Related Experiment Video
Updated: Jun 21, 2026
16:36
Proteomics to Identify Proteins Interacting with P2X2 Ligand-Gated Cation Channels
Published on: May 18, 2009
P2X receptors and bioactive lipids interact to modulate inflammation.
Vitor Nascimento Vidal1, Thalita Calvet Pereira1, Guilherme Pegas Teixeira1
1Postgraduate Program in Plant Biotechnology and Bioprocesses, Center of Health Sciences, Federal University of Rio de Janeiro, Carlos Chagas Filho Avenue 373, University City, Rio de Janeiro 21941-902, RJ, Brazil; Environmental Health Assessment and Promotion Laboratory, Oswaldo Cruz Institute, Brazil Avenue 4365, Rio de Janeiro 21040-900, RJ, Brazil.
Journal of Lipid Research
|June 19, 2026
Summary
Bioactive lipids regulate P2X receptor expression, influencing inflammatory and pain pathways. Understanding these interactions is key to developing new therapeutic strategies for inflammatory diseases and pain management.
Area of Science:
- Biochemistry
- Molecular Biology
- Immunology
Background:
- P2X receptors are ATP-gated ion channels implicated in inflammation and pain.
- Extracellular ATP release is a key event during inflammation, activating P2X receptors.
- Specific P2X receptor subtypes, like P2X4 and P2X7, play distinct roles in neuropathic pain and inflammasome activation.
Purpose of the Study:
- To elucidate the regulatory role of bioactive lipids on P2X receptor expression.
- To explore the mechanisms by which lipids modulate P2X receptor activity and inflammatory signaling.
- To identify potential therapeutic targets within lipid-P2X receptor interactions for inflammatory diseases.
Main Methods:
- Literature review of studies investigating P2X receptors and bioactive lipids.
- Analysis of signaling pathways involving phospholipase A2, COX enzymes, prostaglandins, and leukotrienes.
- Examination of the influence of anti-inflammatory lipids (resolvins, lipoxins) and structural lipids (cholesterol, ceramides).
Main Results:
- Prostaglandins and other pro-inflammatory lipids increase P2X receptor expression and ATP release.
- P2X7 receptor activation of the NLRP3 inflammasome drives IL-1β release and sustains inflammation.
- Anti-inflammatory lipids attenuate inflammation by reducing ATP release and P2X receptor expression.
- Structural lipids like ceramides influence P2X receptor activity and apoptosis.
Conclusions:
- Bioactive lipids significantly regulate P2X receptor expression and function.
- Lipid mediators are critical in the inflammatory cycle involving P2X receptors.
- Targeting lipid-P2X receptor interactions offers potential for treating inflammatory conditions and pain.
Related Concept Videos
01:28Inflammatory Response
An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
01:26Acute Inflammation I: Inflammatory Response
Acute inflammation is a rapid, short-lived physiological response to tissue injury or infection, designed to eliminate harmful agents and initiate repair. This tightly regulated process typically lasts from minutes to several days and is triggered by factors such as microbial invasion, physical trauma, or chemical injury.Recognition and Mediator ReleaseThe inflammatory response begins when resident immune cells—such as mast cells, macrophages, and dendritic cells—detect damage-associated...
01:25Acute Inflammation III: Local and Systemic Effects
Acute inflammation produces a coordinated set of local and systemic changes that limit injury, eliminate pathogens, and initiate repair. These responses arise within minutes of infection, trauma, or chemical insult and are driven by vascular alterations and leukocyte-derived mediators. When the stimulus resolves, the reaction typically abates within days.Local EffectsAt the site of injury, arteriolar vasodilation increases blood flow, resulting in redness and warmth. Simultaneously, increased...
01:26Acute Inflammation II: Cellular Phase
The cellular phase of acute inflammation is a tightly orchestrated sequence of events that recruits leukocytes, primarily neutrophils, to sites of tissue injury or infection. Following the initial vascular changes, this phase ensures effective immune cell migration, activation, and function at the affected site to eliminate pathogens and initiate tissue repair.Leukocyte Recruitment CascadeLeukocyte recruitment happens in four steps: margination, adhesion, transmigration, and chemotaxis. Reduced...
01:42Phosphoinositides and PIPs
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
01:31Lipid-derived Compounds in the Human Body
Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various biological processes .
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin, delayed...
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin, delayed...