Abstract:
:Nonhematopoietic stromal cells contribute to the organization and homeostasis of secondary lymphoid organs by producing cytokines and chemokines. The development and maintenance of these stromal cells are thought to be regulated by innate immune cells. Indeed, we recently showed that signal regulatory protein α (SIRPα)-positive dendritic cells (DCs) are essential for the proliferation and survival of podoplanin (Pdpn)-positive fibroblastic reticular cells (FRCs) in mouse spleen. We have now established an in vitro culture system for lymph node stromal cells (LNSCs) isolated from mouse peripheral LNs. Activated DCs and TNF-α each promoted the proliferation of cultured LNSCs, most of which were found to be Pdpn+ FRCs. Furthermore, ablation of SIRPα in CD11c+ cells attenuated this effect of DCs on LNSC proliferation. Transplantation of activated DCs together with cultured LNSCs into the renal subcapsular space markedly increased the number of ER-TR7+ stromal cells as well as induced the accumulation of T cells and increased the expression of Ccl19 in the transplants. Ablation of SIRPα in CD11c+ cells greatly impaired the development of LN-like structure in the transplants. Our findings thus suggest that SIRPα+ DCs are important for the proliferation and differentiation of Pdpn+ FRCs in peripheral LNs.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Komori S,Saito Y,Respatika D,Nishimura T,Kotani T,Murata Y,Matozaki Tdoi
10.1002/eji.201948103subject
Has Abstractpub_date
2019-09-01 00:00:00pages
1364-1371issue
9eissn
0014-2980issn
1521-4141journal_volume
49pub_type
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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