Topic: Neuroscience, Cancer Research

Researchers at Houston Methodist have made a groundbreaking discovery linking a protein tied to neurodegenerative conditions such as dementia and ALS to the control of DNA mismatch repair. This critical process corrects errors that occur when cells copy genetic material.

Key Finding

The study, published in Nucleic Acids Research, reveals that the protein 'TDP43' regulates genes responsible for fixing DNA errors. When levels of this protein drop too low or rise too high, those repair genes become overly active, potentially harming neurons and destabilizing the genome.

"DNA repair is one of the most fundamental processes in biology," said lead investigator Muralidhar L. Hegde, Ph.D., professor of neurosurgery at the Houston Methodist Research Institute's Center for Neuroregeneration. "What we found is that TDP43 is not just another RNA-binding protein involved in splicing, but a critical regulator of mismatch repair machinery."

Implications

The findings suggest that the protein may influence both brain diseases and cancer. Higher amounts of TDP43 were associated with greater numbers of mutations in tumors analyzed from large cancer databases, pointing to a link between the protein and increased mutation load in cancers. The researchers propose that controlling DNA mismatch repair may offer a therapeutic strategy for treating neurodegenerative conditions and cancer.