三氧化二砷对博莱霉素致大鼠肺纤维化的影响及其作用机制  被引量:12

Effect of arsenic trioxide on bleomycin-induced pulmonary fibrosis in rats

在线阅读下载全文

作  者:陈宝[1] 李惠萍[1] 范峰[1] 姜寒水[1] 王克俭[1] 张容轩[2] 郑卉[2] 

机构地区:[1]同济大学附属上海市肺科医院呼吸科,上海200433 [2]同济大学附属上海市肺科医院病理科,上海200433

出  处:《中国病理生理杂志》2010年第5期858-864,共7页Chinese Journal of Pathophysiology

基  金:国家自然科学基金资助项目(No.30671996;No.30971323);上海市优秀学科带头人计划(No.08XD14034);上海市科委科研基金资助项目(No.064107050;No.08411961000;No.0852nm05600;No.09411951500)

摘  要:目的:观察三氧化二砷对博莱霉素致大鼠肺纤维化的影响及可能的作用机制。方法:SD大鼠气管内滴注博莱霉素诱导肺纤维化,腹腔内分别注射三氧化二砷(治疗组)、地塞米松(激素组)、生理盐水(模型组)进行干预。各组动物再按造模后开始干预的时间不同分为14d和28d开始干预2个亚组,每个亚组再按观察时间不同分为14d、28d和56d3个观察组。观察大鼠中位生存时间、肺组织羟脯氨酸含量、肺泡炎和肺纤维化程度(HE染色)、肺组织胶原定量分析(Masson染色)等指标来评价药物干预效果,并采用脱氧核糖核苷酸末端转移酶介导的缺口末端标记法(TUNEL法)检测肺组织凋亡指数。同时对肺组织转化生长因子-β1(TGF-β1)、干扰素-γ(IFN-γ)、基质金属蛋白酶-9(MMP-9)、金属蛋白酶组织抑制物-1(TIMP-1)免疫组化染色结果进行定量分析。结果:(1)生存时间观察:造模后14d开始干预的模型组、治疗组和激素组的中位生存时间分别为30d、57d和19d(P<0.01);而造模后28d开始干预的各组的中位生存时间为40d、58d和34d(P<0.05)。(2)肺纤维化的比较:各治疗组大鼠的羟脯氨酸含量与模型组相比均有下降趋势。各治疗组的肺泡炎和肺纤维化程度均轻于模型组。与模型组相比,各治疗组的胶原面积均小于模型组。(3)肺组织凋亡指数的比较:与模型组相比,14d开始干预并观察14d、28d组和28d开始干预并观察14d组的治疗组大鼠凋亡指数明显升高。(4)14d开始干预的各组的细胞因子比较:各治疗组的肺组织中转化生长因子-β1(TGF-β1)免疫组化染色的平均光密度均低于相应模型组。治疗组中观察28d和56d小组的肺组织中干扰素-γ(IFN-γ)免疫组化染色的平均光密度均高于模型组。各治疗组的肺组织中基质金属蛋白酶-9(MMP-9)免疫组化染色平均光密度与模型组区别不明显。与模型组比较,各治疗组的肺组织中金属蛋白酶组织�AIM:To observe the effect of arsenic trioxide (ATO) on bleomycin-induced pulmonary fibrosis in rats. METHODS:Pulmonary fibrosis was induced in Sprague-Dawley (SD) rats by intratracheal instillation of bleomycin (BLM). The rats in ATO treatment group,steroid treatment group and model group were intraperitoneally injected with ATO,dexamethasone or normal saline (NS),respectively,while the control rats received NS both intratracheally and intraperitoneally. The effects of ATO were evaluated by analyzing the median survival time,hydroxyproline level in the lung,semiquantitative grading of alveolitis and pulmonary fibrosis,and quantitative analysis of the collagen in lung tissue (Masson's trichrome staining). Apoptosis index (AI) of the lung was detected by using the terminal transferase dUTP-digoxygenin nick endlabeling (TUNEL) method. The results of immunohistochemical staining for some cytokines were quantitatively analyzed. RESULTS:ATO (1) prolonged the median survival time of rats with BLM-induced pulmonary fibrosis at some extent; (2) attenuated the alveolitis and pulmonary fibrosis,reduced hydroxyproline level and collagen deposition in the lung tissue; (3) increased the AI of lung tissue at a certain phase; and decreased the levels of transforming growth factor-β1(TGF-β1) and tissue inhibitor of metalloproteinase-1 (TIMP-1),increased the content of in-terferon-γ (IFN-γ),but did not influence the concentration of matrix metalloproteinase-9 (MMP-9) significantly. CONCLUSION:ATO might attenuate BLM-induced pulmonary fibrosis in rats via increasing the AI in the lung tissue.

关 键 词:三氧化二砷 肺纤维化 博莱霉素 细胞凋亡 细胞因子类 

分 类 号:R332.3[医药卫生—人体生理学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象