trials of anti-cancer p53 drugs: basically nothing has worked so far
- ph 1/2 PC14586 (p53-Y220C refolder) in advanced solid tumors w/ Y220C mutation. Monotherapy in patients ORR 33% in Phase 2, still ongoing, and 43% ORR in ovarian cancer patients. A lot of partial responses.
- ph 1/2
$PMVP PC14586 (p53-Y220C refolder) in advanced solid tumors w/ Y220C mutation. Monotherapy in patients ORR 33% in Phase 2, still ongoing, and 43% ORR in ovarian cancer patients. A lot of partial responses. (see image)
- ph3 idasanutlin (MDM2i) in AML was stopped for futility based on interim analysis (idasanutlin cytarabine vs cytarabine) NCT02545283 MIRROS
$RHHBY. Work on WT p53 and toxic (cytopenias, GI AEs, etc.) and quick aquired resistance
- KT-253 from
$KYMR in R/R solid tumors, ALL, and lymphoma completed phase 1 but no mention of it since on their pipeline
- Gendicine, APPROVED in china in 2003 (recombinant human WT p53 packaged in AAV) for tx of HSNCC. mechanism is questionable and valid concerns for immunogenicity.
"Though their studies show that, when combined with traditional chemotherapy regimens, patients treated with rAD-p53 live longer post-diagnosis, the interpretation of these results must be put in the context of the finding that p53 mutation status did not significantly influence efficacy outcomes and long-term survival rate for Ad-p53-treated patients" (Zhang et al 2018 The first approved gene therapy product for cancer ad-p53 (gendicine): 12 years in the clinic. Hum. Gene. Ther.)
- Ph3 advexin (adenoviral vector that carries wt p53) with no real efficacy in recurrent HSCC. FDA issues "not sufficiently complete to file" in response to BLA and program died shortly thereafter. Pulled from EMA too.
- Arsenic trioxide (induces E3 ligase ubiquinitation of mutant p53 resuce mutant p53) in phase 2 and 3 in p53 mt MDS but status unknown (NCT03377725, NCT03381781)
- ph 1/2 p53 vaccine no effect in vaccine vs control in SCLC response rate (Chiappori et al. Cancer Immunol. Immunother 2019)