Abdominal Aortic Aneurysm Research Today is a free monthly online journal that collates and summarizes the latest research about Abdominal Aortic Aneurysm, including details on aaa (abdominal aortic aneurism), cardiac disease, treatment, symptoms, surgery.

Smoking promotes pathogenesis of aortic aneurysm through the 5-lipoxygenase pathway.

Takagi H, Umemoto T

Department of Cardiovascular Surgery, Sizuoka Medical Center, 762-1 Nagasawa, Shimizu-cho, Sunto-gun, Shizuoka 411-8611, Japan. kfgth973@ybb.ne.jp

Smoking has been known as a risk factor for aortic aneurysm. 5-Lipoxygenase is the key enzyme in leukotriene biosynthesis and catalyzes initial steps in the conversion of arachidonic acid to these biologically active lipid mediators, which are known to exert proinflammatory effects in vivo. Smoking can induce 5-lipoxygenase expression in colon neoplasm, and may activate the 5-lipoxygenase pathway also in aortic tissue. 5-Lipoxygenase has a role in promoting the formation of aneurysms through potential plasma macrophage inflammatory protein-1alpha and -2 chemokine-dependent inflammatory circuits involving both myeloid and endothelial cells. Therefore, smoking may promote pathogenesis of aortic aneurysm through the 5-lipoxygenase pathway.

Published 12 April 2005 in Med Hypotheses, 64(6): 1117-9.
Full-text of this article is available online (may require subscription).

© 2004-2008 Abdominal Aortic Aneurysm Research Today. All Rights Reserved.