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YTHDF2 Promotes Cardiac Ferroptosis via Degradation of SLC7A11 in Cardiac Ischemia–reperfusion Injury

ABSTRACT: YTHDF2 Promotes Cardiac Ferroptosis via Degradation of SLC7A11 in Cardiac Ischemia–reperfusion Injury

PROVIDER: PRJNA992084 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25179740_1.fastq.gz	Fastqsanger.gz
	SRR25179740_2.fastq.gz	Fastqsanger.gz
	SRR25179741_1.fastq.gz	Fastqsanger.gz
	SRR25179741_2.fastq.gz	Fastqsanger.gz
	SRR25179742_1.fastq.gz	Fastqsanger.gz

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YTHDF2 Promotes Cardiac Ferroptosis via Degradation of SLC7A11 in Cardiac Ischemia–reperfusion Injury

Project description:Aims: Myocardial ischemia–reperfusion (I/R) injury severely facilitates cardiomyocyte death and endangers human health. RNA N6-methyladenosine (m6A) methylation modification plays a critical role in cardiovascular diseases. M6A reader YTHDF2 could identify m6a-modified RNA and promote target RNA degradation. Hence, we hypothesized that YTHDF2 impacts I/R injury by regulating RNA stability, in turn revealing the potential regulatory mechanism. Results: Both the mRNA and protein levels of YTHDF2 were upregulated in I/R mice and hypoxia-reoxygenation (H/R)-induced cardiomyocytes. Silencing endogenous YTHDF2 abrogated cardiac dysfunction and lowered infarct size in I/R mice, and forced expression of YTHDF2 aggravated the above-mentioned adverse pathological process. Consistently, the protective effect of silencing YTHDF2 reappeared in cardiomyocytes induced by H/R and erastin. Furthermore, RNA-seq and RIP revealed that YTHDF2 could recognize the m6A modification sites of ferroptosis-related gene SLC7A11 mRNA to promote its degradation both in vivo and in vitro. Inhibition of SLC7A11 also aggravated cardiac function, infarct size and the release of LDH in I/R mice after silencing YTHDF2. The advantageous effect of si-YTHDF2 in H/R injury was reversed by cotransfection with si-SLC7A11, which substantially exacerbated ferroptosis and the production of ROS. Innovation and Conclusion: All of the obtained data demonstrate that the cardioprotective effects of silencing YTHDF2 are accomplished by enhancing SLC7A11 stability and expression and reducing the level of ferroptosis, furnishing novel potential therapeutic targets for treating ischemic cardiac diseases.

2024-08-20 | GSE236721 | GEO

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Project description:This RNA-sequencing was performed to determine the differentially expressed mRNA after inhibition of Hmbox1 in cardiac ischemia/reperfusion injury

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Decorin protects cardiac myocytes against simulated ischemia/reperfusion injury

Project description:Primary cardiac myocytes isolated from neonatal Wistar rats were cultured and simulated ischemia/reperfusion injury were conducted on them in the presence or absence of decorin. Decorin is a small leucin-rich proteoglycan, which has a cardiocytoprotective effect. The underlaying mechanism of this cardiocytoprotective phenomenon is unknown, therefore our aim was to investigate the changes in the mRNA expression between the decorin (3nM) treated and vehicle-treated control cells.

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Analysis of cardiac ischemia-reperfusion injury using DIA proteomics and N-terminomics

Project description:Data used in the publication: Analysis of cardiac ischemia-reperfusion injury using DIA proteomics and N-terminomics reveals alterations in mitochondrial function and metabolism

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Project description:The objective of this study was to test how restoration of mitochondrial respiration using AOX affects the development of cardiac ischemia-reperfusion (IR) injuries in C57BL/ 6J mice. AOX transgenic mice have Ciona intestinalis AOX coding sequence knocked into the Rosa26 locus with AOX expression controlled by a CAG promoter as described elsewhere (Szibor et al. (2017) Dis Model Mech 10: 163–171). Consequences of 45 min of cardiac ischemia were studied 3 and 9 weeks after reperfusion in both wild-type and AOX litter mates.

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Project description:Calpain 1 and 2 (CPN1/2) are calcium-dependent cysteine proteases that exist in cytosol and mitochondria. Pharmacologic inhibition of CPN1/2 decreases cardiac injury during ischemia (ISC) – reperfusion (REP) by improving mitochondrial function. However, the protein targets of CPN1/2 activation during ISC-REP are unclear. CPN1/2 include a large subunit and a small regulatory subunit 1 (CPNS1). Genetic deletion of the CPNS1 eliminates the activities of both CPN1 and CPN2. Conditional, cardiomyocyte specific CPNS1 knockout (KO) mice were used in the present study to clarify the role of CPN1/2 activation in mitochondrial damage during ISC-REP with an emphasis on identifying the potential protein targets of CPN1/2. Isolated hearts from wild type (WT) or CPNS1 KO mice underwent 25 min in vitro global ISC and 30 min REP. LDH activity in coronary effluent was measured to reflect cardiac injury. Mitochondria were isolated from the hearts. Cardiac injury was decreased in CPNS1 KO mice following ISC-REP compared to WT. ISC-REP decreased the rate of oxidative phosphorylation in WT but not in CPNS1 KO mice when glutamate + malate was used as complex I substrate. KO of CPNS1 led to a smaller decrease in CRC (calcium retention capacity) following REP compared to WT. The H2O2 generation was decreased in KO mitochondria following ISC-REP compared to WT. KO of CPNS1 also resulted in less cytochrome c release from mitochondria. Proteomic analysis of the isolated mitochondria showed that KO of CPNS1 increased the abundance of ribosomal proteins and mitochondrial biogenesis proteins. These results show that activation of CPN1/2 increases cardiac injury during ischemia-reperfusion by damaging mitochondria.

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RNA-seq analysis of young swine following cardiac ischemia/reperfusion injury.

Project description:This study was a part of a larger study assessing the response of young pigs to cardiac ischemia/reperfusion (IR) injury. A mild cardiac injury approach (IR) was used in post-weaned pigs (1-month), to assess regenerative repair in young large mammals after transient ischemic injury. Female and male postnatal day (P)30 pigs were subjected to cardiac ischemia (1-hour) by occlusion of the left anterior descending artery followed by reperfusion (IR), or to sham operation. In pigs subjected to IR, myocardial damage occurred, indicated by increased circulating cardiac troponin I 2-hours post-ischemia. In addition, cardiac ejection fraction (EF) was significantly decreased 2-hours post-ischemia and reduced EF was maintained to the 4-week study end-point. Histology demonstrated evidence of CM cell cycling at 2-months of age in multinucleated CMs in both sham-operated and IR pigs. Following IR, regional scar formation and inflammation in the epicardial region proximal to injury were observed 4-weeks post-IR. Sex differences in cardiac function and collagen deposition were found, highlighting the importance of representing both sexes in cardiac injury studies. Together, our results describe an effective novel cardiac injury model in 1-month old swine, at a time when CM are still cycling. However, pigs subjected to IR show a prolonged decrease in cardiac function, and the formation of a small, regional scar with increased inflammation. Together, these data demonstrate that 1-month old pigs do not regenerate myocardium, but form a scar, after transient IR injury.

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