{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T00:51:51Z","timestamp":1760057511286,"version":"build-2065373602"},"reference-count":50,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2025,2,11]],"date-time":"2025-02-11T00:00:00Z","timestamp":1739232000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Medizinisch-Wissenschaftlicher Fonds des B\u00fcrgermeisters der Bundeshauptstadt Wien","award":["23032","02-2023"],"award-info":[{"award-number":["23032","02-2023"]}]},{"name":"Austrian Society of Vascular Surgery","award":["23032","02-2023"],"award-info":[{"award-number":["23032","02-2023"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Besides playing a critical role in maintaining cardiovascular homeostasis, the renin\u2013angiotensin\u2013aldosterone system (RAS) has been strongly implicated in (aortic) aneurysm pathogenesis. This study aims to investigate systemic and local levels of angiotensin (Ang) and its metabolites in patients with arterial aneurysms, predominantly abdominal aortic aneurysms, using advanced biochemical profiling techniques to provide new insights into the involvement of RAS in aneurysm genesis. A prospective, single-center study was conducted between October 2023 and July 2024. Serum Ang metabolite levels were measured using RAS Fingerprint technology. Aortic tissue samples were analyzed for local RAS activity, including Ang levels and enzyme activity. Additionally, pre- and postoperative serum samples were obtained in a select group of patients. In total, 37 aneurysm patients and 56 controls were included. Aneurysm patients exhibited higher systemic levels of nearly all Ang metabolites compared to controls, with significant differences in Ang I (p = 0.002), Ang II (p = 0.047), Ang 1\u20135 (p = 0.004), and Renin (p = 0.014) in patients without pharmacological RAS interference. Aneurysm patients receiving ACE inhibitors showed lower serum concentrations in ACE2 activity (p = 0.042) and increased Ang IV levels (p = 0.049) compared to controls. Postoperative measurements indicated different dynamics regarding angiotensin metabolite changes in patients with or without ACE inhibition. This study provides the first comprehensive characterization of RAS profiles in aneurysm patients. These findings add to the body of evidence regarding associations between of RAS and the pathogenesis of arterial aneurysms.<\/jats:p>","DOI":"10.3390\/ijms26041502","type":"journal-article","created":{"date-parts":[[2025,2,11]],"date-time":"2025-02-11T05:34:32Z","timestamp":1739252072000},"page":"1502","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Angiotensin Dysregulation in Patients with Arterial Aneurysms"],"prefix":"10.3390","volume":"26","author":[{"given":"Maria Elisabeth","family":"Leinweber","sequence":"first","affiliation":[{"name":"Department of Vascular and Endovascular Surgery, Clinic Ottakring, 1160 Vienna, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Corinna","family":"Walter","sequence":"additional","affiliation":[{"name":"Department of Vascular and Endovascular Surgery, Clinic Ottakring, 1160 Vienna, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Afshin","family":"Assadian","sequence":"additional","affiliation":[{"name":"Department of Vascular and Endovascular Surgery, Clinic Ottakring, 1160 Vienna, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2289-4837","authenticated-orcid":false,"given":"Chantal","family":"Kopecky","sequence":"additional","affiliation":[{"name":"Clinical Division of Nephrology and Dialysis, Department of Internal Medicine III, Medical University of Vienna, 1090 Vienna, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Oliver","family":"Domenig","sequence":"additional","affiliation":[{"name":"Attoquant Diagnostics, 1110 Vienna, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Johannes Josef","family":"Kovarik","sequence":"additional","affiliation":[{"name":"Clinical Division of Nephrology and Dialysis, Department of Internal Medicine III, Medical University of Vienna, 1090 Vienna, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8264-7796","authenticated-orcid":false,"given":"Amun Georg","family":"Hofmann","sequence":"additional","affiliation":[{"name":"Department of Vascular and Endovascular Surgery, Clinic Ottakring, 1160 Vienna, Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,2,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"579","DOI":"10.1161\/HYPERTENSIONAHA.118.11238","article-title":"Renin-angiotensin system in aortic aneurysm still adding puzzle stones to an anything but complete picture","volume":"72","author":"Bader","year":"2018","journal-title":"Hypertension"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"180","DOI":"10.1016\/j.ejvs.2024.03.034","article-title":"Systematic Review Examining the Association Between Angiotensin Converting Enzyme Inhibitor or Angiotensin Receptor Blocker Prescription and Abdominal Aortic Aneurysm Growth and Events","volume":"68","author":"Tian","year":"2024","journal-title":"Eur. 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