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How do prostaglandins contribute to inflammation?
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inflammation
The main function of complement proteins is to aid in the destruction of pathogens by piercing their outer membranes (cell lysis) or by making them more attractive to phagocytic cells such as macrophages (a process known as opsonization). Some complement components also promote inflammation by stimulating cells to release histamine and by attracting phagocytic cells to the site of infection.
Prostaglandins are potent lipid compounds that serve as critical chemical mediators in the inflammatory response. They contribute to inflammation through several key physiological actions:
- Vasodilation: Prostaglandins act locally to relax the muscles in blood vessel walls, causing the vessels to dilate. This increases blood flow to the affected area, which contributes to the characteristic redness (rubor) and heat (calor) of inflammation.12
- Vascular Permeability: They increase the permeability of blood vessels, allowing white blood cells (leukocytes) to escape from the bloodstream into the inflamed tissues. This process also facilitates the swelling (tumor) associated with the inflammatory response.1
- Pain and Fever: Prostaglandins are directly associated with the sensation of pain and the development of fever during inflammation.3
- Synergistic Effects: Some prostaglandins enhance the effects of other substances that promote vascular permeability, further amplifying the inflammatory process.3
Because of their pivotal role in these symptoms, drugs such as aspirin and ibuprofen—known as NSAIDs—are effective at suppressing inflammation by inhibiting the enzymes required for prostaglandin synthesis.123