## BACKGROUND. Infusion of dendritic cells (DCs) pulsed with PSMA peptides was considered possible in hormone-refractory metastatic prostate cancer patients both with or without prior treatment with a greater number of DCs and for lesser infusions than previously administered. METHODS. DCs + PSMA p
Follow-up evaluation of prostate cancer patients infused with autologous dendritic cells pulsed with PSMA peptides
โ Scribed by Tjoa, B.A.; Erickson, S.J.; Bowes, V.A.; Ragde, H.; Kenny, G.M.; Cobb, O.E.; Ireton, R.C.; Troychak, M.J.; Boynton, A.L.; Murphy, G.P.
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 211 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0270-4137
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โฆ Synopsis
BACKGROUND.
We recently conducted a phase I clinical trial administering autologous dendritic cells pulsed with prostate-specific membrane antigen (PSMA) peptides to advanced prostate cancer patients. Participants were divided into 5 groups receiving 4 or 5 infusions of peptides alone (PSM-P1 or -P2; groups 1 and 2, respectively), autologous DC (group 3), or DC pulsed with PSM-P1 or -P2 (groups 4 and 5, respectively). Seven partial responders were observed. Follow-up evaluation of these responders is presented in this report. METHODS. Clinical monitoring for hematological studies and prostate markers was conducted up to 370 days from the start of the phase I study. Data collected include: lymphocyte, hematocrit, alkaline phosphatase, prostate-specific antigen (PSA), free PSA, and PSMA levels. RESULTS. Groups 4 and 5 (patients infused with DC pulsed with PSM-P1 or -P2) represented 5/7 responders. The length of response was between 100 days (1 patient) to 200 days or above (6 patients). Four patients still remained responsive at the end of the period of observation. CONCLUSIONS. The responses observed in this phase I clinical trial are significant and of long duration. Most of the responders were in treatment groups infused with DC pulsed with PSM-P1 or -P2, suggesting the requirement of both components for effective immunotherapy.
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