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Mitochondria in human oogenesis and prei ... on and developmental competence
Mitochondria in human oogenesis and preimplantation embryogenesis: engines of metabolism, ionic regulation and developmental competence.
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Mitochondria are the most abundant organelles in the mammalian oocyte and early embryo. While their role in ATP production has long been known, only recently has their contribution to oocyte and embryo competence been investigated in the human. This review considers whether such factors as mitochondrial complement size, mitochondrial DNA copy numbers and defects, levels of respiration, and stage-specific spatial distribution, influence the developmental normality and viability of human oocytes and preimplantation-stage embryos. The finding that mitochondrial polarity can differ within and between oocytes and embryos and that these organelles may participate in the regulation of intracellular Ca(2+)homeostasis are discussed in the context of how focal domains of differential respiration and intracellular-free Ca(2+)regulation may arise in early development and what functional implications this may have for preimplantation embryogenesis and developmental competence after implantation.
Van Blerkom J
Reproduction (Cambridge, England)
2004-09-01 00:00
128
3
269-80
Blastocyst,Cell Respiration,DNA, Mitochondrial,Embryonic Development,Female,Humans,Hydrogen-Ion Concentration,Mitochondria,Oocytes,Oogenesis,Pregnancy,Reproductive Techniques, Assisted,DNA, Mitochondrial
Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, Colorado 80309, USA vanblerkspotcoloradoedu
Reproduction
1470-1626
10.1530/rep.1.00240
128/3/269
1194
True
15333778
