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A study has revealed that serum progesterone concentrations in boys (10 days to 18 years old) with 21-hydroxylase deficiency reached levels up to 10.14 ng/mL, i.e. similar to female luteal values, while in the control group of boys average level was 0.07 ng/mL (0.22 nmol/L), with values ranging from 0.05 to 0.40 ng/mL. [38]
The condition of 21-hydroxylase deficiency is screened by measuring serum levels of 17α-hydroxyprogesterone (17-OHP) in the morning and between day 3 and 5 of the menstrual cycle (for females) to reduce the possibility of false positive results. [12] 17-OHP is used as a marker of the 21-hydroxylase enzyme activity since the 1980s. [52]
Steroid 21-hydroxylase is a protein that in humans is encoded by the CYP21A2 gene. The protein is an enzyme that hydroxylates steroids at the C21 position on the molecule. [ 10 ] [ 11 ] Naming conventions for enzymes are based on the substrate acted upon and the chemical process performed.
21-hydroxylase antibodies Confirmed 0.93-1.4 per 10,000 [72] Autoimmune oophoritis: Ovaries: Anti-ovarian antibodies Probable Rare [73] Autoimmune orchitis: Testes: Anti-sperm antibodies Probable Rare [74] Autoimmune pancreatitis: Pancreas: IgG4, Anti-CA2 antibodies Confirmed 0.82-1.3 per 100,000 [75] Autoimmune polyendocrine syndrome type 1 (APS1)
Autoimmune destruction of the adrenal cortex is caused by an immune reaction against the enzyme 21-hydroxylase (a phenomenon first described in 1992). [20] This may be isolated or in the context of autoimmune polyendocrine syndrome (APS type 1 or 2), in which other hormone-producing organs, such as the thyroid and pancreas, may also be affected ...
21-Deoxycortisol, also known as 11β,17α-dihydroxyprogesterone or as 11β,17α-dihydroxypregn-4-ene-3,20-dione, is a naturally occurring, endogenous steroid related to cortisol (11β,17α,21-trihydroxyprogesterone) which is formed as a metabolite from 17α-hydroxyprogesterone via 11β-hydroxylase.
21-hydroxylase deficiency ... recognizing increases in antigens that are not tolerated because of low levels in the normal state. ... Antibodies against disease ...
It has been known since 1987 that increased levels of 11β-OHP occur in 21-hydroxylase deficiency. [6] [7] A study in 2017 has shown that in subjects with 21-hydroxylase deficiency, serum 11β-OHP concentrations range from 0.012 to 3.37 ng/mL, while in control group it was below detection limit of 0.012 ng/mL.