year ended December
31, 2002.
CONTACT: Geron Corporation, Menlo Park
David L. Greenwood, 650/473-7765
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FirstAlert 3/19: Paris in the Springtime
Mar 19, 2003 (financialwire.net via COMTEX) -- (FinancialWire) Saddam, have you
seen Paris in the Springtime? Flowers blooming, a cozy rendezvous at a sidewalk
cafe on the Champs Elysee, taking in some Leonardos and Michaelangelos at the
Louvre, scenic walks along the Seine, and the opportunity to have a picture
taken of yourself next to a cardboard cutout of yourself in front of Notre Dame,
lots of mustached former dictators to hang out with in the West Bank, and of
course, your friend and benefactor Jacques Chirac as your personal host and
guide. Too, there is Les Folies Bergere and haberdasheries galore. You may have
to get used to the snide waiters and confusion over the menus, but Saddam, your
psychotic sons would just love the place. They'd get themselves a little Vespa
and while they'd actually have to romance rather than command women as subjects,
they could get used to that. But, noooooo, you're going to stay right there and
put your countrymen in harm's way. You couldn't even wait for the clock to tick
down. Well, they're coming, Saddam. There are no economic indicators due out
today, so the focus is on you, Saddam. Have a nice life, what's left of it.
FirstAlert focuses today on Nike Corp. (NYSE: NKE), which reports profits after
the bell, Albertson's (NYSE: ABS), expected at $0.51, Biomet (NASDAQ: BMET), at
$0.28, FedEx (NYSE: FDX), at $0.51, General Mills (NYSE: GIS), at $0.66 and
Univision (NYSE: UVN), expected at $0.13. A key report will be coming from Bear
Stearns (NYSE: BCS), expected at $1.33, and the first of four retail brokers'
reports over two days that will give a better picture of how the institutions,
many of them under fire, have been holding up. Finally, XTO Energy (NYSE: XTO),
is set to forward split 4-3 today. The Investrend 50 Most Actives Tuesday found
39 advancing and 11 declining, with most of the decliners on the Nasdaq. Leading
the advancers were Geron Corp. (NASDAQ: GERN), up a phenomenal 142.77% on news
it may have an anthrax vaccine, along with Human Genome (NASDAQ: HGSI), up a
"piddling" 12.81%, and Advanced Micro Device (NYSE: AMD), up 12.74%. The leading
decliners were "it couldn't happen to a nicer stock" Altria Group (NYSE: MO),
down 5.99%, and Veritas Software (NASDAQ: VRTS, off 3.13%. Most of the most
actives traded in a narrow mid-range.
These conditions may impact the conference calls on tap today on Investrend
Broadcast via partner BestCalls. Conference call details are at Investrend
Broadcast at www.investrend.com/articles/secondlevel.asp?level=164 and at
www.financialwire.net .
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