Recruitment of CD16+ monocytes into synovial tissues is mediated by fractalkine and CX3CR1 in rheumatoid arthritis patients

Ryusuke Yano, Masahiro Yamamura, Katsue Sunahori, Kouji Takasugi, Jiro Yamana, Masanori Kawashima, Hirofumi Makino

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

CD16+ monocytes, identified as a minor population of monocytes in human peripheral blood, have been implicated in several inflammatory diseases, including rheumatoid arthritis (RA). Fractalkine (FKN, CX3CL1), a member of the CX3 C subfamily, is induced by pro-inflammatory cytokines, while a receptor for FKN, CX3CR1, is capable of mediating both leukocyte migration and firm adhesion. Here, we investigated the role of FKN and CX3CR1 in activation of CD16+ monocytes and their recruitment into synovial tissues in RA patients. High levels of soluble FKN were detected in the synovial fluid and sera of RA patients. Circulating CD16+ monocytes showed a higher level of CX3CR1 expression than CD16- monocytes in both RA patients and healthy subjects. High level expression of CX3CR1 was also seen in CD16 + monocytes localized to the lining layer in RA synovial tissue. In the in vitro culture experiments, IL-10 induced CX3CR1 expression on the surface of monocytes, and TNFα induced membrane-bound FKN as well as soluble FKN expression in synovial fibroblasts. Moreover, soluble FKN was capable of inducing IL-1β and IL-6 by activated monocytes. These results suggest that FKN might preferentially mediate migration and recruitment of CD16+ monocytes, and might contribute to synovial tissue inflammation. Copyright

Original languageEnglish
Pages (from-to)89-98
Number of pages10
JournalActa Medica Okayama
Volume61
Issue number2
Publication statusPublished - Apr 1 2007

Fingerprint

Chemokine CX3CL1
Monocytes
Rheumatoid Arthritis
Tissue
Fibroblasts
Interleukin-1
Linings
Interleukin-10
Interleukin-6
Blood
Adhesion
Chemical activation
Cytokines
Membranes
Fluids
Experiments
Synovial Fluid
Healthy Volunteers
Leukocytes
Inflammation

Keywords

  • CD16
  • CX3CR1
  • Fractalkine
  • Monocytes
  • Rheumatoid arthritis

ASJC Scopus subject areas

  • Medicine(all)
  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Yano, R., Yamamura, M., Sunahori, K., Takasugi, K., Yamana, J., Kawashima, M., & Makino, H. (2007). Recruitment of CD16+ monocytes into synovial tissues is mediated by fractalkine and CX3CR1 in rheumatoid arthritis patients. Acta Medica Okayama, 61(2), 89-98.

Recruitment of CD16+ monocytes into synovial tissues is mediated by fractalkine and CX3CR1 in rheumatoid arthritis patients. / Yano, Ryusuke; Yamamura, Masahiro; Sunahori, Katsue; Takasugi, Kouji; Yamana, Jiro; Kawashima, Masanori; Makino, Hirofumi.

In: Acta Medica Okayama, Vol. 61, No. 2, 01.04.2007, p. 89-98.

Research output: Contribution to journalArticle

Yano, R, Yamamura, M, Sunahori, K, Takasugi, K, Yamana, J, Kawashima, M & Makino, H 2007, 'Recruitment of CD16+ monocytes into synovial tissues is mediated by fractalkine and CX3CR1 in rheumatoid arthritis patients', Acta Medica Okayama, vol. 61, no. 2, pp. 89-98.
Yano R, Yamamura M, Sunahori K, Takasugi K, Yamana J, Kawashima M et al. Recruitment of CD16+ monocytes into synovial tissues is mediated by fractalkine and CX3CR1 in rheumatoid arthritis patients. Acta Medica Okayama. 2007 Apr 1;61(2):89-98.
Yano, Ryusuke ; Yamamura, Masahiro ; Sunahori, Katsue ; Takasugi, Kouji ; Yamana, Jiro ; Kawashima, Masanori ; Makino, Hirofumi. / Recruitment of CD16+ monocytes into synovial tissues is mediated by fractalkine and CX3CR1 in rheumatoid arthritis patients. In: Acta Medica Okayama. 2007 ; Vol. 61, No. 2. pp. 89-98.
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