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28.09.2016 | Original Article | Ausgabe 5-6/2016

Immunologic Research 5-6/2016

CD19+ Tim-1+ B cells are decreased and negatively correlated with disease severity in Myasthenia Gravis patients

Immunologic Research > Ausgabe 5-6/2016
Yong Zhang, Xiuying Zhang, Yan Xia, Xiao Jia, Hao Li, Yanyan Zhang, Zhen Shao, Ning Xin, Mingfeng Guo, Jing Chen, ShuangShuang Zheng, YuZhong Wang, Linlin Fu, Chenghua Xiao, Deqin Geng, Yonghai Liu, Guiyun Cui, Ruiguo Dong, Xiaoyu Huang, Tingyan Yu
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1007/​s12026-016-8872-0) contains supplementary material, which is available to authorized users.
Yong Zhang, Xiuying Zhang and Yan Xia have contributed equally to this work.


T cell immunoglobulin mucin domain-1(Tim-1) was recently identified to be critical and essential for optimal regulatory B cells function in maintaining immune tolerance. We aimed to measure the expression levels of Tim-1 on B cells from patients with Myasthenia Gravis (MG) and to investigate whether the expression of Tim-1 is associated with pathogenesis of MG. A total of 34 patients with MG (18 generalized MG (GMG) and 16 ocular MG (OMG) and 24 healthy donors were recruited in this study. The quantitative myasthenia gravis score (QMGS) was used to evaluate the clinical severity. Real-time PCR and flow cytometry were used to measure the levels of Tim-1 expressed on peripheral B cells. Peripheral CD138+ plasma cells were assayed by flow cytometry. Serum Th17-related cytokines (IL-6, IL-1β and IL-17) and anti-AChR antibody (Ab) titers were tested by enzyme-linked immunosorbent assay (ELISA). Our data demonstrated that the mRNA and protein expression levels of B cell Tim-1 in both the GMG and OMG groups were significantly lower than those in healthy controls, with lower expression in GMG than in OMG. Tim-1 expression on B cells from OMG/GMG was negatively correlated with clinical severity, plasma cells frequency, serum Th17-related cytokines and anti-AChR Ab levels. Our results indicated that aberrant expression of Tim-1 exists on B cells and may contribute to the Th17 polarization and antibody-secreting plasma cells differentiation in MG patients.

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