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      1. Author :
        Goergen, C.J.; Azuma, J.; Barr, K.N.; Magdefessel, L.; Kallop, D.Y.; Gogineni, A.; Grewall, A.; Weimer, R.M.; Connolly, A.J.; Dalman, R.L.; Taylor, C.A.; Tsao, P.S.; Greve, J.M.
      2. Title :
      3. Type :
        Journal Article
      4. Year :
        2011
      5. Publication :
        Arteriosclerosis, Thrombosis, and Vascular Biology
      6. Products :
      7. Volume :
        31
      8. Issue :
        2
      9. Page Numbers :
        N/A
      10. Research Area :
        N/A
      11. Keywords :
        Aaa; abdominal aortic aneurysm; FX Pro Kodak molecular Imaging System; ImageJ software; in vivo imaging; jugular vein injection; mice; MMPSense 680; ProSense 750; tail vein injection; thoracic aorta; vascular
      12. Abstract :
        <AbstractText Label=“OBJECTIVE” NlmCategory=“OBJECTIVE”>To quantitatively compare aortic curvature and motion with resulting aneurysm location, direction of expansion, and pathophysiological features in experimental abdominal aortic aneurysms (AAAs).</AbstractText> <AbstractText Label=“METHODS AND RESULTS” NlmCategory=“RESULTS”>MRI was performed at 4.7 T with the following parameters: (1) 3D acquisition for vessel geometry and (2) 2D cardiac-gated acquisition to quantify luminal motion. Male 24-week-old mice were imaged before and after AAA formation induced by angiotensin II (AngII)-filled osmotic pump implantation or infusion of elastase. AngII-induced AAAs formed near the location of maximum abdominal aortic curvature, and the leftward direction of expansion was correlated with the direction of suprarenal aortic motion. Elastase-induced AAAs formed in a region of low vessel curvature and had no repeatable direction of expansion. AngII significantly increased mean blood pressure (22.7 mm Hg, P<0.05), whereas both models showed a significant 2-fold decrease in aortic cyclic strain (P<0.05). Differences in patterns of elastin degradation and localization of fluorescent signal from protease-activated probes were also observed.</AbstractText> <AbstractText Label=“CONCLUSIONS” NlmCategory=“CONCLUSIONS”>The direction of AngII aneurysm expansion correlated with the direction of motion, medial elastin dissection, and adventitial remodeling. Anterior infrarenal aortic motion correlated with medial elastin degradation in elastase-induced aneurysms. Results from both models suggest a relationship between aneurysm pathological features and aortic geometry and motion.</AbstractText>
      13. URL :
        http://www.ncbi.nlm.nih.gov/pubmed/21071686
      14. Call Number :
        PKI @ user @ 8450
      15. Serial :
        4803