Screening and molecular mechanism research on bile microRNAs associated with chemotherapy efficacy in perihilar cholangiocarcinoma

Shijie Fu; Haizhen Du; Yuyang Dai; Kanglian Zheng; Guang Cao; Liang Xu; Yujie Zhong; Chuanxin Niu; Yan Kong; Xiaodong Wang

doi:10.1016/j.isci.2024.111437

Screening and molecular mechanism research on bile microRNAs associated with chemotherapy efficacy in perihilar cholangiocarcinoma

iScience. 2024 Dec 4;27(12):111437. doi: 10.1016/j.isci.2024.111437. eCollection 2024 Dec 20.

Authors

Affiliations

¹ Department of Interventional Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100000, China.
² Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Renal Cancer and Melanoma, Peking University Cancer Hospital and Institute, Beijing 100142, China.
³ Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Interventional Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China.

Abstract

The efficacy of hepatic arterial infusion chemotherapy (HAIC) with oxaliplatin (OXA) and 5-fluorouracil (5-Fu) for treating advanced perihilar cholangiocarcinoma (pCCA) has been demonstrated, yet the survival benefits of HAIC for pCCA patients vary. Here, we aimed to screen out HAIC resistance-related bile microRNAs (miRNAs) and explore the functions of specific bile miRNAs in pCCA based on high-throughput sequencing. Levels of bile miR-532-3p, miR-1250-5p, and miR-4772-5p were related to the survival of advanced pCCA patients after HAIC. However, only overexpression of miR-532-3p promoted OXA/5-Fu resistance, and downregulation of its expression improved sensitivity to OXA/5-Fu. Mechanistic investigations revealed secreted protein acidic and rich in cysteine (SPARC) as the direct target of miR-532-3p. Our study reveals that bile miR-532-3p, miR-1250-5p, and miR-4772-5p may serve as survival biomarkers in advanced pCCA patients after HAIC and that bile miR-532-3p promotes resistance to HAIC with OXA and 5-Fu via negatively regulating SPARC expression.

Keywords: Cancer; Cell biology; Molecular biology.