Blunted glucocorticoid and mineralocorticoid sensitivity to stress in people with diabetes

Livia A Carvalho, Livia Urbanova, Mark Hamer, Ruth A Hackett, Antonio I Lazzarino, Andrew Steptoe

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

Psychological stress may contribute to type 2 diabetes but mechanisms are still poorly understood. In this study, we examined whether stress responsiveness is associated with glucocorticoid and mineralocorticoid sensitivity in a controlled experimental comparison of people with type 2 diabetes and non-diabetic participants. Thirty-seven diabetes patients and 37 healthy controls underwent psychophysiological stress testing. Glucocorticoid (GR) and mineralocorticoid sensitivity (MR) sensitivity were measured by dexamethasone- and prednisolone-inhibition of lipopolysaccharide (LPS)-induced interleukin (IL) 6 levels, respectively. Blood pressure (BP) and heart rate were monitored continuously, and we periodically assessed salivary cortisol, plasma IL-6 and monocyte chemotactic protein (MCP-1). Following stress, both glucocorticoid and mineralocorticoid sensitivity decreased among healthy controls, but did not change in people with diabetes. There was a main effect of group on dexamethasone (F(1,74)=6.852, p=0.013) and prednisolone (F(1,74)=7.295, p=0.010) sensitivity following stress at 45 min after tasks. People with diabetes showed blunted stress responsivity in systolic BP, diastolic BP, heart rate, IL-6, MCP-1, and impaired post-stress recovery in heart rate. People with Diabetes had higher cortisol levels as measured by the total amount excreted over the day and increased glucocorticoid sensitivity at baseline. Our study suggests that impaired stress responsivity in type-2 diabetes is in part due to a lack of stress-induced changes in mineralocorticoid and glucocorticoid sensitivity.

Original languageEnglish
Pages (from-to)209-18
Number of pages10
JournalPsychoneuroendocrinology
Volume51
DOIs
Publication statusPublished - Jan 2015

Keywords

  • Aged
  • Blood Pressure/drug effects
  • Chemokine CCL2/blood
  • Dexamethasone/pharmacology
  • Diabetes Mellitus, Type 2/blood
  • Female
  • Glucocorticoids/pharmacology
  • Heart Rate/drug effects
  • Humans
  • Hydrocortisone/analysis
  • Hypothalamo-Hypophyseal System/drug effects
  • Interleukin-6/blood
  • Male
  • Middle Aged
  • Pituitary-Adrenal System/drug effects
  • Prednisolone/pharmacology
  • Saliva/chemistry
  • Stress, Psychological/blood

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