
Common gut bacteria blocks effects of Parkinson's drugs, study says
Jan. 18 (UPI) -- A common gut bacteria can block a common Parkinson's disease medicine from working on patients with the disease, a new study says. Gut bacteria metabolizes levodopa, a common Parkinson's medication, into dopamine, a neurotransmitter in the brain. Since dopamine can't pass through the blood-brain barrier, it saps the levodopa of its effectiveness, according to a study published Friday in the journal Nature Communications. "It is well established that gut bacteria can affect the brain," Sahar El Aidy, an assistant professor in microbiology at University of Groningen and study lead investigator, said in a news release. "There is a continuous chemical dialogue between gut bacteria and the brain, the so-called gut-brain axis." The less effect a normal dosage of levodopa has on...