Alterations of the gut microbiota with antibiotics protects dopamine neuron loss and improve motor deficits in a pharmacological rodent model of Parkinson's disease
| Autor: | Jose A. Pino, Julia Buddendorff, Gonzalo E. Torres, Macarena Vergara, Ronald J. Mandel, Habibeh Khoshbouei, Dimitri N. Koutzoumis |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Male
0301 basic medicine Parkinson's disease Natamycin Substantia nigra Striatum Motor Activity Gut flora Rats Sprague-Dawley 03 medical and health sciences Bacitracin 0302 clinical medicine Neurochemical Parkinsonian Disorders Developmental Neuroscience Vancomycin Dopamine medicine Animals biology business.industry Dopaminergic Neurons Neurotoxicity Neomycin medicine.disease biology.organism_classification Anti-Bacterial Agents Gastrointestinal Microbiome Rats 030104 developmental biology medicine.anatomical_structure Neurology Nerve Degeneration Neuron business Neuroscience 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | Experimental Neurology. 325:113159 |
| ISSN: | 0014-4886 |
| DOI: | 10.1016/j.expneurol.2019.113159 |
| Popis: | Parkinson's disease (PD) is a debilitating condition resulting in motor and non-motor symptoms affecting approximately 10 million people worldwide. Currently, there are no pharmacological treatments that can cure the condition or effectively halt its progression. The focus of PD research has been primarily on the neurobiological basis and consequences of dopamine (DA) neuron degeneration given that the loss of DA neurons projecting from the substantia nigra to the dorsal striatum results in the development of cardinal PD motor symptoms. Alternatively, gastrointestinal dysfunction is well recognized in PD patients, and often occurs prior to the development of motor symptoms. The gut microbiota, which contains thousands of bacterial species, play important roles in intestinal barrier integrity and function, metabolism, immunity and brain function. Pre-clinical and clinical studies suggest an important link between alterations in the composition of the gut microbiota and psychiatric and neurological conditions, including PD. Several reports have documented gut dysbiosis and alterations in the composition of the gut microbiota in PD patients. Therefore, the goal of this study was to explore the contribution of the gut microbiota to the behavioral and neurochemical alterations in a rodent toxin model of DA depletion that reproduces the motor symptoms associated with PD. We observed that chronic treatment of adult rats with non-absorbable antibiotics ameliorates the neurotoxicity of 6-hydroxydopamine (6-OHDA) in a unilateral lesion model. Specifically, immunohistochemistry against the dopaminergic neuron marker tyrosine hydroxylase (TH) showed an attenuation of the degree of 6-OHDA-induced dopaminergic neuron loss in antibiotic treated animals compared to control animals. In addition, we observed a reduction in the expression of pro-inflammatory markers in the striatum of antibiotic-treated animals. The degree of motor dysfunction after 6-OHDA was also attenuated in antibiotic-treated animals as measured by paw-rearing measurements in the cylinder test, forepaw stepping test, and ipsilateral rotations observed in the amphetamine-induced rotation test. These results implicate the gut microbiota as a potential contributor to pathology in the development of PD. Further studies are necessary to understand the specific mechanisms involved in transducing alterations in the gut microbiota to changes in dopaminergic neuron loss and motor dysfunction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect