Searchable abstracts of presentations at key conferences in endocrinology

ea0086p118 | Reproductive Endocrinology | SFEBES2022

Determining the impact of FSH glycosylation variants on the pre-antral follicle transcriptome in the ageing ovary

Johnson Gillian , Bousfield George , Jonas Kim

Ovarian ageing is a naturally occurring physiological process, marked by dynamic changes in ovarian function and hormone secretion. A key of ovarian regulator is follicle stimulating hormone (FSH). FSH is secreted as two glycosylation variants: partially glycosylated FSH (FSH21) and fully glycosylated FSH (FSH24). Analysis has shown that the ratio of FSH21:FSH24 changes with age, with FSH21 predominant during reproductive prime, and FSH24 predominant around menopause. How FSH ...

ea0077oc1.6 | Reproductive and Neuroendocrinology | SFEBES2021

Differential follicle stimulating hormone glycosylation modulates pre-antral follicle growth and survival rates

Johnson Gillian , Onabanjo Caitlan , Bousfield George , Hardy Kate , Jonas Kim

Ovarian ageing is a naturally occurring physiological process, marked by dynamic changes in ovarian function and hormone secretion. A key endocrine regulator of ovarian function is the heterodimeric glycoprotein hormone, follicle stimulating hormone (FSH). FSH is secreted as two glycosylation variants: partially glycosylated FSH (FSH21) and fully glycosylated FSH (FSH24). These variants have different in-vitro activities, with FSH21 more bioactive than FSH24. Interest...

ea0086p121 | Reproductive Endocrinology | SFEBES2022

Tool development for the in vivo analysis of the physiological role of FSHR oligomerisation

Johnson Gillian , Hopkins Thomas , Agwuegbo Uche , Bousfield George , Jonas Kim

G protein-coupled receptors are the largest family of mammalian receptors, with key roles in controlling most physiological processes. Ovarian function is no exception, with a key ovarian GPCR, follicle stimulation hormone receptor (FSHR), and its endogenous ligand, FSH, critical for pre-antral-antral follicle growth and survival. An increasingly important way that GPCRs have been shown to regulate ligand specificity and signal amplitude is via association and formation of dim...

ea0065oc6.2 | Reproductive Endocrinology and Biology | SFEBES2019

Differential follicle stimulating hormone glycosylation modulates follicle growth and survival rates

Johnson Gillian , Bousfield George , Hardy Kate , Jonas Kim

Ovarian aging is a naturally occurring physiological process, marked by dynamic changes in ovarian function and hormone secretion. Ovarian ageing is associated with several co-morbidities, including; osteoporosis, diabetes, cardiovascular disease and impaired cognitive function, therefore, understanding the physiological processes regulating this is imperative for identifying novel treatment modalities. A key endocrine regulatory of ovarian function is the heterodimer glycopro...

ea0094op3.3 | Reproductive Endocrinology | SFEBES2023

Characterisation of a novel N terminally FLAG-tagged FSHR knock in mouse model to understand the physiological roles of FSHR oligomerisation

Hopkins Thomas , Johnson Gillian , Sureshkumar Sumetha , Bousfield George , Jonas Kim

The G protein-coupled receptor (GPCR), follicle stimulating hormone receptor (FSHR) plays a critical role in ovarian function and reproduction, with multiple functions in follicle growth, maturation, survival, and steroid hormone production. Yet how FSH/FSHR mediates these pleiotrophic physiological roles remains unknown. Numerous studies indicate GPCRs can regulate and diversify their actions through receptor-receptor association and the formation of dimers/oligomers. Moreove...