Abstract
Purpose
The present study by using different growth factors was aimed to develop the best practical culture condition for purification of goat undifferentiated SSCs and their colonization under in vitro and in vivo conditions.
Methods
The enzymatically isolated SSCs obtained from one month old goat testes were cultured in DMEM plus FCS supplemented with different sets of growth factors (GDNF, LIF, bFGF, and EGF) for 2 weeks. At the end of each week, the morphological characteristics of cells and colonies alongside with purification rate of undifferentiated type A spermatogonia were evaluated by immunocytochemical staining and flow cytometry.
Results
The number and size of colonies in treatment groups were significantly (P < 0.01) higher than corresponding values in control group. In immunocytochemical evaluation, the proportion of KIT and PGP9.5 positive cells were significantly (P < 0.001) higher in control and treatment groups, respectively.
Conclusions
The culture medium comprising all four growth factors, especially the one supplemented with the higher concentration of GDNF, was superior to the other groups with respect to the population of undifferentiated type A spermatogonia and its propagation in culture system. Additionally, goat SSCs could colonize within the mouse testis following xenotransplantation.
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Acknowledgments
The authors would like to thank the Avicenna Research Institute for technical and financial supports, ACECR, Tehran.
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Mohammad Sadra Shirazi and Banafsheh Heidari these authors contributed equally to the work.
Capsule Spermatogonial stem cells are the foundation of spermatogenesis. Addition of growth factors to the culture medium could effectively retain the undifferentiation status of goat SSCs. The culture medium containing higher concentration of GDNF was superior to the other groups comprising either the lower concentration of GDNF or other combinations of growth factors. The colonization of goat SSCs within the mouse testis following xenotransplantation, was promising in male fertility preservation and production of transgenic animals.
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Shirazi, M.S., Heidari, B., Shirazi, A. et al. Morphologic and proliferative characteristics of goat type a spermatogonia in the presence of different sets of growth factors. J Assist Reprod Genet 31, 1519–1531 (2014). https://doi.org/10.1007/s10815-014-0301-5
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DOI: https://doi.org/10.1007/s10815-014-0301-5