目的:观察红芪多糖(HPS)对糖尿病肾病db/db小鼠Wnt/β-连环蛋白(β-catenin)信号通路的影响。方法:将50只db/db小鼠按体质量随机分为模型组、厄贝沙坦组、HPS高、中、低剂量组,每组10只;另取10只C57BL/6小鼠作为正常组。正常组和模型组...目的:观察红芪多糖(HPS)对糖尿病肾病db/db小鼠Wnt/β-连环蛋白(β-catenin)信号通路的影响。方法:将50只db/db小鼠按体质量随机分为模型组、厄贝沙坦组、HPS高、中、低剂量组,每组10只;另取10只C57BL/6小鼠作为正常组。正常组和模型组给予5 m L·kg^(-1)·d^(-1)蒸馏水,厄贝沙坦组给予22.75 mg·kg^(-1)·d^(-1)厄贝沙坦溶液,HPS高、中、低剂量组分别给予200、100、50 mg·kg^(-1)·d^(-1)HPS溶液。6组小鼠每日灌胃1次,连续给药12周。检测各组小鼠一般状态、血糖(GLU)、24 h尿蛋白(UTP)、血肌酐(SCr)、尿素氮(BUN),苏木素-伊红(HE)染色观察肾脏组织病理变化,蛋白免疫印迹法(Western blot)、实时荧光定量聚合酶链式反应(Real-time PCR)检测肾脏中Wnt1、β-catenin、糖原合成激酶-3β(GSK-3β)及磷酸化糖原合成激酶-3β(p-GSK-3β)的蛋白及m RNA的表达水平。结果:治疗12周后,与正常组比较,模型组小鼠一般状态较差且肾脏组织病理超微结构病变显著,其GLU、24 h UTP、SCr、BUN水平均升高(P<0.01);与模型组比较,HPS高、中剂量组小鼠一般状态及肾脏组织病理超微结构均得到一定程度改善,其GLU、24 h UTP、SCr、BUN水平均降低(P<0.05,P<0.01);与正常组比较,模型组Wnt1、β-catenin、GSK-3β及p-GSK-3βm RNA及蛋白表达水平均升高(P<0.01);与模型组比较,HPS高、中剂量组Wnt1、β-catenin、GSK-3β及p-GSK-3βm RNA及蛋白表达水平均明显降低(P<0.05,P<0.01)。结论:HPS可在一定程度上减轻糖尿病肾病的肾损伤,其机制可能与抑制Wnt/β-catenin信号通路激活有关。展开更多
Lamprophyres are widely spread over the Laowangzhai gold orefield in northern Mt. Ailao structure zone, Yunnan Province. Lamprophyres in the orefield are temporally and spatially related to gold mineralization. Lampro...Lamprophyres are widely spread over the Laowangzhai gold orefield in northern Mt. Ailao structure zone, Yunnan Province. Lamprophyres in the orefield are temporally and spatially related to gold mineralization. Lamprophyres in the orefield have anomalous Sr and Nd isotopic compositions, e.g. the 87Sr/ 86Sr ratios (0.706 665-0.707 960, the 87Sr/ 86Sr ratio of sample YLW-44 is 0.709 041) are higher than the modern value of the original mantle (0.704 5), the 143Nd/ 144Nd ratios (0.512 463-0.512 551) are lower than the modern value of the original mantle (0.512 638), and the calculated values ε Sr>0 (28.1-63.7) and ε Nd<0 (-1.34--3.07). The results of investigation indicate that lamprophyres in the Laowangzhai gold orefield with anomalous Sr and Nd isotopic compositions would not be produced as a result of contamination of the primary magma with the isotopic features of MORB by the crust materials high 87Sr/ 86Sr ratios and low 143Nd/ 144Nd ratios in the processes of rising or in the magma chamber, but the result of metasomatism of source mantle.展开更多
文摘目的:观察红芪多糖(HPS)对糖尿病肾病db/db小鼠Wnt/β-连环蛋白(β-catenin)信号通路的影响。方法:将50只db/db小鼠按体质量随机分为模型组、厄贝沙坦组、HPS高、中、低剂量组,每组10只;另取10只C57BL/6小鼠作为正常组。正常组和模型组给予5 m L·kg^(-1)·d^(-1)蒸馏水,厄贝沙坦组给予22.75 mg·kg^(-1)·d^(-1)厄贝沙坦溶液,HPS高、中、低剂量组分别给予200、100、50 mg·kg^(-1)·d^(-1)HPS溶液。6组小鼠每日灌胃1次,连续给药12周。检测各组小鼠一般状态、血糖(GLU)、24 h尿蛋白(UTP)、血肌酐(SCr)、尿素氮(BUN),苏木素-伊红(HE)染色观察肾脏组织病理变化,蛋白免疫印迹法(Western blot)、实时荧光定量聚合酶链式反应(Real-time PCR)检测肾脏中Wnt1、β-catenin、糖原合成激酶-3β(GSK-3β)及磷酸化糖原合成激酶-3β(p-GSK-3β)的蛋白及m RNA的表达水平。结果:治疗12周后,与正常组比较,模型组小鼠一般状态较差且肾脏组织病理超微结构病变显著,其GLU、24 h UTP、SCr、BUN水平均升高(P<0.01);与模型组比较,HPS高、中剂量组小鼠一般状态及肾脏组织病理超微结构均得到一定程度改善,其GLU、24 h UTP、SCr、BUN水平均降低(P<0.05,P<0.01);与正常组比较,模型组Wnt1、β-catenin、GSK-3β及p-GSK-3βm RNA及蛋白表达水平均升高(P<0.01);与模型组比较,HPS高、中剂量组Wnt1、β-catenin、GSK-3β及p-GSK-3βm RNA及蛋白表达水平均明显降低(P<0.05,P<0.01)。结论:HPS可在一定程度上减轻糖尿病肾病的肾损伤,其机制可能与抑制Wnt/β-catenin信号通路激活有关。
文摘Lamprophyres are widely spread over the Laowangzhai gold orefield in northern Mt. Ailao structure zone, Yunnan Province. Lamprophyres in the orefield are temporally and spatially related to gold mineralization. Lamprophyres in the orefield have anomalous Sr and Nd isotopic compositions, e.g. the 87Sr/ 86Sr ratios (0.706 665-0.707 960, the 87Sr/ 86Sr ratio of sample YLW-44 is 0.709 041) are higher than the modern value of the original mantle (0.704 5), the 143Nd/ 144Nd ratios (0.512 463-0.512 551) are lower than the modern value of the original mantle (0.512 638), and the calculated values ε Sr>0 (28.1-63.7) and ε Nd<0 (-1.34--3.07). The results of investigation indicate that lamprophyres in the Laowangzhai gold orefield with anomalous Sr and Nd isotopic compositions would not be produced as a result of contamination of the primary magma with the isotopic features of MORB by the crust materials high 87Sr/ 86Sr ratios and low 143Nd/ 144Nd ratios in the processes of rising or in the magma chamber, but the result of metasomatism of source mantle.
