[摘要] 目的 研究重組人腦鈉肽(rhBNP)對心衰患者心室重構的影響,并探討其可能機制。方法 50例心衰患者隨機分為rhBNP治療組與對照組,每組25例,隨訪3個月,治療前后分別測定LVEDD、EF及血清Ⅲ型前膠原(PCⅢ)、Ⅳ型膠原(CⅣ)、透明質酸(HA)和一氧化氮(NO)水平,并進行比較。結果 rhBNP治療3個月后,血清PCⅢ、CⅣ和HA水平較治療前顯著降低[(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水平較治療前顯著增加[(92.20±9.6)μmol/L vs (76.82±10.1)μmol/L,P<0.05],對照組各指標無明顯改變(P均>0.05)。結論 rhBNP治療能改善心衰癥狀,減輕心室重構,其機制可能與降低血清中膠原水平、增加NO濃度有關。
[關鍵詞] 腦鈉肽;心衰;膠原;透明質酸;一氧化氮
[中圖分類號] R541.6 [文獻標識碼] B [文章編號] 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)是各種心臟病發展到晚期的共同表現,是嚴重危害人民健康的疾病之一。近些年,心衰的研究取得了較大的進步[1-4],人重組腦鈉肽(rhBNP)治療心衰取得一定療效[5-9]。本研究旨在觀察rhBNP治療對心衰患者心室重構的影響并探討其機制。
1資料與方法
1.1一般資料
2010年1~6月收治的符合以下條件的心衰患者入選:①無rhBNP應用禁忌證;②能定期隨訪。共入選符合上述標準者50例,隨機分為rhBNP治療組及對照組,每組25例。
1.2治療方法
患者入選后,超聲測定左心室舒張末期內徑、EF值;早晨空腹抽血留樣測定血清PCⅢ、CⅣ、HA和NO水平,除心衰常規治療如利尿劑、洋地黃制劑、血管緊張素轉換酶抑制劑或血管緊張素Ⅱ受體拮抗劑之外,rhBNP組給予rhBNP治療(商品名:新活素,諾迪康生物制藥有限公司生產),用法:負荷量(1.5~2.0)μg/kg,維持量(0.0075~0.0100)μg/kg·min,連續靜滴24h。隨訪3個月后復查兩組各觀察指標。
1.3檢測方法
血清PCⅢ、CⅣ、HA測定采用放射免疫分析法,試劑盒由上海海研生物技術中心提供,NO測定采用比色法,試劑盒由南京聚力生物有限公司提供。
1.4統計學處理
采用SPSS15.0軟件包進行統計學分析,資料以均數±標準差(χ±s)表示,治療前后比較采用配對t檢驗,兩組間比較采用t檢驗,P<0.05為差異有統計學意義
2結果
2.1治療前兩組基本資料的比較(表1)
注:與對照組比較,*P>0.05
表1結果顯示治療前rhBNP組與對照組年齡、性別、EF值、PCⅢ、CⅣ、HA、NO水平及超聲左室舒張末期內徑等各項參數之間差異無統計學意義(t值分別為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治療對心衰患者左室舒張末期內徑、血清纖維化指標水平的影響(表2)
表2顯示rhBNP治療后3個月心衰患者EF明顯提高(t值為2.90,P<0.05),血清PCⅢ、CⅣ和HA水平顯著降低(t值分別為3.00、2.98、3.58,P均<0.05),NO水平增高(t值為4.23,P<0.05),超聲左室舒張末期內徑有減小趨勢,但差異無統計學意義(t值為0.44,P>0.05);而對照組3個月后各指標無明顯改變(t值分別為0.33、0.38、0.29、0.34、0.46,P均>0.05)。
3討論
心力衰竭(心衰)是各種心臟病發展到晚期的共同表現,是嚴重危害人民健康的疾病之一。近些年,心衰的研究取得了較大的進步,尤其是腦鈉肽的相關研究表明[10,11]:腦鈉肽不僅是診斷心衰及評價心衰治療效果的有效指標,而且已用于臨床治療,有限的資料表明近期臨床效果滿意[12-14],但其治療心衰的詳細機制尚未闡明,有關rhBNP對心衰患者心室重構的影響研究尚不多見。
我們的研究發現:rhBNP治療后3個月,治療組心衰患者心功能明顯改善,EF值增高,超聲左室舒張末期內徑有減少趨勢,但無統計學差異,同時患者血清中纖維化指標PCⅢ、CⅣ、HA水平降低,NO水平增加。對照組各指標有增加趨勢,但均無統計學差異。證明rhBNP治療可改善心衰患者近期預后,減輕心室重構,其機制可能與rhBNP改善內皮功能、促進一氧化氮釋放、抑制腎素-血管緊張素-醛固酮系統活性、降低血清中PCⅢ、CⅣ、HA水平、抑制炎癥、減少心肌纖維化有關,與國外研究結論一致[15-17]。但是我們的研究為單中心、小樣本研究,不同病因及合并疾病的心衰患者未詳細分組,為進一步闡明rhBNP對心衰患者遠期預后及心室重構的影響,尚需設計更多的多中心、大樣本的隨機、對照研究,為心衰的治療提供更多循證醫學的證據。
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(收稿日期:2011-05-26)
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