| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Research Abstract |
Heparan sulfate (HS) is a glycosaminoglycan chain which localizes extracellulary where it plays important roles in various biological processes. Heparan sulfate 6-O-sulfotransferase-2 (Hs6st2) is one of the enzymes that add sulfate groups to HS. Here we report that male Hs6st2 knockout mice showed reduced energy metabolism. Thus, 6-O-sulfation in HS seems to play an important role in mediating energy metabolism and alteration of the HS composition may result in metabolic syndrome phenotypes. Heparan sulfate 6-O-sulfation was reduced in brown adipose tissue, a major tissue regulating energy metabolism. When cultures of brown adipocytes from wild type and Hs6st2 knockout mice isolated and differentiated in vitro were treated with FGF21, downstream signaling was reduced. The serum level of thyroid stimulating hormone was significantly higher, and that of thyroxin was lower in the knockout mice, suggesting hypothyroid phenotype.
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