Imbalance of T cell immunoregulatory subsets in primary IgA nephropathy.
The peripheral blood distribution of T cell subsets was evaluated in a group of patients with primary IgA nephropathy (IgAN). Results showed that the frequency of helper (CD4+) and suppressor (CD8+) T lymphocytes in IgAN overlapped that seen in healthy blood donors. In addition, the helper T cell subset (CD4+ CDW29+ and CD4+ CD45R+ cells, respectively) proportion was normal, while with particular reference to suppressor T cell subpopulations, a significant decrease of CD8+ CD11+ lymphocytes (the true suppressor cells) was observed in IgAN. These data were further confirmed by the demonstration that monocyte chemotactic responsiveness triggered by lymphocyte-derived chemotactic factor (LDCF), a lymphokine released by CD8+ CD11- cells, was higher in IgAN than in controls. These data suggest that the low frequency of CD8+ CD11+ cells may be responsible for the impaired T cell immunoregulatory activity in patients with IgAN.
Antonaci
S
S
Department of Medical Physiopathology, University of Bari, Italy.
Serlenga
E
E
Garofalo
A R
AR
Colizzi
M
M
Schena
F P
FP
D000328:Adult; D000368:Aged; D002634:Chemotaxis, Leukocyte; D005922:Glomerulonephritis, IGA / Q000276:immunology*; D006801:Humans; D019410:Interleukin-16; D007958:Leukocyte Count; D008222:Lymphokines / Q000276:immunology; D008875:Middle Aged; D009000:Monocytes / Q000276:immunology; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*
D019410:Interleukin-16; D008222:Lymphokines