Throughout the globe,diabetes mellitus（DM） is increasing in incidence with limited therapies presently available to prevent or resolve the significant complications of this disorder.DM impacts multiple organs and af...Throughout the globe,diabetes mellitus（DM） is increasing in incidence with limited therapies presently available to prevent or resolve the significant complications of this disorder.DM impacts multiple organs and affects all components of the central and peripheral nervous systems that can range from dementia to diabetic neuropathy.The mechanistic target of rapamycin（m TOR） is a promising agent for the development of novel regenerative strategies for the treatment of DM.m TOR and its related signaling pathways impact multiple metabolic parameters that include cellular metabolic homeostasis,insulin resistance,insulin secretion,stem cell proliferation and differentiation,pancreatic β-cell function,and programmed cell death with apoptosis and autophagy.m TOR is central element for the protein complexes m TOR Complex 1（m TORC1） and m TOR Complex 2（m TORC2） and is a critical component for a number of signaling pathways that involve phosphoinositide 3-kinase（PI 3-K）,protein kinase B（Akt）,AMP activated protein kinase（AMPK）,silent mating type information regulation 2 homolog 1（Saccharomyces cerevisiae）（SIRT1）,Wnt1 inducible signaling pathway protein 1（WISP1）,and growth factors.As a result,m TOR represents an exciting target to offer new clinical avenues for the treatment of DM and the complications of this disease.Future studies directed to elucidate the delicate balance m TOR holds over cellular metabolism and the impact of its broad signaling pathways should foster the translation of these targets into effective clinical regimens for DM.展开更多
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
基金supported by American Diabetes Association,American Heart Association,NIH NIEHS,NIH NIA,NIH NINDS,and NIH ARRA
文摘Throughout the globe,diabetes mellitus（DM） is increasing in incidence with limited therapies presently available to prevent or resolve the significant complications of this disorder.DM impacts multiple organs and affects all components of the central and peripheral nervous systems that can range from dementia to diabetic neuropathy.The mechanistic target of rapamycin（m TOR） is a promising agent for the development of novel regenerative strategies for the treatment of DM.m TOR and its related signaling pathways impact multiple metabolic parameters that include cellular metabolic homeostasis,insulin resistance,insulin secretion,stem cell proliferation and differentiation,pancreatic β-cell function,and programmed cell death with apoptosis and autophagy.m TOR is central element for the protein complexes m TOR Complex 1（m TORC1） and m TOR Complex 2（m TORC2） and is a critical component for a number of signaling pathways that involve phosphoinositide 3-kinase（PI 3-K）,protein kinase B（Akt）,AMP activated protein kinase（AMPK）,silent mating type information regulation 2 homolog 1（Saccharomyces cerevisiae）（SIRT1）,Wnt1 inducible signaling pathway protein 1（WISP1）,and growth factors.As a result,m TOR represents an exciting target to offer new clinical avenues for the treatment of DM and the complications of this disease.Future studies directed to elucidate the delicate balance m TOR holds over cellular metabolism and the impact of its broad signaling pathways should foster the translation of these targets into effective clinical regimens for DM.
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。
基金Specialized Research Fund for the Doctoral Program of Higher Education(SRFDP)sponsored by the Ministry of Education of China (20070246184)Opened Fund sponsored by Institute of Brain Science,Fudan University(2007)Basic-clinic Cross Research Fund sponsored by Shanghai Medical College,Fudan University(2007-09)~~
