Abstract
Background
Bile acids (BAs) have been demonstrated to exert a variety of metabolic effects and alterations in BAs have been reported in patients with obesity, insulin resistance (IR) and type 2 diabetes mellitus (T2DM). However, it is unclear which metabolic condition is the main contributor to alterations in BAs. In this study, we investigate the associations between different BA profiles with glycemia, obesity or IR status.
Methods
Fasting serum concentrations of 15 BA species were determined in a total of 241 individuals (71 drug-naïve patients with T2DM, 95 patients with impaired fasting glucose [IFG], and 75 healthy controls.
Results
A comparison of the mean values of the BAs revealed no significant differences between normoglycemic controls and patients with IFG or T2DM. However, when the entire cohort was divided according to the presence of IR as determined by a homeostasis model assessment of insulin resistance (HOMA-IR) value >2.5, the levels of total BA and most species of BAs were significantly higher in patients with IR than in patients without. In the correlation analysis, most species of BAs, as well as total BA, were significantly associated with HOMA-IR levels. Furthermore, when the subjects were divided into four groups according to IR and diabetic status, subjects with IR had significantly higher total BAs than participants without IR both in diabetic and non-diabetic groups. Ultimately, multiple linear regression analysis identified HOMA-IR as the only significant contributor to most serum BA species.
Conclusions
Our findings support the essential role of IR in regulating BA metabolism and that this effect is independent of diabetic status.
Author contributions: S-G. L. designed the study, analyzed all data and wrote the manuscript. Y. L. recruited the patients and contributed critical discussions. E. C. performed experiments and researched the data. Y. C. contributed critical discussions and produced the illustrations. J-H. K. researched data, contributed statistical analysis and edited the manuscript. All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT and Future Planning, Republic of Korea (NRF-2017R1C1B5015044) and the faculty research grant of Yonsei University College of Medicine (6-2017-0051).
Employment or leadership: None declared.
Honorarium: None declared.
Competing interests: The funding organizations played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.
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Supplementary Material
The online version of this article offers supplementary material (https://doi.org/10.1515/cclm-2018-0741).
©2019 Walter de Gruyter GmbH, Berlin/Boston
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Articles in the same Issue
- Frontmatter
- Editorials
- CCLM Award for the Most Cited Paper
- Folate and vitamin B12 assays after recalibration to the WHO International Standard 03/178: making the interpretation as simple as possible, but not simpler
- Reviews
- Blood contamination in salivary diagnostics: current methods and their limitations
- Central adrenal insufficiency: open issues regarding diagnosis and glucocorticoid treatment
- Genetics and Molecular Diagnostics
- Measuring the chronology of the translational process of molecular genetic discoveries
- Development and interlaboratory evaluation of a NIST Reference Material RM 8366 for EGFR and MET gene copy number measurements
- General Clinical Chemistry and Laboratory Medicine
- Post-translational modification-derived products are associated with frailty status in elderly subjects
- Urine chloride self-measurement to monitor sodium chloride intake in patients with chronic kidney disease
- Estimated urinary osmolality based on combined urinalysis parameters: a critical evaluation
- Measurement of S100B protein: evaluation of a new prototype on a bioMérieux Vidas® 3 analyzer
- Measuring thyroglobulin in patients with thyroglobulin autoantibodies: evaluation of the clinical impact of BRAHMS Kryptor® Tg-minirecovery test in a large series of patients with differentiated thyroid carcinoma
- Human chorionic gonadotropin suspected heterophile interference investigations in immunoassays: a recommended approach
- Certified reference material against PR3 ANCA IgG autoantibodies. From development to certification
- Diagnostic accuracy of a fully automated multiplex celiac disease antibody panel for serum and plasma
- Fasting serum bile acids concentration is associated with insulin resistance independently of diabetes status
- Hematology and Coagulation
- The association between activated protein C ratio and Factor V Leiden are gender-dependent
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- Cardiovascular Diseases
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- Infectious Diseases
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- Letters to the Editor
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- Reference values of a new serum folate assay traceable to the WHO International Standard
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