| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
Circadian clocks in mammals are controlled by neuronal network activities in the suprachiasmatic nucleus (SCN) of the hypothalamus in the brain. The SCN controls 24h rhythms in physiology and behavior, such as sleep-wake cycles, hormone release, etc. However, the network-level mechanisms of circadian rhythm are poorly understood.
In the present study, we performed large-scale time-lapse imaging in large population of neurons in the SCN. I combined the methods of fluorescence imaging of intracellular calcium ion, bioluminescence imaging of clock gene expression, multi-electrode array dish for detecting neuronal firings, or voltage-sensitive fluorescent probes, and I succeeded, for the first time, in simultaneous recording of multiple neuronal functions (Calcium, gene expression, neuronal firing, etc) from identical locations in same SCN. I analyzed spatial patterns and temporal order of these functions, and found the functional link between these rhythms.
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