轴突
谷氨酸受体
坐骨神经
甘氨酸
内分泌学
内科学
神经损伤
化学
神经递质
轴浆运输
神经病理性疼痛
收缩
氨基酸
神经科学
麻醉
生物
生物化学
中枢神经系统
医学
受体
作者
David L. Somers,F. Richard Clemente
标识
DOI:10.1016/s0304-3940(02)00157-x
摘要
The present study directly examined the axon terminal (synaptosomal) level of amino acid neurotransmitters in rats following chronic constriction injury (CCI) to the sciatic nerve. Dorsal horn, synaptosomal content of aspartate (Asp), glutamate (Glu), glycine and gamma-aminobutyric acid (GABA) was assessed in these rats, and in normal age-matched and younger rats. The synaptosomal content of Asp and Glu in CCI rats was increased by 44-46% compared with control rats (P<0.016). The synaptosomal content of GABA in younger rats was 33% lower than that observed in control rats (P<0.005). Altered axon terminal levels of amino acid neurotransmitters accompany the painful symptoms of neuropathy. The lower axon terminal level of GABA in younger rats may help to explain the age-dependency of pain development in animal models of nerve injury.
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