Related Experiment Video
Updated: Mar 29, 2026

Reverse Yeast Two-hybrid System to Identify Mammalian Nuclear Receptor Residues that Interact with Ligands and/or Antagonists
Published on: November 15, 2013
Brewed Coffee and Its Components Act Through Orphan Nuclear Receptor 4A1 (NR4A1)
Amanuel Hailemariam1, Srijana Upadhyay1, Arafat Rahman Oany1
1Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843, USA.
Brewed coffee and its polyphenols bind to orphan nuclear receptor 4A1 (NR4A1), suggesting NR4A1 mediates coffee's health benefits and role in aging. This research highlights coffee's compounds as NR4A1 ligands.
Area of Science:
- Molecular Biology
- Nutritional Science
- Pharmacology
Background:
- Coffee is a globally consumed beverage linked to reduced mortality and protection against age-related diseases.
- Orphan nuclear receptor 4A1 (NR4A1) is investigated for its potential role in mediating coffee's health effects.
- Polyphenolic and polyhydroxy compounds in coffee are key areas of focus for their biological activity.
Purpose of the Study:
- To investigate the binding of brewed coffee and its major compounds to NR4A1.
- To determine if NR4A1 mediates the effects of coffee compounds on cell growth and gene expression.
- To explore the role of NR4A1 in the health-protective properties associated with coffee consumption.
Main Methods:
- Fluorescent binding assays, surface plasmon resonance, and molecular docking were used to assess compound-NR4A1 interactions.
- NR4A1-responsive Rh30 cancer cells and RAW264.7 macrophages were utilized as cellular models.
- NR4A1-dependent transactivation, cell growth inhibition, gene product modulation, and RNA interference-mediated knockdown of NR4A1 were analyzed.
Main Results:
- Brewed coffee and several polyphenols (e.g., caffeic acid, ferulic acid, chlorogenic acid) demonstrated binding to NR4A1 with Kd values <10 µM.
- Coffee and its polyphenols inhibited Rh30 cell growth, an effect attenuated in NR4A1-deficient cells, indicating NR4A1 dependence.
- Compounds exhibited NR4A1-dependent effects on transactivation and gene expression, acting as inverse NR4A1 agonists, while caffeine and quinic acid showed variable activity.
Conclusions:
- Brewed coffee and its constituents are identified as NR4A1 ligands.
- NR4A1 may play a significant role in mediating the health-protective effects attributed to coffee consumption.
- NR4A1 and its ligands are suggested to be important factors in the relationship between diet and overall health.
More Related Videos
12:30Production of Nurr-1 Specific Polyclonal Antibodies Free of Cross-reactivity Against Its Close Homologs, Nor1 and Nur77
Published on: August 17, 2015
09:11Caffeine Extraction, Enzymatic Activity and Gene Expression of Caffeine Synthase from Plant Cell Suspensions
Published on: October 2, 2018
Related Concept Videos
Transducer Mechanism: Nuclear Receptors
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
Co-activators and Co-repressors
Regulation of Nuclear Protein Sorting
Signal Transduction: Overview
Typically, signal transduction involves three...
The Nucleolus
Nuclear Export
NES are of three types- the canonical 10-residue long leucine-rich signal and other...