Fecal Microbiota Transplantation in Parkinson’s Disease: A Study in Mice

Parkinson’s disease (PD) is a debilitating neurodegenerative disorder with no known cure. Research suggests a potential link between gut microbiota imbalances (“dysbiosis”) and the development of PD. This study investigated the impact of fecal microbiota transplantation (FMT) from PD patients on the progression of PD-like pathology in mice.

Human Donors and Mice Model

Fecal material was collected from patients diagnosed with idiopathic PD and healthy individuals at the Movement Disorders Unit of the Centro Hospitalar e Universitário de Coimbra. These samples were then transplanted into C57BL/6 male mice to establish a PD mouse model. A total of 115 mice were divided into multiple cohorts, receiving fecal transplants from either PD patients or healthy donors.

Research Design and Parameters

Researchers monitored various parameters including body weight, blood glucose levels, and motor function in the mice. At the end of the study, tissues were collected for analysis of the gut microbiome, inflammation markers, protein expression, and dopamine levels.

The study utilized a combination of behavioral tests, histology, and molecular biology techniques to assess the effects of FMT on PD-like pathology. Behavior tests included the beam walking, inverted grid, and hindlimb clasping tests to measure motor coordination, balance, and limb strength.

Microbiome Profiling and Disease Analysis

The microbiome composition of the fecal samples was analyzed to identify any significant differences between the PD and control groups. The presence of specific bacteria associated with PD was investigated, along with an analysis of the overall gut microbial diversity.