New Study Shows Listeria Vaccine for Cervical Cancer Found Safe
2007年10月16日 - 6:05PM
PRニュース・ワイアー (英語)
NORTH BRUNSWICK, N.J., Oct. 16 /PRNewswire-FirstCall/ --
Researchers testing a vaccine based on the live bacteria Listeria,
in women with advanced cervical cancer found it to be safe. The
Lovaxin C vaccine being developed by Advaxis Inc. (OTC:ADXS)
(BULLETIN BOARD: ADXS) , is intended to treat cervical cancer and
head and neck cancers that result from the human papilloma virus
(HPV). This marked the first time the vaccine had been treated in
humans. "Our long held belief that live Listeria vaccines are safe,
even in end stage cancer patients, has been confirmed with the
results from our recent Phase I/II study. We have just entered the
age of safe bacterial therapies," said Dr. John Rothman, VP of
Clinical Development. The immune response that Listeria generates
is called "cellular" immunity, the type needed to attack cancer.
Listeria is one of the strongest stimulators of cellular immunity
known. "By redirecting it against specific tumor types safely, we
have created a new, and potentially very effective, class of cancer
therapy," says Rothman. Advaxis reported treating fifteen patients
in three dosage groups with thirty-minute 250 ml infusions of
Lovaxin C at three-week intervals. Patients were observed for a
total of 111 days. With the exception of two women, all patients
had had either stage IVb advanced, recurrent, or progressive
cervical cancer. Every patient experienced a flu-like syndrome in
the three-to-twelve hours after dosing comprised of fever, chills,
nausea, and occasional vomiting, which is consistent with immune
stimulation. In the lower two doses, symptoms were well tolerated
and resolved with the use of over the counter analgesics and
antihistamines. Although efficacy was not a primary focus of the
trial, efficacy findings were obtained. Of the seven stable
patients, three had reductions in their tumor mass subsequent to
treatment. While most lesions increased in size, tumor reduction
was seen in a number of lesions and two tumors disappeared
completely. One patient with IVb cancer, who had failed two prior
courses of chemotherapy and a course of radiation was deemed
sufficiently healthy to resume chemotherapy undergo surgery after
receiving the vaccine and was removed from the trial early for this
purpose and currently tumor free. "This milestone has given us the
direction for the continued development Listeria-based vaccines,"
said Rothman. Further vaccines in development target breast,
ovarian and lung cancers. For more information log on to
http://www.advaxis.com/. DATASOURCE: Advaxis, Inc. CONTACT: Janet
Vasquez of IRG, +1-212-825-3210, for Advaxis, Inc. Web site:
http://www.advaxis.com/
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