Am J Resp Crit Care:特发性肺纤维化患者呼吸道微生物与宿主之间存在怎样的相互作用?

2017-01-18 xing.T MedSci原创

宿主的转录组学的综合分析和微生物特征表明对于改变或更丰富的微生物宿主存在一个很明显的宿主反应。并且在纵向随访中这些反应仍然升高,表明下呼吸道的细菌群落可能作为特发性肺纤维化患者重复性肺泡损伤的持续刺激因子。

呼吸道微生物的变化与特发性肺纤维化疾病的进展存在相关,然而宿主对呼吸道微生物的反应仍然是未知的。近日,呼吸内科领域权威杂志Am J Resp Crit上发表了一篇研究文章,研究人员旨在探讨特发性肺纤维化患者中呼吸道微生物与宿主之间的相互作用。

研究人员前瞻性地纳入了60例特发性肺纤维化患者,连同20例匹配的对照者。在研究之初所有受试者均接受了支气管肺泡灌洗(BAL)和采集了外周全血放入到PAXgene管中。对于特发性肺纤维化患者研究人员额外在1、3、6个月和一年(如果还活着)等时间点采集了受试者的样本。研究人员采用Affymetrix人类gene1.1st阵列进行了基因表达谱分析。

研究人员通过基因表达数据的网络分析确定了两个基因模块与特发性肺纤维化的诊断、BAL细菌负荷(通过16S定量PCR来测定)和特定的微生物操作分类单元,以及冲洗和外周血中性粒细胞强烈关联。在这些模块中所涉及宿主防御反应的基因包括NLRC4、pglyrp1、MMP9和DEFA4。该模块还包含两个基因编码的特异性抗菌肽(SLPI和CAMP)。许多这些特定的转录与生存相关,并且在经历疾病进展的患者中呈现纵向表达,进一步加强他们与疾病之间的关系。

宿主的转录组学的综合分析和微生物特征表明对于改变或更丰富的微生物宿主存在一个很明显的宿主反应。并且在纵向随访中这些反应仍然升高,表明下呼吸道的细菌群落可能作为特发性肺纤维化患者重复性肺泡损伤的持续刺激因子。

原始出处:

Philip L Molyneaux , et al. Host-Microbial Interactions in Idiopathic Pulmonary Fibrosis. AM J RESP CRIT> 2017. http://www.atsjournals.org/doi/abs/10.1164/rccm.201607-1408OC

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    2017-01-20 zhmscau
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    2017-01-20 wincls
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    2017-01-20 ylz8405

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