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Diabetologia:胰岛炎或与2型糖尿病胰岛功能紊乱有关

2014-02-10 佚名 不详

2型糖尿病发病机制中包含胰岛素抵抗和胰岛功能紊乱。2型糖尿病病程中的慢性炎症反应不仅可影响胰岛,而且也可影响胰岛素靶器官。然而,2型糖尿病胰岛炎症反应的性质,以及其对2型糖尿病患者胰岛功能的影响尚不清楚。此外,正常人和2型糖尿病患者胰岛中免疫细胞表达情况尚不确定。 为此,来自美国东弗吉尼亚医学院的Galkina教授及其团队进行了一项研究,探讨2型糖尿病患者胰岛中促炎细

2型糖尿病发病机制中包含胰岛素抵抗和胰岛功能紊乱。2型糖尿病病程中的慢性炎症反应不仅可影响胰岛,而且也可影响胰岛素靶器官。然而,2型糖尿病胰岛炎症反应的性质,以及其对2型糖尿病患者胰岛功能的影响尚不清楚。此外,正常人和2型糖尿病患者胰岛中免疫细胞表达情况尚不确定。

为此,来自美国东弗吉尼亚医学院的Galkina教授及其团队进行了一项研究,探讨2型糖尿病患者胰岛中促炎细胞因子的表达和胰岛白细胞组成与胰岛素分泌之间的关系。该研究结果在线发表在2014年01月16日的Diabetologia杂志上。

该研究分析了2型糖尿病与非2型糖尿病器官捐献者的人类胰岛。通过胰腺灌注试验确定葡萄糖刺激第一时相和第二时相胰岛素分泌。使用定量PCR明确炎症指标的表达,并用流式细胞仪分析人类胰岛内的免疫细胞。

研究结果表明,2型糖尿病捐献者的胰岛, 尤其是那些第一时相胰岛素分泌缺失的胰岛,CCL2和TNF-α表达高于正常胰岛。2型糖尿病患者胰岛中CD45+白细胞表达升高,与胰岛素功能较差的胰岛相比,胰岛功能尚可的胰岛中CD45+白细胞有更大幅度的升高,并与ALOX12升高相一致,但与CCL2或TNFα表达无关。2型糖尿病和非糖尿病捐献者胰岛白细胞中都可检测到T淋巴细胞、B淋巴细胞和CD11+细胞表达;但2型糖尿病捐献者胰岛内B淋巴细胞的比例显著增加。

研究提示,胰岛内白细胞总量和促炎介质的升高都与胰岛功能紊乱相关,提示2型糖尿病胰岛功能紊乱的发展过程中存在异质性胰岛炎。而且,2型糖尿病捐献者胰岛B淋巴细胞含量的变化突出适应性免疫反应在胰岛功能紊乱中有潜在的作用。

原始出处

Butcher MJ, Hallinger D, Garcia E, Machida Y, Chakrabarti S, Nadler J, Galkina EV, Imai Y.Association of proinflammatory cytokines and islet resident leucocytes with islet dysfunction in type 2 diabetes.Diabetologia. 2014 Jan 16

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    2014-08-21 智智灵药
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    2015-01-01 baoya
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