Репозиторий Университета

© 2019 John Wiley  &  Sons, Ltd. Spermatogenesis is a process in which animals generate spermatozoa from spermatogonial stem cells (SSCs). Successful in vitro differentiation of SSCs towards spermatids holds a significant promise for regeneration of impaired spermatogenesis. The present study aims to evaluate the efficiency of a 3D culture containing naringenin on proliferation and differentiation potentials of mouse SSCs. In this study, multi-walled carbon nanotubes (MWCNTs) were incorporated into poly(l-lactic acid) (PLLA) fibers via electrospinning technique. The fibrous PLLA/MWCNTs were studied by Fourier-transform infrared spectroscopy (FTIR), transmission electron microscope (TEM), water contact angle measurements, electrical conductivity, and mechanical properties. Next, the SSCs were seeded into the PLLA/MWCNTs scaffolds and exhibited preferable survival and differentiation efficiency to subsequent cell lines. To shed more light on this matter, the immunocytochemistry, reverse-transcription polymerase chain reaction (RT-PCR), and qRT-PCR results showed that the aforementioned cells on the 3D fabrics overexpressed the C-kit and SYCP3 proteins. In addition, the reactive oxygen species (ROS) measurement data demonstrated that naringenin, an effective antioxidant, plays an important role in in vitro spermatogenesis. Taken together, the results of this study revealed the synergistic effects of 3D scaffolds and naringenin for efficient spermatogenesis in laboratories.

© 2018 Stavropol State Medical University. All rights reserved. Male fertility is based on complex intracellular signaling during spermatogenesis. Effect of Interleukin-1 (IL-1) and its homologues on spermatogenesis is actively studied. Nevertheless, its role in idiopathic infertility has not been sufficiently studied, especially in the phase of hypospermatogenesis. Aim: Evaluation of the expression of IL-1α, IL-1β and IL-1ra in human seminiferous tubules in idiopathic infertility. A retrospective study involved men (n=54) who complained of childlessness in a marriage for 2 years with the diagnosis of idiopathic infertility, established after a physical, medico-genetic, biochemical (hormone) and cytological (spermogram) analysis. The biopsy specimens obtained from the operation, as well as the autopsy material of men aged 22-35 years (n=10), were studied using the immunohistochemical method (antibodies: IL-1α, IL-1β and IL-1ra). At hypo-spermatogenesis, the maturation block, and Sertoli-cell syndrome, Leydig cells are marked to IL-1α, IL-1β labeling with a decrease in IL-1ra. Sertoli cells and germ cells show weak responses to IL-1α, IL-1β and their absence on IL-1ra. Thus, the different levels of expression of IL-1α, IL-1β and IL-1ra indicate that these cytokines control spermatogenesis and are one of the triggers in the formation of male infertility form-phases.