Gene profiling in atherosclerosis reveals a key role for small inducible cytokines - Validation using a novel monocyte chemoattractant protein monoclonal antibody

被引:85
作者
Lutgens, E
Faber, B
Schapira, K
Evelo, CTA
van Haaften, R
Heeneman, S
Cleutjens, KBJM
Bijnens, AP
Beckers, L
Porter, JG
Mackay, CR
Rennert, P
Bailly, V
Jarpe, M
Dolinski, B
Koteliansky, V
de Fougerolles, T
Daemen, JAP
机构
[1] Univ Maastricht, Dept Pathol, Cardiovasc Res Inst Maastricht, NL-6229 HX Maastricht, Netherlands
[2] Univ Maastricht, Dept Bioinformat, Cardiovasc Res Inst Maastricht, NL-6229 HX Maastricht, Netherlands
[3] Incyte Corp, Palo Alto, CA USA
[4] Garvan Inst Med Res, Arthritis & Inflammat Program, Darlinghurst, NSW, Australia
[5] Biogen Idec Inc, Cambridge, MA USA
关键词
atherosclerosis; genes; inflammation;
D O I
10.1161/CIRCULATIONAHA.104.510073
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background - Pathological aspects of atherosclerosis are well described, but gene profiles during atherosclerotic plaque progression are largely unidentified. Methods and Results - Microarray analysis was performed on mRNA of aortic arches of ApoE (-/-) mice fed normal chow ( NC group) or Western- type diet ( WD group) for 3, 4.5, and 6 months. Of 10 176 reporters, 387 were differentially (> 2X) expressed in at least 1 group compared with a common reference ( ApoE (-/-) , 3- month NC group). The number of differentially expressed genes increased during plaque progression. Time- related expression clustering and functional grouping of differentially expressed genes suggested important functions for genes involved in inflammation ( especially the small inducible cytokines monocyte chemoattractant protein [ MCP]- 1, MCP- 5, macrophage inflammatory protein [ MIP]- 1 alpha MIP- 1 beta , MIP- 2, and fractalkine) and matrix degradation ( cathepsin- S, matrix metalloproteinase- 2/ 12). Validation experiments focused on the gene cluster of small inducible cytokines. Real- time polymerase chain reaction revealed a plaque progression - dependent increase in mRNA levels of MCP- 1, MCP- 5, MIP- 1 alpha, and MIP- 1 beta. ELISA for MCP- 1 and MCP- 5 showed similar results. Immunohistochemistry for MCP- 1, MCP- 5, and MIP- 1 alpha located their expression to plaque macrophages. An inhibiting antibody for MCP- 1 and MCP- 5 ( 11K2) was designed and administered to ApoE (-/-) mice for 12 weeks starting at the age of 5 or 17 weeks. 11K2 treatment reduced plaque area and macrophage and CD45(+) cell content and increased collagen content, thereby inducing a stable plaque phenotype. Conclusions - Gene profiling of atherosclerotic plaque progression in ApoE (-/-) mice revealed upregulation of the gene cluster of small inducible cytokines. Further expression and in vivo validation studies showed that this gene cluster mediates plaque progression and stability.
引用
收藏
页码:3443 / 3452
页数:10
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