<i>Lactobacillaceae</i> ve Parkinson hastalığı: Belirgin bir paradoks.

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Parkinson's disease (PD) is a neurodegenerative disorder predominantly known for its motor symptoms such as bradykinesia, rigidity and tremor, but the disorder is also increasingly recognized for its association with impaired gastrointestinal function. The composition of the gut microbiome is known to be different in PD compared with healthy individuals. One of the bacterial families with increased abundance in people with PD is Lactobacillaceae. Interestingly, opposite effects have been ascribed to Lactobacillaceae in PD. A number of studies have linked Lactobacillaceae spp. in the gut to worse motor function, and to premature degradation of levodopa. However, other studies have linked administration of Lactobacillaceae-containing probiotics to improved motor function and reduced gastrointestinal problems. In this narrative review, we investigate this apparent paradox. The key to its understanding appears to lie in the specific species of Lactobacillaceae. The species L. plantarum in particular seemed to show a correlation with improved motor symptoms, as well as a reduction in intestinal inflammation, whereas L. brevis, L. curvatus and L. fermentum have properties that might be detrimental to people with PD.

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