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Congenital adrenal hyperplasia due to 17α-hydroxylase deficiency is an uncommon form of congenital adrenal hyperplasia (CAH) resulting from a mutation in the gene CYP17A1, which produces the enzyme 17α-hydroxylase. [1] [2] It causes decreased synthesis of cortisol and sex hormones, with resulting increase in mineralocorticoid production.
Mutations in this gene are associated with rare forms of congenital adrenal hyperplasia, specifically 17α-hydroxylase deficiency/17,20-lyase deficiency and isolated 17,20-lyase deficiency. [21] In humans, the CYP17A1 gene is largely associated with endocrine effects and steroid hormone metabolism. [22] [23] [24] Furthermore, mutations in the ...
17β-Hydroxysteroid dehydrogenase III deficiency is a rare autosomal recessive disorder of sexual development condition that is a cause of 46,XY disorder of sex development (46,XY DSD). The impaired testosterone biosynthesis by 17β-hydroxysteroid dehydrogenase III (17β-HSD III), [ 6 ] [ 7 ] presents as atypical genitalia in affected males.
The symptoms of isolated 17,20-lyase deficiency, in males, include pseudohermaphroditism (i.e., feminized, ambiguous, or mildly underdeveloped (e.g., micropenis, perineal hypospadias, and/or cryptorchidism (undescended testes)) external genitalia), female gender identity, and, in non-complete cases of deficiency where partial virilization occurs, gynecomastia up to Tanner stage V (due to low ...
Congenital adrenal hyperplasia due to 11β-hydroxylase deficiency is a form of congenital adrenal hyperplasia (CAH) which produces a higher than normal amount of androgen, [1] resulting from a defect in the gene encoding the enzyme steroid 11β-hydroxylase (11β-OH) which mediates the final step of cortisol synthesis in the adrenal. 11β-OH CAH results in hypertension due to excessive ...
Common symptoms include hypertension, hypokalemia, metabolic alkalosis, and low plasma renin activity. [1] DOC excess syndrome is an excessive secretion of 21-hydroxyprogesterone also called 11-Deoxycorticosterone from adrenal glands and may cause mineralocorticoid hypertension. [4] [5] [6]
glucosyltransferase I deficiency causes ALG6-CDG (CDG-Ic) [22] glucosyltransferase II deficiency causes ALG8-CDG (CDG-Ih). [23] Glc3Man9GlcNAc2-PP-Dol A protein with hitherto unknown activity, MPDU-1, is required for the efficient presentation of Dol-P-Man and Dol-P-Glc. Its deficiency causes MPDU1-CDG (CDG-If). [24]
Signs and symptoms [ edit ] Because of the enormous number of these diseases and the numerous systems negatively impacted, nearly every "presenting complaint" to a healthcare provider may have a congenital metabolic disease as a possible cause, especially in childhood and adolescence.