Prior to the advent of ICIs, prostate cancer had one of the first approvals for cancer immunotherapy with sipleucel-T, an anti-cancer vaccine...Most notably, clinical trials with bispecific T-cell engagers (BiTEs) targeting tumor antigens like STEAP-1 and KLK2 have shown clinical promise. Moving beyond ICIs may lead to new approaches to alter the prostate cancer tumor immune microenvironment and improve clinical outcomes.
3 months ago
Review • Journal • Checkpoint inhibition
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STEAP1 (STEAP Family Member 1) • KLK2 (Kallikrein-related peptidase 2)
P2, N=26, Recruiting, H. Lee Moffitt Cancer Center and Research Institute | Trial completion date: Dec 2025 --> Dec 2026 | Trial primary completion date: Mar 2025 --> Aug 2025
7 months ago
Trial completion date • Trial primary completion date
IFN-β responses to TLR1/2 signaling correlated with increased numbers of IFN-β producing T cells after broad, tumor antigen independent stimulation. Thus, peripheral innate immunity differs by race, may predict survival after sip-T, and associates with peripheral T cell functionality in men with mCRPC.
The presence of T-cells specific for the PAP target antigen was detectable in 6/10 (60%) individuals with nmCSPC, and 3/5 (60%) individuals with nmCRPC, many years after immunization. The detection of immune responses to the vaccine target years after immunization suggests durable immunity can be elicited in patients using a DNA vaccine encoding a tumor-associated antigen.Trial Registration: NCT00582140 and NCT00849121.