The effect of lanthanum and calcium on the structure and function of human erythrocyte membranes was investigated by fluorescence polarization, spin- labeled electron spin resonance (ESR) and laser Raman spectroscopy....The effect of lanthanum and calcium on the structure and function of human erythrocyte membranes was investigated by fluorescence polarization, spin- labeled electron spin resonance (ESR) and laser Raman spectroscopy. The results showed that low concentration of La3+ (0.5 mu mol/L) activated a Little (Na++K+)-ATPase and Mg2+-ATPase activities, and it inhibited obvi ously the ATPase activities with increasing its concentrations. La3+ lowered the lipid fluidity of human erythrocyte membranes and decreased the vibration intensity of alpha-helix of the protein in the Amide I '. The effect of Ca2+ on the lipid fluidity and alpha-helix of the protein in the Amide I ' was smaller than that of La3+.展开更多
Using experimental model of pregnant rats with asymmetrical intrauterine fetal growth retardation induced by passive smoking, the effects of natural herb 'Jia Wei Fo Shou San' on erythrocyte membrane calcium, ...Using experimental model of pregnant rats with asymmetrical intrauterine fetal growth retardation induced by passive smoking, the effects of natural herb 'Jia Wei Fo Shou San' on erythrocyte membrane calcium, zinc concentration were observed by atomic absorption spectrophotometry. The results showed that the mean fetal birth weight, zinc concentration of erythrocyte membrane were found to be decreased in the model group as compared with the control group (P<0. 01, P<0. 01). On the other hand, the element of calcium onto erythrocyte membrane were higher in model group than that in control group(P<0. 05). These changes were significantly mild in the treated group and were similar to those of the control group (P<0.05). Furthermore,our findings indicated that the zinc concentration of erythrocyte membrane seems to be positively correlated with the birth weight(P<0. 01). Calcium composition of red cell membrane showed a significant negative relation to the birth weight (P<0.05). Our results provided an experimental evidence that normal concentrations of calcium and zinc onto erythrocyte play an important part in fetal growth. One of the mechanisms of 'Jia Wei Fo Shou San' in improving fetal growth may have something to do with modulation of erythrocyte calcium,zinc element,thereby protecting bio-functions of erythrocyte and promoting blood circulation.展开更多
The calcium binding of erythrocyte membrane was determined in spontaneous hypertensiverats (SHR)and renovascular hypertensive rats (RVHR two-kidney, one-clip model) and the effect ofsodium tanshinone Ⅱ-A sulfonate(DS...The calcium binding of erythrocyte membrane was determined in spontaneous hypertensiverats (SHR)and renovascular hypertensive rats (RVHR two-kidney, one-clip model) and the effect ofsodium tanshinone Ⅱ-A sulfonate(DS-201)on the calcium binding in SHRs was investigated. Ourresults show that the basal calcium binding was reduced in SHRs (P<0.01 vs WKY),while the maximalcalcium binding was not,but both typies calcium bindings had no significant change in RVHRs.Sodiumtanshinone Ⅱ-A sulfonate (125μ mol/L)have no effect on the calcium binding of ecythrocyte membraneof SHR in vitro.These data further support the hypothesis that there is a cell membrane abnormalitypresent in SHRs which may possibly serve as a marker genetics of in hypertension.展开更多
Marsdeniae tenacissimae extract (MTE) has been used as an adjuvant medicine for cancer therapy for a long time. Although massive studies demonstrated its considerable anti-cancer effect, there is no research on its ...Marsdeniae tenacissimae extract (MTE) has been used as an adjuvant medicine for cancer therapy for a long time. Although massive studies demonstrated its considerable anti-cancer effect, there is no research on its influence on erythrocytes, which are firstly interacted with MTE in the circulation. To investigate the influence of MTE on erythrocytes, we used a flow cytometer to detect the MTE-treated alternations of morphology, calcium concentration, and reactive oxygen species (ROS) level in erythrocytes. We used hemolysis under different osmotic solutions to evaluate the fragility of erythrocytes. Data showed that MTE treatment dose-dependently increased the ratio of erythrocyte fragmentation (P〈0.001) and shrinking, and elevated the forward scatter (FSC) value (P〈0.001) and calcium accumulation (P〈0.001). MTE induced ROS production of erythrocytes under the high glucose condition (P〈0.01) and consequently caused a rise in fragility (P〈0.05). These results suggest that MTE induces cytotoxicity and aging in erythrocytes in a dose-dependent manner, and presents the possibility of impairment on cancer patients' circulating erythrocytes when MTE is used as an anti-cancer adjuvant medicine.展开更多
文摘The effect of lanthanum and calcium on the structure and function of human erythrocyte membranes was investigated by fluorescence polarization, spin- labeled electron spin resonance (ESR) and laser Raman spectroscopy. The results showed that low concentration of La3+ (0.5 mu mol/L) activated a Little (Na++K+)-ATPase and Mg2+-ATPase activities, and it inhibited obvi ously the ATPase activities with increasing its concentrations. La3+ lowered the lipid fluidity of human erythrocyte membranes and decreased the vibration intensity of alpha-helix of the protein in the Amide I '. The effect of Ca2+ on the lipid fluidity and alpha-helix of the protein in the Amide I ' was smaller than that of La3+.
文摘Using experimental model of pregnant rats with asymmetrical intrauterine fetal growth retardation induced by passive smoking, the effects of natural herb 'Jia Wei Fo Shou San' on erythrocyte membrane calcium, zinc concentration were observed by atomic absorption spectrophotometry. The results showed that the mean fetal birth weight, zinc concentration of erythrocyte membrane were found to be decreased in the model group as compared with the control group (P<0. 01, P<0. 01). On the other hand, the element of calcium onto erythrocyte membrane were higher in model group than that in control group(P<0. 05). These changes were significantly mild in the treated group and were similar to those of the control group (P<0.05). Furthermore,our findings indicated that the zinc concentration of erythrocyte membrane seems to be positively correlated with the birth weight(P<0. 01). Calcium composition of red cell membrane showed a significant negative relation to the birth weight (P<0.05). Our results provided an experimental evidence that normal concentrations of calcium and zinc onto erythrocyte play an important part in fetal growth. One of the mechanisms of 'Jia Wei Fo Shou San' in improving fetal growth may have something to do with modulation of erythrocyte calcium,zinc element,thereby protecting bio-functions of erythrocyte and promoting blood circulation.
文摘The calcium binding of erythrocyte membrane was determined in spontaneous hypertensiverats (SHR)and renovascular hypertensive rats (RVHR two-kidney, one-clip model) and the effect ofsodium tanshinone Ⅱ-A sulfonate(DS-201)on the calcium binding in SHRs was investigated. Ourresults show that the basal calcium binding was reduced in SHRs (P<0.01 vs WKY),while the maximalcalcium binding was not,but both typies calcium bindings had no significant change in RVHRs.Sodiumtanshinone Ⅱ-A sulfonate (125μ mol/L)have no effect on the calcium binding of ecythrocyte membraneof SHR in vitro.These data further support the hypothesis that there is a cell membrane abnormalitypresent in SHRs which may possibly serve as a marker genetics of in hypertension.
基金Project supported by the Zhejiang Provincial Natural Science Foundation(Nos.LQ16H070003,LY15H280010,and LY15C090004)the Key Project of Chinese Medicine in Zhejiang Province(No.2015ZZ001)+2 种基金the Traditional Chinese Medicine Scientific Research Foundation of Zhejiang Province(No.2014ZB007)the Traditional Chinese Medicine Outstanding Young Talent Foundation of Zhejiang Province(No.2014ZQ005)the Medicine and Health Research Foundation of Zhejiang Province(No.2015ZDA002),China
文摘Marsdeniae tenacissimae extract (MTE) has been used as an adjuvant medicine for cancer therapy for a long time. Although massive studies demonstrated its considerable anti-cancer effect, there is no research on its influence on erythrocytes, which are firstly interacted with MTE in the circulation. To investigate the influence of MTE on erythrocytes, we used a flow cytometer to detect the MTE-treated alternations of morphology, calcium concentration, and reactive oxygen species (ROS) level in erythrocytes. We used hemolysis under different osmotic solutions to evaluate the fragility of erythrocytes. Data showed that MTE treatment dose-dependently increased the ratio of erythrocyte fragmentation (P〈0.001) and shrinking, and elevated the forward scatter (FSC) value (P〈0.001) and calcium accumulation (P〈0.001). MTE induced ROS production of erythrocytes under the high glucose condition (P〈0.01) and consequently caused a rise in fragility (P〈0.05). These results suggest that MTE induces cytotoxicity and aging in erythrocytes in a dose-dependent manner, and presents the possibility of impairment on cancer patients' circulating erythrocytes when MTE is used as an anti-cancer adjuvant medicine.