Abstract |
Tertiary lymphoid structures (TLSs) in chronic inflammation, including rheumatoid arthritis (RA) synovial tissue (ST), often contain high endothelial venules and follicular dendritic cells (FDCs). Endothelial cell (EC)-specific lymphotoxin β (LTβ) receptor signaling is critical for the formation of lymph nodes and high endothelial venules. FDCs arise from perivascular platelet-derived growth factor receptor β(+) precursor cells (preFDCs) that require specific group 3 innate lymphoid cells (ILC3s) and LTβ for their expansion. Previously, we showed that RA ST contains ECs that express NF-κB-inducing kinase (NIK), which is pivotal in LTβ-induced noncanonical NF-κB signaling. We studied the relation between NIK(+) ECs, (pre)FDCs, and ILC3s with respect to TLSs in RA ST. TLS(+) tissues exhibited a significantly increased expression of genes involved in noncanonical NF-κB signaling, including NIK, and immunohistochemical analysis revealed that NIK was almost exclusively expressed by ECs. ILC3s were present in human RA ST in very low numbers, but not differentially in TLS(+) tissues. In contrast, TLS(+) tissues contained significantly more NIK(+) ECs and perivascular platelet-derived growth factor receptor β(+) preFDCs, which correlated significantly with the quantity of FDCs. We established a strong link between NIK(+) ECs, (pre)FDCs, and the presence of TLSs, indicating that NIK(+) ECs may not only be important orchestrators of lymph node development but also contribute to the formation of TLSs in chronic inflammation.
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Authors | Ae R Noort, Katinka P M van Zoest, Lisa G van Baarsen, Chrissta X Maracle, Boy Helder, Natalie Papazian, Monica Romera-Hernandez, Paul P Tak, Tom Cupedo, Sander W Tas |
Journal | The American journal of pathology
(Am J Pathol)
Vol. 185
Issue 7
Pg. 1935-43
(Jul 2015)
ISSN: 1525-2191 [Electronic] United States |
PMID | 25963989
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2015 American Society for Investigative Pathology. Published by Elsevier Inc. All rights reserved. |
Chemical References |
- LTBR protein, human
- Lymphotoxin beta Receptor
- NF-kappa B
- Protein Serine-Threonine Kinases
- NF-kappa B kinase
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Topics |
- Adult
- Aged
- Arthritis, Rheumatoid
(immunology, metabolism, pathology)
- Endothelial Cells
(enzymology, metabolism)
- Female
- Humans
- Inflammation
- Lymphoid Tissue
(immunology, metabolism, pathology)
- Lymphotoxin beta Receptor
(metabolism)
- Male
- Middle Aged
- NF-kappa B
(metabolism)
- Protein Serine-Threonine Kinases
(genetics, metabolism)
- Signal Transduction
- Synovial Membrane
(immunology, metabolism, pathology)
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