Immunization With Mycobacterium Vaccae Attenuates Age-Associated Transcriptional Remodeling And Microglial Reactivity In The Rat Hippocampus
As we age, our brains can experience increased inflammation, a process often linked to changes in specialized immune cells within the brain known as microglia. These microglia, which normally help maintain brain health, can become overactive or “primed” with age, contributing to a state of chronic inflammation.
Recent research has explored whether exposure to certain environmental microbes, like the soil bacterium Mycobacterium vaccae, could offer a protective effect. This particular bacterium is known for its ability to help regulate the immune system, promoting a more balanced and less inflammatory response.
A study investigated whether introducing M. vaccae could counteract the age-related changes observed in these brain immune cells. The findings revealed that immunization with M. vaccae significantly reduced indicators of microglial activation and inflammation in key brain regions of aged rats, specifically the hippocampus and amygdala. The hippocampus is a brain area vital for learning and memory, making these results particularly important for understanding how to maintain cognitive health as we get older.
This suggests that interactions with our microbial environment might play a crucial role in modulating age-associated neuroinflammation, potentially offering new avenues for strategies to support brain health in later life.
Source: link to paper