The investigation for the relationship among serum leptin, erythrocyte membrane Ca^(2+)-ATPase activity and hypertensive disorder complicating pregnancy

Objective： To study the significance of Leptin and the activity of erythrocyte membrane Ca^2＋-ATPase（EMCA） in the development of hypertensive disorder complicating pregnancy. Methods： Radioimmunoassay was used to test the level of serum Leptin, and the activity of EMCA was determined chemically in 38 pregnant women with hypertensive disorder complicating pregnancy and 36 normotensive pregnant women. Results： The level of serum Leptin in hypertensive disorder complicating pregnancy（gestational hypertension： 13.76 ± 3.46 ng/ml; preeclampsia： 15.76 ± 5.47 ng/ml; eclampsia： 18.32 ± 6.38 ng/ml）was significantly higher than that in normotensive pregnant women （11.33 ± 2.93 ng/ml） ,respectively. The average EMCA activity of patients with hypertensive disorder complicating pregnancy （gestational hypertension： 1.65 ± 0.24 μmol·pi/mg.h ; preeclampsia： 1.37 ± 0.19 μ mol·pi/mg·h;eclampsia：1.12 ± 0.14 μmol·pi/mg·h） was significantly lower than that of normotensive pregnant women（1.83 ± 0.38 μ mol·pi/mg·h）,respectively. There was a negative correlation between the level of serum Leptin and the activity of RMCA in hypertensive disorder complicating pregnancy （r = -0.63）. Conclusion： Inhibition of EMCA activity of erythrocyte in hypertensive disorder complicating pregnancy may increase cytoplasmic free calcium, which contributes to the development of hypertensive disorder complicating pregnancy. The negative correlation between the level of serum Leptin and the activity of EMCA, also suggested that serum Leptin and the activity of EMCA may play a role in the development of hypertensive disorder complicating pregnancy.

Effect of Huoxuequyu Recipe on Erythrocyte Membrane Ca^(2+)-ATPase Activity in Pregnant Rats with Asymmetrical Intrauterine Growth Retardation Induced by Passive Smoking

The effect of Huoxuequyu recipe on erythrocyte membrane Ca2+-ATPase activity in pregnant rats with passive smoking induced asymmetrical intrauterine growth retardation(IUGR)was observed.The rats were divided into three groups:control group,model group and treated group.The fetal mean birth weight and erythrocyte membrane Ca2+-ATPase activity were found to be decreased in the model group as compared with the control and treated groups.There was a significant difference between the model group and the control group(P<0.01),while no significant difference existed between the treated group and the control group(P>0.05).Furthermore,the findings indicated that the erythrocyte membrane Ca2+-ATPase activity seem to be positively correlated with the birth weight(P<0.05).On the basis of our observation,it is believed that the Huoxuequyu decoction could increase erythrocyte membrane Ca2+-ATPase activity and promote blood circulation, thereby exerting a beneficial effect on fetal development.

Effect of Huoxuequyu Recipe on Erythrocyte Ultrastructure and Membrane ATPase Activity in Rats with Passive Smoking

The effect of 'Huoxuequyu' recipe on erythrocyte membrane Ca2+ATPase activity, Na+-K+-ATPase activity and erythrocyte ultrastructure in rats exposed to passive smoking were observed. The erythrocyte membrane Ca2+-ATPase activity and Na+-K+-ATPase activity were found to be decreased in the model group as compared with the control group (P<0.01, P<0.01), while no significant difference existed between the treated group and the control group (P>0.05). Our results also showed that there were more deformed red blood cells in model group than in control group under TCM and SEM (P<0.0001). No significant difference was found between control group and treated group (P>0.05). Furthermore,these findings indicated that 'Huoxuequyu' recipe , a prepared natural herbal medicine, may be involved in modulation of the activity of erythrocyte membrane enzymes,thereby protecting erythrocyte membrane, so as to improve the erythrocyte function.

妊娠期高血压疾病孕妇瘦素与红细胞膜Ca^(2+)-ATP酶活性的研究

目的:探讨瘦素、红细胞膜Ca2+-ATP酶活性在妊娠期高血压疾病发病中的意义及相互关系。方法:采用放射免疫法测定38例妊娠期高血压疾病患者,36例正常孕妇的血清瘦素。采用生化方法提取红细胞膜,测定红细胞膜Ca2+-ATP酶活性。结果:妊娠期高血压疾病患者血清瘦素水平明显高于对照组(15.95±5.10ng/m l vs 11.33±2.93ng/m l),红细胞膜Ca2+-ATP酶活性明显低于对照组[1.38±0.19μmol.pi/(mg.h)vs 1.83±0.38μmol.pi/(mg.h)](P<0.01)。妊娠期高血压疾病患者血清瘦素与红细胞膜Ca2+-ATP酶活性呈负相关(r=-0.63)。结论:血清瘦素水平与妊娠期高血压疾病的发生有关;妊娠期高血压疾病患者红细胞膜Ca2+-ATP酶活性降低引起细胞内游离Ca2+浓度升高,导致妊娠期高血压疾病发生;妊娠期高血压疾病患者血清瘦素水平与红细胞膜Ca2+-ATP酶活性呈负相关,两者共同参与妊娠期高血压疾病的发病。