Serum leptin and insulin levels in lactating protein-restricted rats: implications for energy balance
The present study analysed the effect of protein restriction on serum insulin and leptin levels and their relationship with energy balance during lactation. Four groups of rats received isocaloric diets containing 170 g protein/kg or 60 g protein/kg from pregnancy until the 14th day of lactation: co...
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| Veröffentlicht in: | British journal of nutrition 2007-01, Vol.97 (1), p.27-34 |
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| creator | Ferreira, C. L. P. Macêdo, G. M. Latorraca, M. Q. Arantes, V. C. Veloso, R. V. Carneiro, E. M. Boschero, A. C. Nascimento, C. M. O. Gaíva, M. H. |
| description | The present study analysed the effect of protein restriction on serum insulin and leptin levels and their relationship with energy balance during lactation. Four groups of rats received isocaloric diets containing 170 g protein/kg or 60 g protein/kg from pregnancy until the 14th day of lactation: control non-lactating, control lactating (both fed a control diet), low-protein non-lactating and low-protein lactating. Energy intake, body composition, energy balance, serum insulin and leptin concentrations and the relationship between these hormones and several factors related to obesity were analysed. Low-protein-intake lactating rats exhibited hypoinsulinaemia, hyperleptinaemia, hypophagia and decreased energy expenditure compared with control lactating rats. The protein level in the carcasses was lower in the low-protein lactating group than in the control lactating group, resulting in a higher fat content in the first group compared with the latter. Body fat correlated inversely with serum insulin and positively with serum leptin level. There was a significant negative correlation between serum leptin and energy intake, and a positive relationship between energy intake and serum insulin level in lactating rats and in the combined data from both groups. Energy expenditure was correlated positively with serum insulin and negatively with serum leptin in lactating rats and when data from control non-lactating and lactating rats were pooled. Lactating rats submitted to protein restriction, compared with lactating control rats, showed that maternal reserves were preserved owing to less severe negative energy balance. This metabolic adaptation was obtained, at least in part, by the hypoinsulinaemia that resulted in increased insulin sensitivity favouring enhanced fat deposition, hyperleptinaemia and hypophagia. |
| doi_str_mv | 10.1017/S0007114507106863 |
| format | Article |
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L. P. ; Macêdo, G. M. ; Latorraca, M. Q. ; Arantes, V. C. ; Veloso, R. V. ; Carneiro, E. M. ; Boschero, A. C. ; Nascimento, C. M. O. ; Gaíva, M. H.</creator><creatorcontrib>Ferreira, C. L. P. ; Macêdo, G. M. ; Latorraca, M. Q. ; Arantes, V. C. ; Veloso, R. V. ; Carneiro, E. M. ; Boschero, A. C. ; Nascimento, C. M. O. ; Gaíva, M. H.</creatorcontrib><description>The present study analysed the effect of protein restriction on serum insulin and leptin levels and their relationship with energy balance during lactation. Four groups of rats received isocaloric diets containing 170 g protein/kg or 60 g protein/kg from pregnancy until the 14th day of lactation: control non-lactating, control lactating (both fed a control diet), low-protein non-lactating and low-protein lactating. Energy intake, body composition, energy balance, serum insulin and leptin concentrations and the relationship between these hormones and several factors related to obesity were analysed. Low-protein-intake lactating rats exhibited hypoinsulinaemia, hyperleptinaemia, hypophagia and decreased energy expenditure compared with control lactating rats. The protein level in the carcasses was lower in the low-protein lactating group than in the control lactating group, resulting in a higher fat content in the first group compared with the latter. Body fat correlated inversely with serum insulin and positively with serum leptin level. There was a significant negative correlation between serum leptin and energy intake, and a positive relationship between energy intake and serum insulin level in lactating rats and in the combined data from both groups. Energy expenditure was correlated positively with serum insulin and negatively with serum leptin in lactating rats and when data from control non-lactating and lactating rats were pooled. Lactating rats submitted to protein restriction, compared with lactating control rats, showed that maternal reserves were preserved owing to less severe negative energy balance. This metabolic adaptation was obtained, at least in part, by the hypoinsulinaemia that resulted in increased insulin sensitivity favouring enhanced fat deposition, hyperleptinaemia and hypophagia.</description><identifier>ISSN: 0007-1145</identifier><identifier>EISSN: 1475-2662</identifier><identifier>DOI: 10.1017/S0007114507106863</identifier><identifier>PMID: 17217557</identifier><identifier>CODEN: BJNUAV</identifier><language>eng</language><publisher>Cambridge, UK: Cambridge University Press</publisher><subject>Animal Nutritional Physiological Phenomena ; Animals ; Biological and medical sciences ; Body Composition ; Body fat ; Body Weight ; Correlation ; Diet ; Diet, Protein-Restricted ; Energy ; Energy balance ; Energy expenditure ; Energy Intake ; Energy Metabolism ; Feeding. Feeding behavior ; Female ; Food ; Fundamental and applied biological sciences. Psychology ; Hormones ; Hypophagia ; Insulin ; Insulin - blood ; Insulin resistance ; Lactation ; Lactation - blood ; Lactation - physiology ; Leptin ; Leptin - blood ; Low protein diet ; Metabolism ; Nutrient deficiency ; Nutritional status ; Obesity ; Obesity - metabolism ; Physiology ; Pregnancy ; Proteins ; Rats ; Rats, Wistar ; Sensitivity enhancement ; Serum insulin ; Serum leptin ; Thermogenesis ; Vertebrates: anatomy and physiology, studies on body, several organs or systems</subject><ispartof>British journal of nutrition, 2007-01, Vol.97 (1), p.27-34</ispartof><rights>Copyright © The Authors 2007</rights><rights>2007 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c482t-240d3e0e0acb7dde897f612db6a87fd3474dfba3f8b931fada2b3bb7fc041ac33</citedby><cites>FETCH-LOGICAL-c482t-240d3e0e0acb7dde897f612db6a87fd3474dfba3f8b931fada2b3bb7fc041ac33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.cambridge.org/core/product/identifier/S0007114507106863/type/journal_article$$EHTML$$P50$$Gcambridge$$H</linktohtml><link.rule.ids>164,314,776,780,4010,27900,27901,27902,55603</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=18461424$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17217557$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Ferreira, C. L. P.</creatorcontrib><creatorcontrib>Macêdo, G. M.</creatorcontrib><creatorcontrib>Latorraca, M. Q.</creatorcontrib><creatorcontrib>Arantes, V. C.</creatorcontrib><creatorcontrib>Veloso, R. V.</creatorcontrib><creatorcontrib>Carneiro, E. M.</creatorcontrib><creatorcontrib>Boschero, A. C.</creatorcontrib><creatorcontrib>Nascimento, C. M. O.</creatorcontrib><creatorcontrib>Gaíva, M. H.</creatorcontrib><title>Serum leptin and insulin levels in lactating protein-restricted rats: implications for energy balance</title><title>British journal of nutrition</title><addtitle>Br J Nutr</addtitle><description>The present study analysed the effect of protein restriction on serum insulin and leptin levels and their relationship with energy balance during lactation. Four groups of rats received isocaloric diets containing 170 g protein/kg or 60 g protein/kg from pregnancy until the 14th day of lactation: control non-lactating, control lactating (both fed a control diet), low-protein non-lactating and low-protein lactating. Energy intake, body composition, energy balance, serum insulin and leptin concentrations and the relationship between these hormones and several factors related to obesity were analysed. Low-protein-intake lactating rats exhibited hypoinsulinaemia, hyperleptinaemia, hypophagia and decreased energy expenditure compared with control lactating rats. The protein level in the carcasses was lower in the low-protein lactating group than in the control lactating group, resulting in a higher fat content in the first group compared with the latter. Body fat correlated inversely with serum insulin and positively with serum leptin level. There was a significant negative correlation between serum leptin and energy intake, and a positive relationship between energy intake and serum insulin level in lactating rats and in the combined data from both groups. Energy expenditure was correlated positively with serum insulin and negatively with serum leptin in lactating rats and when data from control non-lactating and lactating rats were pooled. Lactating rats submitted to protein restriction, compared with lactating control rats, showed that maternal reserves were preserved owing to less severe negative energy balance. This metabolic adaptation was obtained, at least in part, by the hypoinsulinaemia that resulted in increased insulin sensitivity favouring enhanced fat deposition, hyperleptinaemia and hypophagia.</description><subject>Animal Nutritional Physiological Phenomena</subject><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>Body Composition</subject><subject>Body fat</subject><subject>Body Weight</subject><subject>Correlation</subject><subject>Diet</subject><subject>Diet, Protein-Restricted</subject><subject>Energy</subject><subject>Energy balance</subject><subject>Energy expenditure</subject><subject>Energy Intake</subject><subject>Energy Metabolism</subject><subject>Feeding. Feeding behavior</subject><subject>Female</subject><subject>Food</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Hormones</subject><subject>Hypophagia</subject><subject>Insulin</subject><subject>Insulin - blood</subject><subject>Insulin resistance</subject><subject>Lactation</subject><subject>Lactation - blood</subject><subject>Lactation - physiology</subject><subject>Leptin</subject><subject>Leptin - blood</subject><subject>Low protein diet</subject><subject>Metabolism</subject><subject>Nutrient deficiency</subject><subject>Nutritional status</subject><subject>Obesity</subject><subject>Obesity - metabolism</subject><subject>Physiology</subject><subject>Pregnancy</subject><subject>Proteins</subject><subject>Rats</subject><subject>Rats, Wistar</subject><subject>Sensitivity enhancement</subject><subject>Serum insulin</subject><subject>Serum leptin</subject><subject>Thermogenesis</subject><subject>Vertebrates: anatomy and physiology, studies on body, several organs or systems</subject><issn>0007-1145</issn><issn>1475-2662</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>8G5</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp1kV1vFSEQhonR2NPqD_DGkBh7txYWFjjeNVWrbY1pqsZ4Q_gYTqj7cYTdxv572ZyNJ9F4AQx5nxleZhB6RskrSqg8uSGESEp5U3YilGAP0Ipy2VS1EPVDtJrlatYP0GHOt-WqKFk_RgdU1lQ2jVwhuIE0dbiF7Rh7bHqPY5-ntsQt3EGb8RwZN5oib_A2DSPEvkqQxxTdCB4nM-bXOHbbNroCDX3GYUgYekibe2xNa3oHT9CjYNoMT5fzCH159_bz2fvq6tP5h7PTq8pxVY9VzYlnQIAYZ6X3oNYyCFp7K4ySwTMuuQ_WsKDsmtFgvKkts1YGRzg1jrEjdLyrW4z-nIpJ3cXsoC0mYJiyFopTSfkMvvgLvB2m1BdvulasUUSWVSi6o1wack4Q9DbFzqR7TYmeJ6D_mUDJeb5UnmwHfp-xtLwALxfAZGfakEqDYt5zigvKa164asfFPMKvP7pJP7SQTDZanF_rbxdfL6-_f3yj54fZYtZ0NkW_gf2f_m_3N3HXrc8</recordid><startdate>200701</startdate><enddate>200701</enddate><creator>Ferreira, C. 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L. P. ; Macêdo, G. M. ; Latorraca, M. Q. ; Arantes, V. C. ; Veloso, R. V. ; Carneiro, E. M. ; Boschero, A. C. ; Nascimento, C. M. O. ; Gaíva, M. H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c482t-240d3e0e0acb7dde897f612db6a87fd3474dfba3f8b931fada2b3bb7fc041ac33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Animal Nutritional Physiological Phenomena</topic><topic>Animals</topic><topic>Biological and medical sciences</topic><topic>Body Composition</topic><topic>Body fat</topic><topic>Body Weight</topic><topic>Correlation</topic><topic>Diet</topic><topic>Diet, Protein-Restricted</topic><topic>Energy</topic><topic>Energy balance</topic><topic>Energy expenditure</topic><topic>Energy Intake</topic><topic>Energy Metabolism</topic><topic>Feeding. Feeding behavior</topic><topic>Female</topic><topic>Food</topic><topic>Fundamental and applied biological sciences. 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L. P.</au><au>Macêdo, G. M.</au><au>Latorraca, M. Q.</au><au>Arantes, V. C.</au><au>Veloso, R. V.</au><au>Carneiro, E. M.</au><au>Boschero, A. C.</au><au>Nascimento, C. M. O.</au><au>Gaíva, M. H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Serum leptin and insulin levels in lactating protein-restricted rats: implications for energy balance</atitle><jtitle>British journal of nutrition</jtitle><addtitle>Br J Nutr</addtitle><date>2007-01</date><risdate>2007</risdate><volume>97</volume><issue>1</issue><spage>27</spage><epage>34</epage><pages>27-34</pages><issn>0007-1145</issn><eissn>1475-2662</eissn><coden>BJNUAV</coden><abstract>The present study analysed the effect of protein restriction on serum insulin and leptin levels and their relationship with energy balance during lactation. Four groups of rats received isocaloric diets containing 170 g protein/kg or 60 g protein/kg from pregnancy until the 14th day of lactation: control non-lactating, control lactating (both fed a control diet), low-protein non-lactating and low-protein lactating. Energy intake, body composition, energy balance, serum insulin and leptin concentrations and the relationship between these hormones and several factors related to obesity were analysed. Low-protein-intake lactating rats exhibited hypoinsulinaemia, hyperleptinaemia, hypophagia and decreased energy expenditure compared with control lactating rats. The protein level in the carcasses was lower in the low-protein lactating group than in the control lactating group, resulting in a higher fat content in the first group compared with the latter. Body fat correlated inversely with serum insulin and positively with serum leptin level. There was a significant negative correlation between serum leptin and energy intake, and a positive relationship between energy intake and serum insulin level in lactating rats and in the combined data from both groups. Energy expenditure was correlated positively with serum insulin and negatively with serum leptin in lactating rats and when data from control non-lactating and lactating rats were pooled. Lactating rats submitted to protein restriction, compared with lactating control rats, showed that maternal reserves were preserved owing to less severe negative energy balance. This metabolic adaptation was obtained, at least in part, by the hypoinsulinaemia that resulted in increased insulin sensitivity favouring enhanced fat deposition, hyperleptinaemia and hypophagia.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><pmid>17217557</pmid><doi>10.1017/S0007114507106863</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Animal Nutritional Physiological Phenomena Animals Biological and medical sciences Body Composition Body fat Body Weight Correlation Diet Diet, Protein-Restricted Energy Energy balance Energy expenditure Energy Intake Energy Metabolism Feeding. Feeding behavior Female Food Fundamental and applied biological sciences. Psychology Hormones Hypophagia Insulin Insulin - blood Insulin resistance Lactation Lactation - blood Lactation - physiology Leptin Leptin - blood Low protein diet Metabolism Nutrient deficiency Nutritional status Obesity Obesity - metabolism Physiology Pregnancy Proteins Rats Rats, Wistar Sensitivity enhancement Serum insulin Serum leptin Thermogenesis Vertebrates: anatomy and physiology, studies on body, several organs or systems |
| title | Serum leptin and insulin levels in lactating protein-restricted rats: implications for energy balance |
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