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. 2014 Apr 29;2014:640329. doi: 10.1155/2014/640329

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Copyright © 2014 Larissa Pernomian et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Concentration-response curves for angiotensin II in endothelium-intact (E+) or -denuded (E−) carotid rings from control or diabetic rats, over the precontraction induced by phenylephrine (PE). Representative traces from angiotensin II-evoked relaxation in E+ control (a) or diabetic (b) rat carotid. Effect of the in vitro pretreatment with DX600, A779, or PD123,319 in carotid rings from control (c) or diabetic (d) rats. Effect of the in vitro pretreatment with apocynin, tiron, PEG-catalase, or the chronic (in vivo) treatment with angiotensin-(1–7) in carotid rings from control (e) or diabetic (f) rats. Angiotensin II E _max⁡ in carotid arteries from control or diabetic rats before or after the in vitro pretreatment with DX600, A779, PD123,319 (g), apocynin, tiron, or PEG-catalase or the chronic treatment (in vivo) with angiotensin-(1–7) (h). The values are significantly different (P < 0.01; n = 9) from nonpretreated E+ (∗) or E− (∗∗) carotid rings from nontreated control rats, from nonpretreated E+ (#) or E− (##) carotid rings from nontreated diabetic rats, or from PEG-catalase pretreated E+ (†) carotid rings from nontreated control rats.