Publication — IRIC

PRMT inhibition induces a viral mimicry response in triple-negative breast cancer.

Triple-negative breast cancer (TNBC) is the most aggressive breast cancer subtype with the worst prognosis and few effective therapies. Here we identified MS023, an inhibitor of type I protein arginine methyltransferases (PRMTs), which has antitumor growth activity in TNBC. Pathway analysis of TNBC cell lines indicates that the activation of interferon responses before and after MS023 treatment is a functional biomarker and determinant of response, and these observations extend to a panel of human-derived organoids. Inhibition of type I PRMT triggers an interferon response through the antiviral defense pathway with the induction of double-stranded RNA, which is derived, at least in part, from inverted repeat Alu elements. Together, our results represent a shift in understanding the antitumor mechanism of type I PRMT inhibitors and provide a rationale and biomarker approach for the clinical development of type I PRMT inhibitors.

Publication date
August 1, 2022
Principal Investigators
Wu Q, Nie DY, Ba-Alawi W, Ji Y, Zhang Z, Cruickshank J, Haight J, Ciamponi FE, Chen J, Duan S, Shen Y, Liu J, Marhon SA, Mehdipour P, Szewczyk MM, Dogan-Artun N, Chen W, Zhang LX, Deblois G, Prinos P, Massirer KB, Barsyte-Lovejoy D, Jin J, De Carvalho DD, Haibe-Kains B, Wang X, Cescon DW, Lupien M, Arrowsmith CH
PubMed reference
Nat Chem Biol 2022;18(8):821-830
PubMed ID
35578032
Affiliation
The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, China. wuqin@ibmc.ac.cn.