Academic Journal
Could the Urease of the Gut Bacterium Proteus mirabilis Play a Role in the Altered Gut–Brain Talk Associated with Parkinson's Disease?
| Τίτλος: | Could the Urease of the Gut Bacterium Proteus mirabilis Play a Role in the Altered Gut–Brain Talk Associated with Parkinson's Disease? |
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| Συγγραφείς: | Grahl, Matheus V. C., Andrade, Brenda da Silva, Perin, Ana Paula A., Neves, Gilda A., Duarte, Laura de Souza, Uberti, Augusto Frantz, Hohl, Kelvin Siqueira, Follmer, Cristian, Carlini, Celia Regina |
| Πηγή: | Microorganisms; Aug2023, Vol. 11 Issue 8, p2042, 29p |
| Θεματικοί όροι: | Parkinson's disease, Proteus (Bacteria), Alpha-synuclein, Tyrosine hydroxylase, Membrane permeability (Biology), Urease |
| Περίληψη: | Intestinal dysbiosis seems to play a role in neurodegenerative pathologies. Parkinson's disease (PD) patients have an altered gut microbiota. Moreover, mice treated orally with the gut microbe Proteus mirabilis developed Parkinson's-like symptoms. Here, the possible involvement of P. mirabilis urease (PMU) and its B subunit (PmUreβ) in the pathogenesis of PD was assessed. Purified proteins were given to mice intraperitoneally (20 μg/animal/day) for one week. Behavioral tests were conducted, and brain homogenates of the treated animals were subjected to immunoassays. After treatment with PMU, the levels of TNF-α and IL-1β were measured in Caco2 cells and cellular permeability was assayed in Hek 293. The proteins were incubated in vitro with α-synuclein and examined via transmission electron microscopy. Our results showed that PMU treatment induced depressive-like behavior in mice. No motor deficits were observed. The brain homogenates had an increased content of caspase-9, while the levels of α-synuclein and tyrosine hydroxylase decreased. PMU increased the pro-inflammatory cytokines and altered the cellular permeability in cultured cells. The urease, but not the PmUreβ, altered the morphology of α-synuclein aggregates in vitro, forming fragmented aggregates. We concluded that PMU promotes pro-inflammatory effects in cultured cells. In vivo, PMU induces neuroinflammation and a depressive-like phenotype compatible with the first stages of PD development. [ABSTRACT FROM AUTHOR] |
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| Βάση Δεδομένων: | Complementary Index |
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