Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/8491
Title: 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
Authors: Santos, T. Almeida 
Dias, C. 
Henriques, P. 
Brito, R. 
Barbosa, A. 
Regateiro, F. 
Santos, A. Almeida 
Keywords: FISH; Human oocytes; Parthenogenetic activation; Puromycin; Stem cell production
Issue Date: 2003
Publisher: Plenum Publishing Corporation
Citation: Journal of Assisted Reproduction and Genetics. 20:3 (2003) 122-130
Serial title, monograph or event: Journal of Assisted Reproduction and Genetic
Volume: 20
Issue: 3
Abstract: 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/10316/8491
DOI: 10.1023/A:1022630924236
Rights: openAccess
Appears in Collections:FMUC Medicina - Artigos em Revistas Internacionais

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