Gastroenterology:IL28可促进小鼠肠炎创伤愈合

2017-04-05 zhangfan MedSci原创

IL28控制结肠炎小鼠IECs增殖系统并且通过激活STAT1促进黏膜愈合,IL28有望成为人类炎症性肠病的治疗药物

研究人员近日在小鼠模型中就白介素28A(IL28A或干扰素λ2)在在肠上皮细胞(IEC)活化,炎症性肠病IBD)及肠黏膜愈合中的作用进行了研究,其结果发表于Gastroenterology。

研究中结肠炎模型使用的小鼠包括6jcrl C57BL/6小鼠(对照),肠上皮细胞的特异性破坏STAT1小鼠(Stat1IEC-KO),干扰素α受体1基因敲除小鼠(Il28ra-/-),干扰素调节因子3基因敲除小鼠(Irf3-/-),与干扰素调节因子3基因的中断或不中断IRF7小鼠(Irf7-/-)。使用高分辨率迷你内镜和体内成像方法,以评估结肠炎进展,并同时对结肠活检和切除组织IBD患者(n = 62)和无结肠炎患者(对照组,n = 23)进行定量PCR分析检测IL28A,IL28RA和其他相关的细胞因子的表达,活检标本采用免疫荧光鉴定IL28生产来源,从患者组织中分离和培养了IEC;STAT1磷酸化测定免疫印迹和共聚焦成像。

结果显示,与对照组比较,在IBD患者和结肠炎小鼠细胞中,结肠黏膜固有层细胞表达增加,IL28R水平在IBD患者和小鼠结肠炎结肠上皮细胞的表达增加;IL28诱导STAT1的磷酸化增加;与对照小鼠相比,Il28ra -/-, Irf3-/-, Irf3-/-Irf7-/-以及Stat1IEC-KO小鼠对葡聚糖硫酸钠引发的结肠炎更敏感,且上皮恢复能力降低;Il28ra-/- and Stat1IEC-KO对恶唑酮引发的严重结肠炎较对照鼠敏感;研究发现IL28诱导的磷酸化(活化)上皮细胞中STAT1,导致其在组织培养增殖。给予结肠创伤小鼠IL28治疗可以促进黏膜愈合。

研究表明,IL28控制结肠炎小鼠IECs增殖系统并且通过激活STAT1促进黏膜愈合,IL28有望成为人类炎症性肠病的治疗药物。

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    2017-09-15 许安
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    2017-04-16 knowheart

    IL28可促进小鼠肠炎创伤愈合

    0

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