关键词: 蛋白激酶Cγ亚单位;延髓背角;脊髓背角;孤束核;伤害性感受;大鼠

    中图号:R322.81

    摘 要:目的 观察延髓和脊髓背角内蛋白激酶Cγ亚单位(PKCγ)阳性神经元向孤束核的投射. 方法 荧光金(FG)逆行追踪与PKCγ的免疫荧光组织化学染色相结合的双标记技术. 结果 PKCγ阳性神经元主要分布于延髓和脊髓背角的Ⅰ，Ⅱ，Ⅲ层及脊髓的外侧脊核;将FG注入孤束核后，在延髓和脊髓背角的Ⅰ，Ⅱ，Ⅲ层及脊髓的外侧脊核内可见FG标记神经元;部分FG标记神经元呈PKCγ阳性，FG/PKCγ双标神经元也主要见于延髓和脊髓背角的Ⅰ，Ⅱ，Ⅲ层及脊髓的外侧脊核. 结论 延髓和脊髓背角的PKCγ阳性神经元可能参与将躯体和内脏伤害性刺激信息向孤束核的传递.

    PKCγ┐containing neurons in the medullary and spinal dorsal horns projecting to the rat solitary tract nucleus

    WU Li-Ping，LI Hui，LI Yun-Qing，ZHANG Yuan-Qiang

    Hui-Bin Wards，Xijing Hospital，Department of Anatomy and K.K.Leung Brain Research Centre，Department of Histology and Embryology，Faculty of Preclinical Medicine，Fourth Military Medical University，Xi'an710033，China

    Keywords:PKCγ;medullary dorsal horn;spinal dorsal horn;solitary tract nucleus;nociception;rat

    Abstract:AIM To examine the projection of protein kinase Cγisoform(PKCγ)-immunoreactive neurons from the medullary and spinal dorsal horns to the solitary tract nucleus in the rat.METHODS Fluoro-gold(FG)retrograde tracing combined with immunofluorescence histochemical staining for PKCγwas used.RESULTS PKCγ-immunoreactive neurons were observed in laminaeⅠ ......