目的比较相同剂量STZ处理时C57BL/6J和昆明小鼠1型糖尿病模型的成模率及稳定性,探究经济有效的糖尿病小鼠建模品系。方法健康雄性C57BL/6J和昆明小鼠分别随机分为3组(20只/组):正常对照组、150 m g/kg组(单次腹腔注射)、50mg/kg组(连续...目的比较相同剂量STZ处理时C57BL/6J和昆明小鼠1型糖尿病模型的成模率及稳定性,探究经济有效的糖尿病小鼠建模品系。方法健康雄性C57BL/6J和昆明小鼠分别随机分为3组(20只/组):正常对照组、150 m g/kg组(单次腹腔注射)、50mg/kg组(连续注射5 d)。末次注射STZ后每天测量小鼠摄食量和饮水量,每周测量小鼠空腹血糖及体重一次,连续观察4周。结果 2种建模方法均能使C57BL/6J和昆明小鼠表现出糖尿病的"三多一少"症状,且空腹血糖值比对照组显著增加(P<0.01),但2种小鼠的血糖差异无统计学意义。实验结束时,C57BL/6J和昆明小鼠的成模率没有差别,50 mg/kg组均为80%,150 mg/kg组均为65%。C57BL/6J小鼠的死亡率略低于昆明小鼠。结论相同剂量STZ处理下C57BL/6J和昆明小鼠1型糖尿病的成模率和模型稳定性基本一致,昆明小鼠是较C57BL/6J小鼠更为经济有效的建立糖尿病模型的小鼠品系。展开更多
This study examined the expression and distribution of angiopoietin-1/-2 （Ang-1/-2） in the endometrium of early pregnant mice. The expression of Ang-1/-2 was detected by immunohistochemical staining and in situ hybr...This study examined the expression and distribution of angiopoietin-1/-2 （Ang-1/-2） in the endometrium of early pregnant mice. The expression of Ang-1/-2 was detected by immunohistochemical staining and in situ hybridization respectively. Computerized image analysis system was used to measure the average optical intensity of Ang-1/-2 in endometria at different time points after gestation. Mice were randomly divided into 5 groups： control group, D2 group （2 days after pregnancy）, D4 group （4 days after pregnancy）, D6 group （6 days after pregnancy） and D8 group （8 days after pregnancy）, each containing 15 mice. The results showed that the expression of Ang-1 and Ang-2 was very different among 4 groups （P〈0.01）. Immunohistochemical staining revealed that Ang-1 was localized in the cytoplasma of stromal cells 2 days after pregnancy （day 2）, and in luminal epithelial cells on day 4. The protein of Ang-2 was mainly expressed in the cytoplasma of glandular epithelia and stromal cells. With gestation time, the positive reactions of Ang-1/-2 were stronger in the endometria of the pregnant mice （P〈0.01）. In situ hybridization showed Ang-I mRNA in stromal cells on day 2. Hybridization signal was localized in both stromal cells and vessel epithelial cells on day 4; Ang-2 mRNA was expressed in stromal cells and glandular epithelia on day 2; high mRNA levels appeared in stromal cells, glandular epithelia and vascular endothelia on day 4; an increasing in mRNA expression of Ang-1/-2 was observed on day 6 and day 8 （P〈0.01）. It is suggested that Ang-1/-2 may play an important role in the cross-talk between blastocyst and maternal endometrium during the process of embryo implantation.展开更多
文摘This study examined the expression and distribution of angiopoietin-1/-2 （Ang-1/-2） in the endometrium of early pregnant mice. The expression of Ang-1/-2 was detected by immunohistochemical staining and in situ hybridization respectively. Computerized image analysis system was used to measure the average optical intensity of Ang-1/-2 in endometria at different time points after gestation. Mice were randomly divided into 5 groups： control group, D2 group （2 days after pregnancy）, D4 group （4 days after pregnancy）, D6 group （6 days after pregnancy） and D8 group （8 days after pregnancy）, each containing 15 mice. The results showed that the expression of Ang-1 and Ang-2 was very different among 4 groups （P〈0.01）. Immunohistochemical staining revealed that Ang-1 was localized in the cytoplasma of stromal cells 2 days after pregnancy （day 2）, and in luminal epithelial cells on day 4. The protein of Ang-2 was mainly expressed in the cytoplasma of glandular epithelia and stromal cells. With gestation time, the positive reactions of Ang-1/-2 were stronger in the endometria of the pregnant mice （P〈0.01）. In situ hybridization showed Ang-I mRNA in stromal cells on day 2. Hybridization signal was localized in both stromal cells and vessel epithelial cells on day 4; Ang-2 mRNA was expressed in stromal cells and glandular epithelia on day 2; high mRNA levels appeared in stromal cells, glandular epithelia and vascular endothelia on day 4; an increasing in mRNA expression of Ang-1/-2 was observed on day 6 and day 8 （P〈0.01）. It is suggested that Ang-1/-2 may play an important role in the cross-talk between blastocyst and maternal endometrium during the process of embryo implantation.
