The regulation of reproduction is performed by complex hormonal system: hypothalamus pituitary ovary. There are a lot of ovarian peptides, playing an essential role in the regulation of this hormonal system. However, the mechanisms of their action are not exactly elucidated. Within ovarian peptides, inhibins are seemed to be consider as very important. The term “inhibin” was indicated by McCull...

Source/description: Ovulation rate is an important trait influencing litter size in swine and contributes to reproductive success in pig production. Several quantitative trait loci (QTL) for ovulation rate have been identified in the pig. One region on chromosome 15 was associated with ovulation rate in a Meishan cross and in lines selected for components of litter size. The porcine inhibin a-s...

This study describes the testicular levels of inhibin/activin subunits by Northern analysis and in situ hybridization and serum and testicular levels of inhibins A and B and activin A by enzyme linked immunosorbent assays (ELISA) during postnatal development in the rat. We show that serum inhibin A levels are less than 4 pg/ml throughout postnatal life. Serum inhibin B levels peak at 572 +/- 11...

Activins and inhibins, members of the type beta transforming growth factor superfamily of growth regulatory proteins, are produced in multiple tissues and affect diverse physiologic processes. Using embryonic stem cell technology, we previously demonstrated that inhibin can function as a gonadal tumor suppressor. In this study, we show that development of gonadal tumors is rapidly followed by a...

BACKGROUND Dominant follicle selection is disturbed in normogonadotrophic anovulatory infertility [World Health Organization (WHO) 2] and remaining early antral follicles are either healthy or atretic. This study was conducted to investigate whether inhibin B serum concentrations (produced by healthy small antral follicles) represent the extent of ovarian abnormalities in WHO 2 women and patien...

Background: Polycystic ovary syndrome (PCOS) is one of the main factors leading to infertility and ovulatory dysfunction in women. The aim current research study levels Inhibin A B women with PCOS, depending on level Anti-millerian hormone. Materials methods: 30 infertile (I group) PCOS (excluding hyperprolactenemia, hypothyreosis, autoimmune thyroiditis) healthy (II were involved study. Hormon...

Activin and inhibin are important local modulators of theca cell steroidogenesis in the ovary. Using a serum-free primary theca cell culture system, this study investigated the effects of inhibin on theca cell androgen production and expression of steroidogenic enzymes. Androstenedione secretion from theca cells cultured in media containing activin, inhibin and follistatin was assessed by RIA o...

Inhibins are heterodimeric protein hormones secreted by the granulosa cells of the ovary in the female and the Sertoli cells of the testis in the male. Published research studies have assessed Inhibin B levels in Sertoli cell function, ovarian reserve and granulosa cell tumors. A two-step sandwich-type enzymatic microplate assay to measure Inhibin B levels within 3.5h is reported, and sample pr...

OBJECTIVE The objectives of this study were to investigate the effect of activin A and follistatin on first-trimester cytotrophoblast invasion in culture and to study the secretion of inhibin A, activin A and follistatin by these cells in vitro. DESIGN AND METHODS Cytotrophoblasts were isolated from human placental chorionic villous tissue obtained from 6-8, 8-10 and 10-12 weeks gestation. Ce...

BACKGROUND Activin and inhibin are glycoproteins structurally related to the transforming growth factor-beta superfamily. These peptides were first described as factors that regulate the follicle-stimulating hormone (FSH) at the pituitary level. The possible role of inhibin and activin, at the ovarian level, in mediating the stimulatory actions of a Fundulus pituitary extract (FPE) and 17alpha,...