cells cultured under serum-free conditions were treated with human chorionic gonadotropin ( hcg ) or 8-bromo-camp alone or in combination with aminoglutethimide ( to block conversion of cholesterol to steroid hormones ) and 5-cholesten-3 beta , 25-diol ( 25-hydroxycholesterol , a potent suppressor of ldl receptor expression in human fibroblasts ) and pulse-labeled with [ 35s ] methionine .
C0007634
cells
C0016030
fibroblasts