高血压患者肾素活性、血管紧张素Ⅱ与心电图关系

目的探讨蒙古族人群高血压患者血浆肾素活性(PRA)和血管紧张素Ⅱ(AngⅡ)与缺血性心电图的关系。方法在蒙古族人群高血压现况调查的基础上,对468例高血压患者进行心电图检查、PRA和AngⅡ的检测;采用SPSS 13.0软件进行统计分析。结果缺血性心电图表现组的PRA 1.37 ng/(mL.h)低于非缺血性心电图表现组1.38 ng/(mL.h),但差异无统计学意义(均P0.05)。缺血性心电图表现组的Ang Ⅱ(51.3 pg/mL)低于非缺血性心电图表现组(53.0 pg/mL),但差异无统计学意义(均P0.05)。经多因素Logistic回归分析,各PRA和AngⅡ水平对缺血性心电图表现的OR值差异均无统计学意义(均P0.05)。结论在高血压患者中,PRA和AngⅡ水平与缺血性心电图表现均无关联。     

蒙古族人群血管紧张素Ⅱ和肾素活性与高血压的危险性

高血压是世界范围内的公共卫生问题.炎症和内皮功能异常是动脉粥样硬化和心血管疾病的新危险因素[1].血管紧张素Ⅱ(AngⅡ)不仅具有收缩血管的作用,也可诱导内皮功能异常和炎症反应[2,3].本研究以内蒙古农牧区蒙古族一般人群为研究对象,探讨AngⅡ和血浆肾素活性(PRA)与高血压危险性的关系.     

蒙古族人群肾素活性和血管紧张素Ⅱ 与平均动脉压的关系

摘要:目的　探讨蒙古族人群血浆肾素活性（PRA）和血管紧张素Ⅱ（AngⅡ）与平均动脉压的（MAP）关系。方法　对2589例蒙古族对象进行人口统计学特征、生活方式等危险因素的调查、身高体重和血压的测量以及PRA和AngⅡ等指标的实验室检测。采用单因素和多因素的分析方法,分析PRA和AngⅡ与MAP的关联关系。结果　蒙古族人群中,PRA与MAP之间呈负相关（r＝-0.125,P＜0.001）。多因素调整后,与最低分位组相比,PRA最高分位组的MAP升高的OR值（95%CI）为0.57（0.42～0.76）。AngⅡ与MAP之间呈正相关（r＝0.119,P＜0.001）。多因素调整后,与最低分位组相比,AngⅡ最高分位组的MAP升高的OR值（95%CI）为2.25（1.71～2.98）。结论　在蒙古族人群中,PRA水平降低和AngⅡ水平增加可增加MAP升高危险。     

抗阻运动对肾素-血管紧张素系统的影响

目的探讨肾素-血管紧张素系统在抗阻运动致运动性肾功能异常中的作用。方法广东省田径队高水平运动员6名以本人最大负荷的95%作为练习强度,最快速完成抓翻、半蹲和支撑起抗阻运动方案,于总运动前、后15min时取肘静脉血和尿液分别进行肾素-血管紧张素系统活性、血乳酸、尿蛋白及其组分的测定,用血乳酸监测运动强度。结果与运动前比较,运动员大强度抗阻运动后15min时血乳酸值升高730.9%,尿总蛋白、尿白蛋白、尿β2-微球蛋白含量分别升高118.4%、1424.1%和253.1%,尿pH值下降14.7%(P<0.05,P<0.01);血浆血管紧张素Ⅰ、血管紧张素Ⅱ活性分别升高108.3%和67.7%(P<0.05,P<0.01);醛固酮含量变化的差异无显著性(P>0.05)。结论大强度抗阻运动可能造成肾小球、肾小管部位的暂时性损伤。肾素-血管紧张素系统在大强度抗阻运动后的应激反应明显。     

血浆肾素、血管紧张素Ⅱ、醛固酮含量在原发性高血压病患者治疗前后的临床意义

目的 探讨血浆肾素、血管紧张素Ⅱ、醛固酮水平在高血压病患者治疗前后的临床意义。方法 选择原发性高血压病人122例，其中轻型20例，中型78例，重型24例，分别于治疗前后用放射免疫方法测定血浆PRA、AngⅡ、ALD含量。结果 高压组血浆PRA、AngⅡ、ALD含量明显高于对照组（P〈0．01）；轻、中、重型三组血浆PRA、AngⅡ、ALD含量呈逐步升高态势，组间相互比较有显著性和非常显著性意义（P〈0．05～0．01）；治疗后血浆PRA、AngⅡ、ALD含量有较明显的降低，与治疗前比较有非常显著性意义（P〈0．01）。结论 降低原发性高血压患者血浆PRA、AngⅡ、ALD含量是治疗高血压病的关键；血浆PRA、AngⅡ、ALD是监测原发性高血压病疗效的可靠而且灵敏的指标。     

后肢接振对家兔脑组织血管内皮活性物质及ATP酶活力的影响

目的探讨振动对脑组织血管内皮活性物质及ATP酶活力的影响,及其与振动性神经损伤的关系。方法将24只新西兰家兔随机分为低接振强度、中接振强度、高接振强度和对照组,测定各组脑组织中血管内皮活性物质及ATP酶活力。结果随接振剂量的增大,舒张血管物质一氧化氮(NO)、一氧化氮合酶(NOS)有降低趋势,缩血管物质内皮素(ET)有升高趋势,Na -K -ATP酶和Ca2 - Mg2 -ATP酶活力有降低趋势;高强度、中强度组各指标与对照组的差异均有统计学意义(P<0．05,P< 0．01)。结论局部振动可使脑组织血管内皮活性物质及ATP酶活力发生改变,此变化与振动性神经损伤有一定关系。     

慢性肾功能衰竭患者血浆心钠素和肾素、血管紧张素Ⅱ、醛固酮变化的观察及临床意义的探讨

本文用RIA法测定30例健康人、CRF24例非透析病人和14例血透病人的血浆ANP、PRA、ATⅡ、ALD水平。结果表明CRF病人ANP、PRA、ATⅡ、ALD明显高于对照胆（P<0.05～0.01）,其中高血压组ANP明显高于非高血压组（P<0.05）,血透后ANP明显下降（P<0.01）。ANP和Scr、MAP呈正相关,ANP、ATⅡ均和A呈负相关。结合文献初步探讨了CRF时,ANP和PAS的临床意义。     

寒冷气候对正常妊娠及子痫前期孕妇循环肾素和血管紧张素Ⅱ的影响及意义

目的:探讨寒冷季节正常妊娠和子痫前期孕妇循环肾素(PRA)和血管紧张素Ⅱ(AngⅡ)的水平的变化.方法:采用放射免疫分析方法检测孕妇血浆PRA和AngⅡ的水平.结果:与同季节型正常妊娠相比,冬季及过渡季型子痫前期组血浆PRA水平降低,过渡季型子痫前期组血浆AngⅡ水平降低,冬季型子痫前期组血浆AngⅡ水平升高(P均＜0.05);与过渡季型正常妊娠相比,冬季型正常妊娠AngⅡ水平升高(P＜0.05);与过渡季型子痫前期组相比,冬季型子痫前期组血浆AngⅡ水平升高(P＜0.01);各组血浆PRA水平均无统计学差异(P＞0.05).结论:寒冷刺激时,子痫前期患者循环肾素-血管紧张素系统(RAS)显著激活,血浆AngⅡ升高,导致血管收缩增强,血管痉挛、组织缺血,可能是寒冷季节子痫前期发病率增高的原因之一.     

烧伤、骨折对血清心肌酶的影响

血清心肌酶谱在临床上主要作为诊断急性心肌梗塞 (AMI)的指标,作者发现烧伤、肢体骨折病人血液中的 LDH、CK、CK-MB、α-HBDH有明显的增加,有可能造成对原由心脏病史病人外伤后的误诊和医生对外伤病人病情分析时的误导。现就烧伤、骨折对血清心肌酶的影响分析如下。     

He-Ne激光对家兔血脂、心肌酶及血流变影响的实验研究

Ｈｅ－Ｎｅ激光对家兔血脂、心肌酶及血流变影响的实验研究朱启星，孙栩，杨永坚，张永华，余秋月，王家骥，朱剑华，叶琳激光不良生物学效应研究多集中在大功率照射对眼和皮肤的损伤［１，２］，而低功率反复照射，尤其是波长在３５００～７０００Ａ的激光对生化代谢和心...     

中医药防治硫酸镍对大鼠肾脏Na＋-K＋-ATP酶、Ca2＋-ATP酶活性影响的实验研究

目的　检测肾小管细胞膜Na K ATP酶、Ca2 ATP酶活性 ,探讨扶正解毒汤 (FJD)对NiSO4 致肾脏损伤的防治作用及其机理。方法　NiSO4 腹腔注射染毒 ,FJD灌胃防治 ,测定肾小管细胞膜Na K ATP酶及Ca2 ATP酶活性进行评价。结果　NiSO4 组与NS组比较 ,两种酶活性均明显抑制 (P <0 0 1)。用FJD防治后 ,两种酶活性明显改善 (P<0 0 1)。结论　FJD对NiSO4 致大鼠肾小管细胞膜Na K ATP酶、Ca2 ATP酶活性的抑制有恢复作用 ,可有效防治NiSO4 对肾脏的损害。     

铅对大鼠睾丸钙调素、ATP酶的抑制作用

[目的 ]研究铅对雄性生殖系统的毒性作用。 [方法 ]将大鼠睾丸制成匀浆 ,在不同浓度铅的作用下分别测定钙调素 (CaM)的活性及其依赖的Ca2 ATP酶的活性 ,并计算半数抑制浓度IC50 值。 [结果 ]Pb2 对CaM活性抑制的IC50为 2 0mmol/L ,对Ca2 ATP酶活性抑制的IC50 为 1 2mmol/L。 [结论 ]Pb2 不仅抑制了睾丸组织中CaM的活性 ,而且同时也抑制Ca2 ATP酶的活性 ,这可能是铅的雄性生殖毒性的生化机制     

慢性染铝对大鼠海马长时程增强及Ca2+浓度影响

目的 探讨慢性铝暴露对断乳后大鼠海马CA1区长时程增强及细胞内Ca²⁺浓度的影响.方法 54只大鼠随机分为3组,对照组(蒸馏水)和实验组(0.2%,0.6%AlCl3溶液).采用自由饮水方式染毒,连续80~90 d.测定血铝和脑铝含量、大鼠海马CA1区群体锋电位和大鼠海马细胞内Ca²⁺浓度.结果 各铝暴露组血铝和脑铝均明显高于对照组(P<0.01);高频刺激后,0.2%AlCl3组海马CA1区群体锋电位幅值增强率为117.70%;0.6%AlCl3组为109.77%,均明显低于对照组(P<0.01);且有随铝暴露浓度增加,群体锋电位幅值增强率逐渐降低的趋势;0.2%与0.6%AlCl3组海马细胞内Ca²⁺浓度分别为(228.38±51.74)和(195.43±36.95)nmol/L,与对照组比较,差异有统计学意义(P<0.01).结论 铝所致海马细胞内Ca²⁺浓度的降低可能是其影响长时程增强的机制之一.     

An in vivo and in vitro study of erythrocyte membrane acetylcholinesterase, (Na+, K+)-ATPase and Mg2+-ATPase activities in basketball players on alpha-tocopherol supplementation. The role of L-carnitine

BACKGROUND & AIMS: Vitamin E (alpha-tocopherol, alpha-Te) and carnitine reduce lipid peroxidation. THE AIM WAS TO: To investigate the erythrocyte membrane acetylcholinesterase (AChE), Na+, K+-ATPase and Mg2+-ATPase activities in basketball players with or without alpha-Te supplementation, before and after training. In vitro, we aimed to find out any additional effect of L-carnitine (L-C) on the modulated enzyme activities. SUBJECTS AND METHODS: Blood was obtained from 10 players before (group A), after exercise (group B) and after 1 month on alpha-Te (200 mg/24 h orally) supplementation before (group C) and after the game (group D). Lactate, pyruvate, muscle enzyme activities and total antioxidant status (TAS) were measured with commercial kits. Catecholamines and alpha-Te were determined with HPLC methods and membrane enzyme activities spectrophotometrically. RESULTS: Lactate, pyruvate, muscle enzymes and catecholamine levels were increased (P<0.001) in all groups after training. Alpha-Te levels and Mg2+-ATPase activity remained unaltered before and after exercise. TAS was decreased in the groups after the game. AChE activity was increased in group B (P<0.01) and decreased in group D (P<0.01). After the exercise, Na+, K+-ATPase activity was increased in group B and remained unaltered in group D. In vitro incubation of membranes from group D with L-C resulted in a partially restoration of the membrane AChE activity, whereas Na+, K+-ATPase and Mg2+-ATPase activities were found unchanged. CONCLUSIONS: Alpha-Te supplementation in basketball players results in an increase of TAS and AChE activity, whereas the other enzyme activities were found unchanged. L-C addition may restore AChE activity, which was modulated by training in players on alpha-Te.     

四氯化碳中毒大鼠肝脏Ca~(2 )-ATP酶和磷酸化酶a活性的研究

本实验采用雄性S.D.大鼠,经日一次灌注2.2ml/kg 四氯化碳,于染毒后12、24、48小时测定肝微粒体Ca~2 -ATP 酶和肝细胞液磷酸化酶a 活性变化。结果发现,染毒后大鼠肝微粒体Ca~2 -ATP 酶活性显著降低,以染毒后24小时为甚;肝细胞液磷酸化酶a 活性显著增高,以染毒后24小时为最高。说明四氯化碳致肝损伤时,肝内质网隔离钙的能力降低,胞液中钙浓度升高。本实验对于阐明四氯化碳中毒性肝病发病机理有一定的意义。     

乌贼墨对H22癌细胞内Ca2+浓度、核膜Ca2+/Mg2+-ATP 酶活性及c-jun表达的影响

利用荧光探针和免疫组织化学方法,研究了乌贼墨对Ｈ２２癌细胞内ＣＡ＾２＋浓度,核膜Ｃａ＾２＋／Ｍｇ＾２＋－ＡＴＰ酶活性及ｃ－ｊｕｎ表达的影响。结果发现,乌贼墨使Ｈ２２癌细胞内Ｃａ＾２＋浓度分别降低了６９％和７９％,核膜Ｃａ＾２＋／Ｍｇ＾２＋－ＡＴＰ酶活性分别降低了２１％和３７％,ｃ－ｊｕｎ表达明显减少。     

Effect of Type 2 Diabetes and Impaired Glucose Tolerance on Digestive Enzymes and Glucose Absorption in the Small Intestine of Young Rats

The reactions of intestinal functional parameters to type 2 diabetes at a young age remain unclear. The study aimed to assess changes in the activity of intestinal enzymes, glucose absorption, transporter content (SGLT1, GLUT2) and intestinal structure in young Wistar rats with type 2 diabetes (T2D) and impaired glucose tolerance (IGT). To induce these conditions in the T2D (n = 4) and IGT (n = 6) rats, we used a high-fat diet and a low dose of streptozotocin. Rats fed a high-fat diet (HFD) (n = 6) or a standard diet (SCD) (n = 6) were used as controls. The results showed that in T2D rats, the ability of the small intestine to absorb glucose was higher in comparison to HFD rats (p < 0.05). This was accompanied by a tendency towards an increase in the number of enterocytes on the villi of the small intestine in the absence of changes in the content of SGLT1 and GLUT2 in the brush border membrane of the enterocytes. T2D rats also showed lower maltase and alkaline phosphatase (AP) activity in the jejunal mucosa compared to the IGT rats (p < 0.05) and lower AP activity in the colon contents compared to the HFD (p < 0.05) and IGT (p < 0.05) rats. Thus, this study provides insights into the adaptation of the functional and structural parameters of the small intestine in the development of type 2 diabetes and impaired glucose tolerance in young representatives.     

Effect of norepinephrine on inhibition of mouse brain (Na+ + K+)-stimulated, (Mg++)-dependent, and (Ca++)-dependent ATPase activities by ethanol

Norepinephrine (0.1 mM) has been reported to "sensitize" (Na+ + K+)-ATPase activity of rat brain homogenates to inhibition by ethanol. The present study extends these investigations to the mouse and includes other ATPase activities. We measured the effects of norepinephrine on the sensitivity of ethanol-induced inhibition of (Na+ + K+)-stimulated (E.C. 3.6.1.3), (Mg++)-dependent (E.C. 3.6.1.4) and (Ca++)-dependent ATPase activities. Whole forebrains from C57BL/6J mice were homogenized and assayed in vitro for ATPase activity using standard conditions. Ethanol (0.125-2.0 M) caused a dose-dependent inhibition of all three ATPases. Norepinephrine (0.1 mM) had no appreciable effect on ethanol's inhibition of (Na+ + K+)-stimulated or (Ca++)-dependent ATPase activities, but slightly antagonized ethanol's effect on (Mg++)-ATPase. These results suggest that norepinephrine has little effect on the sensitivities of specific ATPases to ethanol inhibition in mouse brain.     

尼可地尔对STEMI患者经PCI后无复流现象、心肌再灌注损伤及心功能影响的研究

目的 探讨尼可地尔对ST段抬高型心肌梗死(ST-segment elevation myocardial infarction,STEMI)患者经皮冠状动脉介入治疗(percutaneous coronary intervention,PCI)后无复流现象、心肌再灌注损伤及心功能的影响研究.方法 选择2018年7月—2...     

太极拳运动对中老年人红细胞膜Na+-K+ATP酶和Ca2+-Mg2+ATP酶活性的影响

目的：探讨太极拳运动对中老年人红细胞膜Na^ -K^ ATP酶和Ca^2 -Mg^2 ATP酶活性的影响。方法：选取64名练习太极拳的中老年人为观察组，另选47名很少参加体育锻炼者为对照组，采两组研究对象的静脉血，检测Na^ -K^ ATP酶和Ca^2 -Mg^2 ATP酶的活性。结果：观察组2种ATP酶活性均高于对照组（P＜0．01）；性别间差异无显著性（P＞0．05）；2种酶活性均与练拳时间呈正相关（P＜0．05）。结论：太极拳运动能提高中老年人红细胞膜Na^ -K^ ATP酶和Ca^2 -Mg^2 ATP酶活性，改善细胞代谢功能，练拳时间越长，效果越好，从而促进健康，延缓衰老。