Characterization of human fibroblastic reticular cells as potential immunotherapeutic tools



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Valencia Mahón, Jaris and Jiménez, Eva and Martínez, Víctor G. and Amo, Beatriz G. del and Hidalgo, Laura and Entrena Martínez, Ana and Fernández Sevilla, Lidia M. and Río, Francisco del and Varas, Alberto and Vicente, Ángeles and Sacedón, Rosa (2017) Characterization of human fibroblastic reticular cells as potential immunotherapeutic tools. Cytotherapy, 19 . pp. 640-653. ISSN 1465-3249

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Fibroblastic reticular cells (FRCs) are essential players during adaptive immune responses not only as a structural support for the encounter of antigen-presenting cells and naive T lymphocytes but also as a source of modulatory signals. However, little is known about this cell population in humans. To address the phenotypical and functional analysis of human FRCs here we established splenic (SP) and mesenteric lymph node (LN) CD45- CD31- CD90+ podoplanin+ myofibroblastic cell cultures.They shared the phenotypical characteristics distinctive of FRCs, including the expression of immunomodulatory factors and peripheral tissue antigens. Nevertheless, human FRCs also showed particular features, some differing from mouse FRCs, like the lack of nitric oxide synthase (NOS2) expression after interferon (IFN)γstimulation. Interestingly, SP-FRCs expressed higher levels of interleukin (IL)-6, BMP4, CCL2, CXCL12 and Notch molecules, and strongly adapted their functional profile to lipopolysaccharide (LPS), polyinosinic:polycytidylic acid (Poly I:C) and IFNγ stimulation. In contrast, we found higher expression of transforming growth factor (TGF)β and Activin A in LN-FRCs that barely responded via Toll-Like Receptor (TLR)3 and constitutively expressed retinaldehyde dehydrogenase 1 enzyme, absent in SP-FRCs. This study reveals human FRCs can be valuable models to increase our knowledge about the physiology of human secondary lymphoid organs in health and disease and to explore the therapeutic options of FRCs.

Item Type:Article
Uncontrolled Keywords:human fibroblastic reticular cells, immunomodulation, lymph node, spleen
Subjects:Medical sciences > Biology
Medical sciences > Biology > Cytology
ID Code:43852
Deposited On:10 Jul 2017 13:57
Last Modified:11 Jul 2017 08:03

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