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Differential gene expression in patients with subsyndromal symptomatic depression and major depressive disorder.

Differential gene expression in patients with subsyndromal symptomatic depression and major depressive disorder.
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Yang C, Hu G, Li Z, Wang Q, Wang X, Yuan C, Wang Z, Hong W, Lu W, Cao L, Chen J, Wang Y, Yu S, Zhou Y, Yi Z, Fang Y,


Yang C, Hu G, Li Z, Wang Q, Wang X, Yuan C, Wang Z, Hong W, Lu W, Cao L, Chen J, Wang Y, Yu S, Zhou Y, Yi Z, Fang Y, (click to view)

Yang C, Hu G, Li Z, Wang Q, Wang X, Yuan C, Wang Z, Hong W, Lu W, Cao L, Chen J, Wang Y, Yu S, Zhou Y, Yi Z, Fang Y,

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PloS one 2017 03 2312(3) e0172692 doi 10.1371/journal.pone.0172692
Abstract
BACKGROUND
Subsyndromal symptomatic depression (SSD) is a subtype of subthreshold depressive and can lead to significant psychosocial functional impairment. Although the pathogenesis of major depressive disorder (MDD) and SSD still remains poorly understood, a set of studies have found that many same genetic factors play important roles in the etiology of these two disorders. Nowadays, the differential gene expression between MDD and SSD is still unknown. In our previous study, we compared the expression profile and made the classification with the leukocytes by using whole-genome cRNA microarrays among drug-free first-episode subjects with SSD, MDD and matched healthy controls (8 subjects in each group), and finally determined 48 gene expression signatures. Based on these findings, we further clarify whether these genes mRNA was different expressed in peripheral blood in patients with SSD, MDD and healthy controls (60 subjects respectively).

METHOD
With the help of the quantitative real-time reverse transcription-polymerase chain reaction (RT-qPCR), we gained gene relative expression levels among the three groups.

RESULTS
We found that there are three of the forty eight co-regulated genes had differential expression in peripheral blood among the three groups, which are CD84, STRN, CTNS gene (F = 3.528, p = 0.034; F = 3.382, p = 0.039; F = 3.801, p = 0.026, respectively) while there were no significant differences for other genes.

CONCLUSION
CD84, STRN, CTNS gene may have significant value for performing diagnostic functions and classifying SSD, MDD and healthy controls.

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