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Rohmann N, Schlicht K, Geisler C, Hollstein T, Knappe C, Krause L, Hagen S, Beckmann A, Seoudy AK, Wietzke-Braun P, Hartmann K, Schulte D, Türk K, Beckmann J, von Schönfels W, Hägele FA, Bosy-Westphal A, Franke A, Schreiber S, Laudes M. Circulating sDPP-4 is Increased in Obesity and Insulin Resistance but Is Not Related to Systemic Metabolic Inflammation. J Clin Endocrinol Metab 2021; 106:e592-e601. [PMID: 33084870 DOI: 10.1210/clinem/dgaa758] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Indexed: 12/18/2022]
Abstract
CONTEXT Dipeptidylpeptidase (DPP)-4 is a key regulator of the incretin system. It exists in a membrane-bound form and a soluble form (sDPP-4). Initial human studies suggested sDPP-4 to be an adipokine involved in metabolic inflammation. However, recent mechanistic data in genetically modified mice has questioned these findings. OBJECTIVES We examined circulating sDPP-4 in a cohort of n = 451 humans with different metabolic phenotypes and during 3 different weight loss interventions (n = 101) to further clarify its role in human physiology and metabolic diseases. DESIGN sDPP-4 serum concentrations were measured by enzyme-linked immunosorbent assay and related to several phenotyping data including gut microbiome analysis. RESULTS sDPP-4 increased with age and body weight and was positively associated with insulin resistance and hypertriglyceridemia but was reduced in manifest type 2 diabetes. In addition, we found reduced serum concentrations of sDPP-4 in subjects with arterial hypertension. In contrast to earlier reports, we did not identify an association with systemic markers of inflammation. Impaired kidney and liver functions significantly altered sDPP-4 concentrations while no relation to biomarkers for heart failure was observed. Having found increased levels of sDPP-4 in obesity, we studied surgical (gastric bypass and sleeve gastrectomy) and nonsurgical interventions, revealing a significant association of sDPP-4 with improvement of liver function tests but not with changes in body weight. CONCLUSIONS Our data suggest that sDPP-4 is related to hepatic abnormalities in obesity rather than primarily functioning as an adipokine and that sDPP-4 is implicated both in glucose and in lipid metabolism, but not fundamentally in systemic inflammation.
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Affiliation(s)
- Nathalie Rohmann
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Kristina Schlicht
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Corinna Geisler
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Tim Hollstein
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Carina Knappe
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Laura Krause
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Stefanie Hagen
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Alexia Beckmann
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Anna Katharina Seoudy
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Perdita Wietzke-Braun
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Katharina Hartmann
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Dominik Schulte
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Kathrin Türk
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
| | - Jan Beckmann
- Department of General, Visceral, Thoracic, Transplantation, and Pediatric Surgery, University of Kiel, Kiel, Germany
| | - Witigo von Schönfels
- Department of General, Visceral, Thoracic, Transplantation, and Pediatric Surgery, University of Kiel, Kiel, Germany
| | | | - Anja Bosy-Westphal
- Institut of Human Nutrition and Food Science, University of Kiel, Kiel, Germany
| | - Andre Franke
- Institut of Clinical Molecular Biology, University of Kiel, Kiel, Germany
| | - Stefan Schreiber
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
- Institut of Clinical Molecular Biology, University of Kiel, Kiel, Germany
| | - Matthias Laudes
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine 1, University of Kiel, Kiel, Germany
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