OBJECTIVE Ovarian and follicle transplantation may preserve fertility in young cancer survivors. In this study, we have transplanted preantral follicles using fibrin gel as a carrier and fibrin gel supplemented with platelet lysate (PL) as a rich source of angiogenic and growth factors. The purpose of this study was to evaluate the role of fibrin gel and PL in follicle transplantation. MATERI...

The extent, causes, and physiological significance of the variation in number of follicles growing during ovarian follicular waves in human beings and cattle are unknown. Therefore, the present study examined the variability and repeatability in numbers of follicles 3 mm or greater in diameter during the follicular waves in bovine estrous cycles, and we determined if the variation in number of ...

Intra-ovarian regulation of follicular maturation is modulated by various factors. Among these, growth factors are important local actors. We examined the immunohistochemical localization of transforming growth factor alpha (TGF-alpha), epidermal growth factor (EGF) and epidermal growth factor receptor (EGF-R) in 18 human ovaries. The concentration of TGF-alpha and EGF in follicular fluid was m...

Ten, 4to 6-week-old BALB/c mice were randomly assigned to either control (non-vitrified, n = 5) or treatment (vitrified, n = 5) groups. Ovaries in the vitrified group were frozen sequentially by immersion into two vitrification solutions VS1: 10% ethylene glycol (EG) + 10% DMSO in holding medium (TCM-199 + 20% FBS) and VS2: 20% EG + 20% DMSO in holding medium. After thawing at 37 °C in 1.0 M su...

Daily transrectal ultrasonography was carried out in eight 4-5-month-old Polish Large White×Polish Landrace gilts for 42 days to monitor the growth of individual ovarian antral follicles≥2 mm in diameter. In total, 52.4±16.2 and 123.0±6.7 follicles per gilt (mean±SD) that grew to ≥4 mm were identified during the first and second 21-day study periods, respectively (P<0.01). Four follicular waves...

Although earlier studies focused on the hormonal regulation of antral and preovulatory follicles, recent studies indicate the importance of the hormonal control mechanism for preantral follicles. The endocrine hormone FSH is not only a survival factor for early antral follicles but also a potent growth and differentiation factor for preantral follicles. In addition, KGF secreted by theca cells ...

This study investigated how Michauxia campanuloides affects the Proliferating Cell Nuclear Antigen (PCNA) expression in granulosa cells, ovarian histomorphology and serum total antioxidant capacity (TAC) rats. Rats were divided into control (C), treatment 1 (T 1) 2 2) groups. The rats T groups received aqueous extract of M. at doses 20 mg/kg/day 40 orally for 21 days, respectively. Serum TAC le...

The sand rat (Psammomys obesus) constitutes a model to study seasonal changes and several metabolic disorders. In order to perform breeding laboratory conditions, the reproductive function of this species living in North Occidental Algerian Sahara was studied. The aim of this work was to investigate the follicular growth changes and the steroidogenic associated aspects. The study was performed ...

IGFs regulate gonadotrophin-stimulated proliferation and differentiation of granulosa and theca cells in vitro. However, the detailed pattern of mRNA expression of IGFs in bovine follicles remains controversial. The objectives of this study were therefore to describe the temporal and spatial pattern of expression of mRNA encoding IGF-I, IGF-II and the type 1 IGF receptor in bovine follicles in ...

Follicle and oocyte growth is under the control of systemic gonadotropins and various local intraovarian factors. The present study was undertaken to examine the efficacy of peptide(s) isolated from ovine follicular fluid on preantral and antral follicles, oocytes, cumulus and granulosa cells, and oviductal epithelial cell growth in vitro in a heterologous species (Bubalus bubalis). Follicular ...