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2015 ; 10
(9
): 1319-1327
Nephropedia Template TP
gab.com Text
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English Wikipedia
Safety and Efficacy of Buparlisib (BKM120) in Patients with PI3K
Pathway-Activated Non-Small Cell Lung Cancer: Results from the Phase II BASALT-1
Study
#MMPMID26098748
Vansteenkiste JF
; Canon JL
; De Braud F
; Grossi F
; De Pas T
; Gray JE
; Su WC
; Felip E
; Yoshioka H
; Gridelli C
; Dy GK
; Thongprasert S
; Reck M
; Aimone P
; Vidam GA
; Roussou P
; Wang YA
; Di Tomaso E
; Soria JC
J Thorac Oncol
2015[Sep]; 10
(9
): 1319-1327
PMID26098748
show ga
INTRODUCTION: The phosphatidylinositol 3-kinase (PI3K) pathway promotes tumor
growth and treatment resistance in non-small cell lung cancer (NSCLC). The aim of
the open-label, two-stage, Phase II study BASALT-1 (NCT01820325) was to
investigate the pan-PI3K inhibitor buparlisib (BKM120) in patients with PI3K
pathway-activated, relapsed NSCLC. METHODS: After prescreening for PI3K pathway
activation, patients with PI3K pathway-activated, metastatic, squamous or
nonsquamous NSCLC, who had relapsed after prior systemic antineoplastic therapy,
were enrolled. In Stage 1, patients received single-agent buparlisib
(100?mg/day). A futility analysis was performed independently in each histology
group, based on the 12-week progression-free survival rate for the first 30
patients treated in each group being less than 50%. Exploratory biomarker
analyses were performed in archival tissue samples and circulating tumor DNA
(ctDNA). RESULTS: Of 1242 prescreened patients, 13.5% exhibited PI3K pathway
activation. As of June 5, 2014, 63 patients (30 squamous and 33 nonsquamous) were
treated in Stage 1. The 12-week progression-free survival rates were 23.3% (95%
confidence interval: 9.9-42.3) and 20.0% (95% confidence interval: 7.7-38.6) in
the squamous and nonsquamous groups, respectively. Stage 2 was therefore not
initiated in either group. PI3K pathway mutations in ctDNA were more concordant
with metastatic tissue than with primary biopsies. CONCLUSIONS: Despite
preselecting patients for targeted treatment, BASALT-1 did not meet its primary
objective during Stage 1. PI3K pathway activation can be detected using ctDNA,
but may not be the main oncogenic driver in NSCLC. Combinations of PI3K
inhibitors with other agents may demonstrate greater efficacy than monotherapy.
|Aged
[MESH]
|Aminopyridines/administration & dosage/pharmacology/*therapeutic use
[MESH]