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1.
王伟民  王涵  李征 《安徽医药》2017,38(8):1016-1019
目的 探究比伐卢定对急性冠状动脉综合征(ACS)患者介入术后内皮损伤和炎性反应的影响。方法 选取2015年2月至2016年3月南阳市中心医院收治的90例行PCI患者,随机数表法分为观察组与对照组各45例。对照组采用常规肝素治疗,观察组则采用比伐卢定治疗。对比两组手术前后内皮损伤指标[血浆内皮素1(ET-1)、一氧化氮(NO)、血浆血管性假血友病因子(vWF)]、炎性指标[白介素-18(IL-18)、白介素-10(IL-10)、超敏C反应蛋白(hs-CRP)]、心功能指标[左心室舒张末期容积(LVEDV)、左心室收缩末期容积(LVESV)、左心室射血分数(LVEF)、脑钠肽(BNP)]变化及心脑血管不良事件发生率。结果 术前,两组患者内皮指标比较,差异无统计学意义(P>0.05),术后24 h,观察组ET-1及vWF水平均低于对照组[(68.37±6.17)ng/L vs(101.83±10.24)ng/L、(514.33±86.57)U/L vs(588.92±98.46)U/L],观察组NO水平高于对照组[(72.42±7.06)mmol/L vs(58.26±6.49)mmol/L],差异均有统计学意义(P<0.05)。观察组IL-18水平(53.84±23.67)pg/mL、hs-CRP水平(7.22±2.74)mg/L、LVEDV水平(88.63±10.24)mL、LVESV水平(32.47±4.26)mL及BNP水平(74.82±7.94)ng/L均低于对照组IL-18水平(73.58±26.79)pg/mL、hs-CRP水平(8.67±3.56)mg/L、LVEDV水平(95.16±9.58)mL、LVESV水平(44.83±5.72)mL及BNP水平(163.51±15.44)ng/L,IL-10水平(43.61±6.08)pg/mL及LVEF水平(51.82±10.19)%高于对照组IL-10水平(33.56±4.18)pg/mL及LVEF水平(39.14±9.28)%,差异有统计学意义(P<0.05)。两组患者术后1个月心脑血管不良事件发生率比较,差异无统计学意义(P>0.05)。结论 ACS患者术后采用比伐卢定治疗可有效缓解内皮损伤,同时可降低炎性反应,恢复心功能,治疗安全性高。  相似文献   

2.
彭巍巍  李晶 《安徽医药》2019,40(10):1124-1127
目的 探讨左卡尼汀辅治对伴心电图改变的重症手足口病(HFMD)患儿血清氨基末端前脑钠肽(NT-proBNP)水平和心功能的影响。方法 选取2015年7月至2018年8月河南省周口市中心医院收治的伴心电图改变的重症HFMD患儿92例为研究对象,根据随机数字表法分为观察组(n=46)和对照组(n=46)。对照组患儿给予抗病毒、退热等对症治疗,并根据患儿病情给予丙种球蛋白、血管活性药物、糖皮质激素治疗,必要时行机械通气等治疗。观察组患儿则在对照组基础上加用左卡尼汀注射液静脉滴注治疗。两组均连续治疗7天。比较两组临床疗效、治疗前后心肌酶谱指标、血清NT-proBNP与促炎因子超敏C反应蛋白(hs-CRP)、肿瘤坏死因子α(TNF-α)水平的差异,观察两组心功能指标变化及心电图恢复情况。结果 观察组治疗总有效率为93.48%,高于对照组的78.26%(P<0.05);治疗前后,观察组磷酸肌酸激酶同工酶(CK-MB)、NT-proBNP、hs-CRP、TNF-α水平变化差值分别为(27.50±10.32)IU/L、(1 462.70±486.28)ng/L、(3.13±1.20)mg/L、(24.45±3.22)ng/L,大于对照组的(22.52±9.71)IU/L、(1 042.78±114.33)ng/L、(1.53±1.42)mg/L、(19.28±3.52)ng/L,差异有统计学意义(P<0.05),观察组左心室射血分数(LVEF)、短轴收缩率(FS)变化差值分别为(6.07±1.68)%、(12.12±2.38)%,均大于对照组的(2.92±0.73)%、(8.19±1.45)%,差异有统计学意义(P<0.05);观察组心电图恢复率为78.26%,高于对照组的52.17%,差异有统计学意义(P<0.05)。结论 采用左卡尼汀辅助治疗伴心电图改变的重症HFMD患儿,能明显减轻其心肌损伤,增强其心功能。  相似文献   

3.
高晓晓  王俊杰  邹瑞 《安徽医药》2018,39(6):713-715
目的 探讨肾病综合征(NS)患者血浆总胆固醇(CHOL)、三酰甘油(TG)、高密度脂蛋白(HDL)、低密度脂蛋白(LDL)、载脂蛋白A1(Apo-A1)及载脂蛋白B (Apo-B)水平变化及临床意义。方法 选择2013年1月至2016年11月太和县人民医院收治的60例NS患者为NS疾病组,同期住院其他肾脏疾病患者30例(非NS患者)为疾病对照组,50例本院健康体检者为正常对照组,检测并比较治疗前3组对象的CHOL、TG、HDL、LDL、Apo-A1及Apo-B水平。结果 NS疾病组的CHOL、TG、HDL、LDL、Apo-A1及Apo-B水平分别为(9.18±2.50) mmol/L、(3.00±1.55) mmol/L、(1.65±0.53) mmol/L、(5.83±2.27) mmol/L、(1.66±0.42) g/L、(1.83±0.61) g/L;疾病对照组CHOL、TG、HDL、LDL、Apo-A1及Apo-B水平分别为(4.22±0.98) mmol/L、(1.89±1.35) mmol/L、(1.13±0.44) mmol/L、(2.39±0.70) mmol/L、(1.06±0.32) g/L、(0.88±0.22) g/L;正常对照组CHOL、TG、HDL、LDL、Apo-A1及Apo-B的水平分别为(4.42±0.46) mmol/L、(1.10±0.31) mmol/L、(1.33±0.21) mmol/L、(2.37±0.43) mmol/L、(1.31±0.17) g/L、(0.80±0.12) g/L。3组研究对象的生化指标差异有统计学意义(P<0.05),且NS疾病组各指标水平均高于疾病对照组、正常对照组,差异有统计学意义(P<0.05),而疾病对照组与正常对照组的TG、HDL和Apo-A1水平差异有统计学意义(P<0.05)。3组研究对象的CHOL、TG、HDL、LDL、Apo-A1及Apo-B的异常率差异有统计学意义(P<0.05)。结论 与正常健康人和非NS肾病患者比较,NS患者存在明显的血脂异常。  相似文献   

4.
目的 探讨3种输血方式对高危产妇围术期免疫功能的影响。方法 回顾性分析2018年2月至2020年3月佛山市高明区人民医院收治的120例高危产妇的临床资料,根据不同输血方式,分为自体组、混合组(同时输自体和异体血)和异体组,每组40例。比较3组产妇一般情况以及手术前后外周血T细胞亚群、免疫球蛋白和补体C3水平的差异。结果 自体组产妇手术前后CD4+/CD8+差值为(0.18±0.08),混合组为(0.43±0.16),异体组为(0.78±0.28),差异有统计学意义(P<0.05)。自体组产妇手术前后免疫球蛋白G水平差值为(0.42±0.13)g/L,混合组为(3.52±0.96)g/L,异体组为(6.14±1.78)g/L,差异有统计学意义(P<0.05)。自体组产妇手术前后免疫球蛋白A水平差值为(0.17±0.08)g/L,混合组为(1.02±0.28)g/L,异体组为(1.32±0.30)g/L,差异有统计学意义(P<0.05)。自体组产妇手术前后C3水平差值为(0.49±0.23)g/L,混合组为(0.22±0.14)g/L,异体组为(0.04±0.02)g/L,差异有统计学意义(P<0.05)。结论 在3种输血方式中,自体输血对高危产妇围术期免疫功能影响最小,建议临床采用此输血方式。  相似文献   

5.
目的:观察辛伐他汀对一氧化氮(NO)缺乏性高血压大鼠心脏局部肾素-血管紧张素系统(RAS)的影响。方法:24只Wistar大鼠随机分为正常对照组(C组)、硝基精氨酸甲酯(L-NAME)组(L组)和L-NAME+辛伐他汀组(L+S组)。每2wk尾袖法测定动脉收缩压,8wk后测定血清甘油三酯(TG)、总胆固醇(TC)及血清和心肌组织血管紧张素Ⅱ(AngⅡ)水平、血管紧张素转移酶(ACE)活性。结果:L组大鼠血压与同期C组血压相比有极显性差异(P<0.01),辛伐他汀干预未对增高的血压产生明显影响(P>0.05);各组大鼠血清TG和TC水平比较也无显性差别(P>0.05)。与C组相比,L组大鼠血清ACE活性明显降低(P<0.01),L组和L+S组大鼠血浆AngⅡ水平与C组比较无显性差异(P>0.05),心肌组织中AngⅡ水平和ACE活性则较C组明显增高(P<0.01);辛伐他汀干预后L+S组大鼠血清ACE活性升高,但与L组无显性差异(P>0.05),心肌ACE活性和AngⅡ水平则均比L组明显降低(P<0.05)。结论:辛伐他汀可能通过降低局部心肌组织ACE活性抑制NO缺乏性高血压大鼠心脏局部RAS活性,减少AngⅡ生成,这种作用独立于调脂和降压作用之外。  相似文献   

6.
目的 探讨髓鞘碱性蛋白(MBP)及髓鞘蛋白P2在儿童格林-巴利综合征中的临床意义。方法 收集2014年1月至2015年6月于郑州市儿童医院神经内科住院符合格林-巴利综合征诊断的患儿30例,患儿血清行MBP及髓鞘蛋白P2检测,与正常健康体检患儿30例进行对照。部分患儿分别于病程第1~3天及第4~7天采集2份血清进行上述指标检测并比较。结果 研究组患者血清MBP[(3 397.82±2 112.39)ng/L]、髓鞘蛋白P2[(1 688.88±899.32)ng/L]明显高于对照组[(669.46±140.04)ng/L、(367.64±106.26)ng/L],差异有统计学意义(P<0.05);病程第4~7天血清MBP[(4 729.92±992.51)ng/L]、髓鞘蛋白P2[(2 255.38±512.21)ng/L]浓度高于病程第1~3天[(1 040.31±155.24)ng/L、(687.83±153.54)ng/L],差异有统计学意义(P<0.05)。结论 MBP及髓鞘蛋白P2与神经脱髓鞘密切相关。同时反映了神经损伤后髓鞘的崩解是一个渐进的过程,病情越重,血清中MBP、髓鞘蛋白P2浓度越高,有助于判断病情及预后。  相似文献   

7.
目的 探讨前列地尔联合缬沙坦对糖尿病肾病(DN)患者氧化应激水平、尿钠排泄及血管内皮活性的影响。方法 选取武汉市第一医院门诊与病房2021年11月—2022年10月期间收治的DN患者98例。根据治疗方案不同,分为对照组(49例)和试验组(49例)。对照组给予缬沙坦治疗,试验组给予前列地尔联合缬沙坦治疗,比较两组治疗前后氧化应激指标水平[晚期氧化蛋白产物(AOPP)、丙二醛(MDA)、超氧化物歧化酶(SOD)],比较治疗前后两组肾功能情况[肌酐(Scr)、尿素氮(BUN)、24 h尿微量白蛋白定量(MALB)];比较两组治疗前后24 h尿钠及血浆肾素、醛固酮水平情况;比较治疗前后两组血管内皮活性情况[血管内皮生长因子(VEGF)、一氧化氮(NO)、内皮素-1(ET-1)];观察两组临床疗效及不良反应情况。结果 治疗后,两组AOPP、MDA降低,SOD水平上升,且试验组低于对照组(P<0.05);治疗后,两组肌酐Scr、BUN、MALB水平降低,试验组更明显(P<0.05);治疗后,两组24 h尿钠升高,肾素、醛固酮水平降低,且试验组更明显(P<0.05);治疗后,两组VEGF、ET-1水平下降,NO水平升高,且试验组更明显(P<0.05),试验组疗效优于对照组(P<0.05),两组不良反应无明显差异(P>0.05)。结论 前列地尔联合缬沙坦治疗DN的疗效满意,可有效降低患者氧化应激水平,提高其尿钠排泄,改善内皮功能,且安全性较高,值得临床推广应用。  相似文献   

8.
王瑞丽  杨林  李磊 《安徽医药》2017,38(1):74-76
目的 观察孟鲁司特对反复呼吸道感染患者鼻咽抽吸物及血清炎症指标的影响。方法 选择2012年7月至2015年6月周口市中心医院收治的82例反复呼吸道感染患者,按照随机数字表法分为观察组与对照组,各41例。两组患者均给予常规基础治疗,观察组加用孟鲁司特治疗,监测治疗前后两组患者免疫球蛋白指标IgA、IgE、IgG,炎症因子IL-2、IL-4、IL-5、肿瘤坏死因子-α(TNF-α)、干扰素-γ(IFN-γ)及中性粒细胞、淋巴细胞、单核巨噬细胞、嗜酸性粒细胞、白三烯D4(LTD4)水平,比较两组免疫功能的改善及炎症水平的变化。结果 ①治疗后,观察组中性粒细胞、嗜酸性粒细胞、LTD4低于对照组[(3.78±0.16)×109/L、(0.52±0.71)×109/L、(190.32±92.14)pg/mL vs(4.14±1.13)×109/L、(0.83±0.66)×109/L、(234.62±88.43)pg/mL],单核巨噬细胞高于对照组[(2.25±0.93)×109/L vs(1.86±0.79)×109/L],差异均有统计学意义(P<0.05);②治疗后,观察组IgA、IgG高于对照组[(0.76±0.10)g/L、(0.39±0.06)g/L vs(0.69±0.11)g/L、(0.31±0.04)g/L],IgE低于对照组[(0.17±0.03)g/L vs(0.21±0.03)g/L],差异均有统计学意义(P<0.05);③治疗后,观察组IL-2、IFN-γ高于对照组[(260.71±18.62)pg/mL、(22.06±2.33)pg/mL vs(220.55±20.41)pg/mL、(15.38±5.98)pg/mL],IL-4、IL-5、TNF-α低于对照组[(11.06±8.06)pg/mL、(13.42±7.55)pg/mL、(7.55±1.02)pg/mL vs(20.04±12.22)pg/mL、(24.52±11.23)pg/mL、(14.33±2.18)pg/mL],差异均有统计学意义(P<0.05);④观察组治疗总有效率为78.05%,高于对照组的56.10%(P<0.05)。结论 采用孟鲁司特治疗反复呼吸道感染患者,治疗有效率高,患者血清炎症因子改善显著。  相似文献   

9.
吴明景 《安徽医药》2016,37(7):852-854
目的 检测慢性阻塞性肺疾病(COPD)患者血清炎症因子白介素6(IL-6)、白介素8(IL-8)、肿瘤坏死因子α(TNF-α)和超敏C反应蛋白(hs-CRP)水平,并分析IL-6、IL-8、TNF-α和hs-CRP水平与COPD临床加重期(AECOPD)的相关性。方法 选择2014年6月至2015年8月南京明基医院呼吸内科收治的120例COPD患者作为观察组,选取同期排除COPD的健康体检者120例作为对照组,根据疾病进展情况将观察组分为缓解组75例和加重组45例。利用化学发光法检测各组IL-6、IL-8、TNF-α和hs-CRP水平并做对比。结果 观察组IL-6、IL-8、TNF-α和hs-CRP水平分别为(34.2±14.8)mg/L、(76.7±20.4)pg/mL,(82.4±16.7)pg/mL和(27.2±6.4)mg/L,对照组为(7.8±2.6)mg/L、(9.4±3.2)pg/mL、(15.8±7.5)pg/mL和(2.1±0.8)mg/L,观察组IL-6、IL-8、TNF-α和hs-CRP水平明显高于对照组(P < 0.05);加重组IL-6、IL-8、TNF-α和hs-CRP水平分别为(40.2±17.4)mg/L、(83.5±24.3)pg/mL、(89.7±19.2)pg/mL和(29.6±6.6)mg/L,缓解组为(17.4±5.3)mg/L、(18.2±7.2)pg/mL、(26.8±12.2)pg/mL和(5.4±3.2)mg/L,加重组IL-6、IL-8、TNF-α和hs-CRP水平明显高于缓解组(P < 0.05)。结论 IL-6、IL-8、TNF-α和hs-CRP在COPD的诊断和预后评价上具有重要的临床意义。  相似文献   

10.
弓高云  刘芬  李金荣 《安徽医药》2018,39(4):453-455
目的 探讨动态脑电图联合神经元特异性烯醇化酶(NSE)在复杂性与单纯性热性惊厥患儿中的鉴别诊断价值。方法 以2014年9月至2016年3月郑州儿童医院收治的80例热性惊厥患儿为研究对象,其中,单纯性32例(单纯组),复杂性48例(复杂组),同期选择郑州儿童医院80例体检健康儿童作为对照组。单纯组与复杂组入院后行7 d的动态脑电图监测,并在惊厥发作后12、48 小时对其NSE水平进行测定,且与对照组进行比较。单纯组与复杂组患儿均随访1年,记录癫痫的发生情况。结果 单纯组患儿脑电波异常率(18.75%)低于复杂组(37.50%),差异有统计学意义(P<0.05);单纯组与复杂组患儿脑电图异常部位额颞叶(50.00% 55.56%)、弥漫性(33.33% 16.67%)、顶枕叶(33.33% 27.78%)与时相Ⅰ相(66.67% 61.11%)、Ⅱ相(33.33% 38.89%)分布比较,差异均无统计学意义(P>0.05)。惊厥发作后12、48小时,NSE水平复杂组[(15.98±2.96)ng/mL、(13.25±2.96)ng/mL]>单纯组[(13.89±2.86)ng/mL、(11.05±2.05)ng/mL]>对照组[(9.20±2.12)ng/mL、(9.21±2.14)ng/mL],3组间比较差异均有统计学意义(P<0.05)。惊厥发作后48小时,单纯组与复杂组NSE水平均低于惊厥发作后12小时的水平(P<0.05)。单纯组1年癫痫发生率9.36%,低于复杂组的27.08%(P<0.05)。动态脑电图监测与NSE联合检测的ROC曲线下面积为0.96(P<0.05)。结论 复杂性热性惊厥患儿脑电波异常率、NSE水平、癫痫发生率均高于单纯性热性惊厥患儿,动态脑电图监测与NSE联合检测的灵敏度与特异度较高。  相似文献   

11.
The circulating renin-angiotensin system plays an important role in cardiovascular homeostasis. More importantly, the local tissue renin angiotensin plays a pivotal role in cell growth and remodelling of cardiomyocytes and on the peripheral arterial vasculature. In addition, the renin angiotensin system is related to apoptosis, control of baroreflex and autonomic responses, vascular remodelling and regulation of coagulation, inflammation and oxidation. The cardioprotective and vascular protective effects of the angiotensin receptive blockade appears to be related to selective blockade of the angiotensin II (A-II) Type I (AT1) receptors. However, there is now growing evidence showing that some of the effects of AT-II receptor blockers (ARBs) are related to the activation of the kinin pathways. This paper will review some of the recent mechanisms related to the cardiovascular effects of angiotensin and more specifically of ARBs. This paper will present the novel data on the role of ARB in the development of atherosclerosis, vascular remodelling, coagulation balance and autonomic regulation. Finally, the role of ARBs, used alone or in combination with ACE inhibitor in patients with heart failure, will be discussed.  相似文献   

12.
SUMMARY 1. The incubation of kangaroo renin-substrate with renin from kangaroo, hog or sheep yields angiotensin having pressor activity in the rat.
2. Kangaroo angiotensin I is not reactive in radioimmunoassay which is sensitive to other forms of angiotensin I.
3. Kangaroo angiotensin I is converted by passage through the rat pulmonary circulation or by equine converting enzyme to a reactive product in radioimmunoassay for angiotensin II.
4. The findings suggest that the amino acid sequence of kangaroo angiotensin I differs from that of other known angiotensins.  相似文献   

13.
血管紧张素Ⅱ及其受体在肿瘤中作用的研究进展   总被引:1,自引:1,他引:0  
血管紧张素Ⅱ作为肾素-血管紧张素系统中的主要效应分子,除了收缩血管,调节血压功能外,还参与肿瘤的发生发展、炎症反应以及血管形成转移,并且发挥重要作用。该文就血管紧张素Ⅱ及其受体在肿瘤中的表达及信号传通路研究进展做一综述。  相似文献   

14.
There is convincing evidence that angiotensin II, through activation of the angiotensin II type 1 (AT1) receptor, is involved in the atherosclerotic process. Similarly, angiotensin receptor blockers decrease vascular inflammation, hypertrophy and thrombosis, which are the key components of the progression of atherosclerosis. In addition, in several animal models, angiotensin receptor blockade was able to inhibit atherosclerosis. However, the effects of angiotensin receptor blockers on clinical outcome in cardiovascular patients remains to be established. Contradictory results have been found on the reduction of the risk on myocardial infarctions and in-stent restenosis, although there is solid evidence for cerebroprotective effects of these receptor blockers. These differences may be related to the role of the AT2 receptor. This review discusses the role of angiotensin II and angiotensin receptor blockers in the atherosclerotic process and its translation into clinical practice.  相似文献   

15.
心力衰竭是多种心脏病的最终死亡原因,阻断肾素-血管紧张素-醛固酮系统(renin angiotensin aldosterone system,RAAS)是减慢心力衰竭病变进展的主要策略。血管紧张素转换酶抑制剂(angiotensin converting enzyme inhibitors,ACEI)和血管紧张素受体拮抗剂(angiotensin receptor blockers,ARB)是目前最常用的阻断RAAS的药物。本文对慢性心力衰竭评估,以及ACEI和ARB在慢性心力衰竭治疗中的应用进行综述。  相似文献   

16.
Objectives Angiotensin IV (Ang IV) is a metabolite of angiotensin II which acts on specific AT4 receptors identified as the enzyme insulin regulated aminopeptidase (IRAP). The transduction process of these receptors is unresolved, but Ang IV inhibits the aminopeptidase activity. Ang IV improves cognition in animal models thus there is a desire to develop metabolically stable analogues for further development. Methods Peptide analogues of Ang IV were obtained commercially or synthesised. Each peptide was tested in vitro for its ability to inhibit the aminopeptidase activity (IRAP) of mouse brain homogenates and for its effects on isolated rat uterine smooth muscle. Key findings [Des‐Val1]‐Ang IV, acetylated‐Ang IV‐amide, Ang IV‐amide and [des‐His4]‐Ang IV all inhibited IRAP. [Sar1, Ile8]‐Angiotensin II (10 µm ) had an effect greater than that of Ang IV or any of the other analogues studied. In isolated uterine smooth muscle, angiotensins II and IV induced contractions, which could be antagonised by an AT1‐receptor antagonist. None of the novel peptides induced uterine smooth muscle contractions, but [Sar1, des Arg2‐Gly8]‐angiotensin II showed significant antagonism of the contractile effects of angiotensin II and carboxyamide‐terminated Ang IV‐NH2 showed antagonism of Ang IV‐induced contractions. Conclusions This study provides five novel inhibitors of IRAP worthy of assessment in behavioural models of learning and memory. The analogues are devoid of AT1 receptor agonist properties, and the carboxyamide analogue presents an opportunity to elucidate the mechanism of action of Ang IV as, like Ang IV, it inhibits IRAP, but antagonises the effects of Ang IV on isolated smooth muscle.  相似文献   

17.
The non-peptide angiotensin II receptor antagonists represent a new class of drugs with demonstrated efficacy in the treatment of hypertension. Eprosartan is a potent, orally active AT1 receptor antagonist which is chemically distinct from losartan and other non-peptide angiotensin II receptor antagonists. Eprosartan has a high affinity for the angiotensin II AT1 receptor, but does not interact with the AT2 receptor, adrenergic receptors or other receptors involved in cardiovascular regulation. In contrast to most other angiotensin II antagonists, eprosartan is a true competitive antagonist of the AT1 receptor. Eprosartan is effective in antagonising the cardiovascular and renal effects of exogenous angiotensin II in both experimental animals and humans. Furthermore, it is an effective antihypertensive agent when administered to renin-dependent hypertension animal models, and in patients with mild to severe hypertension. The antihypertensive effect of eprosartan is maintained over a 24-h interval following a single dose with no reported dose-dependent adverse side-effects.  相似文献   

18.
The possible existence of intramolecular interactions involving the tyrosine and histidine residues in angiotensin II has been investigated by measuring the reactivities of the functional groups in the molecule. Angiotensin II catalyzed the hydrolysis of p-nitrophenylacetate in the pH range 6.6–8.2 at higher rates than were consistent with the reactivities of the free constituent functional groups, and had 2–4% of the activity of chymotrypsin between pH 6.6 and 7.5. Treatment of angiotensin II with acetic anhydride demonstrated that the tyrosine hydroxyl and the imidazole side-chain in angiotensin II acetylated and deacetylated at markedly higher rates than for the free amino acids, indicating increased nucleophilicities and the presence of intrinsic deacetylation mechanisms for these residues in angiotensin II. These findings are consistent with the presence of tyrosine hydroxyl-histidine-carboxylate charge relay system in ANG II in aqueous environments, and suggest that ANG II may act at membrane receptors by a mechanism which is analogous to that operating in serine proteases.  相似文献   

19.
奥美沙坦:一种新的血管紧张肽Ⅱ受体拮抗剂   总被引:6,自引:0,他引:6  
奥美沙坦 (olmesartan)是最新的血管紧张肽Ⅱ受体 (AT1)拮抗剂 ,对不同程度的高血压均有很好的降压作用 ,病人对其亦有很好的耐受性。本文对该药的药效学、药动学和临床应用等研究作一综述  相似文献   

20.
血管紧张素受体及其拮抗剂与肾脏病关系   总被引:5,自引:0,他引:5  
肾素血管紧张素系统(RAS)在肾脏病变及其慢性进展中起着非常重要的作用,体内血管紧张素水平升高,可引进血液动力学变化及肾脏分泌众多细胞因子,促进并加重肾脏损害。如何阻断RAS一直是肾脏病学界关注的焦点。近年来随着血管紧张素受体拮抗剂的出现,其与肾脏疾病的关系也日益受到人们的重视。  相似文献   

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