of, relating to, or of the nature of preference: preferential policies. 2. showing or giving preference: a preferential hiring system. 3. receiving or enjoying preference, as a country in trade relations; favored. Origin of preferential.
Histamine dilates post-capillary venules, activates the endothelium, and increases blood vessel permeability. This leads to local edema (swelling), warmth, redness, and the attraction of other inflammatory cells to the site of release. It also depolarizes nerve endings (leading to itching or pain).
To enhance the role of histamine in acute inflammatory reaction. Objective: Histamine is a vasoactive amine that plays an important role in the early acute inflammatory response. This review. enhances the activity of histamine in the acute inflammatory reaction. Background: Histamine is stored in the granules of mast cells, basophils, platelets. This histamine is released from these cells by. the stimuli inducing acute inflammation, anaphylatoxins, and histamine releasing factors. Histamine increases the. vasodilatation, and also increases the vascular permeability in the immediate transient phase of the acute. inflammatory reaction. This act as a chemical mediator in acute inflammation.