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Sivakumar B, Kurian GA. Investigating the temporal link between PM 2.5 exposure and acceleration of myocardial ischemia reperfusion injury: Emphasizing the hazardous presence of metals in inhaled air. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 355:124113. [PMID: 38734051 DOI: 10.1016/j.envpol.2024.124113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 04/12/2024] [Accepted: 05/03/2024] [Indexed: 05/13/2024]
Abstract
Exposure to PM2.5 is widely acknowledged to induce cardiotoxic effects, leading to decreased myocardial tolerance to revascularization procedures and subsequent ischemia reperfusion injury (IR). However, the temporal relationship between PM2.5 exposure and vulnerability to IR, along with the underlying mechanisms, remains unclear and is the focus of this study. Female Wistar rats were exposed to PM2.5 at a concentration of 250 μg/m³ for 3 h daily over varying durations (7, 14, and 21 days), followed by IR induction. Our results demonstrated a significant increase in cardiac injury, as evidenced by increased infarct size and elevated cardiac injury markers, starting from day 14 of PM2.5 exposure, accompanied by declined cardiac function. These adverse effects were associated with apoptosis and impaired mitochondrial function, including reduced bioenergetics, mitochondrial DNA copy number and quality control mechanisms, along with inactivation of the PI3K/AKT/AMPK signalling pathways. Furthermore, analysis of myocardial tissue revealed elevated metal accumulation, particularly within mitochondria. Chelation of PM2.5 -associated metals using EDTA significantly mitigated the toxic effects on cardiac IR pathology, as confirmed in both rat myocardium and H9c2 cells. These findings suggest that metals in PM2.5 play a crucial role in inducing cardiotoxicity, impairing myocardial resilience to stress through mitochondrial accumulation and dysfunction.
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Affiliation(s)
- Bhavana Sivakumar
- Vascular Biology lab, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu, India
| | - Gino A Kurian
- Vascular Biology lab, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu, India; School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur-613401, Tamil Nadu, India.
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Niu N, Miao H, Ren H. Transcriptome Analysis of Myocardial Ischemic-Hypoxic Injury in Rats and Hypoxic H9C2 Cells. ESC Heart Fail 2024. [PMID: 39010664 DOI: 10.1002/ehf2.14903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 04/18/2024] [Accepted: 05/24/2024] [Indexed: 07/17/2024] Open
Abstract
AIMS This study aimed to address inconsistencies in results between the H9C2 myocardial hypoxia (MH) cell line and myocardial infarction (MI) rat models used in MI research. We identified differentially expressed genes (DEGs) and underlying molecular mechanisms using RNA sequencing technology. METHODS RNA sequencing was used to analyse DEGs in MI rat tissues and H9C2 cells exposed to hypoxia for 24 h. Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses were used to identify key biological processes and pathways. Weighted correlation network analysis [weighted gene co-expression network analysis (WGCNA)] was used to construct gene co-expression networks, and hub genes were compared with published MI datasets [Gene Expression Omnibus (GEO)] for target identification. RESULTS GO analysis revealed enrichment of immune inflammation and mitochondrial respiration processes among 5139 DEGs in MI tissues and 2531 in H9C2 cells. KEGG analysis identified 537 overlapping genes associated with metabolism and oxidative stress pathways. Cross-analyses using the published GSE35088 and GSE47495 datasets identified 40 and 16 overlapping genes, respectively, with nine genes overlapping across all datasets and our models. WGCNA identified a key module in the MI model enriched for mRNA processing and protein binding. GO analysis revealed enrichment of mRNA processing, protein binding and mitochondrial respiratory chain complex I assembly in MI and H9C2 MH models. Five relevant hub genes were identified via a cross-analysis between the 92 hub genes that showed a common expression trend in both models. CONCLUSIONS This study reveals both shared and distinct transcriptomic responses in the MI and H9C2 models, highlighting the importance of model selection for studying myocardial ischaemia and hypoxia.
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Affiliation(s)
- Nan Niu
- Department of Cardiovascular Medicine, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, China
| | - Huangtai Miao
- Coronary Heart Disease Center,Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Hongmei Ren
- Department of Cardiovascular Medicine, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, China
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Liu T, Yan T, Jia X, Liu J, Ma R, Wang Y, Wang X, Liang Y, Xiao Y, Dong Y. Systematic exploration of the potential material basis and molecular mechanism of the Mongolian medicine Nutmeg-5 in improving cardiac remodeling after myocardial infarction. JOURNAL OF ETHNOPHARMACOLOGY 2022; 285:114847. [PMID: 34800647 DOI: 10.1016/j.jep.2021.114847] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 11/14/2021] [Accepted: 11/15/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Nutmeg-5, which consists of Myristica fragrans Houtt., Aucklandia lappa Decne., Inula helenium L., Fructus Choerospondiatis and Piper longum L., is an ancient and classic formula in traditional Mongolian medicine that is widely used in the treatment of ischemic heart disease. However, its material basis and pharmacological mechanisms remain to be fully elucidated. AIM OF THE STUDY The aim of this study was to explore the potential material basis and molecular mechanism of Nutmeg-5 in improving cardiac remodeling after myocardial infarction (MI). MATERIALS AND METHODS The constituents of Nutmeg-5 absorbed into the blood were identified by high-performance liquid chromatography-mass spectrometry (HPLC-MS/MS). A mouse MI model was induced in male Kunming mice by permanent ligation of the left anterior descending coronary artery (LDA) ligation. Echocardiography was performed to assess cardiac function. The protective effect of Nutmeg-5 and compound Danshen dripping pills as positive control medicine on post-MI cardiac remodeling was evaluated by tissue histology and determination of the serum protein levels of biomarkers of myocardial injury. RNA sequencing analysis of mouse left ventricle tissue was performed to explore the molecular mechanism of Nutmeg-5 in cardiac remodeling after MI. RESULTS A total of 27 constituents absorbed into blood were identified in rat plasma following gavage administration of Nutmeg-5 (0.54 g/kg) for 1 h. We found that ventricular remodeling after MI was significantly improved after Nutmeg-5 treatment in mice, which was demonstrated by decreased mortality, better cardiac function, decreased heart weight to body weight and heart weight to tibia length ratios, and attenuated cardiac fibrosis and myocardial injury. RNA sequencing revealed that the protective effect of Nutmeg-5 on cardiac remodeling after MI was associated with improved heart metabolism. Further study found that Nutmeg-5 treatment could preserve the ultrastructure of mitochondria and upregulate gene expression related to mitochondrial function and structure. HIF-1α (hypoxia inducible factor 1, alpha subunit) expression was significantly upregulated in the hearts of MI mice and significantly suppressed in the hearts of Nutmeg-5-treated mice. In addition, Nutmeg-5 treatment significantly activated the peroxisome proliferator-activated receptor alpha signaling pathway, which was inhibited in the hearts of MI mice. CONCLUSIONS Nutmeg-5 attenuates cardiac remodeling after MI by improving heart metabolism and preserving mitochondrial dysfunction by inhibiting HIF-1α expression in the mouse heart after MI.
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Affiliation(s)
- Tianlong Liu
- Department of Pharmacy, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010059, PR China
| | - Tingting Yan
- Department of Natural Medicinal Chemistry, College of Pharmacy, Inner Mongolia Medical University, Hohhot, 010110, PR China; Engineering Technology Research Center of Pharmacodynamic Substance and Quality Control of Mongolian Medicine in Inner Mongolia, Inner Mongolia Medical University, Hohhot, 010110, PR China
| | - Xin Jia
- Department of Pharmacy, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010059, PR China; Department of Natural Medicinal Chemistry, College of Pharmacy, Inner Mongolia Medical University, Hohhot, 010110, PR China; Engineering Technology Research Center of Pharmacodynamic Substance and Quality Control of Mongolian Medicine in Inner Mongolia, Inner Mongolia Medical University, Hohhot, 010110, PR China
| | - Jing Liu
- Department of Pharmacy, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010059, PR China
| | - Ruilian Ma
- Department of Pharmacy, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010059, PR China
| | - Yi Wang
- Department of Pharmacy, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010059, PR China
| | - Xianjue Wang
- Clinical Medical Research Center of the Affiliated Hospital, Inner Mongolia Medical University, Inner Mongolia Key Laboratory of Medical Cell Biology, Hohhot, 010050, Inner Mongolia, PR China
| | - Yabin Liang
- Clinical Medical Research Center of the Affiliated Hospital, Inner Mongolia Medical University, Inner Mongolia Key Laboratory of Medical Cell Biology, Hohhot, 010050, Inner Mongolia, PR China
| | - Yunfeng Xiao
- Engineering Technology Research Center of Pharmacodynamic Substance and Quality Control of Mongolian Medicine in Inner Mongolia, Inner Mongolia Medical University, Hohhot, 010110, PR China; Center for New Drug Safety Evaluation and Research, Inner Mongolia Medical University, Hohhot, China
| | - Yu Dong
- Department of Natural Medicinal Chemistry, College of Pharmacy, Inner Mongolia Medical University, Hohhot, 010110, PR China; Engineering Technology Research Center of Pharmacodynamic Substance and Quality Control of Mongolian Medicine in Inner Mongolia, Inner Mongolia Medical University, Hohhot, 010110, PR China.
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Huo M, Ma L, Liu G. Exploring the mechanism of Yixinyin for myocardial infarction by weighted co-expression network and molecular docking. Sci Rep 2021; 11:22567. [PMID: 34799616 PMCID: PMC8604969 DOI: 10.1038/s41598-021-01691-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 10/05/2021] [Indexed: 11/09/2022] Open
Abstract
Yixinyin, the traditional Chinese medicine, has the effects of replenishing righteous qi, and promoting blood circulation to eliminate blood stagnation. It is often used to treat patients with acute myocardial infarction (MI). The purpose of our study is to explore the key components and targets of Yixinyin in the treatment of MI. In this study, we analyzed gene expression data and clinical information from 248 samples of MI patients with the GSE34198, GSE29111 and GSE66360 data sets. By constructing a weighted gene co-expression network, gene modules related to myocardial infarction are obtained. These modules can be mapped in Yixinyin PPI network. By integrating differential genes of healthy/MI and unstable angina/MI, key targets of Yixinyin for the treatment of myocardial infarction were screened. We validated the key objectives with external data sets. GSEA analysis is used to identify the biological processes involved in key targets. Through molecular docking screening, active components that can combine with key targets in Yixinyin were obtained. In the treatment of myocardial infarction, we have obtained key targets of Yixinyin, which are ALDH2, C5AR1, FOS, IL1B, TLR2, TXNRD1. External data sets prove that they behave differently in the healthy and MI (P < 0.05). GSEA enrichment analysis revealed that they are mainly involved in pathways associated with myocardial infarction, such as viral myocarditis, VEGF signaling pathway and type I diabetes mellitus. The docking results showed that the components that can be combined with key targets in YixinYin are Supraene, Prostaglandin B1, isomucronulatol-7,2'-di-O-glucosiole, angusifolin B, Linolenic acid ethyl ester, and Mandenol. For that matter, they may be active ingredients of Yixinyin in treating MI. These findings provide a basis for the preliminary research of myocardial infarction therapy in traditional Chinese medicine and provide ideas for the design of related drugs.
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Affiliation(s)
- Mengqi Huo
- School of Chinese Material Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Lina Ma
- Rehabilitation Teaching and Research Section, Henan Medical College, Zhengzhou, China
| | - Guoguo Liu
- Department of Cardiology, Liuzhou Traditional Chinese Medicine Hospital, Liuzhou, China.
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Thakur V, Alcoreza N, Delgado M, Joddar B, Chattopadhyay M. Cardioprotective Effect of Glycyrrhizin on Myocardial Remodeling in Diabetic Rats. Biomolecules 2021; 11:569. [PMID: 33924458 PMCID: PMC8069839 DOI: 10.3390/biom11040569] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/02/2021] [Accepted: 04/07/2021] [Indexed: 01/31/2023] Open
Abstract
Myocardial fibrosis is one of the major complications of long-term diabetes. Hyperglycemia induced cardiomyocyte atrophy is a frequent pathophysiological indicator of diabetic heart. The objective of this study was to investigate the cardioprotective effect of glycyrrhizin (GLC) on myocardial damage in diabetic rats and assess the anti-inflammatory and anti-fibrotic effect of GLC. Our study demonstrates that hyperglycemia can elevate cardiac atrophy in diabetic animals. Type 2 diabetic fatty and the lean control rats were evaluated for cardiac damage and inflammation at 8-12 weeks after the development of diabetes. Western blot and immunohistochemical studies revealed that gap junction protein connexin-43 (CX43), cardiac injury marker troponin I, cardiac muscle specific voltage gated sodium channel NaV1.5 were significantly altered in the diabetic heart. Furthermore, oxidative stress mediator receptor for advanced glycation end-products (RAGE), as well as inflammatory mediator phospho-p38 MAPK and chemokine receptor CXCR4 were increased in the diabetic heart whereas the expression of nuclear factor erythroid-2-related factor 2 (Nrf2), the antioxidant proteins that protect against oxidative damage was reduced. We also observed an increase in the expression of the pleiotropic cytokine, transforming growth factor beta (TGF-β) in the diabetic heart. GLC treatment exhibited a decrease in the expression of phospho-p38 MAPK, RAGE, NaV1.5 and TGF-β and it also altered the expression of CX43, CXCR4, Nrf2 and troponin I. These observations suggest that GLC possesses cardioprotective effects in diabetic cardiac atrophy and that these effects could be mediated through activation of Nrf2 and inhibition of CXCR4/SDF1 as well as TGF-β/p38MAPK signaling pathway.
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Affiliation(s)
- Vikram Thakur
- Center of Emphasis in Diabetes and Metabolism, Department of Molecular and Translational Medicine, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX 79905, USA;
| | - Narah Alcoreza
- Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center, El Paso, TX 79905, USA;
| | - Monica Delgado
- Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), Department of Metallurgical, Materials and Biomedical Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA; (M.D.); (B.J.)
| | - Binata Joddar
- Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), Department of Metallurgical, Materials and Biomedical Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA; (M.D.); (B.J.)
| | - Munmun Chattopadhyay
- Center of Emphasis in Diabetes and Metabolism, Department of Molecular and Translational Medicine, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX 79905, USA;
- Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center, El Paso, TX 79905, USA;
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