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Frontiers in Cardiovascular Medicine

Frontiers in Cardiovascular Medicine

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Long-Term Effect of a Vaccine Targeting Endothelin-1 Receptor Type A in Pulmonary Arterial Hypertension

Published:17 June 2021 DOI: 10.3389/fcvm.2021.683436 PMID: 34222378
Yong Dai, Zhihua Qiu, Wenrui Ma, Chang Li, Xiao Chen, Xiaoxiao Song, Zeyang Bai, Dingyang Shi, Jiayu Zheng, Guangwei Pan, Yuhua Liao, Mengyang Liao, Zihua Zhou

Abstract

Background: Previously, we invented a therapeutic vaccine targeting the endothelin-A receptor (termed ETRQβ-002). ETRQβ-002 successfully prevented the remodeling of pulmonary arterioles (PAs) and right ventricle (RV) without significant immune-mediated damage in experimental pulmonary arterial hypertension (PAH) mice models. Objective: Here, we aim to further evaluate the long-term effects of ETRQβ-002. Methods: PAH mice model was induced by a combination of subcutaneous injection with Sugen5416 and chronic hypoxic conditions (10% O2). PAH mice were immunized with ETRQβ-002 at different time points, and the experiment lasted for 21 weeks. Hemodynamic, histological, and biochemical analyses were conducted to evaluate the long-term effects of ETRQβ-002. Results: We demonstrated that the titer of the specific antibody against ETR-002 could be maintained chronically after periodic booster immunization in PAH mice. Long-term reduction of right ventricular systolic pressure and amelioration of PA remodeling by ETRQβ-002 were confirmed. Moreover, we found that ETRQβ-002 also exerted antiproliferation, anti-inflammation, and antifibrosis effects in PA remodeling. Besides, ETRQβ-002 durably limited pathological RV hypertrophy and fibrosis. Finally, no immune-mediated damage was observed in hepatic or renal function or by pathology in liver and kidney during the long-term administration of ETRQβ-002. Conclusion: Our findings indicate that ETRQβ-002 provides long-term therapeutic effects in Sugen/hypoxia-induced PAH animals and offers a promising clinical prospect for PAH treatment.

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Materials
Procduct Name CAS Molecular Formula Supplier Price
3-[(2,4-Dimethylpyrrol-5-yl)methylidenyl]-2-indolinon 194413-58-6 C15H14N2O 94 suppliers $10.00-$3564.00
3-[(2,4-Dimethylpyrrol-5-yl)methylidenyl]-2-indolinon 194413-58-6 C15H14N2O 94 suppliers $10.00-$3564.00
3-[(2,4-Dimethylpyrrol-5-yl)methylidenyl]-2-indolinon 194413-58-6 C15H14N2O 94 suppliers $10.00-$3564.00
3-[(2,4-Dimethylpyrrol-5-yl)methylidenyl]-2-indolinon 194413-58-6 C15H14N2O 94 suppliers $10.00-$3564.00

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