Cortisol Flashcards
Diminishes peripheral uptake (regulatory point in controlling blood glucose) and utilization of glucose; promotes gluconeogenesis in liver metabolism cells; enhances gluconeogenic response to other hormones; promotes lipolysis in adipose tissue
Carbohydrate and lipid metabolism
Increase protein synthesis in liver and decreases protein synthesis (including immunoglobulin synthesis ) in muscle, lymphoid tissue, adipose tissue, skin, and bone; increases plasma level of amino acids; stimulates deamination in liver
protein metabolism
High levels of cortisol used in drug therapy suppress inflammatory response and inhibit proinflammatory activity of many growth factors and cytokines; however, over time some individuals may develop tolerance to glucocorticoids, causing an increased susceptibility to both inflammatory and autoimmune diseases
Anti-inflammatory effects (systemic effects)
Cortisol levels released during stress response may increase proinflammatory effects
Proinflammatory effects (possible local effects)
Lipolysis in extremities and lipogenesis in face and trunk
Lipid metabolism
treatment levels of glucocorticoids are immunosuppressive.
T-cell or innate immune system is particularly affected by these larger doses of glucocorticoids, with suppression of T-helper cell 1 (Th1) function or innate immunity; stress can cause a different pattern of immune response; these nontherapeutic levels can suppress innate (Th1) and increase adaptive (Th2) immunity—the so-called Th2 shift
Immune effects
Promotes gastric secretion
Digestive function
Enhances excretion of calcium
Urinary function
Decreases proliferation of fibroblasts in connective tissue (thus delaying healing)
Connective tissue function
Maintains normal contractility and maximal work output for skeletal and cardiac muscle
Muscle function
Decreases bone formation
Bone function
Maintains normal blood pressure; permits increased responsiveness of arterioles to constrictive action of adrenergic stimulation; optimizes myocardial performance
Vascular system/myocardial function
Somehow modulates perceptual and emotional functioning; essential for normal arousal and initiation of daytime activity
Central nervous system function
May suppress maternal immune system to prevent rejection of fetus
Possible synergism with estrogen in pregnancy?