背景:骨髓间充质干细胞具有很大的增殖能力、多向分化潜能、向损伤组织定位修复的功能、低免疫原性和免疫调节作用,其可以用来治疗传统治疗方案难以治愈的疾病,具有广阔临床应用价值,成为细胞移植治疗的新热点。目的:观察局部注射的骨...背景:骨髓间充质干细胞具有很大的增殖能力、多向分化潜能、向损伤组织定位修复的功能、低免疫原性和免疫调节作用,其可以用来治疗传统治疗方案难以治愈的疾病,具有广阔临床应用价值,成为细胞移植治疗的新热点。目的:观察局部注射的骨髓间充质干细胞在缺血性结肠吻合模型大鼠肠黏膜的定植情况及对结肠吻合口愈合的影响。方法:将40只雌性SD大鼠随机分为4组:对照4 d组和对照7 d组,行左侧结肠缺血性吻合后肠黏膜下局部注射0.5 m L胎牛血清,骨髓间充质干细胞移植4 d组和骨髓间充质干细胞移植7 d组,行左侧结肠缺血性吻合后,取培养至第3代的骨髓间充质干细胞(0.5 m L,1×107个细胞)直接在肠黏膜下注射移植。分别测定各组大鼠吻合口爆破压,取吻合口处肠管行羟脯氨酸含量测定,苏木精-伊红染色及Masson染色行组织病理学评分,Y染色体原位杂交检测供鼠来源的细胞迁徙及定植情况。结果与结论:骨髓间充质干细胞移植组吻合口爆破压、羟脯氨酸含量较对照组明显增高,组织病理学评分提示除上皮形成及炎症指标外,黏膜坏死、胶原蛋白沉积量、成纤维细胞活性及新生血管形成指标骨髓间充质干细胞移植组优于对照组。结果表明移植同种异体大鼠骨髓间充质干细胞可在受体缺血性结肠吻合模型肠道内定植,并可加速结肠吻合口的愈合,其发挥疗效主要是通过旁分泌的形式促进机体内源性修复,而骨髓间充质干细胞直接分化为肠黏膜上皮细胞作用较小。展开更多
Based on the deformation characteristics of the roadways driven along goaf in fully mechanized top coal caving faces, the author considers that it is the key to ensure the stability of surrounding rocks of roadway dri...Based on the deformation characteristics of the roadways driven along goaf in fully mechanized top coal caving faces, the author considers that it is the key to ensure the stability of surrounding rocks of roadway driven along goaf to control the deformation during the period affected by mining. Considering the characteristics of the roadway layout in fully mechanized top coal caving faces, a technical scheme of destressing is put forward and the destressing effect is analyzed by using the software of Universal Distinct Element Code 3 0(UDEC 3 0).展开更多
文摘背景:骨髓间充质干细胞具有很大的增殖能力、多向分化潜能、向损伤组织定位修复的功能、低免疫原性和免疫调节作用,其可以用来治疗传统治疗方案难以治愈的疾病,具有广阔临床应用价值,成为细胞移植治疗的新热点。目的:观察局部注射的骨髓间充质干细胞在缺血性结肠吻合模型大鼠肠黏膜的定植情况及对结肠吻合口愈合的影响。方法:将40只雌性SD大鼠随机分为4组:对照4 d组和对照7 d组,行左侧结肠缺血性吻合后肠黏膜下局部注射0.5 m L胎牛血清,骨髓间充质干细胞移植4 d组和骨髓间充质干细胞移植7 d组,行左侧结肠缺血性吻合后,取培养至第3代的骨髓间充质干细胞(0.5 m L,1×107个细胞)直接在肠黏膜下注射移植。分别测定各组大鼠吻合口爆破压,取吻合口处肠管行羟脯氨酸含量测定,苏木精-伊红染色及Masson染色行组织病理学评分,Y染色体原位杂交检测供鼠来源的细胞迁徙及定植情况。结果与结论:骨髓间充质干细胞移植组吻合口爆破压、羟脯氨酸含量较对照组明显增高,组织病理学评分提示除上皮形成及炎症指标外,黏膜坏死、胶原蛋白沉积量、成纤维细胞活性及新生血管形成指标骨髓间充质干细胞移植组优于对照组。结果表明移植同种异体大鼠骨髓间充质干细胞可在受体缺血性结肠吻合模型肠道内定植,并可加速结肠吻合口的愈合,其发挥疗效主要是通过旁分泌的形式促进机体内源性修复,而骨髓间充质干细胞直接分化为肠黏膜上皮细胞作用较小。
文摘Based on the deformation characteristics of the roadways driven along goaf in fully mechanized top coal caving faces, the author considers that it is the key to ensure the stability of surrounding rocks of roadway driven along goaf to control the deformation during the period affected by mining. Considering the characteristics of the roadway layout in fully mechanized top coal caving faces, a technical scheme of destressing is put forward and the destressing effect is analyzed by using the software of Universal Distinct Element Code 3 0(UDEC 3 0).
