Parathyroid Drugs and Calcium Homeostasis Flashcards
Primary hormonal regulators of Ca+2 metabolism
Parathormone
Vitamin D
Calcitonin
Secondary hormonal regulators of Ca metabolism
Glucocorticoids
Estrogen
Selective estrogen receptor modulators (raloxifene)
Non hormonal regulators of Ca metabolism
Bisphosphonates (alendronate)
Cinacalcet
Thiazides
Sodium fluoride
Used in hypoparathyroidism as an adjunct to Ca and vit D to reverse hypocalcemia
PTH (84 amino acids)
An anabolic agent stimulating bone formation in treatment of osteoporosis
Teriparatide (a recombinant PTH ) ( 34 amino acids)
Low intermittent subcutaneous administration of this drug for up to 2 years stimulates osteoblastic more than osteoclastic
Teriparatide
Long term exposure to excessive amounts of PTH can stimulate
Bone resorption more than bone formation
Acts on DNA receptor to synthesis protein for Ca transport
Vitamin D
When bone Ca is deficient, it increase ca deposition
Vit D
Used in treatment of
Hypocalcemia
Hypophosphatemia
Vitamin D
Used in treatment of osteoporosis
Vit D
Used in treatment of rickets and osteomalacia
Vit D
It acts on specific reactors on bone and kidney and decrease serum Ca and Po4
Calcitonin
Decrease bone resorption
Decrease calcium absorption
Decrease Ca reabsorption
Calcitonin
Used in treatment of
Hypercalcemia
Hyperprolactinemia
Osteoporosis
Salmon CT
Increase renal Ca excretion
Glucocorticoids
Decrease bone formation
Glucocorticoids
Antagonize intestinal Vit D and stimulated Ca absorption
Glucocorticoids
Used in treatment of hypercalcemia with lymphoma
Glucocorticoids
Used in treatment of postmenopausal osteoporosis
Estrogen
It’s prolonged cause many side effects such as breast and uterus carcinoma
Estrogen
Stimulate estrogen receptors in bones and block them in the breast and uterus (mixed agonist- antagonist)
Selective estrogen receptor modulators ( Raloxifene)
They are slowly released from bone during bone remodeling and the terminal half life appears to be greater than 10 years
Bisphosphonates (alendronate)
Inhibit osteoclastic cell and induce apoptosis of osteoclasts
Bisphosphonates (alendronate)
Used in treatment of osteoporosis
Bisphosphonates ( alendronate)
Used in treatment of hypercalcemia associated with malignancy
Bisphosphonates (alendronate)
Used in treatment of bone lesion associated with bone metastasis
Bisphosphonates (alendronate)
From its side effects
Gastrointestinal distress
Renal impairment
Osteonecrosis of jaw
Bisphosphonates (alendronate)
Works by an agonist activation at the calcium sensing receptors
Decrease secretion of PTH and lowering of serum calcium levels
Cinacalcet
Used in treatment of hyperparathyroidism
Cinacalcet
Used in treatment of hypercalcemia associated with parathyroid cancer
Cinacalcet
Dec renal Ca excretion through inc effect of PTH in stimulating renal Ca reabsorption
Thiazides
Used in prevention of dental caries
Sodium fluoride
Treatment of osteoporosis
Na fluoride
Vit D
Calcitonin
Raloxifene
Bisphosphonates
Causes of hyperglycemia
Hyperparathyroidism
Malignancy
Management of acute hypercalcemia
Slaine diuresis
Hydrocortisone
Bisphosphonates
Hemodialysis
Causes of hypocalcemia
Hypoparathyroidism
Chronic renal failure
Vit D deficiency
Treatment of hypocalcemia
Calcium gluconate
Vit D
Thiazide diuretics
Anti resorptive drugs used in treatment of osteoporosis
Bisphosphonates
Selective estrogen receptor modulators (raloxifene)
Calcitonin
Anabolic drug used in treatment of osteoporosis
Teriparatide
Anabolic anti resorptive drugs used in treatment of osteoporosis
Strontium ranelate