Abstract:
BACKGROUND:Glycosylation is a common posttranslational modification in protein biosynthesis that is implicated in several disease states. It has been reported that specific protein glycan structures are useful as biomarkers for cancer and some neuropsychiatric diseases; however, the relationship between plasma protein glycosylation and major depressive disorder (MDD) has not been investigated to date. The aim of this study was to determine whether plasma protein glycan structures are altered in depression using a stress-based mouse model and samples from patients with MDD. METHODS:We used chronic ultra-mildly stressed mice that were untreated or treated with imipramine as mouse models of depression and remission, respectively. We also made comparisons between samples from depressed and remitted patients with MDD. Protein glycosylation was analyzed using a lectin microarray that included 45 lectins with binding affinities for various glycan structures. RESULTS:Sia-alpha2-6Gal/GalNAc was a commonly altered glycan structure in both depression model mice and patients with MDD. Moreover, the expression of ST6GALNAC2 was decreased in leukocytes from patients with MDD. LIMITATIONS:Our study samples were small and we did not identify specific alpha2-6Gal/GalNAc-sialylated proteins. CONCLUSIONS:The glycan structure Sia-alpha2-6GalNAc in plasma protein and ST6GALNAC2 expression in peripheral leukocytes may have utility as candidate biomarkers for the clinical diagnosis and monitoring of MDD.
journal_name
J Affect Disordjournal_title
Journal of affective disordersauthors
Yamagata H,Uchida S,Matsuo K,Harada K,Kobayashi A,Nakashima M,Higuchi F,Watanuki T,Matsubara T,Watanabe Ydoi
10.1016/j.jad.2017.08.057subject
Has Abstractpub_date
2018-06-01 00:00:00pages
79-85eissn
0165-0327issn
1573-2517pii
S0165-0327(17)31110-2journal_volume
233pub_type
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