Association of T-zone reticular networks and conduits with ectopic lymphoid tissues in mice and humans.

Association of T-zone reticular networks and conduits with ectopic lymphoid tissues in mice and humans.
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DOI:
10.1016/j.ajpath.2010.12.039
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发表时间:
2011-04
影响因子:
6
通讯作者:
Luther, Sanjiv A.
Luther, Sanjiv A.
中科院分区:
医学2区
文献类型:
--
作者:
Link, Alexander;Hardie, Debbie L.;Favre, Stephanie;Britschgi, Mirjam R.;Adams, David H.;Sixt, Michael;Cyster, Jason G.;Buckley, Christopher D.;Luther, Sanjiv A.

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异位或三级淋巴组织(TLT)通常在慢性炎症部位诱导产生。它们通常含有各种造血细胞类型、高内皮微静脉和滤泡树突细胞;并组织成类似淋巴结的结构。尽管成纤维细胞基质细胞可能在 TLT 诱导和持久性中发挥作用,但它们的定义仍然不明确。在此,我们报道小鼠和人类多种组织(例如胰腺、肾、肝和唾液腺)炎症期间产生的 TLT 含有由足平蛋白 + T 区成纤维网状细胞(TRC)组成的基质细胞网络,与滤泡树突细胞不同。与淋巴结类似,TRC 存在于富含 T 细胞的区域,并具有与之相关的树突状细胞。它们表达淋巴毒素 (LT) β 受体 (LTβR),产生 CCL21,并形成功能性导管系统。在大鼠胰岛素启动子-CXCL13-转基因胰腺中,TRC网络和导管的维持部分依赖于LTβR和表达LTβR配体的淋巴组织诱导细胞。总之,TRC 和导管是小鼠和人类次级淋巴器官和发育良好的 TLT 的标志,并且可能充当 T 细胞丰富区的重要支架和组织细胞。
Ectopic or tertiary lymphoid tissues (TLTs) are often induced at sites of chronic inflammation. They typically contain various hematopoietic cell types, high endothelial venules, and follicular dendritic cells; and are organized in lymph node–like structures. Although fibroblastic stromal cells may play a role in TLT induction and persistence, they have remained poorly defined. Herein, we report that TLTs arising during inflammation in mice and humans in a variety of tissues (eg, pancreas, kidney, liver, and salivary gland) contain stromal cell networks consisting of podoplanin+ T-zone fibroblastic reticular cells (TRCs), distinct from follicular dendritic cells. Similar to lymph nodes, TRCs were present throughout T-cell–rich areas and had dendritic cells associated with them. They expressed lymphotoxin (LT) β receptor (LTβR), produced CCL21, and formed a functional conduit system. In rat insulin promoter–CXCL13–transgenic pancreas, the maintenance of TRC networks and conduits was partially dependent on LTβR and on lymphoid tissue inducer cells expressing LTβR ligands. In conclusion, TRCs and conduits are hallmarks of secondary lymphoid organs and of well-developed TLTs, in both mice and humans, and are likely to act as important scaffold and organizer cells of the T-cell–rich zone.
树突状细胞对于维持流感病毒感染小鼠肺部的三级淋巴结构至关重要。
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