Characterization of Partial Ligation-Induced Carotid AtherosclerosisModel Using Dual-Modality Molecular Imaging in ApoE Knock-out Mice
| Autor: | Dong Kun Lee, Soo Min Shon, Ick Chan Kwon, Jin Yong Park, Dong-Eog Kim, Kwangmeyung Kim, Dawid Schellingerhout, Jeongyeon Kim, Ho-Won Lee, Ik Jae Shin, Byeong-Cheol Ahn, Su Kyoung Lee |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Aortic arch
Apolipoprotein E Carotid Artery Diseases Pathology medicine.medical_specialty lcsh:Medicine Cell Line Superior thyroid artery Mice Apolipoproteins E medicine.artery medicine Atorvastatin Animals Pyrroles Occipital artery Common carotid artery lcsh:Science Ligation Mice Knockout Aorta Multidisciplinary business.industry lcsh:R Molecular Imaging Heptanoic Acids cardiovascular system lcsh:Q business Lithium Chloride Preclinical imaging Research Article |
| Zdroj: | PLOS ONE(8): 9 PLoS ONE PLoS ONE, Vol 8, Iss 9, p e73451 (2013) |
| Popis: | Background Recently, partial ligation of the common carotid artery (CCA) was reported to induce carotid atheromata rapidly in apolipoprotein-E knockout (ApoE(-/-)) mice. We investigated this new atherosclerosis model by using combined matrix-metalloproteinase (MMP) near-infrared fluorescent (NIRF) imaging and macrophage-tracking luciferase imaging. Methodology and principal findings Partial ligation of the left CCA was performed in 10-week-old ApoE(-/-) mice on a high fat diet (n=33); the internal and external carotid arteries and occipital artery were ligated, while the superior thyroid artery was left intact. Two thirds of the animals were treated with either LiCl or atorvastatin. At 1-week, Raw264.7 macrophages modified to express the enhanced firefly-luciferase reporter gene (10(7) Raw-luc cells) were injected intravenously. At 2-week, NIRF molecular imaging visualized strong MMP-2/9 activity in the ligated area of the left CCA as well as in the aortic arch. Left-to-right ratios of the NIRF signal intensities in the CCA had a decreasing gradient from the highest value in the upper-most ligated area to the lowest value in the lower-most region adjacent to the aortic arch. Luciferase imaging showed that most Raw-luc macrophages were recruited to the ligated area of the CCA rather than to the aortic arch, despite similarly strong MMP-2/9-related NIRF signal intensities in both areas. In addition, LiCl or atorvastatin could reduce MMP-2/9 activity in the aortic arch but not in the ligated area of the CCA. Conclusions/significance This is the first molecular imaging study to characterize the partial ligation-induced carotid atherosclerosis model. Molecularly divergent types of atherosclerosis were identified: conventional lipogenic atherosclerosis in the aorta vs. flow-related mechanical atherosclerosis in the partially ligated left system. |
| Databáze: | OpenAIRE |
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