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银杏叶提取物对H_2O_2诱导的胰岛RIN-mβ细胞凋亡的影响 被引量:4
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作者 叶春玲 金永亮 +1 位作者 叶开和 覃亮 《中药材》 CAS CSCD 北大核心 2007年第4期424-428,共5页
目的:探讨银杏叶提取物(Ginkgo biloba extract,EGb761)对过氧化氢(Hydrogen peroxide,H2O2)诱导的胰岛RIN-mβ细胞株凋亡的影响。方法:以500μmol/L H2O2作用于胰岛RIN-mβ细胞6 h建立凋亡模型;分别设空白对照组(Control)、阴性对照组(... 目的:探讨银杏叶提取物(Ginkgo biloba extract,EGb761)对过氧化氢(Hydrogen peroxide,H2O2)诱导的胰岛RIN-mβ细胞株凋亡的影响。方法:以500μmol/L H2O2作用于胰岛RIN-mβ细胞6 h建立凋亡模型;分别设空白对照组(Control)、阴性对照组(H2O2)、阳性对照组(槲皮素Que 100μmol/L)、EGb 761单用对照组(EGb 761100μmol/L),EGb 761给药组(EGb 761 10、30、100μg/ml);采用MTT检测细胞存活率,Hoechst 33258染色荧光显微镜观察细胞形态变化,PI单染色法和Annexin V-PI双染色法流式细胞术分析细胞凋亡情况。结果:与空白对照组比较,阴性对照组500μmol/L H2O2作用6 h后,细胞存活率明显降低、细胞凋亡率显著升高(P<0.01)。与阴性对照组相比,EGb 761显著降低H2O2诱导的细胞凋亡(P<0.01),且呈剂量依赖性。结论:过氧化氢可诱导胰岛RIN-mβ细胞凋亡,EGb 761对H2O2诱导的RIN-mβ细胞损伤和凋亡具有明显的保护作用。 展开更多
关键词 银杏叶提取物 rin-mβ细胞株 过氧化氢 细胞凋亡
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烟酰胺单核苷酸对RIN-m5f细胞中胰岛素分泌及PDX-1和FoxO1基因表达的影响(英文) 被引量:3
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作者 盛飞凤 任贤 +7 位作者 戴幸平 徐潇静 董敏 裴奇 屈健 周智广 周宏灏 刘昭前 《中南大学学报(医学版)》 CAS CSCD 北大核心 2011年第10期958-963,共6页
目的:在细胞水平研究烟酰胺单核苷酸(nicotinamide mononucleotide,NMN)对胰岛素分泌的调节作用及其对与胰岛素分泌相关的重要转录因子胰十二指肠同源盒基因(pancreatic and duodenalhomeobox-1,PDX-1)和分叉头框家族转录因子1(forkhead... 目的:在细胞水平研究烟酰胺单核苷酸(nicotinamide mononucleotide,NMN)对胰岛素分泌的调节作用及其对与胰岛素分泌相关的重要转录因子胰十二指肠同源盒基因(pancreatic and duodenalhomeobox-1,PDX-1)和分叉头框家族转录因子1(forkhead box-containing protein O-1,FoxO1)基因表达的影响。方法:采用大鼠胰岛素ELISA试剂盒检测RIN-m5f细胞胰岛素分泌水平。用Real-time PCR检测RIN-m5f细胞PDX-1和FoxO1的mRNA表达水平。用Western印迹检测RIN-m5f细胞PDX-1蛋白表达水平。结果:用瑞格列奈10 nmol/L+NMN 100μmol/L处理RIN-m5f细胞48 h,与空白对照及DMSO对照组相比,胰岛素分泌量均显著增高(P<0.05);与NMN 50μmol/L组比较,胰岛素分泌量的增高也有统计学意义(P<0.05)。10,50和100μmol/L的NMN作用RIN-m5f细胞36 h,PDX-1的mRNA表达量均上调(依次为P<0.05,P<0.01,P<0.001)。100μmol/L剂量组与10μmol/L和50μmol/L剂量组比较差异也有统计学意义(P<0.001)。50,100和200μmol/L的NMN作用RIN-m5f细胞36或48 h,PDX-1的蛋白表达量与对照组比较差异无统计学意义(P>0.05)。结论:NMN可以调控RIN-m5f细胞中胰岛素的分泌及PDX-1的mRNA表达水平。 展开更多
关键词 烟酰胺单核苷酸 胰十二指肠同源盒基因 分叉头框家族转录因子1 rin-m5f
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血管紧张素Ⅱ诱导RIN-m细胞凋亡的实验研究
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作者 刘敏 蔡德鸿 +3 位作者 张桦 袁小澎 孙佳 陈宏 《实用医学杂志》 CAS 北大核心 2010年第17期3080-3082,共3页
目的:以不同浓度血管紧张素Ⅱ(AngⅡ)及AngⅡ1型受体(AT1受体)拮抗剂氯沙坦作用于RIN-m细胞(来源于射线诱导的褐鼠胰岛素细胞瘤),观察RIN-m合成及分泌胰岛素功能及细胞凋亡的情况。为进一步在临床中研究血管紧张素受体拮抗剂对糖代谢的... 目的:以不同浓度血管紧张素Ⅱ(AngⅡ)及AngⅡ1型受体(AT1受体)拮抗剂氯沙坦作用于RIN-m细胞(来源于射线诱导的褐鼠胰岛素细胞瘤),观察RIN-m合成及分泌胰岛素功能及细胞凋亡的情况。为进一步在临床中研究血管紧张素受体拮抗剂对糖代谢的改善作用提供实验证据。方法:细胞的培养及干预:RIN-m细胞(40~50代)接种于3mL含5.6mmol/L葡萄糖的RPMI1640培养液中。A组加入10μL生理盐水,B、C、D、E组加入终浓度分别为0.1、1、10及100nmol/L的AngⅡ,F组在加入100nmol/L的血管紧张素Ⅱ醋酸盐前10mim给予氯沙坦1μmol/L。各组处理后继续置于37℃、5%CO2的恒温培养箱中48h。RIN-m细胞行流式细胞仪(AnnexinV/FITC)及TUNEL检测凋亡。结果:两种凋亡检测结果大致相似,TUNNEL检测各组凋亡率分别为(7.50±1.18)%,(8.15±0.97)%,(12.67±1.35)%,(15.88±1.75)%,(20.66±0.80)%,(7.74±0.84)%;流式细胞仪检测各组凋亡率分别为(7.62±0.87)%,(8.74±1.31)%,(14.64±1.48)%,(16.47±0.88)%,(20.51±1.03)%,(7.63±0.79)%。AngⅡ干预组凋亡率高于空白对照组,并呈剂量-效应依赖关系,氯沙坦预处理+AngⅡ组与空白对照组比较差异无统计学意义(P=0.98)。结论:AngⅡ可能通过与胰岛β细胞表面AT1受体结合而诱导RIN-m细胞凋亡,氯沙坦可抑制AngⅡ的促凋亡作用。 展开更多
关键词 rin-m细胞 血管紧张素Ⅱ 凋亡
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Exploring the genetic basis of childhood monogenic diabetes
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作者 Debmalya Sanyal 《World Journal of Diabetes》 SCIE 2024年第9期1829-1832,共4页
Monogenic diabetes is caused by one or even more genetic variations,which may be uncommon yet have a significant influence and cause diabetes at an early age.Monogenic diabetes affects 1%to 5%of children,and early det... Monogenic diabetes is caused by one or even more genetic variations,which may be uncommon yet have a significant influence and cause diabetes at an early age.Monogenic diabetes affects 1%to 5%of children,and early detection and genetically focused treatment of neonatal diabetes and maturity-onset diabetes of the young can significantly improve long-term health and well-being.The etiology of monogenic diabetes in childhood is primarily attributed to genetic variations affecting the regulatory genes responsible for beta-cell activity.In rare instances,mutations leading to severe insulin resistance can also result in the development of diabetes.Individuals diagnosed with specific types of monogenic diabetes,which are commonly found,can transition from insulin therapy to sulfonylureas,provided they maintain consistent regulation of their blood glucose levels.Scientists have successfully devised materials and methodologies to distinguish individuals with type 1 or 2 diabetes from those more prone to monogenic diabetes.Genetic screening with appropriate findings and interpretations is essential to establish a prognosis and to guide the choice of therapies and management of these interrelated ailments.This review aims to design a comprehensive literature summarizing genetic insights into monogenetic diabetes in children and adolescents as well as summarizing their diagnosis and management. 展开更多
关键词 Monogenic diabetes Genetic mutation Insulin resistance beta-cell function Diabetes mellitus
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罗格列酮对高糖诱导RIN-m细胞凋亡的作用及其机制探讨
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作者 胡文 洪兵 俞伟男 《山东医药》 CAS 北大核心 2010年第17期25-27,共3页
目的探讨罗格列酮对高糖诱导的RIN-m细胞凋亡作用及其机制。方法采用分别含5.5 mmol/L葡萄糖、33.3 mmol/L葡萄糖、5.5 mmol/L葡萄糖+10μmol/L罗格列酮及33.3 mmol/L葡萄糖+50μmol/L罗格列酮的培养液培养RIN-m细胞。以放射免疫法检测... 目的探讨罗格列酮对高糖诱导的RIN-m细胞凋亡作用及其机制。方法采用分别含5.5 mmol/L葡萄糖、33.3 mmol/L葡萄糖、5.5 mmol/L葡萄糖+10μmol/L罗格列酮及33.3 mmol/L葡萄糖+50μmol/L罗格列酮的培养液培养RIN-m细胞。以放射免疫法检测胰岛素分泌水平。以流式细胞仪及TUNEL法检测RIN-m细胞凋亡情况。同时行免疫细胞化学染色,半定量分析Bcl-2和Bax的表达。RT-PCR检测胰腺十二指肠同源盒-1(PDX-1)mRNA表达。结果长期高糖可导致RIN-m细胞胰岛素分泌功能下降、凋亡率增加2.7倍(P<0.05)。罗格列酮可以增加高糖环境下RIN-m细胞胰岛素的分泌、降低RIN-m细胞凋亡率(P<0.05)。长期高糖可以降低RIN-m细胞Bcl-2/Bax的比例,并下调PDX-1 mRNA表达(P<0.05)。10μmol/L罗格列酮即可增加高糖环境下RIN-m细胞Bcl-2/Bax表达的比例及上调PDX-1 mRNA表达(P均<0.05)。结论罗格列酮对RIN-m细胞有直接的保护作用,这种保护作用可能与罗格列酮增加了Bcl-2/Bax表达比例和上调PDX-1 mRNA表达,进而抑制RIN-m细胞凋亡有关。 展开更多
关键词 rin-m细胞 细胞凋亡 罗格列酮 BCL-2/BAX PDX-1 MRNA
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黄刺多糖中单糖含量与体外降血糖活性相关性分析
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作者 岳庆明 韩丽娟 +2 位作者 邓永蓉 马娜娜 赵玉欣 《食品科学》 EI CAS CSCD 北大核心 2024年第8期122-133,共12页
基于糖脂毒性(glucolipotoxicity,GLTy)诱导的RIN-m5F胰岛细胞模型及α-葡萄糖苷酶和α-淀粉酶活性共同探究不同产地黄刺多糖(Berberi dasystachya polysaccharides,BDPs)降血糖活性,以期探究其单糖含量与降血糖活性之间的相关性。以青... 基于糖脂毒性(glucolipotoxicity,GLTy)诱导的RIN-m5F胰岛细胞模型及α-葡萄糖苷酶和α-淀粉酶活性共同探究不同产地黄刺多糖(Berberi dasystachya polysaccharides,BDPs)降血糖活性,以期探究其单糖含量与降血糖活性之间的相关性。以青海省5个地区黄刺浆果为原料,采用超声辅助热水浸提法提取5种不同产地BDPs(Ⅰ~Ⅴ),明确BDPs化学组成及初级结构,探讨BDPs体外降血糖活性及对GLTy损伤的胰岛细胞的保护作用,揭示BDPs单糖含量与降血糖活性之间的相关性。结果表明,不同产地BDPs均是由β-糖苷键连接且具有吡喃糖环骨架构型的不具备三螺旋构象的杂多糖,在200℃以下表现出优良的热稳定性。另外不同产地BDPs单糖组成及分子质量存在较大差异。不同产地BDPs均展现了良好的体外降血糖活性,其中BDPs-I对α-淀粉酶具有显著的抑制效果,抑制率高达67.41%(P<0.05)。此外,不同产地BDPs对GLTy诱导的RIN-m5F胰岛细胞具有良好的保护作用,其中BDPs-I具有最优的细胞增殖活性,可有效清除活性氧水平,显著降低肿瘤坏死因子-α含量。最后,通过相关性分析发现葡萄糖、半乳糖、鼠李糖等单糖与α-淀粉酶抑制率呈现较强的正相关关系,甘露糖与活性氧之间存在较强的负相关性。本研究为黄刺浆果资源在降血糖活性方面的利用及开发提供一定理论依据。 展开更多
关键词 黄刺多糖 单糖 rin-m5F胰岛细胞 体外降血糖活性 糖脂毒性 相关性分析
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罗格列酮对RIN-m细胞高糖损害干预作用研究
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作者 胡文 俞伟男 李伟 《徐州医学院学报》 CAS 2008年第2期74-78,共5页
目的研究罗格列酮(rosiglitazone,RSG)对胰岛β细胞高糖损害的干预作用。方法采用生理浓度葡萄糖(5.5 mmol/L)、生理浓度葡萄糖+罗格列酮、高浓度葡萄糖(33.3 mmol/L)、高浓度葡萄糖+罗格列酮培养RIN-m细胞。以放射免疫法检测胰岛素分... 目的研究罗格列酮(rosiglitazone,RSG)对胰岛β细胞高糖损害的干预作用。方法采用生理浓度葡萄糖(5.5 mmol/L)、生理浓度葡萄糖+罗格列酮、高浓度葡萄糖(33.3 mmol/L)、高浓度葡萄糖+罗格列酮培养RIN-m细胞。以放射免疫法检测胰岛素分泌水平。以流式细胞仪及TUNEL法检测RIN-m细胞凋亡。RT-PCR方法检测胰腺十二指肠同源盒-1(pancreatic duodenal homeobox factor-1,PDX-1)和胰岛素mRNA表达。结果①RIN-m细胞与33.3 mmol/L的葡萄糖孵育2周后胰岛素分泌功能开始下降,细胞凋亡率增长2.7倍(P<0.01)。而罗格列酮可以修复胰岛素的分泌,降低RIN-m细胞凋亡率。②罗格列酮上调PDX-1(1.30±0.06 vs.1.61±0.10,P<0.01)和胰岛素(1.75±0.09 vs.1.98±0.11,P<0.01)mRNA表达。结论高糖抑制胰岛β细胞胰岛素分泌,并诱导其凋亡。罗格列酮具有直接保护β细胞免于高糖毒性的作用。 展开更多
关键词 罗格列酮 rin-m细胞 凋亡 胰腺十二指肠同源盒-1
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血管紧张素Ⅱ对RIN-m细胞胰岛素基因表达的影响及其分子机制研究
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作者 鲁辛 张桦 《中国药师》 CAS 2015年第12期2025-2029,共5页
目的:探讨血管紧张素Ⅱ(angiotensinⅡ,AngⅡ)对RIN-m细胞胰岛素基因表达的影响及其相关分子机制。方法:常规培养大鼠胰岛素瘤RIN-m细胞,分为3组:空白对照组、100 nmol·L^(-1)AngⅡ组和氯沙坦预处理组,干预24h,采用RTPCR法检测胰... 目的:探讨血管紧张素Ⅱ(angiotensinⅡ,AngⅡ)对RIN-m细胞胰岛素基因表达的影响及其相关分子机制。方法:常规培养大鼠胰岛素瘤RIN-m细胞,分为3组:空白对照组、100 nmol·L^(-1)AngⅡ组和氯沙坦预处理组,干预24h,采用RTPCR法检测胰岛素基因表达,流式细胞仪检测2',7'-二氯荧光素(DCF)的平均荧光强度,RT-PCR法检测胰十二指肠同源盒-1(PDX-1)及肌腱膜纤维肉瘤肿瘤基因同系物A(MafA)mRNA表达,Western-blot法检测PDX-1及MafA蛋白表达。结果:100nmol·L^(-1)AngⅡ组与空白组和氯沙坦预处理组间的胰岛素mRNA表达、活性氧(reactive oxygen species,ROS)水平、PDX-1、MafA mRNA及蛋白表达均有显著差异(P<0.05),后两者之间差异无统计学意义(P>0.05)。结论:AngⅡ可能通过氧化应激途径下调β细胞的PDX-1及MafA活性,进而抑制β细胞胰岛素基因表达。氯沙坦预处理可以拮抗AngⅡ对β细胞的氧化应激损伤,从而在胰岛素基因表达方面对β细胞起到保护作用。 展开更多
关键词 血管紧张素Ⅱ rin-m细胞 胰岛素基因表达 分子机制
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氯通道阻断剂对H_2O_2诱导的胰岛RIN-mβ细胞凋亡的影响 被引量:2
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作者 任省华 叶春玲 +2 位作者 金永亮 吕艳青 冯娟 《中国药理学通报》 CAS CSCD 北大核心 2007年第9期1202-1206,共5页
目的观察氯通道阻断剂对H2O2诱导的胰岛RIN-mβ细胞凋亡的影响,探讨氯通道在RIN-mβ细胞凋亡中的作用。方法采用H2O2诱导的胰岛RIN-mβ细胞凋亡模型,观察氯通道阻断剂(DIDS、NPPB和NFA)对细胞存活率、形态学变化、凋亡的影响。结果氯通... 目的观察氯通道阻断剂对H2O2诱导的胰岛RIN-mβ细胞凋亡的影响,探讨氯通道在RIN-mβ细胞凋亡中的作用。方法采用H2O2诱导的胰岛RIN-mβ细胞凋亡模型,观察氯通道阻断剂(DIDS、NPPB和NFA)对细胞存活率、形态学变化、凋亡的影响。结果氯通道阻断剂单用时对胰岛RIN-mβ细胞活力无明显影响,但能明显提高H2O2处理的胰岛RIN-mβ细胞的存活率。与模型对照组相比,氯通道阻断剂DIDS、NPPB和NFA对抗组细胞存活率明显增加(P<0.01),细胞凋亡率明显降低(P<0.01)。结论氯通道阻断剂对H2O2诱导的RIN-mβ细胞损伤和凋亡具有明显的保护作用。 展开更多
关键词 胰岛rin-mβ细胞 凋亡 过氧化氢 氯通道阻断剂
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穿心莲内酯衍生物抗H2O2诱导胰岛RIN-mβ细胞凋亡的蛋白组学研究 被引量:1
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作者 周辉华 丁文 +2 位作者 贾红玲 王玉强 晏光荣 《生态科学》 CSCD 2010年第1期80-84,共5页
采用蛋白组学方法筛选穿心莲内酯衍生物(AL-1)抗过氧化氢诱导胰岛RIN—mβ细胞凋亡的差异蛋白质分子并探讨其作用分子机制。结果显示:AL-1浓度依赖性地提高H2O2处理的胰RIN-mβ细胞的存活率。经蛋白组学研究分析,成功地鉴定了18个... 采用蛋白组学方法筛选穿心莲内酯衍生物(AL-1)抗过氧化氢诱导胰岛RIN—mβ细胞凋亡的差异蛋白质分子并探讨其作用分子机制。结果显示:AL-1浓度依赖性地提高H2O2处理的胰RIN-mβ细胞的存活率。经蛋白组学研究分析,成功地鉴定了18个与凋亡、应激等相关的蛋白,包括Prohibitin、Shmt2、RhoGDP-dissociation inhibitor-1、Galectin-1、Cytb5、Hsps等;与对照组(H202)相比,处理组(AL-1+H2O2)中,有9个表达上调的蛋白和9个表达下调的蛋白。AL-1过调控与细胞凋亡、应激等相关的蛋白发挥其抗H2O2诱导的凋亡作用。 展开更多
关键词 穿心莲内酯衍生物AL-1 H2O2 胰岛rin-mβ细胞株 双向凝胶电泳 蛋白质组学
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Relationship between Free Thyroxine and Islet Beta-cell Function in Euthyroid Subjects 被引量:3
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作者 Qing LI Meng LU +9 位作者 Ning-jian WANG Yi CHEN Ying-chao CHEN Bing HAN Qin LI Fang-zhen XIA Bo-ren JIANG Hua-ling ZHAI Dong-ping LIN Ying-li LU 《Current Medical Science》 SCIE CAS 2020年第1期69-77,共9页
Thyroid hormones have a specific effect on glucose-induced insulin secretion from the pancreas.We aimed to investigate the association between euthyroid hormones and islet betacell function in general population and n... Thyroid hormones have a specific effect on glucose-induced insulin secretion from the pancreas.We aimed to investigate the association between euthyroid hormones and islet betacell function in general population and non-treated type 2 diabetes mellitus(T2DM)patients.A total of 5089 euthyroid participants(including 4601 general population and 488 non-treated T2DM patients)were identified from a cross-sectional survey on the prevalence of metabolic diseases and risk factors in East China from February 2014 to June 2016.Anthropometric indices,biochemical parameters,and thyroid hormones were measured.Compared with general population,non-treated T2DM patients exhibited higher total thyroxine(TT4)and free thyroxine(FT4)levels but lower ratio of free triiodothyronine(T3):T4(P<0.01).HOMA-βhad prominently negative correlation with FT4 and positive relationship with free T3:T4 in both groups even after adjusting for age,body mass index(BMI)and smoking.When analyzed by quartiles of FT4 or free T3:T4,there were significantly decreased trend of HOMA-β going with the higher FT4 and lower free T3:T4 in both groups.Linear regression analysis showed that FT4 but not FT3 and free T3:T4 was negatively associated with HOMA-β no matter in general population or T2DM patients,which was independent of age,BMI,smoking,hypertension and lipid profiles.FT4 is independently and negatively associated with islet beta-cell function in euthyroid subjects.Thyroid hormone even in reference range could play an important role in the function of pancreatic islets. 展开更多
关键词 free thyroxine free triiodothyronine islet beta-cell function euthyroid hormones DIABETES
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GLP1R-GFP稳定转染Rin-m5F细胞系的构建
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作者 胡涌泉 曾璐漫 +2 位作者 吴艳阳 魏云林 刘东波 《中南药学》 CAS 2017年第6期785-789,共5页
目的本研究目的是构建一种能稳定表达绿色荧光蛋白(GFP)人胰高血糖素样肽-1受体(GLP1R)的胰岛细胞系,用来筛选GLP1R激动剂类药物。方法使用X-treme GENE HP DNA Transfection Reagent将pCMV6-AC-GLP1R-GFP质粒转染到Rin-m5F细胞,经G418... 目的本研究目的是构建一种能稳定表达绿色荧光蛋白(GFP)人胰高血糖素样肽-1受体(GLP1R)的胰岛细胞系,用来筛选GLP1R激动剂类药物。方法使用X-treme GENE HP DNA Transfection Reagent将pCMV6-AC-GLP1R-GFP质粒转染到Rin-m5F细胞,经G418筛选单克隆Rinm5F/GLP1R-GFP细胞并扩大培养。结果该细胞能稳定传代,荧光显微镜下观察细胞绿色荧光分布均匀,Western blot验证GLP1R蛋白表达显著增加。在实验验证中,对照空白组中细胞绿色荧光分布均匀,阴性药物格列本脲(非GLP1R靶点药物)作用时细胞内无明显荧光斑点出现,阳性药物百泌达作用(GLP1R激动剂类药物)时细胞内出现显著荧光斑点。结论 GLP1R激动剂类药物筛选模型Rin-m5F/GLP1R-GFP成功构建。该模型能对混合物样品进行筛选,具有假阳性极低、筛选所需样本小、筛选样品量大、易标准化、筛选速度快、特异性强等优势,为GLP1R激动剂类药物的筛选奠定了基础。 展开更多
关键词 人胰高血糖素样肽-1受体 rin-m5F 质粒转染
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豆芋异黄酮的制备及其对RIN-m5F细胞氧化损伤的保护作用
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作者 邓珂 陈镠 +5 位作者 杨良缘 胡钰 许光治 张有做 王艳 倪勤学 《食品科学》 EI CAS CSCD 北大核心 2022年第19期200-207,共8页
以豆芋(Apios americana Medik.)为原料,采用乙醇热回流提取、乙酸乙酯萃取,以异黄酮质量浓度为指标,优化大孔树脂富集工艺,并对得到的豆芋异黄酮(记为AI-3)抗氧化活性、α-葡萄糖苷酶抑制能力及对胰岛瘤细胞RIN-m5F氧化损伤的保护作用... 以豆芋(Apios americana Medik.)为原料,采用乙醇热回流提取、乙酸乙酯萃取,以异黄酮质量浓度为指标,优化大孔树脂富集工艺,并对得到的豆芋异黄酮(记为AI-3)抗氧化活性、α-葡萄糖苷酶抑制能力及对胰岛瘤细胞RIN-m5F氧化损伤的保护作用进行探究。结果:优化的D101型大孔树脂富集工艺为:上样质量浓度1.5 mg/m L,体积分数80%乙醇溶液(p H 6)洗脱,洗脱体积80 m L(4倍柱体积),所得AI-3得率为0.44%(占豆芋干基质量),异黄酮质量分数50.83%;AI-3对1,1-二苯基-2-三硝基苯肼自由基、2,2’-联氮-双(3-乙基苯并噻唑啉-6-磺酸)阳离子自由基的半抑制质量浓度分别为19.51、3.40 μg/m L,铁离子还原抗氧化能力为387.83 μmol/mg,对α-葡萄糖苷酶活力的半抑制质量浓度为235.97 μg/m L;AI-3在0~300 μg/m L范围内,RIN-m5F细胞存活率同空白对照组相比无显著差异(P>0.05),且25~300 μg/m L时可极显著提高RIN-m5F氧化损伤细胞的存活率(P<0.01),300 μg/m L时细胞存活率达84.19%,高于阳性对照组。结论:D101型大孔树脂可有效富集豆芋异黄酮,所得AI-3具有较强的抗氧化、α-葡萄糖苷酶抑制活性及RIN-m5F细胞氧化损伤保护作用。研究结果为开发预防糖尿病等代谢综合征功能性食品提供了理论依据。 展开更多
关键词 豆芋异黄酮 大孔树脂富集 抗氧化 α-葡萄糖苷酶抑制 rin-m5F细胞保护
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Antioxidant,anti-alpha-glucosidase and pancreatic beta-cell protective effects of methanolic extract of Ensete superbum Cheesm seeds
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作者 Solomon Habtemariam George Kabakasseril Varghese 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2017年第2期121-125,共5页
Objective: To investigate the antioxidant, anti-a-glucosidase and pancreatic b-cell protective potential of Ensete superbum(E. superbum) seeds.Methods: A variety of in vitro assays including radical scavenging, reduci... Objective: To investigate the antioxidant, anti-a-glucosidase and pancreatic b-cell protective potential of Ensete superbum(E. superbum) seeds.Methods: A variety of in vitro assays including radical scavenging, reducing power potential, phenolic content determination, a-glucosidase assay and pancreatic b-cell(1.4E7 cells) viability were employed for assessing the effect of methanolic extract of E. superbum seeds.Results: The radical scavenging and reducing power effects comparable with the standard rutin were obtained while the enzyme inhibitory activity of the extract was 68-fold better than the standard antidiabetic drug, acarbose. The seed extract of E. superbum was packed-full of polyphenols with mean percentage gallic acid equivalent value of(38.2 ± 1.8)(n = 3). The protection of pancreatic cells from massive onslaught of hydrogen peroxide was far superior to that obtained for rutin.Conclusions: The reputed antidiabetic therapeutic uses of the seeds extract of E. superbum may be justified on the basis of inhibition of carbohydrate enzymes, antioxidant effects and pancreatic b-cell protection. 展开更多
关键词 Ensete superbum MUSACEAE SEEDS ANTIOXIDANT Pancreatic beta-cell protection Alpha-glucosidase inhibition
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黄刺多糖工艺优化及其对过氧化氢损伤的胰岛β细胞的保护作用 被引量:1
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作者 邓永蓉 韩丽娟 +3 位作者 岳庆明 漆莹 马娜娜 赵玉欣 《食品与发酵工业》 CAS CSCD 北大核心 2023年第3期146-156,共11页
为研究黄刺粗多糖(Berberi dasystachya polysaccharides,BDPs)对H_(2)O_(2)诱导的RIN-m5F细胞氧化损伤的保护作用,以黄刺浆果为原料,通过单因素试验和响应面Box-Behnken设计实验优化超声波辅助酶解提取黄刺果实多糖的工艺。采用高效体... 为研究黄刺粗多糖(Berberi dasystachya polysaccharides,BDPs)对H_(2)O_(2)诱导的RIN-m5F细胞氧化损伤的保护作用,以黄刺浆果为原料,通过单因素试验和响应面Box-Behnken设计实验优化超声波辅助酶解提取黄刺果实多糖的工艺。采用高效体积排阻色谱、离子色谱、扫描电镜及刚果红实验对BDPs理化性质进行分析,以H_(2)O_(2)诱导RIN-m5F细胞建立氧化应激损伤模型,通过CCK-8法测定细胞存活率,DCFH-DA探针法检测细胞内活性氧(reactive oxygen species,ROS)水平、比色法测定细胞内超氧化物歧化酶(superoxide dismutase,SOD)、过氧化氢酶(catalase,CAT)活性和丙二醛(malondialdehyde,MDA)含量探讨BDPs对氧化损伤细胞的保护作用。结果表明,当加酶量为1.25%(质量分数),酶解时间57 min,酶解温度45℃,超声波功率164 W时,黄刺多糖提取得率为(3.478±0.075)%,与预测值3.451%相近。此外,BDPs的重均分子质量为10.2 kDa,主要由岩藻糖、鼠李糖、半乳糖、葡萄糖、木糖、甘露糖、半乳糖醛酸以及葡萄糖醛酸组成(摩尔比为1∶42.2∶32.6∶11.8∶4.4∶56.1∶5.1∶1.8)。刚果红实验结果表明,BDPs具有三螺旋结构。细胞实验结果表明,H_(2)O_(2)能够导致RIN-m5F细胞的氧化损伤,与模型组相比,经0.0625~0.5 mg/mL的BDPs干预后的细胞存活率增加(P<0.05),ROS、MDA水平呈下降趋势。BDPs能够提高细胞SOD、CAT活性,并且呈一定量效关系。综上所述,BDPs在一定剂量范围内可以提高细胞存活率,对H_(2)O_(2)诱导的氧化损伤具有保护作用,研究结果可为黄刺多糖功能研究提供参考。 展开更多
关键词 黄刺多糖 抗氧化 rin-m5F细胞 氧化应激
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Genetic perspectives on childhood monogenic diabetes:Diagnosis,management,and future directions 被引量:2
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作者 Hong-Yan Sun Xiao-Yan Lin 《World Journal of Diabetes》 SCIE 2023年第12期1738-1753,共16页
Monogenic diabetes is caused by one or even more genetic variations, which maybe uncommon yet have a significant influence and cause diabetes at an early age.Monogenic diabetes affects 1 to 5% of children, and early d... Monogenic diabetes is caused by one or even more genetic variations, which maybe uncommon yet have a significant influence and cause diabetes at an early age.Monogenic diabetes affects 1 to 5% of children, and early detection and geneticallyfocused treatment of neonatal diabetes and maturity-onset diabetes of theyoung can significantly improve long-term health and well-being. The etiology ofmonogenic diabetes in childhood is primarily attributed to genetic variationsaffecting the regulatory genes responsible for beta-cell activity. In rare instances,mutations leading to severe insulin resistance can also result in the developmentof diabetes. Individuals diagnosed with specific types of monogenic diabetes,which are commonly found, can transition from insulin therapy to sulfonylureas,provided they maintain consistent regulation of their blood glucose levels.Scientists have successfully devised materials and methodologies to distinguishindividuals with type 1 or 2 diabetes from those more prone to monogenicdiabetes. Genetic screening with appropriate findings and interpretations isessential to establish a prognosis and to guide the choice of therapies andmanagement of these interrelated ailments. This review aims to design a comprehensiveliterature summarizing genetic insights into monogenetic diabetes inchildren and adolescents as well as summarizing their diagnosis and management. 展开更多
关键词 Monogenic diabetes Maturity-onset diabetes of the young Insulin resistance Genetic mutation beta-cell function
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PARP-1抑制剂在游离脂肪酸诱导胰岛细胞凋亡中的作用 被引量:1
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作者 潘玉琴 曾庆娣 +3 位作者 许向红 何帮顺 毛晓明 王书奎 《南京医科大学学报(自然科学版)》 CAS CSCD 北大核心 2008年第3期291-295,326,共6页
目的:探讨PARP-1抑制剂3-氨基苯酰胺(3-Aminobenzamide,3-AB)在游离脂肪酸棕榈酸诱发的胰岛细胞凋亡和坏死中的作用。方法:常规培养RIN-m5F细胞株,采用四甲基偶氮唑盐(MTT)比色法观察棕榈酸和PARP-1抑制剂3-AB作用后细胞的增殖情况,并... 目的:探讨PARP-1抑制剂3-氨基苯酰胺(3-Aminobenzamide,3-AB)在游离脂肪酸棕榈酸诱发的胰岛细胞凋亡和坏死中的作用。方法:常规培养RIN-m5F细胞株,采用四甲基偶氮唑盐(MTT)比色法观察棕榈酸和PARP-1抑制剂3-AB作用后细胞的增殖情况,并用流式细胞术及TUNEL法分析细胞凋亡和坏死。结果:棕榈酸明显抑制RIN-m5F细胞的增殖(P<0.01);低浓度3-AB与棕榈酸共同孵育24h后细胞的凋亡率和坏死率显著低于棕榈酸单独培养(P<0.01);高浓度3-AB与棕榈酸共同孵育后较棕榈酸单独培养时细胞凋亡率显著性增强(P<0.01)。结论:低浓度3-AB能有效抑制棕榈酸所诱导的胰岛细胞株RIN-m5F细胞坏死,缓解细胞凋亡;而高浓度3-AB则促进细胞凋亡。进一步说明了3-AB在棕榈酸所诱导的胰岛细胞凋亡过程中具有双重作用,此可为2型糖尿病的治疗提供一个新的靶点。 展开更多
关键词 PARP-1 3-氨基苯酰胺 棕榈酸 rin-m5F细胞 2型糖尿病
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Pancreatic fat and β-cell function in overweight/obese children with nonalcoholic fatty liver disease 被引量:6
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作者 Lucia Pacifico Michele Di Martino +4 位作者 Caterina Anania Gian Marco Andreoli Mario Bezzi Carlo Catalano Claudio Chiesa 《World Journal of Gastroenterology》 SCIE CAS 2015年第15期4688-4695,共8页
AIM: To analyze the associations of pancreatic fat with other fat depots and β-cell function in pediatric nonalcoholic fatty liver disease(NAFLD).METHODS: We examined 158 overweight/obese children and adolescents, 80... AIM: To analyze the associations of pancreatic fat with other fat depots and β-cell function in pediatric nonalcoholic fatty liver disease(NAFLD).METHODS: We examined 158 overweight/obese children and adolescents, 80 with NAFLD [hepatic fat fraction(HFF) ≥ 5%] and 78 without fatty liver. Visceral adipose tissue(VAT), pancreatic fat fraction(PFF) and HFF were determined by magnetic resonance imaging. Estimates of insulin sensitivity were calculated using the homeostasis model assessment of insulin resistance(HOMA-IR), defined by fasting insulin and fasting glucose and whole-body insulin sensitivity index(WBISI), based on mean values of insulin and glucose obtained from oral glucose tolerance test and the corresponding fasting values. Patients were considered to have prediabetes if they had either:(1) impaired fasting glucose, defined as a fasting glucose level ≥ 100 mg/d L to < 126 mg/d L;(2) impaired glucose tolerance, defined as a 2 h glucose concentration between ≥ 140 mg/d L and < 200 mg/d L; or(3) hemoglobin A1 c value of ≥ 5.7% to < 6.5%.RESULTS: PFF was significantly higher in NAFLD patients compared with subjects without liver involvement. PFF was significantly associated with HFF and VAT, as well as fasting insulin, C peptide, HOMA-IR, and WBISI. The association between PFF and HFF was no longer significant after adjusting for age, gender, Tanner stage, body mass index(BMI)-SD score, and VAT. In multiple regression analysis withWBISI or HOMA-IR as the dependent variables, against the covariates age, gender, Tanner stage, BMI-SD score, VAT, PFF, and HFF, the only variable significantly associated with WBISI(standardized coefficient B,-0.398; P = 0.001) as well as HOMA-IR(0.353; P = 0.003) was HFF. Children with prediabetes had higher PFF and HFF than those without. PFF and HFF were significantly associated with prediabetes after adjustment for clinical variables. When all fat depots where included in the same model, only HFF remained significantly associated with prediabetes(OR = 3.38; 95%CI: 1.10-10.4; P = 0.034).CONCLUSION: In overweight/obese children with NAFLD, pancreatic fat is increased compared with those without liver involvement. However, only liver fat is independently related to prediabetes. 展开更多
关键词 NONALCOHOLIC FATTY liver disease Pancreaticfat VISCERAL FAT beta-celL function Children
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Adipose stem cell-based regenerative medicine for reversal of diabetic hyperglycemia 被引量:5
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作者 Hyun Joon Paek Courtney Kim Stuart K Williams 《World Journal of Diabetes》 SCIE CAS 2014年第3期235-243,共9页
Diabetes mellitus(diabetes) is a devastating disease that affects millions of people globally and causes a myriad of complications that lead to both patient morbidity and mortality. Currently available therapies, incl... Diabetes mellitus(diabetes) is a devastating disease that affects millions of people globally and causes a myriad of complications that lead to both patient morbidity and mortality. Currently available therapies, including insulin injection and beta cell replacement through either pancreas or pancreatic islet transplantation, are limited by the availability of organs. Stem cells provide an alternative treatment option for beta cell replacement through selective differentiation of stem cells into cells that recognize glucose and produce and secrete insulin. Embryonic stem cells, albeit pluripotent, face a number of challenges, including ethical and political concerns and potential teratoma formation. Adipose tissue represents an alternative source of multipotent mesenchymal stem cells, which can be obtained using a relatively simple, non-invasive, and inexpensive method. Similarly to other adult mesenchymal stem cells, adipose-derived stem cells(ADSCs) are capable of differentiating into insulin-producing cells. They are also capable of vasculogenesis and angiogenesis, which facilitate engraftment of donor pancreatic islets when co-transplanted. Additionally, anti-inflammatory and immunomodulatory effects of ADSCs can protect donorislets during the early phase of transplantation and subsequently improve engraftment of donor islets into the recipient organ. Although ADSC-therapy is still in its infancy, the potential benefits of ADSCs are far reaching. 展开更多
关键词 DIABETES MELLITUS DIABETES Insulin Stem cells ADIPOSE PANCREAS beta-cells Differentiation
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Islet cell dysfunction in patients with chronic pancreatitis 被引量:5
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作者 Ayan Roy Jayaprakash Sahoo +3 位作者 Sadishkumar Kamalanathan Dukhabandhu Naik Pazhanivel Mohan Biju Pottakkat 《World Journal of Diabetes》 SCIE CAS 2020年第7期280-292,共13页
Chronic pancreatitis(CP)is characterized by progressive inflammation and fibrosis of the pancreas that eventually leads to pancreatic exocrine and endocrine insufficiency.Diabetes in the background of CP is very diffi... Chronic pancreatitis(CP)is characterized by progressive inflammation and fibrosis of the pancreas that eventually leads to pancreatic exocrine and endocrine insufficiency.Diabetes in the background of CP is very difficult to manage due to high glycemic variability and concomitant malabsorption.Progressive beta cell loss leading to insulin deficiency is the cardinal mechanism underlying diabetes development in CP.Alpha cell dysfunction leading to deranged glucagon secretion has been described in different studies using a variety of stimuli in CP.However,the emerging evidence is varied probably because of dependence on the study procedure,the study population as well as on the stage of the disease.The mechanism behind islet cell dysfunction in CP is multifactorial.The intra-islet alpha and beta cell regulation of each other is often lost.Moreover,secretion of the incretin hormones such as glucagon like peptide-1 and glucose-dependent insulinotropic polypeptide is dysregulated.This significantly contributes to islet cell disturbances.Persistent and progressive inflammation with changes in the function of other cells such as islet delta cells and pancreatic polypeptide cells are also implicated in CP.In addition,the different surgical procedures performed in patients with CP and antihyperglycemic drugs used to treat diabetes associated with CP also affect islet cell function.Hence,different factors such as chronic inflammation,dysregulated incretin axis,surgical interventions and anti-diabetic drugs all affect islet cell function in patients with CP.Newer therapies targeting alpha cell function and beta cell regeneration would be useful in the management of pancreatic diabetes in the near future. 展开更多
关键词 Alpha cell beta-celL Chronic pancreatitis DIABETES INCRETINS Pancreatic diabetes
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