Document Detail

Elastase-induced saccular aneurysms in rabbits: a dose-escalation study.
MedLine Citation:
PMID:  11847058     Owner:  NLM     Status:  MEDLINE    
BACKGROUND AND PURPOSE: Reproducible animal models facilitate preclinical assessment of aneurysm therapies. Our purpose was to determine if increased elastase doses enlarge aneurysms and parent arteries. METHODS: Rabbit right common carotid artery (CCA) aneurysms were created with distal ligation and intraluminal elastase incubation. Groups were 1) sham (no elastase, n = 3), 2) 25% elastase (10 minutes, n = 9), 3) 50% elastase (10 minutes, n = 7), and 4) 50% elastase (20 minutes, n = 41). Angiography was performed after 14 days. Resultant aneurysm width and height and parent artery diameters were measured and compared with the Student t or Mann-Whitney (Wilcoxon rank sum) test. RESULTS: Proximal segments were enlarged in all elastase subjects and no sham subjects. Mean measurements were significantly smaller in the sham group than in other groups. Aneurysm widths and heights, respectively, were 3.8 mm +/- 0.8 and 7.4 mm +/- 2.0 in the low-dose group; 3.9 mm +/- 1.3 and 8.5 mm +/- 3.8, medium-dose group; and 4.1 mm +/- 1.1 and 8.7 mm +/- 2.6, high-dose group. Differences were not significant. Parent artery widths were 3.5 mm +/- 0.7, 3.8 mm +/- 0.7, and 4.3 mm +/- 1.4 in the low-, medium-, and high-dose groups, respectively; the high-dose group had larger arteries (P =.07). CONCLUSION: Aneurysms were reliably created and were sized similar to human intracranial aneurysms. Elastase concentration and incubation duration did not affect resultant size. Relatively short incubation (eg, 10 minutes) and 25% elastase can be used to create rabbit aneurysms, especially if dilatation of adjacent parent arteries is to be avoided.
David F Kallmes; Naomi H Fujiwara; Stuart S Berr; Gregory A Helm; Harry J Cloft
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  AJNR. American journal of neuroradiology     Volume:  23     ISSN:  0195-6108     ISO Abbreviation:  AJNR Am J Neuroradiol     Publication Date:  2002 Feb 
Date Detail:
Created Date:  2002-02-15     Completed Date:  2002-03-26     Revised Date:  2008-02-14    
Medline Journal Info:
Nlm Unique ID:  8003708     Medline TA:  AJNR Am J Neuroradiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  295-8     Citation Subset:  IM    
Department of Radiology, University of Virginia Health Services, Charlottesville, VA 22908, USA.
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MeSH Terms
Angiography, Digital Subtraction
Carotid Artery Diseases / chemically induced*,  radiography
Carotid Artery, Common* / drug effects,  radiography
Cerebral Angiography
Disease Models, Animal
Dose-Response Relationship, Drug
Intracranial Aneurysm / chemically induced*,  radiography
Pancreatic Elastase* / administration & dosage,  pharmacology
Reg. No./Substance:
EC Elastase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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