Study Uncovers Six Novel Genes Associated with Cancer Risk

A collaborative study led by Icelandic researchers has identified six new genes associated with cancer risk, potentially paving the way for improved cancer detection and treatment strategies. The research, published in Nature Genetics, analyzed genetic data from over 860,000 individuals of European descent, including 130,991 cancer patients.

The study's gene-based burden association analysis across 22 cancer types revealed four genes linked to increased cancer risk: BIK for prostate cancer, ATG12 for colorectal cancer, TG for thyroid cancer, and CMTR2 for both lung cancer and cutaneous melanoma. These rare genetic variants were found to significantly increase cancer risk, with relative increases ranging from 90% to 295%.

In a novel finding, the researchers also identified two genes associated with decreased cancer risk. Loss of function variants in AURKB were found to provide protection against various cancer types, while similar variants in PPP1R15A were linked to a 53% lower risk of breast cancer. This discovery suggests that PPP1R15A inhibition could potentially be explored as a therapeutic approach for breast cancer.

The importance of such genetic discoveries is underscored by previous findings, such as the BRCA1 and BRCA2 genes, which have led to improved early cancer detection and targeted therapies. These advancements have contributed to reducing cancer burden and improving prognosis for mutation carriers.

While the study provides valuable insights into cancer predisposition mechanisms, the researchers caution that the study design does not allow for accurate assessment of absolute lifetime cancer risk. Nevertheless, these findings open new avenues for understanding cancer biology and may lead to enhanced screening protocols and treatment strategies in the future.