Long-term follow-up of HLA-A2+ patients with high-risk, hormone-sensitive prostate cancer vaccinated with the prostate specific antigen peptide homologue, PSA146-154
Supriya Perambakam
Hui Xie
Seby Edassery
David J. Peace
10027/8404
https://indigo.uic.edu/articles/journal_contribution/Long-term_follow-up_of_HLA-A2_patients_with_high-risk_hormone-sensitive_prostate_cancer_vaccinated_with_the_prostate_specific_antigen_peptide_homologue_PSA146-154/10761599
Twenty eight HLA-A2+ patients with high-risk, locally advanced or metastatic, hormone-sensitive prostate cancer were immunized with a peptide homologue of prostate specific antigen, PSA146-154, between July 2002 to September 2004 and monitored for clinical and immune responses. Fifty percent of the patients developed strong PSA146-154-peptide specific delayed type hypersensitivity skin responses, tetramer and/or IFN-γ responses within one year. Thirteen patients had stable or declining serum levels of PSA one year post-vaccination. A decreased risk of biochemical progression was observed in patients who developed augmented tetramer responses at six months compared to pre-vaccination levels (p=0.02). Thirteen patients have died while 15 patients remain alive with a mean overall survival of 60 months (95% CI, 51 to 68 months) per Kaplan-Meier analysis. A trend towards greater overall survival was detected in men with high-risk, hormone-sensitive CaP who developed specific T-cell immunity following vaccination with PSA146-154 peptide.
2012-06-27 00:00:00
PSA146-154 peptide
Vaccine
high-risk prostate cancer
hormone-sensitive prostate cancer
tetramer
IFN-gamma
overall survival
serum PSA
delayed type hypersensitivity skin responses
gene expression profile