Abstract：
BACKGROUND:Hydrogen sulfide (H2S) is the third gasotransmitter recently discovered after nitric oxide (NO) and carbon monoxide. Both NO and H2S are involved in multiple physiological functions. Whereas NO has been shown to vary with psychological stress, the influence of stress on H2S and the relationship between H2S and NO are unknown. We therefore examined levels of salivary H2S and NO in response to a stressful final academic exam period. METHODS:Measurements of stress, negative affect, and fraction of exhaled NO (FENO), were obtained from students (N=16) and saliva was collected at three time points: low-stress period in the semester, early exam period, and late exam period. Saliva was immediately analyzed for H2S with the fluorescent probe Sulfidefluor-4. RESULTS:H2S increased significantly during the early exam period and FENO decreased gradually towards the late exam period. H2S, FENO, negative affect, and stress ratings were positively associated with each other: as stress level and negative affect increased, values of H2S increased; in addition, as FENO levels decreased, H2S also decreased. Asthma status did not modify these associations. CONCLUSION:Sustained academic stress increases H2S and these changes are correlated with NO and the experience of stress and negative affect. These findings motivate research with larger samples to further explore the interaction and function of H2S and FENO during psychological stress.
journal_name
Physiol Behavjournal_title
Physiology & behaviorauthors
Kroll JL,Werchan CA,Reeves AG,Bruemmer KJ,Lippert AR,Ritz Tdoi
10.1016/j.physbeh.2017.05.023subject
Has Abstractpub_date
2017-10-01 00:00:00pages
99-104eissn
0031-9384issn
1873-507Xpii
S0031-9384(17)30151-8journal_volume
179pub_type
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