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Abstract: Basal circadian and pulsatile ACTH and cortisol secretion in patients with fibromyalgia and/or chronic fatigue syndrome

  [ 58 votes ]   [ Discuss This Article ] • May 26, 2004

Brain Behav Immun. 2004 Jul;18(4):314-325. Crofford LJ, Young EA, Engleberg NC, Korszun A, Brucksch CB, McClure LA, Brown MB, Demitrack MA. Department of Internal Medicine, University of Michigan School of Medicine, Ann Arbor, MI, USA.

The objective of this study was to evaluate and compare the basal circadian and pulsatile architecture of the HPA axis in groups of patients with FMS, CFS, or both syndromes with individually matched control groups.

Forty patients with either FMS ( [Formula: see text] ), FMS and CFS ( [Formula: see text] ), or CFS ( [Formula: see text] ) were matched by age (18-65), sex, and menstrual status to healthy controls. Subjects were excluded if they met criteria for major Axis I psychiatric disorders by structured clinical interview (SCID). Subjects were admitted to the General Clinical Research Center where meals and activities were standardized. Blood was collected from an intravenous line every 10min over 24h for analysis of ACTH and cortisol. Samples were evaluable for ACTH in 36 subject pairs and for cortisol in 37 subject pairs.

There was a significant delay in the rate of decline from acrophase to nadir for cortisol levels in patients with FMS ( [Formula: see text] ). Elevation of cortisol in the late evening quiescent period was evident in half of the FMS patients compared with their control group, while cortisol levels were numerically, but not significantly, lower in the overnight period in patients with CFS compared with their control group. Pulsatility analyses did not reveal statistically significant differences between patient and control groups.

We conclude that the pattern of differences for basal circadian architecture of HPA axis hormones differs between patients with FMS and CFS compared to their matched control groups. The abnormalities in FMS patients are consistent with loss of HPA axis resiliency.

PMID: 15157948 [PubMed - as supplied by publisher]

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