Lipopolysaccharide-based endotoxemia produce toxicity in peripheral organs and microglia migration in a dose-dependent manner in rat substantia nigra
| Autor: | Daniel Rembao Bojórquez, Aurora Sánchez-García, Paola Heman Bozadas, Rasajna Nadella, María Rovirosa Hernández, Daniel Hernandez Baltazar |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Lipopolysaccharides Male medicine.medical_specialty neurons lcsh:Medicine Substantia nigra motor impairment Pathology and Forensic Medicine 03 medical and health sciences 0302 clinical medicine Dopamine Cell Movement Internal medicine medicine Animals Rats Wistar Cell damage Microglia Tyrosine hydroxylase Pars compacta Chemistry Dopaminergic Neurons lcsh:R Dopaminergic medicine.disease Endotoxemia Rats Ventral tegmental area Substantia Nigra 030104 developmental biology medicine.anatomical_structure Endocrinology nervous system inflammation Neurology (clinical) dopamine 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | Folia Neuropathologica, Vol 57, Iss 3, Pp 258-266 (2019) |
| ISSN: | 1509-572X |
| Popis: | The peripheral inflammatory stimulus could induce cell damage in peripheral organs and activate microglial cells in the brain. One such stimulus was given to adult male Wistar rats by injecting different concentrations of lipopolysaccharide (LPS; 50, 300, 500 g/kg and 5 mg/kg i.p.). To verify the systemic effect of the LPS administration, the serum content of C-reactive protein (CRP), the variation of body weight and cellular changes in the spleen, liver and kidney were determined. Motor impairment was evaluated by rotarod and open field tests. Microglia activation and dopaminergic degeneration was confirmed by immunolabelling for CD11b/c (microglia) and tyrosine hydroxylase (TH), respectively. The cell counting was performed in substantia nigra pars compacta (SNpc), microglial activation was explored in SNpc, substantia nigra pars reticulata (SNpr), substantia nigra pars compacta dorsal (SNcd) and the ventral tegmental area (VTA). For the statistical analysis, one-way ANOVA followed by Tukey post hoc test (p ≤ 0.05) was used. On day 7 post intraperitoneal administration of LPS, cellular atrophy was detected in the liver, kidney and spleen at 5 mg/kg, without significant changes in CRP levels. Body weight loss and motor impairment was present only on day 1 post LPS administration. The dosage of 500 g/kg and 5 mg/kg of LPS caused the loss of dopaminergic neurons (40%) in SNpc and microglia migration in a dose-dependent manner in SNcd, SNpc and SNpr. LPS-induced endotoxemia favours damage to the peripheral organs and microglial migration in a dose-dependent manner in rat substantia nigra. |
| Databáze: | OpenAIRE |
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