Cortisone

Cortisone is a pregnene (21-carbon) steroid hormone. It is a naturally-occurring corticosteroid metabolite that is also used as a pharmaceutical prodrug. Cortisol is converted by the action of the enzyme corticosteroid 11-beta-dehydrogenase isozyme 2 into the inactive metabolite cortisone, particularly in the kidneys. This is done by oxidizing the alcohol group at carbon 11 (in the six-membered ring fused to the five-membered ring). Cortisone is converted back to the active steroid cortisol by stereospecific hydrogenation at carbon 11 by the enzyme 11β-Hydroxysteroid dehydrogenase type 1, particularly in the liver.

Not to be confused with cortisol.
Cortisone
Names
Pronunciation /ˈkɔːrtɪsoʊn/, /ˈkɔːrtɪzoʊn/
IUPAC name
17α,21-Dihydroxypregn-4-ene-3,11,20-trione
Systematic IUPAC name
(1R,3aS,3bS,9aR,9bS,11aS)-1-Hydroxy-1-(hydroxyacetyl)-9a,11a-dimethyl-2,3,3a,3b,4,5,8,9,9a,9b,11,11a-dodecahydro-7H-cyclopenta[a]phenanthrene-7,10(1H)-dione
Other names
17α,21-Dihydroxy-11-ketoprogesterone; 17α-Hydroxy-11-dehydrocorticosterone
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.000.149
KEGG
MeSH Cortisone
PubChem CID
UNII
  • InChI=1S/C21H28O5/c1-19-7-5-13(23)9-12(19)3-4-14-15-6-8-21(26,17(25)11-22)20(15,2)10-16(24)18(14)19/h9,14-15,18,22,26H,3-8,10-11H2,1-2H3/t14-,15-,18+,19-,20-,21-/m0/s1 Y
    Key: MFYSYFVPBJMHGN-ZPOLXVRWSA-N Y
  • InChI=1/C21H28O5/c1-19-7-5-13(23)9-12(19)3-4-14-15-6-8-21(26,17(25)11-22)20(15,2)10-16(24)18(14)19/h9,14-15,18,22,26H,3-8,10-11H2,1-2H3/t14-,15-,18+,19-,20-,21-/m0/s1
    Key: MFYSYFVPBJMHGN-ZPOLXVRWBW
SMILES
  • O=C(CO)[C@@]3(O)CC[C@H]2[C@@H]4CC\C1=C\C(=O)CC[C@]1(C)[C@H]4C(=O)C[C@@]23C
Properties
C21H28O5
Molar mass 360.450 g·mol−1
Melting point 220 to 224 °C (428 to 435 °F; 493 to 497 K)
Pharmacology
H02AB10 (WHO) S01BA03 (WHO)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

The term "cortisone" is frequently misused to mean either any corticosteroid or hydrocortisone, which is in fact cortisol. Many who speak of receiving a "cortisone shot" or taking "cortisone" are more likely receiving hydrocortisone or one of many other, much more potent synthetic corticosteroids.

Cortisone can be administered as a prodrug, meaning it has to be converted by the body (specifically the liver, converting it into cortisol) after administration to be effective. It is used to treat a variety of ailments and can be administered intravenously, orally, intra-articularly (into a joint), or transcutaneously. Cortisone suppresses various elements of the immune system, thus reducing inflammation and attendant pain and swelling. Risks exist, in particular in the long-term use of cortisone. However, using cortisone only results in very mild activity, and very often more potent steroids are used instead.

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