Increased Frequency of CD4+ Follicular Helper T and CD8+ Follicular T Cells in Human Lymph Node Biopsies during the Earliest Stages of Rheumatoid Arthritis

Dornatien Chuo Anang, Tamara H. Ramwadhdoebe, Janine S. Hähnlein, Bo van Kuijk, Noortje Smits, Krijn P. van Lienden, Mario Maas, Daniëlle M. Gerlag, Paul P. Tak, Niek de Vries, Lisa G. M. van Baarsen

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

Abstract

Follicular T helper cells (Tfh cells) provide key B-cell help and are essential in germinal center formation and (auto) antibody generation. To gain more insight into their role during the earliest phase of rheumatoid arthritis (RA), we analyzed their frequencies, phenotypes, and cytokine profiles in peripheral blood and lymph node biopsies of healthy controls (HCs), autoantibodypositive individuals at risk for developing RA (RA-risk individuals), and early RA patients. Subsequently, we confirmed their presence in lymph nodes and synovial tissue of RA patients using immunofluorescence microscopy. In the blood, the frequency of Tfh cells did not differ between study groups. In lymphoid and synovial tissues, Tfh cells were localized in B-cell areas, and their frequency correlated with the frequency of CD19+ B cells. Compared to lymphoid tissues of healthy controls, those of RA patients and RA-risk individuals showed more CD19+ B cells, CD4+CXCR5+ follicular helper T cells, and CD8+CXCR5+ follicular T cells. These Tfh cells produced less IL-21 upon ex vivo stimulation. These findings suggest that Tfh cells may present a novel rationale for therapeutic targeting during the preclinical stage of RA to prevent further disease progression.
Original languageEnglish
Article number1104
JournalCells
Volume11
Issue number7
DOIs
Publication statusPublished - 1 Apr 2022

Keywords

  • B lymphocytes
  • Follicular T helper cells
  • Lymph nodes
  • Rheumatoid arthritis
  • T lymphocytes

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