目的:研究放疗联合周剂量重组人血管内皮抑素(recombinant human endostatin,rh-Endostatin)对肺腺癌A549裸鼠移植瘤生长的抑制作用。方法:40只裸鼠A549细胞移植瘤模型随机分成4组:空白对照组、rh-Endostatin治疗组、放射治疗组和放疗联...目的:研究放疗联合周剂量重组人血管内皮抑素(recombinant human endostatin,rh-Endostatin)对肺腺癌A549裸鼠移植瘤生长的抑制作用。方法:40只裸鼠A549细胞移植瘤模型随机分成4组:空白对照组、rh-Endostatin治疗组、放射治疗组和放疗联合rh-Endostatin治疗组,观察并绘制肿瘤生长曲线图,计算肿瘤体积抑制率;肿瘤组织行常规HE病理学检查,免疫组织化学法检测肿瘤组织中微血管内皮CD31的表达及肿瘤微血管密度(microvessel density,MVD)的变化;采用免疫组织化学及Western印迹法检测血管内皮生长因子(vascular endothelial growth factor,VEGF)的表达;TUNEL法检测肿瘤细胞的凋亡。结果:治疗第8天起,放疗联合rh-Endostatin治疗组的肿瘤体积与对照组相比,差异有统计学意义(P<0.05)。15 d后,rh-Endostatin治疗组、放射治疗组和放疗联合rh-Endostatin治疗组小鼠的肿瘤体积的抑制率依次为68.35%、90.78%和106.56%;rh-Endostatin治疗组小鼠的MVD较放射治疗组下降明显(P<0.05);但rh-Endostatin治疗组与对照组、放疗联合rh-Endostati治疗组及放射治疗组相比,VEGF的改变差异均无统计学意义;放疗联合rh-Endostatin治疗组细胞凋亡明显。结论:放疗联合周剂量rh-Endostatin能抑制肿瘤的生长,较早诱导肿瘤退缩,可能与减少放射治疗后肿瘤血管再生及增加肿瘤细胞和内皮细胞的凋亡相关;各治疗组小鼠均未出现急性不良反应,因此该方法具有短疗程的优势,可用于临床推广。展开更多
To compare tumor necrosis factor receptor 1 (TNFR1) protein expression in wome n with unexplained early spontaneous abortion (UESA) and normal pregnancy. In a prospective study, 62 women with UESA and 60 with normal p...To compare tumor necrosis factor receptor 1 (TNFR1) protein expression in wome n with unexplained early spontaneous abortion (UESA) and normal pregnancy. In a prospective study, 62 women with UESA and 60 with normal pregnancy were studied. Decidual membrane TNFR1 was detected by flow cytometry and immunohistochemistry , and serum soluble TNFR1 were by ELISA. Statistical analyses of resulting data employed the student’s t test, the Fisher’s Exact, and the nonparametric Wilco xon test The percentage of membrane tumor necrosis factor receptor 1 (mTNFR1) po sitive decidual cells was 16.42±7.1 for women with UESA and 12.47±5.3 for wome n with normal pregnancy (P< 0.05). The number of mTNFR1 positive cells was more in decidual stromal and vessel endothelial cells in women with UESA, and serum s oluble tumor necrosis factor receptor 1 (sTNFR1) concentration was significantly higher than in women with normal pregnancy (554.56±126.7 pg/ml vs. 175.3±52.4 pg/ml; P< 0.001). The overexpression of TNFR1 may contribute to the development of ESA.展开更多
文摘To compare tumor necrosis factor receptor 1 (TNFR1) protein expression in wome n with unexplained early spontaneous abortion (UESA) and normal pregnancy. In a prospective study, 62 women with UESA and 60 with normal pregnancy were studied. Decidual membrane TNFR1 was detected by flow cytometry and immunohistochemistry , and serum soluble TNFR1 were by ELISA. Statistical analyses of resulting data employed the student’s t test, the Fisher’s Exact, and the nonparametric Wilco xon test The percentage of membrane tumor necrosis factor receptor 1 (mTNFR1) po sitive decidual cells was 16.42±7.1 for women with UESA and 12.47±5.3 for wome n with normal pregnancy (P< 0.05). The number of mTNFR1 positive cells was more in decidual stromal and vessel endothelial cells in women with UESA, and serum s oluble tumor necrosis factor receptor 1 (sTNFR1) concentration was significantly higher than in women with normal pregnancy (554.56±126.7 pg/ml vs. 175.3±52.4 pg/ml; P< 0.001). The overexpression of TNFR1 may contribute to the development of ESA.