Follow-up evaluation of prostate cancer patients infused with autologous dendritic cells pulsed with PSMA peptides.
Prostate
; 32(4): 272-8, 1997 Sep 01.
Article
in En
| MEDLINE
| ID: mdl-9288186
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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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Peptide Fragments
/
Prostatic Neoplasms
/
Dendritic Cells
/
Prostate-Specific Antigen
Type of study:
Clinical_trials
/
Observational_studies
/
Prognostic_studies
Limits:
Humans
/
Male
Language:
En
Journal:
Prostate
Year:
1997
Document type:
Article
Affiliation country:
Estados Unidos
Country of publication:
Estados Unidos