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Related Experiment Videos

Nuclear transfer methods to study aging.

Lin Liu1, David L Keefe

  • 1Department of Obstetrics and Gynecology, Women &Infants Hospital, Brown Medical School, Providence, RI, USA.

Methods in Molecular Biology (Clifton, N.J.)
|July 20, 2007
PubMed
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Older maternal age impacts egg quality and early embryo development. Nuclear transfer techniques effectively investigate nuclear-cytoplasmic interactions in aging oocytes and zygotes, revealing origins of reproductive aging defects.

Area of Science:

  • Reproductive Biology
  • Developmental Biology
  • Cell Biology

Background:

  • Maternal age is a critical factor influencing oocyte quality and early embryonic development.
  • Defects in nuclear or cytoplasmic factors contribute to meiotic errors and developmental issues in aged oocytes.
  • Nuclear transfer (NT) is a valuable technique for dissecting nuclear-cytoplasmic interactions in early embryos.

Purpose of the Study:

  • To describe a nuclear transfer protocol for investigating nuclear-cytoplasmic interactions in aging oocytes and zygotes.
  • To differentiate between nuclear and cytoplasmic contributions to age-related meiotic defects in oocytes.
  • To examine nuclear and cytoplasmic abnormalities and apoptosis during early development in aged female reproductive systems.

Main Methods:

Related Experiment Videos

  • Utilizing nuclear transfer at the germinal vesicle (GV) stage to assess nucleus versus cytoplasmic origin of aging-associated meiotic defects.
  • Applying nuclear transfer at the zygote stage to analyze nuclear and cytoplasmic abnormalities and apoptosis.
  • Ensuring minimal insult to oocytes and embryos during nuclear transfer to maintain efficiency and developmental integrity.

    • Main Results:

    • The described nuclear transfer technique is efficient and minimally disruptive to meiosis and early embryo development.
    • The protocol allows for the investigation of age-related defects originating from either the oocyte nucleus or cytoplasm.
    • Nuclear transfer at the zygote stage enables the study of developmental abnormalities and programmed cell death.

    Conclusions:

    • Nuclear transfer is an effective method for studying female reproductive aging at the oocyte and zygote levels.
    • This technique helps elucidate the distinct roles of nuclear and cytoplasmic factors in age-related reproductive decline.
    • Understanding these interactions is crucial for addressing fertility challenges associated with advanced maternal age.