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July 28, 2021Frontiers in EndocrinologyOpen Access

Electrofusion Stimulation Is an Independent Factor of Chromosome Abnormality in Mice Oocytes Reconstructed via Spindle Transfer

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Authors

WWWei WangNorthwest A&F UniversitySSSuxia ShaoHebei Medical UniversityWCWei ChenWannan Medical College

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Overview

Experimental study reveals electrofusion stimulation causes chromosome abnormalities in reconstructed mouse oocytes, indicating that electric pulses induce premature egg activation.

Key Points

  • To identify the mechanisms underlying chromosome abnormalities during spindle transfer and determine the direct effects of electrofusion stimulation on reconstructed oocytes.
  • Conducted electrofusion spindle transfer in C57BL/6N mouse oocytes under standard, calcium-free, and room-temperature conditions.
  • Assessed maturation-promoting factor (MPF) activity, spindle morphology, gamma-tubulin localization, and chromosome alignment across varying numbers of electrical pulses and enucleation states.
  • Electrofusion stimulation acted as an independent driver of chromosome abnormalities and spindle defects by lowering MPF activity and causing premature activation, unaffected by calcium, temperature, or enucleation.
  • Increased numbers of electrical pulses exacerbated chromosomal misalignment and spindle malformations, identifying a maximum threshold of two pulses for procedure safety.
  • Culturing embryos to the blastocyst stage filtered out abnormal embryos but significantly reduced total usable embryos; 37°C without calcium provided the optimal electrofusion environment.

Cite This Study

Wang et al. (2021) studied this question.

synapsesocial.com/papers/6a1ea79d5dae381e029a69fbhttps://doi.org/10.3389/fendo.2021.705837
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