Nitric oxide is an important intraovarian regulatory factor. The periimplantation period is a critical phase in mouse development. Although it was shown that nitric oxide plays an essential role during gestation, its role in the preimplantation period is not yet fully clear. We studied the involvement of nitric oxide in developmental competence (embryonic defects and morphology of pre- and postimplantation embryos) using nitric oxide synthase inhibitors, which suppress all forms of nitric oxide synthase, and female mice, to which the inhibitors had been administered before their mating with intact males. The level of mortality of pre- and postimplantation embryos in females mated to intact males increased soon after the administration of inhibitors. Studies of the morphology of embryos have shown that there was a delay in embryogenesis at the stages of cleavage and gastrulation. The results obtained suggest that nitric oxide is a potent regulator of embryonic differentiation, specifically in pre- and postimplantation mouse embryos.
Russian Journal of Developmental Biology – Springer Journals
Published: Dec 30, 2004
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