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白花丹素介导sirt1-FOXO1通路对糖尿病肾病大鼠氧化应激损伤的影响 被引量:7
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作者 高晓卫 刘迎迎 +1 位作者 于潇 丁怡 《中国老年学杂志》 CAS 北大核心 2024年第1期170-174,共5页
目的探究白花丹素通过沉默信息调节因子2相关酶(sirt)1-叉头框蛋白(FOX)O1通路对糖尿病肾病(DN)大鼠氧化应激损伤的影响。方法120只SD大鼠随机分为对照组、DN组、白花丹素低剂量组、白花丹素高剂量组、EX-527组(sirt1抑制剂,5 mg/kg)、... 目的探究白花丹素通过沉默信息调节因子2相关酶(sirt)1-叉头框蛋白(FOX)O1通路对糖尿病肾病(DN)大鼠氧化应激损伤的影响。方法120只SD大鼠随机分为对照组、DN组、白花丹素低剂量组、白花丹素高剂量组、EX-527组(sirt1抑制剂,5 mg/kg)、白花丹素高剂量+EX-527组,每组20只。检测大鼠24 h尿蛋白、空腹血糖(FBG)、血肌酐(SCr)、血β2微球蛋白(β2-MG)及肾组织匀浆中超氧化物歧化酶(SOD)、丙二醛(MDA)、过氧化氢酶(CAT)、白细胞介素(IL)-1β、IL-6水平;测定大鼠左肾指数;过碘酸雪夫(PAS)染色观测肾脏病理变化;TUNEL法检测肾组织细胞凋亡;Western印迹法检测sirt1-FOXO1通路相关蛋白表达。结果与对照组相比,DN组24 h尿蛋白、FBG、Scr、β2-MG水平、左肾指数、MDA、IL-1β、IL-6水平均显著升高,肾组织匀浆SOD、CAT水平、肾组织sirt1、FOXO1蛋白均显著降低(P<0.05)。与DN组相比,白花丹素低、高剂量组24 h尿蛋白、FBG、Scr、β2-MG水平、左肾指数、MDA、IL-1β、IL-6水平均显著降低,肾组织匀浆SOD、CAT水平、肾组织sirt1、FOXO1蛋白显著升高(P<0.05);EX-527组24 h尿蛋白、FBG、Scr、β2-MG水平、左肾指数、MDA、IL-1β、IL-6水平均显著升高,肾组织匀浆SOD、CAT水平、肾组织sirt1、FOXO1蛋白均显著降低(P<0.05);EX-527可部分削弱白花丹素高剂量对DN大鼠氧化应激损伤的缓解作用。结论白花丹素可能通过激活sirt1-FOXO1通路,缓解DN大鼠氧化应激损伤。 展开更多
关键词 白花丹素 沉默信息调节因子2相关酶(sirt)1-叉头框蛋白(fox)o1通路 糖尿病肾病 氧化应激
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六味地黄丸通过PI3K/Akt/FoxO3a通路调控自噬对SAMP8小鼠记忆功能的影响 被引量:20
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作者 宋军营 丁蕊 +4 位作者 李俊霖 蔡菊 袁永 贾亚泉 张振强 《中国实验方剂学杂志》 CAS CSCD 北大核心 2022年第17期1-8,共8页
目的:探讨六味地黄丸通过磷脂酰肌醇3-激酶(PI3K)/蛋白激酶B(Akt)/叉头框转录因子O3a(FoxO3a)通路调控自噬对快速老化小鼠8型(SAMP8)小鼠记忆功能的影响。方法:6月龄SPF级抗快速老化亚系小鼠(SAMR1)雄性小鼠6只设为正常组,6月龄SPF级SA... 目的:探讨六味地黄丸通过磷脂酰肌醇3-激酶(PI3K)/蛋白激酶B(Akt)/叉头框转录因子O3a(FoxO3a)通路调控自噬对快速老化小鼠8型(SAMP8)小鼠记忆功能的影响。方法:6月龄SPF级抗快速老化亚系小鼠(SAMR1)雄性小鼠6只设为正常组,6月龄SPF级SAMP8雄性小鼠24只随机均分为模型组、多奈哌齐组(0.747 mg·kg^(-1))、六味地黄丸高、低剂量组(2.700、1.350 g·kg^(-1)),灌胃给药2个月。Morris水迷宫法检测各组小鼠学习和记忆能力;尼氏染色观察小鼠皮层、海马神经元;免疫组化(IHC)检测皮层、海马微管相关蛋白1轻链3B(LC3B)阳性表达;蛋白免疫印迹法(Western blot)检测各组小鼠皮层自噬关键分子酵母ATG6同系物(Beclin1)、B细胞淋巴瘤-2(Bcl-2)、自噬相关基因5(ATG5)、胱天蛋白酶-3(Caspase-3)、Caspase-9、Akt、p-Akt、FoxO3a、p-FoxO3a的蛋白表达水平。结果:与正常组小鼠比较,模型组小鼠逃避潜伏期明显延长(P<0.05,P<0.01),穿越平台次数、目标象限停留时间显著减少(P<0.01);皮层、海马神经细胞数量明显减少、体积缩小,分布疏散,LC3B阳性表达显著增多(P<0.01);皮层Beclin1、ATG5表达显著升高(P<0.01),Bcl-2表达水平降低(P<0.01),Caspase-3、Caspase-9表达水平显著升高(P<0.01),p-Akt/Akt、p-FoxO3a/FoxO3a表达水平显著降低(P<0.01)。与模型组比较,多奈哌齐组及六味地黄丸高、低剂量组小,3 d逃避潜伏期明显缩短(P<0.05,P<0.01);穿越平台次数显著增加(P<0.01);目标象限停留时间显著增加(P<0.01);多奈哌齐组皮层海马神经元神经细胞数量增多,六味地黄丸高、低剂量组小鼠神经元数目及尼氏体明显增加且分布致密,细胞损伤程度较低;多奈哌齐组及六味地黄丸高、低剂量组皮层、海马LC3B阳性表达显著降低(P<0.01);六味地黄丸高、低剂量组Beclin1表达显著降低(P<0.01),多奈哌齐组和六味地黄丸低剂量组ATG5表达显著降低(P<0.01),多奈哌齐组及六味地黄丸高、低剂量组皮层Bcl-2表达水平显著升高(P<0.01),Caspase-3表达水平显著降低(P<0.01),Caspase-9表达明显降低(P<0.05,P<0.01),p-Akt/Akt、p-FoxO3a/FoxO3a表达水平显著升高(P<0.01)。结论:六味地黄丸有效改善了快速老化SAMP8 AD模型小鼠的学习记忆能力,保护神经元,其机制可能与调控PI3K/Akt/FoxO3a信号通路,下调自噬相关因子ATG5、Beclin1和LC3B表达和减少凋亡有关。 展开更多
关键词 六味地黄丸 阿尔茨海默病 自噬 凋亡 叉头框转录因子o3a(fox o3a)
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白皮杉醇对糖尿病肾病肾小管间质纤维化、肾小管凋亡及FoxO1表达的影响 被引量:1
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作者 崔璨 宋玮 +1 位作者 田华 侯文雁 《中国老年学杂志》 CAS 北大核心 2023年第16期4005-4008,共4页
目的探究白皮杉醇(Pic)对糖尿病肾病(DN)肾小管间质纤维化、肾小管凋亡的影响及潜在机制。方法选择雄性C57BL/6小鼠40只,随机分为对照(Control)组、模型(Model)组、Pic低剂量(Low-Pic)组、Pic中剂量(Mid-Pic)组及Pic高剂量(High-Pic)组... 目的探究白皮杉醇(Pic)对糖尿病肾病(DN)肾小管间质纤维化、肾小管凋亡的影响及潜在机制。方法选择雄性C57BL/6小鼠40只,随机分为对照(Control)组、模型(Model)组、Pic低剂量(Low-Pic)组、Pic中剂量(Mid-Pic)组及Pic高剂量(High-Pic)组各8只。除Control组外,其他组进行高糖高脂饮食,并配合链脲佐菌素(STZ)腹腔注射诱导构建DN小鼠模型。Low-Pic、Mid-Pic及High-Pic组DN造模成功后,分别给予Pic 10、20及40 mg/kg灌胃2 w,Control组及Model组给予等量生理盐水灌胃。留取血清及肾脏组织,检测小鼠空腹血糖、血清肌酐、尿素氮及24 h尿总蛋白;采用Western印迹测定肾脏组织蛋白表达。体外培养人肾小管上皮细胞株(HK)-2,随机分为Control组、Model组、Low-Pic组、Mid-Pic组及High-Pic组。除Control组外,使用30 mmol/L D-葡萄糖对其他组处理72 h,对Low-Pic组、Mid-Pic组及High-Pic组分别给予Pic 10、20及40μmol/L处理24 h,采用Western印迹测定细胞蛋白表达。结果Model组空腹血糖、血清肌酐、尿素氮及24 h尿蛋白总量显著高于Control组,Low-Pic、Mid-Pic、High-Pic组可呈显著剂量依赖性逆转(均P<0.05)。在HK-2细胞系中,与Control组相比,Model组细胞纤维化相关蛋白E-钙黏附蛋白(cadherin)表达降低,α-SMA表达升高,促凋亡相关蛋白Cleaved Caspase-3及Bax表达升高,差异均有统计学意义(P<0.05),而Low-Pic、Mid-Pic、High-Pic组可逆转上述变化,且呈显著剂量依赖性(均P<0.05)。此外,Pic各组沉默调节蛋白(Sirt)1和磷酸化叉头框蛋白(Fox)O1蛋白表达水平均显著高于Model组,且随着Pic浓度升高,效果越明显(均P<0.05)。结论Pic可减轻DN引起的肾功能损伤,并抑制肾小管纤维化及凋亡,其发挥保护性作用可能是通过调节Sirt1/FoxO1活化实现。 展开更多
关键词 白皮杉醇(Pic) 糖尿病肾病(DN) 肾小管间质纤维化 肾小管凋亡 叉头框蛋白(fox)o1
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Novel nervous and multi-system regenerative therapeutic strategies for diabetes mellitus with mTOR 被引量:14
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作者 Kenneth Maiese 《Neural Regeneration Research》 SCIE CAS CSCD 2016年第3期372-385,共14页
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
关键词 Akt AMP activated protein kinase(AMPK) apoptosis Alzheimer’s disease autophagy β-cell cancer cardiovascular disease caspase CCN family diabetes mellitus epidermal growth factor erythropoietin fibroblast growth factor forkhead transcription factors fox o FRAP1 hamartin(tuberous sclerosis 1)/tuberin(tuberous sclerosis 2)(TSC1/TSC2) insulin mechanistic target of rapamycin(mToR) m ToR Complex 1(m T oRC1) m ToR Complex 2(m ToRC2) nicotinamide nicotinamide adenine dinucleotide(NAD+) non-communicable diseases oxidative stress phosphoinositide 3-kinase(PI 3-K) programmed cell death silent mating type information regulation 2 homolog 1(Saccharomyces cerevisiae)(SIRT1) sirtuin stem cells wingless Wnt Wnt1 inducible signaling pathway protein 1(WISP1)
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SIRT1 and stem cells: In the forefront with cardiovascular disease, neurodegeneration and cancer 被引量:11
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作者 Kenneth Maiese 《World Journal of Stem Cells》 SCIE CAS 2015年第2期235-242,共8页
Cardiovascular disease, nervous system disorders, and cancer in association with other diseases such as diabetes mellitus result in greater than sixty percent of the global annual deaths. These noncommunicable disease... Cardiovascular disease, nervous system disorders, and cancer in association with other diseases such as diabetes mellitus result in greater than sixty percent of the global annual deaths. These noncommunicable diseases also affect at least one-third of the population in low and middle-income countries and lead to hypertension, elevated cholesterol, malignancy, and neurodegenerative disorders such as Alzheimer's disease and stroke. With the climbing lifespan of the world's population, increased prevalence of these disorders is expected requiring the development of new therapeutic strategies against these disabling disease entities. Targeting stem cellproliferation for cardiac disease, vascular disorders, cancer, and neurodegenerative disorders is receiving great enthusiasm, especially those that focus upon SIRT1, a mammalian homologue of the yeast silent information regulator-2. Modulation of the cellular activity of SIRT1 can involve oversight by nicotinamide/nicotinic acid mononucleotide adenylyltransferase, mammalian forkhead transcription factors, mechanistic of rapamycin pathways, and cysteine-rich protein 61, connective tissue growth factor, and nephroblastoma over-expressed gene family members that can impact cytoprotective outcomes. Ultimately, the ability of SIRT1 to control the programmed cell death pathways of apoptosis and autophagy can determine not only cardiac, vascular, and neuronal stem cell development and longevity, but also the onset of tumorigenesis and the resistance against chemotherapy. SIRT1 therefore has a critical role and holds exciting prospects for new therapeutic strategies that can offer reparative processes for cardiac, vascular, and nervous system degenerative disorders as well as targeted control of aberrant cell growth during cancer. 展开更多
关键词 foxo Mechanistic of rapamycin Apoptosis Autophagy Cardiovascular CYSTEINE-RICH protein 61 connective tissue growth factor and nephroblastomaover-expressed gene NEURoDEGENERATIoN Progenitorstem cells SIRT1 CANCER
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