Olguin-Calderón D, Velásquez-Ortiz MG, Huerta-Robles HMR, López-Herrera G, Segura-Méndez NH, O'Farrill-Romanillos P, Scheffler-Mendoza S, Yamazaki-Nakashimada MA, García-Cruz ML, Espinosa-Padilla SE, Staines-Boone TA, Santos-Argumedo L, Berrón-Ruiz L. Atypical patterns of STAT3 phosphorylation in subpopulations B cells in patients with common variable immunodeficiency.
Hum Immunol 2022;
83:428-436. [PMID:
35177260 DOI:
10.1016/j.humimm.2022.01.013]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 01/09/2022] [Accepted: 01/24/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND
Common Variable Immunodeficiency (CVID) is a heterogeneous disorder characterized by defective B cell differentiation and antibody production. Interleukin (IL)-21 activates STAT3, a potent regulator of B cell differentiation into plasma cells. We have studied the phosphorylation of STAT3 in CVID patients and its contribution to B cells subsets.
METHODS
We studied 23 CVID patients and 14 healthy donors (HD), determining pSTAT3 in naïve and memory B cells, stimulated with IL-21 at 15 and 60 min.
RESULTS
pSTAT3 was increased in total (p = 0.044), naïve (p = 0.023), and memory (p = 0.001) B cells at 60 min in CVID patients compared with HD. We classified patients by the percentage of isotype-switched memory B cells. We observed an increase in pSTAT3 at 60 min in memory B cells in both CVID groups of patients (p = 0.026, p = 0.007, respectively). Interestingly, the analysis of each group individually; demonstrated that patients with decreased memory B cells exhibited an increase in pSTAT3 at 60 min (p = 0.023), while HD had an expected decrease in pSTAT3 (p = 0.045).
CONCLUSION
CVID patients showed an increased atypical of pSTAT3, which could affect the differentiation of B cells. Further studies in the IL-21 pathway are necessary to understand how this alteration could promote differentiation defects in patient B cells.
Collapse