香烟烟雾对大鼠睾丸NO含量及Na~+-K~+-ATP酶、Ca~(2+)-ATP酶活性的影响

目的探讨香烟烟雾对大鼠睾丸组织一氧化氮(NO)含量、Na~+-K~+-ATP酶及Ca~(2+)-ATP酶活性的影响。方法清洁级健康雄性SD大鼠40只,随机分为对照组和低、中、高剂量染毒组(即0、10、20和30支香烟组),每组10只。染毒组大鼠置于自制被动染毒箱中,采用静式染毒方法,1次/d,连续8周。观察大鼠左侧睾丸组织形态结构,测定右侧睾丸组织匀浆中NO含量及Na~+-K~+-ATP酶、Ca~(2+)-ATP酶活性。结果各组大鼠体重增量比较,高剂量染毒组较对照组明显降低,差异有统计学意义(P0.01);与对照组相比,高剂量染毒组大鼠睾丸中NO含量明显升高,Na~+-K~+-ATP酶和Ca~(2+)-ATP酶的活力均明显降低,差异有统计学意义(P0.01);睾丸组织病理学发现,随着染毒剂量的增加,生精小管出现不同程度的退行性改变。结论香烟烟雾可通过改变大鼠睾丸组织中NO含量,降低Na~+-K~+-ATP酶和Ca~(2+)-ATP酶的活力,引起大鼠睾丸损伤。     

bFGF对慢性酒精中毒大鼠肝组织ATP酶活力的影响

目的 观察碱性成纤维细胞生长因子(bFGF)对慢性酒精中毒大鼠肝组织Na+-K+-ATP酶活力和Ca2+-Mg2+-ATP酶活力的影响,探讨bFGF对慢性酒精中毒所致的肝损伤的保护作用.方法 选择成年Wistar雄性大鼠,采用白酒灌胃建立慢性酒精中毒模型,慢性酒精中毒模型建立成功的大鼠随机抽签法分为酒精中毒对照组、生理盐水(NS)对照组和bFGF治疗组.另10只不灌白酒作为正常对照组.bFGF治疗组大鼠白酒灌胃的同时,1h后按12μg/kg剂量肌肉注射,共14d.各组大鼠到相对应的时间点取出肝组织制成匀浆,测定肝组织匀浆中Na+-K+-ATP酶活力和Ca2+-Mg2+-ATP酶活力.结果 与正常对照组相比,慢性酒精中毒后大鼠肝组织中Na+-K+-ATF酶活力及Ca2+-Mg2+-ATP酶活力均明显降低(P<0.05);经bFGF治疗后肝组织中Na+-K+-ATP酶活力和Ca2+-Mg2+-ATP酶活力均明显高于酒精中毒对照组及NS对照组(P<0.05).结论 bFGF能提高慢性酒精中毒肝组织中Na+-K+-ATP酶活力及Ca2+-Mg2+-ATP酶活力,提示bFGF对慢性酒精中毒所致的肝损伤具有保护作用.     

参附注射液对大鼠肝缺血再灌注损伤时ATP酶的影响

目的:研究参附注射液对肝缺血再灌注损伤大鼠的保护作用及可能机制。方法:将36只大鼠随机分为参附注射液(SF)组与生理盐水对照(NS)组。肝脏缺血15min,分别于再灌注后1、3、24h取肝组织测定Na+-K+-ATP酶、Ca2+-Mg2+-ATP酶水平,并行酶组织化学染色,观察Ca2+-ATP酶的活性变化。结果:再灌注1、3h后,SF组肝组织中Na+-K+-ATP酶、Ca2+-Mg2+-ATP酶水平显著高于NS组;但在24h时,2组数据无显著性差异(P>0.05)。结论:参附注射液可以通过保护ATP酶发挥对大鼠肝缺血再灌注损伤早期保护作用。     

芍药苷对脑缺血再灌注沙土鼠ATP酶和兴奋性氨基酸的影响

目的探讨芍药苷对沙土鼠脑缺血再灌注（CI/R）损伤的保护作用及其作用机制。方法采用结扎双侧颈总动脉缺血10 min再灌注6 h,建立沙土鼠CI/R模型,随机分为假手术组、模型组、芍药苷3个剂量组（20、10、5 mg·kg^-1）,每组10只,术前3天开始腹腔注射给药。观察再灌注6 h内神经症状,计算卒中指数;取脑组织匀浆,定磷法测定ATP酶活性,高效液相色谱法测定谷氨酸（Glu）和天冬氨酸（Asp）含量。结果与模型组比较,芍药苷各剂量均能降低CI/R沙土鼠的卒中指数（P〈0.05或P〈0.01）,各剂量均可显著升高脑组织Ca2＋-ATP酶活性（P〈0.05）,高、中剂量组能显著升高Na＋-K＋-ATP酶活性（P〈0.05或P〈0.01）,各剂量均能降低脑组织Glu含量（P〈0.05或P〈0.01）。芍药苷对脑组织Mg2＋-ATP酶活性和Asp含量则无明显影响。结论芍药苷预处理对CI/R损伤的保护作用与其保护脑细胞膜ATP酶的活性、抑制Glu的释放、降低兴奋性氨基酸毒性等有关。     

盐酸阿罗洛尔对乌头碱致急性心律失常的保护作用及机制

目的:研究盐酸阿罗洛尔对乌头碱致大鼠急性心律失常的保护作用及机制。方法:取大鼠随机分为正常对照组、模型组、阳性对照(盐酸胺碘酮54 mg.kg-l)组和盐酸阿罗洛尔(7.2、3.6、1.8 mg.kg-l)组,每组10只,每日灌胃给予相应药物1次,连续给药3 d,末次给药1 h后,除正常对照组外其他大鼠舌下静脉注射乌头碱诱发心律失常模型,观察各组大鼠发生心律失常的乌头碱阈剂量、持续时间、死亡率以及血清中超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量,心肌组织中Na+-K+-ATP酶、Ca2+-ATP酶活性。结果:模型组乌头碱致心律失常阈剂量为(15.2±2.3)μg.kg-l,心律失常持续时间为(69.0±18.8)min,大鼠死亡率为70%,与正常对照组比较,模型组大鼠SOD、Na+-K+-ATP酶、Ca2+-ATP酶活性均明显降低,MDA含量明显升高(P<0.01);与模型组比较,阳性对照组和盐酸阿罗洛尔中、高剂量组乌头碱阈剂量明显升高,死亡率明显降低,SOD、Na+-K+-ATP酶、Ca2+-ATP酶活性均明显升高,MDA含量明显降低(P<0.05或P<0.01),盐酸阿罗洛尔低剂量组除死亡率明显降低和Na+-K+-ATP酶、Ca2+-ATP酶活性明显升高(P<0.01)外其余指标无明显变化。结论:盐酸阿罗洛尔具有抗乌头碱致大鼠急性心律失常的作用,且呈剂量依赖性。     

葛根素对糖尿病大鼠胰腺线粒体氧化应激及ATP酶的影响

目的探讨葛根素对糖尿病大鼠胰腺线粒体氧化应激及ATP酶的影响。方法将30只Wistar大鼠分为正常对照组、糖尿病组(DM组)和糖尿病治疗组(Pue组,采用葛根素注射液治疗),前两组注射等体积的0.9%氯化钠溶液。8周后,测3组大鼠血清葡萄糖、胰岛素、胰腺线粒体丙二醛(MDA)水平及超氧化物歧化酶(SOD)、Na+-K+-ATP酶(Na+-K+-ATPase)和Ca2+-ATP酶(Ca2+-ATPase)的活性。结果 (1)DM组大鼠血糖和MDA含量明显高于对照组(P<0.001),而血清胰岛素水平、SOD、Na+-K+-ATPase和Ca2+-ATPase活性显著降低(P<0.05)。(2)Pue组大鼠血糖及MDA含量较DM组显著降低(P<0.05),血清胰岛素水平、SOD、Na+-K+-ATPase和Ca2+-ATPase活性显著升高(P<0.05),差别有统计学意义。结论葛根素可减轻糖尿病大鼠胰腺线粒体氧化应激水平。     

葛根素对糖尿病大鼠胰腺线粒体氧化应激及ATP酶的影响

目的 探讨葛根素对糖尿病大鼠胰腺线粒体氧化应激及ATP酶的影响.方法 将30只Wistar大鼠分为正常对照组、糖尿病组(DM组)和糖尿病治疗组(Pue组,采用葛根素注射液治疗),前两组注射等体积的O.9%氯化钠溶液.8周后,测3组大鼠血清葡萄糖、胰岛素、胰腺线粒体丙二醛(MDA)水平及起氧化物歧化酶(SOD)、Na+-K+-ATP酶(Na+-K+-ATPase)和Ca2+-ATP酶(Ca2+-ATPase)的活性.结果 (1)DM组大鼠血糖和MDA含量明显高于对照组(P<0.001),而血清胰岛素水平、SOD、Na2-K+-ATPase和ca2+-ATPase活性显著降低(P<0.05).(2)Pue组大鼠血糖及MDA含量较DM组显著降低(P<0.05),血清胰岛素水平、SOD、Na+-K+-ATPase和Ca2+-ATPase活性显著升高(P<0.05),差别有统计学意义.结论 葛根素可减轻糖尿病大鼠胰腺线粒体氧化应激水平.     

关苍术乙酸乙酯提取物对大鼠缺血再灌注损伤心肌保护作用的研究

目的:研究关苍术乙酸乙酯提取物对大鼠心肌缺血再灌注损伤的保护作用及可能机制。方法:将50只大鼠随机分为假手术组、模型组、关苍术乙酸乙酯提取物低、高剂量(200、400mg.kg-1)组及维拉帕米(阳性药物)组,各组心肌缺血40min。分别于再灌注30min后取心肌组织,测定谷胱甘肽过氧化物酶(GSH-Px)的活力,心肌线粒体钙(Mit-Ca2+)的含量,心肌细胞膜Na+-K+-ATP酶、Mg2+-ATP酶的活力。结果:再灌注30min后,关苍术乙酸乙酯提取物组心肌组织中的GSH-Px活力显著高于模型组;心肌Mit-Ca2+的含量显著低于模型组;心肌细胞膜Na+-K+-ATP酶、Mg2+-ATP酶的活力显著高于模型组。结论:关苍术乙酸乙酯提取物通过增加心肌组织中GSH-Px酶的活力,降低Mit-Ca2+的含量,增加心肌细胞膜Na+-K+-ATP酶、Mg2+-ATP酶的活力,来发挥对大鼠心肌缺血再灌注损伤的保护作用。     

大蒜素对阿霉素性心衰大鼠心功能的保护作用及其线粒体机制

目的：探讨大蒜素对阿霉素性心衰大鼠心功能的保护作用及其线粒体机制。方法：将雄性SD大鼠随机分为正常对照组、大蒜素对照组、心衰模型组和不同剂量的大蒜素治疗组。给心衰模型组和大蒜素治疗组大鼠尾静脉注射阿霉素（4mg·kg-1,每5天1次,共3次）,第3次注射后,给大蒜素治疗组大鼠经口使用大蒜素（剂量分别为3、10和30mg·kg-1·d-1）,3周后测定该组大鼠左心室血流动力学指标、线粒体活性氧（ROS）和丙二醛（MDA）含量、线粒体肿胀程度以及线粒体超氧化物歧化酶（SOD）、Na＋-K＋-ATP酶和Ca2＋-ATP酶的活性。结果：治疗3周后,与心衰模型组相比,大蒜素治疗组大鼠左心室发展压、左心室内压最大上升和下降速率显著提高,左心室舒张末压力升高的状况明显减轻,心肌线粒体ROS、MDA含量明显降低,线粒体肿胀程度显著降低,线粒体SOD活性和ATP酶活性明显提高,且上述变化均呈剂量依赖性。结论：大蒜素可剂量依赖性减轻阿霉素性心衰大鼠的心功能损伤,这种保护作用可能与其提高线粒体抗氧化能力、减轻氧化应激损伤、抑制线粒体肿胀及维持膜ATP酶活性有关。     

维生素E对大鼠心肌缺血再灌注损伤的影响

目的 观察大鼠心肌缺血再灌注(MIR)时ICAM-1和自由基代谢的变化及维生素E对其的影响,探讨大鼠MIR损伤的可能机制.方法 大鼠30只,分为假手术对照组(sham)、MIR组和维生素E MIR组,免疫组织化学法检测心肌ICAM-1蛋白表达.检测血清、心肌组织SOD、MDA和GSH-PX及心肌线粒体Na -K -ATP酶、Mg -ATP酶、Ca -ATP酶活性等自由基代谢指标.结果 与sham组相比,MIR组心肌线粒体Na -K -ATP酶、Mg -ATP酶、Ca -ATP酶活性明显下降;用维生素E4周后心肌线粒体Na -K -ATP酶、Ca -ATP酶活性明显升高.与sham组相比,MIR组血清、心肌MDA明显升高,血清、心肌SOD和GSH-PX明显降低;用维生素E4周后心肌MDA低于MIR组,血清、心肌SOD和GSH-PX水平高于MIR组.与sham组相比,MIR组心肌ICAM-1蛋白质表达明显升高;用维生素E后心肌ICAM-1蛋白质表达低于MIR组.结论 MIR时有大量ICAM-1蛋白表达,与心肌损伤关系密切.维生素E可通过减少ICAM-1蛋白表达水平.起心肌保护作用.在MIR时自由基产生增多,维生素E能加速自由基的清除,增强机体的抗氧化能力,从而保护心肌组织免受氧化损伤.     

复合离子盐对老年人细胞内Na+、K+、Ca2+的影响及其机制

目的：观察复合离子盐对老年人细胞内Na^＋、K^＋、Ca^2＋及红细胞膜钠泵和钙泵活性的影响。方法：在天津市河东区社区中抽取226例老年人作为研究对象．其中高血压者112例。正常血压者114例。两者再随机分为离子盐组和普通加碘盐组．分别给予复合离子盐和普通加碘盐摄入，6个月后观察研究对象细胞内Na^＋、K^＋、Ca^2＋及钠泵、钙泵活性的变化。结果：6个月时高血压患者中离子盐组细胞内钠、钙离子浓度低于基线水平（P〈0．05），但钾离子无明显变化。离子盐组钠泵、钙泵活性均明显高于基线水平（P〈0．05），但在正常血压者中，2组与基线水平比较差异无统计学意义。结论：复合离子盐可增强钠泵、钙泵活性，使细胞内的钠、钙含量减少。     

青龙衣多糖对H22型肿瘤细胞的ATPase活性影响的研究

目的 研究青龙衣多糖对H22型肿瘤细胞的ATPase活性的影响。方法 按照测定无机磷含量的方法对H22肿瘤细胞的Ca^2＋-ATPase、Na^＋K^＋-ATPase和Mg^2＋-ATPase活性进行了测定。结果 发现青龙衣多糖可以降低ATPase的活性，除青龙衣多糖中、高剂量组显著抑制Ca^2＋-ATPase活性。高、中、低剂量组都显著降低Na^＋-K^＋-ATPase和Mg^2＋-ATPase活性（P〈0．05）。结论 ATPase活性降低导致了膜电位下降。细胞容积降低．可能引起细胞凋亡发生．Ca^2＋．调节凋亡发生．Mg^2＋调控ATPase的活性,可能是青龙衣多糖抗肿瘤的机制之一。     

颈交感神经阻滞对放烧复合伤大鼠小肠组织血流量及ATP酶的影响

目的：探讨颈交感神经阻滞对放烧复合伤大鼠小肠组织血流量及ATP酶的影响。方法：SD大鼠接受5Gy^60Coγ射线全身性一次照射加TBSA15％Ⅲ度烧伤．随机分为复合伤对照组和复合伤加SB治疗组。检测不同时相点小肠黏膜、浆肌层组织血流量；肠黏膜Na^＋-K^＋-ATP酶、Ca^2＋-ATP酶活性。结果：放烧复合伤后7天内小肠黏膜和浆肌层血流量明显减少，肠黏膜Na^＋-K^＋-ATP酶、Ca^2＋-ATP酶活性急剧下降；SB治疗组较复合伤组小肠血液灌注量明显增加，同时Na^＋-K^＋-ATP酶、Ca^2＋-ATP酶活性增高。结论：SB可增加放烧复合伤大鼠小肠组织血液灌流，增加小肠黏膜ATP酶活性，改善肠道组织缺血缺氧和细胞能量代谢障碍。     

Selective effect of chronic lead ingestion on tyrosine hydroxylase activity in brain regions of rats.

Alterations of tyrosine hydroxylase activity in various regions of brain from rats postnatally exposed to lead were tested. Three groups of animals were prepared; (1) Rats exposed to lead at a low dose (0.05% lead acetate, PbAc); (2) Rats exposed to lead at a high dose (0.2% PbAc); (3) Age-matched normal control rats. At 2, 4, 6, and 8 weeks of age, weight of brain and body, and concentrations of lead in whole brain of animals in each group were measured. Activities of tyrosine hydroxylase and Na(+)-K+ ATPase were also measured at the same ages in 4 brain regions of each animal. Body weight gain was decreased after 6 weeks of age in rats exposed to lead at a high dose. Concentrations of lead in whole brain were increased from 0.37 to 0.83 (ng/mg wet tissue) in these animals. Exposure of rats to lead generally increased tyrosine hydroxylase activity and decreased Na(+)-K+ ATPase activity. However, changes of tyrosine hydroxylase activity were detected without concomitant changes of Na(+)-K+ ATPase activity in pons-medulla at 2 weeks of age and telencephalon at 6 weeks of age in rats exposed to lead at a low dose, and in midbrain at 4 and 6 weeks of age in rats exposed to lead at a high dose. These data imply that catecholaminergic nervous system in the brain regions described above could be selectively affected by lead.     

葡萄糖酸镁对大鼠心肌缺血再灌注损伤的保护作用

目的:观察葡萄糖酸镁对心肌缺血再灌注损伤的影响,探讨葡萄糖酸镁心肌保护作用及其机理。方法:采用改进了的整体大鼠急性心肌缺血再灌注损伤模型,检测组织内Na+- K+- ATPase活力及丙二醛(MDA)和Ca2 +含量,并测定由ADP诱导的血小板5min最大聚集率AGG (M )。结果:与假手术组相比,缺血再灌注组心肌组织内Na+-K+ -ATPase活力显著下降(P <0 .0 1) ,MDA和Ca2 +含量明显升高(P<0 .0 1) ,AGG(M)升高(P <0 .0 5 )。与缺血再灌注组比较,葡萄糖酸镁3个不同剂量保护组心肌组织内Na+ -K+ -ATPase活力明显升高(P <0 .0 1) ,MDA和Ca2 +含量明显降低(P <0 .0 5或P <0 .0 1) ,AGG(M)也明显降低(P <0 .0 1) ,且各作用均随用药剂量的增加而更加显著。结论:葡萄糖酸镁对心肌缺血再灌注损伤有保护作用,其保护作用机制与增加Na+ -K+- ATPase活性、减轻钙超载和抑制脂质过氧化反应以及血小板聚集有关。     

(Na+ -K+)ATPase activity in erythrocyte membranes of spontaneously, one kidney-one wrapped, and deoxycorticosterone acetate--NaCl hypertensive rats

(Na+ -K+)ATPase activity in erythrocyte membranes of spontaneously (SHR), one kidney-one wrapped, and deoxycorticosterone acetate (DOCA)-NaCl hypertensive rats was studied. (Na+ -K+) ATPase activity decreased in both prehypertensive (6 weeks old) and hypertensive (14 weeks old) stages of SHR, suggesting that the alteration of this enzymic activity may be due to a pre-existing defect in the membrane rather than being a consequence of hypertension. By contrast, (Na+ -K+)ATPase activity remained unchanged in the one kidney-one wrapped hypertensive rats, whereas that of one kidney-one wrapped normotensive rats as well as that of DOCA-NaCl hypertensive rats was increased significantly (P less than 0.05). These changes were specific for (Na+ -K+) ATPase, since Mg2+-ATPase activity was not altered. The susceptibility of (Na+ -K+)ATPase to the inhibitory action of ouabain was not changed significantly. These findings indicate that (Na+ -K+)ATPase activities of erythrocyte membranes isolated from the different types of hypertensive rats were subject to different changes. Whether this phenomenon applies to the clinical distinctions among the various types of hypertension remains a subject for further investigation.     

亚慢性铅接触大鼠体内钙调素和腺嘌呤核苷三磷酸酶的影响

大鼠以1.318、5.272和10.545mmol醋酸铅染毒3个月。各染毒组大鼠全血中钙调素(CaM)含量和红细胞膜钙-腺嘌呤核苷三磷酸酶(Ca~(2+)-ATPase)活力显著下降,呈剂量-效应关系。高剂量组红细胞钠-钾-腺嘌呤核苷三磷酸酶(Na~+-K~+-ATPase)活力明显抑制。电镜细胞化学观察,肝细胞腺嘌呤核苷三磷酸酶电子密度变浅、分布减少。     

2型糖尿病患者血中升压因子作用机制的探讨

目的：了解２型糖尿病患者（ＮＩＤＤＭ）血中升压因子水平及相关离子转运酶的变化,探讨对血压相互影响的机制。方法：采用生我省在性测定方法测定了３２例２型糖尿病患者和３３例健康人血中升压因子活性,用化学法测定Ｎａ＾＋－Ｋ＾＋－ＡＴＰ酶、Ｃａ＾２＋－Ｍｇ＾２＋－Ｍｇ＾２＋－ＡＴＰ酶活性变化。结果：糖尿病组和正常组升压因子阳性纺有显著性差异;糖尿病组的升压模式与自发性高血压大鼠（ＳＨＲ）的有所不同;ＮＩＤＤ     

Acute delta 9-tetrahydrocannabinol exposure alters Ca2+ ATPase activity in neuroendocrine and gonadal tissues in mice

Acute administration of delta 9-tetrahydrocannabinol (THC) (50 mg/kg) at puberty (35-40 days) significantly (P less than 0.05) reduced Ca2+ ATPase activity in hypothalamic plasma membranes but increased, although not significantly, enzyme activity in hypothalamic tissue obtained from adult mice. In contrast, testicular Ca2+ ATPase activity was increased in pubertal THC-treated males, and significantly reduced in adults. Pituitary Ca2+ ATPase activity exhibited a dose-related decrease after acute THC administration at 0.5, 5 or 50 mg/kg, but there were no differential effects of age. Pituitary plasma membranes obtained from THC-treated males did not respond to in vitro exposure to luteinizing hormone releasing hormone (LHRH, 10(-7) M) with the marked reduction (approximately 40%) in Ca2+ ATPase activity observed in pituitaries from oil-treated controls. In addition, effects of THC appear specific for Ca2+ ATPase activity, since Mg2+ ATPase and Na+/K+ ATPase activities were not affected. These findings indicate that acute in vivo administration of THC influences Ca2+ membrane transport, in particular Ca2+ ATPase activity. These effects occur at each level of the hypothalamic-pituitary-gonadal (HPG) axis, are related to dose and developmental age at exposure, and also appear specific for Ca2+-dependent ATPase activity. Furthermore, THC exposure modulates pituitary sensitivity to LHRH receptor-mediated effects on Ca2+ ATPase activity. Therefore, effects on Ca2+ membrane transport may be involved in acute THC actions on hormonal activity at these HPG sites.