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Registro Completo |
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
18/02/2014 |
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Data da última atualização: |
10/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
DALCIN, L.; SILVA, R. C.; PAULINI, F.; SILVA, B. D. M.; NEVES, J. P.; LUCCI, C. M. |
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Afiliação: |
UnB; UnB; UnB; BIANCA DAMIANI MARQUES SILVA, CENARGEN; UnB; UnB. |
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Título: |
Cytoskeleton structure, pattern of mitochondrial activity and ultrastructure of frozen or vitrified sheep embryos. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Cryobiology, v.67, n. 2, p. 137-145, 2013. |
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Idioma: |
Inglês |
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Conteúdo: |
Even though sheep embryo cryopreservation is a commonly used procedure the survival and pregnancy outcomes can vary greatly. This study investigated whether cryopreservation was causing subtle changes in ultrastructure, mitochondrial activity or cytoskeletal integrity. Sheep embryos were either slow cooled in 1.5 M EG (n = 22), or vitrified in 20% EG + 20% DMSO with 0.5 M sucrose in Open Pulled Straws (OPS) (n = 24). One hour after warming the cryopreserved embryos differed from control embryos in that they had no mitochondrial activity combined with cytoskeletal disorganization and large vesicles. Vitrified embryos also showed many points of cytoskeleton disruption. Ultrastructural alterations resulting from actin filaments disorganization were observed in both cryopreserved groups. This includes areas presenting no cytoplasmic organelles, Golgi complex located far from the nucleus and a decrease of specialized intercellular junctions. Additionally, large vesicles were observed in vitrified morulae and early blastocysts. The alterations after cryopreservation were proportional to embryo quality as assessed using the stereomicroscope. Even in the absence of mitochondrial activity, grade I and II cryopreserved embryos contained mitochondria with normal ultrastructure. Embryos classified as grade I or II in the stereomicroscope revealed mild ultrastructural alterations, meaning that this tool is efficient to evaluate embryos after cryopreservation. |
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Palavras-Chave: |
Congelamento lento; Microscopia confocal; Microscopia eletrônica de transmissão; Organelas; Vitrificação. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/179941/1/1-s2.0-S0011224013001661-main.pdf
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Marc: |
LEADER 02202naa a2200241 a 4500
001 1980419
005 2023-03-10
008 2013 bl uuuu u00u1 u #d
100 1 $aDALCIN, L.
245 $aCytoskeleton structure, pattern of mitochondrial activity and ultrastructure of frozen or vitrified sheep embryos.$h[electronic resource]
260 $c2013
520 $aEven though sheep embryo cryopreservation is a commonly used procedure the survival and pregnancy outcomes can vary greatly. This study investigated whether cryopreservation was causing subtle changes in ultrastructure, mitochondrial activity or cytoskeletal integrity. Sheep embryos were either slow cooled in 1.5 M EG (n = 22), or vitrified in 20% EG + 20% DMSO with 0.5 M sucrose in Open Pulled Straws (OPS) (n = 24). One hour after warming the cryopreserved embryos differed from control embryos in that they had no mitochondrial activity combined with cytoskeletal disorganization and large vesicles. Vitrified embryos also showed many points of cytoskeleton disruption. Ultrastructural alterations resulting from actin filaments disorganization were observed in both cryopreserved groups. This includes areas presenting no cytoplasmic organelles, Golgi complex located far from the nucleus and a decrease of specialized intercellular junctions. Additionally, large vesicles were observed in vitrified morulae and early blastocysts. The alterations after cryopreservation were proportional to embryo quality as assessed using the stereomicroscope. Even in the absence of mitochondrial activity, grade I and II cryopreserved embryos contained mitochondria with normal ultrastructure. Embryos classified as grade I or II in the stereomicroscope revealed mild ultrastructural alterations, meaning that this tool is efficient to evaluate embryos after cryopreservation.
653 $aCongelamento lento
653 $aMicroscopia confocal
653 $aMicroscopia eletrônica de transmissão
653 $aOrganelas
653 $aVitrificação
700 1 $aSILVA, R. C.
700 1 $aPAULINI, F.
700 1 $aSILVA, B. D. M.
700 1 $aNEVES, J. P.
700 1 $aLUCCI, C. M.
773 $tCryobiology$gv.67, n. 2, p. 137-145, 2013.
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Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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| 1. |  | DALCIN, L.; SILVA, R. C.; PAULINI, F.; SILVA, B. D. M.; NEVES, J. P.; LUCCI, C. M. Cytoskeleton structure, pattern of mitochondrial activity and ultrastructure of frozen or vitrified sheep embryos. Cryobiology, v.67, n. 2, p. 137-145, 2013.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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