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The Role of Endothelial Nox2 NADPH Oxidase in Angiotensin II-Induced Hypertension and Dysfunction

This study investigates the impact of endothelial Nox2 NADPH oxidase on hypertension and vasomotor dysfunction induced by angiotensin II. Using Nox2 transgenic and wild-type littermate controls, we assessed body and organ weights, Nox2 protein levels, and NADPH-dependent superoxide production in aortic homogenates. Additionally, mRNA levels of aortic antioxidants post-AngII treatment were evaluated. Our findings contribute valuable insights into the mechanisms linking Nox2 and angiotensin II in hypertension, suggesting potential therapeutic targets.

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The Role of Endothelial Nox2 NADPH Oxidase in Angiotensin II-Induced Hypertension and Dysfunction

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  1. Online Resource Role of endothelial Nox2 NADPH oxidase in angiotensin II-induced hypertension and vasomotor dysfunction. Colin E Murdoch, Sara P Alom-Ruiz, Minshu Wang, Min Zhang, Simon Walker, Bin Yu, Alison Brewer, Ajay M Shah Basic Research in Cardiology King’s College London British Heart Foundation Centre, Cardiovascular Division, London SE5 9PJ, UK. Corresponding author ajay.shah@kcl.ac.uk

  2. Online Resource 1: Comparison of body and organ weight from Nox2Tg and WT littermate controls.

  3. A C B Tg WT Nox2 eNOS Actin actin * Online Resource 2: (A)Nox2 protein levels in aorta from line 2 Nox2 Tg mice (*= P<0.05; t-test; n=4). (B) NADPH-dependent superoxide production assessed by lucigenin-enhanced chemiluminescence in aortic homogenate. Representative bar graph showing reduction in chemiluinescence signal after pre-treatment (15min) with tiron, DPI or apocynin (Apo), whereas pre-treatment with L-NAME, rotenone or, allopurinol (Allo) had no effect on the superoxide production (* p<0.05, **p<0.01; n=6; One-way ANOVA, Bonferroni post-hoc test). (C) Representative blots showing protein expression of eNOS and actin in Wt and Nox2 Tg aorta with the corresponding mean data ( P=NS; n>3).

  4. Online Resource 3: Effect of in vivo angiotensin II treatment on aortic antioxidant mRNA levels. WT and Tg groups were treated with either saline or AngII (1.1mg/kg/day). There were no differences between Wt and Tg in the response to AngII by 2-way ANOVA. Asterisks indicate significant effect (p<0.05) of AngII treatment within Wt or Tg groups. N>3 per group.

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