Molecular Profile Detail

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Profile Name PIK3CA E542K PTEN loss
Gene Variant Detail

PIK3CA E542K (gain of function)

PTEN loss (loss of function)

Relevant Treatment Approaches

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Molecular Profile Indication/Tumor Type Response Type Relevant Treatment Approaches Therapy Name Approval Status Evidence Type Efficacy Evidence References
PIK3CA E542K PTEN loss lung squamous cell carcinoma sensitive Alpelisib Preclinical - Pdx Actionable In a preclinical study, Alpelisib (BYL719) treatment resulted in response in a lung squamous cell carcinoma patient-derived xenograft (PDX) model harboring PIK3CA E542K and PTEN loss (PMID: 30093452). 30093452
PIK3CA E542K PTEN loss breast cancer predicted - sensitive CYH33 Preclinical - Cell culture Actionable In a preclinical study, CYH33 inhibited proliferation of a breast cancer cell line harboring PIK3CA E542K and PTEN loss in culture (PMID: 30003928). 30003928
PIK3CA E542K PTEN loss stomach cancer unknown Sirolimus Phase 0 Actionable In a pilot clinical trial, Rapamune (sirolimus) demonstrated modest clinical activity in patients with PIK3CA-mutant gastric cancer (n=3) or hilar cholangiocarcinoma (n=1), including a gastric cancer patient harboring PIK3CA E542K and PTEN loss, with a 0% response rate, median progression-free survival of 1.9 months, and median overall survival of 3.6 months (PMID: 28685070). 28685070
PIK3CA E542K PTEN loss breast cancer sensitive Taselisib Preclinical - Cell culture Actionable In a preclinical study, a breast cancer cell line harboring PIK3CA E542K was sensitive to treatment with Taselisib (GDC-0032) in culture, demonstrating decreased cell viability (PMID: 31534012). 31534012
PIK3CA E542K PTEN loss breast cancer predicted - sensitive Dactolisib + WEHI-539 Preclinical - Cell culture Actionable In a preclinical study, inhibition of Pi3k signaling by BEZ235 sensitized breast cancer cell lines harboring PIK3CA E542K and PTEN loss to WEHI-539 in culture (PMID: 27974663). 27974663
Clinical Trial Phase Therapies Title Recruitment Status Covered Countries Other Countries