Related Experiment Video
Updated: Jul 5, 2026
07:09
The Sciatic Nerve Cuffing Model of Neuropathic Pain in Mice
Published on: July 16, 2014
Does COX2-dependent PGE2 play a role in neuropathic pain?
1The Douglas Mental Health University Institute, Montréal, Quebec, Canada H4H 1R3. weiya.ma@douglas.mcgill.ca <weiya.ma@douglas.mcgill.ca>
Neuroscience Letters
|April 25, 2008
Summary
Cyclooxygenase 2-dependent prostaglandin E2 (COX2/PGE2) in injured nerves drives neuropathic pain (NeP) through long-term plasticity. Targeting COX2/PGE2 and its receptors offers a promising therapeutic strategy for chronic NeP.
Area of Science:
- Neuroscience
- Pain Research
- Molecular Biology
Background:
- Neuropathic pain (NeP) is a chronic pain condition with significant unmet medical needs.
- Current NeP therapies are limited due to poorly understood underlying mechanisms.
- Long-term plasticity in pain signaling pathways is increasingly recognized in NeP pathogenesis.
Purpose of the Study:
- To review novel mechanisms of cyclooxygenase 2-dependent prostaglandin E2 (COX2/PGE2) in injured nerves contributing to NeP.
- To explore the role of COX2/PGE2 in inducing long-term plasticity in nociceptors and inflammatory cells.
- To identify COX2/PGE2 and downstream signaling as potential therapeutic targets for NeP.
Main Methods:
- Review of existing literature on NeP, nerve injury, and inflammatory mediators.
- Analysis of the role of COX2/PGE2 in sensitizing nociceptive neurons.
- Examination of COX2/PGE2's autocrine and paracrine effects on inflammatory cells.
Main Results:
- COX2/PGE2 is abundantly produced in injured nerves and implicated in NeP genesis.
- Sustained COX2/PGE2 in injured nerves can induce chronic effects on nociceptors and promote pain-related molecule synthesis.
- COX2/PGE2 influences local inflammatory cells, enhancing inflammatory mediator production.
Conclusions:
- COX2/PGE2 in injured nerves plays a critical role in the development of chronic NeP.
- Targeting COX2/PGE2 and its downstream EP receptor signaling presents a viable therapeutic avenue.
- Further research into these mechanisms could lead to more effective treatments for NeP.
Related Concept Videos
01:44Nociception
Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as piercing pain from a sharp object, heat from an open flame, or contact with corrosive chemicals are first detected by sensory receptors, called nociceptors, located on nerve endings. Nociceptors express ion channels that convert noxious stimuli into electrical signals. When these signals reach the brain via sensory neurons, they are perceived as pain. Thus, pain helps the...
01:25Analgesia and Pain Management
Pain is critical to various clinical pathologies, provoking an urgent need for effective management. Pain, whether acute or chronic, is a complex neurochemical process. Its alleviation depends on the type, with nonopioid analgesics effective for mild to moderate pain, such as musculoskeletal or inflammatory pain, while neuropathic pain responds best to anticonvulsants, tricyclic antidepressants, or serotonin/norepinephrine reuptake inhibitors. For severe acute or chronic pain, opioids may be...
01:20Pain
Pain serves as a critical warning signal that alerts the body to potential or actual harm. When mechanical pressure on the skin is intense, such as from a sharp pinch, the sensation transitions from touch to pain. Similarly, extreme temperatures, like a hot pot handle, convert the sensation of heat into pain. Pain can also result from overstimulation of other senses, such as blinding light, loud noise, or the intense heat from habañero peppers. This ability to sense pain is essential for...
01:20Drugs for Peptic Ulcer Disease: Prostaglandin Analogs as Mucosal Protective Agents
The gastric mucosa produces prostaglandins E2 (PGE2) and prostacyclin (PGI2), crucial in maintaining gastric health. They exert cytoprotective effects, including increasing bicarbonate secretion, releasing protective mucin, reducing gastric acid output, and preventing harmful vasoconstriction. These effects are mediated through various receptors, such as EP1, EP2, EP3, and EP4.
Non-steroidal anti-inflammatory drugs (NSAIDs) can induce peptic ulcers by inhibiting cyclooxygenase, decreasing...
Non-steroidal anti-inflammatory drugs (NSAIDs) can induce peptic ulcers by inhibiting cyclooxygenase, decreasing...
01:24Peptic Ulcer Disease II: Pathophysiology
Peptic ulcer disease develops when protective mechanisms of the gastrointestinal mucosa are overwhelmed by harmful factors, leading to localized erosions in the stomach or proximal duodenum. The main causes are Helicobacter pylori infection and chronic use of nonsteroidal anti-inflammatory drugs (NSAIDs).Helicobacter pylori–Induced InjuryBacterial Adaptation and Colonization:H. pylori is a spiral, Gram-negative bacterium adapted to the acidic stomach. and transmitted through oral-oral or...
01:28Peptic Ulcer Disease II: Pathophysiology
Peptic Ulcer Disease (PUD) is characterized by the development of ulcers in the stomach or duodenal mucosa. Its pathophysiology is complex, involving a balance between damaging and protective elements.
Damaging agents such as Helicobacter pylori, gastric acid, pepsin, and nonsteroidal anti-inflammatory drugs (NSAIDs) can weaken the mucosal defense, allowing hydrogen ions to infiltrate back and harm epithelial cells.
Damaging agents such as Helicobacter pylori, gastric acid, pepsin, and nonsteroidal anti-inflammatory drugs (NSAIDs) can weaken the mucosal defense, allowing hydrogen ions to infiltrate back and harm epithelial cells.