Study demonstrates Resveratrol's ability to mitigate Alzheimer's Disease (AD) symptoms by inhibiting proinflammatory responses and promoting antioxidant enzyme expression in microglial cell lines, offering insights into its neuroprotective mechanisms.
Senescent microglia are a distinct microglial phenotype present in aging brain that have been implicated in the progression of aging and age-related neurodegenerative diseases. However, the specific mechanisms that trigger microglial senescence are largely unknown. Quinolinic acid (QA) is a cytotoxic metabolite produced upon abnormal activation of microglia. Brain aging and age-related neurodegenerative diseases have an elevated concentration of QA. In the present study, we investigated whether QA promotes aging and aging-related phenotypes in microglia and C. elegans. Here, we demonstrate for the first time that QA, secreted by abnormal microglial stimulation, induces impaired mitophagy by inhibiting mitolysosome formation and consequently promotes the accumulation of damaged mitochondria due to reduced mitochondrial turnover in microglial cells. Defective mitophagy caused by QA drives microglial senescence and poor healthspan in C. elegans. Moreover, oxidative stress can mediate QA-i
Researchers at the Del Monte Institute for Neuroscience at the University of Rochester find that microglia-;the brain's immune cells-;can trigger cognitive deficits after radiation exposure and may be a key target for preventing these symptoms.