EMBO Mol Med:治疗自体免疫疾病的新药物

2014-10-28 佚名 生物谷

我们的免疫系统保卫我们免受有害细菌和病毒的侵害,但是如果任其发展,摧毁这些入侵者的免疫细胞会导致自体免疫疾病如I型糖尿病或多发性硬化。 一个名为胰岛素一号增长因子(IGF-1)的分子可增强身体对抗这个“误伤“的自然防御能力,研究结果发表在EMBO Molecular Medicine杂志上,研究人员表示新发现是特别令人兴奋的,因为IGF-1已经被FDA批准,这就可以加快IGF-1走上临床试验用

我们的免疫系统保卫我们免受有害细菌和病毒的侵害,但是如果任其发展,摧毁这些入侵者的免疫细胞会导致自体免疫疾病如I型糖尿病或多发性硬化。

一个名为胰岛素一号增长因子(IGF-1)的分子可增强身体对抗这个“误伤“的自然防御能力,研究结果发表在EMBO Molecular Medicine杂志上,研究人员表示新发现是特别令人兴奋的,因为IGF-1已经被FDA批准,这就可以加快IGF-1走上临床试验用于治疗自身免疫疾病。

Daniel Bilbao称:对我来说真正引人注目的是多发性硬化症的存活率,未经处理的动物存活率不到50%,而给予IGF-1治疗动物的存活率超过80%。

自体免疫疾病患者中,一组细胞:促炎T型效应细胞能敏感性识别体内特定的细胞,错误地确定体内特定的细胞为入侵者和攻击它们。如果这个误导攻击靶向产生胰岛素的胰腺细胞,其结果是糖尿病;如果它影响中枢神经系统中髓鞘护套细胞,就会发生多发性硬化症。

促炎T型效应细胞对人体自身细胞的误攻击是由于其他类型的免疫细胞T调节(T-reg)细胞不能正常发挥作用导致的,正如它们的名字所暗示,T-reg细胞能控制T效应细胞,在不需要T效应细胞的时候关闭它们。

研究发现,如果患I型糖尿病和多发性硬化症的小鼠给予IGF-1,它们胰腺和中央神经系统开始生成它们所需要的更多的T-reg细胞,结果疾病得到了抑制。科学家利用从小鼠和人类中所获取的T-reg细胞继续测试IGF-1的作用,确认IGF-1对T-reg细胞具有直接作用,而不是间接地通过一些其它因素诱导T-reg细胞的增殖。

在今年早些时候发表的另一项研究中,Bilbao和Rosenthal曾发现,IGF-1对免疫系统出差错的其他疾病具有相同的效果。他们发现过敏性接触性皮炎小鼠中,IGF-1治疗小鼠后可抑制疾病。

Rosenthal正计划进一步探索IGF-1在炎症的作用,以及其用于治疗诸如肌萎缩、纤维化或心脏疾病的潜能。

原始出处

Pascual-Lucas M1, Viana da Silva S2, Di Scala M3, Garcia-Barroso C1, González-Aseguinolaza G3, Mulle C2, Alberini CM4, Cuadrado-Tejedor M5, Garcia-Osta A6.Insulin-like growth factor 2 reverses memory and synaptic deficits in APP transgenic mice.EMBO Mol Med. 2014 Aug 6

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