Related Experiment Videos

Peroxisome proliferator-activated receptor gamma and its ligands in controlling interleukin-1beta target gene

M François1, P Richette, M-T Corvol

  • 1Institut National de la Santé et de la Recherche Médicale, Université Paris, Paris, France.

Insights

Peroxisome proliferator-activated receptor gamma (PPARgamma) agonists show anti-inflammatory effects. Further research is needed to understand PPARgamma

Area of Science:

  • Molecular biology
  • Pharmacology
  • Immunology

Background:

  • Peroxisome proliferator-activated receptor gamma (PPARgamma) agonists exhibit anti-inflammatory properties.
  • The precise dependency on PPARgamma and its molecular mechanisms in mediating these effects require further elucidation.
  • Developing subtype-specific agonists/antagonists necessitates a deeper understanding to avoid off-target effects.

Purpose of the Study:

  • To investigate the role of PPARgamma in modulating interleukin-1 target gene expression.
  • To clarify the molecular mechanisms underlying PPARgamma-mediated anti-inflammatory effects.
  • To determine specific PPAR subtype target genes, considering coexpression with other PPAR isotypes.

Main Methods:

  • Analysis of gene expression modulation.
  • Ligand-based studies involving PPARgamma agonists.
  • Investigation of interactions with other transcription factors and PPAR isotypes.

Main Results:

  • Current understanding of how PPARgamma and its ligands modulate interleukin-1 target gene expression.
  • Identification of potential challenges due to coexpression of PPAR isotypes.
  • Evidence suggesting both PPARgamma and PPAR-alpha may possess anti-inflammatory roles.

Conclusions:

  • PPARgamma plays a role in the anti-inflammatory process, but its exact contribution and mechanisms need further study.
  • Distinguishing target genes specific to PPARgamma is critical for therapeutic development.
  • Understanding PPAR isotype interactions is key to designing targeted anti-inflammatory therapies.

Related Concept Videos

TGF - β Signaling Pathway01:16

TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
NF-κB-dependent Signaling Pathway02:26

NF-κB-dependent Signaling Pathway

The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
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:
Co-activators and Co-repressors02:04

Co-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...
Regulation of the Unfolded Protein Response01:31

Regulation of the Unfolded Protein Response

Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...