Searchable abstracts of presentations at key conferences in endocrinology

ea0041oc10.2 | Reproduction & Endocrine Disruption | ECE2016

Human luteinizing hormone (hLH) and chorionic gonadotropin (hCG) display biased agonism at the LH/CG receptor

Riccetti Laura , Akli Ayoub Mohammed , Klett Daniele , Yvinec Romain , Gallay Nathalie , Combarnous Yves , Casarini Livio , Simoni Manuela , Reiter Eric

Human luteinizing hormone (LH) and human choriogonadotropin (hCG) were considered biologically equivalent for decades due to structural similarities and binding to the same receptor (LHCGR). However, LHCGR triggers differential, LH- and hCG-specific, cAMP production, steroidogenesis, ERK and AKT activation and gene expression in granulosa cells. Besides the Gs/cAMP/PKA pathway, hCG and LH bioactivity on β-arrestin- and Gq/PLC-dependent pathways are yet to be determined. W...

ea0049ep1123 | Female Reproduction | ECE2017

Heterogeneous hCG and hMG commercial preparations result in biased intracellular signaling but induce similar progesterone response in vitro

Riccetti Laura , Klett Daniele , Ayoub Mohammed Akli , Boulo Thomas , Mariot Julie , Pignatti Elisa , Tagliavini Simonetta , Varani Manuela , Tranti Tommaso , Nicoli Alessia , Sala Giovanni Battista La , Combarnous Yves , Reiter Eric , Simoni Manuela , Casarini Livio

Human chorionic gonadotropin (hCG) is the pregnancy hormone marketed as a drug for assisted reproduction technologies to support follicle-stimulating hormone action. Several hCG formulations are commercially available, differing in source, purification methods and biochemical composition. In this study, we investigated the molecular features and the intracellular signaling mediated by five urinary and recombinant hCGs. The drug comparisons were performed by quantifying the hor...