Effects of Fractalkine on Beta Cell Function

Fractalkine 对 β 细胞功能的影响

基本信息

项目摘要

DESCRIPTION (provided by applicant): The prevalence of Type 2 diabetes has risen dramatically in the United States and globally for the past few decades and has now reached epidemic proportions. The etiology of this disease involves both insulin resistance and decreased β cell function, and one typically needs both defects (2 hit hypothesis) in order to develop the full hyperglycemic diabetic state. Current anti-diabetic therapeutics is available, but is inadequate to control the disease in most patients and there is a large unmet medical need for better methods of treating diabetes to prevent morbidity and mortality. Our recent work has led to the discovery that Fractalkine (FKN) (CX3CL1) working exclusively by signaling through its cognate receptor CX3CR1 in β cells, leads to enhanced glucose, arginine, and GLP-1 stimulated insulin secretion with markedly improved glucose tolerance in obese and diabetic mouse models. Thus, CX3CR1 KO mice are glucose intolerant due to decreased insulin secretion. Furthermore, neutralization of circulating FKN by administration of anti-FKN antibodies leads to an abrupt decrease in insulin secretion with glucose intolerance in WT mice. Furthermore, in vivo FKN administration leads to increased insulin secretion with improved glucose tolerance in WT mice, but is completely without effect in CX3CR1 KO animals. In vitro, FKN administration directly causes increased insulin secretion in β cell lines, isolated islets and perfused islets, but it is without any effect when CX3CR1 is deleted from the β cells. This led to the conclusion that FKN is a novel potentiator of β cell insulin secretion. This proposal seeks to build on this newly identified FKN/CX3CR1 β cell regulatory system to identify the underlying cellular and molecular mechanisms of FKN-induced insulin secretion. We will also test the hypothesis that long-term FKN treatment will have beneficial effects on glucose metabolism and insulin secretion in a series of hyperglycemic mouse models. In addition, we will test the overall hypothesis that FKN will have beneficial effects on β cell "health". This is based on our current findings that FKN inhibits β cell apoptosis and stimulates the β cell differentiation gene program. Finally, we will test the additional hypothesis that FKN administration in vivo will inhibit the development of atherosclerosis in the LDLR KO mouse model. If the ideas incorporated into this application are supported by the proposed experiments, then this would strongly support the concept that a FKN-based biotherapeutic could be administered in vivo to potentiate glucose stimulated insulin secretion in man. This therapeutic strategy could be used for the treatment of patients with Type 2 diabetes mellitus to augment their ability to secrete insulin in response to nutrients and other stimuli and to prevent the decline in β cell mass which characterizes this disease. This would lead to improved glycemic control adding a new component in our therapeutic armamentarium for the treatment of this widespread disease.
描述(由适用提供):在过去的几十年中,2型糖尿病的患病率在美国和全球范围内急剧上升,现在已经达到了流行比例。该疾病的病因既涉及胰岛素抵抗和β细胞功能的增加,并且通常需要两个缺陷(2个命中假设)才能发展出完整的高血糖糖尿病状态。当前的抗糖尿病治疗可用,但 我们最近的工作导致了这样的发现,即通过通过其同源受体CX3CR1发出信号传导的β细胞中的分子碱(FKN)(CX3CL1),从而导致葡萄糖,精氨酸和GLP-1刺激胰岛素分泌增强,并在肥胖症和糖尿病小鼠模型中促进了胰岛素的分泌,并显着改善了葡萄糖。这是由于胰岛素分泌减少,CX3CR1 KO小鼠是葡萄糖不耐受的。此外,通过抗FKN抗体的给药中和循环FKN的中和导致WT小鼠中葡萄糖intlerance的胰岛素分泌突然降低。此外,体内FKN的给药会导致胰岛素分泌增加,并提高WT小鼠的葡萄糖耐量,但在CX3CR1 KO动物中完全没有影响。体外,FKN给药直接导致β细胞系,分离的胰岛和 灌注胰岛,但是当从β细胞中删除CX3CR1时,它没有任何影响。这导致了一个结论,即FKN是β细胞胰岛素分泌的新型潜力。该建议旨在基于这种新确定的FKN/CX3CR1β细胞调节系统,以鉴定FKN诱导的胰岛素分泌的潜在细胞和分子机制。我们还将检验以下假设:在一系列高血糖小鼠模型中,长期FKN治疗将对葡萄糖代谢和胰岛素分泌具有有益作用。此外,我们将检验总体假设,即FKN将对β细胞“健康”产生有益的影响。这是基于我们目前的发现,即FKN抑制β细胞凋亡并刺激β细胞分化基因程序。 最后,我们将测试以下假设:在LDLR KO小鼠模型中,体内施用FKN将抑制动脉粥样硬化的发展。如果拟议的实验支持将其纳入本应用的想法,那么这将强烈支持以下概念:基于FKN的生物疗法可以在体内给药,以在人类中潜在的葡萄糖刺激的胰岛素分泌。该理论策略可用于治疗2型糖尿病患者,以增强其对养分和其他刺激的秘密胰岛素的能力,并防止表征这种疾病的β细胞肿块下降。这将导致血糖控制的改善,从而在我们的治疗性武器库中增加一个新成分,以治疗这种宽度疾病。

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(1)

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

jerrold Michael OLEFSKY其他文献

jerrold Michael OLEFSKY的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('jerrold Michael OLEFSKY', 18)}}的其他基金

Effects of Fractalkine on Beta Cell Function
Fractalkine 对 β 细胞功能的影响
  • 批准号:
    9332367
  • 财政年份:
    2014
  • 资助金额:
    $ 38.75万
  • 项目类别:
Effects of Fractalkine on Beta Cell Function
Fractalkine 对 β 细胞功能的影响
  • 批准号:
    9109627
  • 财政年份:
    2014
  • 资助金额:
    $ 38.75万
  • 项目类别:
Role of Inflammation and Insulin Resistance in Mouse Models of Breast Cancer
炎症和胰岛素抵抗在小鼠乳腺癌模型中的作用
  • 批准号:
    8072501
  • 财政年份:
    2011
  • 资助金额:
    $ 38.75万
  • 项目类别:
Molecular Mechanisms of Inflammation, Steatosis and Hepatic Insulin Resistance
炎症、脂肪变性和肝胰岛素抵抗的分子机制
  • 批准号:
    8053109
  • 财政年份:
    2010
  • 资助金额:
    $ 38.75万
  • 项目类别:
INSULIN RECEPTORS AND THE GLUCOSE TRANSPORT SYSTEM
胰岛素受体和葡萄糖转运系统
  • 批准号:
    8004368
  • 财政年份:
    2010
  • 资助金额:
    $ 38.75万
  • 项目类别:
Molecular Mechanisms of Inflammation, Steatosis and Hepatic Insulin Resistance
炎症、脂肪变性和肝胰岛素抵抗的分子机制
  • 批准号:
    8152191
  • 财政年份:
    2010
  • 资助金额:
    $ 38.75万
  • 项目类别:
PROJECT 2 - METABOLIC CONTROL OF REPRODUCTION
项目 2 - 生殖代谢控制
  • 批准号:
    7683482
  • 财政年份:
    2009
  • 资助金额:
    $ 38.75万
  • 项目类别:
Diabetes Endocrinology Research Center
糖尿病内分泌研究中心
  • 批准号:
    7980520
  • 财政年份:
    2009
  • 资助金额:
    $ 38.75万
  • 项目类别:
Aipocyte/Macrophage Crosstalk in the Etiology of Insulin Resistance.
胰岛素抵抗病因学中的脂细胞/巨噬细胞串扰。
  • 批准号:
    8472481
  • 财政年份:
    2007
  • 资助金额:
    $ 38.75万
  • 项目类别:
Functional Char. of Pro-Inflammatory Pathways Influencing Insulin Influencing Ins
功能特性
  • 批准号:
    7249790
  • 财政年份:
    2007
  • 资助金额:
    $ 38.75万
  • 项目类别:

相似国自然基金

低蛋白日粮脂肪和蛋白质互作影响氨基酸消化率的机制
  • 批准号:
    32302793
  • 批准年份:
    2023
  • 资助金额:
    30 万元
  • 项目类别:
    青年科学基金项目
关键非催化氨基酸残基影响新型GH43家族双功能酶底物特异性的机制研究
  • 批准号:
    32301052
  • 批准年份:
    2023
  • 资助金额:
    30.00 万元
  • 项目类别:
    青年科学基金项目
影响植物磷砷选择性吸收关键氨基酸位点的挖掘及分子机制研究
  • 批准号:
    42307009
  • 批准年份:
    2023
  • 资助金额:
    30 万元
  • 项目类别:
    青年科学基金项目
RET基因634位点不同氨基酸改变对甲状腺C细胞的影响与机制研究
  • 批准号:
    82370790
  • 批准年份:
    2023
  • 资助金额:
    49.00 万元
  • 项目类别:
    面上项目

相似海外基金

Oxidative Stress and Mitochondrial Dysfunction in Chemogenetic Heart Failure
化学遗传性心力衰竭中的氧化应激和线粒体功能障碍
  • 批准号:
    10643012
  • 财政年份:
    2023
  • 资助金额:
    $ 38.75万
  • 项目类别:
Stabilizing the tripartite synaptic complex following TBI
TBI 后稳定三方突触复合体
  • 批准号:
    10844877
  • 财政年份:
    2023
  • 资助金额:
    $ 38.75万
  • 项目类别:
Shifting paradigms to emerging toxins in freshwater cyanobacterial blooms
淡水蓝藻水华中新出现的毒素的范式转变
  • 批准号:
    10912318
  • 财政年份:
    2023
  • 资助金额:
    $ 38.75万
  • 项目类别:
Role of Creatine Metabolism in Necrotizing Enterocolitis
肌酸代谢在坏死性小肠结肠炎中的作用
  • 批准号:
    10724729
  • 财政年份:
    2023
  • 资助金额:
    $ 38.75万
  • 项目类别:
Protein tyrosine phosphatase non-receptor 14 in vascular stability and remodeling
蛋白酪氨酸磷酸酶非受体 14 在血管稳定性和重塑中的作用
  • 批准号:
    10660507
  • 财政年份:
    2023
  • 资助金额:
    $ 38.75万
  • 项目类别:
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了