Related Experiment Video
Updated: May 17, 2026
08:35
Inducible and Reversible Dominant-negative (DN) Protein Inhibition
Published on: January 7, 2019
Dominant-negative and knockdown approaches to studying PPAR activity.
Sudhir Singh1, Robert G Bennett
1VA Nebraska and Western Iowa Health Care System, Omaha, NE, USA.
Methods in Molecular Biology (Clifton, N.J.)
|October 27, 2012
Summary
Researchers explored new ways to study Peroxisome proliferator-activated receptors (PPARs) by targeting PPAR gamma (PPARγ). This study introduces molecular biology strategies as alternatives to chemical inhibitors for understanding PPAR cellular effects.
Area of Science:
- Molecular biology
- Cellular biology
- Biochemistry
Background:
- Peroxisome proliferator-activated receptors (PPARs) play crucial roles in cellular functions.
- Understanding PPARs' cellular effects is vital, but chemical inhibitors have limitations like toxicity and nonspecific interactions.
- Alternative methods are needed to precisely control PPAR activity for research.
Purpose of the Study:
- To investigate novel molecular biology strategies for targeting PPAR gamma (PPARγ) activity.
- To provide alternative methods for studying PPARγ cellular functions beyond traditional chemical inhibitors.
Main Methods:
- Development of dominant-negative constructs to inhibit PPARγ.
- Utilizing siRNA-mediated knockdown to reduce PPARγ gene expression.
- Evaluating the efficacy of these molecular tools in cellular models.
Main Results:
- Successfully designed and implemented dominant-negative constructs targeting PPARγ.
- Demonstrated effective PPARγ knockdown using siRNA strategies.
- Established molecular tools for precise manipulation of PPARγ activity.
Conclusions:
- Dominant-negative and siRNA approaches offer viable alternatives for targeting PPARγ.
- These molecular strategies enable more specific investigation of PPARγ's cellular roles.
- The described methods advance research into PPARγ function and its therapeutic potential.
Related Concept Videos
01:31Transducer 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:
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
02:04Co-activators and Co-repressors
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
01:29The Two-State Receptor Model
The two-state receptor model explains a drug's interaction with receptors, such as G protein-coupled receptors and ligand-gated ion channels, to induce or inhibit a biological response. When no natural ligands are present, a receptor exists in an equilibrium of inactive (Ri) and active (Ra) conformations. The inactive form does not produce a response, while the active form generates a basal effect known as constitutive activity.
The binding affinity of a drug determines its interaction with one...
The binding affinity of a drug determines its interaction with one...
02:15Experimental RNAi
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
01:16In-vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.