title: Atrial natriuretic factor receptors and stimulation of cyclic GMP formation in normal and malignant osteoblasts.
abstract: Synthetic rat atrial natriuretic factor (Ile-ANF-26) stimulated cyclic GMP formation by up to several hundred-fold in osteoblast-rich cultures from newborn rat calvaria and in clonal osteogenic sarcoma cells (UMR 106-01) which are phenotypically osteoblast. ANF had no effect on the cyclic AMP response to parathyroid hormone in the same cells. Specific, high-affinity binding sites for ANF were identified in both cell types, with Kd and receptor numbers in normal osteoblasts of 1.2 +/- 0.1 X 10(-10) M and 42 +/- 4 X 10(3) per cell, and in UMR 106-01 cells of 1.4 +/- 0.1 X 10(-10) M and 22 +/- 4 X 10(3) per cell.
mesh_terms: D000818:Animals; D009320:Atrial Natriuretic Factor / Q000378:metabolism*; D002116:Calcitonin / Q000494:pharmacology; D015740:Calcitonin Gene-Related Peptide; D000242:Cyclic AMP / Q000096:biosynthesis; D006152:Cyclic GMP / Q000096:biosynthesis*; D006162:Guanylate Cyclase / Q000378:metabolism; D009479:Neuropeptides / Q000494:pharmacology; D010006:Osteoblasts / Q000378:metabolism*; D010281:Parathyroid Hormone / Q000494:pharmacology; D051381:Rats; D017461:Receptors, Atrial Natriuretic Factor; D011956:Receptors, Cell Surface / Q000378:metabolism*
chemical_list: D009479:Neuropeptides; D010281:Parathyroid Hormone; D011956:Receptors, Cell Surface; D009320:Atrial Natriuretic Factor; D002116:Calcitonin; D000242:Cyclic AMP; D006162:Guanylate Cyclase; D017461:Receptors, Atrial Natriuretic Factor; D006152:Cyclic GMP; D015740:Calcitonin Gene-Related Peptide