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T Cell Phenotype and T Cell Receptor Repertoire in Patients with Major Depressive Disorder.

TitleT Cell Phenotype and T Cell Receptor Repertoire in Patients with Major Depressive Disorder.
Publication TypeJournal Article
Year of Publication2018
AuthorsPatas, K., Willing A., Demiralay C., Engler J. Broder, Lupu A., Ramien C., Schäfer T., Gach C., Stumm L., Chan K., Vignali M., Arck P. C., Friese M. A., Pless O., Wiedemann K., Agorastos A., & Gold S. M.
JournalFront Immunol
Date Published2018
KeywordsAdult, Case-Control Studies, Cross-Sectional Studies, Depressive Disorder, Major, Female, Humans, Male, Middle Aged, Neuroimmunomodulation, Phenotype, Receptors, Antigen, T-Cell, T-Lymphocyte Subsets, T-Lymphocytes

While a link between inflammation and the development of neuropsychiatric disorders, including major depressive disorder (MDD) is supported by a growing body of evidence, little is known about the contribution of aberrant adaptive immunity in this context. Here, we conducted in-depth characterization of T cell phenotype and T cell receptor (TCR) repertoire in MDD. For this cross-sectional case-control study, we recruited antidepressant-free patients with MDD without any somatic or psychiatric comorbidities ( = 20), who were individually matched for sex, age, body mass index, and smoking status to a non-depressed control subject ( = 20). T cell phenotype and repertoire were interrogated using a combination of flow cytometry, gene expression analysis, and next generation sequencing. T cells from MDD patients showed significantly lower surface expression of the chemokine receptors CXCR3 and CCR6, which are known to be central to T cell differentiation and trafficking. In addition, we observed a shift within the CD4 T cell compartment characterized by a higher frequency of CD4CD25CD127 cells and higher mRNA expression in purified CD4 T cells obtained from patients with MDD. Finally, flow cytometry-based TCR Vβ repertoire analysis indicated a less diverse CD4 T cell repertoire in MDD, which was corroborated by next generation sequencing of the TCR β chain CDR3 region. Overall, these results suggest that T cell phenotype and TCR utilization are skewed on several levels in patients with MDD. Our study identifies putative cellular and molecular signatures of dysregulated adaptive immunity and reinforces the notion that T cells are a pathophysiologically relevant cell population in this disorder.

Alternate JournalFront Immunol
PubMed ID29515587
PubMed Central IDPMC5826233


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