脑钠肽超过多少为心衰_重组人脑钠肽对心衰患者心室重构的影响及机制

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  [摘要] 目的 研究重组人脑钠肽(rhBNP)对心衰患者心室重构的影响,并探讨其可能机制。方法 50例心衰患者随机分为rhBNP治疗组与对照组,每组25例,随访3个月,治疗前后分别测定LVEDD、EF及血清Ⅲ型前胶原(PCⅢ)、Ⅳ型胶原(CⅣ)、透明质酸(HA)和一氧化氮(NO)水平,并进行比较。结果 rhBNP治疗3个月后,血清PCⅢ、CⅣ和HA水平较治疗前显著降低[(100.8±10.5)μg/L vs (156.1±10.2)μg/L;(75.0±9.5)mg/L vs (105.7±11.0)mg/L;(85.2±9.3)mg/L vs (122.5±10.6)mg/L;P均<0.05],NO水平较治疗前显著增加[(92.20±9.6)μmol/L vs (76.82±10.1)μmol/L,P<0.05],对照组各指标无明显改变(P均>0.05)。结论 rhBNP治疗能改善心衰症状,减轻心室重构,其机制可能与降低血清中胶原水平、增加NO浓度有关。
  [关键词] 脑钠肽;心衰;胶原;透明质酸;一氧化氮
  [中图分类号] R541.6 [文献标识码] B [文章编号] 1673-9701(2011)21-80-02
  
  The Effects and Mechanisms of rhBNP on the Vantricular Remodeling in Patients with Heart Failure
  DU SongLUO PingWANG ShunbaoWANG Liuyi
  Department of Cardiology,Henan Province People’s Hospital,Zhengzhou 450003,China
  
  [Abstract] Objective To evaluate the effects and mechanisms of rhBNP on the vantricular remodeling in patients with heart failure. Methods Fifty patients with heart failure were selected and divided randomly into two groups:rhBNP treatment group and control group,each group had twenty-five patients. They were followed up for three months. The LVEDD and the concentrations of serum PCⅢ, CⅣ,HA and NO were measured before treatment and after three months treatment,then compared between two groups. Results After three months treatment,the concentrations of serum PCⅢ,CⅣ and HA decreased in rhBNP treatment group (100.8±10.5)μg/L vs (156.1±10.2)μg/L;(75.0±9.5)mg/L vs (105.7±11.0)mg/L;(85.2±9.3)mg/L vs (122.5±10.6)mg/L;all P<0.05;the levels of NO increased (92.20±9.6)μmol/L vs (76.82±10.1)μmol/L,P<0.05,while after three months followup,there were not significant differences of all observed indicators in control group(all P>0.05). Conclusion After rhBNP treatment,the serum levels of PCⅢ,CⅣ and HA decreased and the levels of serum NO increased,which contributed to the improvement of the vantricular remodeling.
  [Key words] BNP;Heart failure;Collagen;Hyaluronic acid;Natric oxide
  
  心力衰竭(心衰)是各种心脏病发展到晚期的共同表现,是严重危害人民健康的疾病之一。近些年,心衰的研究取得了较大的进步[1-4],人重组脑钠肽(rhBNP)治疗心衰取得一定疗效[5-9]。本研究旨在观察rhBNP治疗对心衰患者心室重构的影响并探讨其机制。
  1资料与方法
  1.1一般资料
  2010年1~6月收治的符合以下条件的心衰患者入选:①无rhBNP应用禁忌证;②能定期随访。共入选符合上述标准者50例,随机分为rhBNP治疗组及对照组,每组25例。
  1.2治疗方法
  患者入选后,超声测定左心室舒张末期内径、EF值;早晨空腹抽血留样测定血清PCⅢ、CⅣ、HA和NO水平,除心衰常规治疗如利尿剂、洋地黄制剂、血管紧张素转换酶抑制剂或血管紧张素Ⅱ受体拮抗剂之外,rhBNP组给予rhBNP治疗(商品名:新活素,诺迪康生物制药有限公司生产),用法:负荷量(1.5~2.0)μg/kg,维持量(0.0075~0.0100)μg/kg・min,连续静滴24h。随访3个月后复查两组各观察指标。
  1.3检测方法
  血清PCⅢ、CⅣ、HA测定采用放射免疫分析法,试剂盒由上海海研生物技术中心提供,NO测定采用比色法,试剂盒由南京聚力生物有限公司提供。
  1.4统计学处理
  采用SPSS15.0软件包进行统计学分析,资料以均数±标准差(χ±s)表示,治疗前后比较采用配对t检验,两组间比较采用t检验,P<0.05为差异有统计学意义
  2结果
  2.1治疗前两组基本资料的比较(表1)
   注:与对照组比较,*P>0.05
  表1结果显示治疗前rhBNP组与对照组年龄、性别、EF值、PCⅢ、CⅣ、HA、NO水平及超声左室舒张末期内径等各项参数之间差异无统计学意义(t值分别为0.29、0.35、0.46、0.43、0.39、0.28、0.36、0.33,P均>0.05),具有可比性。
  2.2rhBNP治疗对心衰患者左室舒张末期内径、血清纤维化指标水平的影响(表2)
  表2显示rhBNP治疗后3个月心衰患者EF明显提高(t值为2.90,P<0.05),血清PCⅢ、CⅣ和HA水平显著降低(t值分别为3.00、2.98、3.58,P均<0.05),NO水平增高(t值为4.23,P<0.05),超声左室舒张末期内径有减小趋势,但差异无统计学意义(t值为0.44,P>0.05);而对照组3个月后各指标无明显改变(t值分别为0.33、0.38、0.29、0.34、0.46,P均>0.05)。
  3讨论
  心力衰竭(心衰)是各种心脏病发展到晚期的共同表现,是严重危害人民健康的疾病之一。近些年,心衰的研究取得了较大的进步,尤其是脑钠肽的相关研究表明[10,11]:脑钠肽不仅是诊断心衰及评价心衰治疗效果的有效指标,而且已用于临床治疗,有限的资料表明近期临床效果满意[12-14],但其治疗心衰的详细机制尚未阐明,有关rhBNP对心衰患者心室重构的影响研究尚不多见。
  我们的研究发现:rhBNP治疗后3个月,治疗组心衰患者心功能明显改善,EF值增高,超声左室舒张末期内径有减少趋势,但无统计学差异,同时患者血清中纤维化指标PCⅢ、CⅣ、HA水平降低,NO水平增加。对照组各指标有增加趋势,但均无统计学差异。证明rhBNP治疗可改善心衰患者近期预后,减轻心室重构,其机制可能与rhBNP改善内皮功能、促进一氧化氮释放、抑制肾素-血管紧张素-醛固酮系统活性、降低血清中PCⅢ、CⅣ、HA水平、抑制炎症、减少心肌纤维化有关,与国外研究结论一致[15-17]。但是我们的研究为单中心、小样本研究,不同病因及合并疾病的心衰患者未详细分组,为进一步阐明rhBNP对心衰患者远期预后及心室重构的影响,尚需设计更多的多中心、大样本的随机、对照研究,为心衰的治疗提供更多循证医学的证据。
  
  [参考文献]
  [1] Karaahmet T,Tigen K,Dundar C,et al. The effect of cardiac fibrosis on left ventricular remodeling,diastolic function,and N-terminal pro-B-type natriuretic peptide levels in patients with nonischemic dilated cardiomyopathy[J]. Echocardiography,2010,27(8):954-960.
  [2] Ritchie RH,Rosenkranz AC,Kaye DM. B-type natriuretic peptide:endogenous regulator of myocardial structure,biomarker and therapeutic target[J]. Curr Mol Med,2009,9(7):814-825.
  [3] He JG,Chen YL,Chen BL,et al. B-type natriuretic peptide attenuates cardiac hypertrophy via the transforming growth factor-beta1/smad7 pathway in vivo and in vitro[J]. Clin Exp Pharmacol Physiol,2010,37(3):283-289.
  [4] George I,Morrow B,Xu K,et al. Prolonged effects of B-type natriuretic peptide infusion on cardiac remodeling after sustained myocardial injury[J]. Am J Physiol Heart Circ Physiol,2009,297(2):H708-717.
  [5] He J,Chen Y,Huang Y,et al. Effect of long-term B-type natriuretic peptide treatment on left ventricular remodeling and function after myocardial infarction in rats[J]. Eur J Pharmacol,2009,602(1):132-137.
  [6] Rubattu S,Sciarretta S,Valenti V,et al. Natriuretic peptides:an update on bioactivity,potential therapeutic use,and implication in cardiovascular diseases[J]. Am J Hypertens,2008,21(7):733-741.
  [7] Hillock RJ,Frampton CM,Yandle TG,et al. B-type natriuretic peptide infusions in acute myocardial infarction.Heart[J]. 2008,94(5):617-622.
  [8] McKie PM,Rodeheffer RJ,Cataliotti A,et al. Amino-terminal pro-B-type natriuretic peptide and B-type natriuretic peptide:biomarkers for mortality in a large community-based cohort free of heart failure[J]. Hypertension,2006,47(5):874-880.
  [9] Wang LF,Wu S,Guan XR,et al. Relationship between plasma brain natriuretic peptide concentration and clinical prognosis in patients of acute myocardial infarction[J]. Zhonghua Xin Xue Guan Bing Za Zhi,2005,33(3):234-237.
  [10] de Denus S,Pharand C,Williamson DR. Brain natriuretic peptide in the management of heart failure: the versatile neurohormone[J]. Chest,2004,125(2):652-668.
  [11] Kapoun AM,Liang F,O"Young G,et al. B-type natriuretic peptide exerts broad functional opposition to transforming growth factor-beta in primary human cardiac fibroblasts:fibrosis,myofibroblast conversion,proliferation,and inflammation[J]. Circ Res,2004,94(4):453-461.
  [12] Cataliotti A,Malatino LS,Jougasaki M,et al. Circulating natriuretic peptide concentrations in patients with end-stage renal disease:role of brain natriuretic peptide as a biomarker for ventricular remodeling[J]. Mayo Clin Proc,2001,76(11):1111-1119.
  [13] Ogawa Y,Tamura N,Chusho H,et al. Brain natriuretic peptide appears to act locally as an antifibrotic factor in the heart[J]. Can J Physiol Pharmacol,2001,79(8):723-729.
  [14] Tamura N,Ogawa Y,Chusho H,et al. Cardiac fibrosis in mice lacking brain natriuretic peptide[J]. Proc Natl Acad Sci USA,2000,97(8):4239-4244.
  [15] Rosenkranz AC,Woods RL,Dusting GJ,et al. Antihypertrophic actions of the natriuretic peptides in adult rat cardiomyocytes:importance of cyclic GMP[J]. Cardiovasc Res,2003,57(2):515-522.
  [16] Zhang Q,Moalem J,Tse J,et al. Effects of natriuretic peptides on ventricular myocyte contraction and role of cyclic GMP signaling[J]. Eur J Pharmacol,2005,510(3):209-215.
  [17] Tan T,Scholz PM,Weiss HR. Hypoxia inducible factor-1 improves the negative functional effects of natriuretic peptide and nitric oxide signaling in hypertrophic cardiac myocytes[J]. Life Sci,2010,87(1-2):9-16.
  (收稿日期:2011-05-26)
  
  注:本文中所涉及到的图表、注解、公式等内容请以PDF格式阅读原文
  

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