Molecular mechanisms for pancreatic beta cell failure・a viewpoint from endoplasmic reticulum stress
胰腺β细胞衰竭的分子机制·内质网应激的观点
基本信息
- 批准号:17390258
- 负责人:
- 金额:$ 9.6万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2005
- 资助国家:日本
- 起止时间:2005 至 2006
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Wolfram syndrome, an autosomal recessive disorder associated with diabetes mellitus and optic atrophy is caused by mutations in the WFS1 gene encoding an endoplasmic reticulum (ER) membrane protein. Herein, we report that pancreatic islets of wfs1-deficient mice exhibit increases in PKR-like ER kinase phosphorylation, chaperone gene expressions and active XBP1 protein levels, indicating an enhanced ER stress response. We established wfs1-deficient MIN6 clonal (β-cells by crossing wfs1-deficient mice with mice expressing simian virus 40 large T antigen in β-cells. These cells show essentially the same alterations in ER stress responses as wfs1-deficient islets, which were reversed by re-expression of WFS1 protein or overexpression of GRP78, a master regulator of ER stress. In contrast, these changes are observed neither in heart, skeletal muscle, nor brown adipose tissues with WFS 1-deficiency. The enhanced ER stress results in increased caspase 3 cleavage and reduced BrdU incorporation in the mutant islets, indicating accelerated apoptotic processes and impaired cell cycle progression in the mutant islets. These changes are associated with increased expression of p21^<CIP1> in wfs1-deficient islets and clonal β-cells. Treatment of islets with thapsigargin, an ER stress inducer, caused upregulation of p21^<CIP1>, and forced expression of p21^<CIP1> resulted in reduction in reduced MIN6 β-cell numbers, suggesting that the ER stress-induced increase in p21^<CIP1> expression to be involved in β-cell loss in the mutant islets. These data indicate that WFS1-deficiency activates the ER stress response specifically in β-cells, causing β-cell loss through increased apoptosis and impaired cell cycle progression.
Wolfram 综合征是一种与糖尿病和视神经萎缩相关的常染色体隐性遗传疾病,由编码内质网 (ER) 膜蛋白的 WFS1 基因突变引起。在此,我们报告 wfs1 缺陷小鼠的胰岛表现出 PKR 样 ER 激酶磷酸化、伴侣基因表达和活性 XBP1 蛋白水平的增加,表明 ER 应激反应增强。我们通过将 wfs1 缺陷小鼠与在 β 细胞中表达猿病毒 40 大 T 抗原的小鼠杂交,建立了 wfs1 缺陷的 MIN6 克隆(β 细胞)。这些细胞在 ER 应激反应中表现出与 wfs1 缺陷胰岛基本相同的改变,但通过 WFS1 蛋白的重新表达或 ER 主要调节因子 GRP78 的过表达来逆转这种变化。 压力。相比之下,在患有 WFS 1 缺陷的心脏、骨骼肌或棕色脂肪组织中都没有观察到这些变化。增强的内质网应激导致突变胰岛中 caspase 3 裂解增加和 BrdU 掺入减少,表明突变胰岛中细胞凋亡过程加速和细胞周期进程受损。这些变化与 p21^<CIP1> 表达增加有关 wfs1 缺陷的胰岛和克隆 β 细胞。用毒胡萝卜素(一种 ER 应激诱导剂)处理胰岛,导致 p21^<CIP1> 上调,并且 p21^<CIP1> 的强制表达导致 MIN6 β 细胞数量减少,表明 ER 应激诱导的 p21^<CIP1> 表达增加与胰岛中 β 细胞损失有关。 突变的胰岛。这些数据表明,WFS1 缺陷会特别激活 β 细胞中的 ER 应激反应,通过增加细胞凋亡和受损的细胞周期进程导致 β 细胞损失。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Efficient and controlled gene expression in mouse pancreatic islets by arterial delivery of tetracycline-inducible adenoviral vectors
- DOI:10.1677/jme.1.02189
- 发表时间:2007-02-01
- 期刊:
- 影响因子:3.5
- 作者:Takahashi, Rui;Ishihara, Hisamitsu;Oka, Yoshitomo
- 通讯作者:Oka, Yoshitomo
Endoplasmic reticulum stress induces Wfs1 gene expression in pancreatic β-cells via transcriptional activation
- DOI:10.1530/eje.1.01945
- 发表时间:2005-07-01
- 期刊:
- 影响因子:5.8
- 作者:Ueda, K;Kawano, J;Tanizawa, Y
- 通讯作者:Tanizawa, Y
Constitutively active PDX1 induced efficient insulin production in adult murine liver
- DOI:10.1016/j.bbrc.2004.11.047
- 发表时间:2005-01-14
- 期刊:
- 影响因子:3.1
- 作者:Imai, J;Katagiri, H;Oka, Y
- 通讯作者:Oka, Y
WFS1-deficiency enhances endoplasmic reticulum stress, triggers apoptotic pathway and impairs cell cycle progression specifically in pancreatic β-cells.
WFS1 缺陷会增强内质网应激,触发细胞凋亡途径并损害细胞周期进程,特别是在胰腺 β 细胞中。
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:Yamada T;Ishihara H;Tamura A;Takahashi R;Yamaguchi S;Takei D;Tokita A;Satake C;Tashiro F;Katagiri H;Aburatani H;Miyazaki J-I;Oka Y
- 通讯作者:Oka Y
Dissipating excess energy stored in the liver is a potential treatment strategy for diabetes associated with obesity
- DOI:10.2337/diabetes.54.2.322
- 发表时间:2005-02-01
- 期刊:
- 影响因子:7.7
- 作者:Ishigaki, Y;Katagiri, H;Oka, Y
- 通讯作者:Oka, Y
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OKA Yoshitomo其他文献
OKA Yoshitomo的其他文献
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{{ truncateString('OKA Yoshitomo', 18)}}的其他基金
Pancreatic β cell impairment and adaptation of type 2 diabetes mellitus in overnutrition era
营养过剩时代的胰腺β细胞损伤与2型糖尿病的适应
- 批准号:
19209034 - 财政年份:2007
- 资助金额:
$ 9.6万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Studies on mechanisms of insulin-stimulated glucose transport : analysis of downstream signaling and real-time monitoring of GLUT4 translocation
胰岛素刺激葡萄糖转运机制研究:下游信号分析和GLUT4易位实时监测
- 批准号:
13470226 - 财政年份:2001
- 资助金额:
$ 9.6万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Elucidation of diabetes-related genes
阐明糖尿病相关基因
- 批准号:
13204062 - 财政年份:2001
- 资助金额:
$ 9.6万 - 项目类别:
Grant-in-Aid for Scientific Research on Priority Areas
Generation of Wolfram syndrome mice, aiming at development of new therapeutics for diabetes through preserving pancreatic beta cells
培育 Wolfram 综合征小鼠,旨在通过保存胰腺 β 细胞开发糖尿病新疗法
- 批准号:
12357007 - 财政年份:2000
- 资助金额:
$ 9.6万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Molecular approach for the mechanism of insulin-stimulated glucose transport
胰岛素刺激葡萄糖转运机制的分子方法
- 批准号:
11470234 - 财政年份:1999
- 资助金额:
$ 9.6万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
Intracellular sorting of glucose transporter and insulin action
葡萄糖转运蛋白的细胞内分选和胰岛素作用
- 批准号:
10044296 - 财政年份:1998
- 资助金额:
$ 9.6万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
treatment using adenovirus vector
使用腺病毒载体进行治疗
- 批准号:
09357009 - 财政年份:1997
- 资助金额:
$ 9.6万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Molecular approach for mechanisms of glucose transport and insulin action
葡萄糖转运和胰岛素作用机制的分子方法
- 批准号:
08457266 - 财政年份:1996
- 资助金额:
$ 9.6万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Sorting mechanismof glucose transporters in mammalian cells.
哺乳动物细胞中葡萄糖转运蛋白的分选机制。
- 批准号:
07044226 - 财政年份:1995
- 资助金额:
$ 9.6万 - 项目类别:
Grant-in-Aid for international Scientific Research
Genes involved in insulin secretion and improvement of detection method for gene mutations in diabetic patients
糖尿病患者胰岛素分泌相关基因及基因突变检测方法的改进
- 批准号:
06557056 - 财政年份:1994
- 资助金额:
$ 9.6万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
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The Role of Pancreatic β-cell Store-Operated Calcium Entry in Fatty Acid Metabolism
胰腺β细胞库操作的钙进入在脂肪酸代谢中的作用
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IL-22 作为胰腺β细胞应激的抑制剂和糖尿病的治疗
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宫内营养不良影响出生后胰岛β细胞形成和功能的因素分析
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22590976 - 财政年份:2010
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Investigation of roles of GSK-3β in the regulation of pancreatic β cell mass for the application to the treatment of type 2 diabetes mellitus.
研究 GSK-3β 在调节胰腺 β 细胞质量中的作用及其在 2 型糖尿病治疗中的应用。
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转录因子FoxO1在胰腺β细胞增殖和新生中的作用
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