Effect of uremic sera on parathyroid hormone (PTH) mediated release of calcium from normal rat embryonal bone maintained in tissue culture.
1. 45Ca released from embryonal fetal rat bone into a tissue culture system containing uremic serum was lower than 45Ca measured in culture media containing normal sera. 2. With stimulation of bone calcium mobilization by the addition of PTH, 1,25(OH)2D3, 24,25(OH)2D3 and 25 (OH)2D3, the 45Ca released into media containing uremic serum was significantly lower than measured in cultures containing normal serum. 3. Addition of PTH in combination with 24,25(OH)2D3 or with 24,25(OH)2D3 and 1,25(OH)2D3 to bone cultures containing uremic serum increased the 45Ca released into the media when compared to cultures containing uremic serum and PTH.
D000818:Animals; D001862:Bone Resorption; D001842:Bone and Bones / Q000196:embryology / Q000378:metabolism*; D002118:Calcium / Q000378:metabolism*; D046508:Culture Techniques; D005260:Female; D010281:Parathyroid Hormone / Q000502:physiology*; D011247:Pregnancy; D051381:Rats; D014511:Uremia / Q000097:blood*
D010281:Parathyroid Hormone; D002118:Calcium