Thiophene-core estrogen receptor ligands having superagonist activity.

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Min J, Wang P, Srinivasan S, Nwachukwu JC, Guo P, Huang M, Carlson KE, Katzenellenbogen JA, Nettles KW, Zhou HB

Thiophene-core estrogen receptor ligands having superagonist activity.

J Med Chem. 2013 Apr 25;56(8):3346-66. doi: 10.1021/jm400157e. Epub 2013 Apr 15.

PubMed ID

23586645 [ View in PubMed

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Abstract

To probe the importance of the heterocyclic core of estrogen receptor (ER) ligands, we prepared a series of thiophene-core ligands by Suzuki cross-coupling of aryl boronic acids with bromo-thiophenes and we assessed their receptor binding and cell biological activities. The disposition of the phenol substituents on the thiophene core, at alternate or adjacent sites, and the nature of substituents on these phenols, all contribute to binding affinity and subtype selectivity. Most of the bis(hydroxyphenyl)-thiophenes were ERbeta selective, whereas the tris(hydroxyphenyl)-thiophenes were ERalpha selective; analogous furan-core compounds generally have lower affinity and less selectivity. Some diarylthiophenes show distinct superagonist activity in reporter gene assays, giving maximal activities 2-3 times that of estradiol, and modeling suggests that these ligands have a different interaction with a hydrogen-bonding residue in helix-11. Ligand-core modification may be a new strategy for developing ER ligands whose selectivity is based on having transcriptional activity greater than that of estradiol.

DrugBank Data that Cites this Article

Binding Properties

Drug	Target	Property	Measurement	pH	Temperature (°C)
Estradiol	Estrogen receptor alpha	Kd (nM)	0.2	N/A	N/A	Details
Estradiol	Estrogen receptor beta	Kd (nM)	0.5	N/A	N/A	Details