A bacterium greatest recognized for inflicting tooth decay has been linked to Parkinson’s illness, in what researchers name the primary examine to indicate a direct microbial pathway driving the situation.
The examine, revealed this month in Nature Communicationswas led by researchers in South Korea at POSTECH and Sungkyunkwan College, with collaborators from Seoul Nationwide College. It discovered that Streptococcus mutans — sometimes discovered within the mouth — was current within the intestine microbiome of individuals with Parkinson’s illness and appeared to play a central position.
The group analyzed stool samples from almost 500 sufferers with Parkinson’s and 234 wholesome controls, making a high-resolution profile of the intestine microbiome.
They found that S. mutans produces an enzyme referred to as UrdA, which generates a compound often called imidazole propionate. That metabolite, the authors confirmed, can journey to the mind and injury dopamine-producing neurons — an indicator of Parkinson’s.
When researchers launched S. mutans or the metabolite into mice, the animals developed motor issues and mind adjustments resembling these seen in Parkinson’s illness.
The findings counsel, for the primary time, a direct “intestine–mind” microbial mechanism for the neurodegenerative dysfunction, and lift questions on whether or not oral well being might affect neurological illness danger.
Different latest analysis
Simply months earlier, on June 9, a separate examine led by King’s School London reported that mouth and intestine micro organism had been linked to mind adjustments in Parkinson’s, significantly in relation to cognitive decline. That examine, nonetheless, was observational and centered on associations seen in MRI scans — with out figuring out a selected microbial pathway.
Collectively, the 2 research spotlight a rising recognition of the oral–intestine–mind axis in Parkinson’s illness.
On common, 38 folks in Canada are recognized with parkinsonism daily. The chance of growing parkinsonism usually will increase with age. Virtually eight out of 10 persons are recognized after the age of 65.
