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2016 ; 99
(ä): 23-30
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gab.com Text
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English Wikipedia
A phase I trial of the Hedgehog inhibitor, sonidegib (LDE225), in combination
with etoposide and cisplatin for the initial treatment of extensive stage small
cell lung cancer
#MMPMID27565909
Pietanza MC
; Litvak AM
; Varghese AM
; Krug LM
; Fleisher M
; Teitcher JB
; Holodny AI
; Sima CS
; Woo KM
; Ng KK
; Won HH
; Berger MF
; Kris MG
; Rudin CM
Lung Cancer
2016[Sep]; 99
(ä): 23-30
PMID27565909
show ga
OBJECTIVES: The Hedgehog pathway has been implicated in small cell lung cancer
(SCLC) tumor initiation and progression. Pharmacologic blockade of the key
Hedgehog regulator, Smoothened, may inhibit these processes. We performed a phase
I study to determine the maximum tolerated dose (MTD) of sonidegib (LDE225), a
selective, oral Smoothened antagonist, in combination with etoposide/cisplatin in
newly diagnosed patients with extensive stage SCLC. MATERIALS AND METHODS:
Patients received 4-6 21-day cycles of etoposide/cisplatin with daily sonidegib.
Patients with response or stable disease were continued on sonidegib until
disease progression or unacceptable toxicity. Two dose levels of sonidegib were
planned: 400mg and 800mg daily, with 200mg daily de-escalation if necessary. Next
generation sequencing was performed on available specimens. Circulating tumor
cells (CTCs) were quantified at baseline and with disease evaluation. RESULTS:
Fifteen patients were enrolled. 800mg was established as the recommended phase II
dose of sonidegib in combination with etoposide/cisplatin. Grade 3 or greater
toxicities included: anemia (n=5), neutropenia (n=8), CPK elevation (n=2),
fatigue (n=2), and nausea (n=2). Toxicity led to removal of one patient from
study. Partial responses were confirmed in 79% (11/14; 95% CI: 49-95%). One
patient with SOX2 amplification remains progression-free on maintenance sonidegib
after 27 months. CTC count, at baseline, was associated with the presence of
liver metastases and after 1 cycle of therapy, with overall survival.
CONCLUSIONS: Sonidegib 800mg daily was the MTD when administered with EP. Further
genomic characterization of exceptional responders may reveal clinically relevant
predictive biomarkers that could tailor use in patients most likely to benefit.
|Antineoplastic Combined Chemotherapy Protocols/adverse effects/*therapeutic use
[MESH]