• Zhonghua yi xue za zhi · Feb 2012

    [Changes of glycogen synthase kinase-3β and its phosphorylation in spinal cord neurons in rats with incisional pain-remifentanil-induced hyperalgesia].

    • Yuan Yuan, Jing-Yao Wang, Fang Yuan, Yong-Hao Yu, and Guo-Lin Wang.
    • Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin, China.
    • Zhonghua Yi Xue Za Zhi. 2012 Feb 21;92(7):435-9.

    ObjectiveTo investigate the change in glycogen synthase kinase-3β (GSK-3β) in spinal cord neurons in rats with incisional pain (IP)-remifentanil-induced hyperalgesia.Methods32 SD male rats (240 - 260 g) were randomly divided into 4 groups (n = 8 each): group R, group I, group R + I and group C. IP was established as Brennan's description. Paw withdrawal threshold (PWT) and paw withdrawal latency (PWL) were measured 24h before anesthesia and 2, 6, 24, 48 h after anesthesia. The rats were sacrificed after the last threshold measurement. The expressions of GSK-3β mRNA in rats' spinal cord neurons were determined by real-time PCR. The expressions of GSK-3β and pGSK-3β in rats' spinal cord neurons were determined by Western blot.ResultsRemifentanil-induced hyperalgesia developed in group R, I and R + I. The expression of GSK-3β mRNA and the expression of GSK-3β in rats' spinal cord neurons were highest in group R + I. In addition, the ratio of pGSK-3β/GSK-3β was smallest in group R + I.ConclusionThese data indicate that the increased GSK-3β activity in rats spinal cord neurons is involved in remifentanil-induced hyperalgesia.

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