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[Cryopreservation of mouse spermatozoa].

T Takeshima1, N Nakagata, S Ogawa

  • 1Imamichi Institute for Animal Reproduction, Ibaraki, Japan.

Jikken Dobutsu. Experimental Animals
|October 1, 1991
PubMed
Summary

The optimal cryopreservation of mouse spermatozoa involves 18% raffinose and 3% skim milk. This method preserves sperm motility, enabling successful in vitro fertilization and the development of viable offspring.

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Area of Science:

  • Reproductive Biology
  • Cryobiology
  • Spermatozoa Preservation

Context:

  • Sperm cryopreservation is crucial for assisted reproductive technologies and genetic resource banking.
  • Optimizing cryoprotective agents is essential for maintaining sperm viability post-thaw.

Purpose:

  • To determine the optimal concentration of raffinose in combination with skim milk for cryopreserving mouse spermatozoa.
  • To evaluate the efficacy of cryopreserved spermatozoa in subsequent in vitro fertilization and embryo development.

Summary:

  • Mouse spermatozoa were suspended in varying concentrations of raffinose (12-21%) and 3% skim milk, then cryopreserved in liquid nitrogen.
  • Sperm motility was highest after thawing when using 18% raffinose and 3% skim milk.
  • In vitro fertilization with these spermatozoa resulted in pronuclear oocytes (35.9%) and 2-cell embryos (33.6%), with 45.2% developing into live young after transfer.

Impact:

  • Establishes an effective cryopreservation protocol for mouse spermatozoa using raffinose and skim milk.
  • Provides a foundation for improving sperm banking strategies in research and conservation.
  • Demonstrates the potential for high post-thaw viability and developmental competence of cryopreserved mouse sperm.

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