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. 2024 Jul 1;155(1):93-103.
doi: 10.1002/ijc.34892. Epub 2024 Mar 6.

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

Xiaogan Wang  1 , Lijuan Deng  1 , Lingyan Ping  1 , Yunfei Shi  2 , Haojie Wang  3 , Feier Feng  1 , Xin Leng  1 , Yahan Tang  1 , Yan Xie  1 , Zhitao Ying  1 , Weiping Liu  1 , Jun Zhu  1 , Yuqin Song  1
Affiliations

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

Xiaogan Wang et al. Int J Cancer. .

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.

Keywords: germline variant; lymphoma; lymphoma‐cancer family.

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