Volume 1 Supplement 1

Fourth International Synovitis Workshop

Open Access

Biologic Aspects of Nurse-Like Cells Found in Bone Marrow and Synovial Tissue of Rheumatoid Arthritis Patients

  • Takahiro Ochi1
Arthritis Research & Therapy19991(Suppl 1):S20

DOI: 10.1186/ar34

Published: 15 November 1999

Full text

Using collagen-induced arthritis (CIA) rats, we studied the origin of synovial stromal cells, which rapidly appeared and proliferated in joints at the onset of inflammatory polyarthritis, we partially labelled the bone marrow stromal cells (BMSC) with fluorescent dye or 3H-Tdr,and analyzed the migration of labelled BMSC after the immunization with collagen. At the onset of CIA, BMSC migrated through small canals from the bone marrow into the affected joint cavities and seemed to contribute to synovial proliferation in joints [4].

Based on the data above, we were interested in establishing and characterizing the nurse cell-like stromal cells (NCs) in bone marrow (RA-BMNC) as well as those in synovial tissue of rheumatoid arthritis (RA) patients (RA-SNC). RA-BMNC showed the characteristic cell-cell contact with lymphocytes (pseudoempeliporesis), resulting in mutual biologic activation, such as maintaining infiltrating lymphocytes and producing large amount of cytokines. Those were very similar to the reactions of RA-SNC reported in our latest paper [2].

Another point of interest was whether NCs could invade the bone, resulting in erosive changes characteristically observed in RA patients. Although NCs (both RA-SNC and RA-BMNC) were shown to produce IL-6, IL-8, and other cytokines, these were not thought to contribute directly to bone erosion. By co-culturing NCs with lymphocytes, we found activation in the production of MMP-1 and MMP-3, and in the expression of mRNA of both MMP-9 and cathepsin-K. Thus, NCs could be thought to contribute directly to bone erosion in RA patients.

Authors’ Affiliations

(1)
Osaka University Medical School

References

  1. Tomita T, Ochi T, et al: Establishment of nurse-like stromal cells from bone marrow of patients with rheumatoid arthritis: indication of characteristic bone marrow microenvironment in patients with rheumatoid arthritis. Rheumatology. 1999Google Scholar
  2. Takeuchi E, Ochi T, et al: Establishment and characterization of nurse cell-like stromal cell lines from synovial tissues of patients with rheumatoid arthritis. Arthritis Rheum. 1999Google Scholar
  3. Wakisaka S, Ochi T, et al: Possible correction of abnormal rheumatoid arthritis synovial cell function by jun D transfection in vivo. Arthritis Rheum. 1998, 41: 470-481. 10.1002/1529-0131(199803)41:3<470::AID-ART14>3.3.CO;2-F.PubMedView ArticleGoogle Scholar
  4. Nakagawa S, Ochi T, et al: Bone marrow stromal cells contribute to synovial cell proliferation in rats with collagen Induced arthritis. J Rheumatol. 1996, 23: 2098-2103.PubMedGoogle Scholar
  5. Hirohata S, Ochi T, et al: Accelerated generation of CD14+monocyte-lineage cells from the bone marrow of rheumatoid arthritis patients. Arthritis Rheum. 1996, 39: 836-843.PubMedView ArticleGoogle Scholar
  6. Tomita T, Ochi T, et al: Phenotypic characteristics of bone marrow cells in patients with rheumatoid arthritis. J Rheumatol. 1994, 21: 1608-1614.PubMedGoogle Scholar

Copyright

© Current Science Ltd 2000

Advertisement