This article will provide an updated review of spermatogonial stem cells and their role in maintaining the spermatogenic lineage. Experimental tools used to study spermatogonial stem cells (SSCs) will be described, along with research using these tools to enhance our understanding of stem cell biology and spermatogenesis. Increased knowledge about the biology of SSCs improves our capacity to ma...

Potential therapeutic use of stem cells in the treatment of human diseases depends on our ability to control the balance of their differentiation and self-renewal in vitro and in vivo. The stem cell "niche," or specialized microenvironment, is now recognized as one of the major contributors to this regulation in many species. Our recent study, which was reported in Nature, was the first to demo...

Regulation of the germ stem cell niche as the foundation for adult spermatogenesis: A role for miRNAs?' Seminars in Cell and Developmental Biology, vol 29C, pp. 76-83. General rights Copyright for the publications made accessible via the Edinburgh Research Explorer is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recog...

The objective of this study was to develop a short-term culture system for buffalo spermatogonial stem cells (SSCs) in various culture conditions. Spermatogonial stem cells as well as sertoli cells were isolated from prepubertal buffalo calf testes and enriched to culture for two weeks in a serum-free medium. The serum-free medium was supplemented with various concentrations of serum (FBS) or f...

objective: it is hypothesized that stem cells have the capability to form tumors after transplantation. spermatogonial stem cells have proliferation potency and colonization ability related to express pluripotency genes such as c-myc. the primary aim of this study is to investigate tumorigenicity ability of these cells after in vitro cultivation and inoculation in athymic animals. methods: sper...

Twenty years ago, the transplantation of spermatogonial stem cells (SSCs) from a mouse to other recipient mice was shown to be feasible, which clearly demonstrated the functional identity of SSCs. Since then, several important new findings and other technical developments have followed, which included a new hypothesis on their cell kinetics and spermatogonial hierarchy in the testis, a culture ...

enrichment of cell suspension with germ cells prior to injection into recipient seminiferous tubules is of importance in spermatogonial stem cells (sscs) transplantation. knock-out serum replacement (ksr) has been reported to enhance the proliferation of murine sscs and human embryonic stem cells. the aim of the present study was to investigate the effect of ksr versus fetal bovine serum (fbs) ...

Spermatogonial stem cell transfer has been studied in various species and suggested potential for success. Bull, stallion, donkey, mule, boar, dog and cat testicles were examined using various injection techniques to determine distribution patterns of injected material most favorable for stem cell transfer. Spermatogonial stem cells were recovered from freshly harvested stallion testicles using...

At the apical tip of Drosophila testis, there is a stem cell niche known as the proliferation center, where the stem cells are maintained by hub cell cluster for the regulation of differentiation and proliferation. Germline stem cells go through mitosis four times from one primary spermatogonial cell to the 16-cell stage before the maturation. The cells derived from the same germline stem cell ...