| ○種別 (必須): | □ | 総説·解説
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| ○言語 (必須): | □ | 英語
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| ○学究種別 (推奨): |
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| ○著者 (必須): | 1. | (英) Suzuki Masakazu (日) (読)
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| 2. | 長谷川 敬展 ([徳島大学.大学院医歯薬学研究部.歯学域.口腔科学部門.基礎歯学系.口腔分子生理学])
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| 3. | (英) Ogushi Yuji (日) (読)
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| 4. | (英) Tanaka Shigeyasu (日) (読)
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| ○題名 (必須): | □ | (英) Amphibian aquaporins and adaptation to terrestrial environments: a review. (日)
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| ○要約 (任意): | □ | (英) In many anurans, the pelvic patch of the ventral skin and the urinary bladder are important osmoregulatory organs. Since the discovery of water channel protein, aquaporin (AQP), in mammalian erythrocytes, 17 distinct full sequences of AQP mRNAs have been identified in anurans. Phylogenetic tree of AQP proteins from amphibians and mammals suggested that anuran AQPs can be divided into six types: i.e. types 1, 2, 3, and 5, and anuran-specific types a1 and a2. Among them, two types of anuran AQPs (types 1 and a2) are localized in the skin and urinary bladder by immunohistochemistry. Tree frog type-a2 AQPs, AQP-h2 and AQP-h3, are vasotocin-regulated water channels predominant in the osmoregulatory organs. Both the AQP-h2 and AQP-h3 are expressed at the granular cells underneath the keratinized layer in the pelvic patch, whereas only AQP-h2 is detected at the granular cells in the urinary bladder. In response to vasotocin, both the molecules seem to be translocated from the cytoplasmic pool to the apical plasma membrane of the granular cells. On the other hand, type-1 AQPs, Rana FA-CHIP and Hyla AQP-h1, are detected at the endothelial cells of blood capillaries in frog osmoregulatory organs. These findings suggest that AQP-h2 and AQP-h3 are key players for transepithelial water movement, and that FA-CHIP and AQP-h1 might be important for the transport of absorbed water into the blood flow. Comparative investigation of type-a2 AQPs in anurans further revealed that AQP-h2 and -h3-like molecules might exist at the urinary bladder and the pelvic skin, respectively, in various anurans from aquatic species to arboreal dwellers. AQP-h2-like protein is also detected in the pelvic skin of terrestrial and arboreal species. It is possible that this molecule might have occurred in the pelvic skin as anurans penetrated into drier environments. (日)
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| ○キーワード (推奨): | 1. | (英) Adaptation, Physiological (日) (読)
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| 2. | (英) Amino Acid Sequence (日) (読)
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| 3. | (英) Amphibians (日) (読)
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| 4. | (英) Animals (日) (読)
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| 5. | (英) Ecosystem (日) (読)
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| 6. | (英) Molecular Sequence Data (日) (読)
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| ○発行所 (推奨): |
| ○誌名 (必須): | □ | Comparative Biochemistry and Physiology. Part A: Molecular & Integrative Physiology ([Elsevier])
(pISSN: 1095-6433, eISSN: 1531-4332)
| ○ISSN (任意): | □ | 1095-6433
ISSN: 1095-6433
(pISSN: 1095-6433, eISSN: 1531-4332) Title: Comparative biochemistry and physiology. Part A, Molecular & integrative physiologyTitle(ISO): Comp Biochem Physiol A Mol Integr PhysiolPublisher: Elsevier BV (NLM Catalog)
(Scopus)
(CrossRef)
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| ○巻 (必須): | □ | 148
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| ○号 (必須): | □ | 1
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| ○頁 (必須): | □ | 72 81
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| ○年月日 (必須): | □ | 西暦 2007年 9月 初日 (平成 19年 9月 初日)
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| ○DOI (任意): | □ | 10.1016/j.cbpa.2006.12.021 (→Scopusで検索)
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| ○PMID (任意): | □ | 17270476 (→Scopusで検索)
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| ○備考 (任意): | 1. | (英) Article.Affiliation: Department of Biology, Faculty of Science, Shizuoka University, Ohya 836, Suruga ward, Shizuoka city, Shizuoka 422-8529, Japan. sbmsuzu@ipc.shizuoka.ac.jp (日)
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| 2. | (英) Article.PublicationTypeList.PublicationType: Journal Article (日)
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| 3. | (英) Article.PublicationTypeList.PublicationType: Research Support, Non-U.S. Gov't (日)
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| 4. | (英) Article.PublicationTypeList.PublicationType: Review (日)
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| 5. | (英) NumberOfReferences: 62 (日)
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