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Potential for cloning dogs.
M E Westhusin1, R C Burghardt, J N Ruglia
1Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine, Texas A&M University, College Station, TX 77845, USA.
Journal of Reproduction and Fertility. Supplement
|January 15, 2002
Summary
Cloning dogs via nuclear transplantation showed limited success. Canine oocytes resulted in embryo cleavage but no pregnancies, while bovine oocytes led to early conceptus development, highlighting challenges in companion animal cloning.
Area of Science:
- Reproductive Biology
- Animal Cloning
- Veterinary Science
Background:
- The demand for cloned companion animals, particularly dogs, is significant.
- Nuclear transplantation is a key technique in animal cloning.
Purpose of the Study:
- To investigate the feasibility of cloning dogs using adult female fibroblasts.
- To evaluate the efficiency of canine and bovine oocytes as recipients for canine nuclear transfer.
Main Methods:
- Fibroblasts from adult female dogs were used as nuclear donors.
- Nuclear transfer involved fusing fibroblasts with enucleated canine or bovine oocytes.
- Embryos were cultured in vitro and transferred to surrogate mothers.
Main Results:
- Using canine oocytes, 23% of reconstructed embryos cleaved, but no pregnancies were established.
- Using bovine oocytes, 38-43% of embryos reached the 2- to 16-cell stage.
- Transfer of 47 bovine oocyte-derived embryos resulted in one early conceptus that arrested development.
Conclusions:
- Successful dog cloning via nuclear transplantation remains challenging.
- Further research is needed in oocyte maturation and estrous cycle control for successful companion animal cloning.