Objective To observe the effects of y-aminobutyric acid （GABA） on the electric activities of pain-excited neurons （PEN） in nucleus accumbens （NAc） in central nervous system （CNS） of morphine-dependent rats. Me...
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Objective To observe the effects of y-aminobutyric acid （GABA） on the electric activities of pain-excited neurons （PEN） in nucleus accumbens （NAc） in central nervous system （CNS） of morphine-dependent rats. Methods After GABA or the GABAA-receptor antagonist, bicuculline （Bic）, was injected into cerebral ventricles or NAc, right sciatic nerve was stimulated by electrical pulses, which was considered as traumatic pain stimulation. Extracellular recordings methods were used to record the electric activities of PEN in NAc. Results When GABA was injected into intracerebroventricle （ICV） as well as NAc, it could decrease the pain-evoked discharge frequency and prolong the latency of PEN. Bic could interdict the above effects of GABA on the electric activities of PEN. Conclusion Exogenous GABA might have an inhibitory effect on the central pain adjustment. Furthermore, GABA and GABAA receptor participate and mediate the traumatic information transmission process in CNS.
目前,对于肝癌(hepatocellular carcinoma,HCC)早期检测中放射成像技术无法确定的结节,通常需要通过活检取样来进行组织病理学鉴定。然而,一些早期肝癌组织中所呈现的病理改变微小难辨,活检取样时也经常会出现未取到癌组织而漏检的情况。针对这些临床上肝癌早期诊断的困难,同时为了应对基因表达谱检测批次效应等对分类结果的影响,作者提出了利用癌旁组织中基因表达的秩序关系来鉴别早期肝癌及癌前病变的方法。首先找出在肝癌患者的肝硬化组织(cirrhosis tissue in patients with HCC,wHCC)和非肝癌患者的肝硬化组织(cirrhosis tissue in patients without HCC,woHCC)间基因表达值的相对秩序发生逆转的基因对,然后,借用大样本的肝癌组织表达谱数据筛选出HCC及wHCC中表达相对秩序一致的基因对,再基于这些基因对发展能将HCC、wHCC与woHCC进行鉴别的分类器。结果显示,该分类器对来自不同平台、不同实验室的验证集都有稳健的分类能力,可以用于早期肝癌的辅助鉴别诊断。
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