Gene Variant Detail

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Gene PIK3CA
Variant E545K
Impact List missense
Protein Effect gain of function
Gene Variant Descriptions PIK3CA E545K is a hotspot mutation that lies within the PIK helical domain of the Pik3ca protein (UniProt.org). E545K results in increased phosphorylation of Akt and Mek1/2, growth factor-independent cell survival, and is transforming in culture (PMID: 26627007, PMID: 29533785).
Associated Drug Resistance
Category Variants Paths

PIK3CA mutant PIK3CA act mut PIK3CA E545K

PIK3CA mutant PIK3CA exon10 PIK3CA E545X PIK3CA E545K

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Transcript NM_006218.4
gDNA chr3:g.179218303G>A
cDNA c.1633G>A
Protein p.E545K
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
XM_011512894 chr3:g.179218303G>A c.1633G>A p.E545K RefSeq GRCh38/hg38
XM_006713658.4 chr3:g.179218303G>A c.1633G>A p.E545K RefSeq GRCh38/hg38
XM_006713658.5 chr3:g.179218303G>A c.1633G>A p.E545K RefSeq GRCh38/hg38
NM_006218 chr3:g.179218303G>A c.1633G>A p.E545K RefSeq GRCh38/hg38
XM_011512894.2 chr3:g.179218303G>A c.1633G>A p.E545K RefSeq GRCh38/hg38
XM_006713658 chr3:g.179218303G>A c.1633G>A p.E545K RefSeq GRCh38/hg38
NM_006218.3 chr3:g.179218303G>A c.1633G>A p.E545K RefSeq GRCh38/hg38
NM_006218.4 chr3:g.179218303G>A c.1633G>A p.E545K RefSeq GRCh38/hg38

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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
PIK3CA E545K lung non-small cell carcinoma sensitive Copanlisib + Paclitaxel Preclinical - Pdx Actionable In a preclinical study, Aliqopa (copanlisib), in combination with Taxol (paclitaxel), induced tumor regression in PIK3CA E545K-mutant patient-derived non-small cell lung cancer xenografts (PMID: 24170767). 24170767
PIK3CA E545K Advanced Solid Tumor sensitive Sirolimus Preclinical Actionable In a preclinical study, Rapamune (sirolimus) demonstrated efficacy in inhibiting transformation of cultured cells containing PIK3CA E545K mutations (PMID: 15647370). 15647370
PIK3CA E545K gastrointestinal system cancer sensitive Capivasertib Preclinical - Cell culture Actionable In a preclinical study, gastric cancer cells harboring PIK3CA E545K demonstrated sensitivity to the AKT inhibitor Truqap (capivasertib), resulting in decreased proliferation in culture (PMID: 24088382). 24088382
PIK3CA E545K breast cancer sensitive Everolimus Preclinical Actionable In a preclinical study, breast cancer cell lines harboring a PIK3CA E545K mutation had increased sensitivity to Afinitor (everolimus) in culture (PMID: 20664172). 20664172
PIK3CA E545K colorectal cancer sensitive Dactolisib Preclinical Actionable In a preclinical study, BEZ235 decreased cell proliferation in colorectal cancer cells harboring a PIK3CA E545K mutation in cell culture (PMID: 21966435). 21966435
PIK3CA E545K Advanced Solid Tumor sensitive Alpelisib Preclinical - Pdx Actionable In a preclinical study, Alpelisib (BYL719) inhibited PIK3CA E545K and showed anti-tumor activity in patient-derived xenograft models harboring a PIK3CA E545K mutation (PMID: 24608574). 24608574
PIK3CA E545K head and neck squamous cell carcinoma sensitive Rigosertib Sodium Preclinical - Pdx Actionable In a preclinical study, head and neck squamous cell carcinoma patient-derived xenograft models harboring a PIK3CA E545K mutation demonstrated increased sensitivity to Rigosertib (ON 01910.Na) (PMID: 23873848). 23873848
PIK3CA E545K Advanced Solid Tumor resistant A66 Preclinical Actionable In a preclinical study, cancer cell lines harboring PIK3CA E545K did not demonstrate sensitivity to A66 in culture, in contrast with cells harboring PIK3CA H1047R (PMID: 21668414). 21668414
PIK3CA E545K esophagus squamous cell carcinoma sensitive LY294002 Preclinical Actionable In a preclinical study, LY294002 inhibited cell proliferation of esophagus squamous cell carcinoma cells expressing PIK3CA E545K (PMID: 18262558). 18262558
PIK3CA E545K cervical cancer sensitive PW12 Preclinical Actionable In a preclinical study, PW12 inhibited proliferation of cervical cancer cells with a PIK3CA E545K mutation (PMID: 22391131). 22391131
PIK3CA E545K breast cancer sensitive WYE-125132 Preclinical Actionable In a preclinical study, WYE-125132 inhibited proliferation of breast cancer cells with a PIK3CA E545K mutation (PMID: 20068177). 20068177
PIK3CA E545K breast cancer sensitive MEN1611 Preclinical Actionable In a preclinical study, MEN1611 (CH5132799) inhibited proliferation of breast cancer cells expressing PIK3CA E545K (PMID: 21558396). 21558396
PIK3CA E545K ovarian cancer sensitive MEN1611 Preclinical Actionable In a preclinical study, MEN1611 (CH5132799) inhibited proliferation of ovarian cancer cells harboring PIK3CA E545K in culture (PMID: 21558396). 21558396
PIK3CA E545K breast cancer sensitive Gedatolisib Preclinical Actionable In a preclinical study, Gedatolisib (PKI-587) inhibited growth of human breast cancer cells harboring PIK3CA E545K in culture (PMID: 21325073, PMID: 17314276). 17314276 21325073
PIK3CA E545K colorectal cancer sensitive Cetuximab + Irinotecan Case Reports/Case Series Actionable In a retrospective analysis, treatment with the combination of Erbitux (cetuximab) and Camptosar (irinotecan) resulted in stable disease in 50% (1/2) and 14 months without evidence of disease in 50% (1/2) of colorectal carcinoma patients harboring a PIK3CA E545K mutation (PMID: 25714871). 25714871
PIK3CA E545K breast cancer sensitive Dactolisib Preclinical Actionable In a preclinical study, BEZ235 inhibited survival of transformed breast epithelial cell lines overexpressing PIK3CA E545K in culture (PMID: 26627007). 26627007
PIK3CA E545K breast cancer sensitive Alpelisib Preclinical - Cell culture Actionable In a preclinical study, Alpelisib (BYL719) inhibited survival of transformed breast epithelial cell lines overexpressing PIK3CA E545K in culture (PMID: 26627007). 26627007
PIK3CA E545K breast cancer sensitive MK2206 Preclinical Actionable In a preclinical study, MK2206 inhibited survival of transformed breast epithelial cell lines overexpressing PIK3CA E545K in culture (PMID: 26627007). 26627007
PIK3CA E545K breast cancer sensitive MK2206 Preclinical - Cell culture Actionable In a preclinical study, MK2206 treatment inhibited Akt signaling, induced cell death, and inhibited proliferation of breast cancer cell lines harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive Lapatinib Preclinical Actionable In a preclinical study, Tykerb (lapatinib) inhibited survival of transformed breast epithelial cell lines overexpressing PIK3CA E545K in culture (PMID: 26627007). 26627007
PIK3CA E545K breast cancer sensitive Neratinib Preclinical Actionable In a preclinical study, Nerlynx (neratinib) inhibited survival of transformed breast epithelial cell lines overexpressing PIK3CA E545K in culture (PMID: 26627007). 26627007
PIK3CA E545K breast cancer sensitive Trametinib Preclinical Actionable In a preclinical study, Mekinist (trametinib) inhibited survival of transformed breast epithelial cell lines overexpressing PIK3CA E545K in culture (PMID: 26627007). 26627007
PIK3CA E545K Advanced Solid Tumor sensitive Trametinib Preclinical Actionable In a preclinical study, Mekinist (trametinib) inhibited survival of transformed cell lines overexpressing PIK3CA E545K in culture (PMID: 26627007). 26627007
PIK3CA E545K estrogen-receptor positive breast cancer sensitive AZD8835 Preclinical Actionable In a preclinical study, AZD8835 inhibited proliferation of estrogen receptor (ER)-positive breast cancer cells harboring PIK3CA E545K in culture and suppressed tumor growth in xenograft models (PMID: 26839307). 26839307
PIK3CA E545K breast cancer sensitive PKI-402 Preclinical - Cell line xenograft Actionable In a preclinical study, treatment with PKI-402 resulted in decreased Akt phosphorylation and tumor regression in ERBB2 (HER2)-positive breast cancer cell line xenograft models harboring PIK3CA E545K (PMID: 20371716). 20371716
PIK3CA E545K head and neck squamous cell carcinoma predicted - sensitive Apitolisib Case Reports/Case Series Actionable In a Phase I trial, Apitolisib (GDC-0980) treatment resulted in an unconfirmed partial response in a patient with head and neck squamous cell carcinoma harboring PIK3CA E545K (PMID: 26787751; NCT00854152). 26787751
PIK3CA E545K ovarian clear cell carcinoma predicted - sensitive Apitolisib Case Reports/Case Series Actionable In a Phase I trial, Apitolisib (GDC-0980) treatment resulted in tumor regression by 48.3% in a patient with ovarian clear cell carcinoma harboring PIK3CA E545K, who remained on treatment for 282 days (PMID: 26787751; NCT00854152). 26787751
PIK3CA E545K breast carcinoma sensitive XL147 Preclinical - Cell line xenograft Actionable In a preclinical study, XL147 inhibited PI3K signaling and proliferation of a human breast carcinoma cell line harboring PIK3CA E545K in culture and inhibited tumor growth in xenograft models (PMID: 25637314). 25637314
PIK3CA E545K lung squamous cell carcinoma sensitive Buparlisib Preclinical - Cell culture Actionable In a preclinical study, Buparlisib (BKM120) induced apoptosis, inhibited cell proliferation, migration, and invasion of lung squamous cell carcinoma cells over expressing PIK3CA E545K in culture (PMID: 26013318). 26013318
PIK3CA E545K lung squamous cell carcinoma sensitive Dactolisib Preclinical - Cell culture Actionable In a preclinical study, BEZ235 induced apoptosis, inhibited cell proliferation, migration, and invasion of lung squamous cell carcinoma cells over expressing PIK3CA E545K in culture (PMID: 26013318). 26013318
PIK3CA E545K lung squamous cell carcinoma sensitive Alpelisib Preclinical - Cell culture Actionable In a preclinical study, Alpelisib (BYL719) induced apoptosis, inhibited cell proliferation, migration, and invasion of lung squamous cell carcinoma cells over expressing PIK3CA E545K in culture (PMID: 26013318). 26013318
PIK3CA E545K thyroid cancer sensitive MK2206 Preclinical - Cell culture Actionable In a preclinical study, expression of PIK3CA E545K in a thyroid cancer cell line resulted in increased sensitivity to MK2206 in culture (PMID: 21289267). 21289267
PIK3CA E545K Advanced Solid Tumor sensitive Rigosertib Sodium Preclinical - Cell culture Actionable In a preclinical study, Rigosertib (ON 01910.Na) inhibited oncogenic transformation in fibroblast cells over-expressing PIK3CA E545K in culture (PMID: 27104980). 27104980
PIK3CA E545K breast cancer sensitive BAY1125976 Preclinical - Cell line xenograft Actionable In a preclinical study, BAY1125976 inhibited proliferation of a breast cancer cell line harboring PIK3CA E545K in culture, and inhibited AKT signaling and tumor growth in xenograft models (PMID: 27699769). 27699769
PIK3CA E545K leukemia sensitive LY3023414 Preclinical Actionable In a preclinical study, LY3023414 inhibited tumor growth in a transgenic animal model of leukemia driven by PIK3CA E545K (PMID: 27439478). 27439478
PIK3CA E545K breast cancer no benefit Dactolisib + Venetoclax Preclinical - Cell culture Actionable In a preclinical study, inhibition of Pi3k signaling by BEZ235 did not sensitize breast cancer cell lines harboring PIK3CA E545K to Venclexta (venetoclax) in culture (PMID: 27974663). 27974663
PIK3CA E545K 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 E545K to WEHI-539 in culture (PMID: 27974663). 27974663
PIK3CA E545K breast cancer sensitive Miransertib Preclinical - Cell culture Actionable In a preclinical study, Miransertib (ARQ092) treatment inhibited Akt signaling, induced cell death, and inhibited proliferation of breast cancer cell lines harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive Miransertib Preclinical - Cell culture Actionable In a preclinical study, treatment with Miransertib (ARQ092) resulted in growth inhibition in hormone receptor positive breast cancer cells harboring PIK3CA E545K in culture (PMID: 26469692). 26469692
PIK3CA E545K breast cancer sensitive ARQ 751 Preclinical - Cell culture Actionable In a preclinical study, a breast cancer cell line harboring PIK3CA E545K was sensitive to ARQ 751 in culture, demonstrating inhibition of cell growth (PMID: 26469692). 26469692
PIK3CA E545K breast cancer sensitive ARQ 751 Preclinical - Cell culture Actionable In a preclinical study, ARQ 751 treatment inhibited Akt signaling, induced cell death, and inhibited proliferation of breast cancer cell lines harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K colon cancer predicted - sensitive LY2780301 Case Reports/Case Series Actionable In a Phase I trial, a colon cancer patient harboring PIK3CA E545K was sensitive to LY2780301, demonstrating stable disease for approximately 125 days (PMID: 25902900). 25902900
PIK3CA E545K breast cancer sensitive DHM25 Preclinical - Cell culture Actionable In a preclinical study, DHM25 increased cell death in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 26237138). 26237138
PIK3CA E545K breast cancer sensitive Voxtalisib Preclinical - Cell line xenograft Actionable In a preclinical study, a breast cancer cell line harboring PIK3CA E545K was sensitive to XL765 (SAR245409), demonstrating inhibition of cell proliferation and colony formation in culture, and inhibition of tumor growth in cell line xenograft models (PMID: 24634413). 24634413
PIK3CA E545K colorectal cancer resistant Cetuximab + Fluorouracil Preclinical - Cell culture Actionable In a preclinical study, colorectal cancer cells over expressing PIK3CA E545K were resistant to Erbitux (cetuximab) and Fluorouracil combination treatment in culture (PMID: 28424201). 28424201
PIK3CA E545K head and neck squamous cell carcinoma predicted - sensitive Carboplatin + Paclitaxel + Temsirolimus Case Reports/Case Series Actionable In a Phase II trial, a patient with head and neck squamous cell carcinoma harboring PIK3CA E545K demonstrated a partial response when treated with the combination of Torisel (temsirolimus), Paraplatin (carboplatin), and Taxol (paclitaxel) (PMID: 28961834). 28961834
PIK3CA E545K Klatskin's tumor 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; harboring PIK3CA E545K), 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 E545K urinary bladder cancer sensitive Pictilisib Preclinical - Cell culture Actionable In a preclinical study, Pictilisib (GDC-0941) inhibited Akt phosphorylation, resulted in growth inhibition in bladder cancer cells harboring PIK3CA E545K in culture (PMID: 28808038). 28808038
PIK3CA E545K urinary bladder cancer sensitive Cisplatin + Pictilisib Preclinical - Cell culture Actionable In a preclinical study, Pictilisib (GDC-0941) and Platinol (cisplatin) synergistically inhibited Akt phosphorylation and growth of bladder cancer cells harboring PIK3CA E545K in culture (PMID: 28808038). 28808038
PIK3CA E545K urinary bladder cancer sensitive Gemcitabine + Pictilisib Preclinical - Cell culture Actionable In a preclinical study, Pictilisib (GDC-0941) and Gemzar (gemcitabine) synergistically inhibited Akt phosphorylation and growth of bladder cancer cells harboring PIK3CA E545K in culture (PMID: 28808038). 28808038
PIK3CA E545K urinary bladder cancer sensitive Pictilisib + Sorafenib Preclinical - Cell culture Actionable In a preclinical study, Pictilisib (GDC-0941) and Nexavar (sorafenib) synergistically decreased Erk and Akt phosphorylation, inhibited survival of bladder cancer cells harboring PIK3CA E545K in culture (PMID: 28808038). 28808038
PIK3CA E545K breast cancer resistant Buparlisib Preclinical - Cell culture Actionable In a preclinical study, breast cancer cells expressing PIK3CA E545K demonstrated resistance to treatment with Buparlisib (BKM120) in culture (PMID: 29636477). 29636477
PIK3CA E545K lung squamous cell carcinoma no benefit Taselisib Case Reports/Case Series Actionable In a Phase I (SWOG S1400B) trial, Taselisib (GDC-0032) treatment did not meet its primary endpoint for response rate in patients with lung squamous cell carcinoma harboring PIK3CA mutations, resulting in only 1 response of 11 patients harboring PIK3CA E545K (PMID: 31158500; NCT02785913). 31158500
PIK3CA E545K breast cancer predicted - sensitive CYH33 Preclinical - Cell culture Actionable In a preclinical study, CYH33 inhibited proliferation of a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 30003928). 30003928
PIK3CA E545K Her2-receptor negative breast cancer no benefit Everolimus Phase III Actionable In a retrospective analysis of a Phase III trial (BOLERO-2), Afinitor (everolimus) demonstrated comparable progression-free survival benefit in patients with hormone receptor-positive, Erbb2 (Her2)-negative breast cancer harboring wild-type (HR=0.43) or mutant (HR=0.37) PIK3CA, similar benefit was observed in subgroups harboring PIK3CA H1047R (HR=0.37) and PIK3CA E545K/E542K (HR=0.30) (PMID: 28183140; NCT00863655). 28183140
PIK3CA E545K breast cancer sensitive Borussertib Preclinical - Cell culture Actionable In a preclinical study, borussertib inhibited AKT signaling and proliferation of a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 30858154). 30858154
PIK3CA E545K stomach cancer sensitive Capivasertib Preclinical - Cell culture Actionable In a preclinical study, a gastric cancer cell line harboring PIK3CA E545K was sensitive to treatment with Truqap (capivasertib), demonstrating decreased cell proliferation in culture (PMID: 32070411). 32070411
PIK3CA E545K breast cancer sensitive Ipatasertib Preclinical - Cell line xenograft Actionable In a preclinical study, Ipatasertib (GDC-0068) reduced tumor growth in a cell line xenograft model of hormone-receptor positive breast cancer harboring PIK3CA E545K (PMID: 32205017). 32205017
PIK3CA E545K breast cancer sensitive Ipatasertib Preclinical - Cell culture Actionable In a preclinical study, Ipatasertib (GDC-0068) treatment inhibited Akt signaling, induced cell death, and inhibited proliferation of breast cancer cell lines harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive Ipatasertib + Paclitaxel Preclinical - Cell line xenograft Actionable In a preclinical study, the combination of Ipatasertib (GDC-0068) and Taxol (paclitaxel) inhibited tumor growth in a cell line xenograft model of hormone-receptor positive breast cancer harboring PIK3CA E545K, and demonstrated increased activity over either agent alone (PMID: 32205017). 32205017
PIK3CA E545K lung non-small cell carcinoma sensitive T-2143 Preclinical - Cell line xenograft Actionable In a preclinical study, T-2143 treatment reduced proliferation of non-small cell lung cancer cells harboring PIK3CA E545K in culture, and inhibited tumor growth in a cell line xenograft model (PMID: 32499300). 32499300
PIK3CA E545K ovarian cancer predicted - sensitive TAS-117 Case Reports/Case Series Actionable In a Phase II trial, TAS-117 treatment in an ovarian cancer patient harboring PIK3CA E545K led to a partial response at 6 weeks after treatment and a 39% decrease in tumor size, but subsequently progression was observed at 12 weeks in non-target lesions and an increase in tumor markers at 18 weeks, and TAS-117 treatment was discontinued (PMID: 33723724; NCT03017521). 33723724
PIK3CA E545K breast cancer sensitive GSK690693 Preclinical - Cell culture Actionable In a preclinical study, GSK690693 treatment inhibited Akt signaling, induced cell death, and inhibited proliferation of breast cancer cell lines harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive AZD0156 + MK2206 Preclinical - Cell culture Actionable In a preclinical study, AZD0156 and MK2206 combination treatment increased cell death compared to MK2206 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive ARQ 751 + AZD0156 Preclinical - Cell culture Actionable In a preclinical study, AZD0156 and ARQ 751 combination treatment increased cell death compared to ARQ 751 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive AZD0156 + Miransertib Preclinical - Cell culture Actionable In a preclinical study, AZD0156 and Miransertib (ARQ092) combination treatment increased cell death compared to Miransertib (ARQ092) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive AZD0156 + GSK690693 Preclinical - Cell culture Actionable In a preclinical study, AZD0156 and GSK690693 combination treatment increased cell death compared to GSK690693 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive AZD0156 + Ipatasertib Preclinical - Cell culture Actionable In a preclinical study, AZD0156 and Ipatasertib (GDC-0068) combination treatment increased cell death compared to Ipatasertib (GDC-0068) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive Ipatasertib + KU-57788 Preclinical - Cell culture Actionable In a preclinical study, KU-57788 and Ipatasertib (GDC-0068) combination treatment increased cell death compared to Ipatasertib (GDC-0068) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive KU-57788 + MK2206 Preclinical - Cell culture Actionable In a preclinical study, KU-57788 and MK2206 combination treatment increased cell death compared to MK2206 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive ARQ 751 + KU-57788 Preclinical - Cell culture Actionable In a preclinical study, KU-57788 and ARQ 751 combination treatment increased cell death compared to ARQ 751 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive KU-57788 + Miransertib Preclinical - Cell culture Actionable In a preclinical study, KU-57788 and Miransertib (ARQ092) combination treatment increased cell death compared to Miransertib (ARQ092) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive GSK690693 + KU-57788 Preclinical - Cell culture Actionable In a preclinical study, KU-57788 and GSK690693 combination treatment increased cell death compared to GSK690693 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive GSK2334470 + MK2206 Preclinical - Cell culture Actionable In a preclinical study, GSK2334470 and MK2206 combination treatment increased cell death compared to MK2206 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive ARQ 751 + GSK2334470 Preclinical - Cell culture Actionable In a preclinical study, GSK2334470 and ARQ 751 combination treatment increased cell death compared to ARQ 751 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive GSK2334470 + GSK690693 Preclinical - Cell culture Actionable In a preclinical study, GSK2334470 and GSK690693 combination treatment increased cell death compared to GSK690693 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive GSK2334470 + Miransertib Preclinical - Cell culture Actionable In a preclinical study, GSK2334470 and Miransertib (ARQ092) combination treatment increased cell death compared to Miransertib (ARQ092) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive GSK2334470 + Ipatasertib Preclinical - Cell culture Actionable In a preclinical study, GSK2334470 and Ipatasertib (GDC0068) combination treatment increased cell death compared to Ipatasertib (GDC0068) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive Ipatasertib + OSU-T315 Preclinical - Cell culture Actionable In a preclinical study, OSU-T315 and Ipatasertib (GDC0068) combination treatment increased cell death compared to Ipatasertib (GDC0068) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive MK2206 + OSU-T315 Preclinical - Cell culture Actionable In a preclinical study, OSU-T315 and MK2206 combination treatment increased cell death compared to MK2206 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive ARQ 751 + OSU-T315 Preclinical - Cell culture Actionable In a preclinical study, OSU-T315 and ARQ 751combination treatment increased cell death compared to ARQ 751 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive Miransertib + OSU-T315 Preclinical - Cell culture Actionable In a preclinical study, OSU-T315 and Miransertib (ARQ092) combination treatment increased cell death compared to Miransertib (ARQ092) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive GSK690693 + OSU-T315 Preclinical - Cell culture Actionable In a preclinical study, OSU-T315 and GSK690693 combination treatment increased cell death compared to GSK690693 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer decreased response ARQ 751 + LAM-002A Preclinical - Cell culture Actionable In a preclinical study, LAM-002A (Apilimod dimesylate) and ARQ 751 combination treatment resulted in less cell death compared to ARQ 751 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer decreased response LAM-002A + MK2206 Preclinical - Cell culture Actionable In a preclinical study, LAM-002A (Apilimod dimesylate) and MK2206 combination treatment resulted in less cell death compared to MK2206 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive MK2206 + Sirolimus Preclinical - Cell culture Actionable In a preclinical study, Rapamune (sirolimus) and MK2206 combination treatment increased cell death compared to MK2206 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive ARQ 751 + Sirolimus Preclinical - Cell culture Actionable In a preclinical study, Rapamune (sirolimus) and ARQ 751 combination treatment increased cell death compared to ARQ 751 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive Miransertib + Sirolimus Preclinical - Cell culture Actionable In a preclinical study, Rapamune (sirolimus) and Miransertib (ARQ092) combination treatment increased cell death compared to Miransertib (ARQ092) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive GSK690693 + Sirolimus Preclinical - Cell culture Actionable In a preclinical study, Rapamune (sirolimus) and GSK690693 combination treatment increased cell death compared to GSK690693 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive Ipatasertib + Sirolimus Preclinical - Cell culture Actionable In a preclinical study, Rapamune (sirolimus) and Ipatasertib (GDC0068) combination treatment increased cell death compared to Ipatasertib (GDC0068) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive MK2206 + Torin 1 Preclinical - Cell culture Actionable In a preclinical study, Torin 1 and MK2206 combination treatment increased cell death compared to MK2206 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive ARQ 751 + Torin 1 Preclinical - Cell culture Actionable In a preclinical study, Torin 1 and ARQ 751 combination treatment increased cell death compared to ARQ 751 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive Miransertib + Torin 1 Preclinical - Cell culture Actionable In a preclinical study, Torin 1 and Miransertib (ARQ092) combination treatment increased cell death compared to Miransertib (ARQ092) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive GSK690693 + Torin 1 Preclinical - Cell culture Actionable In a preclinical study, Torin 1 and GSK690693 combination treatment increased cell death compared to GSK690693 alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K breast cancer sensitive Ipatasertib + Torin 1 Preclinical - Cell culture Actionable In a preclinical study, Torin 1 and Ipatasertib (GDC0068) combination treatment increased cell death compared to Ipatasertib (GDC0068) alone in a breast cancer cell line harboring PIK3CA E545K in culture (PMID: 32439931). 32439931
PIK3CA E545K colon cancer sensitive Taselisib Preclinical - Cell culture Actionable In a preclinical study, Taselisib (GDC-0032) treatment led to decreased cell viability in a colon cancer cell line expressing PIK3CA E545K in culture (PMID: 34544753). 34544753
PIK3CA E545K colon cancer no benefit Pictilisib Preclinical - Cell culture Actionable In a preclinical study, Pictilisib (GDC-0941) treatment did not affect cell viability in a colon cancer cell line expressing PIK3CA E545K in culture (PMID: 34544753). 34544753
PIK3CA E545K colon cancer sensitive Inavolisib Preclinical - Cell culture Actionable In a preclinical study, Inavolisib (GDC-0077) treatment led to decreased cell viability in a colon cancer cell line expressing PIK3CA E545K in culture (PMID: 34544753). 34544753
PIK3CA E545K breast cancer sensitive Inavolisib Preclinical - Cell line xenograft Actionable In a preclinical study, Inavolisib (GDC-0077) treatment led to tumor regression in an ESR1 (ER)-positive breast cancer cell line xenograft model harboring PIK3CA E545K (PMID: 34544753). 34544753
PIK3CA E545K cervical cancer predicted - sensitive Alpelisib Case Reports/Case Series Actionable In a Phase I trial, treatment with Piqray (alpelisib) resulted in an objective response rate of 33% (2/6; all partial responses), disease control rate of 100% (6/6), with stable disease in 5 patients, in cervical cancer patients harboring PIK3CA mutations, including PIK3CA E545K (PMID: 35311394). 35311394
PIK3CA E545K cervical cancer predicted - sensitive Alpelisib Preclinical - Cell line xenograft Actionable In a preclinical study, Piqray (alpelisib) increased apoptosis and decreased colony formation in a cervical cancer cell line harboring PIK3CA E545K in culture and decreased tumor cell proliferation and increased CD8-positive T-cell differentiation and proliferation in a cell line xenograft model (PMID: 37469254). 37469254
PIK3CA E545K breast cancer sensitive Sirolimus Preclinical - Cell culture Actionable In a preclinical study, a breast cancer cell line harboring PIK3CA E545K demonstrated hypersensitivity to Rapamune (sirolimus)-induced growth inhibition in culture (PMID: 24631838). 24631838
PIK3CA E545K estrogen-receptor positive breast cancer predicted - sensitive Alpelisib + Everolimus Preclinical - Patient cell culture Actionable In a preclinical study, combination treatment with Piqray (albelisib) and Afinitor (everolimus) inhibited cell viability of patient-derived ESR1 (ER)-positive breast cancer cells harboring PIK3CA E545K in culture (PMID: 36900375). 36900375
PIK3CA E545K estrogen-receptor positive breast cancer predicted - sensitive Afatinib + Alpelisib Preclinical - Patient cell culture Actionable In a preclinical study, combination treatment with Piqray (albelisib) and Gilotrif (afatinib) synergistically inhibited cell viability of patient-derived ESR1 (ER)-positive breast cancer cells harboring PIK3CA E545K in culture (PMID: 36900375). 36900375
PIK3CA E545K diffuse midline glioma, H3 K27M-mutant sensitive Trametinib Preclinical - Cell culture Actionable In a preclinical study, Mekinist (trametinib) inhibited viability of mouse glioma cells expressing H3.1 K28M (reported as H3.1 K27M), ACVR1 G328V, and PIK3CA E545K in culture (PMID: 37011011). 37011011
PIK3CA E545K urinary bladder cancer sensitive MK2206 Preclinical - Cell line xenograft Actionable In a preclinical study, MK2206 increased apoptosis and inhibited viability in bladder cancer cell lines harboring PIK3CA E545K in culture and inhibited tumor growth in cell line xenograft models (PMID: 25349966). 25349966
PIK3CA E545K clear cell adenocarcinoma predicted - sensitive Copanlisib Case Reports/Case Series Actionable In a Phase II trial (NCI MATCH EAY131-Z1F), Aliqopa (copanlisib) treatment resulted in a partial response and progression-free survival of 7.3 months and an overall survival of 19.8 months in a patient with clear cell carcinoma of anterior abdominal wall harboring PIK3CA E545K (PMID: 35133871; NCT02465060). 35133871
PIK3CA E545K cervical cancer predicted - sensitive Pembrolizumab Case Reports/Case Series Actionable In a clinical case study, Keytruda (pembrolizumab) treatment resulted in complete remission in a patient with metastatic cervical cancer harboring PIK3CA E545K and moderate tumor mutational burden (TMB) (9.2 mut/Mb) (PMID: 37469254). 37469254
PIK3CA E545K cervical cancer sensitive Alpelisib + Toripalimab-tpzi Preclinical - Pdx Actionable In a preclinical study, the combination of Piqray (alpelisib) and Loqtorz (toripalimab-tpzi) inhibited proliferation in cell line xenograft models of cervical cancer harboring PIK3CA E545K and in a patient-derived xenograft (PDX) model (PMID: 37469254). 37469254
PIK3CA E545K head and neck squamous cell carcinoma sensitive Alpelisib + Tipifarnib Preclinical - Pdx Actionable In a preclinical study, the combination of Piqray (alpelisib) and Zarnestra (tipifarnib) inhibited tumor growth in a patient-derived xenograft (PDX) model of head and neck squamous cell carcinoma harboring PIK3CA E545K (PMID: 37339176). 37339176
PIK3CA E545K stomach cancer sensitive Alpelisib Preclinical - Cell culture Actionable In a preclinical study, Piqray (alpelisib) inhibited growth and induced cell cycle arrest and inhibited phosphorylation of Akt and S6 in a gastric cancer cell line harboring PIK3CA E545K in culture (PMID: 37493631). 37493631
PIK3CA E545K stomach cancer sensitive A-1331852 + Alpelisib Preclinical - Cell culture Actionable In a preclinical study, the combination of Piqray (alpelisib) and A-1331852 synergistically inhibited viability in a gastric cancer cell line harboring PIK3CA E545K in culture (PMID: 37493631). 37493631
PIK3CA E545K head and neck squamous cell carcinoma sensitive STX-478 Preclinical - Pdx Actionable In a preclinical study, STX-478 inhibited tumor growth of a head and neck squamous cell cancer patient-derived xenograft (PDX) model harboring PIK3CA E545K (PMID: 37623743). 37623743
PIK3CA E545K Her2-receptor negative breast cancer predicted - sensitive HS-10352 Case Reports/Case Series Actionable In a Phase I trial, HS-10352 treatment resulted in an objective response rate (ORR) of 27.8% (5/18, all partial responses), disease control rate (DCR) of 55.6%, and median progression-free survival (mPFS) of 3.9 mo in HR-positive, ERBB2 (HER2)-negative advanced breast cancer patients overall, and in the 6mg group led to an ORR of 66.7% and DCR of 83.3%, with an ORR of 75.0% (3/4) and DCR of 100% in patients with PIK3CA mutations (E542K, E545K, E545D, H1047L, H1047R) (PMID: 38037839; NCT04631835). 38037839
PIK3CA E545K breast cancer sensitive RLY-2608 Preclinical - Cell line xenograft Actionable In a preclinical study, RLY-2608 inhibited proliferation of hormone receptor-positive breast cancer cells harboring PIK3CA E545K in culture, and led to tumor regression in a cell line xenograft model (PMID: 37916956). 37916956