ArticleNpj mental health research2026
Exploratory characterization of gut microbiota and cognitive profiles in adolescents with subthreshold depression: a shotgun metagenomics sequencing study.
Article in Npj mental health research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Subthreshold depression (SD) in adolescents is a prevalent condition associated with significant functional impairment and an increased risk of developing major depressive disorder. Currently, the lack of reliable objective markers complicates its accurate identification. Investigating the gut microbiome may offer novel insights into its underlying mechanisms. This study aimed to investigate the association between gut microbiome and cognitive function in adolescents with subthreshold Depression (SD). Thirty-eight adolescents with SD and 139 clinically-well (CW) adolescents were recruited. Gut microbiome and cognitive function were assessed by metagenomic sequencing and the MATRICS Consensus Cognitive Battery (MCCB), respectively. Compared with the CW adolescents, the SD group showed higher relative abundance of Spirochaetes, Synergistetes, Spirochaetia, Synergistia, Spirochaetales, Rhizobiales, Synergistales, Thermoanaerobacterales, Rhodospirillales, Synergistaceae, and Oxalobacteraceae at four levels. The Spatial Span scores were higher in the SD group compared to the CW group. Moreover, EggNOG analyses showed a significant negative correlation of the intracellular trafficking secretion, and vesicular transport with the Spatial Span scores. The KEGG pathway of the neurodegenerative diseases and translation was depleted in the microbiome of adolescents with SD. The higher abundance of Spirochaetes, Spirochaetia, and Spirochaetales was the best predictor of SD in adolescents. Our findings suggest that gut microbiome abnormalities, depressive symptoms, and cognitive influences co-occur in adolescents with SD, which may play a crucial role in the pathogenesis of SD and cognitive function in adolescent. Gut microbiome may serve as a potential biomarker for the identification and treatment of adolescents with SD.
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