肾动脉狭窄介入治疗前后血清脑利钠肽水平的变化及意义的研究

目的探讨肾动脉狭窄介入治疗前后血清脑利钠肽BNP水平的变化及意义。方法采用回顾性调查方法，对肾动脉狭窄介入治疗前后血清脑利钠肽水平的变化进行分析。结果肾动脉狭窄介入治疗再通后，血清BNP水平出现下降（P〈0．01）。结论血清BNP水平的变化对肾动脉狭窄介入治疗后疗效的评价具有一定的临床指导意义。     

Vasodilator effects of C-type natriuretic peptide on cerebral arterioles in rats

The vasodilator effects of C-type natriuretic peptide (CNP) were investigated in isolated rat cerebral arterioles. CNP caused dose-dependent vasodilation, maximally by 10.0±2.2% at 10⁻⁶ M. The median effective concentration (EC₅₀) was 5.2×10⁻¹⁰ M. In contrast, atrial natriuretic peptide and B-type natriuretic peptide, other members of the natriuretic peptide family, produced little or no vasodilation. Pretreatment with methylene blue (10⁻⁴ M) abolished CNP-induced vasodilation, whereas pretreatment with N^G-monomethyl-

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-arginine or indomethacin did not inhibit vasodilation. Thus, CNP is suggested to cause significant vasodilation in cerebral arterioles via a cyclic guanosine monophosphate-dependent mechanism. © 1997 Elsevier Science B.V. All rights reserved.     

中枢和外周脑钠素(BNP)调节醛固酮分泌的不同作用

将BNP和AT-Ⅱ、ACTH AVP单独或BNP与这3种肽分别合并在大鼠icv或iv注入后观察血Ald浓度的变化。实验结果表明:①iv给予AVP(5μg/3ml·h~(-1))、ACTH(5μg/3ml·h~(-1))和AT-Ⅱ(5 v.g/3 ml·h(-1)),1h后均能增加血Ald的浓度。iv给予BNP(5μg/3ml·h(-1))能明显抑制AVP和ACTH的刺激作用,而不影响AT-Ⅱ的刺激作用。②icv给予BNP(2 Vg/10 pl NS)能降低血Aid浓度。icv给予AVP(2μg/10μl NS)能增加血Aid浓度,但ACTH(2μg/10μl NS)和AT-Ⅱ(2μg/10μl NS)无此种作用。但如脑室同时给予BNP(2μg/10μlNS)却可明显刺激Aid分泌。③icv注入BNP对外周注入的3种多肽的刺激作用无任何影响。从上述的实验结果可看出:脑内BNP可“反常”地增加AT-Ⅱ、ACTH和AVP对Ald分泌的刺激作用,与外周抑制AVP,ACTH的刺激作用不同。而脑内BNP不影响这3种多肽的外周刺激作用。结论是脑内BNP以其独特的方式调节Ald的分泌,控制水盐代谢。     

Atrial amyloid deposits in the failing human heart display both atrial and brain natriuretic peptide-like immunoreactivity

Atrial amyloid deposits are common in the ageing human heart and contain alpha-atrial natriuretic peptide (proANP99-126) immunoreactivity. However, atrial myocytes secrete both amino and carboxy terminal fragments of the ANP prohormone (proANP1-126) and also express an homologous, but separate brain natriuretic peptide (BNP). Characteristic amyloid deposits were identified in the atria of 9/22 patients (26-63 years of age) with end-stage heart failure. Amyloid fibrils displayed immunoreactivity for both amino and carboxy terminal fragments of proANP1-126 and for the distinct BNP sequence. As in other endocrine organs, both mature and precursor peptide sequences appear to be constituents of amyloid fibrils. Whilst immunoreactivity for cardiac peptide hormones is co-localized in atrial amyloid deposits, it is uncertain whether the increase in natriuretic peptide expression which accompanies cardiac failure contributes to the incidence of isolated atrial amyloidosis.     

老年难治性心力衰竭患者BNP、hs-CRP水平与心功能的相关性及其临床意义

【摘要】目的：探究老年难治性心力衰竭（心衰）患者BNP、hs-CRP水平与心功能的相关性及其临床意义。方法：以我院心内科近两年收治的61例老年难治性心衰患者为临床研究对象，作为心衰组，另选20例健康志愿者作为对照组。心衰组患者按照NYHA分级的不同，从低到高分成A、B、C三组。对患者进行BNP与hs-CRP测定，并测定患者的心功能LVDD和LVEF。跟踪记录患者的心血管事件发生情况，比较患者BNP、hs-CRP、LVEF、LVDD水平的差异。结果：与对照组相比，心衰组患者的LVDD、BNP与hs-CRP指标显著较高而LVEF指标显著较低；A、B、C三组患者的LVDD、BNP与hs-CRP指标逐渐升高、LVEF水平逐渐下降；与无心血管事件患者相比，出现心血管事件患者的BNP、hs-CRP、LVDD水平显著较高，LVEF指标则显著低。差异均具有统计学意义（P＜0.05）。结论：BNP与hs-CRP指标与老年难治性患者的心功能具有密切的关系，BNP、hs-CRP以及患者的LVEF、LVDD水平是临床诊断老年难治性心衰的重要标志物，具有重要的临床诊断价值。     

急性心肌梗死给予脑钠肽前体检测对溶栓治疗预后的评价

目的：本研究旨在观察成功溶栓患者中是否发生早期心血管事件,比较其血浆N氨基酸末端脑钠肽前体（NT-pro BNP）的差异,并研究其与血清肌钙蛋白T、肌酸激酶、肌酸激酶同工酶、左室射血分数、左室舒张末期容积之间的相关性,探讨测定血浆NT-pro BNP水平在评价急性心肌梗死（AMI）成功溶栓治疗的患者病情严重程度和预后的意义。方法：采用酶联免疫吸附法对61例ST段抬高型AMI患者应用瑞替普酶静脉溶栓治疗前测定NT-pro BNP。随访30 d,观察30 d内是否发生心血管死亡、心力衰竭、再发心肌梗死、梗死后心绞痛等情况。结果：两组的年龄、性别、身高、体重、吸烟与否、高血压、糖尿病以及心肌梗死的发生部位等指标比较差异无统计学意义（P〉0.05）,log NT-pro BNP水平与c Tn T、CK、CK-MB、LVEDV存在正相关（P〈0.05）,与LVEF存在负相关（P〈0.05）。结论：测定入院时血浆NT-pro BNP水平对评估AMI经过成功溶栓治疗的患者30 d内发生心血管事件有重要的临床价值。