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2016 ; 22
(6
): 1325-9
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An Investigator-Initiated Open-Label Trial of Sonidegib in Advanced Basal Cell
Carcinoma Patients Resistant to Vismodegib
#MMPMID26546616
Danial C
; Sarin KY
; Oro AE
; Chang AL
Clin Cancer Res
2016[Mar]; 22
(6
): 1325-9
PMID26546616
show ga
PURPOSE: To assess the tumor response to the smoothened (SMO) inhibitor,
sonidegib (LDE225), in patients with an advanced basal cell carcinoma (BCC)
resistant to treatment with vismodegib (GDC0449). EXPERIMENTAL DESIGN: Nine
patients with an advanced BCC that was previously resistant to treatment with
vismodegib were given sonidegib in this investigational, open-label study. Tumor
response was determined using the response evaluation criteria in solid tumors.
SMO mutations were identified using biopsy samples from the target BCC location.
RESULTS: The median duration of treatment with sonidegib was 6 weeks (range, 3-58
weeks). Five patients experienced progressive disease with sonidegib. Three
patients experienced stable disease and discontinued sonidegib either due to
adverse events (n = 1) or due to election for surgery (n = 2). The response of
one patient was not evaluable. SMO mutations with in vitro data suggesting
resistance to Hh pathway inhibition were identified in 5 patients, and none of
these patients experienced responses while on sonidegib. CONCLUSIONS: Patients
with advanced BCCs that were previously resistant to treatment with vismodegib
similarly demonstrated treatment resistance with sonidegib. Patients who have
developed treatment resistance to an SMO inhibitor may continue to experience
tumor progression in response to other SMO inhibitors.
|*Drug Resistance, Neoplasm
[MESH]
|Adult
[MESH]
|Aged
[MESH]
|Aged, 80 and over
[MESH]
|Anilides/pharmacology/therapeutic use
[MESH]
|Antineoplastic Agents/pharmacology/*therapeutic use
[MESH]
|Biphenyl Compounds/pharmacology/*therapeutic use
[MESH]