Perceived stress and norepinephrine predict the effectiveness of response to protease inhibitors in HIV

Int J Behav Med. 2008;15(3):221-6. doi: 10.1080/10705500802219606.

Abstract

Background: In vitro evidence has suggested that increasing levels of norepinephrine (NE) can accelerate HIV replication; however, the importance in a clinical setting has not been tested.

Purpose: The purpose of this study was to determine if perceived stress as well as the stress hormones NE and cortisol would predict the response to starting a new protease inhibitor (PI) prospectively.

Method: Perceived stress, urinary cortisol and norepinephrine, CD4 and viral load (VL) were measured in people with HIV before starting a new PI and six months later (an average of three months after starting the new PI) in order to determine CD4 and VL response to the PI.

Results: Higher perceived stress significantly predicted lower effectiveness of the new PI in increasing CD4 and decreasing VL controlling for age, duration of new PI, baseline CD4/VL, sexually transmitted diseases (STDs), and gender/ethnic risk groups. Higher norepinephrine, but not cortisol, predicted worse VL response to PIs and, in fact, mediated the relationship between perceived stress and change in VL.

Conclusion: Perceived stress and high norepinephrine levels are prospectively associated with a poorer response to starting a new PI. Assessing stress and norepinephrine levels in patients starting on antiretroviral medications might be clinically useful.

Publication types

  • Comparative Study
  • Research Support, N.I.H., Extramural

MeSH terms

  • CD4 Lymphocyte Count
  • Disease Progression
  • Female
  • HIV Infections / blood*
  • HIV Infections / drug therapy
  • HIV Infections / urine*
  • Humans
  • Hydrocortisone / urine
  • Longitudinal Studies
  • Male
  • Norepinephrine / urine*
  • Protease Inhibitors / pharmacology*
  • Protease Inhibitors / therapeutic use
  • Regression Analysis
  • Stress, Psychological / blood*
  • Stress, Psychological / urine*
  • Surveys and Questionnaires
  • Viral Load

Substances

  • Protease Inhibitors
  • Hydrocortisone
  • Norepinephrine