Fragile Fern – Cystopteris fragilis

by | Dec 9, 2023 | Ferns, NE Native Ferns

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27-Hydroxycholesterol (27-HC) is an endogenous oxysterol with multiple biological functions, including activity as a selective estrogen receptor modulator (SERM) (a mixed, tissue-specific agonist-antagonist of the estrogen receptor (ER)) and as an agonist of the liver X receptor (LXR).[1] It is a metabolite of cholesterol that is produced by the enzyme CYP27A1.[1]

A link between high cholesterol and breast cancer has been identified, and it has been proposed that this is due to 27-HC production by CYP27A1.[2] Because of its estrogenic action, 27-HC stimulates the growth of ER-positive breast cancer cells, and has been implicated in limiting the effectiveness of aromatase inhibitors in the treatment of breast cancer.[1] As such, identified CYP27A1 inhibitors, including the marketed drugs anastrozole, fadrozole, bicalutamide, dexmedetomidine, ravuconazole, and posaconazole, have been proposed as potential adjuvant therapies in ER-positive breast cancer.[1]

See also

References

  1. ^ a b c d Mast N, Lin JB, Pikuleva IA (2015). "Marketed Drugs Can Inhibit Cytochrome P450 27A1, a Potential New Target for Breast Cancer Adjuvant Therapy". Mol. Pharmacol. 88 (3): 428–36. doi:10.1124/mol.115.099598. PMC 4551053. PMID 26082378.
  2. ^ Nelson ER, Wardell SE, Jasper JS, Park S, Suchindran S, Howe MK, Carver NJ, Pillai RV, Sullivan PM, Sondhi V, Umetani M, Geradts J, McDonnell DP (2013). "27-Hydroxycholesterol links hypercholesterolemia and breast cancer pathophysiology". Science. 342 (6162): 1094–8. Bibcode:2013Sci...342.1094N. doi:10.1126/science.1241908. PMC 3899689. PMID 24288332.


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