| Budget Amount *help |
¥20,930,000 (Direct Cost: ¥16,100,000、Indirect Cost: ¥4,830,000)
Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2017: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000)
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| Outline of Final Research Achievements |
Obesity is associated with proliferation and differentiation of adipose-derived stem cells (ADSCs) into mature adipocytes. Nutritional stimuli induce ADSCs proliferation and differentiation, and this process is well established because master regulators of adipogenic differentiation, C/EBPalpha and PPARgamma were identified. However, under normal condition, molecular mechanisms to maintain stemness of ADSCs are largely unknown.
To identify genes essential for the maintenance, microarray analysis was performed on murine ADSCs and 4-day cultured ADSCs (preadipocytes). Among the 223 up-regulated transcriptional factor genes in ADSCs, we focused on nuclear receptor 4a (Nr4a) family, which play diverse roles including metabolic processes. Nr4a-overexpressed preadipocytes showed reduced accumulation of lipid droplet and decreased expressions of C/EBPalpha and PPARgamma. ChIP analysis confirmed that Nr4a directly bound to C/EBPalpha and PPARgamma promotor.
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