Genome editing tools have revolutionized the generation of genetically modified animals including livestock. In particular, the domestic pig is a proven model of human physiology and an agriculturally important species. In this study, we utilized the CRISPR/Cas9 system to edit the NANOS2 gene in pig embryos to generate offspring with mono-allelic and bi-allelic mutations. We found that NANOS2 k...

background: the present study was designed to evaluate the survival and proliferation of spermatogonial stem cells from cryptorchid mouse testis in co-culture system over a 3 weeks period. materials and methods: sertoli and spermatogonial cells were isolated from bilateral cryptorchid mouse model testes. isolated spermatogonial cells were co-cultured with sertoli cells in minimal essential medi...

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...

In this issue of Endocrinology, there is a rapid communication by Mahato et al. (1) that addresses the issue of estrogen action directly on germinal cells in the testis. The authors transplanted germ cells from the testis of the estrogen receptor a (ERa) knockout mice into the seminiferous tubules of germ cell-depleted wild-type mice. The germ cells carrying the knockout mutation underwent qual...

Quercetin, a dietary-derived falvonol-type flavonoid, is ubiquitous in fruits and vegetables and plays important roles in human health by virtue of its antioxidant function. The present study was performed to investigate effects of quercetin on oxidative damage that was induced by an environmental endocrine disrupter, Aroclor 1254 (A1254), in cultured spermatogonial cells of embryonic chickens....

The present study examines the existence of clonogenic patterns in the proliferation and differentiation of spermatogonial stem cells in two species of non-human primates, the marmoset and the rhesus monkey. We developed a novel approach to detect proliferating spermatogonial clones in whole mounts of seminiferous tubules. Dual fluorescence labeling of bromodeoxyuridine and acrosin in conjuncti...