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Profile Name | PIK3CA R88Q |
Gene Variant Detail | |
Relevant Treatment Approaches | Akt Inhibitor (Pan) Akt1 Inhibitor Akt2 Inhibitor mTOR Inhibitor mTORC1 Inhibitor mTORC2 Inhibitor PI3K Inhibitor (Pan) PIK3CA inhibitor |
Molecular Profile | Indication/Tumor Type | Response Type | Relevant Treatment Approaches | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
---|---|---|---|---|---|---|---|---|
PIK3CA R88Q | colorectal cancer | predicted - sensitive | Cetuximab + Floxuridine + Fluorouracil + Irinotecan | Case Reports/Case Series | Actionable | In a retrospective analysis, treatment with the combination of Erbitux (cetuximab), Adrucil (fluorouracil), Camptosar (irinotecan), and Floxuridine resulted in at least 24 months without evidence of disease in a colorectal carcinoma patient harboring a PIK3CA R88Q mutation (PMID: 25714871). | 25714871 | |
PIK3CA R88Q | malignant pleural mesothelioma | predicted - sensitive | mTOR Inhibitor PI3K Inhibitor (Pan) | Apitolisib | Case Reports/Case Series | Actionable | In a Phase I trial, treatment with Apitolisib (GDC-0980) resulted in a partial response in a patient with malignant pleural mesothelioma harboring PIK3CA R88Q (PMID: 26787751; NCT00854152). | 26787751 |
PIK3CA R88Q | high grade glioma | sensitive | PI3K Inhibitor (Pan) | Buparlisib + Selumetinib | Preclinical - Cell culture | Actionable | In a preclinical study, the combination therapy of Buparlisib (BKM120) and Koselugo (selumetinib) led to a synergistic effect, resulting in greater growth inhibition of astrocytoma cells expressing PIK3CA R88Q than cells with wild-type PIK3CA in culture (PMID: 29975751). | 29975751 |
PIK3CA R88Q | tonsil squamous cell carcinoma | predicted - sensitive | PIK3CA inhibitor | Alpelisib + Tipifarnib | Case Reports/Case Series | Actionable | In a Phase I/II trial (KURRENT-HN), the combination of Piqray (alpelisib) and Zarnestra (tipifarnib) resulted in a partial response with an 84% reduction in the target lesions and a complete response in the lung in a patient with metastatic squamous cell carcinoma of the tonsil harboring PIK3CA R88Q, with response ongoing at 27 weeks (PMID: 37339176; NCT04997902). | 37339176 |