PMID- 19008128 OWN - NLM STAT- MEDLINE DCOM- 20081229 LR - 20081205 IS - 1532-2165 (Electronic) IS - 1078-5884 (Linking) VI - 37 IP - 1 DP - 2009 Jan TI - Characterisation of Interleukin-8 and monocyte chemoattractant protein-1 expression within the abdominal aortic aneurysm and their association with mural inflammation. PG - 46-55 LID - 10.1016/j.ejvs.2008.09.013 [doi] AB - OBJECTIVES: Abdominal aortic aneurysms (AAAs) are characterised by chronic transmural inflammation. This study investigated the expression of interleukin-8 (IL-8) and monocyte chemoattractant protein-1 (MCP-1) within the AAA, and their relationship with mural inflammation. METHODS: Biopsies were obtained from 25 AAAs, 15 abdominal aortas, and 10 atherosclerotic thoracic aortas. IL-8 and MCP-1 expression was measured in homogenised specimens by ELISA. Infiltrate composition and localised expression of IL-8 and MCP-1 were determined through immunohistochemistry. RESULTS: ELISA analysis demonstrated that IL-8 and MCP-1 were raised in the AAA compared to the controls [(IL-8, AAA vs. abdominal aorta: >28-fold, P<.001; AAA vs. thoracic aorta: >28-fold, P<.001) (MCP-1, AAA vs. abdominal aorta: 9-fold, P<.001; AAA vs. thoracic aorta: 19-fold, P<.001)]. Immunohistochemistry revealed that IL-8 was localised to the inflammatory infiltrate, which consisted predominantly of CD3(+) T- and CD20(+) B-lymphocytes. MCP-1 was predominantly expressed by CD68(+) macrophages. Increasing IL-8 expression was associated with an increase in mural inflammation, and an increase in CD3(+) T-lymphocytes of CD4(+) phenotype within the infiltrate population. CONCLUSION: Pathways involving IL-8 and MCP-1 may be involved in AAA pathogenesis. IL-8 may be directly involved in the chemotaxis of T(H)-lymphocytes into the AAA wall. FAU - Middleton, R K AU - Middleton RK AD - Department of Cardiovascular Sciences, Vascular Surgery Group, University of Leicester, Leicester, UK. rk_middleton@yahoo.co.uk FAU - Bown, M J AU - Bown MJ FAU - Lloyd, G M AU - Lloyd GM FAU - Jones, J L AU - Jones JL FAU - London, N J AU - London NJ FAU - Sayers, R D AU - Sayers RD LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20081112 PL - England TA - Eur J Vasc Endovasc Surg JT - European journal of vascular and endovascular surgery : the official journal of the European Society for Vascular Surgery JID - 9512728 RN - 0 (CCL2 protein, human) RN - 0 (Chemokine CCL2) RN - 0 (Interleukin-8) SB - IM MH - Adult MH - Aged MH - Aortic Aneurysm, Abdominal/*immunology/pathology MH - Chemokine CCL2/*biosynthesis/immunology MH - Female MH - Humans MH - Immunohistochemistry MH - Interleukin-8/*biosynthesis/immunology MH - Lymphocytes/*immunology MH - Male MH - Middle Aged MH - Young Adult EDAT- 2008/11/15 09:00 MHDA- 2008/12/30 09:00 CRDT- 2008/11/15 09:00 PHST- 2008/06/01 00:00 [received] PHST- 2008/09/19 00:00 [accepted] PHST- 2008/11/15 09:00 [pubmed] PHST- 2008/12/30 09:00 [medline] PHST- 2008/11/15 09:00 [entrez] AID - S1078-5884(08)00518-2 [pii] AID - 10.1016/j.ejvs.2008.09.013 [doi] PST - ppublish SO - Eur J Vasc Endovasc Surg. 2009 Jan;37(1):46-55. doi: 10.1016/j.ejvs.2008.09.013. Epub 2008 Nov 12.