目的探究锌转运蛋白6(solute carrier family 30 member 6,SLC30A6)对人肝癌细胞系Huh7增殖、迁移和侵袭能力的影响,并利用虚拟筛选技术从中国天然产物数据库(CNPD)中筛选HCC中针对SLC30A6的潜在中药小分子抑制剂。方法通过TCGA和ICGC...
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目的探究锌转运蛋白6(solute carrier family 30 member 6,SLC30A6)对人肝癌细胞系Huh7增殖、迁移和侵袭能力的影响,并利用虚拟筛选技术从中国天然产物数据库(CNPD)中筛选HCC中针对SLC30A6的潜在中药小分子抑制剂。方法通过TCGA和ICGC数据集,分析SLC30A6在肝细胞癌(HCC)中的表达水平、临床特征及预后价值。采用慢病毒转染Huh7细胞敲低SLC30A6,通过CCK-8、EdU实验、细胞划痕实验和Transwell实验评估其对Huh7细胞的增殖、迁移和侵袭能力的影响。同时,检测其对HCC肿瘤干细胞标记物(CD44、CD133、CD90)的调控作用。基于CNPD数据库,以SLC30A6为药物靶点,运用基于对接的虚拟筛选技术进行多轮筛选,包括高通量虚拟筛选、标准精度虚拟筛选、高精度虚拟筛选,筛选出具有良好靶向性和类药性的潜在药物。 结果 SLC30A6在HCC组织中表达上调。SLC30A6的高表达与HCC患者较高的病理分期、组织学分级和甲胎蛋白水平、血管侵犯状态以及不良预后相关。敲低SLC30A6可明显抑制肝癌细胞Huh7的增殖、迁移及侵袭能力,并降低肿瘤干细胞标记物水平。通过虚拟筛选,共筛选出了6个潜在的小分子抑制剂。 结论 本研究证实SLC30A6在HCC的增殖、迁移及侵袭中的作用。SLC30A6可作为潜在的HCC预后生物标志物和治疗靶点。
Objective Concentration of extracellular calcium ([Ca2+]o) in the central nervous system decreases substantially in different conditions. It results in facilitating neuronal excitability. The goal of this study is ...
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Objective Concentration of extracellular calcium ([Ca2+]o) in the central nervous system decreases substantially in different conditions. It results in facilitating neuronal excitability. The goal of this study is to examine the mechanisms of enhanced neuronal excitation in low [Ca2+]o in order to provide new clues to treat the hyperexcitability diseases in clinic. Methods Whole-cell patch-clamp technique and neuron culture were used in the study. Results The firing threshold of cultured hippocampal neurons decreased markedly in low [Ca2+]o saline. Unexpectedly, apamine and isoprenaline, antagonists of medium afterhyperpolarization (mAHP) and slow AHP (sAHP) respectively, had no statistic significant effect on excitability of neurons. TTX at a low concentration was sufficient to inhibit/Nap, which blocked the increase of firing frequency in low [Ca2+]o. It also reduced the number of spikes in normal [Ca2+]o. Conclusion These results suggest that in cultured hippocampal neurons, modulation of spiking threshold but not AHP may cause the increased excitability in low [Ca2+]o.
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