Adrenal and Bone Flashcards
Mineralocorticoids
Aldosterone
regulates sodium and potassium absorption in collecting tubules
Examples of Glucocorticoids
cortisol
prednisone
dexamethasone
Metabolic Effects of Glucocorticoids
stim gluconeogenesis
decrease muscle mass
osteoporosis and decreased growth
Anti-Inflammatory Effects of Glucocorticoids
inhibits PLA2, COX2, IL2, IL3, PAF
Immunosuppressive Effects
inhibit cell mediated response
for organ transplants
Examples of Mineralocorticoids
aldosterone
fludrocortisone
Effects of Mineralocorticoids
increases sodium transfer through sodium channels in collecting ducts of kidney
Excess Mineralocorticoids
metabolic alkalosis
increases hypertension
Deficiencies of Adrenocortical Hormones
increased ACTH and adrenal hyperplasia
Tx for Addison’s Disease
Chronic Adrenal Insufficiency
20-30mg of hydrocortisone QD
supplement with fludrocortisone
Tx for Acute Adrenal Insufficiency
immediate tx of hydrocortisone
100mg IV every 8 hours
Cushing’s Syndrome
from adrenal hyperplasia from tumor
Signs/ Symptoms of Cushing’s Syndrome
rounded, trunk obesity, muscle wasting, purple striae, moon face, osteoporosis
Treatment of Cushing’s Syndrome
remove tumor
300mg hydrocortisone QD on day of surgery, reduced over time
Ketoconazole MOA
inhibits 17a- hydroxylase
blocks synthesis of androgens and cortisol
Use of Ketoconazole
fungal infections
rapid reduction of testosterone levels in prostate cancer treatment