Clini Trans Gastroenterology: 噻唑烷二酮在嗜酸性食管炎中具有抗纤维化作用

2020-05-03 MedSci原创 MedSci原创

嗜酸性食管炎(EoE)是T辅助2(Th2)细胞介导的一种疾病,最终会导致器官功能障碍。在早期疾病中,炎症和上皮下纤维化是可逆的,但是在晚期会出现食管僵硬和狭窄,从而导致临床上吞咽困难。

背景及目的: 嗜酸性食管炎(EoE)是T辅助2(Th2)细胞介导的一种疾病,最终会导致器官功能障碍。在早期疾病中,炎症和上皮下纤维化是可逆的,但是在晚期会出现食管僵硬和狭窄,从而导致临床上吞咽困难。当前没有药物治疗干预直接针对食道纤维化。基于噻唑烷二酮(TZD)调节肠道和肝纤维化的能力,在本项研究中研究人员使用原代人食管成纤维细胞测试了TZD的作用以及罗格列酮和吡格列酮的抗纤维化作用。

方法: 研究人员首先在存在或不存在TZD的情况下,使用转化生长因子(TGF)-β1处理从正常食管或EoE食管中分离的原代成纤维细胞,在某些实验中,不使用布地奈德或使用布地奈德进行处理,并通过实时定量PCR和免疫印迹进行分析。进行了人类食管活检的免疫组织化学分析。

结果: 与正常对照组相比,EoE食管活检和食管成纤维细胞表达更高水平的TZD受体,过氧化物酶体增殖物激活受体-γ(PPAR-γ)。Th2细胞因子白介素4(IL-4)可诱导PPAR-γ。TZD优先降低EoE中TGF-β1诱导的肌成纤维细胞和纤维化基因和蛋白质的表达,但不降低正常的食管成纤维细胞。在食管成纤维细胞中,TGF-β1增强了Smad2 / 3和p38的磷酸化,但TZDs优先抑制了p38的磷酸化,提示信号通路特异的作用。在降低胶原蛋白-1α1表达上,TZD比布地奈德更有效。

讨论: TZD在TGF-β1活化的EoE成纤维细胞中优先发挥抗纤维化作用,并为进一步研究TZD在EoE病理重塑中的潜力提供了临床前基础。

原始出处:

Nhu, Quan M. et al. Antifibrotic Effects of the Thiazolidinediones in Eosinophilic Esophagitis Pathologic Remodeling: A Preclinical Evaluation. Clini Trans Gastroenterology.2020.

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    2020-11-14 许安
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    2021-04-06 bsmagic9140
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    2020-05-05 zhouqu_8
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