نتایج جستجو برای: s retinoic acid
تعداد نتایج: 1400096 فیلتر نتایج به سال:
Background: Urtica dioica (UD), as a natural antioxidant, has positive effects on oocyte maturation. This study aimed to investigate the effects of hydro-alcoholic UD extract and retinoic acid on follicular development in an in vitro fertilization (IVF) condition. Methods: A total of 40 female Wistar rats were randomly divided into 5 groups: group 1 received normal saline, group 2 was given...
Background and Objectives: Retinoic acid has a major role in a variety of biological processes including growth and differentiation. One of these effects is epithelialization seen in blastema tissue exposed to different concentration of retinoic acid, due to its embryo-like cells. The main objective of this research was to investigate an experimental studies of employed different concentratio...
in this review, we aim to examine the effect of extrinsic and intrinsic factors on spermatogenesis process taking into account a complex signaling pathway. primarily, it is suggested that retinoic acid (ra) has a vital function in spermatogenesis process and it is considered to be essential for completion of spermatogonia into mature spermatozoa. in the present review, the key effects of retino...
the purpose of this study was to compare the efficacy of retinoic acid 0.05% with triamcinolone acetonide 0.1%, both in an oral base, in the treatment of atrophic and erosive oral lichen planus. thirty patients with clinically proven oral lichen planus were asked to participate in the study. the severity of lesions was scored from 0 (no lesion) to 5 (large erosion), and symptoms were scored ran...
Objective(s): Sertoli cells support in vivo germ cell production; but, its exact mechanism has not been well understood. The present study was designed to analyze the effect of Sertoli cells in differentiation of mouse embryonic stem cells (mESCs) to germ cells. Materials and Methods: A fusion construct composed of a Stra8 gene promoter and the coding region of enhanced green fluorescence p...
The mechanisms underlying the growth-inhibitory effect of retinoids on normal human B lymphocytes are not well understood. We addressed this issue by examining the effect of retinoic acid on the cell cycle machinery involved in G1/S transition. When retinoic acid was administered to B cells stimulated into mid to late G1 by anti-IgM antibodies (anti-μ) and Staphylococcus aureus crude cell suspe...
OBJECTIVE To determine whether decreased testicular levels of enzymes necessary for retinoic acid biosynthesis were associated with male infertility, as retinoic acid is known to be necessary for spermatogenesis. DESIGN Observational analysis of testicular tissue samples, sperm indices, and serum hormone concentrations. SETTING Two infertility centers in Chile. PATIENT(S) 32 infertile men...
retinoic acid and rosa damascena are compounds that have considerable effects in the cellular proliferation and synthesis of extracellular matrix. the present study was designed to assess the combined effects of retinoic acid and rosa damascena mill on wound in diabetic rats. seventy-two rats were used in this study. diabetes was induced by a single intraperitoneal injection of streptozotocin (...
Objective(s):To culture thein vitro mouse embryonic stem cells (mESCs) and to direct their differentiation to germ-line cells; in present study we used a vector backbone containing the fusion construct Stra8-EGFP to select differentiated ES cells that entered meiosis. Retinoic acid was used to differentiate embryonic stem cells to germ cells. Materials and Methods: A fragment of Stra8 gene pr...
Background: spacecrafts rotate around the Earth every 90 minutes, so the 24-hour cycle turns to 90 minutes. Retinoic acid, an active metabolite of vitamin A, plays a role in regulating the circadian rhythm and its deficiency can impair the biological clock function and consequently impair the circadian rhythm of locomotor activity. The goal of the study was to assay the effects of simulated spa...
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