目的探讨人源D-酪氨酰tRNA脱酰基酶(h-DTD)对人神经母细胞瘤细胞SH-SY5Y的非选择性阳离子通道通透性的影响。方法利用毛细管电泳法检测原核表达纯化的h-DTD的体外脱酰酶活性;用W estern b lot法分析h-DTD在各组织和细胞中的表达谱;用膜...
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目的探讨人源D-酪氨酰tRNA脱酰基酶(h-DTD)对人神经母细胞瘤细胞SH-SY5Y的非选择性阳离子通道通透性的影响。方法利用毛细管电泳法检测原核表达纯化的h-DTD的体外脱酰酶活性;用W estern b lot法分析h-DTD在各组织和细胞中的表达谱;用膜片钳技术检测SH-SY5Y细胞全细胞电位。结果h-DTD具有体外脱酰酶活性,并在脑组织中高表达。在h-DTD蛋白存在的情况下,游离的D-氨基酸及L谷-氨酸能激活谷氨酸敏感的非选择性阳离子通道,导致细胞膜通透性增加。结论在神经系统,h-DTD蛋白可能通过维持游离D-氨基酸的浓度来影响非选择性阳离子通道的功能。
The adhesion of cells to each other and to the proteins of the extracellular matrix provides a stable environment for cell growth, differentiation and migration. This is a prerequisite for the normal function of the c...
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The adhesion of cells to each other and to the proteins of the extracellular matrix provides a stable environment for cell growth, differentiation and migration. This is a prerequisite for the normal function of the cardiovascular system. Thus the abnormal adhesion function may play a key role in the pathogenesis and development of cardiovascular diseases. To date, there are six main groups of adhesion molecule, and integrins family are the largest and most broadly distributed of the families of cellular adhesion receptors. They have an important role in several aspects of cardiovascular diseases and that its regulated inhibition leads to a reduction in incidence and mortality due to these disorders. This review focuses upon the structure、mechanism and their roles in cardiovascular diseases which maybe facilitate the development of novel therapies.
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