Eoxin

Structure of Eoxin A4

Eoxins are a group of bioactive lipid mediators derived from arachidonic acid through the lipoxygenase pathway. They are part of the eicosanoid family, which includes other important molecules such as prostaglandins, thromboxanes, and leukotrienes. Eoxins are primarily produced by eosinophils, mast cells, and certain types of tumor cells.

Biosynthesis

Eoxins are synthesized from arachidonic acid by the action of the enzyme 15-lipoxygenase (15-LOX). The initial step involves the conversion of arachidonic acid to 15-hydroperoxyeicosatetraenoic acid (15-HPETE), which is then further metabolized to produce various eoxins, including Eoxin A4, Eoxin C4, Eoxin D4, and Eoxin E4.

Biological Functions

Eoxins play a significant role in inflammation and are involved in the pathophysiology of several allergic and inflammatory diseases. They are known to contribute to the recruitment and activation of eosinophils and other immune cells at sites of inflammation. Eoxins have been implicated in conditions such as asthma, allergic rhinitis, and certain types of cancer.

Clinical Significance

Due to their role in inflammatory processes, eoxins are considered potential targets for therapeutic intervention in diseases characterized by eosinophilic inflammation. Research is ongoing to develop inhibitors that can block the synthesis or action of eoxins, which may provide new treatment options for patients with asthma and other related conditions.

Related Pages

• Eicosanoid
• Arachidonic acid
• Lipoxygenase
• Eosinophil
• Inflammation