Volume 155, Issue 1 pp. 93-103
RESEARCH ARTICLE

Germline variants of DNA repair and immune genes in lymphoma from lymphoma-cancer families

Xiaogan Wang

Xiaogan Wang

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China

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Lijuan Deng

Lijuan Deng

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China

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Lingyan Ping

Lingyan Ping

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China

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Yunfei Shi

Yunfei Shi

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Pathology, Peking University Cancer Hospital & Institute, Beijing, China

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Haojie Wang

Haojie Wang

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Central Laboratory, Peking University Cancer Hospital & Institute, Beijing, China

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Feier Feng

Feier Feng

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China

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Xin Leng

Xin Leng

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China

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Yahan Tang

Yahan Tang

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China

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Yan Xie

Yan Xie

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China

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Zhitao Ying

Zhitao Ying

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China

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Weiping Liu

Weiping Liu

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China

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Jun Zhu

Jun Zhu

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China

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Yuqin Song

Corresponding Author

Yuqin Song

Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China

Correspondence

Yuqin Song, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Lymphoma, Peking University Cancer Hospital & Institute, No. 52 Fucheng Road, Haidian District, Beijing 100142, China.

Email: [email protected]

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First published: 06 March 2024

Abstract

The genetic predisposition to lymphoma is not fully understood. We identified 13 lymphoma-cancer families (2011–2021), in which 27 individuals developed lymphomas and 26 individuals had cancers. Notably, male is the predominant gender in lymphoma patients, whereas female is the predominant gender in cancer patients (p = .019; OR = 4.72, 95% CI, 1.30–14.33). We collected samples from 18 lymphoma patients, and detected germline variants through exome sequencing. We found that germline protein truncating variants (PTVs) were enriched in DNA repair and immune genes. Totally, we identified 31 heterozygous germline mutations (including 12 PTVs) of 25 DNA repair genes and 19 heterozygous germline variants (including 7 PTVs) of 14 immune genes. PTVs of ATM and PNKP were found in two families, respectively. We performed whole genome sequencing of diffuse large B cell lymphomas (DLBCLs), translocations at IGH locus and activation of oncogenes (BCL6 and MYC) were verified, and homologous recombination deficiency was detected. In DLBCLs with germline PTVs of ATM, deletion and insertion in CD58 were further revealed. Thus, in lymphoma-cancer families, we identified germline defects of both DNA repair and immune genes in lymphoma patients.

Graphical Abstract

What's new?

The genetic predisposition to lymphoma has yet to be fully understood. Here, the authors performed sequencing analyses in 13 lymphoma-cancer families, in which males tended to develop lymphomas and females to develop cancers. They identified germline variants for 25 DNA repair genes and 14 immune genes in 18 lymphoma patients, with more than one third of these mutations being protein truncating. Genome instability and oncogene activation were verified in lymphoma samples, and somatic mutations mediating immune evasion were also found. These germline defects of DNA repair and immune genes suggest germline double hits in lymphomagenesis.

CONFLICT OF INTEREST STATEMENT

The authors declare no conflicts of interest.

DATA AVAILABILITY STATEMENT

The WES, WGS, and RNAseq data generated in this study are available in the National Genomics Data Center (https://ngdc.cncb.ac.cn/omix) under accession numbers OMIX005168 and OMIX005149.41 Other information that supports the findings of this study is available from the corresponding author upon request.

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