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氟暴露对大鼠肾脏损伤及SIRT3-FOXO3a-PINK1/PARKIN通路的影响
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作者 宋居会 何文雯 +5 位作者 李瑞超 罗蕴胭 张婷 王婵娟 董阳婷 何燕 《中华地方病学杂志》 CAS 北大核心 2024年第7期528-535,共8页
目的探讨氟暴露对大鼠肾脏损伤及沉默信息调节因子3(SIRT3)-叉头蛋白O3a(FOXO3a)-张力蛋白同源物诱导的假定激酶1(PINK1)/E3泛素连接酶(PARKIN)通路的影响。方法选取4周龄SD大鼠(清洁级,体质量100~150 g)24只,按随机数字表法分为3组:对... 目的探讨氟暴露对大鼠肾脏损伤及沉默信息调节因子3(SIRT3)-叉头蛋白O3a(FOXO3a)-张力蛋白同源物诱导的假定激酶1(PINK1)/E3泛素连接酶(PARKIN)通路的影响。方法选取4周龄SD大鼠(清洁级,体质量100~150 g)24只,按随机数字表法分为3组:对照组、低氟组、高氟组,每组8只(雌雄各半)。对照组自由饮用自来水(氟离子浓度<0.5 mg/L),低、高氟组分别自由饮用自来水和氟化钠配制的溶液(氟离子浓度分别为5.0、50.0 mg/L),周期为180 d。实验结束后,观察并记录大鼠氟斑牙形成情况,采集大鼠股骨、尿液、血液,检测骨氟、尿氟、血氟含量,并检测肾脏功能相关指标(血清尿酸、肌酐、尿素氮含量);光镜下观察苏木素-伊红(HE)染色肾组织形态学变化;实时荧光定量PCR(qRT-PCR)法和蛋白质印迹法分别检测肾脏SIRT3、FOXO3a、PINK1、PARKIN、微管相关蛋白1轻链3(LC3)、自噬受体蛋白(P62)mRNA和蛋白表达水平。结果低、高氟组大鼠分别有7、1只检出Ⅰ度氟斑牙,0、7只检出Ⅱ度氟斑牙。与对照组比较,低、高氟组大鼠骨氟(μg/g:1.18±0.06、2.16±0.07比0.52±0.05)、尿氟(mg/L:4.43±0.11、7.46±0.09比2.58±0.14)、血氟含量(μg/ml:0.77±0.06、1.68±0.10比0.52±0.08),血清尿酸(μg/ml:61.01±4.17、103.92±5.43比28.68±2.91)、肌酐(μg/ml:74.82±9.61、132.05±5.35比22.38±4.11)、尿素氮含量(μg/ml:13.36±1.27、14.55±0.34比0.29±0.07)均较高(均P<0.05)。光镜下,对照组肾组织表现为肾小管和肾小球细胞排列紧密且整齐,细胞形态规则,轮廓完整清晰;低氟组与对照组相似,未见明显异常;高氟组可见肾小球结构异常,出现萎缩现象,部分区域肾小管表现为上皮细胞水肿和细胞间界限不清。qRT-PCR检测结果显示,与对照组比较,低、高氟组SIRT3(0.82±0.03、0.58±0.02比1.00±0.08)和P62 mRNA表达水平(0.75±0.07、0.28±0.09比1.00±0.07)均较低(均P<0.05);FOXO3a(1.35±0.04、3.01±0.23比1.00±0.08),PINK1(1.58±0.09、3.28±0.09比1.00±0.07),PARKIN(1.51±0.04、1.67±0.10比1.00±0.05)和LC3 mRNA表达水平(1.74±0.07、2.38±0.18比1.00±0.08)均较高(均P<0.05)。蛋白质印迹法检测结果显示,与对照组比较,低、高氟组SIRT3(0.91±0.01、0.55±0.03比1.00±0.01)和P62蛋白表达水平(0.94±0.27、0.66±0.38比1.00±0.19)均较低(均P<0.05);FOXO3a(1.14±0.03、1.22±0.05比1.00±0.02),PINK1(1.46±0.03、1.56±0.03比1.00±0.05),PARKIN(1.98±0.02、2.33±0.11比1.00±0.06)和LC3蛋白表达水平(4.10±0.58、4.93±0.33比1.00±0.13)均较高(均P<0.05)。结论氟暴露可致大鼠肾组织损伤,SIRT3、P62表达水平下调,FOXO3a、PINK1、PARKIN及LC3表达水平上调。 展开更多
关键词 大鼠 线粒体自噬 沉默信息调节因子3-叉头蛋白o3a 张力蛋白同源物诱导的假定激酶1/E3泛素连接酶
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Novel nervous and multi-system regenerative therapeutic strategies for diabetes mellitus with mTOR 被引量:13
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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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