51. Soluble fiber enhances recovery from LPS-induced social withdrawal in a manner dependent on IL-4

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• 作者：Christina Sherry ; Stephanie Kim ; Ryan Dilger ; George Fahey ; Kelly Tappenden ; Gregory Freund
• 关键词：kcnq2 ; erg1 ; erg3 ; Seizures ; Pyriform cortex
• 刊名：Brain, Behavior, and Immunity
• 出版年：2008
• 出版时间：May 2008
• 年：2008
• 卷：22
• 期：4, Supplement 1
• 页码：15
• 全文大小：136 K

文摘

The mechanisms by which stress and electroconvulsive therapy exert opposite effects on the course of major depression are not known. Potential candidates might include the voltage-dependent potassium channels. Potassium channels play an important role in maintaining the resting membrane potential and controlling neuronal excitability. To explore this hypothesis, we examined the effects of one or several electroconvulsive stimulations and chronic restraint stress (6 h/day for 21 days) on the expression of voltage-dependent potassium channel Kv7.2, Kv11.1, and Kv11.3 mRNA in the rat brain using in situ hybridization. Repeated, but not acute, electroconvulsive stimulation increased Kv7.2 and Kv11.1 mRNA levels in the piriform cortex. In contrast, restraint stress had no significant effect on mRNA expression of Kv7.2, Kv11.1, or Kv11.3 in any of the brain regions examined. Thus, it appears that the investigated voltage-dependent potassium channels are not modulated by restraint stress at the level of mRNA expression. However, our findings suggest that repeated electroconvulsive stimulation alter Kv7.2 and Kv11.1 function in the piriform cortex, a finding with potential relevance for the chain of neurobiological events underlying the clinical effects of ECT.