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Updated: Feb 9, 2026

Inducible and Reversible Dominant-negative DN Protein Inhibition
Published on: January 7, 2019
Decrease in Serum Amyloid a Protein Levels Following Three-month Stays in Negatively Charged Particle-dominant Indoor
Suni Lee1, Shoko Yamamoto1, Yasumitsu Nishimura1
1Department of Hygiene, Kawasaki Medical School, 577 Mastushima, Kurashiki 701-0192, Japan.
Objective:
The changes in serum adipokines and cytokines related to oxidative stress were examined during 3 months 'Off to On' and 'On to Off' periods using negatively charged particle-dominant indoor air conditions (NCPDIAC).
Methods:
Seven volunteers participated in the study, which included 'OFF to 3 months ON' periods (ON trials) for a total of 16 times, and 'ON to 3 months OFF' (OFF trials) periods for a total of 13 times.
Results:
With the exception of one case, serum amyloid A (SAA) levels decreased significantly during the ON trials.
Conclusion:
Considering that SAA is an acute phase reactive protein such as C reactive protein (CRP), this observed decrease might indicate the prevention of cardiovascular and atherosclerotic changes, since an increase in high-sensitive CRP is associated with the subsequent detection of these events.
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