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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
22/02/2010 |
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Data da última atualização: |
11/08/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SIQUEIRA, L. G. B.; TORRES, C. A. A.; AMORIM, L. S.; SOUZA, E. D.; CAMARGO, L. S. de A.; FERNANDES, C. A. C.; VIANA, J. H. M. |
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Afiliação: |
LUIZ GUSTAVO B. SIQUEIRA, UFV; CIRO A. A. TORRES, UFV; LINCOLN S. AMORIM, UFV; ELIZA D. SOUZA; LUIZ SERGIO DE ALMEIDA CAMARGO, CNPGL; CARLOS A. C. FERNANDES, Universidade de Alfenas; JOAO HENRIQUE MOREIRA VIANA, CNPGL. |
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Título: |
Interrelationships among morphology, echotexture, and function of the bovine corpus luteum during the estrous cycle. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Animal Reproduction Science, v. 115, n. 1/4, p. 18-28, 2009. |
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DOI: |
https://doi.org/10.1016/j.anireprosci.2008.11.009 |
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Idioma: |
Inglês |
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Conteúdo: |
It has been suggested that ultrasound image attributes are a potential indicator of physiological and functional status of the corpus luteum (CL) in several species, including cattle. The aims of this study were to evaluate CL morphological, functional and echotextural characteristics, and also to investigate the hypothesis that those attributes are correlated and change similarly throughout an estrous cycle. Ovaries of crossbred (Bos taurus taurus x Bos taurus indicus) heifers were evaluated using ultrasonography daily throughout an interestrus interval using a B-mode, real-time ultrasound machine equipped with a 5 MHz linear-array rectal transducer, during a natural estrous cycle (Experiment 1; n=12) or during a shortened cycle, with luteolysis induction 10d after estrus (Experiment 2; n=6). Blood samples were collected for assay of plasma progesterone concentrations. Corpora lutea areas were measured and daily images of each CL were videotaped and digitized for computer-assisted analysis using custom-developed software. In Experiment 1, area of luteal tissue increased until a maximum value 10d after estrus (P<0.001), followed by a plateau phase, and then a decline beginning 14 d after estrus. Luteal tissue area was highly correlated to plasma progesterone concentrations (r=0.86; P<0.001). When luteolysis was induced in Experiment 2, loss of CL function (decrease in plasma progesterone concentrations to metestrous values) preceded tissue regression by 48 h (24h compared with 72 h; P<0.001). The mean pixel value of ultrasound images did not change in Experiment 1 (P>0.70), but a day effect on this attribute was observed in Experiment 2 (P=0.052). In contrast, mean pixel value was correlated to plasma progesterone concentrations in Experiment 1 (r=-0.63; P<0.05), but not in Experiment 2 (r=-0.28; P>0.10). In regard to CL heterogeneity, defined as the standard deviation of the mean pixel value of the luteal tissue, a time effect was observed following both natural (Experiment 1; P<0.009) and luteolysis-induced (Experiment 2; P<0.05) estrous cycles (P<0.05). Moreover, this variable was correlated with plasma progesterone concentrations (r=-0.71 and -0.58 in Experiments 1 and 2, respectively; P<0.01), indicating that CL images were more heterogeneous during metestrus and after luteolysis (functional regression). In summary, morphological and echotextural attributes were correlated with CL function and underwent similar changes during the estrous cycle. Luteal tissue heterogeneity, assessed by ultrasonography, is considered a potential indicator of CL functional status, because it is correlated to circulating progesterone concentrations. MenosIt has been suggested that ultrasound image attributes are a potential indicator of physiological and functional status of the corpus luteum (CL) in several species, including cattle. The aims of this study were to evaluate CL morphological, functional and echotextural characteristics, and also to investigate the hypothesis that those attributes are correlated and change similarly throughout an estrous cycle. Ovaries of crossbred (Bos taurus taurus x Bos taurus indicus) heifers were evaluated using ultrasonography daily throughout an interestrus interval using a B-mode, real-time ultrasound machine equipped with a 5 MHz linear-array rectal transducer, during a natural estrous cycle (Experiment 1; n=12) or during a shortened cycle, with luteolysis induction 10d after estrus (Experiment 2; n=6). Blood samples were collected for assay of plasma progesterone concentrations. Corpora lutea areas were measured and daily images of each CL were videotaped and digitized for computer-assisted analysis using custom-developed software. In Experiment 1, area of luteal tissue increased until a maximum value 10d after estrus (P<0.001), followed by a plateau phase, and then a decline beginning 14 d after estrus. Luteal tissue area was highly correlated to plasma progesterone concentrations (r=0.86; P<0.001). When luteolysis was induced in Experiment 2, loss of CL function (decrease in plasma progesterone concentrations to metestrous values) preceded tissue regression by 48 h (24h compared wi... Mostrar Tudo |
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Palavras-Chave: |
Cattle-ultrasonography; Echotexture; Heterogeneity; Pixel. |
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Thesaurus Nal: |
animal reproduction; corpus luteum. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03582naa a2200277 a 4500
001 1658399
005 2022-08-11
008 2009 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.anireprosci.2008.11.009$2DOI
100 1 $aSIQUEIRA, L. G. B.
245 $aInterrelationships among morphology, echotexture, and function of the bovine corpus luteum during the estrous cycle.$h[electronic resource]
260 $c2009
520 $aIt has been suggested that ultrasound image attributes are a potential indicator of physiological and functional status of the corpus luteum (CL) in several species, including cattle. The aims of this study were to evaluate CL morphological, functional and echotextural characteristics, and also to investigate the hypothesis that those attributes are correlated and change similarly throughout an estrous cycle. Ovaries of crossbred (Bos taurus taurus x Bos taurus indicus) heifers were evaluated using ultrasonography daily throughout an interestrus interval using a B-mode, real-time ultrasound machine equipped with a 5 MHz linear-array rectal transducer, during a natural estrous cycle (Experiment 1; n=12) or during a shortened cycle, with luteolysis induction 10d after estrus (Experiment 2; n=6). Blood samples were collected for assay of plasma progesterone concentrations. Corpora lutea areas were measured and daily images of each CL were videotaped and digitized for computer-assisted analysis using custom-developed software. In Experiment 1, area of luteal tissue increased until a maximum value 10d after estrus (P<0.001), followed by a plateau phase, and then a decline beginning 14 d after estrus. Luteal tissue area was highly correlated to plasma progesterone concentrations (r=0.86; P<0.001). When luteolysis was induced in Experiment 2, loss of CL function (decrease in plasma progesterone concentrations to metestrous values) preceded tissue regression by 48 h (24h compared with 72 h; P<0.001). The mean pixel value of ultrasound images did not change in Experiment 1 (P>0.70), but a day effect on this attribute was observed in Experiment 2 (P=0.052). In contrast, mean pixel value was correlated to plasma progesterone concentrations in Experiment 1 (r=-0.63; P<0.05), but not in Experiment 2 (r=-0.28; P>0.10). In regard to CL heterogeneity, defined as the standard deviation of the mean pixel value of the luteal tissue, a time effect was observed following both natural (Experiment 1; P<0.009) and luteolysis-induced (Experiment 2; P<0.05) estrous cycles (P<0.05). Moreover, this variable was correlated with plasma progesterone concentrations (r=-0.71 and -0.58 in Experiments 1 and 2, respectively; P<0.01), indicating that CL images were more heterogeneous during metestrus and after luteolysis (functional regression). In summary, morphological and echotextural attributes were correlated with CL function and underwent similar changes during the estrous cycle. Luteal tissue heterogeneity, assessed by ultrasonography, is considered a potential indicator of CL functional status, because it is correlated to circulating progesterone concentrations.
650 $aanimal reproduction
650 $acorpus luteum
653 $aCattle-ultrasonography
653 $aEchotexture
653 $aHeterogeneity
653 $aPixel
700 1 $aTORRES, C. A. A.
700 1 $aAMORIM, L. S.
700 1 $aSOUZA, E. D.
700 1 $aCAMARGO, L. S. de A.
700 1 $aFERNANDES, C. A. C.
700 1 $aVIANA, J. H. M.
773 $tAnimal Reproduction Science$gv. 115, n. 1/4, p. 18-28, 2009.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Biblioteca(s): |
Embrapa Agropecuária Oeste. |
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Data corrente: |
06/01/2014 |
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Data da última atualização: |
06/01/2014 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
ARAÚJO, E. de O.; MERCANTE, F. M.; VITORINO, A. C. T.; NUNES, D. P.; PAIM, L. P.; MENDES, D. A. E. |
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Afiliação: |
ÉRICA DE OLIVEIRA ARAÚJO, DOUTORANDA - UFGD; FABIO MARTINS MERCANTE, CPAO; ANTONIO CARLOS TADEU VITORINO, DOCENTE - UFGD; DANIELI PIERETTI NUNES, DOUTORANDA - UFGD; LEANDRO RAMÃO PAIM, DOUTORANDO - UFGD; DIEGO AUGUSTO ESPINDOLA MENDES, GRADUANDO - UFGD. |
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Título: |
Inoculação de Herbaspirillum seropedicae no desenvolvimento de genótipos de milho sob diferentes níveis de nitrogênio. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
In: SEMINÁRIO NACIONAL [DE] MILHO SAFRINHA, 12., 2013, Dourados. Estabilidade e produtividade: anais. Brasília, DF: Embrapa; Dourados: Embrapa Agropecuária Oeste, 2013. Editado por: Germani Concenço, Gessi Ceccon. 1 CD-ROM. |
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Idioma: |
Português |
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Palavras-Chave: |
Inoculation. |
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Thesagro: |
Inoculação; Milho. |
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Thesaurus NAL: |
corn. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/94740/1/108.ERICAINMOCULACAO.pdf
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Marc: |
LEADER 00803nam a2200205 a 4500
001 1975020
005 2014-01-06
008 2013 bl uuuu u00u1 u #d
100 1 $aARAÚJO, E. de O.
245 $aInoculação de Herbaspirillum seropedicae no desenvolvimento de genótipos de milho sob diferentes níveis de nitrogênio.
260 $aIn: SEMINÁRIO NACIONAL [DE] MILHO SAFRINHA, 12., 2013, Dourados. Estabilidade e produtividade: anais. Brasília, DF: Embrapa; Dourados: Embrapa Agropecuária Oeste, 2013. Editado por: Germani Concenço, Gessi Ceccon. 1 CD-ROM.$c2013
650 $acorn
650 $aInoculação
650 $aMilho
653 $aInoculation
700 1 $aMERCANTE, F. M.
700 1 $aVITORINO, A. C. T.
700 1 $aNUNES, D. P.
700 1 $aPAIM, L. P.
700 1 $aMENDES, D. A. E.
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Embrapa Agropecuária Oeste (CPAO) |
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