2007 Fiscal Year Final Research Report Summary
Characteristic analysis and therapeutic development in rdw rats with congenital hypothyroidism
| Project/Area Number |
17500289
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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 |
Laboratory animal science
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| Research Institution | Kitasato University |
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Principal Investigator |
FURUDATE Sen-ichi Kitasato University, School of Medicine, Associate Professor (80095512)
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| Co-Investigator(Kenkyū-buntansha) |
SAKAI Yasuhiiro Kitasato university, School of Medicine, Associate Professor (00050625)
AZUMA Sadahiro Kitasato university, School of Medicine, Research Associate (80348507)
SUZUKI Nobuyuki Kitasato university, School of Applied Health Sciences, Associate Professor (10050650)
OH-ISHI Masamichi Kitasato university, School of Science, Assistant Professor (40233027)
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| Project Period (FY) |
2005 – 2007
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| Keywords | rdw / congenital hypothyroidism / non-goiter / ancreatic uroteome / dopamine D_2-like receptor / thyroid hormone / mutant Tg-ERp72 interaction / molecular chaperon |
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| Research Abstract |
A mutation in the Thyroglobulin (Tg) gene (Tg-G2320R) is the primary cause of hereditary dwarfism and hypothyroidism in the rdw rat.
1) Elastase and lipase reduced in pancreatic proteome and those proteins recovered by thyroxine injection or thyroid graft. 2) The Tg-G2320R mutation is responsible for congenital hypothyroidism in rdw rats, in which a lack of secondary thyroid enlargement (goiter) implicates death of thyrocytes as part of desease pathogenesis. We found that mutant Tg-G2320R was retained within the ER with no detectable synthesis of thyroxine, had persistent exposure of free chiols, and was associated with activated ER stress response but incomplete ER associated degradation (ERAD). Tg-G2320R associated with multiple ER resident proteins, most notably ERp72, including covalent Tg-ERp72 interactions. In PC C13 thyrocytes, inducible overexpression of ERp72 increased the ability of cells to maintain Tg cysteines in a reduced state. Non covalent interactions of several ER chaperones with newly synthesized Tg-G2320R diminished over time in paralled with ERAD of the mutant protein, yet a small ERAD-resistant Tg fraction remained engaged in covalent association with ERp72 even 2 days post-synthesis. Such covalent protein aggregates may set the stage for apoptotic thyrocyte cell death, preventing thyroid, goiter formation in rdw rats. 3) Dopamine D2-like receptor function is converted from excitatory to inhibitory by thyroxine in the developmental hippocampus using rdw rats having deficient thyroid hormone. 4) The infertility of rdw male rats was recovered by thyroid graft.
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Research Products
(27 results)
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[Journal Article] Oxidoreductase interactions include a role for ERp72 engagement with mutant thyroglobulin from the rdw/rdw rat dwarf2007
Author(s)
Menon, S., Lee, J., Abplanalp, WA., Yoo, S-E., Agui, T., Furudate, S., Kim, PS., Aryan, P
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Journal Title
J Bio Chem 282(9)
Pages: 6183-6191
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Effect of thyroxine on abnormal pancreatic proteomes of the hypothyroid rdw rat2005
Author(s)
Satoh, M., Haruta-Satoh, E., Omori, A., Oh-Ishi, M., Kodera, Y., Furudate, S., Maeda, T
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Journal Title
Proteomics 5
Pages: 1113-1124
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Rescue from dwarfism by thyroid function conpensation in rdw rats2005
Author(s)
Furudate, S., Ono, M., Shibayama, K., Ohyama, Y., Kuwada, M., Kimura, Y., Kamaya, T
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Journal Title
Exp Anim 54(5)
Pages: 455-460
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Short- and long-term synaptic plasticity in area CAl pf the hippo-campus in adult rdw/rdw rats with congenital hypothyroidism campus in adult rdw/rdw rats with congenital hypothyroidism2007
Author(s)
Oh-Nishi, A., Suzuki, N., Azuma, S., Ishihara, Y., Katada, R., Furudate, S
Organizer
The 32th of The Japan for Comparative Endocrinology
Place of Presentation
Nikko
Year and Date
20071012-13
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Proteome analysis of thyroid from the hypothyroid dwarf mouse
Author(s)
Watase, A., Suzuki, T., Yasuoka, Y., Takabayashi, S., Katoh, H., Nakamura, K., Oh-Ishi, M., Nagata, E., Furudate, S
Organizer
The 54th Annual Meeting of Japanese Association for Laboratory Animal Science
Description
「研究成果報告書概要(欧文)」より
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