Authors: Takagi, Kuniaki¹; Hasunuma, Tsuyoshi¹; Goi, Nobuhiro¹; Harada, Hitoshi¹; Ikari, Akira¹; Hiramatsu, Mitsuo²; Nakamura, Kimitsugu³; Tsuboi, Hirohito⁴

Source: Stress and Health, Volume 21, Number 4, October 2005 , pp. 263-268(6)

Publisher: John Wiley & Sons, Ltd.

Abstract:

Response of ultra-weak chemiluminescence (UCL) in saliva before and after an experimental examination was explored in 10 healthy undergraduate students. Participants were asked to perform a task under supervision that consisted of a serial aseptic manipulation for cell culture. Saliva was collected 30 min before, immediately after, 30 min after and 60 min after the stress exposure. One-way repeated measures ANOVA for UCL revealed a significant difference across the four measurement occasions (F = 4.45, p < 0.05). Post hoc Dunnett's test clarified that UCL levels right after the stress exposure was significantly greater than that 30 min before the exposure (p < 0.05). The concentrations of secretory immunoglobulin A (sIgA) and cortisol in saliva were also measured. Two-way ANOVA with repeated measures indicated that UCL and sIgA exhibited the same change pattern in the four occasions (F = 0.28, p = 0.84), whereas UCL changed differently from cortisol (F = 5.82, p < 0.005). It was suggested that salivary UCL may be a sensitive biomarker for acute psychological changes. Copyright © 2005 John Wiley & Sons, Ltd.

Keywords: performance anxiety; saliva; ultra-weak chemiluminescence (UCL); sIgA; cortisol

Document Type: Short communication

DOI: http://dx.doi.org/10.1002/smi.1064

Affiliations: 1: Department of Environmental Biochemistry, School of Pharmaceutical Science, University of Shizuoka, Shizuoka, Japan 2: Hamamatsu Photonics K.K. Central Research Laboratory, Hirakuchi, Hamakita, Japan 3: Hamamatsu Photonics K.K. Electron Tube Division, Toyooka, Japan 4: Department of Epidemiology and Public Health, School of Health Promotional Science, University of Hamamatsu, Hamamatsu, Japan

Publication date: 2005-10-01

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