| Budget Amount *help |
¥45,890,000 (Direct Cost: ¥35,300,000、Indirect Cost: ¥10,590,000)
Fiscal Year 2011: ¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
Fiscal Year 2010: ¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
Fiscal Year 2009: ¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
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| Research Abstract |
We have newly established pancreatic b-cell lines(named MIN6-K). In monolayer culture, MIN6-K8 cells respond to both glucose stimulation and cAMP-increasing agents such as the incretin hormones, while MIN6-K20 cells respond to glucose stimulation, but not to incretins. We found that the formation of three-dimensional structure of MIN6-K20 cells(pseudoislets) drastically induces cAMP/incretin responsiveness to a level similar to that of normal pancreatic islets. We also found that formation of three-dimensional structure is required for transdifferentiation of pancreatic acinar cells to b-cells in vitro. These findings indicate that three-dimensional structure of pancreatic b-cells is critical in development of normal regulation of insulin secretion as an integrative system.
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