...
首页> 外文期刊>Respirology : >Effects of Th2 pulmonary inflammation in mice with bleomycin-induced pulmonary fibrosis.
【24h】

Effects of Th2 pulmonary inflammation in mice with bleomycin-induced pulmonary fibrosis.

机译:Th2肺部炎症对博来霉素诱导的肺纤维化小鼠的影响。

获取原文
获取原文并翻译 | 示例
           

摘要

BACKGROUND AND OBJECTIVE: Leucocytes, especially lymphocytes and neutrophils, as well as alveolar macrophages, that infiltrate into the lung are involved in the development of pulmonary fibrosis. However, the role of T helper (Th)2-type inflammation, mediated by Th2 cells and eosinophils, in fibrosis remains unknown. Transgenic mice deficient in the transcriptional repressor, Bcl6, display an attenuation of Th2 cytokine production. We studied the effects of Th2-type pulmonary inflammation on bleomycin-induced pulmonary fibrosis using Bcl6 transgenic mice. METHODS: Bleomycin was administered to ovalbumin (OVA)-sensitized Bcl6 transgenic and wild-type mice by intratracheal instillation during sequential OVA antigen challenge. Concentrations of transforming growth factor-beta1 in the BAL fluid were measured 2 weeks after bleomycin administration. At the same time lung tissue was examined histopathologically, and homogenized to assess collagen levels and Th1/Th2 cytokine mRNA expression. RESULTS: Although OVA-sensitized, bleomycin-treated Bcl6 transgenic mice had markedly lower numbers of eosinophils in both BAL and lung tissue compared with OVA-sensitized, bleomycin-treated wild-type mice, the development of pulmonary fibrosis in response to bleomycin was similar in Bcl6 transgenic mice and wild-type mice. CONCLUSION: These results suggest that Th2-dominant inflammation in the lung is not essential for the development of bleomycin-induced pulmonary fibrosis.
机译:背景与目的:渗透到肺中的白细胞,特别是淋巴细胞和嗜中性粒细胞,以及肺泡巨噬细胞,都参与了肺纤维化的发展。然而,由Th2细胞和嗜酸性粒细胞介导的T辅助(Th)2型炎症在纤维化中的作用仍然未知。缺乏转录阻遏物Bcl6的转基因小鼠显示Th2细胞因子产生减弱。我们使用Bcl6转基因小鼠研究了Th2型肺部炎症对博来霉素诱导的肺纤维化的影响。方法:在连续的OVA抗原攻击过程中,通过气管内滴注将卵霉素给予卵清蛋白(OVA)致敏的Bcl6转基因和野生型小鼠。博来霉素给药2周后,测定BAL液中转化生长因子β1的浓度。同时,对肺组织进行组织病理学检查,并进行均质化以评估胶原蛋白水平和Th1 / Th2细胞因子mRNA表达。结果:尽管与OVA敏化,博莱霉素处理的野生型小鼠相比,经OVA敏化,博莱霉素处理的Bcl6转基因小鼠在BAL和肺组织中的嗜酸性粒细胞数量明显减少,但是响应博来霉素的肺纤维化发展相似在Bcl6转基因小鼠和野生型小鼠中。结论:这些结果表明,肺部Th2占主导地位的炎症对于博来霉素诱导的肺纤维化的发展不是必需的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号