Structure Database (LMSD)

Common Name
7-oxocholesterol(d7)
Systematic Name
7-oxo-cholest-5-en-3β-ol(d7)
Synonyms
LM ID
LMST01010005
Formula
C27H37D7O2
Exact Mass
Calculate m/z
407.378069
Status
Curated
Show lipids differing only in stereochemistry/bond geometry

Classification

Category
Main Class
Sub Class
Sterol Lipids [ST]
Sterols [ST01]
Cholesterol and derivatives [ST0101]

Biological Context

7-keto Cholesterol-d7 is intended for use as an internal standard for the quantification of 7-keto cholesterol by GC- or LC-MS. 7-keto Cholesterol is a bioactive sterol and a major oxysterol component of oxidized LDL.1,2 It is produced by oxidation of cholesterol via ethanol-mediated lipid peroxidation or photodamage as well as oxidation of 7-dehydro cholesterol by the cytochrome P450 (CYP) isoform CYP7A1.3,4,5 7-keto Cholesterol inhibits CYP7A1 (IC50 = ~1 μM).4 It induces activation and chemotaxis of retinal microglia as well as polarization to a pro-inflammatory state via NLRP3 inflammasome activation in vitro.6 Intraocular implantation of 7-keto cholesterol-coated wafers increases ocular levels of VEGF, IL-1β, and GRO/KC, macrophage infiltration, and neovascularization in rat eye.7 Levels of 7-keto cholesterol in lipid deposits are increased in a variety of chronic diseases, including atherosclerosis, Alzheimer's disease, and age-related macular degeneration.

This information has been provided by Cayman Chemical

References

1. Brown, A.J., Leong, S.l., Dean, R.T., et al. 7-Hydroperoxycholesterol and its products in oxidized low density lipoprotein and human atherosclerotic plaque. J. Lipid Res. 38, 1730-1745 (1997).
2. Mitic, T., Shave, S., Semjonous, N., et al. 11β-Hydroxysteroid dehydrogenase type 1 contributes to the balance between 7-keto- and 7-hydroxy-oxysterols in vivo. Biochem. Pharmacol. 86(1), 146-153 (2013).
3. Rodriguez, I.R., and Fliesler, S.J. Photodamage generates 7-keto- and 7-hydroxycholesterol in the rat retina via a free radical-mediated mechanism. Photochem. Photobiol. 85(5), 1116-1125 (2009).
4. Shinkyo, R., Xu, L., Tallman, K.A., et al. Conversion of 7-dehydrocholesterol to 7-ketocholesterol is catalyzed by human cytochrome P450 7A1 and occurs by direct oxidation without an epoxide intermediate. The Journal of Biological Chemisty 286(38), 33021-33028 (2011).
5. Shentu, T.P., Titushkin, I., Singh, D.K., et al. oxLDL-induced decrease in lipid order of membrane domains is inversely correlated with endothelial stiffness and network formation. Am. J. Physiol. Cell Physiol. 299(2), C218-C229 (2010).
6. Indaram, M., Ma, W., Zhao, L., et al. 7-Ketocholesterol increases retinal microglial migration, activation, and angiogenicity: A potential pathogenic mechanism underlying age-related macular degeneration. Sci. Rep. 5:9144, (2015).
7. Amaral, J., Lee, J.W., Chou, J., et al. 7-Ketocholesterol induces inflammation and angiogenesis in vivo: A novel rat model. PLoS One 8(2), e56099 (2013).

References

Comments
Synthetic deuterated standard

Taxonomy Information

Curated from
NCBI taxonomy class
Reference
synthetic construct (#32630)
Synthetic deuterated standard

String Representations

InChiKey (Click to copy)
YIKKMWSQVKJCOP-KVZGVLACSA-N
InChi (Click to copy)
InChI=1S/C27H44O2/c1-17(2)7-6-8-18(3)21-9-10-22-25-23(12-14-27(21,22)5)26(4)13-11-20(28)15-19(26)16-24(25)29/h16-18,20-23,25,28H,6-15H2,1-5H3/t18-,20+,21-,22+,23+,25+,26+,27-/m1/s1/i1D3,2D3,17D
SMILES (Click to copy)
[C@]12(C(=O)C=C3C[C@@H](O)CC[C@]3(C)[C@@]1([H])CC[C@]1(C)[C@@]([H])([C@@](C)([H])CCCC(C([2H])([2H])[2H])(C([2H])([2H])[2H])[2H])CC[C@@]21[H])[H]

Other Databases

HMDB ID
HMDB00501
PubChem CID
3247054
Cayman ID
25972

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Created at
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Updated at
29th Jan 2021