Related Experiment Video
Updated: Apr 29, 2026
09:03
Parallel Interrogation of β-Arrestin2 Recruitment for Ligand Screening on a GPCR-Wide Scale using PRESTO-Tango Assay
Published on: March 10, 2020
11.9K
Biased ligands: pathway validation for novel GPCR therapeutics
David H Rominger1, Conrad L Cowan1, William Gowen-MacDonald1
1Trevena Inc., King of Prussia, PA, USA.
Current Opinion in Pharmacology
|May 20, 2014
Summary
Biased ligands offer new ways to understand and treat diseases by selectively targeting specific signaling pathways of G protein-coupled receptors (GPCRs). This approach promises safer and more effective therapeutics.
Area of Science:
- Pharmacology
- Molecular Biology
- Drug Discovery
Background:
- G protein-coupled receptors (GPCRs) are known to activate multiple signaling pathways.
- Biased ligands selectively modulate these pathways, unlike traditional drugs or endogenous ligands.
- This differential signaling offers opportunities for targeted therapeutic interventions.
Purpose of the Study:
- To review the concept of biased ligands for GPCRs.
- To discuss methods for validating distinct signaling pathways.
- To highlight the therapeutic potential of selective pathway modulation.
Main Methods:
- Literature review of biased ligand research.
- Analysis of pathway validation approaches.
- Case studies illustrating therapeutic applications.
Main Results:
- Biased ligands enable precise control over GPCR signaling.
- Pathway validation confirms the functional relevance of specific signaling routes.
- Selective activation/inhibition by biased ligands shows therapeutic promise.
Conclusions:
- Biased ligands represent a significant advancement in GPCR pharmacology.
- Targeting distinct GPCR pathways can lead to improved drug efficacy and safety.
- Further research into biased ligands and pathway validation is crucial for developing next-generation therapeutics.
Related Concept Videos
01:15G Protein-coupled Receptors
14.1K
G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
14.1K
01:12GPCR Desensitization
6.1K
G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
6.1K
01:09GPCRs Regulate Adenylyl Cylase Activity
6.9K
Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
6.9K
02:40Ligand Binding Sites
11.9K
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
11.9K
02:40Ligand Binding Sites
6.0K
6.0K
01:30Transducer Mechanism: G Protein–Coupled Receptors
9.0K
G Protein–Coupled Receptors (GPCRs) are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to various stimuli. GPCRs regulate critical physiological pathways and are excellent drug targets for treating diseases such as diabetes, cancer, obesity, depression, or Alzheimer's. Nearly 35% of approved drugs implement their therapeutic effects by selectively interacting with specific GPCRs.
GPCRs are also called heptahelical,...
GPCRs are also called heptahelical,...
9.0K