Mutational signature dynamics shaping the evolution of oesophageal adenocarcinoma

Author:

Abbas Sujath,Pich Oriol,Devonshire GinnyORCID,Zamani Shahriar A.ORCID,Katz-Summercorn AnnaliseORCID,Killcoyne Sarah,Cheah Calvin,Nutzinger Barbara,Grehan Nicola,Lopez-Bigas NuriaORCID,Edwards Paul A. W.,Fidziukiewicz Elwira,Redmond Aisling M.,Freeman Adam,Smyth Elizabeth C.,O’Donovan Maria,Miremadi Ahmad,Malhotra Shalini,Tripathi Monika,Coles Hannah,Flint Conor,Eldridge Matthew,Jammula Sriganesh,Davies Jim,Crichton Charles,Carroll Nick,Hardwick Richard H.,Safranek Peter,Hindmarsh Andrew,Sujendran Vijayendran,Hayes Stephen J.,Ang Yeng,Sharrocks Andrew,Preston Shaun R.,Bagwan Izhar,Save Vicki,Skipworth Richard J. E.,Hupp Ted R.,O’Neill J. Robert,Tucker Olga,Beggs Andrew,Taniere Philippe,Puig Sonia,Contino Gianmarco,Underwood Timothy J.,Walker Robert C.,Grace Ben L.,Lagergren Jesper,Gossage James,Davies Andrew,Chang Fuju,Mahadeva Ula,Goh Vicky,Ciccarelli Francesca D.,Sanders Grant,Berrisford Richard,Chan David,Cheong Ed,Kumar Bhaskar,Sreedharan L.,Parsons Simon L.,Soomro Irshad,Kaye Philip,Saunders John,Lovat Laurence,Haidry Rehan,Scott Michael,Sothi Sharmila,Lishman Suzy,Hanna George B.,Peters Christopher J.,Moorthy Krishna,Grabowska Anna,Turkington Richard,McManus Damian,Coleman Helen,Petty Russell D.,Bartlett Freddie,Fitzgerald Rebecca C.ORCID,Secrier MariaORCID,

Abstract

AbstractA variety of mutational processes drive cancer development, but their dynamics across the entire disease spectrum from pre-cancerous to advanced neoplasia are poorly understood. We explore the mutagenic processes shaping oesophageal adenocarcinoma tumorigenesis in 997 instances comprising distinct stages of this malignancy, from Barrett Oesophagus to primary tumours and advanced metastatic disease. The mutational landscape is dominated by the C[T > C/G]T substitution enriched signatures SBS17a/b, which are linked withTP53mutations, increased proliferation, genomic instability and disease progression. The APOBEC mutagenesis signature is a weak but persistent signal amplified in primary tumours. We also identify prevalent alterations in DNA damage repair pathways, with homologous recombination, base and nucleotide excision repair and translesion synthesis mutated in up to 50% of the cohort, and surprisingly uncoupled from transcriptional activity. Among these, the presence of base excision repair deficiencies show remarkably poor prognosis in the cohort. In this work, we provide insights on the mutational aetiology and changes enabling the transition from pre-neoplastic to advanced oesophageal adenocarcinoma.

Funder

RCUK | Medical Research Council

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary

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