Expression of TLiSA1 on T cells from patients with rheumatoid arthritis and systemic lupus erythematosus.

Abstract

The expression of a new activation antigen, T cell lineage specific activation antigen (TLiSA1) on peripheral blood T cells from 16 rheumatoid arthritis (RA) and 8 systemic lupus erythematosus (SLE) patients and synovial fluid T cells from RA patients was determined in the context of T cell activation. The percentages of TLiSA1 positive T cells from inactive (4.6 +/- 5.2, mean +/- SE) or active RA (19.3 +/- 8.6) or inactive (1.7 +/- 2.1) or active SLE (8.7 +/- 2.7) were significantly increased compared with that of normal controls (0.7 +/- 0.4) (P less than 0.01). All patients with vasculitis showed relatively high positive percentages. The mean fluorocytometric intensity of TLiSA1 positive T cells from RA and SLE patients was significantly higher than that from normals. Percentages of TLiSA1 positive T cells from synovial fluids (21.8 +/- 4.9%) were significantly increased compared with those from peripheral blood of the same patients, indicating the local activation of T cells in patients with RA. An increase in the expression of TLiSA1 with no increase in the expression of the very late activating antigen 1 (VLA-1) was found in peripheral blood from RA, suggesting a difference in the stage of T cell activation in RA. In RA, there was a clinical correlation with levels of TLiSA1 expression on peripheral T cells. After stimulation with PHA, TLiSA1 positive percentages were increased on Day 2 and continued to increase through 5 days of culture. The maximum expression was obtained on Day 5. An increased number of TLiSA1 positive T cells belonged to OKT8. These results suggest that there is the systemic and the local activation of T cells in RA, following antigen stimulation, or a generalized nonspecific activation of immune system that could provide a means to monitor the abnormal immunologic activity in RA.

• Authors: H Tabata, M Hara, A Kitani, T Hirose, K Norioka, M Harigai, K Suzuki, M Kawakami, M Kawagoe, H Nakamura
• Journal: Clinical immunology and immunopathology (Clin Immunol Immunopathol) Vol. 52 Issue 3 Pg. 366-75 (Sep 1989) ISSN: 0090-1229 [Print] United States
• PMID: 2788052 (Publication Type: Comparative Study, Journal Article)

Chemical References

• Antigens, Differentiation, T-Lymphocyte

Topics

• Antigens, Differentiation, T-Lymphocyte (analysis)
• Arthritis, Rheumatoid (immunology)
• Cells, Cultured
• Flow Cytometry
• Humans
• Kinetics
• Lupus Erythematosus, Systemic (immunology)
• Reference Values
• Synovial Fluid (immunology)
• T-Lymphocytes (immunology)