Psychosocial Stress Increases Salivary Alpha-Amylase Activity Independently from Plasma Noradrenaline Levels

• DOI: 10.1371/journal.pone.0134561
• Publication Date: 2015-08-06T14:01:22Z
• Authors: Liubov Petrakova; Bettina K. Doering; Sabine Vits; Harald Engler; Winfried Rief; Manfred Schedlowski; Jan-Sebastian Gri...
• Keywords: Alpha-amylase; Sympathetic nervous system; Alpha (finance)

Salivary alpha-amylase activity (sAA) and plasma noradrenaline (NA) concentrations are often considered to be surrogate markers of sympathetic activation in response stress. However, despite accumulating evidence for a close association between sAA other indicators activity, reliability generality this relation remains unclear. We employed the Trier Social Stress Test (TSST) order directly compare responses NA psychological stress healthy volunteers (n = 23). The TSST significantly increased levels with no significant differences females males. when subjects were divided according their into low versus high responders, both groups did not differ before, during or after exposure. These data suggest that acute reflect however seemed increase independently from each other.