Interleukin-1β inhibits the amplitudes of voltage-gated Na(+) currents and action potential in cultured cortical neurons of rat.
- Author:
Cui QI
1
;
Wei-Wei ZHANG
;
Xiao-Nan LI
;
Chen ZHOU
Author Information
1. The College of Life Sciences, Hebei University, Baoding 071002, China.
- Publication Type:Journal Article
- MeSH:
Action Potentials;
physiology;
Animals;
Cells, Cultured;
Cerebral Cortex;
cytology;
physiology;
Interleukin-1beta;
pharmacology;
Neurons;
cytology;
physiology;
Rats;
Rats, Sprague-Dawley;
Voltage-Gated Sodium Channels;
physiology
- From:
Acta Physiologica Sinica
2011;63(2):131-137
- CountryChina
- Language:Chinese
-
Abstract:
Interleukin-1β (IL-1β) is an important proinflammatory cytokine and plays key roles in physiological and pathophysiological processes of central nervous system (CNS). The voltage-gated Na(+) channels are essential for electrical properties of excitable cells and control the excitability and action potential (AP) of neurons. Recent studies have showed the relationship between IL-1β and voltage-gated channels. In this work, cultured cortical neurons of rat were treated by 10 ng/mL of IL-1β for 24 h, and then voltage-gated Na(+) currents were recorded using voltage-clamp technique. The results indicated that IL-1β reduced the amplitude of Na(+) currents without any changes in activation or inactivation properties. The current-clamp recording showed that IL-1β reduced the amplitude of AP but not the threshold. These data indicate that IL-1β inhibits the voltage-gated Na(+) currents and the amplitude of AP, and suggest that essential roles of voltage-gated Na(+) channels may be changed by IL-1β. New information about effects of IL-1β on injuries and diseases of CNS was provided.
