Minocycline protects against lipopolysaccharide-induced cognitive impairment in mice
| Autor: | Guanbo Xie, Xia Liu, Bing Wang, Yue Hou, Jinghua Xu, Congcong Jia, Guoxun Li |
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| Rok vydání: | 2015 |
| Předmět: |
0301 basic medicine
Lipopolysaccharides Male Microinjections Interleukin-1beta Morris water navigation task Minocycline Biology Pharmacology Neuroprotection Hippocampus 03 medical and health sciences Mice 0302 clinical medicine Glial Fibrillary Acidic Protein medicine Animals RNA Messenger Maze Learning Neuroinflammation Microglia Tumor Necrosis Factor-alpha Macrophages Calcium-Binding Proteins Microfilament Proteins Spontaneous alternation Mice Inbred C57BL 030104 developmental biology medicine.anatomical_structure Neuroprotective Agents Immunology Neuroglia Cytokines Cell activation Cognition Disorders 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | Psychopharmacology. 233(5) |
| ISSN: | 1432-2072 |
| Popis: | The role of glial cells, especially microglia and astrocytes, in neuroinflammation and cognition has been studied intensively. Lipopolysaccharide (LPS), a commonly used inducer of neuroinflammation, can cause cognitive impairment. Minocycline is known to possess potent neuroprotective activity, but its effect on LPS-induced cognitive impairment is unknown. This study aims to investigate the effects of minocycline on LPS-induced cognitive impairment and glial cell activation in mice. Behavioral tests were conducted for cognitive function, immunohistochemistry for microglial and astrocyte response, and quantitative PCR for mRNA expression of proinflammatory cytokines. Minocycline significantly reversed the decreased spontaneous alternation induced by intrahippocampal administration of LPS in the Y-maze task. In the Morris water maze place navigation test, minocycline decreased the escape latency and distance traveled compared to LPS-treated mice. In the probe test, minocycline-treated mice spent more time in the target quadrant and crossed the platform area more frequently than animals in the LPS-treated group. Minocycline produced a significant decrease in the number of Iba-1- and GFAP-positive hippocampal cells compared to the LPS-treated group. Minocycline-treated mice had significantly reduced hippocampal TNF-α and IL-1β mRNA levels compared with LPS-treated animals. Minocycline caused a significant increase in hippocampal BDNF expression compared to the LPS-treated group. Minocycline can attenuate LPS-induced cognitive impairments in mice. This effect may be associated with its action to suppress the activation of microglia and astrocytes and to normalize BDNF expression. Since neuroinflammatory processes and cognitive impairments are implicated in neurodegenerative disorders, minocycline may be a promising candidate for treating such diseases. |
| Databáze: | OpenAIRE |
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