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Reproductive Neuroscience Unit (T.L.H., S.D.), Department of Obstetrics and Gynecology and Department of Neurobiology (T.L.H.), Yale Medical School, New Haven, Connecticut 06520; Department of Anatomy and Histology (P.S.), Faculty of Veterinary Science, Szent Istvan University, Budapest, Hungary 1400; and Lilly Research Laboratories (M.H., M.T.), Eli Lilly & Co., Indianapolis, Indiana 46285
Address all correspondence and requests for reprints to: Tamas Horvath, Department of Obstetrics/Gynecology, Yale Medical School, 333 Cedar Street, FMB 339, New Haven, Connecticut 06520. E-mail: tamas.horvath{at}yale.edu
The recently discovered hormone, ghrelin, has been recognized as an important regulator of GH secretion and energy homeostasis. Orexigenic and adipogenic ghrelin is produced by the stomach, intestine, placenta, pituitary, and possibly in the hypothalamus. The concentration of circulating ghrelin, principally derived from the stomach, is influenced by acute and chronic changes in nutritional state. To date, most studies focused on the role of ghrelin in GH secretion or its function in complementing leptin action to prevent energy deficits. The potential significance of ghrelin in the etiology of obesity and cachexia as well as in the regulation of growth processes is the subject of ongoing discussions. A large quantity of information based on clinical trials and experimental studies with ghrelin and previously available synthetic ghrelin receptor agonists (GH secretagogues) must now be integrated with a rapidly increasing amount of data on the central regulation of metabolism and appetite. In this overview, we summarize recent findings and strategies on the integration of ghrelin into neuroendocrine networks that regulate energy homeostasis.
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C. Gauna, F. M. Meyler, J. A. M. J. L. Janssen, P. J. D. Delhanty, T. Abribat, P. van Koetsveld, L. J. Hofland, F. Broglio, E. Ghigo, and A. J. van der Lely Administration of Acylated Ghrelin Reduces Insulin Sensitivity, Whereas the Combination of Acylated Plus Unacylated Ghrelin Strongly Improves Insulin Sensitivity J. Clin. Endocrinol. Metab., October 1, 2004; 89(10): 5035 - 5042. [Abstract] [Full Text] [PDF] |
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K. A. Brownley, K. C. Light, K. M. Grewen, E. E. Bragdon, A. L. Hinderliter, and S. G. West Postprandial Ghrelin Is Elevated in Black Compared with White Women J. Clin. Endocrinol. Metab., September 1, 2004; 89(9): 4457 - 4463. [Abstract] [Full Text] [PDF] |
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N. Ueno, M. G. Dube, A. Inui, P. S. Kalra, and S. P. Kalra Leptin Modulates Orexigenic Effects of Ghrelin and Attenuates Adiponectin and Insulin Levels and Selectively the Dark-Phase Feeding as Revealed by Central Leptin Gene Therapy Endocrinology, September 1, 2004; 145(9): 4176 - 4184. [Abstract] [Full Text] [PDF] |
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R. J. A. James, R. F. Drewett, and T. D. Cheetham Low Cord Ghrelin Levels in Term Infants Are Associated with Slow Weight Gain Over the First 3 Months of Life J. Clin. Endocrinol. Metab., August 1, 2004; 89(8): 3847 - 3850. [Abstract] [Full Text] [PDF] |
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K. H. Schulpis, I. Papassotiriou, M. Vounatsou, G. A. Karikas, S. Tsakiris, and G. P. Chrousos Morning Preprandial Plasma Ghrelin and Catecholamine Concentrations in Patients with Phenylketonuria and Normal Controls: Evidence for Catecholamine-Mediated Ghrelin Regulation J. Clin. Endocrinol. Metab., August 1, 2004; 89(8): 3983 - 3987. [Abstract] [Full Text] [PDF] |
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J. R. Speakman Obesity: The Integrated Roles of Environment and Genetics J. Nutr., August 1, 2004; 134(8): 2090S - 2105S. [Abstract] [Full Text] [PDF] |
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U. Hanusch-Enserer, E. Cauza, G. Brabant, A. Dunky, H. Rosen, G. Pacini, H. Tuchler, R. Prager, and M. Roden Plasma Ghrelin in Obesity before and after Weight Loss after Laparoscopical Adjustable Gastric Banding J. Clin. Endocrinol. Metab., July 1, 2004; 89(7): 3352 - 3358. [Abstract] [Full Text] [PDF] |
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M. J. De Souza, H. J. Leidy, E. O'Donnell, B. Lasley, and N. I. Williams Fasting Ghrelin Levels in Physically Active Women: Relationship with Menstrual Disturbances and Metabolic Hormones J. Clin. Endocrinol. Metab., July 1, 2004; 89(7): 3536 - 3542. [Abstract] [Full Text] [PDF] |
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E. Lin, N. Gletsu, K. Fugate, D. McClusky, L. H. Gu, J.-L. Zhu, B. J. Ramshaw, D. A. Papanicolaou, T. R. Ziegler, and C. D. Smith The Effects of Gastric Surgery on Systemic Ghrelin Levels in the Morbidly Obese Arch Surg, July 1, 2004; 139(7): 780 - 784. [Abstract] [Full Text] [PDF] |
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A. J. van der Lely, M. Tschop, M. L. Heiman, and E. Ghigo Biological, Physiological, Pathophysiological, and Pharmacological Aspects of Ghrelin Endocr. Rev., June 1, 2004; 25(3): 426 - 457. [Abstract] [Full Text] [PDF] |
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K. L. Teff, S. S. Elliott, M. Tschop, T. J. Kieffer, D. Rader, M. Heiman, R. R. Townsend, N. L. Keim, D. D'Alessio, and P. J. Havel Dietary Fructose Reduces Circulating Insulin and Leptin, Attenuates Postprandial Suppression of Ghrelin, and Increases Triglycerides in Women J. Clin. Endocrinol. Metab., June 1, 2004; 89(6): 2963 - 2972. [Abstract] [Full Text] [PDF] |
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T. L. Horvath, S. Diano, and M. Tschop Brain Circuits Regulating Energy Homeostasis Neuroscientist, June 1, 2004; 10(3): 235 - 246. [Abstract] [PDF] |
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A. Dzaja, M. A. Dalal, H. Himmerich, M. Uhr, T. Pollmacher, and A. Schuld Sleep enhances nocturnal plasma ghrelin levels in healthy subjects Am J Physiol Endocrinol Metab, June 1, 2004; 286(6): E963 - E967. [Abstract] [Full Text] [PDF] |
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C. Y. Bowers, R. Granda, S. Mohan, J. Kuipers, D. Baylink, and J. D. Veldhuis Sustained Elevation of Pulsatile Growth Hormone (GH) Secretion and Insulin-Like Growth Factor I (IGF-I), IGF-Binding Protein-3 (IGFBP-3), and IGFBP-5 Concentrations during 30-Day Continuous Subcutaneous Infusion of GH-Releasing Peptide-2 in Older Men and Women J. Clin. Endocrinol. Metab., May 1, 2004; 89(5): 2290 - 2300. [Abstract] [Full Text] [PDF] |
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S. V. Angeloni, N. Glynn, G. Ambrosini, M. J. Garant, J. Dee Higley, S. Suomi, and B. C. Hansen Characterization of the Rhesus Monkey Ghrelin Gene and Factors Influencing Ghrelin Gene Expression and Fasting Plasma Levels Endocrinology, May 1, 2004; 145(5): 2197 - 2205. [Abstract] [Full Text] [PDF] |
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Y. Lin, K. Matsumura, M. Fukuhara, S. Kagiyama, K. Fujii, and M. Iida Ghrelin Acts at the Nucleus of the Solitary Tract to Decrease Arterial Pressure in Rats Hypertension, May 1, 2004; 43(5): 977 - 982. [Abstract] [Full Text] [PDF] |
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A. INUI, A. ASAKAWA, C. Y. BOWERS, G. MANTOVANI, A. LAVIANO, M. M. MEGUID, and M. FUJIMIYA Ghrelin, appetite, and gastric motility: the emerging role of the stomach as an endocrine organ FASEB J, March 1, 2004; 18(3): 439 - 456. [Abstract] [Full Text] [PDF] |
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P. J. Havel Update on Adipocyte Hormones: Regulation of Energy Balance and Carbohydrate/Lipid Metabolism Diabetes, February 1, 2004; 53(90001): S143 - 151. [Abstract] [Full Text] |
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G. Murdolo, P. Lucidi, C. Di Loreto, N. Parlanti, A. De Cicco, C. Fatone, C. G. Fanelli, G. B. Bolli, F. Santeusanio, and P. De Feo Insulin is Required for Prandial Ghrelin Suppression in Humans Diabetes, December 1, 2003; 52(12): 2923 - 2927. [Abstract] [Full Text] [PDF] |
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Y. Sun, S. Ahmed, and R. G. Smith Deletion of Ghrelin Impairs neither Growth nor Appetite Mol. Cell. Biol., November 15, 2003; 23(22): 7973 - 7981. [Abstract] [Full Text] [PDF] |
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B. Beck, S. Richy, and A. Stricker-Krongrad Ghrelin and Body Weight Regulation in the Obese Zucker Rat in Relation to Feeding State and Dark/Light Cycle Experimental Biology and Medicine, November 1, 2003; 228(10): 1124 - 1131. [Abstract] [Full Text] [PDF] |
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Y. Ueta, Y. Ozaki, J. Saito, and T. Onaka Involvement of Novel Feeding-Related Peptides in Neuroendocrine Response to Stress Experimental Biology and Medicine, November 1, 2003; 228(10): 1168 - 1174. [Abstract] [Full Text] [PDF] |
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B. Holst, A. Cygankiewicz, T. H. Jensen, M. Ankersen, and T. W. Schwartz High Constitutive Signaling of the Ghrelin Receptor--Identification of a Potent Inverse Agonist Mol. Endocrinol., November 1, 2003; 17(11): 2201 - 2210. [Abstract] [Full Text] [PDF] |
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J. E. Caminos, R. Nogueiras, M. Blanco, L. M. Seoane, S. Bravo, C. V. Alvarez, T. Garcia-Caballero, F. F. Casanueva, and C. Dieguez Cellular Distribution and Regulation of Ghrelin Messenger Ribonucleic Acid in the Rat Pituitary Gland Endocrinology, November 1, 2003; 144(11): 5089 - 5097. [Abstract] [Full Text] [PDF] |
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A.-S. Parent, G. Teilmann, A. Juul, N. E. Skakkebaek, J. Toppari, and J.-P. Bourguignon The Timing of Normal Puberty and the Age Limits of Sexual Precocity: Variations around the World, Secular Trends, and Changes after Migration Endocr. Rev., October 1, 2003; 24(5): 668 - 693. [Abstract] [Full Text] [PDF] |
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X. Qi, J. Reed, E. W. Englander, V. Chandrashekar, A. Bartke, and G. H. Greeley Jr. Evidence That Growth Hormone Exerts a Feedback Effect on Stomach Ghrelin Production and Secretion Experimental Biology and Medicine, October 1, 2003; 228(9): 1028 - 1032. [Abstract] [Full Text] [PDF] |
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F. Broglio, C. Gottero, A. Benso, F. Prodam, S. Destefanis, C. Gauna, M. Maccario, R. Deghenghi, A. J. van der Lely, and E. Ghigo Effects of Ghrelin on the Insulin and Glycemic Responses to Glucose, Arginine, or Free Fatty Acids Load in Humans J. Clin. Endocrinol. Metab., September 1, 2003; 88(9): 4268 - 4272. [Abstract] [Full Text] [PDF] |
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