A link between the brain and the gut
In recent years, research on Parkinson’s disease have shown an increasing interest in involving theintestine and of the intestinal microbiota. A very recent study highlights how alterations in the composition of the microbiota can contribute to inflammation and neuronal damage, through thegut–brain axis. In particular, changes in gut bacteria influence the production of metabolites, which can cross the intestinal barrier and reach the brain, triggering an immune response.
Inflammation and neurodegeneration
One of the central aspects of Parkinson’s disease is the neuroinflammation, that is, a chronic immune response in the brain. The study shows that some microbial metabolites, such as short-chain fatty acids (SCFAs), can have both protective and harmful effects. If produced in an altered way, they can activate immune cells such as microglia, contributing to the death of dopaminergic neurons in the black substance, one of the areas most affected by the disease. This persistent inflammation is a key factor in the worsening of motor and cognitive symptoms.
New therapeutic perspectives
The results suggest that intervening on the intestinal microbiota could open new avenues for the prevention or treatment of Parkinson’s disease. Strategies such as the use of probiotics, prebiotics or a personalized diet could help restore a favorable microbial balance, thus reducing inflammation and disease progression. Understanding the interaction between the gut and the brain therefore offers an innovative approach, complementary to traditional therapies, and highlights the importance of intestinal health in neurological well-being.
For further information: Gao A, Lv J, Su Y. The Inflammatory Mechanism of Parkinsons Disease: Gut Microbiota Metabolites Affect the Development of the Disease Through the Gut-Brain Axis. Brain Sci. 2025 Feb 6;15(2):159. doi: 10.3390/brainsci15020159.