Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.4/564
Título: Cytogenetic analysis of spontaneously activated noninseminated oocytes and parthenogenetically activated failed fertilized human oocytes--implications for the use of primate parthenotes for stem cell production
Autor: Almeida-Santos, T
Dias, C
Henriques, P
Brito, R
Barbosa, A
Regateiro, FJ
Almeida-Santos, A
Palavras-chave: Análise Citogenética
Células Estaminais
Partenogénese
Oócitos
Data: 2003
Editora: Springer
Citação: J Assist Reprod Genet. 2003 Mar;20(3):122-30
Resumo: PURPOSE:Spontaneous parthenogenetically activated noninseminated oocytes and failed fertilized oocytes after ART activated by puromycin were studied to assess cleavage ability and the cytogenetic constitution of the resulting embryos. METHODS: Failed fertilized oocytes were exposed to puromycin, and whenever activation occurred, they were further cultured until arrest of development. FISH was used to assess the ploidy of spontaneous (group A) and induced parthenotes (group B). RESULTS: The mean number of oocytes exposed to puromycin and the percentage and type of activation were identical in IVF and ICSI patients. The more frequent types of activation were one or two pronuclei and one polar body suggesting that retention of the second polar body is a common event after parthenogenetic activation. CONCLUSIONS: Retention of the second polar body and chromosome malsegregation were observed after parthenogenetic activation, either spontaneous or induced by puromycin. This means that using parthenogenetic embryos for stem cell research will require great care and attention.
URI: http://hdl.handle.net/10400.4/564
Aparece nas colecções:GEN - Artigos

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Cytogenetic analysis of spontaneously activated.pdf623,78 kBAdobe PDFVer/Abrir


Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.