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Comparison of the Percentage of Regulatory T Cells and Their P-Stat5 Expression in Allergic and Non-Allergic Common Variable Immunodeficiency Patients Publisher Pubmed



Sadati ZA1 ; Motedayyen H2 ; Sherkat R1 ; Ostadi V1 ; Eskandari N1
Authors

Source: Immunological Investigations Published:2019


Abstract

Background: Common Variable Immunodeficiency (CVID) is a primary immunodeficiency characterized by an immunologic deficiency in immunoglobulin production. Regulatory T cells (Tregs) play a key role in preventing the development allergic disorders. p-STAT5 is a known factor for the function and survival of Tregs. This study aimed to investigate the number of Tregs and their p-STAT5 expression in allergic and non-allergic CVID patients. Methods: Peripheral blood mononuclear cells (PBMCs) were isolated from 10 healthy volunteers, 10 allergic patients, and 16 CVID patients (allergic and non-allergic) using Ficoll density centrifugation. The percentage of Tregs in PBMCs was analyzed by flow cytometry. Tregs were also isolated from participants using an immunomagnetic separation method and p-STAT5 expression was evaluated in Tregs using flow cytometry. Results: The results revealed that Treg percentage was significantly lower in the CVID patients than the control groups (healthy and allergic individuals) (p<0.001). There was a significant reduction in Treg percentage in allergic patients compared to healthy subjects (p<0.05). No significant difference in Treg percentage between allergic and non-allergic CVID patients was observed. The expression of p-STAT5 in Tregs was significantly lower in CVID patients than the control groups (p<0.001). In addition, the expression of p-STAT5 in Tregs of allergic patients was significantly decreased compared to healthy subjects (p<0.001). However, the deference of p-STAT5 level was not statistically significant between allergic and non-allergic CVID patients. Conclusion: These findings suggest that p-STAT5 signaling defect and decreased Treg number may not participate in the development of allergy in CVID patients. © 2018, © 2018 Taylor & Francis.
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