| Project/Area Number |
19500694
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Eating habits, studies on eating habits
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| Research Institution | Kagawa Nutrition University |
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Principal Investigator |
FUKUSHIMA Akiko Kagawa Nutrition University, 栄養学部, 准教授 (50327962)
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| Co-Investigator(Kenkyū-buntansha) |
SAKUMA Keiko 女子栄養大学, 栄養学部, 教授 (20076160)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2008: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2007: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 遺伝子発現 / ラット / カルシウム吸収 / ビタミンK / カルシウムチャネル |
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| Research Abstract |
Recently, a novel mechanism of vitamin K functions via transcriptional regulation as a ligand for steroid and xenobiotic receptor (SXR) in osteoblastic cells was reported. Three genes, TRPV6, calbindin-D9k and PMCA1b were determined to be involved in the process of calcium absorption in the mucosal cells of intestine and induced gene expression by vitamin D.SXR is also expressed at high level in intestine and SXR-binding site contains binding motifs for vitamin D receptor (VDR). Therefore we expected that vitamin K bound to VDR binding motif and regulated the expression of genes that were involved in calcium absorption in intestine. Colon cancer cell line SW-480 revealed the increase of the TRPV6 mRNA expression by the addition of vitamin K2. In this study, we fed rats vitamin K supplemented diet and analyzed the change of expression of TRPV6 and calbindin-D9k mRNA. The vitamin K diet increased expression of TRPV6 and calbindin-D9k.
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