Resveratrol inhibits growth of experimental abdominal aortic aneurysm associated with upregulation of angiotensin-converting enzyme 2

Moran, Corey S., Biros, Erik, Krishna, Smriti M., Wang, Yutang, Tikellis, Chris, Moxon, Joseph V., Cooper, Mark E., Norman, Paul E., Burrell, Louise M., Thomas, Merlin C., and Golledge, Jonathan (2017) Resveratrol inhibits growth of experimental abdominal aortic aneurysm associated with upregulation of angiotensin-converting enzyme 2. Arteriosclerosis Thrombosis and Vascular Biology, 37 (11). pp. 2195-2218.

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Objective: Recent evidence suggests an important role for angiotensin-converting enzyme 2 (ACE2) in limiting abdominal aortic aneurysm (AAA). This study examined the effect of ACE2 deficiency on AAA development and the efficacy of resveratrol to upregulate ACE2 in experimental AAA.

Approach and Results: Ace2 deletion in apolipoprotein-deficient mice (ApoE(-/-)Ace2(-/y)) resulted in increased aortic diameter and spontaneous aneurysm of the suprarenal aorta associated with increased expression of inflammation and proteolytic enzyme markers. In humans, serum ACE2 activity was negatively associated with AAA diagnosis. ACE2 expression was lower in infrarenal biopsies of patients with AAA than organ donors. AAA was more severe in ApoE (-/-)Ace2(-/y) mice compared with controls in 2 experimental models. Resveratrol (0.05/100-g chow) inhibited growth of pre-established AAAs in ApoE(-/-) mice fed high-fat chow and infused with angiotensin II continuously for 56 days. Reduced suprarenal aorta dilatation in mice receiving resveratrol was associated with elevated serum ACE2 and increased suprarenal aorta tissue levels of ACE2 and sirtuin 1 activity. In addition, the relative phosphorylation of Akt and ERK (extracellular signal-regulated kinase) 1/2 within suprarenal aorta tissue and gene expression for nuclear factor of kappa light polypeptide gene enhancer in B cells 1, angiotensin type-1 receptor, and metallopeptidase 2 and 9 were significantly reduced. Upregulation of ACE2 in human aortic smooth muscle cells by resveratrol in vitro was sirtuin 1-dependent.

Conclusions: This study provides experimental evidence of an important role for ACE2 in limiting AAA development and growth. Resveratrol upregulated ACE2 and inhibited AAA growth in a mouse model.

Item ID: 51766
Item Type: Article (Research - C1)
ISSN: 1079-5642
Keywords: abdominal aortic aneurysm, angiotensin II, animal model cardiovascular disease, humans, mice
Funders: National Health and Medical Research Council (NHMRC), Office of Health and Medical Research, Townsville Hospital Private Practice Trust, Queensland Government
Projects and Grants: NHMRC grant 1079193, NHMRC grant 1079369, NHMRC grant 1098717, NHMRC Practioner Fellowship 1117061
Date Deposited: 13 Dec 2017 07:38
FoR Codes: 32 BIOMEDICAL AND CLINICAL SCIENCES > 3201 Cardiovascular medicine and haematology > 320199 Cardiovascular medicine and haematology not elsewhere classified @ 100%
SEO Codes: 92 HEALTH > 9299 Other Health > 929999 Health not elsewhere classified @ 100%
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