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Bone Marrow Transplant. 2000 Jun;25(12):1233-41.

Clinical outcome of breast and ovarian cancer patients treated with high-dose chemotherapy, autologous stem cell rescue and THERATOPE STn-KLH cancer vaccine.

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Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA.


The purpose of this study was to evaluate the toxicity and potential efficacy of administering the THERATOPE STn-KLH cancer vaccine to ovarian and breast cancer patients after an autologous stem cell transplant. Forty patients (11 high-risk stage II/III breast cancer, 22 stage IV breast cancer, and seven stage III/IV ovarian cancer patients) were treated with high-dose chemotherapy followed by autologous/syngeneic stem cell rescue and vaccination with THERATOPE STn-KLH (Sialyl-Tn-KLH with Detox-B Stable Emulsion). Each patient was scheduled to receive a total of five vaccinations beginning on days 30-151 after stem cell infusion. The vaccine was well tolerated. Induration and erythema at the site of injection were the most common side-effects. When one compares the outcome of patients vaccinated with 66 breast and ovarian cancer patients who were not, following risk-adjustment analysis, vaccinated patients appeared more likely to survive (P = 0.07) and less likely to relapse (P = 0. 10). Vaccinated patients with the greatest specific lytic activity against STn+OVCAR tumor cells relative to nonspecific killing of Daudi cells tended to remain in remission longer than patients who displayed less specific immune activity (P = 0.057). We conclude that the THERATOPE STn-KLH cancer vaccine is well tolerated in breast and ovarian cancer patients after autologous transplant and, while not statistically significant, the trends in data support the concept that THERATOPE vaccine may decrease the risk for relapse and death and thus warrants further study. Bone Marrow Transplantation (2000) 25, 1233-1241.

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