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Abnormalities in gut microbiota and serum metabolites in hemodialysis patients with mild cognitive decline: a single-center observational study

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Abstract

Rationale

Although a growing body of evidence indicates that the scores of cognitive function in hemodialysis patients are significantly lower than those of healthy individuals, underlying mechanisms have not been fully elucidated.

Objectives

To investigate the roles of gut microbiota and serum metabolites in hemodialysis patients with mild cognitive decline (MCD).

Methods

A total of 30 healthy individuals and 77 hemodialysis patients were enrolled and were classified into healthy control (HC), normal cognitive function (NCF), and MCD groups by evaluation of Montreal Cognitive Assessment. Fecal samples were analyzed by 16S rRNA and serum samples were analyzed by gas chromatography-mass spectrometry from all subjects.

Results

The 16S rRNA study demonstrated that the gut microbiota profiles, including α- and β-diversity, and a number of 16 gut bacteria were significantly altered in the MCD group compared with those in HC or those with NCF. A metabonomics study showed that a total of 29 serum metabolites were altered in the MCD group. Receiver operating characteristic curves showed that Genus Bilophila and serum putrescine might be sensitive biomarkers to indicate MCD in patients with hemodialysis.

Conclusions

These findings demonstrate gut microbiota and serum metabolites were probably involved in the pathogenesis of hemodialysis-related MCD. Therapeutic strategies targeting abnormalities in gut microbiota and serum metabolites may facilitate the beneficial effects for hemodialysis patients with MCD.

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Funding

This study was supported by grants from the National Natural Science Foundation of China (to C.Y., 81703482 and 81974171) and was partially supported by the Program of Bureau of Science and Technology Foundation of Changzhou (to B.Z., CJ20159022; to L.M., CJ20179028) and Major Science and Technology Projects of Changzhou Municipal Committee of Health and Family Planning (to B.Z., ZD201505; to L.M., ZD201601). And we thank Shanghai OE Biotechnology Company for providing assistance in data analysis of 16S rRNA sequencing.

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Correspondence to Liying Miao or Chun Yang.

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The authors declare that they have no conflicts of interest.

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Zhu, B., Shen, J., Jiang, R. et al. Abnormalities in gut microbiota and serum metabolites in hemodialysis patients with mild cognitive decline: a single-center observational study. Psychopharmacology 237, 2739–2752 (2020). https://doi.org/10.1007/s00213-020-05569-x

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  • DOI: https://doi.org/10.1007/s00213-020-05569-x

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