Publication details

ANALÝZA KORTIZOLU VO VLASOCH – BIOMARKER AKTIVÁCIE HPA OSI

Title in English Hair cortisol analysis - an HPA axis activation biomarker
Authors

KOSTOLANSKÁ Katarína PEŠ Ondřej TÁBORSKÁ Eva NOVOTNÁ Lucie

Year of publication 2018
Type Conference abstract
MU Faculty or unit

Faculty of Medicine

Citation
Description Cortisol is a glucocorticoid hormone, which plays an important role in stressful situations when stressors activate the hypothalamic-pituitary-adrenocortical (HPA) system. Cortisol has been routinely analyzed in the laboratory from saliva, serum/plasma, and/or urine. However, the HPA axis represents a highly dynamic system influenced by several factors and expose circadian rhythmicity. When analyzed in hair, it can allow the unique possibility to assess the long-term systemic levels and obtain a retrospective index of long-term hormone secretion. Based on an average hair growth rate of 1 cm per month, it is possible to distribute the hair along the length of individual segments and determine the concentration of cortisol reflecting secretion in the monitored period. Online SPE LC-MS with 13C3-cortisol as a surrogate analyte was developed, validated and applied for obtaining hair cortisol levels of 114 healthy volunteers. The first 3 cm from a posterior vertex position were analyzed as three individual segments resulting in 310 hair cortisol levels, which were used, after log transformation, to predict a range of values observed in future. The median value of hair cortisol was 4.76 pg/mg. The employed method allowed simple processing, high throughput and may be readily expanded to analyze additional steroid compounds in hair.
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