High heart rate reactors display greater decreases in tear SIgA concentration following a novel acute stressor

Electronic versions

Documents

  • Hanstock_Biol Psychol_accepted

    Accepted author manuscript, 285 KB, PDF-document

    Embargo ends: 7/02/19

    Licence: CC BY-NC-ND Show licence

DOI

Tear secretory immunoglobulin-A (SIgA) is a putative biomarker of common-cold risk with potential utility in non-invasive diagnostics. As SIgA secretion at the ocular surface is under strong autonomic control, we investigated the relationship between HR reactivity and tear SIgA responses to novel experiential stress. Thirty-two healthy participants undertook a 60 s zip-line ride to evoke acute stress and a seated-rest control trial in a randomised-crossover design. We recorded heart rate (HR) continuously and collected unstimulated tear samples 5 min pre-, 2 min post- and 20 min post-stress/control. Stress increased HR and state anxiety whereas tear SIgA concentration decreased 44% post-stress vs. control. Higher peak HR values during stress uniquely explained 21% of the variance in tear SIgA reactivity to stress (p < 0.01); high HR reactors displayed greater decreases in tear SIgA concentration. We conclude that physiological arousal increases immune reactivity to acute stress and highlight tear SIgA as a minimally-invasive, physiologically relevant biomarker of immune reactivity.
Original languageEnglish
Pages (from-to)85-88
JournalBiological Psychology
Volume133
Issue numberMarch
Early online date7 Feb 2018
DOIs
StatePublished - Mar 2018
View graph of relations