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series of enzyme-catalysed reactions. The efficiency of each enzyme may vary, for example, in a genetically determined manner, so that each step in the pathway may become rate limiting to a greater or lesser extent. This phenomenon is well documented in a
Department of Physiology, University of Medicine 2, Yangon, Myanmar
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. 2002 ). Therefore, the contribution of renal gluconeogenesis to plasma glucose levels should not be neglected. The rate-limiting enzymes for gluconeogenesis are phosphoenolpyruvate carboxykinase (PEPCK), glucose-6-phosphatase (G6Pase) and fructose-1
Departments of Pathology, Dermatology, Biological Science Laboratories, Departments of Dermatology, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan
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enzymes have been reported for a variety of peripheral tissues ( Belanger et al . 2002 , Yanase et al . 2003 ), which indicates that sex steroids are locally biosynthesized in an ‘intracrine’ manner. This peripheral production of sex steroids has been
Department of Obstetrics & Gynaecology, Hokkaido Graduate School of Medicine, Kita-ku, Kita 15, Nishi 7, Sapporo 060-8638, Japan
Department of Animal Science, Faculty of Agriculture, Kobe University, Kobe 657-8501, Japan
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Department of Obstetrics & Gynaecology, Hokkaido Graduate School of Medicine, Kita-ku, Kita 15, Nishi 7, Sapporo 060-8638, Japan
Department of Animal Science, Faculty of Agriculture, Kobe University, Kobe 657-8501, Japan
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Department of Obstetrics & Gynaecology, Hokkaido Graduate School of Medicine, Kita-ku, Kita 15, Nishi 7, Sapporo 060-8638, Japan
Department of Animal Science, Faculty of Agriculture, Kobe University, Kobe 657-8501, Japan
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Introduction Steroid sulfatase (STS) (EC 3.I.6.2) is present in various mammalian tissues, such as the liver, ovary and testis, and is especially abundant in the placenta ( Warren & French 1965 ). This enzyme is a membrane
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Departments of Physiology and Biophysics, Morphology, Department of Biochemistry and Molecular Biology, Max‐Delbrück Center for Molecular Medicine (MDC), Biological Sciences Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
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Introduction Santos et al . (1988) described the formation of the heptapeptide angiotensin (Ang)-(1–7) from Ang I by an Ang-converting enzyme (ACE)-independent pathway. In the same year, Schiavone et al . (1988) published the first report of a
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. Thus prednisone, cortisone and DHC are inactive and require modification at the 11beta position to have glucocorticoid action ( Fig. 1 ). The intracellular enzymes that mediate this modification are the 11β-hydroxysteroid dehydrogenases (11β
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. 2008 ). Also, in hepatocytes, insulin degradation is mediated primarily by the insulin-degrading enzyme (IDE; Valera Mora et al . 2003 ). While increased insulin secretion and reduced insulin sensitivity have been extensively described and studied in
Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
Northwest Fisheries Science Center, NOAA Fisheries, Seattle, Washington 98112, USA
Center for Reproductive Biology, Washington State University, Pullman, Washington 99164, USA
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Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
Northwest Fisheries Science Center, NOAA Fisheries, Seattle, Washington 98112, USA
Center for Reproductive Biology, Washington State University, Pullman, Washington 99164, USA
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Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
Northwest Fisheries Science Center, NOAA Fisheries, Seattle, Washington 98112, USA
Center for Reproductive Biology, Washington State University, Pullman, Washington 99164, USA
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Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
Northwest Fisheries Science Center, NOAA Fisheries, Seattle, Washington 98112, USA
Center for Reproductive Biology, Washington State University, Pullman, Washington 99164, USA
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Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
Northwest Fisheries Science Center, NOAA Fisheries, Seattle, Washington 98112, USA
Center for Reproductive Biology, Washington State University, Pullman, Washington 99164, USA
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. In mammals, FSH and LH primarily regulate steroid production through control of steroidogenic enzyme gene expression ( Richards 1994 ). Binding of FSH or LH to their specific cell-surface receptors leads to the production of second messenger molecules
Department of surgery, Laval University, 2705 Laurier Boulevard (T3-67), Québec, Québec, Canada G1V 4G2
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Department of surgery, Laval University, 2705 Laurier Boulevard (T3-67), Québec, Québec, Canada G1V 4G2
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metabolically active organ which possesses endocrine, paracrine, and autocrine hormonal properties is increasingly recognized ( Mohamed-Ali et al. 1998 , Kershaw & Flier 2004 ). In this regard, several steroid-converting enzymes involved in local sex steroid
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acylation status, the peptide can be termed unacylated ghrelin (UAG) or acylated-ghrelin (AG), AG being the initially identified peptide ( Kojima et al . 1999 ), which corresponds to the active peptide able to bind its canonical receptor, GHSR1a. The enzyme