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Identification of a Raloxifene Analog That Promotes AhR-Mediated Apoptosis in Cancer Cells

We previously reported that raloxifene, an estrogen receptor modulator, is also a ligand for the aryl hydrocarbon receptor (AhR). Raloxifene induces apoptosis in estrogen receptor-negative human cancer cells through the AhR. We performed structure–activity studies with seven raloxifene analogs to be...

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Autores principales: Jang, Hyo Sang, Pearce, Martin, O’Donnell, Edmond F., Nguyen, Bach Duc, Truong, Lisa, Mueller, Monica J., Bisson, William H., Kerkvliet, Nancy I., Tanguay, Robert L., Kolluri, Siva Kumar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5745446/
https://www.ncbi.nlm.nih.gov/pubmed/29194351
http://dx.doi.org/10.3390/biology6040041
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author Jang, Hyo Sang
Pearce, Martin
O’Donnell, Edmond F.
Nguyen, Bach Duc
Truong, Lisa
Mueller, Monica J.
Bisson, William H.
Kerkvliet, Nancy I.
Tanguay, Robert L.
Kolluri, Siva Kumar
author_facet Jang, Hyo Sang
Pearce, Martin
O’Donnell, Edmond F.
Nguyen, Bach Duc
Truong, Lisa
Mueller, Monica J.
Bisson, William H.
Kerkvliet, Nancy I.
Tanguay, Robert L.
Kolluri, Siva Kumar
author_sort Jang, Hyo Sang
collection PubMed
description We previously reported that raloxifene, an estrogen receptor modulator, is also a ligand for the aryl hydrocarbon receptor (AhR). Raloxifene induces apoptosis in estrogen receptor-negative human cancer cells through the AhR. We performed structure–activity studies with seven raloxifene analogs to better understand the structural requirements of raloxifene for induction of AhR-mediated transcriptional activity and apoptosis. We identified Y134 as a raloxifene analog that activates AhR-mediated transcriptional activity and induces apoptosis in MDA-MB-231 human triple negative breast cancer cells. Suppression of AhR expression strongly reduced apoptosis induced by Y134, indicating the requirement of AhR for Y134-induced apoptosis. Y134 also induced apoptosis in hepatoma cells without having an effect on cell cycle regulation. Toxicity testing on zebrafish embryos revealed that Y134 has a significantly better safety profile than raloxifene. Our studies also identified an analog of raloxifene that acts as a partial antagonist of the AhR, and is capable of inhibiting AhR agonist-induced transcriptional activity. We conclude that Y134 is a promising raloxifene analog for further optimization as an anti-cancer agent targeting the AhR.
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spelling pubmed-57454462018-01-02 Identification of a Raloxifene Analog That Promotes AhR-Mediated Apoptosis in Cancer Cells Jang, Hyo Sang Pearce, Martin O’Donnell, Edmond F. Nguyen, Bach Duc Truong, Lisa Mueller, Monica J. Bisson, William H. Kerkvliet, Nancy I. Tanguay, Robert L. Kolluri, Siva Kumar Biology (Basel) Communication We previously reported that raloxifene, an estrogen receptor modulator, is also a ligand for the aryl hydrocarbon receptor (AhR). Raloxifene induces apoptosis in estrogen receptor-negative human cancer cells through the AhR. We performed structure–activity studies with seven raloxifene analogs to better understand the structural requirements of raloxifene for induction of AhR-mediated transcriptional activity and apoptosis. We identified Y134 as a raloxifene analog that activates AhR-mediated transcriptional activity and induces apoptosis in MDA-MB-231 human triple negative breast cancer cells. Suppression of AhR expression strongly reduced apoptosis induced by Y134, indicating the requirement of AhR for Y134-induced apoptosis. Y134 also induced apoptosis in hepatoma cells without having an effect on cell cycle regulation. Toxicity testing on zebrafish embryos revealed that Y134 has a significantly better safety profile than raloxifene. Our studies also identified an analog of raloxifene that acts as a partial antagonist of the AhR, and is capable of inhibiting AhR agonist-induced transcriptional activity. We conclude that Y134 is a promising raloxifene analog for further optimization as an anti-cancer agent targeting the AhR. MDPI 2017-12-01 /pmc/articles/PMC5745446/ /pubmed/29194351 http://dx.doi.org/10.3390/biology6040041 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Jang, Hyo Sang
Pearce, Martin
O’Donnell, Edmond F.
Nguyen, Bach Duc
Truong, Lisa
Mueller, Monica J.
Bisson, William H.
Kerkvliet, Nancy I.
Tanguay, Robert L.
Kolluri, Siva Kumar
Identification of a Raloxifene Analog That Promotes AhR-Mediated Apoptosis in Cancer Cells
title Identification of a Raloxifene Analog That Promotes AhR-Mediated Apoptosis in Cancer Cells
title_full Identification of a Raloxifene Analog That Promotes AhR-Mediated Apoptosis in Cancer Cells
title_fullStr Identification of a Raloxifene Analog That Promotes AhR-Mediated Apoptosis in Cancer Cells
title_full_unstemmed Identification of a Raloxifene Analog That Promotes AhR-Mediated Apoptosis in Cancer Cells
title_short Identification of a Raloxifene Analog That Promotes AhR-Mediated Apoptosis in Cancer Cells
title_sort identification of a raloxifene analog that promotes ahr-mediated apoptosis in cancer cells
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5745446/
https://www.ncbi.nlm.nih.gov/pubmed/29194351
http://dx.doi.org/10.3390/biology6040041
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