Immunophenotypic profile of T cells in common variable immunodeficiency: is there an association with different clinical findings?
Allergol Immunopathol (Madr) 2009;
37:14-20. [PMID:
19268056 DOI:
10.1016/s0301-0546(09)70246-0]
[Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND
A system based on the B-cell phenotype has recently been proposed to classify patients suffering from common variable immunodeficiency (CVID). Immunophenotypic T-cell abnormalities have also been correlated with clinical findings, although they have never been used in classification strategies.
OBJECTIVE
To simultaneously assess T and B-cell subset abnormalities in CVID patients and their relationship with clinical findings. To identify potential immunophenotypic T-cell abnormalities that could be further evaluated in multicenter studies.
PATIENTS AND METHODS
Peripheral blood lymphocytes from 21 CVID patients and 21 healthy donors were stained for T and B-cell subsets, analyzed by flow cytometry, and correlated with clinical characteristics.
RESULTS
Patients classified as MB0 (CD19/CD27+ < 11 %) showed higher percentages of CD4/ CD45RA (87 % vs 67 %, p = 0.028) and lower percentages of CD8/CD45RA+CCR7+ (10 % vs 26 %, p = 0.028) and CD4/CD25+ T-cells (36 % vs 62 %, p = 0.034) than MB2 patients. Even though our cohort was small, we observed a higher prevalence of distinct clinical complications of CVID in patients with B and T-cell abnormalities. Nonmalignant lymphoproliferative disorders and IgG hypercatabolism were more frequently observed in MB0 patients. A higher prevalence of splenomegaly was observed among CVID patients with increased levels of CD4/CD45RA, activated CD4/CD38+DR+, CD8/DR+, and CD8/CD38+ T-cells, as well as in those with lower percentages of CD4/CD45RA+CCR7+ and CD4/CD25+ T-cells. Lymphoproliferative disorders were more prevalent among CVID patients with higher CD4/CD45RA percentages.
CONCLUSION
The study of T-cell subsets warrants further evaluation as a potential tool to better identify CVID patients with distinct clinical profiles.
Collapse