| Project/Area Number |
23570172
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Functional biochemistry
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| Research Institution | Keio University |
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Principal Investigator |
KABE Yasuaki 慶應義塾大学, 医学部, 講師 (20397037)
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| Co-Investigator(Renkei-kenkyūsha) |
ISHIMORI Koichiro 北海道大学, 理学部, 教授 (20192487)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | ヘム / 赤血球分化 / 金属タンパク質 / アポトーシス |
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| Research Abstract |
During erythropoiesis, haem synthesis is significantly induced, and abundant haem is utilized as hemoglobin in erythroid cells. However, excessive haem results in cell damages by membrane oxidation. In the present study, we found that haem directly bound to heat shock protein 27 (HSP27) by affinity purification. HSP27 is a small heat shock family protein, which plays an important role for cytoprotection, stress tolerance, cellular differentiation or tissue development. It has been known that the multimerized HSP27 dissociates by several stimuli. Interestingly, exposure of haem directly dissociated the multimerized HSP27 in vivo and in vitro. Knockdown of HSP27 expression resulted in the haem-induced apoptosis and reduced the haemin-induced erythroid differentiation. Furthermore, we also found that HSP27 is essential for erythroid differentiation by using HSP27 knockdown mice.
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