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Pathway Description
Corticosterone Methyl Oxidase I Deficiency (CMO I)
Homo sapiens
Disease Pathway
Corticosterone methyloxidase type I (CMO-I) deficiency, also known as 18-hydroxylase deficiency or aldosterone deficiency among other names, is a genetic disorder that is autosomally linked and caused by a defective CYP11B2 gene. This gene encodes the cytochrome P450 11B2 mitochondrial protein, also called aldosterone synthase, which is used to catalyze the conversion of 18-hydroxycorticosterone to aldosterone. This leads to a decrease in the amount of aldosterone present in the cells, which is responsible for an increased amount of salt excreted in the urine, known as salt wasting. In CMO-I deficiency, aldosterone levels are so low that they are undetectable in plasma.
References
Corticosterone Methyl Oxidase I Deficiency (CMO I) References
[Metagen: CORTICOSTERONE METHYL OXIDASE I DEFICIENCY- CMO I](http://metagene.de/program/d.prg?id_d=486)
[OMIM: 203400](http://omim.org/entry/203400})
Geley S, Johrer K, Peter M, Denner K, Bernhardt R, Sippell WG, Kofler R: Amino acid substitution R384P in aldosterone synthase causes corticosterone methyloxidase type I deficiency. J Clin Endocrinol Metab. 1995 Feb;80(2):424-9. doi: 10.1210/jcem.80.2.7852500.
Pubmed: 7852500
Ustyol A, Atabek ME, Taylor N, Yeung MC, Chan AO: Corticosterone Methyl Oxidase Deficiency Type 1 with Normokalemia in an Infant. J Clin Res Pediatr Endocrinol. 2016 Sep 1;8(3):356-9. doi: 10.4274/jcrpe.2824. Epub 2016 Apr 29.
Pubmed: 27125267
Steroidogenesis References
Lehninger, A.L. Lehninger principles of biochemistry (4th ed.) (2005). New York: W.H Freeman.
Norman, A.W, and Litwack, G. Hormones (2nd ed.) (1997) San Diego : Academic Press.
Salway, J.G. Metabolism at a glance (3rd ed.) (2004). Alden, Mass.: Blackwell Pub.
Vance, D.E., and Vance, J.E. Biochemistry of lipids, lipoproteins, and membranes (4th ed.) (2002) Amsterdam; Boston: Elsevier.
Miller WL: Molecular biology of steroid hormone synthesis. Endocr Rev. 1988 Aug;9(3):295-318. doi: 10.1210/edrv-9-3-295.
Pubmed: 3061784
HECHTER O, SOLOMON MM, ZAFFARONI A, PINCUS G: Transformation of cholesterol and acetate to adrenal cortical hormones. Arch Biochem Biophys. 1953 Sep;46(1):201-14. doi: 10.1016/0003-9861(53)90182-9.
Pubmed: 13092959
Luu-The V: Assessment of steroidogenesis and steroidogenic enzyme functions. J Steroid Biochem Mol Biol. 2013 Sep;137:176-82. doi: 10.1016/j.jsbmb.2013.05.017. Epub 2013 Jun 13.
Pubmed: 23770321
George FW, Russell DW, Wilson JD: Feed-forward control of prostate growth: dihydrotestosterone induces expression of its own biosynthetic enzyme, steroid 5 alpha-reductase. Proc Natl Acad Sci U S A. 1991 Sep 15;88(18):8044-7. doi: 10.1073/pnas.88.18.8044.
Pubmed: 1654556
Andersson S, Berman DM, Jenkins EP, Russell DW: Deletion of steroid 5 alpha-reductase 2 gene in male pseudohermaphroditism. Nature. 1991 Nov 14;354(6349):159-61. doi: 10.1038/354159a0.
Pubmed: 1944596
Emanuelsson I, Almokhtar M, Wikvall K, Gronbladh A, Nylander E, Svensson AL, Fex Svenningsen A, Norlin M: Expression and regulation of CYP17A1 and 3beta-hydroxysteroid dehydrogenase in cells of the nervous system: Potential effects of vitamin D on brain steroidogenesis. Neurochem Int. 2018 Feb;113:46-55. doi: 10.1016/j.neuint.2017.11.007. Epub 2017 Nov 21.
Pubmed: 29162485
Kimoto T, Asou H, Ohta Y, Mukai H, Chernogolov AA, Kawato S: Digital fluorescence imaging of elementary steps of neurosteroid synthesis in rat brain glial cells. J Pharm Biomed Anal. 1997 Jun;15(9-10):1231-40.
Pubmed: 9226548
Verschoor-Klootwyk AH, Verschoor L, Azhar S, Reaven GM: Role of exogenous cholesterol in regulation of adrenal steroidogenesis in the rat. J Biol Chem. 1982 Jul 10;257(13):7666-71.
Pubmed: 6282849
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