大鼠 Fn剪接异型体分布及皮肤损伤后表达研究

目的研究成年大鼠、新生幼鼠纤维连接蛋白剪接异型体 EⅢ A、 EⅢ B体内分布及皮肤切创、挫伤后表达情况 , 以期为法医学损伤经历时间研究探索新指标及选择阳性对照 . 方法组织匀浆后抽提总 RNA, 逆转录聚合酶链反应 ( RT- PCR) 技术扩增目标条带 . 结果 (1)正常皮肤 EⅢ A+ 、 EⅢ B+ 不表达 , 伤后 18h EⅢ A+ 位点高丰度表达 , EⅢ B+ 位点变化不明显 , 两种致伤方式表达结果差别不大 ; (2)成年大鼠各器官分布情况依次为脑、心、肝 . 结论 EⅢ A+ 可作为皮肤损伤研究的敏感指标 .

In vivo distribution and expression after skin injury of fibronectin splicing variants

OBJECTIVE: In order to develop new criteria and to select positive controls for forensic medicine, experiments on in vivo distribution and expression after skin wound of fibronectin splicing variants, EIIIA and EIIIB were studied. METHODS: Rat tissues were homogenized to extract total RNA which was then amplified by RT-PCR technique. RESULTS: (1) EIIIA+ and EIIIB+ of normal skin were not expressed, whereas EIIIA+ after 18 hours' injury was expressed abundantly. No obvious charge of EIIIB+ was detected. The differences between results of using two methods of injury were not significant. (2) The distribution of fibronectin variants in different adult organs were in the following order: brain > heart > liver. CONCLUSIONS: EIIIA+ may be used as a sensitive criterion for research of skin injury.