目的分析非活动性乙型肝炎病毒表面抗原(hepatitis B virus surface antigen,HBsAg)妇女妊娠期及产后乙型肝炎病毒(hepatitis B virus,HBV)再激活的临床特征及危险因素分析。方法回顾性选取非活动性HBV携带孕妇116例为研究对象。分析妊...目的分析非活动性乙型肝炎病毒表面抗原(hepatitis B virus surface antigen,HBsAg)妇女妊娠期及产后乙型肝炎病毒(hepatitis B virus,HBV)再激活的临床特征及危险因素分析。方法回顾性选取非活动性HBV携带孕妇116例为研究对象。分析妊娠期HBV再激活组与妊娠期HBV未再激活组的基线资料,构建基线资料的临床预测模型并评估模型科学性;分析妊娠期HBV再激活、产后HBV再激活及妊娠期+产后HBV再激活孕妇在HBV激活时的肝功能、免疫功能、肝纤维化指标及炎症因子水平;评估妊娠期HBV再激活影响因素对全因性产后HBV再激活的影响。结果妊娠期HBV再激活组基线HBV脱氧核糖核酸(deoxyribonucleic acid,DNA)、总胆固醇(total cholesterol,TC)、低密度脂蛋白(low density lipoprotein,LDL)水平、初产妇比例明显高于HBV未再激活组,年龄、家庭月收入水平明显低于HBV未再激活组(χ^(2)/t=7.004,5.934,4.805,3.853,10.561,7.289,P<0.05)。基线HBV DNA水平、年龄、家庭月收入对妊娠期HBV再激活具有一定的预测价值(c指数=0.653,AUC 5个月内=0.679,AUC 10个月内=0.742,P<0.05)。仅发生妊娠期HBV再激活组HBV DNA水平、血清透明质酸、层黏连蛋白、三型前胶原N端肽、四型胶原蛋白、C反应蛋白、白细胞介素6、肿瘤坏死因子α低于仅发生产后HBV再激活组、妊娠期+产后HBV再激活组,CD4^(+)、CD4^(+)/CD8^(+)水平明显高于仅发生产后HBV再激活组、妊娠期+产后HBV再激活组(F=5.123、4.835、5.035、17.329、14.924、16.392、14.320、7.852、14.824、6.392,P<0.05)。年龄较低孕妇容易发生全因性产后HBV再激活(P<0.05)。结论年龄低、基线HBV DNA水平高及家庭月收入低的患者容易发生妊娠期HBV再激活,产后HBV再激活所引起的免疫损伤可能较妊娠期更为严重,年龄低者容易发生全因性产后HBV再激活。展开更多
AIM: To examine the effects of tetrandrine (Tet) on the aggregation and ATP-release of rat washed platelets induced by several platelet activators. METHODS: Gel-filtration (Sepharose 2B) was used to isolate washed pla...AIM: To examine the effects of tetrandrine (Tet) on the aggregation and ATP-release of rat washed platelets induced by several platelet activators. METHODS: Gel-filtration (Sepharose 2B) was used to isolate washed platelets from adult rats and the platelet aggragation and ATP-release were measured simultaneously. RESULTS: In the presence of Ca2 + 1 mmol · L-1, Tet 300 μmol·L -1 inhibited the aggregation induced by ADP ( 25 μmol · L -1), collagen (2.5 g·L-1), and thrombin (103 unit·L-1) by 62 %, 60 %, and 34 %, respectively. It also inhibited arachidonic acid (1 mmol · L-1)-induced aggregation. Elevating intracellular Ca2 + concentration with the Ca2 + ionophore, calcimycin (30 μmol · L-1), or by blocking the intracellular calcium pump with cyclopiazonic acid (5 μmol · L-1) initiated platelet aggregation, which was also inhibited by Tet. In Ca2+ -free medium, Tet still elicited an inhibitory effect on aggregation induced by ristocetin (2.5 g·L-1). Lower concentrations of Tet (30 nmol·L-1展开更多
基金Supported by grants from the CRCG of the University of Hong KongHong Kong Research Grant Council.
文摘AIM: To examine the effects of tetrandrine (Tet) on the aggregation and ATP-release of rat washed platelets induced by several platelet activators. METHODS: Gel-filtration (Sepharose 2B) was used to isolate washed platelets from adult rats and the platelet aggragation and ATP-release were measured simultaneously. RESULTS: In the presence of Ca2 + 1 mmol · L-1, Tet 300 μmol·L -1 inhibited the aggregation induced by ADP ( 25 μmol · L -1), collagen (2.5 g·L-1), and thrombin (103 unit·L-1) by 62 %, 60 %, and 34 %, respectively. It also inhibited arachidonic acid (1 mmol · L-1)-induced aggregation. Elevating intracellular Ca2 + concentration with the Ca2 + ionophore, calcimycin (30 μmol · L-1), or by blocking the intracellular calcium pump with cyclopiazonic acid (5 μmol · L-1) initiated platelet aggregation, which was also inhibited by Tet. In Ca2+ -free medium, Tet still elicited an inhibitory effect on aggregation induced by ristocetin (2.5 g·L-1). Lower concentrations of Tet (30 nmol·L-1
