Related Experiment Video

Updated: Aug 8, 2026

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells
16:24

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells

Published on: February 21, 2014

Tamoxifen-based probes for the study of estrogen receptor-mediated transcription

J P Trebley1, E L Rickert, P T Reyes

  • 1Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN 47907, USA.

Ernst Schering Research Foundation Workshop
|May 20, 2006
PubMed

Insights

Researchers developed new 4-hydroxytamoxifen analogs to target specific gene expression pathways. These compounds show high affinity for the estrogen receptor and effectively repress its direct transcriptional activity.

Area of Science:

  • Molecular biology
  • Endocrinology
  • Drug discovery

Background:

  • Nuclear receptors, like the estrogen receptor, are key regulators of gene expression.
  • Small molecules offer a precise method for modulating nuclear receptor activity.
  • Targeting specific transcriptional pathways is crucial for developing selective therapeutic agents.

Purpose of the Study:

  • To synthesize and evaluate novel analogs of 4-hydroxytamoxifen.
  • To develop reagents that selectively target specific estrogen receptor-mediated transcriptional regulatory pathways.
  • To identify compounds with high affinity and potent repressive activity.

Main Methods:

  • Synthesis of 4-hydroxytamoxifen analogs with varied side chains.
  • In vitro receptor binding assays to determine compound affinity.
  • Cell-based luciferase reporter gene assays to assess transcriptional activity.

Main Results:

  • All synthesized derivatives demonstrated high binding affinity for the estrogen receptor.
  • The analogs exhibited high potency in repressing direct estrogen receptor-mediated transcription.
  • The modifications in the side chain were well-tolerated and maintained efficacy.

Conclusions:

  • Novel 4-hydroxytamoxifen analogs are effective in targeting estrogen receptor pathways.
  • These compounds represent promising tools for selective modulation of gene expression.
  • Further investigation into these analogs could lead to new therapeutic strategies.

More Related Videos

Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer10:36

Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer

Published on: March 17, 2016

Single Cell Analysis Of Transcriptionally Active Alleles By Single Molecule FISH06:26

Single Cell Analysis Of Transcriptionally Active Alleles By Single Molecule FISH

Published on: September 20, 2020

Related Concept Videos

Transducer Mechanism: Nuclear Receptors01:31

Transducer Mechanism: Nuclear Receptors

Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
Signal Transduction: Overview01:26

Signal Transduction: Overview

Cells respond to many types of information, often through receptor proteins positioned on the membrane. They respond to chemical signals, such as hormones, neurotransmitters, and other signaling molecules, initiating a series of molecular reactions to produce an appropriate response. This is called signal transduction. Cells also coordinate different responses elicited by the same signaling molecule via mediators, allowing molecular cross-talk.
Typically, signal transduction involves three...