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Bellicum Pharmaceuticals, Inc. Systemic and Antigen-Specific Immune Responses in Patients Treated With Cancer Vaccine BPX-101 Correlate With Clinical Response Interim Phase I/II Results Presented at American Association for Cancer Research 2010 Annual Meeting


4/19/2010 9:38:50 AM

HOUSTON, April 19 /PRNewswire/ -- Bellicum Pharmaceuticals, Inc., a company developing therapeutic cancer vaccines, today announced the presentation of interim Phase I/II efficacy data for BPX-101, a novel dendritic cell vaccine for metastatic castrate resistant prostate cancer (mCRPC), in a Late Breaking poster at the American Association for Cancer Research (AACR) 101st Annual Meeting 2010 held in Washington, D.C.

Guru Sonpavde, M.D., Principal Investigator at The University of Texas Health Science Center-Houston, presented interim Phase I/II data that suggest a correlation between dose-related variations in levels of inflammatory serum markers and measurable clinical response in patients treated with BPX-101. Correlative PSA declines, suppression of serum IL-6, and antigen-specific immune responses were also reported.

The trial was designed to establish the safety and maximum tolerated dose of BPX-101 in combination with activating agent AP1903, administered every other week for six doses. Exploratory efficacy endpoints include radiological and biochemical assessments of clinical response, and assessments of serum and biopsy samples for systemic and antigen-specific immunological responses.

Interim data from six subjects shows the combination of BPX-101 and AP103 to be safe and well tolerated at low and mid doses of BPX-101, with no unexpected drug-related adverse events reported. Clinical responses were evident within the first 12 weeks of treatment, in both low and mid dose cohorts:

Systemic immunological responses were determined by assessment of a panel of chemokines and cytokines at each dose and one week after each dose. Clinically responding subjects tended to exhibit dramatic and consistent increases in these serum markers one week after each dose, returning to baseline the following week. Antigen specific immune responses, measured in injection site reaction biopsies taken after three doses, were detected in four of four assessable subjects, including two clear TH1-biased responses.

The apparent dose-response correlation between clinical and immunological responses will be further investigated in six subjects now enrolling in the final, high dose cohort.

Bellicum Founder, President and Chief Medical Officer, Kevin M. Slawin, M.D., stated, "We are very excited and encouraged by this early data, which appears to contradict the prevailing belief that while cancer vaccines can prolong overall survival, they do not elicit measurable clinical or biomarker responses in the near term. We look forward to completing our trial later this year and initiating Phase II trials in 2011."

About Bellicum Pharmaceuticals

Bellicum Pharmaceuticals, Inc. is developing next generation therapeutic vaccines for the treatment of cancer and infectious diseases. The company's pharmacologically regulated DeCIDe(TM) vaccines are designed to kill targeted cells by inducing a potent, durable, fully activated antigen-specific TH1 immune response. Lead product BPX-101, an autologous DeCIDe(TM) vaccine, is in clinical development for patients with metastatic castrate resistant prostate cancer (mCRPC). For more information, visit http://www.bellicum.com

CONTACT: Tom Farrell, Chief Executive Officer of Bellicum Pharmaceuticals,
Inc., +1-713-341-6472, tfarrell@bellicum.com; or Joleen Schultz of Mentus,
Life Science, +1-858-455-5500, ext. 215, jschultz@mentus.com, for Bellicum
Pharmaceuticals, Inc.

Web site: http://www.bellicum.com/



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