| Budget Amount *help |
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2016: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
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| Outline of Final Research Achievements |
We have reported that histidine administration reduced blood glucose levels in mice, by suppressing hepatic glucose production via central histamine action. Although histidine is expected to be a candidate for blood glucose-lowering nutrient, the precise mechanism of how central histidine suppresses hepatic glucose production remains unclear. Here, we found that central action of histidine and histamine decreased hepatic gluconeogenic genes by activating hepatic STAT3 signaling via the vagus nerve. Moreover, we found that the vagus nerve suppressed hepatic IL-6/STAT3 signaling via the α7-nicotinic acetylcholine receptors, and that central insulin action activated hepatic IL-6/STAT3 signaling by suppressing vagal activity.
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