正文 扶正活血中藥對放射性肺損傷大鼠肺組織ET—1表達影響的實驗研究(1 / 3)

扶正活血中藥對放射性肺損傷大鼠肺組織ET—1表達影響的實驗研究

基礎醫學

作者:鄭海紅 甘梅富 魏科娜 翁壽向 徐铖 葛震

中醫科,浙江臨海 317000

[摘要] 目的 觀察放射性肺損傷大鼠肺組織內皮素-1(Endothelin-1,ET-1)的變化情況,探討扶正活血中藥在放射性肺損傷防治用途中的作用及其可能機製。 方法 56隻SD雌性大鼠隨機分為模型組(14隻)、前期幹預組(14隻)、後期短程幹預組(14隻)和後期長程幹預組(14隻)4組,通過單次大劑量胸部照射製成放射性肺損傷大鼠模型,並用扶正活血中藥進行幹預,於照射後3個月、6個月兩個時間點隨機處死各組大鼠7隻,取各組大鼠肺組織進行免疫組化檢測ET-1蛋白表達水平。 結果 各幹預組肺組織ET-1蛋白表達水平明顯低於模型組。 結論 血漿ET-1水平的變化情況在某種程度上能反映放射性肺損傷的嚴重程度,扶正活血中藥能抑製肺組織ET-1的表達,可能是扶正活血中藥治療放射性肺損傷的一個作用機製。

[關鍵詞] 放射性肺損傷;扶正活血中藥;內皮素-1

[中圖分類號] R289.9 [文獻標識碼] A [文章編號] 1673-9701(2015)29-0026-03

Experimental study of the effect of Fuzheng Huoxue recipe on the expression of ET-1 in rats with radiation-induced lung injury

ZHENG Haihong1 GAN Meifu1 WEI Ke'na1 WENG Shouxiang1 XU Cheng1 GE Zhen2

1.Department of Pathology, Taizhou Enze Medical Center, Taizhou Hospital of Zhejiang Province, Linhai 317000, China; 2.Department of traditional chinese medicine, Taizhou Hospital of Zhejiang Province, Linhai 317000, China

[Abstract] Objective To observe the effect of Fuzheng Huoxue recipe on the expression of ET-1 in rats with radiation-induced lung injury,and discuss the prevention and curative effect of Fuzheng Huoxue recipe and its possible action mechanism. Methods 56 S-D rats were randomly allocated into irradiation group(n=14), irradiation with early intervention group (n=14), irradiation with short post-intervention group (n=14), irradiation with long-term post-intervention group (n=14), All groups were irradiated all chest with a single large dose . 7 rats in all groups were put to death at the end of the 3th, 6th month after the irradiation, then immunohistochemistry was used to assayed the levels of ET-1 in lung. Results The protein expression of ET-1 in Fuzheng Huoxue recipe-treated groups were significantly lower than that of the model group. Conclusion ET-1 could reflect the degree of radiation lung injury. Fuzheng Huoxue recipe could degrade the levels of ET-1 in lung tissues significantly. It might be one of their mechanisms in treatment of radiation-induced lung injury.

[Key words] Radiation-induced lung injury;Fuzheng Huoxue recipe;ET-1

放射治療是治療胸部惡性腫瘤的主要手段之一,例如在肺癌、乳腺癌及食管癌等胸部腫瘤的放射治療中,部分肺組織可能或多或少受到一定劑量的射線照射因而引起不同程度的放射性損傷,依疾病進展可以分為早期的放射性肺炎和後期的肺纖維化[1-6]。目前尚未完全闡明放射性肺損傷產生的機製,目前多數研究表明放射性肺損傷與多種因子過度表達相關[7-11]。內皮素-1(Endothelin-1,ET-1)被看作為生物活性肽中的一種[12-14],在特發性肺間質纖維化的發病過程中起一定作用,關於ET-1在放射性肺損傷中作用的相關文獻尚不多見[15]。本實驗通過建立放射性肺損傷動物模型,采用免疫組織化學方法檢測ET-1在肺組織的表達,初步研究扶正活血中藥在放射性肺損傷防治用途中的作用及其可能機製。

1 材料與方法

1.1 材料來源

實驗動物:56隻健康成年清潔級SD雌性大鼠, 體重(200±10)g,購買於由溫州醫科大學實驗動物中心,於清潔動物房常規飼養3 d後,觀察無異常者方能入組實驗。ET-1多克隆兔抗體濃縮液購自博士德公司。