Polymorphic variants involved in methylation regulation: a strategy to discover risk loci for pancreatic ductal adenocarcinoma

Chiara Corradi, Giulia Lencioni, Manuel Gentiluomo, Alessio Felici, Anna Latiano, Gediminas Kiudelis, Casper H J van Eijck, Katalin Marta, Rita T Lawlor, Francesca Tavano, Ugo Boggi, Frederike Dijk, Giulia Martina Cavestro, Roel C H Vermeulen, Thilo Hackert, Maria Chiara Petrone, Faik Güntac Uzunoğlu, Livia Archibugi, Jakob R Izbicki, Luca MorelliAlessandro Zerbi, Stefano Landi, Hannah Stocker, Renata Talar-Wojnarowska, Gregorio Di Franco, Péter Hegyi, Cosimo Sperti, Silvia Carrara, Gabriele Capurso, Maria Gazouli, Hermann Brenner, Stefania Bunduc, Olivier Busch, Francesco Perri, Martin Oliverius, Péter Jeno Hegyi, Mara Goetz, Pasquale Scognamiglio, Andrea Mambrini, Paolo Giorgio Arcidiacono, Edita Kreivenaite, Juozas Kupcinskas, Tamas Hussein, Stefano Ermini, Anna Caterina Milanetto, Pavel Vodicka, Vytautas Kiudelis, Viktor Hlaváč, Pavel Soucek, George E Theodoropoulos, Daniela Basso, John P Neoptolemos, Mateus Nóbrega Aoki, Raffaele Pezzilli, Claudio Pasquali, Roger Chammas, Sabrina Gloria Giulia Testoni, Beatrice Mohelnikova-Duchonova, Maurizio Lucchesi, Cosmeri Rizzato, Federico Canzian, Daniele Campa

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

INTRODUCTION: Only a small number of risk factors for pancreatic ductal adenocarcinoma (PDAC) has been established. Several studies identified a role of epigenetics and of deregulation of DNA methylation. DNA methylation is variable across a lifetime and in different tissues; nevertheless, its levels can be regulated by genetic variants like methylation quantitative trait loci (mQTLs), which can be used as a surrogate.

MATERIALS AND METHODS: We scanned the whole genome for mQTLs and performed an association study in 14 705 PDAC cases and 246 921 controls. The methylation data were obtained from whole blood and pancreatic cancer tissue through online databases. We used the Pancreatic Cancer Cohort Consortium and the Pancreatic Cancer Case-Control Consortium genome-wide association study (GWAS) data as discovery phase and the Pancreatic Disease Research consortium, the FinnGen project and the Japan Pancreatic Cancer Research consortium GWAS as replication phase.

RESULTS: The C allele of 15q26.1-rs12905855 showed an association with a decreased risk of PDAC (OR=0.90, 95% CI 0.87 to 0.94, p=4.93×10 -8 in the overall meta-analysis), reaching genome-level statistical significance. 15q26.1-rs12905855 decreases the methylation of a 'C-phosphate-G' (CpG) site located in the promoter region of the RCCD1 antisense ( RCCD1-AS1) gene which, when expressed, decreases the expression of the RCC1 domain-containing ( RCCD1) gene (part of a histone demethylase complex). Thus, it is possible that the rs12905855 C-allele has a protective role in PDAC development through an increase of RCCD1 gene expression, made possible by the inactivity of RCCD1-AS1.

CONCLUSION: We identified a novel PDAC risk locus which modulates cancer risk by controlling gene expression through DNA methylation.

Original languageEnglish
Article number108910
Pages (from-to)980-986
Number of pages7
JournalJournal of Medical Genetics
Volume60
Issue number10
Early online date2 May 2023
DOIs
Publication statusPublished - 1 Oct 2023

Bibliographical note

Publisher Copyright:
© 2023 Authors. All rights reserved.

Funding

This work was supported by intramural funding of DKFZ (to FC); Fondazione Tizzi ( www.fondazionetizzi.it ); Fondazione Arpa ( www.fondazionearpa.it , to DC); and Associazione Italiana per la Ricerca sul Cancro (AIRC IG 2021-26201, to GC). This work was supported by Italian Ministry of Health grants (Ricerca Corrente 2022-2024) to Fondazione 'Casa Sollievo della Sofferenza' IRCCS Hospital, San Giovanni Rotondo (FGU), Italy and by the '5x1000' voluntary contribution.

FundersFunder number
Fondazione Tizzi
Deutsches Krebsforschungszentrum
Ministero della Salute2022-2024
Associazione Italiana per la Ricerca sul CancroIG 2021-26201
Fondazione Arpa

    Keywords

    • DNA Methylation
    • Genetic Variation
    • Genetics
    • Germ-Line Mutation
    • Molecular Epidemiology

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