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Enhancement of Membrane B7-H3 Costimulatory Molecule but Reduction of Its Soluble Form in Multiple Sclerosis

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Abstract

Purpose

Multiple sclerosis (MS) is an autoimmune disease of the central nervous system mediated by T cells. B7-H3 plays a diverse role in regulating T cell responses. However, its expression and clinical significance in MS are not well known. This study analyzed the expression of membrane B7-H3 (mB7-H3) and levels of soluble B7-H3 (sB7-H3) in MS patients to determine its clinical significance.

Methods

Peripheral blood (PB) or cerebrospinal fluid (CSF) samples from healthy controls, other noninflammatory neurological disorders, viral encephalitis, and MS patients were collected. Expression of mB7-H3 on immune cells was detected by flow cytometry. Levels of sB7-H3 in serum or CSF samples were measured by ELISA.

Results

mB7-H3 expression was up-regulated in CSF from MS patients compared to PB (p < 0.001). However, serum or CSF levels of sB7-H3 in MS patients were significantly lower than those in controls (p < 0.05). Relapsing-MS patients had higher CSF mB7-H3 expression than the remitting subgroup. Relapsing-MS patients had decreased serum and CSF sB7-H3 levels compared with the remitting subgroup. Neurological deficits showed negative correlations with serum or CSF sB7-H3 levels, but a positive correlation with CSF mB7-H3 expression. Methylprednisolone therapy significantly elevated sB7-H3 levels and reduced mB7-H3 expression compared with pre-therapy levels. sB7-H3 levels did not correlate with mB7-H3 expression.

Conclusions

We demonstrated enhanced mB7-H3 expression and reduced sB7-H3 levels in MS patients which correlated with the clinical characteristics of MS patients. These results suggest that B7-H3 may be a promising biomarker and associated with the pathogenesis of MS.

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Abbreviations

MS:

Multiple sclerosis

CNS:

Central nervous system

B7-H3R:

B7-H3 receptor

mB7-H3:

membrane B7-H3

sB7-H3:

soluble B7-H3

PB:

Peripheral blood

CSF:

Cerebrospinal fluid

HC:

Healthy controls

OND:

Other noninflammatory neurological disorders

VE:

Viral encephalitis

EDSS:

Expanded Disability Status Scale

ELISA:

Enzyme-linked immunosorbent assay

MFI:

Mean fluorescence intensity

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Acknowledgments

This study was supported by the National Natural Science Foundation of China (Grants: 81001337, 30930085, 31170834 and 30801023), the Research and Innovation Project for College Graduates of Jiangsu Province (Grant: CXLX11_0077), Scientific Project of Jiangsu Health Department (Grant: H200961) and Science and Technology Support Program of Suzhou City (Grant: SS201246).

Conflict of interest

The authors declare that they have no conflict of interest.

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Correspondence to Xueguang Zhang or Qun Xue.

Additional information

Juean Jiang and Jianhua Jiang contributed equally to the manuscript.

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Jiang, J., Jiang, J., Liu, C. et al. Enhancement of Membrane B7-H3 Costimulatory Molecule but Reduction of Its Soluble Form in Multiple Sclerosis. J Clin Immunol 33, 118–126 (2013). https://doi.org/10.1007/s10875-012-9800-2

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  • DOI: https://doi.org/10.1007/s10875-012-9800-2

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