alexa Transplantation of germ cells from rabbits and dogs into mouse testes.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Dobrinski I, Avarbock MR, Brinster RL

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Abstract Spermatogonial stem cells of a fertile mouse transplanted into the seminiferous tubules of an infertile mouse can develop spermatogenesis and transmit the donor haplotype to progeny of the recipient mouse. When testis cells from rats or hamsters were transplanted to the testes of immunodeficient mice, complete rat or hamster spermatogenesis occurred in the recipient mouse testes, albeit with lower efficiency for the hamster. The objective of the present study was to investigate the effect of increasing phylogenetic distance between donor and recipient animals on the outcome of spermatogonial transplantation. Testis cells were collected from donor rabbits and dogs and transplanted into testes of immunodeficient recipient mice in which endogenous spermatogenesis had been destroyed. In separate experiments, rabbit or dog testis cells were frozen and stored in liquid nitrogen or cultured for 1 mo before transplantation to mice. Recipient testes were analyzed, using donor-specific polyclonal antibodies, from 1 to >12 mo after transplantation for the presence of donor germ cells. In addition, the presence of canine cells in recipient testes was demonstrated by polymerase chain reaction using primers specific for canine alpha-satellite DNA. Donor germ cells were present in the testes of all but one recipient. Donor germ cells predominantly formed chains and networks of round cells connected by intercellular bridges, but later stages of donor-derived spermatogenesis were not observed. The pattern of colonization after transplantation of cultured cells did not resemble spermatogonial proliferation. These results indicate that fresh and cryopreserved germ cells can colonize the mouse testis but do not differentiate beyond the stage of spermatogonial expansion.
This article was published in Biol Reprod and referenced in Journal of Stem Cell Research & Therapy

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