Cuaz-Pérolin C, Jguirim I, Larigauderie G, Jlassi A, Furman C, Moreau M, Chapman MJ, Fruchart JC, Slimane MN, Mezdour H, Rouis M. Apolipoprotein E Knockout Mice Over-Expressing Human Tissue Inhibitor of Metalloproteinase 1 Are Protected against Aneurysm Formation but Not against Atherosclerotic Plaque Development.
J Vasc Res 2006;
43:493-501. [PMID:
16931892 DOI:
10.1159/000095309]
[Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2006] [Accepted: 06/13/2006] [Indexed: 11/19/2022] Open
Abstract
AIMS
We investigated the effect of plasma levels of human tissue inhibitor of metalloproteinase (hTIMP)-1 on arterial lesion development and aneurysm formation in apolipoprotein-E-deficient mice (ApoE(-/-)).
METHODS
Control and transgenic mice were fed either a chow diet or a high-fat diet for 90 and 180 days.
RESULTS
hTIMP-1 has a tendency to decrease atherosclerotic lesions, but did not attain significance (approximately 6% reduction in hTIMP-1(+/+), p = 0.075, and approximately 4% in hTIMP-1(+/0), p = 0.088 vs. control). Immunohistological and histological analyses revealed a reduction in macrophage accumulation (23% of control in hTIMP(+/0), p = 0.065, and 49% of control in hTIMP(+/+), p < 0.05) but not in collagen degradation within the lesion in transgenic mice. Moreover, elastin degradation in sites of pseudo-microaneurysms was reduced in transgenic mice (37% of control in hTIMP-1(+/0), p < 0.05, and 50% of control in hTIMP-1(+/+), p < 0.05). DNA array analysis of matrix metalloproteinase (MMP) expression followed by real-time PCR quantification revealed a significant up-regulation of MMP-3, MMP-12 and MMP-13 in arterial lesions of ApoE(-/-) mice fed a high-fat diet in comparison with the same mice fed a chow diet.
CONCLUSION
These data show that hTIMP-1 reduces aneurysm formation in ApoE(-/-) mice but does not protect them against the development of arterial lesions.
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