ACVIM General Boards Practice Test 2026 - Free ACVIM Practice Questions and Comprehensive Study Guide

Leukotriene B4 is recognized as the most potent chemokine in the arachidonic acid cascade due to its significant role in mediating inflammation and directing immune cell traffic. This molecule is produced from arachidonic acid through the action of lipoxygenase enzymes, which convert arachidonic acid into leukotrienes.

Leukotriene B4 specifically acts as a powerful chemoattractant for neutrophils and other immune cells, promoting their migration to sites of inflammation. It enhances the immune response not only by attracting cells but also by activating them, leading to various inflammatory processes. Its potency is particularly evident in its ability to influence the behavior of leukocytes and modulate their responses more effectively than other mediators in the cascade.

In contrast, while other options like Prostaglandin E2 and Thromboxane A2 play critical roles in inflammation and hemostasis, they do not have the same direct and potent chemotactic effect as leukotriene B4. Interleukin-8, although a chemokine, is primarily involved in recruiting neutrophils rather than being a direct product of the arachidonic acid pathway. Hence, leukotriene B4 stands out as the most potent in this