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A new method for cryopreservation of mouse spermatozoa
1Institute of Zoology, Zoological Society of London, Regent's Park, UK.
Journal of Reproduction and Fertility
|September 1, 1993
Summary
A novel cryoprotectant solution (mouse sperm cryoprotectant, MSC) improved mouse sperm cryopreservation. This method yielded motile sperm, successful in vitro fertilization, and live offspring development.
Area of Science:
- Reproductive Biology
- Cryobiology
- Mammalian Reproduction
Background:
- Cryopreservation of spermatozoa is crucial for preserving genetic material.
- Existing methods for mouse sperm cryopreservation have limitations in efficacy and viability.
Purpose of the Study:
- To develop and evaluate a new cryopreservation method for mouse spermatozoa.
- To assess the motility, fertilization capacity, and developmental potential of cryopreserved mouse sperm.
Main Methods:
- A modified TES-Tris diluent with egg yolk, sodium lauryl sulfate, and glycerol was used for cryoprotection (mouse sperm cryoprotectant, MSC).
- Epididymal spermatozoa were cryopreserved using a programmable cell freezer with controlled cooling rates.
- In vitro fertilization and embryo transfer to recipient mice were performed to assess viability.
Main Results:
- 25% of cryopreserved spermatozoa regained motility post-thawing.
- In vitro fertilization resulted in 50% of oocytes developing to the two-cell stage.
- Embryo transfer led to 16-17% development into viable fetuses and live offspring.
Conclusions:
- The developed mouse sperm cryoprotectant (MSC) method is effective for cryopreserving mouse spermatozoa.
- This technique supports successful in vitro fertilization and the generation of live offspring from cryopreserved sperm.