巨噬细胞和肺微血管内皮细胞对烟曲霉作用的研究

2018-09-03 10:45:22宋珺韩菁孙越
中国医药导报 2018年13期

宋珺 韩菁 孙越

[摘要] 目的 探讨巨噬细胞和肺微血管内皮细胞对烟曲霉作用。 方法 构建小鼠巨噬细胞株J774细胞烟曲霉感染的体外模型和人肺微血管内皮细胞(HPMVECs)烟曲霉感染的体外模型,利用激光共聚焦扫描显微镜观察共培养体系。 结果 J774细胞对烟曲霉具吞噬作用,但在共培养24 h的动态观察中,并未观察到HPMVECs内化烟曲霉,仅观察到烟曲霉的感染导致HPMVECs形态的变化和细胞完整性的破坏。 结论 J774细胞对烟曲霉具吞噬作用,HPMVECs无内化烟曲霉的作用,烟曲霉感染可导致HPMVECs形态的变化和细胞完整性的破坏。

[关键词] 巨噬细胞;肺微血管内皮细胞;烟曲霉

[中图分类号] R563 [文獻标识码] A [文章编号] 1673-7210(2018)05(a)-0018-03

[Abstract] Objective To investigate effect of macrophages and pulmonary microvascular endothelial cells (HPMVECs) on Aspergillus fumigatus. Methods In vitro models of Aspergillus fumigatus-treated HPMVECs and Aspergillus fumigatus-treated J774 cells were established, confocal laser scanning microscope was used for detection of co-cultures. Results Aspergillus fumigatus were phagocyted by J774 cells. However, Aspergillus fumigatus were not internalized by HPMVECs, onlu morphology change and integrity compromise were observed on Aspergillus fumigatus-treated HPMVECs. Conclusion J774 cells phagocytes Aspergillus fumigatus. HPMVECs can't internalize Aspergillus fumigatus. Aspergillus fumigatus can cause morphology change and integrity compromise in HPMVECs.

[Key words] Macrophages; Pulmonary microvascular endothelial cells; Aspergillus fumigatus

在真菌感染中,曲霉菌是仅次于念球菌的重要致病菌[1-2]。导致人类疾病的主要曲霉菌是烟曲霉、黄曲霉和黑曲霉,人类曲霉菌病95%以上为烟曲霉感染引发[1.3]。巨噬细胞属于免疫细胞,在先天性和后天性免疫应答过程中起着关键作用。另外,侵袭性肺曲霉病的主要特征是烟曲霉菌丝侵袭血管。目前,烟曲霉与巨噬细胞(或血管内皮细胞)的相互作用成为学者们普遍关注的研究热点之一[1,4-6]。人肺微血管内皮细胞(HPMVECs)是肺组织的重要细胞,存在于循环血和实质脏器细胞之间,既是构成血管通透性的主要屏障,又是代谢功能复杂的炎症细胞,对维持肺血管的完整性具有特殊意义[7-9]。我们已经完成的研究表明,烟曲霉感染能引发HPMVECs分泌多种促炎因子[10]。然而,烟曲霉感染后,巨噬细胞和HPMVECs对烟曲霉有着何种作用,目前尚不清楚。……

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