A protein linked to ALS and dementia, TDP43, plays a crucial role in regulating DNA mismatch repair, a process vital for maintaining genetic information and cellular health. This discovery, published in Nucleic Acids Research, could significantly impact our understanding of cancer and neurodegeneration. The study reveals that TDP43 regulates genes responsible for fixing DNA mistakes. When this protein is absent or overproduced, these repair genes become hyperactive, leading to neuronal damage and genome instability, potentially triggering cancer. The research team also uncovered a connection between TDP43 and cancer. Analysis of extensive cancer datasets showed that elevated levels of TDP43 correlate with increased mutation rates, placing it at the intersection of neurodegeneration and cancer, two of the most pressing health concerns of our time. This finding opens up new avenues for treatment, as reducing overactive DNA repair in lab models partially reversed damage caused by TDP43 issues. Controlling DNA mismatch repair may offer a therapeutic strategy, according to the lead investigator, Muralidhar L. Hegde, Ph.D. The study's collaborators included researchers from Houston Methodist, MD Anderson Cancer Center, the University of Massachusetts, UT Southwestern Medical Center, and Binghamton University, with support from the National Institutes of Health and various foundations.
