Cold exposure increases circulating fibroblast growth factor 21 in the eveninin males and females

Carlijn A. Hoekx*, Borja Martinez-Tellez, Maaike E. Straat, Magdalena M.A. Verkleij, Mirjam Kemmeren, Sander Kooijman, Martin Uhrbom, Saskia C.A. de Jager, Patrick C.N. Rensen, Mariëtte R. Boon

*Corresponding author for this work

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Abstract

Objectives: Cold exposure is linked to cardiometabolic benefits. Cold activates brown adipose tissue (BAT), increases energy expenditure, and induces secretion of the hormones fibroblast growth factor 21 (FGF21) and growth differentiation factor 15 (GDF15). The cold-induced increase in energy expenditure exhibits a diurnal rhythm in men. Therefore, we aimed to investigate the effect of cold exposure on serum FGF21 and GDF15 levels in humans and whether cold-induced changes in FGF21 and GDF15 levels differ between morning and evening in males and female Method: In this randomized cross-over study, serum FGF21 and GDF15 levels were measured in healthy lean males (n = 12) and females (n = 12) before, during, and after 90 min of stable cold exposure in the morning (07:45 h) and evening (19:45 h) with a 1-day washout period in between. Results: Cold exposure increased FGF21 levels in the evening compared to the morning both in males (+61% vs −13%; P < 0.001) and in females (+58% vs +8%; P < 0.001). In contrast, cold exposure did not significantly modify serum GDF15 levels, and no diurnal variation was found. Changes in FGF21 and GDF15 levels did not correlate with changes in cold-induced energy expenditure in the morning and evening. Conclusion: Cold exposure increased serum FGF21 levels in the evening, but not in the morning, in both males and females. GDF15 levels were not affected by cold exposure. Thus, this study suggests that the timing of cold exposure may influence cold-induced changes in FGF21 levels but not GDF15 levels and seems to be independent of changes ienergy expenditure.

Original languageEnglish
Article numbere240074
Number of pages10
JournalEndocrine connections
Volume13
Issue number7
DOIs
Publication statusPublished - Jul 2024

Keywords

  • brown adipose tissue
  • circadian rhythm
  • cold stimulus
  • energy metabolism

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