New Research Reveals Gut Bacteria May Trigger Parkinson’s Disease Onset
**NEW YORK —** A groundbreaking study published Tuesday in the journal *Cell Reports Medicine* has established a direct causal link between specific gut bacteria and the onset of Parkinson’s disease, challenging long-held beliefs about the disorder’s origins.
**What:** Scientists at the University of Helsinki identified that a strain of bacteria, *Desulfovibrio*, commonly found in the human gut, produces a protein that triggers the clumping of alpha-synuclein in the brain, the hallmark of Parkinson’s disease. This is the first study to demonstrate that the bacteria are a likely root cause, rather than a consequence, of the neurological condition.
**Who:** The international research team, led by Dr. Aino Lindqvist, analyzed fecal samples from patients with Parkinson’s disease and healthy control subjects. They then transferred the bacteria into laboratory worms and mice.
**When:** The findings were released on Tuesday, February 6, 2024, following a decade-long investigation.
**Where:** The research was conducted at the University of Helsinki in Finland, with collaborative data analysis from institutions in California, United States, and the United Kingdom.
**Why:** The study aims to explain why some individuals develop Parkinson’s disease, which affects movement and cognition, while others with genetic predispositions do not. Researchers theorize that exposure to environmental factors, such as specific gut bacteria, acts as the missing trigger for the disease’s pathology.
**How:** The team isolated *Desulfovibrio* bacteria from patients and transferred them into animal models. Results showed that the bacterial presence caused a 200% increase in alpha-synuclein aggregation, leading to motor symptoms consistent with paralysis. The team confirmed that removing the bacteria from the models reversed the protein clumping.
**Implications:** Experts say this discovery opens the door for a simple probiotic treatment to eliminate the harmful bacteria from the gut, potentially preventing or halting