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- W2108209424 endingPage "2211" @default.
- W2108209424 startingPage "2206" @default.
- W2108209424 abstract "Gathering knowledge about the molecular events during preimplantation development is one of the most important challenges in in-vitro fertilization (IVF). The interleukin-1 (IL-1) system has been shown to be intimately involved in embryonic implantation. The aim of our study was to detect the major components of the IL-1 system in single blastomeres from human preimplantation embryos and to relate our findings to the further development of the biopsied embryos in vitro. Single blastomeres were removed from morphologically normal embryos obtained from dipronuclear zygotes and examined by reverse transcription (RT)-nested polymerase chain reaction (PCR). Expression of beta-actin (external standard), IL-1beta, IL-1 receptor antagonist (IL-1ra) and IL-1 receptor (IL-1R) type I mRNA were related to embryonic development and IVF outcome. Blastomeres from 12 embryos were examined: beta-actin and IL-1R type I mRNA were detected in all blastomeres (100%) whereas IL-1beta could be detected in only nine of the blastomeres (75%). IL-1ra was expressed in only two (17%) of the blastomeres and those were simultaneously positive for IL-1beta. Both IL-1ra positive embryos were arrested in development before reaching blastocyst stage. Five embryos (three of them IL-1beta mRNA positive and two IL-1beta mRNA negative) were transferred as blastocysts; none of the transfers resulted in a pregnancy. We postulate that embryos expressing IL-1ra mRNA in a detectable amount appear more likely to be arrested in early developmental stages." @default.
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- W2108209424 date "1998-08-01" @default.
- W2108209424 modified "2023-10-13" @default.
- W2108209424 title "Expression of interleukin-1 system mRNA in single blastomeres from human preimplantation embryos" @default.
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- W2108209424 doi "https://doi.org/10.1093/humrep/13.8.2206" @default.
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