Glucocorticoids modulate human brown adipose tissue thermogenesis in vivo

Research output: Contribution to journalArticlepeer-review

Authors

  • Hannah Scotney
  • Michael E. Symonds
  • James Law
  • Helen Budge
  • Don Sharkey

Colleges, School and Institutes

External organisations

  • Nurture Fertility, The East Midlands Fertility Clinic, Nottingham, NG10 5QG, UK; Division of Child Health, Obstetrics and Gynaecology, School of Medicine, University of Nottingham, Nottingham, NG7 2UH, UK.

Abstract

Introduction

Brown adipose tissue (BAT) is a thermogenic organ with substantial metabolic capacity and has important roles in the maintenance of body weight and metabolism. Regulation of BAT is primarily mediated through the ß-adrenoceptor (ß-AR) pathway. The in vivo endocrine regulation of this pathway in humans is unkown. The objective of our study was to assess the in vivo BAT temperature responses to acute glucocorticoid administration.

Methods

We studied 8 healthy male volunteers, not pre-selected for BAT presence or activity and without prior BAT cold-activation, on two occasions, following an infusion with hydrocortisone (0.2 mg.kg-1.min-1 for 14 hours) and saline, respectively. Infusions were given in a randomized double-blind order. They underwent assessment of supraclavicular BAT temperature using infrared thermography following a mixed meal, and during ß-AR stimulation with isoprenaline (25 ng.kg fat-free mass-1.min-1 for 60 min) in the fasting state.

Results

During hydrocortisone infusion, BAT temperature increased both under fasting basal conditions and during ß-AR stimulation. We observed a BAT temperature threshold, which was not exceeded despite maximal ß-AR activation. We conclude that BAT thermogenesis is present in humans under near-normal conditions. Glucocorticoids modulate BAT function, representing important physiological endocrine regulation of body temperature at times of acute stress.

Details

Original languageEnglish
Pages (from-to)125-132
JournalMetabolism
Volume70
Early online date19 Jan 2017
Publication statusPublished - 1 May 2017

Keywords

  • Brown adipose tissue , Glucocorticoids , Humans , Infrared thermography , Beta adrenoceptor