PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 26245675-8 2015 For patients receiving trastuzumab plus lapatinib, the probability of pCR was higher in PIK3CA wild-type tumors (48.4% vs. 12.5%; p = .06). Lapatinib 40-49 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 88-94 29701763-0 2018 PIK3CA mutations are associated with reduced pathological complete response rates in primary HER2-positive breast cancer: pooled analysis of 967 patients from five prospective trials investigating lapatinib and trastuzumab. Lapatinib 197-206 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 0-6 28478451-0 2017 Role of HER2-Related Biomarkers (HER2, p95HER2, HER3, PTEN, and PIK3CA) in the Efficacy of Lapatinib plus Capecitabine in HER2-Positive Advanced Breast Cancer Refractory to Trastuzumab. Lapatinib 91-100 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 64-70 29110152-0 2018 Low PTEN levels and PIK3CA mutations predict resistance to neoadjuvant lapatinib and trastuzumab without chemotherapy in patients with HER2 over-expressing breast cancer. Lapatinib 71-80 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 20-26 27177864-0 2016 PIK3CA mutations are associated with reduced pathological complete response rates in primary HER2-positive breast cancer: pooled analysis of 967 patients from five prospective trials investigating lapatinib and trastuzumab. Lapatinib 197-206 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 0-6 26920887-8 2016 PIK3CA mutations were associated with shorter median PFS (mutant vs. wild type: 4.3 vs. 6.4 months) and OS (17.3 vs. 27.8 months) in capecitabine plus lapatinib-treated patients, but not in T-DM1-treated patients (PFS, 10.9 vs. 9.8 months; OS, not reached in mutant or wild type). Lapatinib 151-160 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 0-6 25199759-11 2014 In patients with PIK3CA mutation, the pCR rates were 16%, 24.3%, and 17.4% with lapatinib, trastuzumab, and the combination, respectively (P = .654) and in the wild-type group, they were 18.2%, 33.%, and 37.1%, respectively (P = .017). Lapatinib 80-89 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 17-23 26281684-2 2015 PIK3CA mutations are the predictive markers for anti-EGFR antibodies, trastuzumab, and lapatinib. Lapatinib 87-96 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 0-6 25559818-5 2015 Patients treated with a combination of trastuzumab and lapatinib who had wild-type PIK3CA obtained a total pathologic complete response (pCR) rate of 53.1%, which decreased to 28.6% in patients with tumors that carried PIK3CA activating mutations (P = .012). Lapatinib 55-64 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 83-89 25559818-5 2015 Patients treated with a combination of trastuzumab and lapatinib who had wild-type PIK3CA obtained a total pathologic complete response (pCR) rate of 53.1%, which decreased to 28.6% in patients with tumors that carried PIK3CA activating mutations (P = .012). Lapatinib 55-64 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 219-225 26181325-3 2015 We observed that combinations of lapatinib plus AKTi were synergistic in HER2(+)/PIK3CA(mut) cell lines but not in HER2(+)/PIK3CA(wt) cell lines. Lapatinib 33-42 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 81-87 26181325-5 2015 This revealed that p-S6RP levels were less well attenuated by lapatinib in HER2(+)/PIK3CA(mut) cells compared to HER2(+)/PIK3CAwt cells and that lapatinib + AKTi reduced p-S6RP levels to those achieved in HER2(+)/PIK3CA(wt) cells with lapatinib alone. Lapatinib 62-71 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 83-89 26181325-6 2015 We also found that that compensatory up-regulation of p-HER3 and p-HER2 is blunted in PIK3CA(mut) cells following lapatinib + AKTi treatment. Lapatinib 114-123 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 86-92 26181325-8 2015 We used a nonlinear ordinary differential equation model to support the idea that PIK3CA mutations act as downstream activators of AKT that blunt lapatinib inhibition of downstream AKT signaling and that the effects of PIK3CA mutations can be countered by combining lapatinib with an AKTi. Lapatinib 146-155 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 82-88 25195596-6 2014 We validated the top ranking genes, i.e., PIK3CA and PIK3CB, by showing that their forced expression confers resistance to lapatinib in vitro and found that their mutation/overexpression is associated to poor prognosis in human breast tumors. Lapatinib 123-132 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 42-48 25056500-7 2014 In the PIK3CA wild-type subgroup, lapatinib plus paclitaxel reduced risk of progression compared with paclitaxel alone (HR = 0.44; 95% CI: 0.28, 0.69; P <0.0001); progression-free survival (PFS) was not significantly improved within the PIK3CA mutation subgroup (P = 0.179). Lapatinib 34-43 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 7-13 25056500-7 2014 In the PIK3CA wild-type subgroup, lapatinib plus paclitaxel reduced risk of progression compared with paclitaxel alone (HR = 0.44; 95% CI: 0.28, 0.69; P <0.0001); progression-free survival (PFS) was not significantly improved within the PIK3CA mutation subgroup (P = 0.179). Lapatinib 34-43 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 240-246 24590635-14 2014 Our secondary end point findings of a significant correlation between PIK3CA mutation and response to letrozole-lapatinib in HR-positive/HER2-negative early breast cancer must now be independently confirmed. Lapatinib 112-121 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 70-76 21499301-6 2011 The pro-apoptotic effect of lapatinib was less pronounced in cells with a PIK3CA mutation than in those without one. Lapatinib 28-37 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 74-80 23633485-7 2013 However, the p110alpha-specific inhibitor BYL719 in combination with lapatinib impaired mammary tumor growth and PI3K signaling more potently than BYL719 alone. Lapatinib 69-78 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 13-22 24249715-0 2014 Enhanced PI3K p110alpha signaling confers acquired lapatinib resistance that can be effectively reversed by a p110alpha-selective PI3K inhibitor. Lapatinib 51-60 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 14-23 24249715-0 2014 Enhanced PI3K p110alpha signaling confers acquired lapatinib resistance that can be effectively reversed by a p110alpha-selective PI3K inhibitor. Lapatinib 51-60 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 110-119 24249715-3 2014 Genomic and proteomic analyses revealed that lapatinib-resistant breast cancer cells gained additional phosphoinositide 3-kinase (PI3K) activation through activating mutation in PI3K p110alpha and/or increasing protein expression of existing mutant p110alpha. Lapatinib 45-54 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 183-192 24249715-3 2014 Genomic and proteomic analyses revealed that lapatinib-resistant breast cancer cells gained additional phosphoinositide 3-kinase (PI3K) activation through activating mutation in PI3K p110alpha and/or increasing protein expression of existing mutant p110alpha. Lapatinib 45-54 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 249-258 24249715-4 2014 p110alpha protein upregulation in lapatinib-resistant cells occurred through gene amplification or posttranscriptional upregulation. Lapatinib 34-43 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 0-9 24249715-5 2014 Knockdown of p110alpha, but not p110beta, the other PI3K catalytic subunit present in epithelial cells, inhibited proliferation of lapatinib-resistant cells, especially when combined with lapatinib. Lapatinib 131-140 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 13-22 24249715-5 2014 Knockdown of p110alpha, but not p110beta, the other PI3K catalytic subunit present in epithelial cells, inhibited proliferation of lapatinib-resistant cells, especially when combined with lapatinib. Lapatinib 188-197 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 13-22 24249715-8 2014 These findings indicate that lapatinib resistance can occur through p110alpha protein upregulation-mediated, and/or mutation-induced, PI3K activation. Lapatinib 29-38 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 68-77 21499301-8 2011 Depletion of PIK3CA (a catalytic subunit of PI3K) revealed that survivin expression is regulated by the PI3K pathway in these cells, suggesting that insufficient inhibition of PI3K-survivin signaling is responsible for the limited pro-apoptotic effect of lapatinib in HER2 amplification-positive cells with a PIK3CA mutation. Lapatinib 255-264 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 13-19 21499301-9 2011 Consistent with this notion, depletion of survivin by RNAi or treatment with a PI3K inhibitor markedly increased the level of apoptosis in PIK3CA mutant cells treated with lapatinib. Lapatinib 172-181 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 139-145 21293538-14 2010 PTEN loss and PIK3CA gene mutations are other markers that may predict lapatinib poor response. Lapatinib 71-80 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 14-20 21676217-12 2011 PI3K pathway activation resulting from PTEN loss or PIK3CA mutations may lead to drug resistance to lapatinib and trastuzumab. Lapatinib 100-109 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 52-58 19844234-10 2009 Patients with tumours harbouring an H1047R PIK3CA mutation or low expression of PTEN derived clinical benefit from lapatinib. Lapatinib 115-124 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 43-49 19010894-0 2008 Phosphatidylinositol 3-kinase hyperactivation results in lapatinib resistance that is reversed by the mTOR/phosphatidylinositol 3-kinase inhibitor NVP-BEZ235. Lapatinib 57-66 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 0-29 19010894-0 2008 Phosphatidylinositol 3-kinase hyperactivation results in lapatinib resistance that is reversed by the mTOR/phosphatidylinositol 3-kinase inhibitor NVP-BEZ235. Lapatinib 57-66 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 107-136 19010894-5 2008 In addition, we show that two dominant activating mutations in PIK3CA (E545K and H1047R), which are prevalent in breast cancer, also confer resistance to lapatinib. Lapatinib 154-163 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 63-69 19010894-6 2008 Furthermore, we show that phosphatidylinositol 3-kinase (PI3K)-induced lapatinib resistance can be abrogated through the use of NVP-BEZ235, a dual inhibitor of PI3K/mTOR. Lapatinib 71-80 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 26-55 19010894-7 2008 Our data show that deregulation of the PI3K pathway, either through loss-of-function mutations in PTEN or dominant activating mutations in PIK3CA, leads to lapatinib resistance, which can be effectively reversed by NVP-BEZ235. Lapatinib 156-165 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 139-145 32988919-7 2020 CONCLUSION: Mutations in TP53 and PIK3CA hotspot at exon 9 may be potential negative predictors of ER+HER2+ BC treated with neoadjuvant letrozole and lapatinib, while MLL2 inactivating mutation might confer therapeutic benefit in these patients. Lapatinib 150-159 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 34-40 33005299-8 2020 Finally, a phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha mutation was identified at the time of tumor progression, which may explain the acquired resistance to lapatinib. Lapatinib 185-194 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 11-81 30624609-0 2019 PIK3CA mutations are associated with reduced pathological complete response rates in primary HER2-positive breast cancer: pooled analysis of 967 patients from five prospective trials investigating lapatinib and trastuzumab. Lapatinib 197-206 phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha Homo sapiens 0-6