Introduction: Abdominal aortic aneurysm (AAA) is a major challenge in vascular surgery practice due to high morbidity and mortality, especially in case of rupture. Despite open surgery or endovascular stent implantation, no therapeutic option remains to clinicians. Micro-RNAs (miR) have emerged as novel therapeutic targets in the cardiovascular field. For translational research, animal models mimicking human disease are crucial, however, most often a compromise between size, cost and features similar to human disease limits the translational value. Material and Methods: We used the homozygote low-density lipoprotein receptor (LDLR) knockout (KO) Yucatan mini-pig to create a human-relevant animal model for AAA. Local application of porcine pancreatic elastase was applied to the infrarenal aorta for aneurysm inductions. Vascular ultrasound and CT was used for follow-up examination. 8 days after induction, catheter-guided anti-miR-29b coated balloon angioplasty was performed. Animals were sacrificed after 30 days. PCR and immunohistochemistry were used for further characterization of the model. Results: The LDLR KO is hypercholesterolemic and shows severe atherosclerosis in the infrarenal aorta. Aneurysms can be induced by local elastase application for 10 minutes and the aortic diameter increases by 60% over the course of four weeks. Despite atherosclerosis, the aneurysmatic vessel wall shows many features of human disease such as inflammation, extracellular matrix remodeling, angiogenesis and vascular smooth muscle cell phenotype switch. Targeted delivery by balloon angioplasty is feasible and anti-miR-29b penetrates through all layers of the aortic wall, eventually inducing local matrix remodeling. Anti-miR-29b treated animals had significantly smaller AAAs, while not showing any signs of off-target effects. Conclusion: Elastase perfusion in atherosclerosis-prone pigs is a feasible pre-clinical AAA model with many features similar to human disease. Locally balloon-delivered anti-miR-29b induces a pro-fibrotic response, halting aneurysm growth.