Transcriptional Regulation of Rat Calbindin Expression during Development Determined by Bacterially Expressed Protein
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概要
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Calbindin-D9k expression in intestinal mucosal cells reveals a specific pattern during development in rats. It shows a low basal level in suckling and adult rats, but after weaning at 21 d of age, increases to three times that of the basal level for several days only, around 24 d. We attempted to clarify whether the regulation of developmental change was at the transcriptional or post-transcriptional level. The calbindin-D9k protein and mRNA concentrations during pre- and postweaned de-velopment were determined by Western blot and Northern blot analysis, respectively, and compared with calcium binding activity by 45Ca. For Western blot analysis, a corresponding antibody was raised in rabbit using a bacterially expressed fusion protein, glutathione S-transferase (GST, EC 2.5.1.18), and calbindin-D9k. Calbindin-D9k cDNA was linked to a GST gene within a molecule of vector plasmid and a fusion protein was expressed in Escherichia coll. There were significant (p<0.001) correlations between calbindin-D9k protein, mRNA concentrations and calcium-binding ac-tivity: r=0.90 for protein vs. mRNA, r=0.93 for protein vs. binding activity and r=0.95 for mRNA vs. binding activity. These results indicate that calbindin-D9k expression during postnatal development is regulated at the transcriptional level.
- 財団法人 学会誌刊行センターの論文
著者
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Miwa Yoshikazu
Dep. Of Clinical Pharmacology Fac. Of Medical Sciences Kyushu Univ. Jpn
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Miwa Yoshikazu
Department Of Clinical Pharmacology Graduate School Of Medical Sciences Kyushu University
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Motohashi Y
Department Of Internal Medicine Keio University School Of Medicine
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Motohashi Yoshiko
慶応義塾大学 医学部
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Fukushima Akiko
Department Of Molecular Nutrition Kagawa Nutrition University
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Fukushima Akiko
Department Of Director Nursing Fukuda Hospital
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Fukushima Akiko
National Institute Of Advanced Industrial Science And Technology (aist) Spintronics Research Center
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MOTOHASHI Yasuko
Laboratory of Molecular Nutrition, Department of Nutrition
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SAKUMA Keiko
Laboratory of Molecular Nutrition, Department of Nutrition
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Motohashi Yasuko
Department Of Molecular Nutrition Kagawa Nutrition University
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FUKUSHIMA Akiko
Department of Biochemistry, Saitama Medical School, Moroyama, Iruma-gun
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