Pulmonary artery hypertension is a serious disease in respiratory system and a key tache in the mechanism of pulmonary-heart disease. The pathological changes include the contraction and remodeling of the pulmonary ve...
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Pulmonary artery hypertension is a serious disease in respiratory system and a key tache in the mechanism of pulmonary-heart disease. The pathological changes include the contraction and remodeling of the pulmonary vessels. There are more and more studies on the pulmonary artery hypertension because of its refractory character and the following increasing mortality. This article summarizes the updating research of the factors and mechanism studied on pulmonary artery hypertension recently,to provide a new view for the clinical and basic medical investigation.
Objective Urine is a promising biomarker source for clinical proteomics *** physiological differences are common in multi-center clinical *** this study,we investigate whether significant differences are present in th...
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Objective Urine is a promising biomarker source for clinical proteomics *** physiological differences are common in multi-center clinical *** this study,we investigate whether significant differences are present in the urinary proteomes of individuals from different regions in *** In this study,morning urine samples were collected from healthy urban residents in three regions of China(Haikou,Xi’an and Xining)and urinary proteins were preserved using a membrane-based method(Urimem).The urine proteomes of 27 normal samples were analyzed using LC-MS/MS and compared among three *** annotation of the differential proteins among the three areas was analyzed using the DAVID online database,and pathway enrichment of the differential urinary proteins was analyzed using *** We identified 1898 proteins from Urimem samples using label-free proteome quantification,of which 56 urine proteins were differentially expressed among the three regions(P<0.05).Hierarchical clustering analysis showed that inter-regional differences caused less significant changes in the urine proteome than intersex *** gender stratification,16 differential proteins were identified in male samples and 84 differential proteins were identified in female *** these differential proteins,several proteins have been previously reported as urinary disease *** Urimem will facilitate urinary protein storage for large-scale urine sample *** differences are a confounding factor influencing the urine proteome and should be considered in future multicenter biomarker studies.
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。
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