| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
Peripheral-type benzodiazepine receptor (PBR) gene polymorphism is associated with stress sensitivity, but it is not yet clear whether polymorphisms in this gene have any influence on psychological stress. The present study was performed to examine the relationship between sleep bruxism and PBR gene polymorphism. The PBR gene was amplified using phi29 DNA polymerase after collection of DNA from oral mucosa cells. We also measured masseter muscle activity during sleep using portable electromyography to evaluate sleep bruxism. Furthermore, stimulated whole-saliva samples were collected for quantification of salivary chromogranin A (CgA) level. Thirty-two subjects (68.1%) had the G/G genotype, 13 (27.6%) had G/A, and 2 had A/A. The number of bruxism events was significantly higher in the G/A than the G/G group. Changes in salivary CgA levels were significantly lower in the G/A than G/G group. PBR gene polymorphism may influence psychological stress management through bruxism during sleep.
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