Meiosis activating sterol augments implantation rate

C - Chemistry – Metallurgy – 12 – N

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C12N 5/02 (2006.01) C07J 9/00 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2365225

The present invention relates to the use of a new principle for improving the viability and pregnancy potential of oocytes and pre-embryos obtained in connection with in vitro fertilisation and pre-embryo transfer treatment. More specifically, improvement by raising the content of Meiosis Activating Sterols (MAS) in the medium where the in vitro fertilisation takes place. This is achieved by exposing and culturing one or more oocytes with spermatozoa in a culture medium comprising at least one meiosis activating sterol (MAS), a MAS analogue, and/or an additive or additives capable of endogenous stimulation of the accumulation of at least one MAS. Preferred additives are FSH and EGF.

L'invention concerne l'utilisation d'un nouveau principe destiné à améliorer le potentiel de viabilité et de gestation d'ovocytes et de pré-embryons obtenus en rapport avec une fertilisation in vitro et avec un traitement de transfert de pré-embryon. Cette amélioration réside notamment dans l'élévation de la teneur en stérols d'activation de la méiose (MAS) dans le milieu dans lequel la fertilisation in vitro a lieu, et elle consiste à exposer et cultiver un ou plusieurs ovocytes avec des spermatozoïdes, dans un milieu de culture comprenant au moins un stérol d'activation de méiose (MAS), un analogue de MAS, et/ou un ou des additifs capables de stimuler de manière endogène l'accumulation d'au moins un MAS. En tant qu'additifs préférés, on peut citer l'hormone de stimulation du follicule et le facteur de croissance épidermique.

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