Diabetes:1型糖尿病预防在动物实验中实现

2012-07-04 申静 爱唯医学网

文献标题:Adoptive Transfer of Immunomodulatory M2 Macrophages Prevents Type 1 Diabetes in NOD Mice.期刊来源:Diabetes 2012 Jun 28期刊影响因子:8.286          (医脉通配)      &nbs

文献标题:Adoptive Transfer of Immunomodulatory M2 Macrophages Prevents Type 1 Diabetes in NOD Mice.
期刊来源:Diabetes 2012 Jun 28
期刊影响因子:8.286
1型糖尿病预防在动物实验中实现 
       (医脉通配)

       瑞典卡罗林斯卡研究所的研究人员报告,他们通过对遗传易感小鼠注射专门制备的细胞,阻止了免疫系统对胰腺β细胞的攻击,从而成功预防了1型糖尿病的发生。这项研究发表在《糖尿病》杂志6月28日在线版上。

       巨噬细胞错误攻击胰腺β细胞是1型糖尿病的重要发病机制之一,鉴于免疫细胞之间通过细胞因子进行交流,主要研究者Robert Harris博士及其同事初步研究了参与决定巨噬细胞保护或攻击胰腺β细胞的多种细胞因子。

       在实验中,研究者采用的是非肥胖糖尿病(NOD)小鼠,这类小鼠对1型糖尿病遗传易感,通常在出生后12~30周内发生1型糖尿病。研究者首先培育这些小鼠骨髓中的巨噬细胞,然后用特殊配伍的细胞因子刺激成熟的巨噬细胞。

       当小鼠满16周时,将其分为3组:巨噬细胞经过处理组,注射经过特殊配伍细胞因子处理的巨噬细胞;巨噬细胞未经处理组,注射未经过细胞因子处理的巨噬细胞;对照组,不注射巨噬细胞。然后观察12周,采用一种3D成像技术了解β细胞所受的免疫介导性攻击的程度。结果显示,巨噬细胞经过处理组仅有25%的小鼠发生1型糖尿病,而另两组的发病率高达83%。

       Harris博士指出,他们从小鼠发生临床性糖尿病之前2周才开始实施这种细胞疗法,尽管此时胰腺内仍能产生胰岛素的β细胞已经所剩不多,但该治疗仍能有效保护残存的β细胞而阻止1型糖尿病的发生。“这表明过继转移细胞疗法对1型糖尿病有效,而且这项研究标志着糖尿病预防领域的重要进展。”

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