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Intracerebroventricular injection of murine leptin enhances the postprandial metabolic rate in the rat
Energy balance is achieved by means of a concomitant control of both food intake and energy expenditure. Leptin, synthesized in the adipose tissue, acts on brain structures and lowers body weight by inhibiting food intake and in parallel by enhancing energy expenditure i.e. metabolism or one of its...
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| Published in: | Brain research 2000-08, Vol.874 (1), p.30-36 |
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| cites | cdi_FETCH-LOGICAL-c421t-950bdba8af31028222d0a26e43f74c805d36869459e787859c3680cec6d4c9cf3 |
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| container_title | Brain research |
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| creator | Ruffin, Marie-Pierre Nicolaidis, Stylianos |
| description | Energy balance is achieved by means of a concomitant control of both food intake and energy expenditure. Leptin, synthesized in the adipose tissue, acts on brain structures and lowers body weight by inhibiting food intake and in parallel by enhancing energy expenditure i.e. metabolism or one of its components. Recording distinctly these components allowed us to assess the effect of an acute intracerebroventricular injection of leptin on both feeding pattern and background metabolism (i.e. energy expenditure free from the part of locomotor activity), respiratory quotient, feeding-related metabolism and locomotor activity-related metabolism. Leptin injection to Sprague–Dawley male rats induced an inhibition of feeding that began 90 min after the treatment and lasted 1 h before to return to the control feeding pattern level. Considering this late behavioral effect, it appeared that leptin may act during the postprandial period so that we recorded the different metabolic parameters following a 3 g calibrated meal itself preceded by leptin vs. artificial cerebrospinal fluid injection. Postprandial respiratory quotient was rapidly lowered in leptin-treated animals and subsequent background metabolism increased for 6 h. Thus it appeared that leptin increased the duration of the postprandial metabolic rate via the recruitment of endogenous fat stores. Enhancement in the thermic effect of food may be the reason for feeding behavior inhibition to be delayed. |
| doi_str_mv | 10.1016/S0006-8993(00)02570-1 |
| format | article |
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Leptin, synthesized in the adipose tissue, acts on brain structures and lowers body weight by inhibiting food intake and in parallel by enhancing energy expenditure i.e. metabolism or one of its components. Recording distinctly these components allowed us to assess the effect of an acute intracerebroventricular injection of leptin on both feeding pattern and background metabolism (i.e. energy expenditure free from the part of locomotor activity), respiratory quotient, feeding-related metabolism and locomotor activity-related metabolism. Leptin injection to Sprague–Dawley male rats induced an inhibition of feeding that began 90 min after the treatment and lasted 1 h before to return to the control feeding pattern level. Considering this late behavioral effect, it appeared that leptin may act during the postprandial period so that we recorded the different metabolic parameters following a 3 g calibrated meal itself preceded by leptin vs. artificial cerebrospinal fluid injection. Postprandial respiratory quotient was rapidly lowered in leptin-treated animals and subsequent background metabolism increased for 6 h. Thus it appeared that leptin increased the duration of the postprandial metabolic rate via the recruitment of endogenous fat stores. Enhancement in the thermic effect of food may be the reason for feeding behavior inhibition to be delayed.</description><identifier>ISSN: 0006-8993</identifier><identifier>EISSN: 1872-6240</identifier><identifier>DOI: 10.1016/S0006-8993(00)02570-1</identifier><identifier>PMID: 10936221</identifier><identifier>CODEN: BRREAP</identifier><language>eng</language><publisher>London: Elsevier B.V</publisher><subject>Animals ; Background metabolism ; Behavior, Animal - drug effects ; Biological and medical sciences ; Body weight ; Body Weight - drug effects ; Eating - drug effects ; Feeding ; Feeding. Feeding behavior ; Fundamental and applied biological sciences. 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Leptin, synthesized in the adipose tissue, acts on brain structures and lowers body weight by inhibiting food intake and in parallel by enhancing energy expenditure i.e. metabolism or one of its components. Recording distinctly these components allowed us to assess the effect of an acute intracerebroventricular injection of leptin on both feeding pattern and background metabolism (i.e. energy expenditure free from the part of locomotor activity), respiratory quotient, feeding-related metabolism and locomotor activity-related metabolism. Leptin injection to Sprague–Dawley male rats induced an inhibition of feeding that began 90 min after the treatment and lasted 1 h before to return to the control feeding pattern level. Considering this late behavioral effect, it appeared that leptin may act during the postprandial period so that we recorded the different metabolic parameters following a 3 g calibrated meal itself preceded by leptin vs. artificial cerebrospinal fluid injection. Postprandial respiratory quotient was rapidly lowered in leptin-treated animals and subsequent background metabolism increased for 6 h. Thus it appeared that leptin increased the duration of the postprandial metabolic rate via the recruitment of endogenous fat stores. Enhancement in the thermic effect of food may be the reason for feeding behavior inhibition to be delayed.</description><subject>Animals</subject><subject>Background metabolism</subject><subject>Behavior, Animal - drug effects</subject><subject>Biological and medical sciences</subject><subject>Body weight</subject><subject>Body Weight - drug effects</subject><subject>Eating - drug effects</subject><subject>Feeding</subject><subject>Feeding. Feeding behavior</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Injections, Intraventricular</subject><subject>Leptin - pharmacology</subject><subject>Lipolysis</subject><subject>Male</subject><subject>Metabolism - drug effects</subject><subject>Mice</subject><subject>Motor Activity - drug effects</subject><subject>Obesity</subject><subject>Postprandial Period</subject><subject>Rats</subject><subject>Rats, Sprague-Dawley</subject><subject>Respiration - drug effects</subject><subject>Respiratory quotient</subject><subject>Vertebrates: anatomy and physiology, studies on body, several organs or systems</subject><issn>0006-8993</issn><issn>1872-6240</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNqFkUtrFjEUhoMo9mv1JyhZiOhi9OQyycyqSLFaKLhQ1yGTOUNTZpIxyRT89-a7oO66OueF51x4X0JeMfjAgKmP3wFANV3fi3cA74G3Ghr2hOxYp3mjuISnZPcXOSPnOd9XKUQPz8kZg14oztmOTDehJOsw4ZDiA1bh3TbbRH24R1d8DDROdNmSD0hnXIsPFMOdDQ4zLXdI15jLmmwYvZ3pgsUOcfaOJluw7jggtX9Bnk12zvjyVC_Iz-vPP66-NrffvtxcfbptnOSsNH0LwzjYzk6CAe845yNYrlCKSUvXQTsK1aletj3qTndt76oGh06N0vVuEhfk7XHvmuKvDXMxi88O59kGjFs2mmkhWqkfBZlumQTJK9geQZdizgknsya_2PTbMDD7JMwhCbO32QCYQxKG1bnXpwPbsOD439TR-gq8OQE2OztP1UPn8z9OaqVgf__yiGG17cFjMtl5rPaPPtWAzBj9I5_8Ae7PpbA</recordid><startdate>20000818</startdate><enddate>20000818</enddate><creator>Ruffin, Marie-Pierre</creator><creator>Nicolaidis, Stylianos</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TK</scope><scope>7X8</scope></search><sort><creationdate>20000818</creationdate><title>Intracerebroventricular injection of murine leptin enhances the postprandial metabolic rate in the rat</title><author>Ruffin, Marie-Pierre ; Nicolaidis, Stylianos</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c421t-950bdba8af31028222d0a26e43f74c805d36869459e787859c3680cec6d4c9cf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>Animals</topic><topic>Background metabolism</topic><topic>Behavior, Animal - drug effects</topic><topic>Biological and medical sciences</topic><topic>Body weight</topic><topic>Body Weight - drug effects</topic><topic>Eating - drug effects</topic><topic>Feeding</topic><topic>Feeding. 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| subjects | Animals Background metabolism Behavior, Animal - drug effects Biological and medical sciences Body weight Body Weight - drug effects Eating - drug effects Feeding Feeding. Feeding behavior Fundamental and applied biological sciences. Psychology Injections, Intraventricular Leptin - pharmacology Lipolysis Male Metabolism - drug effects Mice Motor Activity - drug effects Obesity Postprandial Period Rats Rats, Sprague-Dawley Respiration - drug effects Respiratory quotient Vertebrates: anatomy and physiology, studies on body, several organs or systems |
| title | Intracerebroventricular injection of murine leptin enhances the postprandial metabolic rate in the rat |
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