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Jeffrey Friedman Rockefeller University, Box 305, 1230 York Avenue, New York, New York 10065, USA

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Fidahusein N Denton D Friedman JM 1997 Physiological response to long-term peripheral and central leptin infusion in lean and obese mice . PNAS 94 8878 – 8883 . ( doi:10.1073/pnas.94.16.8878 ) Hervey GR 1969 Regulation of energy balance

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Noelia Martínez-Sánchez Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela, Spain
CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela, Spain

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José M Moreno-Navarrete CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela, Spain
Department of Diabetes, Endocrinology and Nutrition, Hospital de Girona ‘Dr Josep Trueta’, Institut D’investigació Biomèdica de Girona (IdIBGi) and University of Girona, Girona, Spain

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Cristina Contreras Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela, Spain
CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela, Spain

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Eva Rial-Pensado Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela, Spain
CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela, Spain

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Johan Fernø Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela, Spain
Department of Clinical Science, KG Jebsen Center for Diabetes Research, University of Bergen, Bergen, Norway

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Rubén Nogueiras Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela, Spain
CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela, Spain

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Carlos Diéguez Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela, Spain
CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela, Spain

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José-Manuel Fernández-Real CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela, Spain
Department of Diabetes, Endocrinology and Nutrition, Hospital de Girona ‘Dr Josep Trueta’, Institut D’investigació Biomèdica de Girona (IdIBGi) and University of Girona, Girona, Spain

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Miguel López Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela, Spain
CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela, Spain

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Introduction Thyroid hormones (THs; 3,3′,5,5′ tetraiodothyroxyne or T 4 and 3,3′,5-triiodothyronine or T 3 ) exert important biological actions, not only modulating the development and growth but also regulating metabolism and energy balance

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Jacob C Garza Department of Pharmacology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, Texas 78229, USA

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Chung Sub Kim Department of Pharmacology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, Texas 78229, USA

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Jing Liu Department of Pharmacology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, Texas 78229, USA

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Wei Zhang Department of Pharmacology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, Texas 78229, USA

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Xin-Yun Lu Department of Pharmacology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, Texas 78229, USA

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Introduction Melanocortin-4 receptor (MC4R) in the central nervous system (CNS) plays a critical role in the control of energy balance. Activation of MC4R by α-MSH, a derivative of pro-opiomelanocortin (POMC), decreases food intake and increases

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Jaroslav Kuneš Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic

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Veronika Pražienková Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic

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Andrea Popelová Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic

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Barbora Mikulášková Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic

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Jana Zemenová Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
University of Chemistry and Technology, Prague, Czech Republic

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Lenka Maletínská Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic

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al . 2000 ). The suggestion that PrRP may act as a homeostatic regulator of food intake was supported by the fact that PrRP mRNA is reduced in states of negative energy balance similarly to other anorexigenic peptides such as melanocyte

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Alia H Sukkar Section for Nutrition Research, Department of Medicine, Imperial College London, London, UK

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Aaron M Lett Section for Nutrition Research, Department of Medicine, Imperial College London, London, UK

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Gary Frost Section for Nutrition Research, Department of Medicine, Imperial College London, London, UK

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Edward S Chambers Section for Nutrition Research, Department of Medicine, Imperial College London, London, UK

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estimated that obesity can develop from a minor habitual positive energy balance (~50 kcal/day) ( Hill et al. 2003 ). Theoretically, interventions to prevent this small positive energy balance, and thus incremental weight gain, need only promote a

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Monisha Rajasekaran Department of Biological Sciences, University of Ulsan, Ulsan, Korea

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Ok-Joo Sul Department of Biological Sciences, University of Ulsan, Ulsan, Korea

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Eun-Kyung Choi Department of Biological Sciences, University of Ulsan, Ulsan, Korea

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Ji-Eun Kim Department of Biological Sciences, University of Ulsan, Ulsan, Korea

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Jae-Hee Suh Department of Pathology, Ulsan University Hospital, Ulsan, Korea

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Hye-Seon Choi Department of Biological Sciences, University of Ulsan, Ulsan, Korea

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conditions. (B) Fat mass in WT ( n  = 10) and Ccl2 KO ( n  = 9) mice at 21 weeks. (C) Energy balance between WT ( n  = 8) and Ccl2 KO ( n  = 7) female mice. Mice at 22 weeks were examined in a metabolic cage over a 2-day period to measure energy

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PJ Morgan
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AW Ross
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JG Mercer
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P Barrett
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The photoperiodic mammal undergoes quite remarkable changes in physiology as part of its natural adaptations to seasonal fluctuations in the environment. Changes in energy balance and body weight are among these adaptations. In some seasonal mammals, such as the Siberian hamster (Phodopus sungorus), these changes in body weight have been explored in detail, and there is evidence for tightly controlled systems of energy balance that are coordinated by photoperiod acting via the temporal pattern of melatonin secretion from the pineal gland. The pathways and systems involved appear to be quite distinct from the hypothalamic pathways identified to regulate energy balance in studies of both mice and rats thus far. Instead it appears that in the Siberian hamster a tightly regulated system under the control of photoperiod is able to reset the tone of the systems involved in energy balance regulation. Understanding how photoperiod and melatonin act within the hypothalamus to regulate energy balance offers potentially fundamental and important new insights into the control of energy balance. This review describes the current state of our knowledge.

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C García-Luna Department of Neurosciences Research, Molecular Neurophysiology Laboratory, National Institute of Psychiatry Ramón de la Fuente Muñiz, Mexico City, Mexico

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P Soberanes-Chávez Department of Neurosciences Research, Molecular Neurophysiology Laboratory, National Institute of Psychiatry Ramón de la Fuente Muñiz, Mexico City, Mexico

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P de Gortari Department of Neurosciences Research, Molecular Neurophysiology Laboratory, National Institute of Psychiatry Ramón de la Fuente Muñiz, Mexico City, Mexico

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lipid and glucose metabolism improves in comparison with HFD-fed animals during the resting phase ( Hatori et al. 2012 , Tsai et al. 2013 ), showing that feeding time is relevant to maintain an adequate energy balance. Expression and/or release of

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Marcela Oliveira Departamento de Biofísica, Departmento de Microbiologia, Departamento de Fisiologia, Department of Oral Biological and Medical Sciences, Centro de Ciências Naturais e Humanas, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Pedro de Toledo 669, São Paulo, São Paulo 04039-032, Brazil

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Diego M Assis Departamento de Biofísica, Departmento de Microbiologia, Departamento de Fisiologia, Department of Oral Biological and Medical Sciences, Centro de Ciências Naturais e Humanas, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Pedro de Toledo 669, São Paulo, São Paulo 04039-032, Brazil

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Thaysa Paschoalin Departamento de Biofísica, Departmento de Microbiologia, Departamento de Fisiologia, Department of Oral Biological and Medical Sciences, Centro de Ciências Naturais e Humanas, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Pedro de Toledo 669, São Paulo, São Paulo 04039-032, Brazil

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Antonio Miranda Departamento de Biofísica, Departmento de Microbiologia, Departamento de Fisiologia, Department of Oral Biological and Medical Sciences, Centro de Ciências Naturais e Humanas, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Pedro de Toledo 669, São Paulo, São Paulo 04039-032, Brazil

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Eliane B Ribeiro Departamento de Biofísica, Departmento de Microbiologia, Departamento de Fisiologia, Department of Oral Biological and Medical Sciences, Centro de Ciências Naturais e Humanas, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Pedro de Toledo 669, São Paulo, São Paulo 04039-032, Brazil

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Maria A Juliano Departamento de Biofísica, Departmento de Microbiologia, Departamento de Fisiologia, Department of Oral Biological and Medical Sciences, Centro de Ciências Naturais e Humanas, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Pedro de Toledo 669, São Paulo, São Paulo 04039-032, Brazil

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Dieter Brömme Departamento de Biofísica, Departmento de Microbiologia, Departamento de Fisiologia, Department of Oral Biological and Medical Sciences, Centro de Ciências Naturais e Humanas, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Pedro de Toledo 669, São Paulo, São Paulo 04039-032, Brazil

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Marcelo Augusto Christoffolete Departamento de Biofísica, Departmento de Microbiologia, Departamento de Fisiologia, Department of Oral Biological and Medical Sciences, Centro de Ciências Naturais e Humanas, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Pedro de Toledo 669, São Paulo, São Paulo 04039-032, Brazil

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Nilana M T Barros Departamento de Biofísica, Departmento de Microbiologia, Departamento de Fisiologia, Department of Oral Biological and Medical Sciences, Centro de Ciências Naturais e Humanas, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Pedro de Toledo 669, São Paulo, São Paulo 04039-032, Brazil
Departamento de Biofísica, Departmento de Microbiologia, Departamento de Fisiologia, Department of Oral Biological and Medical Sciences, Centro de Ciências Naturais e Humanas, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Pedro de Toledo 669, São Paulo, São Paulo 04039-032, Brazil

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Adriana K Carmona Departamento de Biofísica, Departmento de Microbiologia, Departamento de Fisiologia, Department of Oral Biological and Medical Sciences, Centro de Ciências Naturais e Humanas, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Pedro de Toledo 669, São Paulo, São Paulo 04039-032, Brazil

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efficiency of this enzyme in inactivating the functional activity of leptin. Enzymatic activities of cathepsins have not been characterized in obesity. However, the cathepsin S gene expression is described to be more influenced by changes in energy balance

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Eric D Bruder Endocrine Research Laboratory, St Luke’s Medical Center, Milwaukee, Wisconsin 53215, USA
Center for Neuropharmacology and Neurosciences, Albany Medical College, Albany, New York 12208, USA
Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA

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Lauren Jacobson Endocrine Research Laboratory, St Luke’s Medical Center, Milwaukee, Wisconsin 53215, USA
Center for Neuropharmacology and Neurosciences, Albany Medical College, Albany, New York 12208, USA
Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA

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Hershel Raff Endocrine Research Laboratory, St Luke’s Medical Center, Milwaukee, Wisconsin 53215, USA
Center for Neuropharmacology and Neurosciences, Albany Medical College, Albany, New York 12208, USA
Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA

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hormones have complex interactions ultimately controlling food intake, growth, development, and energy balance in the neonate and adult ( Meier & Gressner 2004 ). Of particular interest is the role that these hormones play in the neonatal adaptation to

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