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Published on: August 26, 2014
[Militarine alleviates white matter damage and cognitive impairment in rats with chronic cerebral hypoperfusion]
Abstract:
Chronic cerebral hypoperfusion is a model for white matter lesions (WMLs) and cognitive impairment. In this study, we used the model in testing the protective effect of (-)-(2R)-1-[(4-β-D-glucopyranosyloxy)benzyl]-4-[4-(β-D-glucopyranosyloxy)benzyl]-2-isobutyl malate (militarine) on the white matter damaged. The model was established by bilateral common carotid ligation. Militarine (10 and 20 mg·kg(-1)·d(-1)) or saline was intragastrically administered daily for 30 days following the operation. Militarine (20 mg·kg-1·d-1)-treated rats exhibited significantly shorter escape latency, latency of the first time crossing and more numbers of platform crossings in Morris water maze task. Luxol fast blue (LFB) staining and Western blot analysis indicated that militarine promoted rehabilitation of white matter and increased levels of myelin basic protein (MBP) in the rats. Immunohistochemical staining for 2’,3’-cyclic-nucleotide 3’-phosphodiesterase (CNPase) revealed that militarine (20 mg·kg(-1)·d(-1)) markedly suppressed loss of CNPase-positive oligodendrocytes in the rat model. In conclusion, militarine can improve WMLs and cognitive impairment in the rat chronic hypoperfusion model.
Insights
Militarine, a novel compound, effectively protected against white matter lesions and cognitive impairment in a rat model of chronic cerebral hypoperfusion. This suggests potential therapeutic benefits for conditions involving brain white matter damage.
Area of Science:
- Neuroscience
- Pharmacology
- Biochemistry
Background:
- Chronic cerebral hypoperfusion models white matter lesions (WMLs) and cognitive impairment.
- Understanding protective agents for WMLs is crucial for neurological health.
Purpose of the Study:
- To investigate the protective effects of militarine against white matter damage and cognitive deficits in a rat model of chronic cerebral hypoperfusion.
- To evaluate militarine's impact on myelin repair and oligodendrocyte survival.
Main Methods:
- Chronic cerebral hypoperfusion model induced by bilateral common carotid ligation in rats.
- Administration of militarine (10 and 20 mg·kg(-1)·d(-1)) or saline for 30 days.
- Behavioral testing (Morris water maze), Luxol fast blue staining, Western blot for myelin basic protein (MBP), and immunohistochemistry for 2’,3’-cyclic-nucleotide 3’-phosphodiesterase (CNPase).
Main Results:
- Militarinetreated rats showed improved cognitive function, evidenced by shorter escape latency and increased platform crossings.
- Luxol fast blue staining and Western blot revealed militarine promoted white matter rehabilitation and increased MBP levels.
- Immunohistochemistry demonstrated that militarine suppressed the loss of CNPase-positive oligodendrocytes.
Conclusions:
- Militarine demonstrates significant protective effects against white matter lesions and cognitive impairment in a rat model of chronic cerebral hypoperfusion.
- Militarine promotes white matter repair and protects oligodendrocytes, suggesting therapeutic potential for hypoperfusion-induced brain injury.
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