Coronary endothelial P-selectin in pathogenesis of myocardial ischemia-reperfusion injury

1998 ◽  
Vol 275 (5) ◽  
pp. H1865-H1872 ◽  
Author(s):  
Anthony J. Palazzo ◽  
Steven P. Jones ◽  
Donald C. Anderson ◽  
D. Neil Granger ◽  
David J. Lefer
Keyword(s):  
Myocardial Ischemia ◽  
Infarct Size ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Myocardial Infarct Size ◽  
Wild Type ◽  
Area At Risk ◽  
Myocardial Ischemia Reperfusion

We investigated in vivo coronary P-selectin expression and its pathophysiological consequences in a murine model of myocardial ischemia-reperfusion (MI/R) using wild-type and P-selectin deficient (−/−) mice. Coronary P-selectin expression [μg monoclonal antibody (MAb)/g tissue] was measured using a radiolabeled MAb method after 30 min of myocardial ischemia and 20 min of reperfusion. P-selectin expression in wild-type mice was significantly ( P< 0.01) elevated in the ischemic zone (0.070 ± 0.010) compared with the nonischemic zone (0.037 ± 0.008). Myocardial P-selectin expression was nearly undetectable in P-selectin −/− mice after MI/R. Furthermore, myocardial infarct size (% of area at risk) after 30 min of myocardial ischemia and 120 min of reperfusion was 42.5 ± 4.4 in wild-type mice and 24.4 ± 4.0 in P-selectin −/− mice ( P < 0.05). In additional experiments of prolonged myocardial ischemia (60 min) and reperfusion (120 min), myocardial infarct size was similar in P-selectin −/− mice and wild-type mice. Our results clearly demonstrate the involvement of coronary P-selectin in the development of myocardial infarction after MI/R.

scholarly journals eNOS is required for acute in vivo ischemic preconditioning of the heart: effects of ischemic duration and sex

2010 ◽  
Vol 299 (2) ◽  
pp. H437-H445 ◽  
Author(s):  
M. A. Hassan Talukder ◽  
Fuchun Yang ◽  
Hiroaki Shimokawa ◽  
Jay L. Zweier
Keyword(s):  
Myocardial Ischemia ◽  
Ischemic Preconditioning ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Myocardial Infarct Size ◽  
Area At Risk ◽  
Myocardial Ischemia Reperfusion ◽  
Ischemic Duration

Ischemic preconditioning (IPC) is a powerful phenomenon that provides potent cardioprotection in mammalian hearts; however, the role of endothelial nitric oxide (NO) synthase (eNOS)-mediated NO in this process remains highly controversial. Questions also remain regarding this pathway as a function of sex and ischemic duration. Therefore, we performed extensive experiments in wild-type (WT) and eNOS knockout (eNOS−/−) mice to evaluate whether the infarct-limiting effect of IPC depends on eNOS, ischemic periods, and sex. Classical IPC was induced by three cycles of 5 min of regional coronary ischemia separated by 5 min of reperfusion and was followed by 30 or 60 min of sustained ischemia and 24 h of reperfusion. The control ischemia-reperfusion protocol had 30 or 60 min of ischemia followed by 24 h of reperfusion. Protection was evaluated by measuring the myocardial infarct size as a percentage of the area at risk. The major findings were that regardless of sex, WT mice exhibited robust IPC with significantly smaller myocardial infarction, whereas eNOS−/− mice did not. IPC-induced cardiac protection was absent in eNOS−/− mice of both Jackson and Harvard origin. In general, female WT mice had smaller infarctions compared with male WT mice. Although prolonged ischemia caused significantly larger infarctions in WT mice of both sexes, they were consistently protected by IPC. Importantly, prolonged myocardial ischemia was associated with increased mortality in eNOS−/− mice, and the survival rate was higher in female eNOS−/− mice compared with male eNOS−/− mice. In conclusion, IPC protects WT mice against in vivo myocardial ischemia-reperfusion injury regardless of sex and ischemic duration, but the deletion of eNOS abolishes the cardioprotective effect of classical IPC.

Abstract 289: Cardiac-Specific Ectonucleoside Triphosphate Diphosphohydrolase 1 Overexpression Affords Protection from Myocardial Infarction and Reperfusion Injury

2012 ◽  
Vol 111 (suppl_1) ◽  
Author(s):  
Zhaobin Xu ◽  
Debra G Wheeler ◽  
Shouvik D Mahamud ◽  
Karen M Dwyer ◽  
Simon C Robson ◽  
...  
Keyword(s):  
Myocardial Ischemia ◽  
Infarct Size ◽  
Reperfusion Injury ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Myocardial Infarct Size ◽  
Area At Risk ◽  
Tetrazolium Chloride ◽  
Myocardial Ischemia Reperfusion

Background: During myocardial stress, extracellular levels of adenosine triphosphate (ATP) and adenosine diphosphate (ADP) increase. These extracellular ATP and ADP levels are modulated via hydrolysis by ectonucleoside triphosphate diphosphohydrolase 1 (ENTDP-1/CD39) to adenosine monophosphate (AMP) subsequently converted by ecto-5'-nucleotidase (CD73) to the anti-thrombotic, cardioprotective nucleoside, adenosine. Previous data demonstrated significantly smaller infarcts in mice globally overexpressing CD39. The current objective was to determine whether tissue specific overexpression of CD39 in the heart would reduce myocardial ischemia/reperfusion injury. Methods: Myocardial ischemia/reperfusion (I/R) injury was evaluated in transgenic mice overexpressing human CD39 driven by the α-MHC promoter. I/R injury was induced by ligation of the left anterior descending (LAD) artery for 60 min followed by 24 hours of reperfusion. Myocardial infarct size was determined by staining with triphenyl tetrazolium chloride (TTC) and the area-at-risk was delineated by perfusion with 5% Phthalo Blue. Results: Expression of CD39 in the heart tissue was confirmed by Western blot analysis. In response to 60 minutes of ischemia followed by 24 hours of reperfusion, α-MHC CD39-OE animals displayed a marked reduction in infarct size (WT: 31.68%±4.64 vs TG: 6.14%± 2.48, N=5/group, P<0.01), relative to wild-type controls (Figure). Conclusions: Overexpression of CD39 in cardiac tissue alone significantly attenuates myocardial ischemic injury.

scholarly journals Luteolin Modulates SERCA2a Leading to Attenuation of Myocardial Ischemia/ Reperfusion Injury via Sumoylation at Lysine 585 in Mice

2018 ◽  
Vol 45 (3) ◽  
pp. 883-898 ◽  
Author(s):  
Yinping Du ◽  
Ping Liu ◽  
Tongda Xu ◽  
Defeng Pan ◽  
Hong Zhu ◽  
...  
Keyword(s):  
Myocardial Ischemia ◽  
Infarct Size ◽  
Ischemia Reperfusion Injury ◽  
Heart Function ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Myocardial Infarct Size ◽  
Myocardial Ischemia Reperfusion

Background/Aims: The myocardial sarcoplasmic reticulum calcium ATPase (SERCA2a) is a pivotal pump responsible for calcium cycling in cardiomyocytes. The present study investigated the effect of luteolin (Lut) on restoring SERCA2a protein level and stability reduced by myocardial ischemia/reperfusion (I/R) injury. We verified a hypothesis that Lut protected against myocardial I/R injury by regulating SERCA2a SUMOylation. Methods: The hemodynamic data, myocardial infarct size of intact hearts, apoptotic analysis, mitochondrial membrane potential (ΔΨm), the level of SERCA2a SUMOylation, and the activity and expression of SERCA2a were examined in vivo and in vitro to clarify the cardioprotective effects of Lut after SUMO1 was knocked down or over-expressed. The putative SUMO conjugation sites in mouse SERCA2a were investigated as the possible regulatory mechanism of Lut. Results: Initially, we found that Lut reversed the SUMOylation and stability of SERCA2a as well as the expression of SUMO1, which were reduced by I/R injury in vitro. Furthermore, Lut increased the expression and activity of SERCA2a partly through SUMO1, thus improving ΔΨm and reducing apoptotic cells in vitro and promoting the recovery of heart function and reducing infarct size in vivo. We also demonstrated that SUMO acceptor sites in mouse SERCA2a involving lysine 585, 480 and 571. Among the three acceptor sites, Lut enhanced SERCA2a stability via lysine 585. Conclusions: Our results suggest that Lut regulates SERCA2a through SUMOylation at lysine 585 to attenuate myocardial I/R injury.

Abstract 16381: Novel Thiol-activated H2S Donors Attenuate Myocardial Ischemia/Reperfusion Injury

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Chelsea Organ ◽  
Zhen Li ◽  
Yu Zhao ◽  
Chuntao Yang ◽  
Shashi Bhushan ◽  
...  
Keyword(s):  
Myocardial Ischemia ◽  
Sustained Release ◽  
Murine Model ◽  
Troponin I ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Myocardial Infarct Size ◽  
Myocardial Ischemia Reperfusion

Background: Hydrogen sulfide (H2S) protects against acute myocardial ischemia/reperfusion (MI/R) injury and heart failure by ameliorating oxidative stress, improving mitochondrial function, and attenuating apoptosis. One of the major limitations of currently available H2S donors is poor pharmacokinetics profiles that result in very rapid and uncontrolled H2S release. NSHD-1 and NSHD-2 are recently developed thiol-activated H2S donors designed for sustained release of H2S upon activation by molecules containing thiol groups such as cysteine and glutathione. We hypothesized that these novel H2S donors would generate H2S for extended periods and ameliorate myocardial cell death following MI/R in an in vivo murine model. Methods and Results: C57BL6/J male mice (10-12 weeks of age) were subjected to 45 minutes of MI followed by 24 hours of R. At the time of reperfusion, animals received Vehicle (0.5% THF), NSHD-1 (50 μg/kg and 100 μg/kg), or NSHD-2 (50 μg/kg) by direct intracardiac (i.c.) injection. In addition, at 4 hours of R, plasma was collected for troponin-I measurements. In preliminary studies we observed sustained release of H2S with both of these H2S donors. Myocardial infarct size was reduced by 35% (p < 0.01 vs. Vehicle) in mice treated with NSHD-1 (100 μg/kg), 43% (p < 0.05 vs. Vehicle) in mice treated with NSHD-2 (50 μg/kg), and 54% (p < 0.01 vs. Vehicle) in mice treated with NSHD-2 (100 μg/kg). Conclusions: NSHD-1 and NSHD-2 significantly attenuate MI/R injury in a murine model. Experiments are currently underway to further define the in vivo pharmacokinetics of H2S release from these agents, mechanisms of action, and safety profile.

Long-term infusion of Met5-enkephalin fails to protect murine hearts against ischemia-reperfusion injury

2005 ◽  
Vol 288 (4) ◽  
pp. H1717-H1723 ◽  
Author(s):  
Koh Kuzume ◽  
Kazuyo Kuzume ◽  
Zhiping Cao ◽  
Lijuan Liu ◽  
Donna M. Van Winkle
Keyword(s):  
Myocardial Ischemia ◽  
Infarct Size ◽  
Ischemia Reperfusion Injury ◽  
Ischemia Reperfusion ◽  
Opioid Peptide ◽  
Area At Risk ◽  
Regional Myocardial Ischemia ◽  
Chronic Infusion ◽  
Myocardial Ischemia Reperfusion

Recently, we reported that exogenous administration of Met5-enkephalin (ME) for 24 h reduces infarct size after ischemia-reperfusion in rabbits. In the present study, we tested whether ME-induced cardioprotection is exhibited in murine hearts and whether chronic infusion of this peptide can render hearts tolerant to ischemia. Barbiturate-anesthetized open-chest mice (C57BL/6J) were subjected to regional myocardial ischemia-reperfusion (45 min of occlusion and 20 min of reperfusion). Mice received saline vehicle or ME for 24 h or 2 wk before undergoing regional myocardial ischemia-reperfusion or for 24 h followed by a 24-h delay before regional myocardial ischemia-reperfusion. Infarct size was measured with propidium iodide and is expressed as a percentage of the area at risk. Infarcts were smaller after infusion of ME for 24 h than with vehicle control: 49.2 ± 9.0% vs. 22.2 ± 3.2% ( P < 0.01). In contrast, administration of ME for 2 wk failed to elicit cardioprotection: 36.5 ± 9.1% and 41.4 ± 8.2% for control and ME, respectively ( P = not significant). When a 24-h delay was imposed between the end of drug treatment and the onset of the ischemic insult, cardioprotection was lost: 38.5 ± 6.1% and 42.8 ± 6.6% for control and ME, respectively ( P = not significant). Chronic sustained exogenous infusion of the endogenously produced opioid peptide ME is associated with loss of the cardioprotection that is observed with 24 h of infusion. Furthermore, in this in vivo murine model, ME failed to induce delayed tolerance to myocardial ischemia-reperfusion.

Increased ROCK1 not ROCK2 in circulating leukocytes in rats with myocardial ischemia/reperfusion

Perfusion ◽  
2020 ◽  
Vol 35 (8) ◽  
pp. 819-825
Author(s):  
Chao Cheng ◽  
Xiao-Bo Liu ◽  
Dong-Ling Xu ◽  
Juan Zhang
Keyword(s):  
Myocardial Ischemia ◽  
Reperfusion Injury ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Myocardial Infarct Size ◽  
Myocardial Ischemia Reperfusion Injury ◽  
Myocardial Ischemia Reperfusion ◽  
Rock Activity

Background: Rho-associated protein kinase (ROCK) plays a vital role in the pathogenesis of many cardiovascular diseases. Previous studies have demonstrated that ROCK is overactivated and involved in myocardial ischemia/reperfusion in vivo. But the role of ROCK in circulating leukocytes during myocardial ischemia/reperfusion is not well studied. Material and methods: This study was performed to evaluate ROCK activity in circulating leukocytes in rats with myocardial ischemia/reperfusion injury. Myocardial ischemia/reperfusion Wistar rats were subjected to 30-min ischemia followed by 180-min reperfusion. ROCK activity in circulating leukocytes was examined by the phosphorylation state of myosin phosphatase targeting subunit 1, a substrate of ROCK. Results: ROCK activity significantly increased in leukocytes in rat ischemia/reperfusion models compared to the sham group. ROCK1 not ROCK2 level in circulating leukocytes was significantly elevated in ischemia/reperfusion. Administration of the selective inhibitor of ROCK, fasudil, significantly reduced myocardial infarct size, myocyte apoptosis, and inflammatory cytokine, including interleukin 6 and tumor necrosis factor α. Furthermore, fasudil upregulated ischemia/reperfusion-induced reduction of nitric oxide production. Conclusion: Increased ROCK1 not ROCK2 in circulating leukocytes plays a role in the pathogenesis of myocardial ischemia/reperfusion injury. Inhibition of ROCK1 in circulating leukocytes has an important role in fasudil-induced cardioprotective effects. ROCK1 in circulating leukocytes might be a new biomarker in myocardial ischemia/reperfusion injury.

scholarly journals Morphine Reduces Myocardial Infarct Size via Heat Shock Protein 90 in Rodents

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Bryce A. Small ◽  
Yao Lu ◽  
Anna K. Hsu ◽  
Garrett J. Gross ◽  
Eric R. Gross
Keyword(s):  
Myocardial Ischemia ◽  
Infarct Size ◽  
Protein Import ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Mitochondrial Protein ◽  
Myocardial Infarct Size ◽  
Hsp90 Inhibition ◽  
Myocardial Ischemia Reperfusion

Opioids reduce injury from myocardial ischemia-reperfusion in humans. In experimental models, this mechanism involves GSK3βinhibition. HSP90 regulates mitochondrial protein import, with GSK3βinhibition increasing HSP90 mitochondrial content. Therefore, we determined whether morphine-induced cardioprotection is mediated by HSP90 and if the protective effect is downstream of GSK3βinhibition. Male Sprague-Dawley rats, aged 8–10 weeks, were subjected to anin vivomyocardial ischemia-reperfusion injury protocol involving 30 minutes of ischemia followed by 2 hours of reperfusion. Hemodynamics were continually monitored and myocardial infarct size determined. Rats received morphine (0.3 mg/kg), the GSK3βinhibitor, SB216763 (0.6 mg/kg), or saline, 10 minutes prior to ischemia. Some rats received selective HSP90 inhibitors, radicicol (0.3 mg/kg), or deoxyspergualin (DSG, 0.6 mg/kg) alone or 5 minutes prior to morphine or SB216763. Morphine reduced myocardial infarct size when compared to control (42 ± 2% versus 60 ± 1%). This protection was abolished by prior treatment of radicicol or DSG (59 ± 1%, 56 ± 2%). GSK3βinhibition also reduced myocardial infarct size (41 ± 2%) with HSP90 inhibition by radicicol or DSG partially inhibiting SB216763-induced infarct size reduction (54 ± 3%, 47 ± 1%, resp.). These data suggest that opioid-induced cardioprotection is mediated by HSP90. Part of this protection afforded by HSP90 is downstream of GSK3β, potentially via the HSP-TOM mitochondrial import pathway.

Abstract 300: Topical Application of IcyHot Reduces Myocardial Infarct Size in Rodents by a TRPA1-dependent Mechanism

2017 ◽  
Vol 121 (suppl_1) ◽  
Author(s):  
Yun Wu ◽  
Yao Lu ◽  
Eric R Gross
Keyword(s):  
Infarct Size ◽  
Transient Receptor Potential ◽  
Ischemia Reperfusion Injury ◽  
Calcium Influx ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Myocardial Infarct Size ◽  
Sprague Dawley ◽  
Area At Risk ◽  
Reactive Aldehydes

Toxic reactive aldehydes are formed during ischemia-reperfusion. The ion channel transient receptor potential ankryin 1 (TRPA1) is irreversibly modified by reactive aldehydes which can cause calcium influx and cell death. Here we tested whether topically applied creams containing a reversible TRPA1 agonist could reduce myocardial infarct size. Male Sprague-Dawley rats 8-10 weeks age were subjected to an in vivo myocardial ischemia-reperfusion model of 30 minutes of left anterior descending (LAD) coronary artery ischemia followed by 2 hours reperfusion. Prior to ischemia, rats were untreated or had 1g of cream applied to the abdomen. The creams tested were IcyHot, Bengay, Tiger Balm, or preparation H (Fig. 1A). Hearts were negatively stained for the area at risk and the infarct size was determined by using TTC staining (Fig. 1B). A subset of rodents prior to receiving IcyHot also received an intravenous bolus of the TRPA1 antagonist TCS-5861528 (1mg/kg) or AP-18 (1mg/kg). Interestingly, both IcyHot and Bengay reduced myocardial infarct size compared to untreated rodents (Fig. 1C and 1D IcyHot: 41±3%*, Bengay: 50±2%* versus control 62±1%, n=6/group, *P<0.001). Both preparation H and Tiger Balm failed to reduce myocardial infarct size (Tiger Balm: 63±2%, preparation H 59±2%). Giving a TRPA1 antagonist prior to IcyHot also blocked the reduction in infarct size. Our additional data also indicates the methyl salicylate (mint) in IcyHot and Bengay is the agent that limits myocardial infarct size. Since IcyHot and Bengay are safely used by humans, targeting TRPA1 by using products such as these could be quickly translatable and widely used to reduce ischemia-reperfusion injury.

scholarly journals The Antioxidant, Anti-Inflammatory and Anti-Apoptotic Activities of the Bauhinia Championii Flavone are Connected with Protection Against Myocardial Ischemia/Reperfusion Injury

2016 ◽  
Vol 38 (4) ◽  
pp. 1365-1375 ◽  
Author(s):  
Jie Jian ◽  
Feifei Xuan ◽  
Feizhang Qin ◽  
Renbin Huang
Keyword(s):  
Myocardial Ischemia ◽  
Caspase 3 ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Terminal Deoxynucleotidyl Transferase ◽  
Enzyme Linked Immunosorbent Assay ◽  
Tunel Staining ◽  
Myocardial Infarct Size ◽  
Myocardial Ischemia Reperfusion

Background/Aims: Previous studies have demonstrated that Bauhinia championii flavone (BCF) exhibits anti-oxidative, anti-hypoxic and anti-stress properties. This study was designed to investigate whether BCF has a cardioprotective effect against myocardial ischemia/reperfusion (I/R) injuries in rats and to shed light on its possible mechanism. Methods: The model of I/R was established by ligating the left anterior descending coronary artery for 30 min, then reperfusing for 180 min. Hemodynamic changes were continuously monitored. The content of malondialdehyde (MDA) as well as the lactate dehydrogenase (LDH), superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities were assessed. The release of interleukin-6 (IL-6) was measured by enzyme-linked immunosorbent assay (ELISA). Apoptosis of cardiomyocytes was determined by caspase-3 activity and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining. The expression of TLR4, NF-κBp65, Bcl-2 and Bax were detected by western blotting. Results: Pretreatment with BCF significantly reduced the serum levels of LDH, MDA and IL-6, but increased the activities of SOD and GSH-Px. It also attenuated myocardial infarct size, reduced the apoptosis rate and preserved cardiac function. Furthermore, BCF inhibited caspase-3 activity and the expression of TLR4, phosphorylated NF-κBp65 and Bax, but enhanced the expression of Bcl-2. Conclusion: These results provide substantial evidence that BCF exerts a protective effect on myocardial I/R injury, which may be attributed to attenuating lipid peroxidation, the inflammatory response and apoptosis.

scholarly journals Daucosterol pretreatment ameliorates myocardial ischemia reperfusion injury via ROS-mediated NLRP3 inflammasome activation

2020 ◽  
Vol 19 (5) ◽  
pp. 1031-1036
Author(s):  
Guixiang Zhao ◽  
Xiaoyun Ma ◽  
Juledezi Hailati ◽  
Zhen Bao ◽  
Maerjiaen Bakeyi ◽  
...  
Keyword(s):  
Myocardial Ischemia ◽  
Nlrp3 Inflammasome ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Inflammasome Activation ◽  
Myocardial Infarct Size ◽  
Nlrp3 Inflammasome Activation ◽  
Myocardial Ischemia Reperfusion Injury ◽  
Myocardial Ischemia Reperfusion

Purpose: To determine the involvement of NLRP3 signaling pathway in the preventive role of daucosterol in acute myocardial infarction (AMI).Methods: H9C2 cells were pretreated with daucosterol before hypoxia/reoxygenation (HR) injury. Myocardial ischemia reperfusion (IR) was established in male SD rats, followed by reperfusion. Myocardial infarct size was measured. The serum levels of creatine kinase (CK), lactate  dehydrogenase (LDH), total superoxide dismutase (T-SOD), and malondialdehyde (MDA) were determined using commercial kits. NLRP3 inflammasome activation was assessed by western blotting.Results: Myocardial infarct size was smaller after IR injury in rats pretreated with daucosterol (10 and 50 mg/kg) than that pretreated with daucosterol (0 and 1 mg/kg). The increase in LDH, CK, and MDA levels after IR injury was reduced following daucosterol pretreatment. Reactive oxygen species (ROS) production increased, whereas T-SOD activity decreased after IR injury. These changes were prevented by pretreatment of daucosterol (10 and 50 mg/kg). Protein expression of NLRP3 inflammasome increased after IR injury in H9C2 cells while pretreatment with daucosterol inhibited the upregulation of NLRP3 inflammasome.Conclusion: The cardioprotective effect of daucosterol pretreatment appears to be mediated via the inactivation of ROS-related NLRP3 inflammasome, suggesting that daucosteol might be a potential therapeutic drug for AMI. Keywords: Daucosterol, Myocardial ischemia, Reperfusion injury, Reactive oxygen species, NLRP3 inflammasome

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