Gα15 in early onset of pancreatic ductal adenocarcinoma.

Autor: Innamorati G; Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, c/o GB Rossi General Hospital, P.le L.A. Scuro, 37134, Verona, Italy. giulio.innamorati@univr.it., Wilkie TM; Pharmacology Department, UT Southwestern Medical Center, Dallas, TX, USA., Malpeli G; Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, c/o GB Rossi General Hospital, P.le L.A. Scuro, 37134, Verona, Italy., Paiella S; Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, c/o GB Rossi General Hospital, P.le L.A. Scuro, 37134, Verona, Italy., Grasso S; Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, c/o GB Rossi General Hospital, P.le L.A. Scuro, 37134, Verona, Italy., Rusev B; ARC-Net Research Centre, University and Hospital Trust of Verona, Verona, Italy., Leone BE; Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy., Valenti MT; Department of Medicine, University of Verona, Verona, Italy., Carbonare LD; Department of Medicine, University of Verona, Verona, Italy., Cheri S; Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy., Giacomazzi A; Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, c/o GB Rossi General Hospital, P.le L.A. Scuro, 37134, Verona, Italy., Zanotto M; Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, c/o GB Rossi General Hospital, P.le L.A. Scuro, 37134, Verona, Italy., Guardini V; Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, c/o GB Rossi General Hospital, P.le L.A. Scuro, 37134, Verona, Italy., Deiana M; Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy., Zipeto D; Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy., Serena M; Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy., Parenti M; Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy., Guzzi F; Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy., Lawlor RT; ARC-Net Research Centre, University and Hospital Trust of Verona, Verona, Italy., Malerba G; Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy., Mori A; Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy., Malleo G; Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, c/o GB Rossi General Hospital, P.le L.A. Scuro, 37134, Verona, Italy., Giacomello L; Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, c/o GB Rossi General Hospital, P.le L.A. Scuro, 37134, Verona, Italy., Salvia R; Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, c/o GB Rossi General Hospital, P.le L.A. Scuro, 37134, Verona, Italy., Bassi C; Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, c/o GB Rossi General Hospital, P.le L.A. Scuro, 37134, Verona, Italy.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2021 Jul 21; Vol. 11 (1), pp. 14922. Date of Electronic Publication: 2021 Jul 21.
DOI: 10.1038/s41598-021-94150-3
Abstrakt: The GNA15 gene is ectopically expressed in human pancreatic ductal adenocarcinoma cancer cells. The encoded Gα15 protein can promiscuously redirect GPCR signaling toward pathways with oncogenic potential. We sought to describe the distribution of GNA15 in adenocarcinoma from human pancreatic specimens and to analyze the mechanism driving abnormal expression and the consequences on signaling and clinical follow-up. We detected GNA15 expression in pre-neoplastic pancreatic lesions and throughout progression. The analysis of biological data sets, primary and xenografted human tumor samples, and clinical follow-up shows that elevated expression is associated with poor prognosis for GNA15, but not any other GNA gene. Demethylation of the 5' GNA15 promoter region was associated with ectopic expression of Gα15 in pancreatic neoplastic cells, but not in adjacent dysplastic or non-transformed tissue. Down-modulation of Gα15 by shRNA or CRISPR/Cas9 affected oncogenic signaling, and reduced adenocarcimoma cell motility and invasiveness. We conclude that de novo expression of wild-type GNA15 characterizes transformed pancreatic cells. The methylation pattern of GNA15 changes in preneoplastic lesions coincident with the release a transcriptional blockade that allows ectopic expression to persist throughout PDAC progression. Elevated GNA15 mRNA correlates with poor prognosis. In addition, ectopic Gα15 signaling provides an unprecedented mechanism in the early steps of pancreas carcinogenesis distinct from classical G protein oncogenic mutations described previously in GNAS and GNAQ/GNA11.
(© 2021. The Author(s).)
Databáze: MEDLINE
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