Effects of mild physical exercise on serum lipoproteins and metabolites of arachidonic acid: a controlled randomised trial in middle aged men

To study the effects of physical exercise on biochemical risk factors for ischaemic heart disease 31 healthy middle aged men undertook regular physical exercise for two months and 29 served as controls in a randomised trial. In the men taking regular exercise serum cholesterol concentrations increased 26% more in the high density lipoprotein subfraction two (HDL2) and decreased 31% more in the subfraction three (HDL3) and 9% more in the low density lipoprotein fraction than in the control group. A tendency towards increased plasma 6-keto-prostaglandin F1 alpha concentration and decreased serum thromboxane B2 concentration was found during the period of regular exercise, but prostaglandin E2 concentrations remained unchanged. The increase in plasma 6-keto-prostaglandin F1 alpha concentration was associated with an increase in serum HDL2 cholesterol concentration in the group taking regular exercise. Our data suggest that mild regular physical exercise favourably influences cholesterol distribution in serum lipoproteins in healthy middle aged men and may have beneficial effects on circulating metabolites of arachidonic acid.     

Prostacyclin and thromboxane in diabetes

Concentrations of the stable antiaggregatory prostacyclin metabolite 6-keto-prostaglandin F1 alpha (6-keto-PGF1 alpha) and of the proaggregatory thromboxane A2 metabolite thromboxane B2 were measured by radioimmunoassay in plasma from 53 diabetics. In 33 of these patients the ability of platelets to produce thromboxane B2 during spontaneous clotting was also studied. Plasma 6-keto-PGF1 alpha concentrations were higher (p less than 0.05) in the diabetics (mean 107.7 +/- SE 7.6 ng/l) than in non-diabetic controls matched for age and sex (87.5 +/- 4.7 ng/l), and diabetics with microangiography (n = 28) and higher (p less than 0.01) concentrations (124.3 +/- 10.8 ng/l) than those without microangiography (n = 25; 89.2 +/- 9.3 ng/l). Plasma thromboxane B2 concentrations were also higher (p less than 0.01) in the diabetics (mean 218.5 +/- SE 25.3 ng/l) than in the controls (127.7 +/- 9.8 ng/l), but this increase was not related to microangiography. The ability of platelets to generate thromboxane B2 did not differ between the diabetics (181.4 +/- 16.4 microgram/l) and controls (195.8 +/- 11.8 microgram/l). Platelets of diabetics with microangiopathy or taking oral hypoglycaemic agents (n = 19), however, produced decreased amounts of thromboxane B2 during clotting. Plasma concentrations of 6-keto-PGF1 alpha and thromboxane B2 were not related to concentrations of glucose, haemoglobin A1, high-density lipoprotein cholesterol, cholesterol, triglycerides, magnesium, or creatinine. These results suggest that in diabetics with microangiopathy a balance between prostacyclin and thromboxane A2 is shifted to dominance by prostacyclin.     

Effects of Replenishing Qi, Promoting Blood Circulation and Resolving Phlegm on Vascular Endothelial Function and Blood Coagulation System in Senile Patients with Hyperlipemia

Objective： To observe the curative effect of the method of replenishing qi, promoting blood circulation and resolving phlegm on senile hyperlipemia and its effects on vascular endothelial function and blood coagulation system. Method： 96 patients with senile hyperlipemia were randomly divided into a treatment group and a control group. 56 patients in the treatment group orally took Danshen Jueming Granules （丹参决明颗粒） while 40 patients in the control group orally took Xuezhikang Capsules （血脂康胶囊）. Observed were indexes of blood lipid, vascular endothelial function, blood coagulation system and safety. Results： After treatment, the treatment group was obviously superior to the control group （P〈0.05） in reducing plasma total cholesterol （TC） and low density lipoprotein cholesterol （LDL-C） as well as in the ratio of thromboxane B2 （TXBz） to 6-keto-prostaglandin Flα （6-keto-PGF1α）, D-dimer （D-D） and fibrinogen （FIB）. Conclusion： Danshen Jueming Granules have the effect of regulating metabolism of blood lipid, and improving vascular endothelial function and blood coagulation system in senile patients with hyperlipemia.     

Relation of coronary heart disease based on traditional Chinese medicine syndrome differentiation and prostaglandin, blood platelet function, and protein C]

The relationship between 68 cases of thromboxane B2(TXB2), 6-keto-prostaglandin F1 alpha (6-K-PGF1 alpha), beta-thromboglobulin (beta TG), platelet factor 4 (PF4), protein C antigen (PC:Ag), total-proteins (T-Ps) with coronary heart disease (CHD) based on TCM syndrome differentiation were studied. 45 cases of male, 23 cases of female, they were divided into 30 cases of blood stasis group and 38 cases of Qi syndrome group. 39 healthy subjects of same age and sex were chosen as the control group. The results were as follows: The TXB2, beta TG, PF4 in CHD were higher than those of control. 6-K-PGF1 alpha was lower (P less than 0.05, P less than 0.01) respectively. The TXB2 in blood stasis was significantly higher than that of Qi syndrome while the 6-K-PGF1 alpha in Qi Syndrome was significantly lower than that of blood stasis syndrome (P less than 0.01). The PC:Ag, T-Ps in CHD were higher than those of the control. The PC:Ag in blood stasis was lower and was higher in Qi syndrome (P less than 0.01). It showed that microthrombosis formed in blood stasis group caused blood flow slowly, while coronary-pathy and/or coronary spasm were the major pathologic change in Qi syndrome. Elevated PC:Ag, T-Ps in Qi syndrome showed that there were complementary action to hypercoagulation in Qi syndrome to eliminate coagulation factor to prevent coagulation happening and stimulation of fibrinolysin activator, promoting fibrinogenolysis.(ABSTRACT TRUNCATED AT 250 WORDS)     

Effects of Ligusticum wallichii on the plasma levels of beta-thromboglobulin, platelet factor 4, thromboxane B2 and 6-keto-PGF1 alpha in rabbits under acute experimental cerebral ischemia

By occluding the bilateral carotid arteries of rabbits to produce bilateral partial cerebral ischemia, and by using RIA and ELISA to measure the levels of Beta-thromboglobulin (beta-TG), platelet factor 4 (PF4), thromboxane B2 (TXB2) and 6-keto-prostaglandin F1 alpha (6-keto-PGF1 alpha) in plasma, the authors found that the levels of beta-TG, PF4 and TXB2 in plasma had significantly increased (P less than 0.01), but the level of 6-keto-PGF1 alpha in plasma showed no change (P greater than 0.05) after cerebral ischemia appeared. The results of the Ligusticum wallichii (Ligusticum) pre-treatment to the test-group showed that the levels of beta-TG, PF4 and TXB2 in plasma had significantly decreased (P less than 0.01), and the level of 6-keto-PGF1 alpha in plasma had significantly increased (P less than 0.05). This suggested that the Ligusticum treatment could effectively inhibit the platelet activation in vivo and correct the TXA2-PGI2 imbalance in blood after cerebral ischemia. In this study, some new approaches were explored to explain the mechanisms of Ligusticum for preventing and treating cerebral ischemia.     

中老年高脂血症患者血小板磷脂膜脂肪酸与血栓危害因子相关性研究

目的研究杭州地区中老年高脂血症患者血栓危害因子与血小板磷脂膜脂肪酸的相关性。方法对高脂血症组（81例）和正常血脂对照组（65例）,用气相色谱仪分析各种甲酯化血小板磷脂膜脂肪酸的含量,用标准方法测定血液中血栓危害因子血清同型半胱氨酸（Hey）及血栓素B2（TXB2）,并用多元线性回归分析二者之间的相关性。结果高脂血症患者的血小板磷脂膜脂肪酸与健康对照组间差异无统计学意义（P〉0．05）。Hey与血小板磷脂膜廿二碳六烯酸（DHA）、n-3多不饱和脂肪酸与n-6多不饱和脂肪酸比值（n-3PUFA／n-6PUFA）呈明显负相关（r=-0．277、-0．231,均P〈0．01）。TXB2与花生四烯酸呈正相关（r=0．176,P〈0．05）,与DHA、廿碳五烯酸（EPA）和n-3PUFA／n-6PUFA呈明显负相关（r=-0．209、-0．194、-0．238,P〈0．01、0．05、0．01）。结论提高血小板磷脂膜n-3PUFA／n-6PUFA值有利于降低与血栓形成密切相关的危险因子Hey和TXB2的生成,为选择饮食提供依据。     

TXB2、HCY和6-K-PGF1a对评估急性脑梗死疗效的价值

目的探讨血浆血栓素B2(TXB2)、同型半胱氨酸(HCY)和6-酮-前列腺素F1a(6-K-PGF1a)测定对急性脑梗死患者疗效观察的临床意义。方法对108例急性脑梗死患者治疗前和治疗后2周,采用放射免疫法测定血浆血栓素B2(TXB2)、6-酮-前列腺素F1a(6-K-PGF1a)浓度,采用微粒子酶免分析法测定治疗前后同型半胱氨酸(HCY)浓度,观察治疗前后患者血浆TXB2、6-K-PGF1a、HCY的浓度改变。结果急性脑梗死患者治疗后血浆TXB2及HCY明显下降(P0.05),6-K-PGF1a明显升高(P0.05)。结论通过测定血浆TXB2、6-K-PGF1a、HCY浓度,可以判断急性脑梗死的疗效,对治疗急性脑梗死有一定价值。     

养阴生津方对热盛津伤瘀滞证模型家兔血液流变性和凝血因子的影响

目的:研究养阴生津方对热盛津伤瘀滞证模型家兔血液流变性和凝血因子的影响.方法:采用药物造模方法,复制温病热盛津伤瘀滞证家兔模型,观察养阴生津方对模型家兔血液黏度、血沉、红细胞压积、血小板聚集率、凝血酶原时间(prothrombin time,PT)、凝血酶时间(thrombin time,TT)、部分凝血活酶时间(kaolin partial thromboplastin time,KPTT)、纤维蛋白原(fibrinogen,Fg)、血栓素B2(thromboxane B2,TXB2)和6-酮-前列腺素F1α(6-keto-prostaglandin F1α,6-keto-PGF1α)的影响.结果:养阴生津方能降低血液黏度和红细胞压积,抑制血小板聚集,降低Fg含量,对抗PT、TT、KPTT缩短,协调TXB2、6-keto-PGF1α间平衡.结论:养阴生津方能改善血液流变性,调节凝血功能,抑制血栓形成,是温病"滋而能通"治法的药理学基础之一.     

脂微球携载前列腺素E1对闭塞性动脉硬化症患者血管内皮功能的影响

目的 研究脂微球携载前列腺素E1（Lipo-PGE1）对闭塞性动脉硬化症（ASO）患者血管内皮功能的影响。方法 将65例ASO患者随机分为两组,Lipo-PGE1治疗组38例在常规治疗基础上加用Lipo-PGE（110μg／d）,静脉滴注,共2个疗程,常规治疗组27例仅接受常规治疗。观察沧疗前和治疗2个月后血清内皮素（ET）、一氧化氮（NO）、血管性假血友病因子（Von Willebrand factor,vWF）、6酮前列腺素F1α（6．K．PGF1α）水平的变化。结果 ①常规治疗组治疗后ET显著降低（P〈0．01）,NO显著升高（P〈0．01）,vWF有下降趋势,6．K．PGF1α有升高趋势,但均未达统计学意义;②Lipo-PGE1治疗组治疗后ET、vWF水平显著降低（P〈0．01）,NO、6-K-PGF1α水平显著升高（P〈0．01）;③治疗后Lipo-PGE1治疗组NO、6．K．PGF1α水平高于常规治疗组（P〈0．01）,ET、vWF水平低于常规治疗组（P〈0．01）。结论 Lipo-PGE1可能通过降低血清ET、vWF,提高NO、6-K-PGF1α水平等途径改善闭塞性动脉硬化症患者血管内皮功能,提高临床疗效。     

高蛋白饮食及大量蛋白尿对慢性肾功能衰竭大鼠的加重损害作用

目的:观察高蛋白饮食及大量蛋白尿对慢性肾功能衰竭(chronic renal failure,CRF)大鼠的加重损害作用。方法:通过先用5/6肾切除大鼠法制作CRF动物模型,成功后再分别给予5/6肾切除大鼠不同蛋白饮食喂养2个月,制作有大量蛋白尿的CRF动物模型。生化检测不同蛋白饮食喂养的5/6肾切除大鼠血尿素氮(blood urea nitrogen,BUN)、血清肌酐(serumcreatinine,Scr)和24 h尿蛋白定量;放免检测血内皮素-1(endothelin-1,ET-1)、血栓素B2(thromboxane B2,TXB2)、6-酮-前列腺素Flα(6 ketone prostaglandin Flα,6-Keto-PGFlα);分光光度计比色法检测血和肾组织超氧化物歧化酶(superoxide dismutase,SOD)、丙二醛(malondialdehyde,MDA)、谷胱甘肽过氧化物酶(glutathione peroxidase,GSH-Px)水平。结果:高蛋白饮食及大量蛋白尿可通过加重CRF大鼠的血液动力学异常,升高TXB2和ET-1,降低血6-keto-PGFlα;减弱大鼠血SOD和GSH-Px的活性,加速肾损害。结论:高蛋白饮食可通过导致5/6肾切除大鼠大量蛋白尿,影响肾脏血管活性物质表达,降低5/6肾切除大鼠抗氧化能力而加速CRF的进展。     

剖宫产术中麻黄碱与去氧肾上腺素对产妇和胎儿影响的比较

目的 比较同等效价的麻黄碱与去氧肾上腺素用于脊麻剖宫产术中维持产妇血压接近基础值时对产妇和胎儿的影响.方法 选择2010年1至6月在南京医科大学附属无锡妇幼保健院待产的单胎足月妊娠产妇90例,拟择期于脊麻下行剖宫产手术,按随机数字表分成3组(E、E+Ph、Ph组),每组30例.E组泵注麻黄碱(麻黄碱4g/L);E+Ph组泵注麻黄碱复合去氧肾上腺素(麻黄碱2g/L+去氧肾上腺素25 mg/L);Ph组泵注去氧肾上腺素(去氧肾上腺素50 mg/L).麻醉中通过调整药物输注速度维持血压接近术前基础值.监测用药后1、3、5及10 min,切皮时,子宫切开时产妇血压和心率及胎心率.胎儿娩出后即刻分别取产妇动脉、胎儿脐动脉以及脐静脉的血标本,行血气分析、检测乳酸和血糖的浓度.结果 E、E+Ph组用药后胎心率比术前基础值明显增快[给药5 min时:(150±10)次/min比(142±13)次/min、(146±10)次/min比(142±9)次/min,均P＜0.05],Ph组无明显变化[给药5 min时:(143±9)次/min比(143±6)次/min,P＞0.05];E、E+Ph组的胎儿心动过速发生率高于Ph组(P＜0.05).E组脐动脉和脐静脉血的pH值和碱剩余分别低于E+Ph、Ph组[脐动脉为7.20±0.10比7.27±0.05、7.28±0.03,(-3.1±3.1)mmol/L比(-0.9±1.7)mmol/L、(-0.3±1.7)mmol/L,脐静脉为7.29±0.09比7.34±0.03、7.34±0.03,(-3.3±2.9)mmol/L比(-2.0±1.7)mmol/L、(-0.9±1.5)mmol/L,均P＜0.05],E组脐动脉和脐静脉血的PCO2、乳酸和血糖浓度均分别高于Ph组(均P＜0.05);E+Ph组脐动脉和脐静脉血的乳酸和血糖浓度均分别高于Ph组(均P＜0.05)而碱剩余低于Ph组(P＜0.05).结论 相比麻黄碱而言,去氧肾上腺素除可快速有效地纠正产妇低血压外,不会引起胎儿的代谢兴奋,对内稳态影响小,更适合用于防治产科麻醉中的低血压.

Abstract：

Objective To compare the different effects in fetus and puerpera with an equivalent dose of ephedrine (E) and phenylephrine ( Ph ) for maintaining maternal blood pressure near baseline during spinal anesthesia for a cesarean delivery. Methods Ninety mature parturient women with single-embryo scheduled for an elective cesarean delivery under spinal anesthesia at our hospital during January - June 2010 were randomly divided into 3 groups (E, E + Ph and Ph, n =30 each). Group E received an infusion of ephedrine (ephedrine 4 g/L), Group E + Ph ephedrine plus phenylephrine (ephedrine 2 g/L + phenylephrine 25 mg/L) and Group Ph phenylephrine (phenylephrine 50 mg/L). The blood pressure was maintained near baseline by adjusting the infusion rate during anesthesia. The maternal blood pressure, heart rate and fetal heart rate were measured at the time points of 1, 3, 5 and 10 min, skin incision and uterine incision after injecting anesthetic into subarachnoid space. Immediately after delivery, maternal arterial, umbilical arterial and umbilical venous blood samples were withdrawn for the measurements of blood gases and plasma concentrations of lactate and glucose. Results The fetal heart rate of groups E and E + Ph significantly increased after infusion[5 min: ( 150 ± 10) times/min vs( 142 ± 13) times/min, ( 146 ± 10)times/min vs( 142 ± 9 ) times/min, both P ＜ 0. 05]while those of group Ph had no significant changes [5 min: ( 143 ± 9 ) times/min vs ( 143 ± 6 ) times/min, P ＞ 0. 05]. The incidence of fetal tachycardia in groups E and E + Ph was greater than that in group Ph. In group E, umbilical arterial and umbilical venous pH and base excess were lower than those in groups E + Ph and Ph [umbilical arterial: 7. 20 ± 0. 10 vs 7.27 ± 0. 05,7. 28 ± 0. 03, ( - 3. 1 ± 3. 1 ) mmol/L vs ( - 0. 9 ± 1.7 ) mmol/L、 ( - 0. 3 ± 1.7 ) mmol/L,umbilical venous:7.29 ±0. 09 vs 7. 34 ± 0. 03,7.34 ± 0. 03, ( - 3.3 ± 2. 9 ) mmol/L vs ( - 2. 0 ± 1.7 )mmol/L,(-0.9 ±1.5) mmol/L, all P ＜ 0.05]. Umbilical arterial PCO2 and plasma concentrations of lactate and glucose in group E were greater than those in group Ph ( all P ＜ 0. 05 ). Umbilical arterial and umbilical venous plasma concentrations of lactate and glucose were greater in group E + Ph than those in group Ph( all P ＜ 0. 05 ). But base excess was lower( P ＜ 0. 05 ). Conclusion Phenylephrine may be more ideal for treating the hypotension of spinal anesthesia for a cesarean delivery. It corrects hypotension following spinal anesthesia, improves fetal oxygen supply and demand balance but induces no metabolic excitation in fetus as compared with ephedrine.     

Effects of Medicinal Cake-Separated Moxibustion on Plasma 6-Keto-PGF1α and TXB2 Contents in the Rabbit of Hyperlipemia

Hyperlipemia rabbit models established with high cholesterol and fat diet were treated vith directmoxibustion and medicinal cake-separated moxibustion. The post-treatment plasma 6-keto-prostaglandin F_(1α)(6-keto-PGF_(1α)) and thromboxane B2 (TXB_2) contents were determined by radioimmunoassay. Resultsindicated that the plasma 6-keto-PGF_(1α) content significantly increased,the TXB_2 level decreased (P<0.05)and the TXB_2 /6-keto-PGF_(1α) ratio also decreased (P<0.01) in the medicinal cake-separated moxibustiongroup as compared with those in the model group respectively,but there was no significant differencebetween the medicinal cake-separated moxibustion group and the direct moxibustion group (P>0.05),suggesting that both the medicinal cake-separated moxibustion and direct moxibustion can regulate theplasma 6-keto-PGF_(1α) and TXB_2 contents,and the TXB_2/6-keto-PGF_(1α) ratio with similar actions,and have acertain protective action on endothelial cells of the aorta in the rabbit of hyperlipemia     

37例子痫临床诊治分析

探讨子痫的预防、治疗、终止妊娠的时机及分娩方式,提高子痫的防治水平,降低孕产妇和围生儿的死亡率。方法对37例子痫患者均采用硫酸镁,甘露醇,安定、吗啡或冬眠合剂,血压控制不理想者加用酚妥拉明或柳胺苄心啶降压治疗。比较子痫患者终止妊娠的时机及分娩方式对母婴的影响。结果 22例产前子痫患者终止妊娠时间<2、≥6h时围生儿1min Apgar评分为0～3分所占比例均明显高于≥2～<6h(均P<0.05),终止妊娠时间<2h时围生儿1min Apgar评分为4～7分所占比例均明显高于≥2～<6、≥6h(均P<0.05),终止妊娠时间<2、≥6h时围生儿1min Apgar评分为8～10分所占比例均明显低于≥2～<6h(均P<0.05);终止妊娠时间<2、≥2～<6、≥6h时围生儿死亡率比较差异均无统计学意义(均P>0.05)。产后子痫患者阴道分娩时围生儿1min Apgar评分为0～3分所占比例明显高于剖宫产术(P<0.05),子痫患者阴道分娩时围生儿1min Apgar评分为4～7分所占比例与剖宫产术比较差异无统计学意义(P>0.05),子痫患者阴道分娩时围生儿1min Apgar评分为8～10分所占比例明显低于剖宫产术(P<0.05)。有产前检查7例,无产前检查30例。有并发症25例次。结论产前及产时子痫中抽搐控制后2～6h行剖宫产术终止妊娠,则新生儿发生窒息率低。做好产前监测,尽早发现妊娠期高血压疾病并积极、正确的处理及子痫抽搐控制后及时终止妊娠可改善子痫患者母婴的预后。     

高压氧对快速减压应激损伤动物脑组织PGs的作用研究

目的：探讨高压氧(hyperbaric oxygen,HBO)对快速减压动物脑组织前列腺素的影响。方法：将豚鼠分为快速减压组、高压氧组和对照组。快速减压组动物置于小加压舱内，5min加压至0．6MPa，并在该压力下暴露60min,用19min减压至常压，出舱，形成减压应激损伤；高压氧组：同快速减压组形成减压应激损伤，再在0．25MPa氧压下暴露60min；对照组：不进行加、减压和吸氧处理。用酶免测定法测定脑组织中PGs含量。结果：高压氧暴露后脑组织中的PGE2、TXB2和6—K—PGF1n含量明显降低，其中PGE2降为快速减压组的2％，TXB2降为快速减压组的35％，6—K—PGF1n降为快速减压组的22％。结论：高压氧能使快速减压动物脑组织中PGs含量明显降低。     

肝炎后肝硬化患者尿血栓素B_2和6-酮-前列腺素F_(1α)与肾功能的关系

用放射免疫法测定了45例肝炎后肝硬化患者尿血栓素B_2和6-酮-前列腺素F_(1α)的排泄率。结果,肝硬化患者尿血栓素B_2排泄率较正常对照明显升高;肝硬化无并肾衰者尿6-酮-PGF_(1α)较对照组升高;但并有肾衰者尿6-酮-前列腺素F_(1α)排泄率比无并肾衰者则显著降低(P<0.01),尿TXB_2/6-酮-PGF_(1α)比值明显上升(P<0.001)。肝硬化患者尿6-酮-PGF_(1α)与血肌酐呈负相关关系,与肌酐清除率呈正相关关系。提示肾脏前列环素对维持肝硬化病人的肾功能是很重要的;肾脏TXA_2和PGI_2的平衡失调在肝肾综合征发病中可能具有重要意义。     

Anti-angina effect of puerarin and its effect on plasma thromboxane A2 and prostacyclin

Plasma concentrations of thromboxane B2 (TXB2) and 6-keto-prostaglandin Fl alpha(6-K-PGFl alpha), the stable nonenzymatic metabolites of TXA2 and prostacyclin were assayed in 30 patients suffering from angina pectoris before and after administration of puerarin. In addition, serum lipids and HDL were also measured at the same time. 20 healthy subjects were chosen as the control group. Two weeks before and during administration of puerarin, aspirin, calcium-antagonists, all kinds of hypotensors and drugs relieving chest pain of angina pectoris were strictly prohibited. Puerarin was intravenously given, 500 mg daily for 7 days, which was considered as a therapeutic course. Besides relieving of chest pain, decreasing of heart rate and reduction of blood pressure clinically, it was also found that plasma 6-K-PGFl alpha concentrations were significantly elevated from 38.32 +/- 15.40 to 158. 79 +/- 98.62 pg (P less than 0.01) after administration of puerarin, but there was no significantly difference between plasma TXB2 concentrations before and after administering the drug. In addition, serum HDL was apparently enhanced as compared with that before the administration of puerarin (P less than 0.01). The results indicated that puerarin has the function of anti-angina, reducing both systolic and diastolic blood pressure and diminishing myocardial oxygen consumption.     

Human vascular smooth muscle cells and endothelial cells cocultured on polyglycolic acid (70/30) scaffold in tissue engineered vascular graft

Background Current prosthetic, small diameter vascular grafts showing poor long term patency rates have led to the pursuit of other biological materials. Biomaterials that successfully integrate into surrounding tissue should match not only the mechanical properties of tissues, but also topography. Polyglycolic acid (70/30) has been used as synthetic grafts to determine whether human vascular smooth muscle cells and endothelial cells attach, survive and secrete endothelin and 6-keto-prostaglandin F1α (6-keto-PGF1α).Methods Endothelial cells and smooth muscle cells were isolated from adult human great saphenous vein. They were seeded on polyglycolic acid scaffold in vitro separately to grow vascular patch (Groups A and B respectively) and cocultured in vitro to grow into vascular patch (Group C). Smooth muscle cells and endothelial cells were identified by immunohistochemical analysis and growth of cells on polyglycolic acid was investigated using scanning electron microscopy. The levels of endothelin and 6-keto-PGF1α in the culturing solutions were examined by radioimmunology to measure endothelial function. Results Seed smooth muscle cells adhered to polyglycolic acid scaffold and over 28 days grew in the interstices to form a uniform cell distribution throughout the scaffold. Then seed endothelial cells formed a complete endothelial layer on the smooth muscle cells. The levels of endothelin and 6-keto-prostaglandin F1 alpha in the culturing solution were (234±29) pg/ml and (428±98) pg/ml respectively in Group C and (196±30) pg/ml and (346±120) pg/ml in Group B; both significantly higher than in Groups A and D (blank control group, all P&lt;0.05 ). Conclusions Cells could be grown successfully on polyglycolic acid and retain functions of secretion. Our next step is to use human saphenous vein smooth muscle cells and endothelial cells to grow tubular vascular grafts in vitro.     

肾毒宁冲剂对慢性肾衰竭患者血管活性物质的影响

目的：观察肾毒宁冲剂对慢性肾衰竭（CKD）患者肾功能及血管活性物质的影响。方法：将100例慢性肾衰竭患者随机分为尿毒清组和肾毒宁组,两组均常规予降压、抗感染、纠正酸中毒和电解质紊乱等对症治疗,并分别用尿毒清冲剂和肾毒宁冲剂治疗2个月,观察两组治疗前后临床症状、肾功能、血常规2、4h尿蛋白定量及血管活性物质的改变。结果：两组患者治疗后临床症状、肾功能、血常规均显著改善,与治疗前比较差异有统计学意义（P〈0.01,P〈0.05）。治疗后肾毒宁组血浆血管紧张素Ⅰ、Ⅱ（AT-Ⅰ、AT-Ⅱ）、内皮素（ET）、6-酮前列环素F1α（6-Keto-PGF1α）、TXB2（血栓素B2）/6-Keto-PGF1α改善更佳（P〈0.01）。肾毒宁冲剂在降低ET、升高一氧化氮合成酶（NOS）方面优于尿毒清组（P〈0.05）。结论：肾毒宁冲剂通过对慢性肾衰竭患者血管活性物质的改善而显著改善肾功能。     

急性肾小管损伤肾组织前列酸类的变化及意义

目的探讨前列酸类(PGs)在表皮生长因子(EGF)促进急性肾小管坏死(ATN)肾小管修复过程中的作用,研究外源性EGF对大鼠庆大霉素(GM)中毒性ATN肾组织PGs变化的作用及其与肾小管上皮细胞DNA合成的关系.方法Wis-tar大鼠分为3组:正常对照组(NL组,n＝7);GM组(G组,n＝20):予以GM200mg/kg×3 d;GM+EGF组(G+E组,n＝19):GM 200mg/kg×3 d+EGF20μg.分别在注射后第1、4、8、12、15天测定肾小管上皮细胞的3氚-胸腺核苷掺入率(3HTdR)、血清肌酐(Scr)、肾组织前列腺素2(PGE2)、前列腺素6酮(6-keto PGF1α)、前列环素(TXB2)的含量.结果G+E组动物的3HTdR掺入率均较G组动物明显增加,以在给药后第4天最为显著.G+E组动物的肾脏病理损害较G组有所改善,但Scr水平较G组无差别.G+E组动物肾组织6-keto-PGF1α水平也比G组明显增高,TXB2水平比G组动物降低.G+E组动物肾组织PGE2和6-keto-PGF1α的水平与肾小管上皮细胞的3HTdR掺入率均呈显著正相关.结论(1) ATN时肾组织PGE2、6-keto-PGF1α和TXB2水平发生的动态变化可能与肾小管修复的细胞增殖有一定关系.(2)外源性EGF可能有促进肾组织6-keto-PGF1α释放,抑制TXB2合成的作用,该作用可能与EGF促进ATN肾小管上皮细胞修复有关.     

冠心病患者dTP比值分析及与预后的相关性

目的：分析冠心病患者血清11-脱氢-血栓素B2（11-dh-TXB2）与6-酮-前列腺素F1α（6-k-PGF1α）比值（dTP比值）的变化,评价冠心病患者dTP比值的影响因素及其与冠心病患者预后的关系。方法：203例住院患者应用酶联免疫法测定血浆中11-dh-TXB2和6-k-PGF1α水平,计算dTP比值。测定血液生化指标,记录心血管疾病危险因素、伴随临床疾病、超声心动图、冠状动脉造影结果。记录随访1年时主要不良心血管事件（MACE）。结果：冠心病患者dTP比值高于对照组。dTP比值与hs-CRP、TC水平及冠状动脉严重病变支数相关。临床合并高血压病、糖尿病的患者和介入治疗术后的患者dTP比值较高。患者住院时dTP比值增高与随访1年发生MACE相关。结论：冠心病患者dTP比值升高,不仅能够反映病情的严重性,而且预示患者1年内发生MACE的危险性增加。