Paeoniflorin inhibits functional responses of rat cerebellar Purkinje cells to acute hypoxia insult / 中国病理生理杂志
Chinese Journal of Pathophysiology
;
(12): 664-668, 2015.
Article
in Chinese
| WPRIM
| ID: wpr-461497
ABSTRACT
[ ABSTRACT] AIM:
To investigate the effects of paeoniflorin ( Pae) on the functional responses induced by acute hypoxic insult in the rat cerebellar Purkinje cells ( PCs) .METHODS:
The whole-cell patch clamp was used for the intra-cellular recording of PCs in the rat cerebellar slices to evaluate the changes of membrane potential, the excitability of PCs, and the parallel fibre ( PF)-PC excitatory postsynaptic currents ( EPSCs) upon acute hypoxic insult alone or with the pre-sence of Pae.RESULTS:
PCs showed an initial hyperpolarization followed by brief depolarization and long lasting post-hy-poxia hyperpolarization after hypoxia exposure.Pae completely blocked hypoxia-induced hyperpolarization and decreased the amplitude and the duration of hypoxic depolarization.Hypoxia up-regulated the excitability of rat PCs.Pae didn’t show any significant effect on the hypoxia-induced hyperexcitability in PCs.Acute hypoxia induced long-term depression ( LTD) in rat cerebellar PF-PC EPSCs, and Pae partially reversed hypoxia-induced depression in PF-PC EPSCs.CONCLUSION:
Pae significantly suppresses hypoxia-induced responses in rat PCs and probably increases the tolerance of rat PCs to acute hypoxia.
Full text:
Available
Index:
WPRIM (Western Pacific)
Language:
Chinese
Journal:
Chinese Journal of Pathophysiology
Year:
2015
Type:
Article
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