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Registro Completo |
Biblioteca(s): |
Embrapa Unidades Centrais. |
Data corrente: |
04/10/2016 |
Data da última atualização: |
29/12/2017 |
Autoria: |
POPPL, A. G.; VALLE, S. C.; GONZÁLEZ, F. H. D.; KUCHARSKI, L. C.; SILVA, R. S. M. da. |
Afiliação: |
ÁLAN G. POPPL, UFRGS; SANDRA C. VALLE, UFRGS; FÉLIX H. D. GONZÁLEZ, UFRGS; LUIZ C. KUCHARSKI, UFRGS; ROSELIS S. M. DA SILVA, UFRGS. |
Título: |
Insulin binding characteristics in canine muscle tissue: effects of the estrous cycle phases. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Pesquisa Veterinária Brasileira, Rio de Janeiro, v. 36, n. 8, p. 761-766, ago. 2016. |
Idioma: |
Inglês |
Conteúdo: |
Hormonal fluctuations during the different estrous cycle are a well-recognized cause of insulin resistance in bitches, and little is known about insulin receptor binding or post-binding defects associated with insulin resistance in dogs. To evaluate insulin binding characteristics in muscle tissue of bitches during the estrous cycle, 17 owned bitches were used in the study (six in anestrus, five in estrus, and six in diestrus). An intravenous glucose tolerance test (IVGTT) was performed in all patients by means of injection of 1mL/kg of a glucose 50% solution (500mg/kg), with blood sample collection for glucose determination at 0, 3, 5, 7, 15, 30, 45 and 60 minutes after glucose infusion. Muscle samples, taken after spaying surgery, were immediately frozen in liquid nitrogen and then stored at -80 ºC until the membranes were prepared by sequential centrifugation after being homogenized. For binding studies, membranes were incubated in the presence of 20,000cpm of human 125I-insulin and in increasing concentrations of unlabeled human regular insulin for cold saturation. The IVGTT showed no differences among bitches during the estrous cycle regarding baseline glycemia or glycemic response after glucose infusion. Two insulin binding sites - high-affinity and low-affinity ones - were detected by Scatchard analysis, and significant statistical differences were observed in the dissociation constant (Kd1) and maximum binding capacity (Bmax1) of the high-affinity binding sites. The Kd1 for the anestrus group (6.54±2.77nM/mg of protein) was smaller (P<0.001) than for the estrus (28.54±6.94nM/mg of protein) and diestrus (15.56±3.88nM/mg of protein) groups. Bmax1 in the estrus (0.83±0.42nM/mg of protein) and diestrus (1.24±0.24nM/mg of protein) groups were also higher (P<0.001) than the values observed in anestrus (0.35±0.06nM/mg of protein). These results indicate modulation of insulin binding characteristics during different phases of the estrous cycle in dogs, showing that muscle insulin binding affinity for its receptor is reduced during estrus and diestrus. However, this poor hormone-receptor affinity is compensated for by a greater total binding capacity, once there is no difference in patients? glycemic response after an intravenous glucose load. MenosHormonal fluctuations during the different estrous cycle are a well-recognized cause of insulin resistance in bitches, and little is known about insulin receptor binding or post-binding defects associated with insulin resistance in dogs. To evaluate insulin binding characteristics in muscle tissue of bitches during the estrous cycle, 17 owned bitches were used in the study (six in anestrus, five in estrus, and six in diestrus). An intravenous glucose tolerance test (IVGTT) was performed in all patients by means of injection of 1mL/kg of a glucose 50% solution (500mg/kg), with blood sample collection for glucose determination at 0, 3, 5, 7, 15, 30, 45 and 60 minutes after glucose infusion. Muscle samples, taken after spaying surgery, were immediately frozen in liquid nitrogen and then stored at -80 ºC until the membranes were prepared by sequential centrifugation after being homogenized. For binding studies, membranes were incubated in the presence of 20,000cpm of human 125I-insulin and in increasing concentrations of unlabeled human regular insulin for cold saturation. The IVGTT showed no differences among bitches during the estrous cycle regarding baseline glycemia or glycemic response after glucose infusion. Two insulin binding sites - high-affinity and low-affinity ones - were detected by Scatchard analysis, and significant statistical differences were observed in the dissociation constant (Kd1) and maximum binding capacity (Bmax1) of the high-affinity binding sites. The ... Mostrar Tudo |
Palavras-Chave: |
Insulin sensitivity; Receptor tirosina quinase; Resistência insulinica; Tyrosine kinase receptors. |
Thesagro: |
Cão; Ciclo estral; Musculo. |
Thesaurus Nal: |
diabetes mellitus; Dogs; Estrous cycle; Insulin resistance; Muscle tissues. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/148294/1/Insulin-binding-characteristics.pdf
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Marc: |
LEADER 03212naa a2200313 a 4500 001 2054054 005 2017-12-29 008 2016 bl uuuu u00u1 u #d 100 1 $aPOPPL, A. G. 245 $aInsulin binding characteristics in canine muscle tissue$beffects of the estrous cycle phases. 260 $c2016 520 $aHormonal fluctuations during the different estrous cycle are a well-recognized cause of insulin resistance in bitches, and little is known about insulin receptor binding or post-binding defects associated with insulin resistance in dogs. To evaluate insulin binding characteristics in muscle tissue of bitches during the estrous cycle, 17 owned bitches were used in the study (six in anestrus, five in estrus, and six in diestrus). An intravenous glucose tolerance test (IVGTT) was performed in all patients by means of injection of 1mL/kg of a glucose 50% solution (500mg/kg), with blood sample collection for glucose determination at 0, 3, 5, 7, 15, 30, 45 and 60 minutes after glucose infusion. Muscle samples, taken after spaying surgery, were immediately frozen in liquid nitrogen and then stored at -80 ºC until the membranes were prepared by sequential centrifugation after being homogenized. For binding studies, membranes were incubated in the presence of 20,000cpm of human 125I-insulin and in increasing concentrations of unlabeled human regular insulin for cold saturation. The IVGTT showed no differences among bitches during the estrous cycle regarding baseline glycemia or glycemic response after glucose infusion. Two insulin binding sites - high-affinity and low-affinity ones - were detected by Scatchard analysis, and significant statistical differences were observed in the dissociation constant (Kd1) and maximum binding capacity (Bmax1) of the high-affinity binding sites. The Kd1 for the anestrus group (6.54±2.77nM/mg of protein) was smaller (P<0.001) than for the estrus (28.54±6.94nM/mg of protein) and diestrus (15.56±3.88nM/mg of protein) groups. Bmax1 in the estrus (0.83±0.42nM/mg of protein) and diestrus (1.24±0.24nM/mg of protein) groups were also higher (P<0.001) than the values observed in anestrus (0.35±0.06nM/mg of protein). These results indicate modulation of insulin binding characteristics during different phases of the estrous cycle in dogs, showing that muscle insulin binding affinity for its receptor is reduced during estrus and diestrus. However, this poor hormone-receptor affinity is compensated for by a greater total binding capacity, once there is no difference in patients? glycemic response after an intravenous glucose load. 650 $adiabetes mellitus 650 $aDogs 650 $aEstrous cycle 650 $aInsulin resistance 650 $aMuscle tissues 650 $aCão 650 $aCiclo estral 650 $aMusculo 653 $aInsulin sensitivity 653 $aReceptor tirosina quinase 653 $aResistência insulinica 653 $aTyrosine kinase receptors 700 1 $aVALLE, S. C. 700 1 $aGONZÁLEZ, F. H. D. 700 1 $aKUCHARSKI, L. C. 700 1 $aSILVA, R. S. M. da 773 $tPesquisa Veterinária Brasileira, Rio de Janeiro$gv. 36, n. 8, p. 761-766, ago. 2016.
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Embrapa Unidades Centrais (AI-SEDE) |
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Registro Completo
Biblioteca(s): |
Embrapa Amazônia Ocidental. |
Data corrente: |
14/09/1999 |
Data da última atualização: |
21/06/2018 |
Autoria: |
AZEVEDO, C. P. de; DÜNISCH, O.; NEVES, E. J. M.; GARCIA, L. C.; LIMA, R. M. B. de. |
Afiliação: |
CELSO PAULO DE AZEVEDO, CPAA; LUCINDA CARNEIRO GARCIA, CPAA; ROBERVAL MONTEIRO BEZERRA DE LIMA, CPAA. |
Título: |
Estudo sobre a formação de madeira de espécies florestais nativas da Amazônia, plantadas a pleno sol. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
Manaus: EMBRAPA-CPAA, 1998. |
Páginas: |
4 p. |
Série: |
(EMBRAPA-CPAA. Pesquisa em Andamento, 42). |
ISSN: |
1414-9079 |
Idioma: |
Português |
Conteúdo: |
Instalacao de ensaios (agro)florestais sobre areas abandonadas e/ou degradadas, com o objetivo de conhecer o comportamento de especies florestais (Carapa guianensis, Cedrela odorata, Ceiba pentandra, Dipteryx odorata, Hymenaea courbaril, Swietenia macrophylla, Tabebuia heptaphylla, Virola surinanmensis) em diferentes sistemas de plantio (plena abertura, faixas de enriquecimento e associacao com cultivos agricolas). Resultados preliminares sobre a dinamica de crescimento do cambio das arvores (tecnica pin-marker) indicaram diferencas significativas entre as especies, com destaque para C. pentandra e H. courbaril. |
Palavras-Chave: |
Agrofloresta; Amazonas; Brasil; Insolation; Tabebuia heptaphylla; Virola surinanmensis. |
Thesagro: |
Andiroba; Carapa Guianensis; Cedrela Odorata; Cedro; Ceiba Pentandra; Cumaru; Dipteryx Odorata; Essência Florestal; Hymenaea Courbaril; Insolação; Ipê; Jatobá; Madeira; Mogno; Paineira; Silvicultura; Swietenia Macrophylla; Ucuuba. |
Thesaurus NAL: |
agroforestry; forest trees; wood. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/114739/1/PA-42.pdf
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Marc: |
LEADER 01951nam a2200517 a 4500 001 1666483 005 2018-06-21 008 1998 bl uuuu u0uu1 u #d 022 $a1414-9079 100 1 $aAZEVEDO, C. P. de 245 $aEstudo sobre a formação de madeira de espécies florestais nativas da Amazônia, plantadas a pleno sol. 260 $aManaus: EMBRAPA-CPAA$c1998 300 $a4 p. 490 $a(EMBRAPA-CPAA. Pesquisa em Andamento, 42). 520 $aInstalacao de ensaios (agro)florestais sobre areas abandonadas e/ou degradadas, com o objetivo de conhecer o comportamento de especies florestais (Carapa guianensis, Cedrela odorata, Ceiba pentandra, Dipteryx odorata, Hymenaea courbaril, Swietenia macrophylla, Tabebuia heptaphylla, Virola surinanmensis) em diferentes sistemas de plantio (plena abertura, faixas de enriquecimento e associacao com cultivos agricolas). Resultados preliminares sobre a dinamica de crescimento do cambio das arvores (tecnica pin-marker) indicaram diferencas significativas entre as especies, com destaque para C. pentandra e H. courbaril. 650 $aagroforestry 650 $aforest trees 650 $awood 650 $aAndiroba 650 $aCarapa Guianensis 650 $aCedrela Odorata 650 $aCedro 650 $aCeiba Pentandra 650 $aCumaru 650 $aDipteryx Odorata 650 $aEssência Florestal 650 $aHymenaea Courbaril 650 $aInsolação 650 $aIpê 650 $aJatobá 650 $aMadeira 650 $aMogno 650 $aPaineira 650 $aSilvicultura 650 $aSwietenia Macrophylla 650 $aUcuuba 653 $aAgrofloresta 653 $aAmazonas 653 $aBrasil 653 $aInsolation 653 $aTabebuia heptaphylla 653 $aVirola surinanmensis 700 1 $aDÜNISCH, O. 700 1 $aNEVES, E. J. M. 700 1 $aGARCIA, L. C. 700 1 $aLIMA, R. M. B. de
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