Journal
EXPERT OPINION ON INVESTIGATIONAL DRUGS
Volume 30, Issue 4, Pages 343-350Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/13543784.2021.1897102
Keywords
Biliary tract cancer; cholangiocarcinoma; PD-L1; immunotherapy; immune-checkpoint inhibitors; durvalumab; MEDI4736
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The paper provides an overview of current status of immunotherapies for biliary tract cancer (BTC), discusses the pharmacology, safety and efficacy of anti-PD-L1 inhibitor durvalumab in treating BTC, and considers future research directions for this agent in this context.
Introduction: The prognosis of patients with advanced biliary tract cancer (BTC) remains dismal, with a 5-year overall survival rate of less than 10%. Although immune checkpoint inhibitors (ICIs) have revolutionized the treatment landscape of several hematological and solid tumors, controversial results have been reported in BTC. In this setting, the anti-PD-L1 inhibitor durvalumab is currently under investigation in several clinical trials as monotherapy, or in combination with other pharmacological agents. Areas covered: We offer an overview of immunotherapies for BTC, discuss recently published or presented data on durvalumab pharmacology, safety, and efficacy in the treatment of BTC and consider future research directions for the agent in this setting. Expert opinion: The promising antitumor activity shown by durvalumab in early trials warrants further investigation because it may provide more effective, much needed treatment options. The results of clinical trials of this PD-L1 inhibitor, as a monotherapy or in combination, are eagerly awaited. Future efforts should focus on the identification and development of reliable biomarkers of response to durvalumab in BTC, clarifying the role of PD-L1 expression, microsatellite instability (MSI), mismatch repair (MMR), tumor mutational burden (TMB) and other emerging predictors.
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