Uncovering Novel Cancer Predisposing Genes in Childhood Cancers

Researchers have identified a new source of cancer predisposing signals that could account for the missing heritability in childhood cancers. By interrogating genes involved in DNA damage repair, the study found enrichment of germline TP53 variants in childhood cancer cases, suggesting a novel cancer predisposing gene. The findings provide insights into tumor biology and create opportunities for therapeutic intervention, surveillance, and prevention.

Key Takeaways:

• The study examined germline data from 5,993 childhood cancer cases and 14,477 adult non-cancer controls for damaging variants among 189 DNA damage repair genes.
• Pan-cancer analyses revealed enrichment of germline TP53 variants, with a false discovery rate (FDR) of 0.0066 and 0.0064 using logistic and firth regression models, respectively.
• Cancer-specific analyses demonstrated significant associations for TP53 in adrenocortical carcinoma, with a frequency of 37% (FDRlogistic < 0.0001).
• The study suggests that TP53 is a novel cancer predisposing gene that could account for the missing heritability in childhood cancers.
• Funding for the study was provided by the American Lebanese Syrian Associated Charities, US National Institutes of Health, German Cancer Research Center, and German Cancer Consortium.
• The study highlights the power of unbiased genomic investigations to uncover novel cancer predisposing genes.

Statistics:

• The study examined data from 5,993 childhood cancer cases and 14,477 adult non-cancer controls.
• The analysis focused on 189 DNA damage repair genes, with a threshold for damaging variants set at an allele frequency of 0.7.
• The enrichment of germline TP53 variants was determined using logistic and firth regression models, with FDR values of 0.0066 and 0.0064, respectively.

Sources:

• medrxiv.org content/10.1101/2025.05.12.25325832v1