QQ群资料汇总:
Phase I, dose-escalation study of BKM120, an oral pan-Class I PI3K inhibitor, in patients with advanced solid tumors.
Bendell JC, Rodon J, Burris HA, de Jonge M, Verweij J, Birle D, Demanse D, De Buck SS, Ru QC, Peters M, Goldbrunner M, Baselga J.
Source
Sarah Cannon Research Institute, Nashville, TN, USA.
Abstract
PURPOSE:
This phase I dose-escalation study investigated the maximum-tolerated dose (MTD), safety, preliminary activity, pharmacokinetics (PK), and pharmacodynamics of BKM120, a potent and highly specific oral pan-Class I PI3K inhibitor.
PATIENTS AND METHODS:
Thirty-five patients with advanced solid tumors received daily BKM120 12.5 to 150 mg. Dose escalation was guided by a Bayesian logistic regression model with overdose control. Assessments included archival tumor molecular status, response by Response Evaluation Criteria in Solid Tumors (RECIST), positron emission tomography tracer uptake ([(18)F]fluorodeoxyglucose positron emission tomography [FDG-PET]), fasting plasma C-peptide, and phosphorylated ribosomal protein S6 (pS6) in skin biopsies.
RESULTS:
Overall, treatment was well tolerated. Dose-limiting toxicities were grade 2 mood alteration (80 mg), grade 3 epigastralgia, grade 3 rash, grade 2 and grade 3 mood alteration (100 mg), and two grade 4 hyperglycemia (150 mg). The MTD was 100 mg/d. Frequent treatment-related adverse events included rash, hyperglycemia, diarrhea, anorexia, and mood alteration (37% each); nausea (31%); fatigue (26%); pruritus (23%); and mucositis (23%). BKM120 demonstrated rapid absorption, half-life of ~40 hours, ~three-fold steady-state accumulation, dose-proportional exposure, and moderate interpatient variability. One patient demonstrated a confirmed partial response (triple-negative breast cancer); seven patients (20%) were on study for ≥ 8 months. BKM120 demonstrated dose-dependent pharmacodynamic effects on [(18)F]FDG-PET, fasting C-peptide, fasting blood glucose, and pS6. No significant trends were seen to correlate tumor molecular alterations with clinical activity.
CONCLUSION:
This study demonstrates feasibility and proof-of-concept of class I PI3K inhibition in patients with advanced cancers. BKM120, at the MTD of 100 mg/d, is safe and well tolerated, with a favorable PK profile, clear evidence of target inhibition, and preliminary antitumor activity.
Bkm120:bkm这个药对一部分的790和met有效,能治疗脑转,要联egfr类的药,有相当多的肺癌脑转是PI3K突变
建议用50mg的最低量,换算成盐是55mg每天,上限是80mg每天(吃5天停2天)。
当主药,就是得PI3k或pten突变;19%有效率;
肺腺癌病人中PI3K的突变率是2%,扩增率是6-19%,PTEN突变率是1%,缺失率是77%
(1)鳞癌
(2)kras突变可能有用
(3)HGF过表达导致的EGFR耐药
(4)HER2突变或者扩增的肺癌或者乳腺癌病人,其应用BIBW2992或者PF00299804等Her2 TKI耐药后,可以联合BKM120。
(5)对于T790M或者cMet扩增导致的EGFR耐药病人,PI3K/Akt信号通路上调,EGFR TKI联合BKM120有一定效果。
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