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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
17/09/2007 |
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Data da última atualização: |
24/02/2010 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FURTADO FILHO, O. V.; POLCHEIRA, C.; MACHADO, D. P.; MOURÃO, G.; HERMES-LIMA, M. |
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Afiliação: |
Orlando V. Furtado Filho, UnB; Cássia Polcheira, UnB; Daniel P. Machado, UnB; Guilherme Mourão, Embrapa Pantanal; Marcelo Hermes Lima, UnB. |
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Título: |
Selected oxidative stress markers in a South American crocodilian species. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Separata de: Comparative Biochemistry and Physiology, Part. C, v.146, p.241-254, 2007. |
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Idioma: |
Inglês |
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Conteúdo: |
Crocodilians and other diving vertebrates experience hypoperfusion and hypoxia of several internal organs during long dives. At the end of a dive, reperfusion of aerated blood may cause a physiologically relevant oxidative stress. In this study, we analyzed selected markers of oxidative stress in eight organs of normoxic Paraguayan caiman (Caiman yacare) captured in the Brazilian Pantanal wetlands during the winter of 2001 (six mature-adult males and eight young-adult males; AD-1 and YA-1 groups, respectively), and during the summer of 2002 (six young-adult males (YA-2 group), ten hatchlings and five embryos). Lipid peroxidation products determined by three different assays were generally highest in brain, liver and kidney (in comparison with all other organs), and lowest in white muscles from the tail and hind legs. Liver and kidney showed the highest levels of carbonyl protein, while brain showed low levels. Intermediate levels of oxidative stress markers were mostly found in the heart ventricles and lung. Differences in oxidative stress markers between AD-1 and YA-1 were organ-specific, showing no age-related correlation. However, most oxidative stress markers in YA-2 organs were either than (by 1.4- to 3.7-fold) or not significantly different from respective values in hatchlings organs. This pattern (hatchlings versus young-adults) was confirmed using correlation analysis of individual caiman size versus levels of oxidative damage markers in four organs. The higher level of oxidative stress markers in young-adults possibly relates to the fast growth rate (and thus, increased oxidative metabolic rate) of C. yacare in the first years of life. Differences in oxidative stress markers between YA-1 and YA-2 were also observed and were ascribed to seasonal changes in free radical metabolism. These results in normoxic C. yacare represent the first step towards understanding the age-related physiological oxidative stress of a diving reptile from a seasonally changing wetland environment. MenosCrocodilians and other diving vertebrates experience hypoperfusion and hypoxia of several internal organs during long dives. At the end of a dive, reperfusion of aerated blood may cause a physiologically relevant oxidative stress. In this study, we analyzed selected markers of oxidative stress in eight organs of normoxic Paraguayan caiman (Caiman yacare) captured in the Brazilian Pantanal wetlands during the winter of 2001 (six mature-adult males and eight young-adult males; AD-1 and YA-1 groups, respectively), and during the summer of 2002 (six young-adult males (YA-2 group), ten hatchlings and five embryos). Lipid peroxidation products determined by three different assays were generally highest in brain, liver and kidney (in comparison with all other organs), and lowest in white muscles from the tail and hind legs. Liver and kidney showed the highest levels of carbonyl protein, while brain showed low levels. Intermediate levels of oxidative stress markers were mostly found in the heart ventricles and lung. Differences in oxidative stress markers between AD-1 and YA-1 were organ-specific, showing no age-related correlation. However, most oxidative stress markers in YA-2 organs were either than (by 1.4- to 3.7-fold) or not significantly different from respective values in hatchlings organs. This pattern (hatchlings versus young-adults) was confirmed using correlation analysis of individual caiman size versus levels of oxidative damage markers in four organs. The higher leve... Mostrar Tudo |
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Palavras-Chave: |
Aging; Carbony protein; Diving; Free radical; TBARS. |
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Thesaurus Nal: |
Caiman; lipid peroxidation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02716naa a2200253 a 4500
001 1812439
005 2010-02-24
008 2007 bl --- 0-- u #d
100 1 $aFURTADO FILHO, O. V.
245 $aSelected oxidative stress markers in a South American crocodilian species.
260 $c2007
520 $aCrocodilians and other diving vertebrates experience hypoperfusion and hypoxia of several internal organs during long dives. At the end of a dive, reperfusion of aerated blood may cause a physiologically relevant oxidative stress. In this study, we analyzed selected markers of oxidative stress in eight organs of normoxic Paraguayan caiman (Caiman yacare) captured in the Brazilian Pantanal wetlands during the winter of 2001 (six mature-adult males and eight young-adult males; AD-1 and YA-1 groups, respectively), and during the summer of 2002 (six young-adult males (YA-2 group), ten hatchlings and five embryos). Lipid peroxidation products determined by three different assays were generally highest in brain, liver and kidney (in comparison with all other organs), and lowest in white muscles from the tail and hind legs. Liver and kidney showed the highest levels of carbonyl protein, while brain showed low levels. Intermediate levels of oxidative stress markers were mostly found in the heart ventricles and lung. Differences in oxidative stress markers between AD-1 and YA-1 were organ-specific, showing no age-related correlation. However, most oxidative stress markers in YA-2 organs were either than (by 1.4- to 3.7-fold) or not significantly different from respective values in hatchlings organs. This pattern (hatchlings versus young-adults) was confirmed using correlation analysis of individual caiman size versus levels of oxidative damage markers in four organs. The higher level of oxidative stress markers in young-adults possibly relates to the fast growth rate (and thus, increased oxidative metabolic rate) of C. yacare in the first years of life. Differences in oxidative stress markers between YA-1 and YA-2 were also observed and were ascribed to seasonal changes in free radical metabolism. These results in normoxic C. yacare represent the first step towards understanding the age-related physiological oxidative stress of a diving reptile from a seasonally changing wetland environment.
650 $aCaiman
650 $alipid peroxidation
653 $aAging
653 $aCarbony protein
653 $aDiving
653 $aFree radical
653 $aTBARS
700 1 $aPOLCHEIRA, C.
700 1 $aMACHADO, D. P.
700 1 $aMOURÃO, G.
700 1 $aHERMES-LIMA, M.
773 $tSeparata de: Comparative Biochemistry and Physiology, Part. C$gv.146, p.241-254, 2007.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 411 | |
| 164. |  | TOMAS, W. M.; CACERES, N. C.; NUNES, A. P.; FISCHER, E.; MOURAO, G.; CAMPOS, Z. Mammals in the Pantanal wetland, Brazil. In: JUNK, W. J.; SILVA, C. J. da.; NUNES DA CUNHA, C.; WANTZEN, K. M. (Ed.) The Pantanal: ecology, biodiversity and sustainable management of a large neotropical seasonal wetland. Sofia: Pensoft Publishers, 2011. p. 565-597.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Pantanal. |
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| 167. | | ARRUDA, W. de S.; ÁVILA, R. W.; FERREIRA, V. L.; MOURÃO, G. de M. Dieta de Physalaemus albonotatus (Steindachner, 1864) (Anura: Leptodactylidae) da Morraria Santa Cruz, Corumbá, MS, Brasil. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA PANTANAL, 1.; SEMANA DE BIOLOGIA, 7., 2007, Corumbá. Resumos...Corumbá: Embrapa Pantanal, 2007. (Embrapa Pantanal. Documentos, 89). 1 p.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
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| 172. | | SILVA, M. P.; MAURO, R. de A.; MOURAO, G. M.; COUTINHO, M. E. Distribuicao e quantificacao de classes de vegetacao do Pantanal atraves de levantamento aereo. Revista Brasileira de Botanica, Sao Paulo, v.23, n.2, p.143-152, jun., 2000.| Biblioteca(s): Embrapa Pantanal. |
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| 173. | | CAMPOS, Z.; MOURAO, G.; MUNIZ, F. de L.; MAFFEI, F.; BOTERO-ARIAS, R.; MAGNUSSON, W. E. Direções para mitigar os impactos da seca extrema nas populações de jacarés (Caiman Yacare) no Pantanal. Oecologia Australis, v. 26, n. 3, p. 403-410, 2022.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Pantanal. |
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| 178. | | SANTOS, F. M.; JANSEN, A. M.; MOURAO, G.; JURBERG, J.; NUNES, A. P.; HERERRA, H. M. Triatominae (Hemiptera, Reduviidae) in the Pantanal region: association with Trypanosoma cruzi, different habitats and vertebrate hosts. Revista da Sociedade Brasileira de Medicina Tropical, v. 48, n. 5, sep/oct, p.532-538, 2015.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Pantanal. |
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| Registros recuperados : 411 | |
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