PHY34 inhibits autophagy through V-ATPase V0A2 subunit inhibition and CAS/CSE1L nuclear cargo trafficking in high grade serous ovarian cancer.

Autor: Salvi A; Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, 60607, USA., Young AN; Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, 60607, USA., Huntsman AC; Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH, 43210, USA., Pergande MR; Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 60607, USA., Korkmaz MA; Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 60607, USA., Rathnayake RA; Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 60607, USA., Mize BK; Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH, 43210, USA., Kinghorn AD; Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH, 43210, USA., Zhang X; Department of Biomedical Informatics, The Ohio State University, Columbus, OH, 43210, USA., Ratia K; Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, 60607, USA., Schirle M; Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA, 02139, USA., Thomas JR; Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA, 02139, USA., Brittain SM; Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA, 02139, USA., Shelton C; Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA, 02139, USA., Aldrich LN; Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 60607, USA., Cologna SM; Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 60607, USA., Fuchs JR; Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH, 43210, USA., Burdette JE; Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, 60607, USA. joannab@uic.edu.
Jazyk: angličtina
Zdroj: Cell death & disease [Cell Death Dis] 2022 Jan 10; Vol. 13 (1), pp. 45. Date of Electronic Publication: 2022 Jan 10.
DOI: 10.1038/s41419-021-04495-w
Abstrakt: PHY34 is a synthetic small molecule, inspired by a compound naturally occurring in tropical plants of the Phyllanthus genus. PHY34 was developed to have potent in vitro and in vivo anticancer activity against high grade serous ovarian cancer (HGSOC) cells. Mechanistically, PHY34 induced apoptosis in ovarian cancer cells by late-stage autophagy inhibition. Furthermore, PHY34 significantly reduced tumor burden in a xenograft model of ovarian cancer. In order to identify its molecular target/s, we undertook an unbiased approach utilizing mass spectrometry-based chemoproteomics. Protein targets from the nucleocytoplasmic transport pathway were identified from the pulldown assay with the cellular apoptosis susceptibility (CAS) protein, also known as CSE1L, representing a likely candidate protein. A tumor microarray confirmed data from mRNA expression data in public databases that CAS expression was elevated in HGSOC and correlated with worse clinical outcomes. Overexpression of CAS reduced PHY34 induced apoptosis in ovarian cancer cells based on PARP cleavage and Annexin V staining. Compounds with a diphyllin structure similar to PHY34 have been shown to inhibit the ATP6V0A2 subunit of V(vacuolar)-ATPase. Therefore, ATP6V0A2 wild-type and ATP6V0A2 V823 mutant cell lines were tested with PHY34, and it was able to induce cell death in the wild-type at 246 pM while the mutant cells were resistant up to 55.46 nM. Overall, our data demonstrate that PHY34 is a promising small molecule for cancer therapy that targets the ATP6V0A2 subunit to induce autophagy inhibition while interacting with CAS and altering nuclear localization of proteins.
(© 2022. The Author(s).)
Databáze: MEDLINE
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