Dexmedetomidine alleviates H2O2-induced oxidative stress and cell necroptosis through activating of α2-adrenoceptor in H9C2 cells

Oxidative stress induced necroptosis is important in myocardial ischemia/reperfusion injury. Dexmedetomidine (Dex), an α2-adrenoceptor (α2-AR) agonist, has protective effect on oxidative stress induced cell apoptosis, but effects of Dex and Dex-mediated α2-AR activation on oxidant induced necroptosi...

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Veröffentlicht in:Molecular biology reports 2020-05, Vol.47 (5), p.3629-3639
Hauptverfasser: Yin, Wenchao, Wang, Chunyan, Peng, Yue, Yuan, Wenlin, Zhang, Zhongjun, Liu, Hong, Xia, Zhengyuan, Ren, Congcai, Qian, Jinqiao
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container_issue 5
container_start_page 3629
container_title Molecular biology reports
container_volume 47
creator Yin, Wenchao
Wang, Chunyan
Peng, Yue
Yuan, Wenlin
Zhang, Zhongjun
Liu, Hong
Xia, Zhengyuan
Ren, Congcai
Qian, Jinqiao
description Oxidative stress induced necroptosis is important in myocardial ischemia/reperfusion injury. Dexmedetomidine (Dex), an α2-adrenoceptor (α2-AR) agonist, has protective effect on oxidative stress induced cell apoptosis, but effects of Dex and Dex-mediated α2-AR activation on oxidant induced necroptosis was unclear. H9C2 cardiomyocytes were pre-treated with or without Dex and α2-AR antagonist yohimbine hydrochloride (YOH) before being exposed to H 2 O 2 to induce oxidative cellular damage. Cell viability and lactate dehydrogenase (LDH) were detected by ELISA kits, protein expressions of Heme Oxygenase 1(HO-1), receptor interacting protein kinase 1 (RIPK1) and receptor interacting protein kinase 3 (RIPK3) were observed by WB, and TUNEL was used to detected cell apoptosis. H 2 O 2 significantly decreased cell viability and increased LDH release and necroptotic and apoptotic cell deaths (all p  
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Dexmedetomidine (Dex), an α2-adrenoceptor (α2-AR) agonist, has protective effect on oxidative stress induced cell apoptosis, but effects of Dex and Dex-mediated α2-AR activation on oxidant induced necroptosis was unclear. H9C2 cardiomyocytes were pre-treated with or without Dex and α2-AR antagonist yohimbine hydrochloride (YOH) before being exposed to H 2 O 2 to induce oxidative cellular damage. Cell viability and lactate dehydrogenase (LDH) were detected by ELISA kits, protein expressions of Heme Oxygenase 1(HO-1), receptor interacting protein kinase 1 (RIPK1) and receptor interacting protein kinase 3 (RIPK3) were observed by WB, and TUNEL was used to detected cell apoptosis. H 2 O 2 significantly decreased cell viability and increased LDH release and necroptotic and apoptotic cell deaths (all p  &lt; 0.05, H 2 O 2 vs. Control). Dex preconditioning alleviated these injuries induced by H 2 O 2 . Dex preconditioning significantly increased expression of protein HO-1 and decreased expressions of proteins RIPK1 and RIPK3 induced by H 2 O 2 , while all these protective effects of Dex were reversed by YOH (all p  &lt; 0.05, Dex + H 2 O 2 vs. H 2 O 2 ; and YOH + Dex + H 2 O 2 vs. Dex + H 2 O 2 ). However, YOH did not prevent this protective effect of Dex against H 2 O 2 induced apoptosis (YOH + Dex + H 2 O 2 vs. Dex + H 2 O 2 , p  &gt; 0.05). 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Dexmedetomidine (Dex), an α2-adrenoceptor (α2-AR) agonist, has protective effect on oxidative stress induced cell apoptosis, but effects of Dex and Dex-mediated α2-AR activation on oxidant induced necroptosis was unclear. H9C2 cardiomyocytes were pre-treated with or without Dex and α2-AR antagonist yohimbine hydrochloride (YOH) before being exposed to H 2 O 2 to induce oxidative cellular damage. Cell viability and lactate dehydrogenase (LDH) were detected by ELISA kits, protein expressions of Heme Oxygenase 1(HO-1), receptor interacting protein kinase 1 (RIPK1) and receptor interacting protein kinase 3 (RIPK3) were observed by WB, and TUNEL was used to detected cell apoptosis. H 2 O 2 significantly decreased cell viability and increased LDH release and necroptotic and apoptotic cell deaths (all p  &lt; 0.05, H 2 O 2 vs. Control). Dex preconditioning alleviated these injuries induced by H 2 O 2 . Dex preconditioning significantly increased expression of protein HO-1 and decreased expressions of proteins RIPK1 and RIPK3 induced by H 2 O 2 , while all these protective effects of Dex were reversed by YOH (all p  &lt; 0.05, Dex + H 2 O 2 vs. H 2 O 2 ; and YOH + Dex + H 2 O 2 vs. Dex + H 2 O 2 ). However, YOH did not prevent this protective effect of Dex against H 2 O 2 induced apoptosis (YOH + Dex + H 2 O 2 vs. Dex + H 2 O 2 , p  &gt; 0.05). 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Dexmedetomidine (Dex), an α2-adrenoceptor (α2-AR) agonist, has protective effect on oxidative stress induced cell apoptosis, but effects of Dex and Dex-mediated α2-AR activation on oxidant induced necroptosis was unclear. H9C2 cardiomyocytes were pre-treated with or without Dex and α2-AR antagonist yohimbine hydrochloride (YOH) before being exposed to H 2 O 2 to induce oxidative cellular damage. Cell viability and lactate dehydrogenase (LDH) were detected by ELISA kits, protein expressions of Heme Oxygenase 1(HO-1), receptor interacting protein kinase 1 (RIPK1) and receptor interacting protein kinase 3 (RIPK3) were observed by WB, and TUNEL was used to detected cell apoptosis. H 2 O 2 significantly decreased cell viability and increased LDH release and necroptotic and apoptotic cell deaths (all p  &lt; 0.05, H 2 O 2 vs. Control). Dex preconditioning alleviated these injuries induced by H 2 O 2 . Dex preconditioning significantly increased expression of protein HO-1 and decreased expressions of proteins RIPK1 and RIPK3 induced by H 2 O 2 , while all these protective effects of Dex were reversed by YOH (all p  &lt; 0.05, Dex + H 2 O 2 vs. H 2 O 2 ; and YOH + Dex + H 2 O 2 vs. Dex + H 2 O 2 ). However, YOH did not prevent this protective effect of Dex against H 2 O 2 induced apoptosis (YOH + Dex + H 2 O 2 vs. Dex + H 2 O 2 , p  &gt; 0.05). These findings indicated that Dex attenuates H 2 O 2 induced cardiomyocyte necroptotic and apoptotic cell death respectively dependently and independently of α2-AR activation.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s11033-020-05456-w</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0003-1441-5971</orcidid><oa>free_for_read</oa></addata></record>
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subjects Adrenergic receptors
Animal Anatomy
Animal Biochemistry
Apoptosis
Biomedical and Life Sciences
Cardiomyocytes
Cell death
Cell viability
Heme
Histology
Hydrogen peroxide
Ischemia
Kinases
L-Lactate dehydrogenase
Lactic acid
Life Sciences
Morphology
Myocardial ischemia
Necroptosis
Original Article
Oxidants
Oxidative stress
Oxygenase
Protein kinase
Proteins
Reperfusion
Yohimbine
title Dexmedetomidine alleviates H2O2-induced oxidative stress and cell necroptosis through activating of α2-adrenoceptor in H9C2 cells
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