جستجوی مقالات مرتبط با کلیدواژه "pgp9.5" در نشریات گروه "پزشکی"

Spermatogonial stem cells (SSCs) are able to establish balance between self-renewal and differentiation, thereby maintain the spermatogenesis. The aim of this study was to investigate effects of different doses of Testosterone on SSCs colony formation.
The cells were isolated from testes of prepubertal lambs by two-step enzymatic digestion and then purified by differential platting. The cells were cultured for 13 days in 4 groups: Control [DMEM containing antibiotic (1%) and FBS (5%)]; and Treatment groups 1, 2 and 3 (DMEM䷫ⶢ쭞꺉 60, 120 and 240 µg/ml, respectively). The culture media was changed every 72 h. Identification of SSCs was performed by immunocytochemistry staining against PGP9.5. Finally, following the evaluation of percentage for viability rate of SSCs immediately after isolation and also the number and surface areas of the colonies on days 5, 9 and 13 after the beginning of culturing by invert microscopy, the analyses were made using statistical tests.
The percentage for viability rate of SSCs after isolation was 86.77±3.63%. The decrease in the number and surface areas of spermatogonial colonies in Treatment groups 2 and 3 were significant compared to Control and Treatment group1 (P The results of this study showed that Testosterone has no effect on colony induction of SSCs in vitro. Increasing the Testosterone dose decreases the colony number and surface area of SSCs.

Spermatogonial stem cells (SSCs) have diverse applications in reproductive medicine and biotechnology. Cryopreservation is the well-known method for long-term storage of these cells. The aim of this study was to investigate the effect of different concentrations of fetal bovine serum (FBS) and Sucrose on the viability rate of spermatogonial cells.
Testicular cells of pre-pubertal lambs were separated in a two-step enzymatic isolation and purified by differential plating. Then, the cells were divided in 6 groups. Groups 1, 2 and 3 were treated with FBS (10%) and Sucrose (0.07, 0.14 and 0.21 molar concentration (M) ) and groups 4, 5 and 6 with FBS (20%) and Sucrose (0.07, 0.14 and 0.21 M), respectively. The viability rate of the cells was evaluated immediately after isolation, addition of cryoprotectant agents and thawing procedures. Identification of spermatogonial cells in the culture was performed using the immunocytochemistry staining against PGP9.5.
The results showed that cryoprotectant do not have any harmful effects on lamb´s SSCs. Moreover, viability rate of the cells in freezing media containing FBS (10%) is significantly higher than the media containing FBS (20%). Furthermore, increasing concentrations of Sucrose (0.07, 0.14 and 0.21 M) had no beneficial effect on the spermatogonial viability rate.
It was concluded that freezing media containing dimethyl sulfoxide (10%) and FBS (10%) and Sucrose (0.07 M) is appropriate for cryopreservation of lamb spermatogonial cells.