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Novel associations between blood metabolites and kidney function among Bogalusa Heart Study and Multi-Ethnic Study of Atherosclerosis participants

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Abstract

Introduction

Chronic kidney disease (CKD) is a major public health challenge given its high global prevalence and associated risks of cardiovascular disease and progression to end stage renal disease. Although it is known that numerous metabolic changes occur in CKD patients, identifying novel metabolite associations with kidney function may enhance our understanding of the physiologic pathways relating to CKD.

Objectives

The objective of this study was to elucidate novel metabolite associations with kidney function among participants of two community-based cohorts with carefully ascertained metabolomics, kidney function, and covariate data.

Methods

Untargeted ultrahigh-performance liquid chromatography–tandem mass spectrometry was used to detect and quantify blood metabolites. We used multivariate adjusted linear regression to examine associations between single metabolites and creatinine-based estimated glomerular filtration rate (eGFRcr) among 1243 Bogalusa Heart Study (BHS) participants (median eGFRcr: 94.4, 5th–95th percentile: 66.0–119.6 mL/min/1.73 m2). Replication, determined by statistical significance and consistent effect direction, was tested using gold standard measured glomerular filtration rate (mGFR) among 260 Multi-Ethnic Study of Atherosclerosis (MESA) participants (median mGFR: 72.0, 5th–95th percentile: 43.5–105.0 mL/min/1.73 m2). All analyses used Bonferroni-corrected alpha thresholds.

Results

Fifty-one novel metabolite associations with kidney function were identified, including 12 from previously unrelated sub-pathways: N6-carboxymethyllysine, gulonate, quinolinate, gamma-CEHC-glucuronide, retinol, methylmalonate, 3-hydroxy-3-methylglutarate, 3-aminoisobutyrate, N-methylpipecolate, hydroquinone sulfate, and glycine conjugates of C10H12O2 and C10H14O2(1). Significant metabolites were generally inversely associated with kidney function and smaller in mass-to-charge ratio than non-significant metabolites.

Conclusion

The 51 novel metabolites identified may serve as early, clinically relevant, kidney function biomarkers.

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Data availability

The metabolomic data sets generated and analyzed during this study are available as supplementary data.

Abbreviations

AGE:

Advanced glycation end-product

BAIBA:

Β-aminoisobutyric acid

BCAA:

Branched-chain amino acids

BHS:

Bogalusa Heart Study

BMI:

Body mass index

CEHC:

Carboxyethyl hydroxychroman

CKD:

Chronic kidney disease

CML:

N6-carboxymethyllysine

CVD:

Cardiovascular disease

eGFR:

Estimated glomerular filtration rate

eGFRcr:

Creatinine based eGFR

GFR:

Glomerular filtration rate

MESA:

Multi-Ethnic Study of Atherosclerosis

mGFR:

Measured glomerular filtration rate

MMA:

Methylmalonate

SD:

Standard deviation

UPLC–MS/MS:

Ultrahigh performance liquid chromatography–tandem mass spectrometry

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Acknowledgements

This study was funded by the National Institute on Aging of the NIH under award numbers R01AG041200 and R21AG051914. Research reported in this publication was partially supported by the National Institute of General Medical Sciences of the NIH under award number P20GM109036. We are grateful for the contribution of all staff members who were involved in conducting BHS and MESA. We extend our gratitude to the participants of BHS (many of whom have diligently participated since they were children) and MESA.

Funding

This study was funded by the National Institute on Aging of the NIH under Award Numbers R01AG041200 and R21AG051914. Research reported in this publication was partially supported by the National Institute of General Medical Sciences of the NIH under Award Number P20GM109036.

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Authors and Affiliations

Authors

Contributions

JLN, TNK, JH, SL, LB, HH, AHA, and WC designed the study; JLN, CL, XG, MS, ACR, and XM analyzed the data; JMK contributed to the logistics and optimization of the untargeted metabolomics; CMR, JC, ASL, LAI, and MS performed replication of the study results; JLN made the figures; JLN and TNK drafted and revised the manuscript; all authors read and approved the final article.

Corresponding author

Correspondence to Tanika N. Kelly.

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Conflict of interest

JLN, TNK, JH, SL, LB, HH, AHA, WC, CL, XG, MS, ACR, XM, CMR, JC, ASL, LAI, and MS declare that they have no conflict of interest. JMK is employed by Metabolon, Inc. He contributed to the logistics, optimization, and interpretation of the untargeted metabolomics. Metabolon, Inc. was not involved in the study design, statistical analysis, or interpretation of the results.

Research involving human participants and/or animals

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional review boards at participating institutions and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Nierenberg, J.L., He, J., Li, C. et al. Novel associations between blood metabolites and kidney function among Bogalusa Heart Study and Multi-Ethnic Study of Atherosclerosis participants. Metabolomics 15, 149 (2019). https://doi.org/10.1007/s11306-019-1613-3

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