Chemistry:20α-Dihydroprogesterone

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20α-Dihydroprogesterone
Skeletal formula of 20α-dihydroprogesterone
Ball-and-stick model of the 20α-dihydroprogesterone molecule
Names
IUPAC name
20α-Hydroxypregn-4-en-3-one
Systematic IUPAC name
(1S,3aS,3bS,9aR,9bS,11aS)-1-[(1S)-1-Hydroxyethyl]-9a,11a-dimethyl-1,2,3,3a,3b,4,5,8,9,9a,9b,10,11,11a-tetradecahydro-7H-cyclopenta[a]phenanthren-7-one
Other names
20α-DHP; 20α-Hydroxyprogesterone; 20α-OHP; Pregn-4-en-20α-ol-3-one
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 205-649-5
MeSH 20-alpha-Dihydroprogesterone
UNII
Properties
C21H32O2
Molar mass 316.478 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
Tracking categories (test):

20α-Dihydroprogesterone (20α-DHP), also known as 20α-hydroxyprogesterone (20α-OHP), is a naturally occurring, endogenous progestogen.[1][2][3] It is a metabolite of progesterone, formed by the 20α-hydroxysteroid dehydrogenases (20α-HSDs) AKR1C1, AKR1C2, and AKR1C3 and the 17β-hydroxysteroid dehydrogenase (17β-HSD) HSD17B1.[4][5] 20α-DHP can be transformed back into progesterone by 20α-HSDs and by the 17β-HSD HSD17B2.[6][7] HSD17B2 is expressed in the human endometrium and cervix among other tissues.[8][9][10][7] In animal studies, 20α-DHP has been found to be selectively taken up into and retained in target tissues such as the uterus, brain, and skeletal muscle.[6]

20α-DHP has very low affinity for the progesterone receptor and is much less potent as a progestogen in comparison to progesterone, with about one-fifth of the relative progestogenic activity.[1][2][3][11][12][6][13] It has also been found to act as an aromatase inhibitor and to inhibit the production of estrogen in breast tissue in vitro.[14]

A single 200-mg oral dose of micronized progesterone has been found to result in peak levels of 20α-DHP of around 1 ng/mL after 2 hours.[15] In another study however, peak levels of 20α-DHP were around 10 ng/mL during therapy with 300 mg/day oral micronized progesterone.[16] 20α-DHP is formed from progesterone in the liver and in target tissues such as the endometrium.[16] It appears to be more slowly eliminated than progesterone.[16]

Levels of 5α-DHP have been quantified.[17]

See also

References

  1. ↑ 1.0 1.1 "Progestins as inhibitors of the human 20-ketosteroid reductases, AKR1C1 and AKR1C3". Chem. Biol. Interact. 191 (1–3): 227–33. 2011. doi:10.1016/j.cbi.2010.12.012. PMID 21182831. 
  2. ↑ 2.0 2.1 Tony M. Plant; Anthony J. Zeleznik (15 November 2014). Knobil and Neill's Physiology of Reproduction: Two-Volume Set. Academic Press. pp. 1–. ISBN 978-0-12-397769-4. https://books.google.com/books?id=I1ACBAAAQBAJ&pg=RA1-PA1205. 
  3. ↑ 3.0 3.1 Cynthia L. Darlington (27 April 2009). The Female Brain. CRC Press. pp. 4–. ISBN 978-1-4200-7745-2. https://books.google.com/books?id=2CasCQAAQBAJ&pg=PA4. 
  4. ↑ Marianne J. Legato (29 October 2009). Principles of Gender-Specific Medicine. Academic Press. pp. 617–. ISBN 978-0-08-092150-1. https://books.google.com/books?id=whb9hsUgZtwC&pg=PA617. 
  5. ↑ "Role of aldo-keto reductase family 1 (AKR1) enzymes in human steroid metabolism". Steroids 79: 49–63. January 2014. doi:10.1016/j.steroids.2013.10.012. PMID 24189185. 
  6. ↑ 6.0 6.1 6.2 "Distribution and metabolism of 20 alpha-hydroxylated progestins in the female rat". J. Steroid Biochem. Mol. Biol. 80 (4–5): 469–79. April 2002. doi:10.1016/S0960-0760(02)00039-0. PMID 11983494. 
  7. ↑ 7.0 7.1 Phung, Jason; Paul, Jonathan; Smith, Roger (2020). "Maintenance of Pregnancy and Parturition". Maternal-Fetal and Neonatal Endocrinology. pp. 169–187. doi:10.1016/B978-0-12-814823-5.00013-1. ISBN 9780128148235. 
  8. ↑ "17 beta-Hydroxysteroid dehydrogenase type 2: chromosomal assignment and progestin regulation of gene expression in human endometrium". J. Clin. Invest. 94 (5): 2135–41. November 1994. doi:10.1172/JCI117569. PMID 7962560. 
  9. ↑ Lora Hedrick Ellenson (1 December 2016). Molecular Genetics of Endometrial Carcinoma. Springer. pp. 12–. ISBN 978-3-319-43139-0. https://books.google.com/books?id=wLqiDQAAQBAJ&pg=PA12. 
  10. ↑ "Regulation of progesterone signaling during pregnancy: implications for the use of progestins for the prevention of preterm birth". J. Steroid Biochem. Mol. Biol. 139: 173–81. January 2014. doi:10.1016/j.jsbmb.2013.01.015. PMID 23410596. 
  11. ↑ Bertram G. Katzung (30 November 2017). Basic and Clinical Pharmacology 14th Edition. McGraw-Hill Education. p. 728. ISBN 978-1-259-64116-9. https://books.google.com/books?id=-W5ADwAAQBAJ. "In addition to progesterone, 20α- and 20β-hydroxyprogesterone (20α- and 20β-hydroxy-4-pregnene-3-one) also are found. These compounds have about one-fifth the progestational activity of progesterone in humans and other species." 
  12. ↑ "Steroid-binding specificity of the progesterone receptor from rat placenta". J. Steroid Biochem. 16 (2): 147–50. February 1982. doi:10.1016/0022-4731(82)90160-1. PMID 7078152. 
  13. ↑ "Delta 4-3-Ketopregnene-20 alpha-ol and delta 4-3-ketopregnene-20 beta-ol, two naturally occurring metabolites of progesterone; isolation, identification, biologic activity and concentration in human tissues". J. Clin. Endocrinol. Metab. 18 (4): 337–53. April 1958. doi:10.1210/jcem-18-4-337. PMID 13513735. 
  14. ↑ "The anti-aromatase effect of progesterone and of its natural metabolites 20alpha- and 5alpha-dihydroprogesterone in the MCF-7aro breast cancer cell line". Anticancer Res. 28 (4B): 2129–33. 2008. PMID 18751385. 
  15. ↑ "Oral micronized progesterone. Bioavailability pharmacokinetics, pharmacological and therapeutic implications--a review". Contraception 36 (4): 373–402. October 1987. doi:10.1016/0010-7824(87)90088-6. PMID 3327648. 
  16. ↑ 16.0 16.1 16.2 "Absorption and metabolism of oral progesterone when administered twice daily". Fertil. Steril. 46 (3): 402–7. September 1986. doi:10.1016/S0015-0282(16)49576-2. PMID 3743792. 
  17. ↑ "Reproducibility of an assay to measure serum progesterone metabolites that may be related to breast cancer risk using liquid chromatography-tandem mass spectrometry". Horm Mol Biol Clin Investig 23 (3): 79–84. September 2015. doi:10.1515/hmbci-2015-0026. PMID 26353176. 




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