Human Reproduction, Vol. 17, No. 11, 2948-2949,
November 2002
© 2002 European Society of Human Reproduction and Embryology
Associated editor's comment: Calcium signalling in human oocytes and embryos: two-store model revival
Associate editor’s comment on the article ‘Calcium-binding proteins and calcium-release channels in human maturing oocytes, pronuclear zygotes and early preimplantation embryos’ by H. Balakier et al.
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Since the first observations showing that sperm-induced activation of mouse oocytes is mediated by sustained oscillations of intracellular free calcium concentration (Cuthbertson and Cobbold, 1985
), similar patterns of sperm-induced calcium signals have been observed in various other mammalian species (Jones, 1998; review). Sperm-induced calcium oscillations were also observed in human oocytes, both after conventional IVF (Taylor et al., 1993) and after ICSI (Tesarik et al., 1994; Tesarik and Sousa, 1994).
The rapid expansion of clinical applications of ICSI in the early-to-mid 1990s raised considerable concern about the safety of this technique, which prompted research into the differences in the form of sperm-induced calcium signals generated in conventionally-fertilized and ICSI-treated oocytes. It was
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