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Fenofibrate Protects Cardiomyocytes from Hypoxia/Reperfusion- and High Glucose-Induced Detrimental Effects. PPAR Res 2021; 2021:8895376. [PMID: 33505452 PMCID: PMC7811426 DOI: 10.1155/2021/8895376] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 12/03/2020] [Accepted: 12/22/2020] [Indexed: 01/11/2023] Open
Abstract
Lesions caused by high glucose (HG), hypoxia/reperfusion (H/R), and the coexistence of both conditions in cardiomyocytes are linked to an overproduction of reactive oxygen species (ROS), causing irreversible damage to macromolecules in the cardiomyocyte as well as its ultrastructure. Fenofibrate, a peroxisome proliferator-activated receptor alpha (PPARα) agonist, promotes beneficial activities counteracting cardiac injury. Therefore, the objective of this work was to determine the potential protective effect of fenofibrate in cardiomyocytes exposed to HG, H/R, and HG+H/R. Cardiomyocyte cultures were divided into four main groups: (1) control (CT), (2) HG (25 mM), (3) H/R, and (4) HG+H/R. Our results indicate that cell viability decreases in cardiomyocytes undergoing HG, H/R, and both conditions, while fenofibrate improves cell viability in every case. Fenofibrate also decreases ROS production as well as nicotinamide adenine dinucleotide phosphate oxidase (NADPH) subunit expression. Regarding the antioxidant defense, superoxide dismutase (SOD Cu2+/Zn2+ and SOD Mn2+), catalase, and the antioxidant capacity were decreased in HG, H/R, and HG+H/R-exposed cardiomyocytes, while fenofibrate increased those parameters. The expression of nuclear factor erythroid 2-related factor 2 (Nrf2) increased significantly in treated cells, while pathologies increased the expression of its inhibitor Keap1. Oxidative stress-induced mitochondrial damage was lower in fenofibrate-exposed cardiomyocytes. Endothelial nitric oxide synthase was also favored in cardiomyocytes treated with fenofibrate. Our results suggest that fenofibrate preserves the antioxidant status and the ultrastructure in cardiomyocytes undergoing HG, H/R, and HG+H/R preventing damage to essential macromolecules involved in the proper functioning of the cardiomyocyte.
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Honda T, Hirakawa Y, Mizukami K, Yoshihara T, Tanaka T, Tobita S, Nangaku M. A distinctive distribution of hypoxia-inducible factor-1α in cultured renal tubular cells with hypoperfusion simulated by coverslip placement. Physiol Rep 2021; 9:e14689. [PMID: 33369883 PMCID: PMC7769172 DOI: 10.14814/phy2.14689] [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: 10/08/2020] [Revised: 11/11/2020] [Accepted: 11/12/2020] [Indexed: 11/24/2022] Open
Abstract
Chronic hypoxia in the renal tubulointerstitium plays a key role in the progression of chronic kidney disease (CKD). It is therefore important to investigate tubular hypoxia and the activity of hypoxia-inducible factor (HIF)-1α in response to hypoxia. Rarefaction of the peritubular capillary causes hypoperfusion in CKD; however, the effect of hypoperfusion on HIFs has rarely been investigated. We induced hypoperfusion caused by coverslip placement in human kidney-2 cells, and observed an oxygen gradient under the coverslip. Immunocytochemistry of HIF-1α showed a doughnut-shaped formation on the edge of a pimonidazole-positive area, which we named the "HIF-ring". The oxygen tension of the HIF-ring was estimated to be between approximately 4 mmHg and 20 mmHg. This result was not compatible with those of past research showing HIF-1α accumulation in the anoxic range with homogeneous oxygen tension. We further observed the presence of a pH gradient under a coverslip, as well as a shift of the HIF ring due to changes in the pH of the culture medium, suggesting that the HIF ring was formed by suppression of HIF-1α related to low pH. This research demonstrated that HIF-1α activation mimics the physiological state in cultured cells with hypoperfusion.
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Affiliation(s)
- Tomoko Honda
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Yosuke Hirakawa
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Kiichi Mizukami
- Graduate School of Science and TechnologyGunma UniversityGunmaJapan
| | | | - Tetsuhiro Tanaka
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Seiji Tobita
- Graduate School of Science and TechnologyGunma UniversityGunmaJapan
| | - Masaomi Nangaku
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
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Yang L, Lu Y, Ming J, Pan Y, Yu R, Wu Y, Wang T. SNHG16 accelerates the proliferation of primary cardiomyocytes by targeting miRNA-770-5p. Exp Ther Med 2020; 20:3221-3227. [PMID: 32855691 PMCID: PMC7444419 DOI: 10.3892/etm.2020.9083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 06/04/2020] [Indexed: 12/14/2022] Open
Abstract
The present study aimed to clarify the influence of long non-coding RNA small nuclear host gene 16 (lncRNA SNHG16) on cardiomyocyte proliferation following ischemia/reperfusion injury (IRI) and the potential mechanism. An IRI model in mice was established by performing ligation of the anterior descending coronary artery (LAD). Primary cardiomyocytes were isolated from newborn mice and subjected to H2O2 treatment to mimic in vitro IRI. Relative levels of SNHG16 and miRNA-770-5p in both in vivo and in vitro IRI models were examined. The regulatory effects of SNHG16 and miRNA-770-5p on the proliferative ability of H2O2-treated cardiomyocytes were assessed by Cell Counting Kit-8 (CCK-8) and 5-ethynyl-2'-deoxyuridine (EdU) assay. The binding relationship between SNHG16 and miRNA-770-5p was verified through dual-luciferase reporter gene assay. It is found that SNHG16 was time-dependently downregulated in the IRI models. Overexpression of SNHG16 enhanced the proliferative ability of the cardiomyocytes. miRNA-770-5p was found to be a direct target of SNHG16. Moreover, SNHG16 was able to negatively regulate the miRNA-770-5p level. Overexpression of miRNA-770-5p partially reversed the role of SNHG16 on accelerating cardiomyocyte proliferation. Collectively, SNHG16 accelerates the proliferative ability of cardiomyocytes following IRI by negatively regulating miRNA-770-5p.
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Affiliation(s)
- Linshan Yang
- Department of Cardiac Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Yan Lu
- Department of Otorhinolaryngology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Jie Ming
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Yuzhu Pan
- Department of Cardiac Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Renbin Yu
- Department of Cardiac Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Yuhui Wu
- Department of Cardiac Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Tao Wang
- Department of Cardiac Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
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Liu SP, Shibu MA, Tsai FJ, Hsu YM, Tsai CH, Chung JG, Yang JS, Tang CH, Wang S, Li Q, Huang CY. Tetramethylpyrazine reverses high-glucose induced hypoxic effects by negatively regulating HIF-1α induced BNIP3 expression to ameliorate H9c2 cardiomyoblast apoptosis. Nutr Metab (Lond) 2020; 17:12. [PMID: 32021640 PMCID: PMC6995207 DOI: 10.1186/s12986-020-0432-x] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 01/20/2020] [Indexed: 01/24/2023] Open
Abstract
Background Diabetic patients are highly vulnerable to hypoxic injury, which is associated with hypoxia induced BNIP3 expression that subsequently activate apoptosis. Our previous research show that Tetramethylpyrazine (TMP), a food flavoring agent, represses the hypoxia induced BNIP3 expression attenuate myocardial apoptosis. In this study, we evaluate the effect of TMP to provide protection against hypoxia aggravated high-glucose associated cellular apoptosis. Methods The cytoprotective effect of TMP against high glucose induced cellular damages was determined on embryo derived H9c2 cardiomyoblast cells that were subjected to 5% hypoxia for 24 h and subjected to different duration of 33 mM high glucose challenge. Further, the involvement of HIF-1α and BNIP3 in cellular damage and the mechanism of protection of TMP were determined by overexpression and silencing HIF-1α and BNIP3 protein expression. Results The results show that hypoxic effects on cell viability aggravates with high glucose challenge and this augmentative effect is mediated through BNIP3 in H9c2 cardiomyoblast cells. However, TMP administration effectively reversed the augmented HIF-1α levels and BNIP3 elevation. TMP improved the survival of H9c2 cells and effectively suppressed apoptosis in H9c2 cells. Further comparison on the effects of TMP on H9c2 cells challenged with high glucose and those challenged with hypoxia show that TMP precisely regulated the hypoxic intensified apoptotic effects in high-glucose condition. Conclusion The results clearly show that flavoring agent-TMP attenuates cytotoxicity amplified by hypoxia challenge in high glucose condition by destabilizing HIF-1α.
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Affiliation(s)
- Shih-Ping Liu
- 1Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| | - Marthandam Asokan Shibu
- 2College of Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Tzu Chi University, Hualien, Taiwan
| | - Fuu-Jen Tsai
- 3School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, 40402 Taiwan.,4China Medical University Children's Hospital, China Medical University, Taichung, Taiwan
| | - Yuan-Man Hsu
- 5Department of Biological Science and Technology, China Medical University, Taichung, Taiwan
| | - Chang-Hai Tsai
- 4China Medical University Children's Hospital, China Medical University, Taichung, Taiwan
| | - Jing-Gung Chung
- 5Department of Biological Science and Technology, China Medical University, Taichung, Taiwan
| | - Jai-Sing Yang
- 6Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan
| | - Chih-Hsin Tang
- 7Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Shulin Wang
- 8Department of Cardiology, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan, 511518 Guangdong China
| | - Qiaowen Li
- 8Department of Cardiology, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan, 511518 Guangdong China
| | - Chih-Yang Huang
- 2College of Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Tzu Chi University, Hualien, Taiwan.,7Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan.,9Department of Biotechnology, Asia University, Taichung, Taiwan
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Wu TW, Liu CC, Hung CL, Yen CH, Wu YJ, Wang LY, Yeh HI. Genetic profiling of young and aged endothelial progenitor cells in hypoxia. PLoS One 2018; 13:e0196572. [PMID: 29708992 PMCID: PMC5927426 DOI: 10.1371/journal.pone.0196572] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 04/16/2018] [Indexed: 12/11/2022] Open
Abstract
Age is a major risk factor for diseases caused by ischemic hypoxia, such as stroke and coronary artery disease. Endothelial progenitor cells (EPCs) are the major cells respond to ischemic hypoxia through angiogenesis and vascular remodeling. However, the effect of aging on EPCs and their responses to hypoxia are not well understood. CD34+ EPCs were isolated from healthy volunteers and aged by replicative senescence, which was to passage cells until their doubling time was twice as long as the original cells. Young and aged CD34+ EPCs were exposed to a hypoxic environment (1% oxygen for 48hrs) and their gene expression profiles were evaluated using gene expression array. Gene array results were confirmed using quantitative polymerase chain reaction, Western blotting, and BALB/c female athymic nude mice hindlimb ischemia model. We identified 115 differentially expressed genes in young CD34+ EPCs, 54 differentially expressed genes in aged CD34+ EPCs, and 25 common genes between normoxia and hypoxia groups. Among them, the expression of solute carrier family 2 (facilitated glucose transporter), member 1 (SLC2A1) increased the most by hypoxia in young cells. Gene set enrichment analysis indicated the pathways affected by aging and hypoxia most, including genes “response to oxygen levels” in young EPCs and genes involved “chondroitin sulfate metabolic process” in aged cells. Our study results indicate the key factors that contribute to the effects of aging on response to hypoxia in CD34+ EPCs. With the potential applications of EPCs in cardiovascular and other diseases, our study also provides insight on the impact of ex vivo expansion might have on EPCs.
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Affiliation(s)
- Tzu-Wei Wu
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
- * E-mail:
| | - Chun-Chieh Liu
- Section of Cardiology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei City, Taiwan
| | - Chung-Lieh Hung
- Section of Cardiology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei City, Taiwan
| | - Chih-Hsien Yen
- Section of Cardiology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei City, Taiwan
| | - Yih-Jer Wu
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
- Section of Cardiology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei City, Taiwan
| | - Li-Yu Wang
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
| | - Hung-I Yeh
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
- Section of Cardiology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei City, Taiwan
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Mu F, Duan J, Bian H, Zhai X, Shang P, Lin R, Zhao M, Hu D, Yin Y, Wen A, Xi M. Metabonomic Strategy for the Evaluation of Chinese Medicine Salvia miltiorrhiza and Dalbergia odorifera Interfering with Myocardial Ischemia/Reperfusion Injury in Rats. Rejuvenation Res 2017; 20:263-277. [PMID: 28093038 DOI: 10.1089/rej.2016.1884] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Extract of Salvia miltiorrhiza and Dalbergia Odorifera (SM-DOO) has been traditionally used for the prevention and treatment of cardiovascular diseases. However, information regarding the pharmacodyamic material basis and potential mechanism remain unknown. Male Sprague-Dawley rats were divided into four groups: Sham, Model, Diltiazem, and SM-DOO group, n = 6. Rats were pretreated with homologous drugs for 7 days, and then subjected to 30 minutes of ischemia followed by 180 minutes of reperfusion. Cardioprotection effects of SM-DOO on myocardial ischemia/reperfusion (MI/R) injury rats were examined by hemodynamics, infarct area, histopathology, biochemical indicators, and Western blot analysis. Metabonomics technology was further performed to evaluate the endogenous metabolites profiling systematically. According to the results of pattern recognition analysis, a clear separation of MI/R injury in the Model group and Sham group was achieved and SM-DOO pretreatment group was located much closer to the Sham group than the Model group, which was consistent with results of biochemistry and histopathological assay. Moreover, potential biomarkers were identified to elucidate the drug mechanism of SM-DOO, which may be related with pathways of energy metabolism, especially tricarboxylic acid (TCA) cycle (citric acid) and β-oxidation of fatty acids (3-hydroxybutyric, palmitoleic acid, heptadecanoic acid, and arachidonic acid). In addition, the protein expressions of p-AMPK and p-ACC in the SM-DOO group were significantly elevated, while the levels of carnitine palmitoyl-CoA transferase-1 (CPT-1), p-PDK, and p-PDC were dramatically reduced by SM-DOO. In conclusion, SM-DOO pretreatment could ameliorate MI/R injury by intervening with energy metabolism, especially TCA cycle and β-oxidation of fatty acids. This work showed that the metabonomics method combinate with conventional pharmacological methods is a promising tool in the efficacy and mechanism research of traditional Chinese medicines.
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Affiliation(s)
- Fei Mu
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University , Xi'an, China
| | - Jialin Duan
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University , Xi'an, China
| | - Haixu Bian
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University , Xi'an, China
| | - Xiaohu Zhai
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University , Xi'an, China
| | - Peijin Shang
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University , Xi'an, China
| | - Rui Lin
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University , Xi'an, China
| | - Meina Zhao
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University , Xi'an, China
| | - Dongmei Hu
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University , Xi'an, China
| | - Ying Yin
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University , Xi'an, China
| | - Aidong Wen
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University , Xi'an, China
| | - Miaomiao Xi
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University , Xi'an, China
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Huang CY, Chen SY, Fu RH, Huang YC, Chen SY, Shyu WC, Lin SZ, Liu SP. Differentiation of embryonic stem cells into cardiomyocytes used to investigate the cardioprotective effect of salvianolic acid B through BNIP3 involved pathway. Cell Transplant 2015; 24:561-71. [PMID: 25654620 DOI: 10.3727/096368915x686995] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Cardiovascular diseases are related to many risk factors, such as diabetes, high blood pressure, smoking, and obesity. Myocardial infarction (MI), a cardiovascular disease, is the most common cause of cardiomyocyte death. In MI, hypoxia induces cardiomyocyte apoptosis; in particular, diabetes combined with MI has a synergistic effect that exacerbates cardiomyocyte death. The hypoxia-inducible factor-1α (HIF1α) transcriptional factor and a BH-3 only protein, Bcl-2 adenovirus E1B 19-kDa interacting protein 3 (BNIP3), are known to play fundamental roles in both adaptive and cell death processes in response to hypoxia. In addition, most cardioprotective studies used H9c2 cells that were not beating, so H9c2 cells may not be the best model for testing cardioprotective effects. Embryonic stem cells (ESCs) are pluripotent stem cells that are able to differentiate into several types of cells, including cardiomyocytes. In this study, we reveal a simple method to differentiate ESCs into cardiomyocytes by using poly-d-lysine-coated plates combined with ITS and N2-containing medium and characterized the ESC-derived cardiomyocytes by cardiomyocyte marker staining. The ESC-derived cardiomyocytes were used to investigate the protective effect of salvianolic acid B (Sal-B) in high glucose combined with hypoxic conditions to mimic diabetes patients with ischemia. The results of MTT and TUNEL assays indicate that Sal-B suppresses the apoptotic effect of treatment with high glucose combined with hypoxia in ESC-derived cardiomyocytes. In particular, Sal-B inhibited HIF1α, BNIP3, and cleavage caspase 3 expression levels, thereby suppressing apoptosis. This is the first study to mention the correlation between BNIP3 and Sal-B for cardioprotective effects. In conclusion, we suggest that Sal-B may be suitable for use as a future cardioprotective medicine.
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Affiliation(s)
- Chih-Yang Huang
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan
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Chang RL, Lin JW, Hsieh DJY, Yeh YL, Shen CY, Day CH, Ho TJ, Viswanadha VP, Kuo WW, Huang CY. Long-term hypoxia exposure enhanced IGFBP-3 protein synthesis and secretion resulting in cell apoptosis in H9c2 myocardial cells. Growth Factors 2015; 33:275-81. [PMID: 26340107 DOI: 10.3109/08977194.2015.1077824] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Myocardial infarction (MI) usually results in myocardial ischemia, remodeling and hypoxia that lead to cell death. To date, the insulin-like growth factor binding protein-3 (IGFBP3) is known to play an important role in insulin growth factor (IGF) bioavailability. Previous studies have found that hypoxia results in cell apoptosis. However, the detailed mechanism and roles of IGFBP3 in long-term hypoxia (LTH) regulated heart cell apoptosis remains unknown. In this study H9c2 cardiomyoblast cells were treated with investigated long-term hypoxic exposure with the possible mechanisms involved. The results showed that LTH enhanced IGFBP3 protein synthesis and induced its secretion. The accumulated IGFBP3 sequestered Insulin growth factor 1 (IGF-1) away from the type I IGF receptor (IGF-1 R), which blocked the IGF1R/PI3K/Akt survival signaling pathway, resulting in cell apoptosis. According to our findings, IGFBP3 could be a valuable target for developing treatments for cardiac diseases in long-term hypoxia exposure patients.
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Affiliation(s)
- Ruey-Lin Chang
- a Graduate Institute of Basic Medical Science, China Medical University , Taichung , Taiwan
| | - Jing-Wei Lin
- a Graduate Institute of Basic Medical Science, China Medical University , Taichung , Taiwan
| | - Dennis Jine-Yuan Hsieh
- b School of Medical Laboratory and Biotechnology, Chung Shan Medical University , Taichung , Taiwan
| | - Yu-Lan Yeh
- c Department of Pathology , Changhua Christian Hospital , Changhua , Taiwan
- d en-Teh Junior College of Medicine, Nursing and Management , Miaoli , Taiwan
| | - Chia-Yao Shen
- e Department of Nursing , Mei Ho University , Pingtung , Taiwan
| | | | - Tsung-Jung Ho
- f Chinese Medicine Department , China Medical University Beigang Hospital , Taichung , Taiwan
| | | | - Wei-Wen Kuo
- h Department of Biological Science and Technology , China Medical University , Taichung , Taiwan
| | - Chih-Yang Huang
- a Graduate Institute of Basic Medical Science, China Medical University , Taichung , Taiwan
- i Graduate Institute of Chinese Medical Science, China Medical University , Taichung , Taiwan , and
- j Department of Health and Nutrition Biotechnology , Asia University , Taichung , Taiwan
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Liu Y, Li G, Lu H, Li W, Li X, Liu H, Li X, Li T, Yu B. Expression profiling and ontology analysis of long noncoding RNAs in post-ischemic heart and their implied roles in ischemia/reperfusion injury. Gene 2014; 543:15-21. [PMID: 24726549 DOI: 10.1016/j.gene.2014.04.016] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Revised: 03/22/2014] [Accepted: 04/07/2014] [Indexed: 02/03/2023]
Abstract
Long noncoding RNAs (lncRNAs) play important regulatory roles in cellular physiology. The contributions of lncRNAs to ischemic heart disease remain largely unknown. The aim of this study was to investigate the profile of myocardial lncRNAs and their potential roles at early stage of reperfusion. lncRNAs and mRNAs were profiled by microarray and the expression of some highly-dysregulated lncRNAs was further validated using polymerase chain reaction. Our results revealed that 64 lncRNAs were up-regulated and 87 down-regulated, while 50 mRNAs were up-regulated and 60 down-regulated in infarct region at all reperfusion sampled. Gene ontology analysis indicated that dysregulated transcripts were associated with immune response, spermine catabolic process, taxis, chemotaxis, polyamine catabolic process, spermine metabolic process, chemokine activity and chemokine receptor binding. Target gene-related pathway analysis showed significant changes in cytokine-cytokine receptor interaction, the chemokine signaling pathway and nucleotide oligomerization domain (NOD)-like receptor signaling pathway which have a close relationship with myocardial ischemia/reperfusion injury (MI/RI). Besides, a gene co-expression network was constructed to identify correlated targets of 10 highly-dysregulated lncRNAs. These lncRNAs may play their roles by this network in post-ischemic heart. Such results provide a foundation for understanding the roles and mechanisms of myocardial lncRNAs at early stage of reperfusion.
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Affiliation(s)
- Youbin Liu
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Heilongjiang Province, China; Department of Cardiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, PR China
| | - Guangnan Li
- Department of Cardiology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, PR China
| | - Huimin Lu
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, Harbin, PR China
| | - Wei Li
- Department of Cardiology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, PR China
| | - Xianglu Li
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Heilongjiang Province, China; Department of Cardiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, PR China
| | - Huimin Liu
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Heilongjiang Province, China; Department of Cardiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, PR China
| | - Xingda Li
- Department of Pharmacology, Harbin Medical University, Harbin, PR China
| | - Tianyu Li
- Department of Pharmacology, Harbin Medical University, Harbin, PR China
| | - Bo Yu
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Heilongjiang Province, China; Department of Cardiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, PR China.
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Demonstration of the retention of 64Cu-ATSM in cardiac myocytes using a novel incubation chamber for screening hypoxia-dependent radiotracers. Nucl Med Commun 2013; 34:1015-22. [DOI: 10.1097/mnm.0b013e328363f25e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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11
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Signaling pathways in mitochondrial dysfunction and aging. Mech Ageing Dev 2010; 131:536-43. [PMID: 20655326 DOI: 10.1016/j.mad.2010.07.003] [Citation(s) in RCA: 177] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Revised: 07/01/2010] [Accepted: 07/14/2010] [Indexed: 12/23/2022]
Abstract
Mitochondria are central players in the determination of cell life and death. They are essential for energy production, since most cellular ATP is produced in their matrix by the oxidative phosphorylation pathway. At the same time, mitochondria are the main regulators of apoptotic cell death, mediating both extrinsic (cell-surface receptor mediated) and intrinsic apoptotic pathways. Reactive oxygen species (ROS) accumulate as side products of the electron transport chain, causing mitochondrial damage. Non-functional mitochondria accumulate in aged individuals, and cell homeostasis is maintained by removing damaged mitochondria by an autophagic process called "mitophagy". In addition, mitochondrial ROS represent signaling molecules leading to autophagy, consisting in the bulk degradation of cytosolic portions. When cell homeostasis is perturbed, and cytosolic components are damaged, autophagy represents a defense mechanism aimed at removing non-functional proteins and organelles. If this is not sufficient, cell death occurs with distinct morphological hallmarks from apoptosis. This binary choice integrates a number of critical information converging on a number of common regulatory elements. In this review, the focus will be placed on the central role of mitochondria in the cross-talk between autophagy and apoptosis, highlighting the signaling pathways and molecular machinery impinging on these organelles.
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Burton TR, Gibson SB. The role of Bcl-2 family member BNIP3 in cell death and disease: NIPping at the heels of cell death. Cell Death Differ 2009; 16:515-23. [PMID: 19136941 PMCID: PMC3158804 DOI: 10.1038/cdd.2008.185] [Citation(s) in RCA: 158] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Bcl-2 nineteen-kilodalton interacting protein (BNIP3) is a BH-3-only Bcl-2 family member whose expression levels increase during stress such as hypoxia through hypoxia-inducing factor-1-dependent or -independent mechanisms. When BNIP3 expression is induced, it localizes to the mitochondria and triggers a loss of membrane potential, and an increase in the reactive oxygen species production, which often leads to cell death. Cells under normal growth conditions suppress BNIP3 expression through transcriptional repression. There is considerable debate in the literature regarding what type of cell death is induced by BNIP3. It has been observed that BNIP3 could induce necrosis, autophagy and/or apoptosis. In contrast, other studies indicate that BNIP3 could promote cell survival. Besides its cell death regulation, BNIP3 plays a key role in the pathogenicity of many diseases. In cardiac infarction, loss of BNIP3 expression has been shown to reduce the number of damaged cardiomyocytes after ischemia and reperfusion. BNIP3 expression also plays an important role in the deregulation of cell death in many cancers. In this review, we will discuss the different and often contradictory mechanisms of BNIP3 regulation of cell death and the role that BNIP3 may play in diseases.
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Affiliation(s)
- Teralee R. Burton
- Manitoba Institute of Cell Biology, Winnipeg, MB, Canada
- Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, MB, Canada
| | - Spencer B. Gibson
- Manitoba Institute of Cell Biology, Winnipeg, MB, Canada
- Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, MB, Canada
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