| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
Functional dyspepsia is defined as persistent or recurrent upper gastrointestinal tract symptoms such as pain without any obvious pathological changes. We examined the changes in pain sensation of the stomach after the stress in rat. In addition, involvements of corticotropin releasing factor (CRF), Type 2 CRF receptor (CRFR2) and CRF related peptides Urocortin (UCN) 1/2/3 in gastric hyperalgesia were investigated. Repeated WAS produced gastric hyperalgesia after the stress, with no obvious lesions in the gastric mucosa. Gastric hyperalgesia was inhibited by CRFR2 antagonists. CRF, CRFR2, and UCN1/2 positive cells existed in lamina propria. CRFR2 positive cells ware increased after WAS. Mast cells co-expressed CRFR2 or UCN2 in the lamina propria. WAS developed gastric hyperalgesia even in the absence of detectable gastric pathology, suggesting its suitability for a potential animal model of FD. CRFR2 play important roles in gastric hyperalgesia observed after the stress.
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