Abstract
The intricate processes of microbiota-gut-brain communication in modulating human cognition and emotion, especially in the context of mood disorders, have remained elusive. Here we performed faecal metagenomic, serum metabolomics and neuroimaging studies on a cohort of 109 unmedicated patients with depressed bipolar disorder (BD) patients and 40 healthy controls (HCs) to characterise the microbial-gut-brain axis in BD. Across over 12,000 measured metabolic features, we observed a large discrepancy (73.54%) in the serum metabolome between BD patients and HCs, spotting differentially abundant microbial-derived neuroactive metabolites including multiple B-vitamins, kynurenic acid, gamma-aminobutyric acid and short-chain fatty acids. These metabolites could be linked to the abundance of gut microbiota presented with corresponding biosynthetic potentials, including Akkermansia muciniphila, Citrobacter spp. (Citrobacter freundii and Citrobacter werkmanii), Phascolarctobacterium spp., Yersinia spp. (Yersinia frederiksenii and Yersinia aleksiciae), Enterobacter spp. (Enterobacter cloacae and Enterobacter kobei) and Flavobacterium spp. Based on functional neuroimaging, BD-related neuroactive microbes and metabolites were discovered as potential markers associated with BD-typical features of functional connectivity of brain networks, hinting at aberrant cognitive function, emotion regulation, and interoception. Our study combines gut microbiota and neuroactive metabolites with brain functional connectivity, thereby revealing potential signalling pathways from the microbiota to the gut and the brain, which may have a role in the pathophysiology of BD.
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Data availability
Metagenomic and neuroimaging data have been deposited into the CNGB Sequence Archive (CNSA; https://db.cngb.org/cnsa/) [85] of China National GeneBank DataBase (CNGBdb) [86] with accession number CNP0002003. The datasets generated by this study are available from the corresponding authors upon request.
Code availability
All codes used for data analysis including serum metabolome, gut microbiome and rs-fMRI are available on https://github.com/lizhiming11/BD_project.
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Funding
This study was supported by grants from the National Natural Science Foundation of China (Grant numbers: 81971271 and 81971253), the Zhejiang Provincial Key Research and Development Programme (Grant number: 2021C03107), the Leading Talent of Scientific and Technological Innovation - 'Ten Thousand Talents Programme' of Zhejiang Province (Grant number: 2021R52016), the Zhejiang Provincial Natural Science Foundation (Grant number: LQ20H090013), the Programme from the Health and Family Planning Commission of Zhejiang Province (Grant number: 2020KY548) and Zhong yuan Technological Innovation leading Talents (Grant number: 204200510019).
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S.H., X.S. and J.L. designed the study; Participants were recruited by J.L., P.Z., J.J., H.H., C.X., L.W., X.G., Y.F., D.Z., Y.C., Y.Z., X.Y., X.L. and L.P.; J.L. and P.Z. coordinated the data processing and availability; Data analysis was performed as follows: serum metabolome analysis (Z.L.), gut microbiota analysis (Z.L.) and neuroimaging analysis (J.D.); C.L., S.L., J.L., D.W., H.Z., M.H., H.Z., Y.S., L.W., Y.L., Z.J., S.L., W.Z. and H.Y. facilitated scientific discussion and gave suggestions; S.H., C.N., X.S. and K.K. supervised these activities; Z.L., J.D. and J.L. wrote the paper, which was revised by S.B., K.K. and S.H.; and all authors read and approved the manuscript.
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Li, Z., Lai, J., Zhang, P. et al. Multi-omics analyses of serum metabolome, gut microbiome and brain function reveal dysregulated microbiota-gut-brain axis in bipolar depression. Mol Psychiatry 27, 4123–4135 (2022). https://doi.org/10.1038/s41380-022-01569-9
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DOI: https://doi.org/10.1038/s41380-022-01569-9
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