5th International Conference on Heart and Cardiovascular Diseases

Bandar D. Alrehaili is an Assistant Professor in the Department of Pharmacology and Toxicology at Taibah University, Saudi Arabia. He holds a doctoral degree and has research interests in pharmacology, toxicology, and metabolic processes, with a particular focus on bile acids and their role in regulating lipid metabolism and cellular signaling. His research and academic contributions include the study of cortisol metabolism, a vital aspect of endocrine physiology. His work explores cortisol synthesis and regulation, its role in maintaining metabolic homeostasis, and its effects on glucose, protein, and lipid metabolism. Through his research, he contributes to a deeper understanding of hormonal regulation and its implications for metabolic health and endocrine disorders.

Cortisol is a vital glucocorticoid hormone synthesized by the adrenal cortex. It plays important functions in maintaining metabolic homeostasis and coordinating physiological responses to stress. This chapter provides a comprehensive review of cortisol metabolism, encompassing its synthesis through the hypothalamicpituitary-adrenal (HPA) axis, steroidogenic pathways, and circadian regulation. The complex transport mechanisms involving corticosteroid-binding globulin and albumin ensure appropriate hormone distribution, while the free hormone hypothesis governs tissue accessibility and biological activity.

Cortisol exerts its effects through precise cellular mechanisms involving glucocorticoid receptors, operating via both genomic and non-genomic pathways to regulate gene expression and cellular signaling. The hormone's metabolic effects span glucose homeostasis through gluconeogenesis and glycogen regulation, protein catabolism for amino acid mobilization, and lipolysis with characteristic fat redistribution patterns. These actions are coordinated through complex interactions with insulin and other hormonal systems.

Cortisol clearance occurs primarily through hepatic metabolism and 11β-hydroxysteroid dehydrogenase enzyme systems, which provide tissue-specific modulation of glucocorticoid activity. Clinical implications are profound, with hypercortisolism leading to metabolic syndrome and cardiovascular complications, while hypocortisolism results in life-threatening metabolic instability. Understanding cortisol metabolism is essential for developing targeted therapeutic interventions and optimizing treatment strategies for endocrine disorders while minimizing adverse effects.