Circulating biomarkers during treatment in patients with advanced biliary tract cancer receiving cediranib in the UK ABC-03 trial

Abstract

BACKGROUND: Advanced biliary tract cancer (ABC) has a poor prognosis. Cediranib, in addition to cisplatin/gemcitabine [CisGem], improved the response rate, but did not improve the progression-free survival (PFS) in the ABC-03 study. Minimally invasive biomarkers predictive of cediranib benefit may improve patient outcomes.
METHODS: Changes in 15 circulating plasma angiogenesis or inflammatory-related proteins and cytokeratin-18 (CK18), measured at baseline and during therapy until disease progression, were correlated with overall survival (OS) using time-varying covariate Cox models (TVC).
RESULTS: Samples were available from n=117/124 (94%) patients. Circulating Ang1&2, FGFb, PDGFbb, VEGFC, VEGFR1 and CK18 decreased as a result of the therapy, independent of treatment with cediranib. Circulating VEGFR2 and Tie2 were preferentially reduced by cediranib. Patients with increasing levels of VEGFA at any time had a worse PFS and OS; this detrimental effect was attenuated in patients receiving cediranib. TVC analysis revealed CK18 and VEGFR2 increases correlated with poorer OS in all patients (P< 0.001 and P=0.02, respectively).
CONCLUSIONS: Rising circulating VEGFA levels in patients with ABC, treated with CisGem, are associated with worse PFS and OS, not seen in patients receiving cediranib. Rising levels of markers of tumour burden (CK18) and potential resistance (VEGFR2) are associated with worse outcomes and warrant validation.

Citation

Backen, A. C., Lopes, A., Wasan, H., Palmer, D. H., Duggan, M., Cunningham, D., …Valle, J. W. (in press). Circulating biomarkers during treatment in patients with advanced biliary tract cancer receiving cediranib in the UK ABC-03 trial. British Journal of Cancer, https://doi.org/10.1038/s41416-018-0132-8

• Journal Article Type: Article
• Acceptance Date: May 3, 2018
• Online Publication Date: Jun 21, 2018
• Deposit Date: Jun 21, 2018
• Publicly Available Date: Jun 21, 2018
• Journal: British Journal of Cancer
• Print ISSN: 0007-0920
• Electronic ISSN: 0007-0920
• Publisher: Cancer Research UK
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1038/s41416-018-0132-8
• Public URL: https://nottingham-repository.worktribe.com/output/939694
• Publisher URL: https://www.nature.com/articles/s41416-018-0132-8