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Yamaguchi M, Nishimiya H. Noninvasive Evaluation of the Chronic Influence of Local Air Velocity from an Air Conditioner Using Salivary Cortisol and Skin Caspase-14 as Biomarkers of Psychosomatic and Environmental Stress. J Int Med Res 2012; 40:1429-37. [DOI: 10.1177/147323001204000421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
OBJECTIVE: To demonstrate the possibility of evaluating the chronic influence of local air velocity from an air conditioner using noninvasive biomarkers. METHODS: Over a consecutive 5-day period, 16 healthy young male adults were exposed to air flow from a whole ceiling-type air conditioner (low local air velocity) and from a commercial concentrated exhaust air conditioner (high local air velocity). Salivary cortisol was used as an index of the psychological effects and caspase-14, collected from the stratum corneum, was used as a marker of environmental stress on the skin. RESULTS: Local air velocity generated from the whole ceiling-type air conditioner where the subject's head was positioned was one-seventh that of the exhaust air conditioner. After exposure to the exhaust air conditioner for 5 days, salivary cortisol decreased significantly from morning to evening and skin caspase-14 gradually increased during the day. A significant increase in hydration index from the morning to the evening was found with the whole ceiling-type air conditioner. CONCLUSION: The effects of chronic exposure to air movement generated by an air conditioner may be quantified by measurement of salivary cortisol and skin caspase-14.
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Affiliation(s)
- M Yamaguchi
- Graduate School of Engineering, Iwate University, Morioka, Japan
| | - H Nishimiya
- Asahi Kasei Homes Corporation, R & D Laboratories, Fuji, Japan
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