Developmental Profile of Annexin IX and its Possible Role in Programmed Cell Death of the Bombyx mori Anterior Silk Gland(Developmental Biology)
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概要
- 論文の詳細を見る
During pupal metamorphosis, the anterior silk gland (ASG) of the silkworm, Bombyx mori, undergoes programmed cell death (PCD), which is triggered by 20-hydroxyecdysone (20E). Annexin IX (ANX IX) has been identified as a 20E-inducible gene in dying ASGs, and we show here that its expression is down-regulated in tissues destined to die but not in tissues that survive pupal metamorphosis. ANX IX expression was high in the ASGs during the feeding period, when the ecdysteroid liter was low, and decreased in response to the rising ecdysteroid titer that triggered pupal metamorphosis. Before gut purge, in vitro exposure of the ASGs to 20E levels corresponding to the ecdysteroid concentration present at the time of gut purge caused a decrease in ANX IX messenger RNA levels. Expression profiles of EcR and USP, and the 20E concentration-responses of these genes, indicate the importance of the relative abundance of EcR-A and EcR-B1 isoforms in ANX IX regulation. These results suggest an involvement of ANX IX in the determination of PCD timing by delaying or suppressing the response to the increase in hemolymph ecdysteroid concentration during the prepupal period.
- 社団法人日本動物学会の論文
- 2006-06-25
著者
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Imamura Masanori
Dep. Of Biology Fac. Of Sci. Kanazawa Univ. Kanazawa 920-1192 Jpn
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Iwami Masafumi
Division Of Life Science Graduate School Of Natural Science And Technology Kanazawa University
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Iwami M
Kanazawa Univ. Kanazawa
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Iwami Masafumi
Division Of Life Science Graduate School Of Natural Science And Technology And Department Of Biology
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Sakurai Sho
Division Of Life Sciences Graduate School Of Natural Science And Technology Kanazawa University
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Sakurai Sho
Division Of Life Science Graduate School Of Natural Science And Technology Kanazawa University:depar
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Koyama Takashi
Division Of Life Sciences Graduate School Of Natural Science And Technology Kanazawa University
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Takaki K
Division Of Life Sciences Graduate School Of Natural Science And Technology Kanazawa University
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Sakurai S
Div. Of Life Sciences Graduate School Of Natural Sci. And Technol. Kanazawa Univ.
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Sakurai S
Kanazawa Univ. Kanazawa
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Koyama Takashi
Department Of Microbiology College Of Pharmacy Nihon University
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Kaneko Yu
Division of Life Sciences, Graduate School of Natural Science and Technology, Kanazawa University
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Takaki Keiko
Division of Life Sciences, Graduate School of Natural Science and Technology, Kanazawa University
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Salam Salah
Division Of Life Science Graduate School Of Natural Science And Technology And Department Of Biology
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Kaneko Yu
Division Of Life Sciences Graduate School Of Natural Science And Technology Kanazawa University
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Takaki Keiko
Division Of Life Sciences Graduate School Of Science And Technology Kanazawa University
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Iga Masatoshi
Division Of Life Sciences Graduate School Of Natural Science And Technology Kanazawa University
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Iwami Masafumi
Div. Of Life Sciences Graduate School Of Natural Sci. And Technol. Kanazawa Univ.
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Sakurai Sho
Div. Of Life Sciences Graduate School Of Natural Sci. And Technol. Kanazawa Univ.
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Takaki Keiko
Division of Biological Measurement and Applications, Institute of Nature and Environmental Technology, Kanazawa University
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