title: Dynamics of adrenal steroidogenesis in childhood: changes in the excretion of 16-oxygenated- and 11-oxygenated-steroids by 21-hydroxylase deficient children at various ages.
abstract: The close relationship between C19O2 steroid excretion and the ratio of C19O2/C21O5 steroids indicates that it is the elevation of C17,20-lyase activity, which represents the decisive factor in the cessation of androgen-corticoid disproportion during the puberty of healthy children. In 3-6 year-old C21-hydroxylase deficient children treated with corticoids in doses only partially suppressing endogenous ACTH secretion, the excretion of total C19 steroids increased continuously parallel with a well defined elevation of 16 alpha-oxygenated-C21 steroid excretion. The patients did not show the physical signs of adrenarche before six years. This can be attributed to three factors: a) substitutional corticoid therapy; b) intraglandular control of delta 5-pathway by 16 alpha-hydroxylation of C21 steroids; c) neutralisation by 11 beta-hydroxylation of the androgen effect of C19O2 steroids.
mesh_terms: D000293:Adolescent; D000312:Adrenal Hyperplasia, Congenital; D000308:Adrenocortical Hyperfunction / Q000201:enzymology*; D000324:Adrenocorticotropic Hormone / Q000097:blood*; D000367:Age Factors; D000728:Androgens / Q000097:blood; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007664:Ketosteroids / Q000097:blood*; D008297:Male; D011627:Puberty; D013250:Steroid Hydroxylases / Q000172:deficiency*
chemical_list: D000728:Androgens; D007664:Ketosteroids; D000324:Adrenocorticotropic Hormone; D013250:Steroid Hydroxylases