摘要
目的 研究表皮生长因子 (EGF)、转化生长因子 α(TGF α)及表皮生长因子受体 (EGFR)在大鼠胃溃疡自愈过程中的表达及其可能的生物学意义。方法 采用乙酸注射制作溃疡动物模型 ,应用免疫组织化学方法动态研究EGF、TGF α及EGFR的定位与表达特征。结果 正常大鼠胃黏膜EGF、TGF α及EGFR均为弱阳性表达 ,EGF、TGF α定位于细胞质 ,EGFR在胞质及胞膜均有表达 ,但以后者为主 ,三者的表达部位有重叠。EGF主要集中胃腺颈部 ,TGF α、EGFR在胃腺颈部、基底部都有表达。阳性表达以胃黏膜的壁细胞、颈部细胞为主。取材组在溃疡自愈过程中EGF、TGF α及EGFR的表达发生了明显的规律性的变化 ,溃疡旁组织表达比正常组织高 ,坏死组织无表达 ,肉芽组织、瘢痕组织少有表达 ,溃疡的早期表达不明显 ,溃疡的愈合期及瘢痕期表达明显。结论 ①在正常情况下TGF α/EGFR自分泌系统对维护大鼠黏膜完整性可能起主导作用 ;②溃疡在自愈过程中EGF/EGFR和TGF α/EGFR自分泌系统可能对细胞增殖、分化。
AIM To study the epidermal growth factor (EGF) and transforming growth factor α (TGF α)and the epidermal growth factor receptor(EGFR)during the course of rats gastric ulcer natural cure expressing and its possible biology meaning. METHODS We injected acetic acid to make the ulcer animal model, location expression characteristic of EGF and TGF α and EGFR were studied by immunohistochemistry. RESULTS The normal rats stomach mucosa EGF,TGF α and EGFR all expressed weakly at masculine. EGF and TGF α was located at cytoplasm,and EGFR expressesed at cytoplasm and cell membrane and the expression position of the three ovrlopped with each other. EGF concentrated mainly on the cervical part of gastric gland, and TGF α and EGFR, on the cervical and base parts of the gastric gland. Positive 9 expression cells were primarily parietal[FQ(11?46,X-WZ] and neck cells of the stamook muc. For materials taken during the course of ulcer natural recovery, regular ohanges were observed in TGF, TGF α and EGFR expression. Higher expression was found in ulcer tissunes than in normal tissues, while the expression was not detectable in necrotic tissues and rarely detectable in granlation and scar tissnes. The expression became apparant only during healing and scar stages of ulcer but not in early stage. CONCLUSION ①TGF α/EGFR autocrine system probably plays a leading role in maintaining rats mucosa completeness under the normal circumstances; ②EGF/EGFR and TGF α/EGFR autocrine system may have important effect on the differentiation, hyperplasia, moving of cell and restraining the gastric acidity.
出处
《中国药理学通报》
CAS
CSCD
北大核心
2003年第10期1185-1188,共4页
Chinese Pharmacological Bulletin
基金
河北省教育厅资助课题 No 2 0 0 3 12 0
关键词
胃溃疡
免疫组织化学
表皮生长因子
转化生长因子
受体
gastric ulcer
immunohistochemistry
epidermal growth factor
transforming growth factor
receptor
