O artigo científico!!

Este é o artigo correcto sobre um "post" colocado ontem, no nosso primeiro dia. Como houve quem reclamasse a nossa capacidade de pesquisa, resolvemos deitar mãos à obra e fazer as coisas como devem ser.
De qualquer modo agradecemos a preocupação do nosso sempre atento e crítico colega, e também pedimos desculpas pela nossa (minha) falta de rigor, mas estávamos apenas na fase de experimentação e de demonstração daquilo que pretendemos com este blogue.

Este é o verdadeiro artigo:

EMBRYONIC STEM CELLS:

Xin Zhang, Petra Stojkovic, Stefan Przyborski, Michael Cooke, Lyle Armstrong, Majlinda Lako, Miodrag Stojkovic

"Derivation of human embryonic stem cells from developing and arrested embryos"

Stem Cells First published online September 21, 2006; doi:doi:10.1634/stemcells.2006-0377

Trancrevemos o Abstract mas recomendamos a leitura do artigo completo neste endereço em pdf: http://stemcells.alphamedpress.org/cgi/reprint/2006-0377v1.pdf

"ABSTRACT
Human embryonic stem cells (hESC) hold huge promise in modern regenerative medicine, drug discovery, and as a model for studying early human development. However, usage of embryos and
derivation of hESC for research and potential medical application has resulted in polarised ethical
debates since the process involves destruction of viable developing human embryos. Here we describe that not only developing embryos (morulae and blastocysts) of both good and poor quality
but also arrested embryos could be used for the derivation of hESC. Analysis of arrested embryos demonstrated that these embryos express pluripotency marker genes such OCT4, NANOG and REX1. Derived hESC lines also expressed specific pluripotency markers (TRA-1-60, TRA-1-81, SSEA4, alkaline phosphatase, OCT4, NANOG, TERT and REX1) and differentiated under in vitro and in vivo conditions into derivates of all three germ layers. All the new lines including line derived from late arrested embryo have normal karyotype. These results demonstrate that arrested embryos are additional valuable resources to surplus and donated developing embryos and should
be used to study early human development or derive pluripotent hESC. "