Decrease in CD4+CD25+ and CD8+CD28+ T cells in interstitial pneumonitis associated with rheumatic disease.
The expression of CD25 or CD28 on T cells was examined in patients with rheumatic diseases associated with interstitial pneumonitis (IP), in order to investigate the conditions of CD4+CD25+ regulatory T cells and CD8+CD28- suppressor T cells. Fifty-five patients with various rheumatic diseases and 23 normal controls were enrolled. CD4+CD25+ T cells of patients with IP were significantly decreased in comparison with non-IP patients, and the ratio of CD8+CD28- T cells in patients with IP was significantly higher than that in non-IP patients or normal controls. These results for CD8+CD28- T cells were in accord with the decrease in CD8+CD28+ T cells, and may be related to activation-induced CD8+CD28+ T-cell death. Thus, the abnormality of CD4+CD25+ regulatory T cells may be related to the pathogenesis of IP, and the survival and activation of CD8+ T cells.
Department of Internal Medicine and Rheumatology, School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
Akira
A
Katagiri
Shinji
S
Morimoto
Yutaka
Y
Nakiri
Souichiro
S
Nakano
Akiko
A
Mitsuo
Jun
J
Suzuki
Hirofumi
H
Amano
Kazuhisa
K
Nozawa
Masanao
M
Asano
Yoshiaki
Y
Tokano
Hiroshi
H
Hashimoto
Yoshinari
Y
Takasaki
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001772:Blood Cell Count; D018106:CD28 Antigens / Q000378:metabolism; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology* / Q000378:metabolism; D005260:Female; D006801:Humans; D053645:Interleukin-2 Receptor alpha Subunit / Q000378:metabolism; D017563:Lung Diseases, Interstitial / Q000097:blood / Q000150:complications / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D012216:Rheumatic Diseases / Q000150:complications / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology* / Q000378:metabolism; D055815:Young Adult
D018106:CD28 Antigens; D053645:Interleukin-2 Receptor alpha Subunit