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February 9, 2004
Breast Cancer Vaccine Study Supported by Unique “Progress for Patients”
Grant
from Avon and National Cancer Institute
Study Evaluates Immune Response to Telomerase Tumor Antigen as Possible
Vaccine
(Philadelphia, PA) – Researchers at the Abramson Cancer Center
of the University of Pennsylvania have begun a Phase I clinical
trial to evaluate the effectiveness of a telomerase peptide as a possible vaccine
against breast cancer. The study will measure potential tumor cell shrinkage
in patients after an immune response has been triggered to an antigen –
the telomerase peptide – found in more than 90 percent of breast cancer
tumors.
The study is made possible through a unique $500,000 grant from the “Avon-NCI
Progress for Patients” Awards program, a special private-public partnership
between the Avon Foundation, Inc. and the National Cancer Institute (NCI) dedicated
to accelerating early phase clinical research into promising therapies.
“This is the first clinical study to use a telomerase peptide as a possible
vaccine against breast cancer,” said lead researcher Robert Vonderheide,
MD, DPhil, an assistant professor at the Leonard and Madlyn
Abramson Family Cancer Research Institute at the University of Pennsylvania.
“Our hope is that the immune response will kill the cancer and improve
the health of patients.”
Twenty-eight patients with metastatic breast cancer will be enrolled in the
study, which is expected to last two years. Patients will be injected with one
of three escalating doses of the telomerase antigen in combination with adjuvant
therapies (granulocyte-macrophage colony stimulating factor, GM-CSF) over a
period of seven months. The immune and tumor response to the telomerase-based
vaccine will be monitored over the duration of the study and compared to a control
response to an injection of cytomegalovirus peptide.
The results of an earlier feasibility study – also led by Vonderheide
and published in the February 1st edition of the journal Clinical Cancer
Research – showed immune responses with little toxicity in seven
breast and prostate cancer patients after they were injected with small amounts
of a similar telomerase peptide vaccine.
“One breast cancer patient in the earlier study showed temporary tumor
regression, prompting us to accelerate research into the possibility of a vaccine,”
said trial principal investigator Susan Domchek, MD, a breast
medical oncologist at the Abramson Cancer Center and assistant professor at
Penn’s School of Medicine.
Patients can obtain further information about the trial by calling: (215) 573-6760,
or toll free at 1-800-789-Penn (7366).
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The Abramson Cancer Center of the University of Pennsylvania was established in 1973 as a center of excellence in cancer research, patient care, education and outreach. Today, the Abramson Cancer Center ranks as one of the nation’s best in cancer care, according to US News and World Report, and is one of the top five in National Cancer Institute (NCI) funding. It is one of only 39 NCI-designated comprehensive cancer centers in the United States. Home to one of the largest clinical and research programs in the world, the Abramson Cancer Center of the University of Pennsylvania has 275 active cancer researchers and 250 Penn physicians involved in cancer prevention, diagnosis and treatment. More information about the Abramson Cancer Center is available at: www.pennhealth.com/cancer
Release available online at http://www.uphs.upenn.edu/news/News_Releases/feb04/avon.htm