Associations Between Chronotype and Salivary Endocrinological Stress Markers

作者：Toda Masahiro^*; Kawai Tomoko; Takeo Keiko; Rokutan Kazuhito; Morimoto Kanehisa

来源：Endocrine Research, 2013, 38(1): 1-7.

DOI：10.3109/07435800.2012.683225

• Chronotype
• alpha-Amylase
• Cortisol
• Stress marker
• Human saliva

Objectives. To investigate the effect of chronotype on salivary cortisol or salivary alpha-amylase (sAA). Methods. From 108 male university students, saliva samples were collected in the afternoon (between 15: 00 and 17: 00). The salivary cortisol and sAA levels were determined with commercial kits. Chronotype was quantitatively evaluated using the Horne and Ostberg Morningness-Eveningness Questionnaire. Subjects were categorized into morning types and evening types. Results. The sAA levels were lower in the morning types than in the evening types. We found no significant difference in salivary cortisol levels between the two groups. Conclusions. These findings suggest that the sAA levels may be associated with chronotype.

• 出版日期2013