Exome sequencing identifies PD-L2 as a potential predisposition gene for lymphoma

Area of Science:

• Genetics
• Oncology
• Immunology

Background:

• Investigated germline predisposition in familial early-onset lymphomas using whole-exome sequencing.
• Identified a novel variant (c.817-1G>T) in the programmed cell death 1 ligand 2 (PD-L2) gene within a family affected by lymphomas and other cancers.

Discussion:

• The PD-L2 variant is located at a splice acceptor site and within a potential enhancer region for JAK2 and PD-L1.
• The variant correlated with increased gene expression of PD-L2, PD-L1, and JAK2, and an abnormal PD-L2 transcript was detected.

Key Insights:

• The c.817-1G>T variant in PD-L2 is proposed as the genetic cause for familial lymphomas.
• Elevated expression of PD-L2, PD-L1, and JAK2 may result from the identified variant's effects on splicing and enhancer activity.

Outlook:

• Identifying PD-L2 as a germline predisposition gene offers new insights into lymphoma's genetic etiology.
• This discovery could guide personalized immunotherapy strategies for lymphoma patients based on PD-L2's role in tumor immunity.