PERK Overexpression-Mediated Nrf2HO-1 Pathway Alleviates HypoxiaReoxygenation-Induced Injury in Neonatal Murine Cardiomyocytes via Improving Endoplasmic Reticulum Stress
Joint Authors
Lu, Li
Wang, Jichun
Chen, Sisi
Xie, Jing
Lu, Shuai
Zhou, Yanli
Jiang, Hong
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-03-26
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Reperfusion processes following acute myocardial infarction (AMI) have been reported to induce additional cardiomyocyte death, known as ischemia-reperfusion (I/R) injury.
Endoplasmic reticulum (ER) stress is reported to be involved in the development of I/R injury.
There is evidence that PERK exerts beneficial roles in alleviating ER stress.
Here, we investigated whether upregulation of PERK improved cardiomyocytes injury induced by I/R.
Specific siRNAs or adenovirus vectors were incubated with isolated neonatal cardiomyocytes (NCMs) to regulate expression levels of target genes including PERK, Nrf2, and HO-1.
Afterwards, hypoxia and subsequent reoxygenation (H/R) administration was performed as the in vitro model of I/R injury.
MTT assay showed that H/R intervention decreased the viability of cells, yet PERK overexpression increased the cellular proliferative rate.
Moreover, the upregulation of Nrf2 or HO-1 elevated the growth rate of cells, while gene silencing of Nrf2 or HO-1 reduced the viability of NCMs treated with PERK-rAAV9.
In addition, we observed that the apoptotic index of cells with H/R stimulation was reduced when NCMs were pretreated with PERK-rAAV9, Nrf2-rAAV9, or HO-1-rAAV9.
After cells were incubated with Nrf2-siRNA or HO-1-siRNA, the upregulation of PERK had no roles in affecting the apoptosis rate of NCMs damaged by H/R.
Then, our findings indicated that there was a level decrease of GRP78, CRT, CHOP, and Caspase-12 in NCMs of the PERK-rAAV9 group compared to that of the H/R group.
Both Nrf2 overexpression and HO-1 upregulation reduced the expression of ER stress-related proapoptotic factors, yet the expression suppression of Nrf2 and HO-1 increased levels of GRP78, CRT, CHOP, and Caspase-12 in NCMs treated with PERK-rAAV9.
Taken together, our results suggested that the effects of PERK against H/R injury might be attributed to the upregulation of Nrf2/HO-1 cascade, followed by the inhibition of ER stress-related apoptotic pathway.
American Psychological Association (APA)
Wang, Jichun& Lu, Li& Chen, Sisi& Xie, Jing& Lu, Shuai& Zhou, Yanli…[et al.]. 2020. PERK Overexpression-Mediated Nrf2HO-1 Pathway Alleviates HypoxiaReoxygenation-Induced Injury in Neonatal Murine Cardiomyocytes via Improving Endoplasmic Reticulum Stress. BioMed Research International،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1135889
Modern Language Association (MLA)
Wang, Jichun…[et al.]. PERK Overexpression-Mediated Nrf2HO-1 Pathway Alleviates HypoxiaReoxygenation-Induced Injury in Neonatal Murine Cardiomyocytes via Improving Endoplasmic Reticulum Stress. BioMed Research International No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1135889
American Medical Association (AMA)
Wang, Jichun& Lu, Li& Chen, Sisi& Xie, Jing& Lu, Shuai& Zhou, Yanli…[et al.]. PERK Overexpression-Mediated Nrf2HO-1 Pathway Alleviates HypoxiaReoxygenation-Induced Injury in Neonatal Murine Cardiomyocytes via Improving Endoplasmic Reticulum Stress. BioMed Research International. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1135889
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1135889