论文部分内容阅读
目的至今，尚未见到采用免疫组化技术研究骨髓辐射损伤后干细胞因子受体（Ｃ－ｋｉｔ）表达及其在造血重建中的意义。方法经６０Ｃｏγ射线全身照射ＬＡＣＡ小鼠，于照射后４周内分批活杀动物，采用光镜、电镜及ＬＳＡＢ免疫组化方法，研究了辐射诱导的造血细胞凋亡及Ｃ－ｋｉｔ的表达及意义。结果全身照射ＬＡＣＡ小鼠时，５．５Ｇｙ为其亚致死剂量，此剂量照射小鼠可导致外周血白细胞及骨髓有核细胞数减少；骨髓明显损伤及损伤后重建现象；在照后１天内可使骨髓造血细胞发生凋亡；５．５Ｇｙ照射后６小时，Ｃ－ｋｉｔ蛋白于造血细胞浆内明显增多，呈强阳性；照后１０天，骨髓造血细胞增生、恢复，Ｃ－ｋｉｔ蛋白于造血细胞膜表达明显增多，呈强阳性。结论Ｃ－ｋｉｔ表达与造血功能重建有关，在早期造血功能重建中起重要调节作用。
Purpose To date, we have not yet seen the use of immunohistochemistry to study the expression of stem cell factor receptor (C-kit) after bone marrow irradiation and its significance in hematopoietic reconstitution. Methods LACA mice were irradiated with 60Coγ ray and killed by batch in 4 weeks after irradiation. The apoptosis of irradiated hematopoietic cells and the expression of C-kit were studied by light microscope, electron microscope and LSAB immunohistochemistry. significance. Results Whole body irradiation of LACA mice, 5.5Gy its sublethal dose, irradiation at this dose can lead to peripheral blood leukocytes and bone marrow decreased the number of nucleated cells; significant damage to the bone marrow and post-injury reconstruction; within 1 day after irradiation C-kit protein was significantly increased in hematopoietic cytoplasm at 6 hours after 5.5Gy irradiation. On the 10th day after irradiation, bone marrow hematopoietic cells proliferated and recovered. C-kit protein was found to hematopoietic Cell membrane expression was significantly increased, was strongly positive. Conclusions C-kit expression is related to hematopoietic reconstitution and plays an important role in early hematopoietic reconstitution.