Application of light sheet microscopy for qualitative and quantitative analysis of bronchus-associated lymphoid tissue in mice.

Application of light sheet microscopy for qualitative and quantitative analysis of bronchus-associated lymphoid tissue in mice.
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DOI:
10.1038/cmi.2017.150
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发表时间:
2018-10
影响因子:
24.1
通讯作者:
Förster R
Förster R
中科院分区:
医学1区
文献类型:
--
作者:
Mzinza DT;Fleige H;Laarmann K;Willenzon S;Ristenpart J;Spanier J;Sutter G;Kalinke U;Valentin-Weigand P;Förster R

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肺部炎症后,支气管相关淋巴组织(BALT)在肺支气管周围不可预测的位置发展。BALT的形成和组成主要是通过免疫组织学来研究的,由于所投资的器官的大小,通常限于有限数量的组织切片。为了评估整个肺的BALT,迫切需要其他方法。在这里,我们介绍了一种新的基于光片显微镜的方法来评估肺内的淋巴组织。利用全肺叶的抗体染色和有机溶剂的光学透明,我们提出了一种方法,可以深入地显示整个支气管树、淋巴管系统和诱导的BALT的免疫细胞组成。此外,通过对整个肺的三维分析,可以定性和定量地计数诱发的BALT。使用这种方法,我们发现,与野生型小鼠(WT)相比,单一鼻腔应用复制缺陷痘病毒MVA可诱导CCR7缺陷小鼠的BALT,其占整个肺体积的8%。此外,与WT小鼠相比,在CXCR5缺陷小鼠中,热灭活大肠杆菌诱导的BALT以明显的T细胞渗透为主。
Bronchus-associated lymphoid tissue (BALT) develops at unpredictable locations around lung bronchi following pulmonary inflammation. The formation and composition of BALT have primarily been investigated by immunohistology that, due to the size of the invested organ, is usually restricted to a limited number of histological sections. To assess the entire BALT of the lung, other approaches are urgently needed. Here, we introduce a novel light sheet microscopy-based approach for assessing lymphoid tissue in the lung. Using antibody staining of whole lung lobes and optical clearing by organic solvents, we present a method that allows in-depth visualization of the entire bronchial tree, the lymphatic vasculature and the immune cell composition of the induced BALT. Furthermore, three-dimensional analysis of the entire lung allows the qualitative and quantitative enumeration of the induced BALT. Using this approach, we show that a single intranasal application of the replication-deficient poxvirus MVA induces BALT that constitutes up to 8% of the entire lung volume in mice deficient in CCR7, in contrast to wild type mice (WT). Furthermore, BALT induced by heat-inactivated E. coli is dominated by a pronounced T cell infiltration in Cxcr5-deficient mice, in contrast to WT mice.
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