肝硬化大鼠脊髓内一氧化氮合酶阳性神经元分布的研究

目的探讨肝硬化对神经系统所产生的影响及肝硬化大鼠在脊髓中NOS量效关系,即肝硬化大鼠脊髓内一氧化氮合酶分布的研究。方法采用NADPH鄄d组化法及LeicaQ500IW图像分析系统对肝硬化大鼠脊髓颈、胸、腰段一氧化氮合酶阳性细胞进行数量及灰度的测定。结果正常组与肝硬化组分为两个等级:低密区和高密区,低密区灰度定为60,高密区为90,两组Wistar大鼠NOS阳性神经元灰度均为60,差异无显著性。在脊髓灰质区,一氧化氮合酶阳性细胞主要分布在中央管周围即脊髓板层第Ⅹ层和中间外侧核。NADPH鄄d呈色为强阳性,细胞形态多为三角形和梭形,胞核不着色,胞质色深。细胞中等大小,以25μm为主。在脊髓颈、胸、腰各段灰质中间带NOS阳性细胞分布的数量基本相等,没有特异性变化。结论肝硬化大鼠与正常大鼠一氧化氮合酶的表达在脊髓内是相同的。NOS在脊髓节段的分布特性可能说明肝硬化大鼠低级交感神经的调控与正常无异。

Study of distribution of nitric oxide synthase positive neurons in spinal cord of rats with cirrhosis of liver

Objective To observe the nitric oxide synthase(NOS) positive neurons and distribution of NOS fibers in spinal cord of rats with cirrhosis of liver. Methods The quantity of NOS positive neurons in the cervical segment, thoracal segment and lumbar segment spinal cord of rats with cirrhosis of liver were analyzed by NADPH-d and image analysis system. Results In gray matter of spinal cord, the NOS positive neurons distributed mostly around central canal(lamina Ⅹ) and intermediolateral nucleus. Conclusion The distribution of the NOS positive neurons in the spinal cord of the rats with cirrhosis of liver were same as the normal rats'.