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M. WALLIS
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N. KOVAČIĆ
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Hayashida & Li (1958) and Hayashida (1962) reported that ox growth hormone produced antibodies against ox lactogenic hormone, a serum protein and the growth hormone itself, but Chadwick, Folley & Gemzell (1961) obtained negative results with ox growth hormone in the bioassay for lactogenic hormone. Ferguson & Wallace (1963) found that the electrophoretic bands characteristic of prolactin could be detected on starch-gel electrophoretograms of some ox growth hormone preparations.

The purpose of this communication is to show the results of assays of various ox growth hormone preparations for the presence of prolactin, as measured by the deciduoma method (Kovačić, 1963). In this method the formation of deciduomata in the damaged uterine horn of adult hypophysectomized mice is used as the endpoint. In the mouse, prolactin has luteotrophic properties; it is believed that luteal cells secrete progesterone, which causes decidual reactions.

The results of assays for prolactin on two preparations (72-GH-1

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C M Allan Andrology Laboratory, ANZAC Research Institute, University of Sydney, Concord Hospital, New South Wales 2139, Australia
Department of Reproductive Medicine, Westmead Hospital, University of Sydney, New South Wales 2145, Australia

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Y Wang Andrology Laboratory, ANZAC Research Institute, University of Sydney, Concord Hospital, New South Wales 2139, Australia
Department of Reproductive Medicine, Westmead Hospital, University of Sydney, New South Wales 2145, Australia

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M Jimenez Andrology Laboratory, ANZAC Research Institute, University of Sydney, Concord Hospital, New South Wales 2139, Australia
Department of Reproductive Medicine, Westmead Hospital, University of Sydney, New South Wales 2145, Australia

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B Marshan Andrology Laboratory, ANZAC Research Institute, University of Sydney, Concord Hospital, New South Wales 2139, Australia
Department of Reproductive Medicine, Westmead Hospital, University of Sydney, New South Wales 2145, Australia

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J Spaliviero Andrology Laboratory, ANZAC Research Institute, University of Sydney, Concord Hospital, New South Wales 2139, Australia
Department of Reproductive Medicine, Westmead Hospital, University of Sydney, New South Wales 2145, Australia

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P Illingworth Andrology Laboratory, ANZAC Research Institute, University of Sydney, Concord Hospital, New South Wales 2139, Australia
Department of Reproductive Medicine, Westmead Hospital, University of Sydney, New South Wales 2145, Australia

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D J Handelsman Andrology Laboratory, ANZAC Research Institute, University of Sydney, Concord Hospital, New South Wales 2139, Australia
Department of Reproductive Medicine, Westmead Hospital, University of Sydney, New South Wales 2145, Australia

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Introduction Follicle-stimulating hormone (FSH) is critical for ovarian folliculogenesis and female fertility. FSH plays a key role in antral follicle development and, in combination with luteinizing hormone (LH), stimulates

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E Oliveira Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute

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C R Pinheiro Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute

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A P Santos-Silva Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute

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I H Trevenzoli Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute

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Y Abreu-Villaça Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute

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J F Nogueira Neto Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute
Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute

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A M Reis Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute

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M C F Passos Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute
Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute

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E G Moura Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute

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P C Lisboa Department of Physiological Sciences, Laboratory of Lipids, Department of Physiology and Biophysics, Department of Applied Nutrition, Roberto Alcantara Gomes Biology Institute

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processes including the secretion of hormones, such as ADH, GH, ACTH, cortisol, catecholamines, and leptin ( Robinson 1977 , Yeh & Barbieri 1989 , Grassi et al . 1994 , Walker et al . 1999 ). In normal men, smoking causes an increase in heart rate and

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Xianxian Huang Pharmaceutical College, Guangxi Medical University, Nanning, Guangxi, China

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Jing Liu Pharmaceutical College, Guangxi Medical University, Nanning, Guangxi, China

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Guangquan Peng Pharmaceutical College, Guangxi Medical University, Nanning, Guangxi, China

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Mingyue Lu Pharmaceutical College, Guangxi Medical University, Nanning, Guangxi, China

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Zhongbo Zhou School of Pharmacy, Youjiang Medical University for Nationalities, Baise, Guangxi, China

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Neng Jiang Pharmaceutical College, Guangxi Medical University, Nanning, Guangxi, China

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Zhiming Yan Pharmaceutical College, Guangxi Medical University, Nanning, Guangxi, China

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obesity also have T2DM ( Su et al. 2015 ). The exploration of gut hormones has been ongoing for over a century, dating back to La Barre’s introduction of the concept of ‘incretin’ in 1932 ( Kim & Egan 2008 ). From the isolation of the first gut hormone

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F Wahab Stem Cell Biology Unit, Laboratory of Reproductive Neuroendocrinology, Leibniz Institute for Primate Research, German Primate Center, Kellnerweg 4, D-37077 Göttingen, Germany

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M Shahab Stem Cell Biology Unit, Laboratory of Reproductive Neuroendocrinology, Leibniz Institute for Primate Research, German Primate Center, Kellnerweg 4, D-37077 Göttingen, Germany

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R Behr Stem Cell Biology Unit, Laboratory of Reproductive Neuroendocrinology, Leibniz Institute for Primate Research, German Primate Center, Kellnerweg 4, D-37077 Göttingen, Germany

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Introduction Reproduction in nonprimate mammals and in primates is highly responsive to metabolic alterations ( Cameron 1991 , Wade & Jones 2004 ). Deficiencies of metabolic fuels prevent the proper release of gonadotropin releasing hormone (GnRH

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Joachim Wistuba Institute of Reproductive Medicine of the University, Domagkstr. 11, 48149 Münster, Germany
Department of Neuroendocrinology, Max-Planck-Institute for Experimental Endocrinology, Feodor-Lynen-Str. 7, 30625 Hannover, Germany

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Jens Mittag Institute of Reproductive Medicine of the University, Domagkstr. 11, 48149 Münster, Germany
Department of Neuroendocrinology, Max-Planck-Institute for Experimental Endocrinology, Feodor-Lynen-Str. 7, 30625 Hannover, Germany

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C Marc Luetjens Institute of Reproductive Medicine of the University, Domagkstr. 11, 48149 Münster, Germany
Department of Neuroendocrinology, Max-Planck-Institute for Experimental Endocrinology, Feodor-Lynen-Str. 7, 30625 Hannover, Germany

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Trevor G Cooper Institute of Reproductive Medicine of the University, Domagkstr. 11, 48149 Münster, Germany
Department of Neuroendocrinology, Max-Planck-Institute for Experimental Endocrinology, Feodor-Lynen-Str. 7, 30625 Hannover, Germany

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Ching-Hei Yeung Institute of Reproductive Medicine of the University, Domagkstr. 11, 48149 Münster, Germany
Department of Neuroendocrinology, Max-Planck-Institute for Experimental Endocrinology, Feodor-Lynen-Str. 7, 30625 Hannover, Germany

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Eberhard Nieschlag Institute of Reproductive Medicine of the University, Domagkstr. 11, 48149 Münster, Germany
Department of Neuroendocrinology, Max-Planck-Institute for Experimental Endocrinology, Feodor-Lynen-Str. 7, 30625 Hannover, Germany

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Karl Bauer Institute of Reproductive Medicine of the University, Domagkstr. 11, 48149 Münster, Germany
Department of Neuroendocrinology, Max-Planck-Institute for Experimental Endocrinology, Feodor-Lynen-Str. 7, 30625 Hannover, Germany

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Introduction Thyroid hormones (TH) are essential for development, growth, metabolism, and reproduction ( Porterfield & Hendrich 1993 , Oppenheimer & Schwartz 1997 , Anderson et al. 2003 , Choksi et al. 2003 , Bernal 2005

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Emilio Hirsch Dipartimento di Genetica, Biologia e Biochimica, Molecular Biotechnology Center, University of Torino, Via Nizza 52, Torino 10126, Italy

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Carlotta Costa Dipartimento di Genetica, Biologia e Biochimica, Molecular Biotechnology Center, University of Torino, Via Nizza 52, Torino 10126, Italy

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Elisa Ciraolo Dipartimento di Genetica, Biologia e Biochimica, Molecular Biotechnology Center, University of Torino, Via Nizza 52, Torino 10126, Italy

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Signal transduction: a matter of amplifiers Homeostasis of multicellular organisms requires precise communication between different cells. The paradigm of hormonal function defines a cellular source of signals and a definite

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S. Harvey
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Introduction

Growth hormone (GH) secretion has traditionally been considered to be under dual hypothalamic control, being stimulated by a GH-releasing factor (GRF) and suppressed by somatostatin (SRIF), an inhibitory releasing factor (Müller, 1987). These hypothalamic peptides are released into hypophysial circulation in response to stimuli in the internal and external environment, and act at receptors on somatotroph cells to regulate GH synthesis and release. Hypophysial portal plasma, however, also transports other hypophysiotrophic factors to the pituitary gland, and somatotrophs are undoubtedly exposed to other putative GRFs.

Thyrotrophin-releasing hormone (TRH; pGlu-His-Pro-NH2) was the first hypophysiotrophic peptide to be isolated and synthesized chemically and was called TRH because it was found to stimulate thyrotrophin (TSH) release from the pituitary gland (Nelson, 1982). However, since its discovery, TRH has been found to be synthesized in numerous locations throughout the 'diffuse neuroendocrine system', and in addition to its neuroendocrine role in the regulation of

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J T Potts Jr
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T J Gardella
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H Jüppner
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H M Kronenberg
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Introduction

The biological role of parathyroid hormone (PTH) in calcium and bone metabolism has interested our laboratory for 35 years. Original studies focused on isolation, chemical analysis, and synthesis of the hormone as well as development and application of immunoassays to analyze its physiological role. More recently the cloning of genes that encode the hormone and the PTH receptor have provided important tools for a more detailed analysis of hormone action at the molecular and cellular levels.

In addition to its vital physiological role in calcium homeostasis PTH is interesting from a medical perspective both in disorders of excess or deficient PTH production (hyperparathyroidism and hypoparathyroidism respectively) and in its potential use as a therapeutic agent in osteoporosis.

This review will focus on the current state of our knowledge of the hormone and its receptor and our recent efforts to map key molecular interactions between the hormone and

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Nirun Hewawasam School of Life and Health Sciences, University of Roehampton, London, UK

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Debalina Sarkar School of Life and Health Sciences, University of Roehampton, London, UK

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Olivia Bolton School of Life and Health Sciences, University of Roehampton, London, UK

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Blerinda Delishaj School of Life and Health Sciences, University of Roehampton, London, UK

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Maha Almutairi School of Life and Health Sciences, University of Roehampton, London, UK

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Aileen J F King Department of Diabetes, School of Cardiovascular and Metabolic Medicine & Sciences, King’s College London, London, UK

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Ayse S Dereli Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Pôle d’Endocrinologie, Diabète et Nutrition, Brussels, Belgium

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Chloe Despontin Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Pôle d’Endocrinologie, Diabète et Nutrition, Brussels, Belgium

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Patrick Gilon Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Pôle d’Endocrinologie, Diabète et Nutrition, Brussels, Belgium

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Sue Reeves School of Life and Health Sciences, University of Roehampton, London, UK

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Michael Patterson School of Life and Health Sciences, University of Roehampton, London, UK

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Astrid C Hauge-Evans School of Life and Health Sciences, University of Roehampton, London, UK

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’Kadmi et al. 2019 ). Ghrelin is an orexigenic hormone regulating a range of physiological functions including appetite, food intake, adiposity, energy metabolism, and glucose homeostasis via interaction with GHSR1a ( Kojima et al. 1999 , Wren et al

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