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作 者:陈莉[1,2] 王迎春[1,2] 富博[1,2] 杨鸿武[1,2] 汤天趵[1,2]
机构地区:[1]沈阳市劳动卫生职业病研究所 [2]中国医科大学科技开发公司
出 处:《中国工业医学杂志》1998年第2期83-85,共3页Chinese Journal of Industrial Medicine
摘 要:目的探讨尘肺发病机理。方法采用SDS-聚丙烯酰胺凝胶电泳(SDS-PAGE)技术对染石英(25mg/只)或石棉尘(5mg/只)大鼠支气管肺泡灌洗液(BALF)进行了测定,并在光镜下观察天狼星红染色肺组织Ⅰ、Ⅲ型胶原分布情况。结果染石英不同时间大鼠BALF中存在5条分子量分别为90,66,60,25,14KD的蛋白质条带。染石棉大鼠BALF仅有一条带,分子量为66KD。染石英两周时,大鼠肺组织细胞纤维性结节中即有少量Ⅰ型胶原沉积,2个月时Ⅰ型胶原明显增加、粗大。石棉组3个月时肺间质中有Ⅰ型胶原存在。两组均未见明显Ⅲ型胶原。n order to explore the pathogenesis of pneumoconiosis,SDSpolyacrylamide gel electrophoresis(SDSPAGE)was used to analyse the changes of bronchoalveolar lavage fluid(BALF)in male rats,at 05,1,2,3,5 months after intratracheal injection of quartz(25mg/rat)or Canada UICC chrysotile(5 mg/rat),and the lung histopathology with picrosirius stain were examined.The results showed that there were five protein bands in BALF of quartz exposed rats and their molecular weights were 90,66,60,25,14 KD,respectively;only oneband with 66KD molecular weight were found in BALF of chrysotile exposed rats.The collagens I deposited in pulmonary fibrotic nodes in quartz exposed rats could be seen in two week exposure,then gradually increased.Collagens I were only found in thickened lung interstitial tissues of chrysotile exposed rats after 3 month exposure,no collagens Ⅲ were found in two groups.The conclusion seems that the existing of proteins with different molecular weight in BALF of quartz exposed rats might play a promoting role in the development of silicosis.
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