Endocrine Abstracts

Renal and cardio-vascular complications of prematurity are well established, notably those associated with renal tubular immaturity, responsible for major salt loss at birth, as well as early hypertension in adulthood. However, the molecular underlying mechanisms remain poorly understood. Our objective was to investigate the impact of preterm birth on the ontogenesis of renal corticosteroid pathways, to evaluate its implication on perinatal complications and on the emergence o...

Sex differences have been demonstrated in various biological processes such as arterial blood pressure. However, the potential sex dimorphism of the renin-angiotensin-aldosterone system and, by extension, the mineralocorticoid receptor (MR) signaling pathway, major regulators of blood pressure, has only been poorly studied, notably in the kidney. Basal systolic blood pressure (SBP) and heart rate (HR) were measured in adult male and female mice. Renal gene expression studies o...

The 11-beta hydroxysteroid dehydrogenase (11βHSD) isozymes are well-known regulators of glucocorticoid hormone metabolism: 11βHSD2, mostly expressed in the distal nephron, converts cortisol [F] into cortisone [E] in humans or corticosterone into 11-dehydrocorticosterone in rodents (11-dehydro derivatives being inactive compounds), and 11βHSD1, ubiquitously expressed but predominantly in the liver, catalyzes the opposite reaction. Under pathophysiological conditi...