We have previously demonstrated that estrogen can exert inhibitory or atretogenic effects on the ovaries of both rats and rhesus monkeys in vivo. This study was designed to test whether the hamster (Mesocricetus auratus) is an appropriate model in which to test the effects of estrogens (diethylstilbestrol and estradiol-17 beta) on steroid accumulation by ovarian granulosa cells in vitro, and whether the effects are similar to those demonstrated for other species in vivo. Immature female hamsters were injected with pregnant mare's serum gonadotropin at 28 to 30 days of age. Animals were sacrificed and follicular contents aspirated three days later. Granulosa cells were either left untreated or treated with diethylstilbestrol or estradiol (1 X 10(-7) M) in vitro for 72 h in the presence of androstenedione (1 X 10(-7) M, and in the presence or absence of serum (10%) or human follicle-stimulating hormone (20 ng/ml), and long-term accumulation of estrogen and progesterone was determined. Diethylstilbestrol inhibited accumulation of estrogen regardless of the presence or absence of follicle-stimulating hormone. In contrast, only estradiol plus follicle-stimulating hormone augmented accumulation of progesterone by granulosa cells. These findings that estrogen can be non-stimulatory or inhibitory to function of granulosa cells in vitro parallel those shown in vivo. Our experimental approach may therefore represent an appropriate model for study of the direct effects of estradiol on the function of granulosa cells.

Download full-text PDF

Source
http://dx.doi.org/10.1007/BF00216480DOI Listing

Publication Analysis

Top Keywords

granulosa cells
24
follicle-stimulating hormone
12
appropriate model
8
cells vitro
8
presence absence
8
accumulation estrogen
8
function granulosa
8
granulosa
6
cells
6
estrogen
5

Similar Publications

Molecular Mechanism of N-Acetylcysteine Regulating Proliferation and Hormone Secretion of Granulosa Cells in Sheep.

Reprod Domest Anim

January 2025

Tianzhu County Animal Husbandry Technology Extension Station, Tianzhu, Gansu, China.

Granulosa cells (GCs) are pivotal in the development of ovarian follicles, serving not only as supportive cells but also as the primary producers of steroid hormones. The proliferation of these cells and the synthesis of steroid hormones are crucial for follicular development and atresia. In our study, GCs were isolated using follicular fluid aspiration and subsequently identified through immunofluorescence.

View Article and Find Full Text PDF

Omega-3 fatty acids supplementation from late pregnancy to early lactation attenuates the endocannabinoid system and immune proteome in preovulatory follicles and endometrium of Holstein dairy cows.

J Dairy Sci

January 2025

Department of Ruminant Science, Institute of Animal Sciences, Agricultural Research Organization, Volcani Institute, Rishon LeZion, Israel. Electronic address:

Activation of the endocannabinoid system (ECS) elicits negative effects on the reproductive system in mammals. Omega-3 (n-3) fatty acid (FA) supplementation lowers ECS activation and has anti-inflammatory effects. Thus, we hypothesized that supplementing cows with n-3 FA will downregulate components of the ECS and immune system in preovulatory follicles and in the endometrium.

View Article and Find Full Text PDF

Granulosa tumors are rare tumors arising from the cells of the sexual cord and stroma of the ovary. They account for 5% of ovarian cancers and 70% of stromal cancers of the sex cords. Retroperitoneal tumors (RPTs) are also rare and develop in the retroperitoneal and subperitoneal space.

View Article and Find Full Text PDF

Purpose: To explore the impact of high body mass index (BMI) on the embryo quality and clinical outcomes of polycystic ovary syndrome (PCOS) patients, and the possible genes involved.

Methods: Patients who underwent in-vitro fertilization (IVF) treatment and embryo transfer in our center from November 2014 to September 2023, were divided into low BMI PCOS (LBP) group, high BMI PCOS (HBP) group, and high BMI control (HBC) group. Transcriptome sequencing was performed in eight PCOS patients' granulosa cells (GCs).

View Article and Find Full Text PDF

SO derivatives impair ovarian function by inhibiting Serpine1/NF-κB pathway-mediated ovarian granulosa cell survival.

J Hazard Mater

January 2025

Centre of Reproductive Medicine, Department of Obstetrics and Gynaecology, Shengjing Hospital of China Medical University, No. 39 Huaxiang Road, Tiexi District, Shenyang, Liaoning 110022, PR China; Key Laboratory of Reproductive Dysfunction Disease and Fertility Remodelling of Liaoning Province, Shenyang, Liaoning 110022, PR China. Electronic address:

Sulfur dioxide (SO) is a contributor to air pollution. Human evidence has demonstrated an association between SO exposure and diminished ovarian reserve. The toxicity of SO is mainly attributed to its derivatives, bisulfite and sulfite, which have a variety of adverse effects on both human health and the environment, yet have been widely used as additives in food processing and transportation.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!