目的:本文选择Ha Ca T角质形成细胞测定花椒挥发油对其细胞膜流动性和膜电位的影响及其机制,研究花椒挥发油对皮肤活性表皮的影响,探讨其促进药物透皮吸收的作用机制。方法:采用CCK-8试验测定花椒挥发油的细胞毒性,利用荧光漂白恢复技术...目的:本文选择Ha Ca T角质形成细胞测定花椒挥发油对其细胞膜流动性和膜电位的影响及其机制,研究花椒挥发油对皮肤活性表皮的影响,探讨其促进药物透皮吸收的作用机制。方法:采用CCK-8试验测定花椒挥发油的细胞毒性,利用荧光漂白恢复技术(FRAP)考察不同浓度花椒挥发油对细胞膜流动性的影响,采用流式细胞仪测定不同浓度花椒挥发油对细胞膜电位的改变,同时考察了花椒挥发油对Ha Ca T细胞内Ca2+浓度的影响,采用超微量Ca2+-ATP酶试剂盒测定花椒挥发油对Ha Ca T细胞内Ca2+-ATP酶活性的影响。结果:相对于常用化学促透剂氮酮,花椒挥发油具有较低细胞毒性,花椒挥发油可增加Ha Ca T细胞膜流动性、降低细胞膜电位,同时可降低Ca2+-ATP酶活性、增加Ha Ca T细胞内Ca2+浓度而影响细胞Ca2+平衡。结论:花椒挥发油可能通过改变细胞内Ca2+平衡而影响细胞膜流动性及膜电位,增加活性表皮流动性以降低皮肤表皮屏障作用,从而利于药物的透皮吸收。展开更多
After bilateral carotid artery occlusion for 30 minutes and reperfusion for 2 hours, distinct pathological changes presented in the cerebral cortex and cerebellum of rats. Compared with normal rats, nerve cell membran...After bilateral carotid artery occlusion for 30 minutes and reperfusion for 2 hours, distinct pathological changes presented in the cerebral cortex and cerebellum of rats. Compared with normal rats, nerve cell membrane fluidity significantly decreased in ischemia/reperfusion rats as detected by spin-labeling electron spin resonance, consistent with order parameter S and rotational correlation time TC measurements. Brain nerve cells from rats with ischemia/reperfusion injury were cultured with 1-100 mg/mL Buyang Huanwu decoction. Results showed that Buyang Huanwu decoction gradually increased membrane fluidity dose-dependently to normal levels, and eliminated hydroxide （OH＇） and superoxide （O2＇） free radicals dose-dependenUy. These findings suggest that Buyang Huanwu decoction can protect against cell membrane fluidity changes in rats with ischemia/ reperfusion injury by scavenging free radicals.展开更多
We studied the effect of all-trans-retinoic acid (RA)on the expression of several surface lectin receptors and cell membrane fluidity of mouse forestomach carcinoma cell line (MFC) in vitro. The results showed that ce...We studied the effect of all-trans-retinoic acid (RA)on the expression of several surface lectin receptors and cell membrane fluidity of mouse forestomach carcinoma cell line (MFC) in vitro. The results showed that cells treated with RA manifested decreased expression of lectin receptors, increased memhrane fluidity and reduced spontaneous metastasis. These results suggest that the effect of RA on tumor cell membrane may be one of the mechanisms involved in the alternation of cell metastatic phenotype.展开更多
文摘目的:本文选择Ha Ca T角质形成细胞测定花椒挥发油对其细胞膜流动性和膜电位的影响及其机制,研究花椒挥发油对皮肤活性表皮的影响,探讨其促进药物透皮吸收的作用机制。方法:采用CCK-8试验测定花椒挥发油的细胞毒性,利用荧光漂白恢复技术(FRAP)考察不同浓度花椒挥发油对细胞膜流动性的影响,采用流式细胞仪测定不同浓度花椒挥发油对细胞膜电位的改变,同时考察了花椒挥发油对Ha Ca T细胞内Ca2+浓度的影响,采用超微量Ca2+-ATP酶试剂盒测定花椒挥发油对Ha Ca T细胞内Ca2+-ATP酶活性的影响。结果:相对于常用化学促透剂氮酮,花椒挥发油具有较低细胞毒性,花椒挥发油可增加Ha Ca T细胞膜流动性、降低细胞膜电位,同时可降低Ca2+-ATP酶活性、增加Ha Ca T细胞内Ca2+浓度而影响细胞Ca2+平衡。结论:花椒挥发油可能通过改变细胞内Ca2+平衡而影响细胞膜流动性及膜电位,增加活性表皮流动性以降低皮肤表皮屏障作用,从而利于药物的透皮吸收。
基金supported by the Doctor Foundation(2008) in Shanxi Datong University
文摘After bilateral carotid artery occlusion for 30 minutes and reperfusion for 2 hours, distinct pathological changes presented in the cerebral cortex and cerebellum of rats. Compared with normal rats, nerve cell membrane fluidity significantly decreased in ischemia/reperfusion rats as detected by spin-labeling electron spin resonance, consistent with order parameter S and rotational correlation time TC measurements. Brain nerve cells from rats with ischemia/reperfusion injury were cultured with 1-100 mg/mL Buyang Huanwu decoction. Results showed that Buyang Huanwu decoction gradually increased membrane fluidity dose-dependently to normal levels, and eliminated hydroxide （OH＇） and superoxide （O2＇） free radicals dose-dependenUy. These findings suggest that Buyang Huanwu decoction can protect against cell membrane fluidity changes in rats with ischemia/ reperfusion injury by scavenging free radicals.
文摘We studied the effect of all-trans-retinoic acid (RA)on the expression of several surface lectin receptors and cell membrane fluidity of mouse forestomach carcinoma cell line (MFC) in vitro. The results showed that cells treated with RA manifested decreased expression of lectin receptors, increased memhrane fluidity and reduced spontaneous metastasis. These results suggest that the effect of RA on tumor cell membrane may be one of the mechanisms involved in the alternation of cell metastatic phenotype.
