Thromb Haemost 2022; 122(04): 560-569
DOI: 10.1055/s-0041-1732295
Stroke, Systemic or Venous Thromboembolism

Plasma Levels of Leptin and Risk of Future Incident Venous Thromboembolism

1   Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway
,
Kristian Hindberg
1   Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway
,
Pål Aukrust
1   Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway
2   Faculty of Medicine, University of Oslo, Oslo, Norway
3   Research Institute of Internal Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway
4   Section of Clinical Immunology and Infectious Diseases, Oslo University Hospital, Rikshospitalet, Oslo, Norway
,
Thor Ueland
1   Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway
2   Faculty of Medicine, University of Oslo, Oslo, Norway
3   Research Institute of Internal Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway
,
Sigrid K. Brækkan
1   Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway
5   Division of Internal Medicine, University Hospital of North Norway, Tromsø, Norway
,
John-Bjarne Hansen
1   Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway
5   Division of Internal Medicine, University Hospital of North Norway, Tromsø, Norway
,
Vânia M. Morelli
1   Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway
› Author Affiliations
Funding The Thrombosis Research Center has received an independent grant from Stiftelsen Kristian Gerhard Jebsen. T.F. is supported by the Northern Norway Regional Health Authority.

Abstract

Background Circulating levels of leptin, an adipocyte-derived hormone, are frequently elevated in obesity. Leptin has been reported to upregulate prothrombotic hemostatic factors in vitro and could potentially mediate venous thromboembolism (VTE) risk in obesity. However, whether leptin is associated with VTE remains uncertain.

Objective This article investigates the association between plasma leptin and risk of incident VTE, and the potential of leptin to mediate VTE risk in obesity.

Methods A population-based nested case–control study with 416 VTE cases and 848 age- and sex-matched controls was derived from the Tromsø Study. Logistic regression was used to calculate odds ratios (ORs) with 95% confidence intervals (CIs) for VTE across leptin quartiles. Analyses were performed separately in men and women using sex-specific quartile cut-offs determined in controls.

Results In the age-adjusted model, the VTE risk increased across leptin quartiles, particularly in men. Compared with the lowest quartile, the ORs for VTE in the highest quartile were 1.70 (95% CI 1.04–2.79) in men and 1.36 (95% CI 0.85–2.17) in women. However, with additional adjustment for body mass index (BMI), risk estimates were markedly attenuated in men (OR 1.03, 95% CI 0.55–1.93) and women (OR 0.82, 95% CI 0.45–1.48). The ORs for VTE were increased in obese men and women (BMI ≥ 30 kg/m2) and were only marginally affected after adjustment for leptin.

Conclusion Our results indicate that the apparent association between plasma leptin levels and VTE risk is confounded by BMI and that leptin is not a relevant mediator for VTE risk in obesity.

Author Contributions

T.F. analyzed data, interpreted the results, and drafted the manuscript. K.H. provided statistical support, interpreted the results, and revised the manuscript. P.A. and T.U. performed the laboratory analysis, interpreted the results, and revised the manuscript. S.K.B. designed the study, organized data collection, interpreted the results, and revised the manuscript. J.-B.H. designed the study, organized data collection, interpreted the results, and revised the manuscript. V.M.M. designed the study, interpreted the results, contributed to the manuscript draft, and revised the manuscript. All authors reviewed and approved the final version of the manuscript.


Supplementary Material



Publication History

Received: 24 March 2021

Accepted: 05 June 2021

Article published online:
11 July 2021

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