Current insight into the regulation of PD-L1 in cancer.

"Declarations Ethics approval and consent to participateNot applicable. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This work was supported in part by the National Natural Science Foundation of China (No. 81770158, 82070152), the Pearl River S&T Nova Program of Guangzhou, China (No. 201906010002), Guangdong Province Science and Technology Project (No. 2020A0505100042) (No. 2020A1515110310), Guangdong Basic and Applied Basic Research Foundation (No. 2021A1515110140), Special Funds for the Cultivation of Guangdong College Students’ Scientific and Technological Innovation (“Climbing Program” Special Funds.) (No. pdjh2022a0055), and National Innovation and Entrepreneurship Training Program for Undergraduate (No. 202110559101) (No. 202210559061)."