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Gastaldi S, Giordano M, Blua F, Rubeo C, Boscaro V, Femminò S, Comità S, Gianquinto E, Landolfi V, Marini E, Gallicchio M, Spyrakis F, Pagliaro P, Bertinaria M, Penna C. Novel NLRP3 inhibitor INF195: Low doses provide effective protection against myocardial ischemia/reperfusion injury. Vascul Pharmacol 2024; 156:107397. [PMID: 38897555 DOI: 10.1016/j.vph.2024.107397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/21/2024] [Accepted: 06/16/2024] [Indexed: 06/21/2024]
Abstract
BACKGROUND Several factors contribute to ischemia/reperfusion injury (IRI), including activation of the NLRP3 inflammasome and its byproducts, such as interleukin-1β (IL-1β) and caspase-1. However, NLRP3 may paradoxically exhibit cardioprotective properties. This study aimed to assess the protective effects of the novel NLRP3 inhibitor, INF195, both in vitro and ex vivo. METHODS To investigate the relationship between NLRP3 and myocardial IRI, we synthetized a series of novel NLRP3 inhibitors, and investigated their putative binding mode via docking studies. Through in vitro studies we identified INF195 as optimal for NLRP3 inhibition. We measured infarct-size in isolated mouse hearts subjected to 30-min global ischemia/one-hour reperfusion in the presence of three different doses of INF195 (5, 10, or 20-μM). We analyzed caspase-1 and IL-1β concentration in cardiac tissue homogenates by ELISA. Statistical significance was determined using one-way ANOVA followed by Tukey's test. RESULTS AND CONCLUSION INF195 reduces NLRP3-induced pyroptosis in human macrophages. Heart pre-treatment with 5 and 10-μM INF195 significantly reduces both infarct size and IL-1β levels. Data suggest that intracardiac NLRP3 activation contributes to IRI and that low doses of INF195 exert cardioprotective effects by reducing infarct size. However, at 20-μM, INF195 efficacy declines, leading to a lack of cardioprotection. Research is required to determine if high doses of INF195 have off-target effects or dual roles, potentially eliminating both harmful and cardioprotective functions of NLRP3. Our findings highlight the potential of a new chemical scaffold, amenable to further optimization, to provide NLRP3 inhibition and cardioprotection in the ischemia/reperfusion setting.
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Affiliation(s)
- Simone Gastaldi
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 9, 10125 Torino, Italy
| | - Magalì Giordano
- Department of Clinical and Biological Sciences, University of Turin, Regione Gonzole 10, Orbassano, 10043 Torino, Italy
| | - Federica Blua
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 9, 10125 Torino, Italy
| | - Chiara Rubeo
- Department of Clinical and Biological Sciences, University of Turin, Regione Gonzole 10, Orbassano, 10043 Torino, Italy
| | - Valentina Boscaro
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 9, 10125 Torino, Italy
| | - Saveria Femminò
- Department of Clinical and Biological Sciences, University of Turin, Regione Gonzole 10, Orbassano, 10043 Torino, Italy
| | - Stefano Comità
- Department of Clinical and Biological Sciences, University of Turin, Regione Gonzole 10, Orbassano, 10043 Torino, Italy
| | - Eleonora Gianquinto
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 9, 10125 Torino, Italy
| | - Vanessa Landolfi
- Department of Clinical and Biological Sciences, University of Turin, Regione Gonzole 10, Orbassano, 10043 Torino, Italy
| | - Elisabetta Marini
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 9, 10125 Torino, Italy
| | - Margherita Gallicchio
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 9, 10125 Torino, Italy
| | - Francesca Spyrakis
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 9, 10125 Torino, Italy
| | - Pasquale Pagliaro
- Department of Clinical and Biological Sciences, University of Turin, Regione Gonzole 10, Orbassano, 10043 Torino, Italy; INRC, Bologna, Italy.
| | - Massimo Bertinaria
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 9, 10125 Torino, Italy; Department of Clinical and Biological Sciences, University of Turin, Regione Gonzole 10, Orbassano, 10043 Torino, Italy.
| | - Claudia Penna
- Department of Clinical and Biological Sciences, University of Turin, Regione Gonzole 10, Orbassano, 10043 Torino, Italy; INRC, Bologna, Italy
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Sharma S, Sharma D, Dhobi M, Wang D, Tewari D. An insight to treat cardiovascular diseases through phytochemicals targeting PPAR-α. Mol Cell Biochem 2024; 479:707-732. [PMID: 37171724 DOI: 10.1007/s11010-023-04755-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 04/28/2023] [Indexed: 05/13/2023]
Abstract
Peroxisome proliferator-activated receptor-α (PPAR-α) belonging to the nuclear hormone receptor superfamily is a promising target for CVDs which mechanistically improves the production of high-density lipid as well as inhibit vascular smooth muscle cell proliferation. PPAR-α mainly interferes with adenosine monophosphate-activated protein kinase, transforming growth factor-β-activated kinase, and nuclear factor-κB pathways to protect against cardiac complications. Natural products/extracts could serve as a potential therapeutic strategy in CVDs for targeting PPAR-α with broad safety margins. In recent years, the understanding of naturally derived PPAR-α agonists has considerably improved; however, the information is scattered. In vitro and in vivo studies on acacetin, apigenin, arjunolic acid, astaxanthin, berberine, resveratrol, vaticanol C, hispidulin, ginsenoside Rb3, and genistein showed significant effects in CVDs complications by targeting PPAR-α. With the aim of demonstrating the tremendous chemical variety of natural products targeting PPAR-α in CVDs, this review provides insight into various natural products that can work to prevent CVDs by targeting the PPAR-α receptor along with their detailed mechanism.
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Affiliation(s)
- Supriya Sharma
- Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University, New Delhi, 110017, India
| | - Divya Sharma
- Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University, New Delhi, 110017, India
| | - Mahaveer Dhobi
- Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University, New Delhi, 110017, India.
| | - Dongdong Wang
- Centre for Metabolism, Obesity and Diabetes Research, McMaster University, Hamilton, ON, Canada.
- Department of Medicine, McMaster University, Hamilton, ON, Canada.
| | - Devesh Tewari
- Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University, New Delhi, 110017, India.
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3
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Altered sialin mRNA gene expression in type 2 diabetic male Wistar rats: implications for nitric oxide deficiency. Sci Rep 2023; 13:4013. [PMID: 36899088 PMCID: PMC10006425 DOI: 10.1038/s41598-023-31240-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 03/08/2023] [Indexed: 03/12/2023] Open
Abstract
Nitrate therapy has been suggested to boost nitric oxide (NO) levels in type 2 diabetes (T2D); however, little is known about nitrate transport across the membranes. This study aimed to assess changes in the mRNA expression of sialin, as a nitrate transporter, in the main tissues of rats with T2D. Rats were divided into two groups (n = 6/group): Control and T2D. A high-fat diet combined with a low dose of streptozotocin (STZ, 30 mg/kg) was used to induce T2D. At month 6, samples from the main tissues of rats were used to measure the mRNA expression of sialin and levels of NO metabolites. Rats with T2D had lower nitrate levels in the soleus muscle (66%), lung (48%), kidney (43%), aorta (30%), adrenal gland (58%), epididymal adipose tissue (eAT) (61%), and heart (37%) and had lower nitrite levels in the pancreas (47%), kidney (42%), aorta (33%), liver (28%), eAT (34%), and heart (32%). The order of sialin gene expression in control rats was: soleus muscle > kidney > pancreas > lung > liver > adrenal gland > brain > eAT > intestine > stomach > aorta > heart. Compared to controls, rats with T2D had higher sialin mRNA expressions in the stomach (2.1), eAT (2.0), adrenal gland (1.7), liver (8.9), and soleus muscle (3.4), and lower sialin expression in the intestine (0.56), pancreas (0.42), and kidney (0.44), all P values < 0.05. These findings indicate altered sialin mRNA expression in the main tissues of male T2D rats and may have implications for future NO-based treatment of T2D.
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Ortona S, Barisione C, Ferrari PF, Palombo D, Pratesi G. PCSK9 and Other Metabolic Targets to Counteract Ischemia/Reperfusion Injury in Acute Myocardial Infarction and Visceral Vascular Surgery. J Clin Med 2022; 11:jcm11133638. [PMID: 35806921 PMCID: PMC9267902 DOI: 10.3390/jcm11133638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/13/2022] [Accepted: 06/17/2022] [Indexed: 12/13/2022] Open
Abstract
Ischemia/reperfusion (I/R) injury complicates both unpredictable events (myocardial infarction and stroke) as well as surgically-induced ones when transient clampage of major vessels is needed. Although the main cause of damage is attributed to mitochondrial dysfunction and oxidative stress, the use of antioxidant compounds for protection gave poor results when challenged in clinics. More recently, there is an assumption that, in humans, profound metabolic changes may prevail in driving I/R injury. In the present work, we narrowed the field of search to I/R injury in the heart/brain/kidney axis in acute myocardial infarction, major vascular surgery, and to the current practice of protection in both settings; then, to help the definition of novel strategies to be translated clinically, the most promising metabolic targets with their modulatory compounds—when available—and new preclinical strategies against I/R injury are described. The consideration arisen from the broad range of studies we have reviewed will help to define novel therapeutic approaches to ensure mitochondrial protection, when I/R events are predictable, and to cope with I/R injury, when it occurs unexpectedly.
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Affiliation(s)
- Silvia Ortona
- Vascular and Endovascular Surgery Unit, IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi, 10, 16132 Genoa, Italy; (S.O.); (D.P.); (G.P.)
| | - Chiara Barisione
- Department of Surgical and Integrated Diagnostic Sciences, University of Genoa, Viale Benedetto XV, 6, 16132 Genoa, Italy
- Correspondence: ; Tel.: +39-010-555-7881
| | - Pier Francesco Ferrari
- Department of Civil, Chemical and Environmental Engineering, University of Genoa, Via Opera Pia, 15, 16145 Genoa, Italy;
| | - Domenico Palombo
- Vascular and Endovascular Surgery Unit, IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi, 10, 16132 Genoa, Italy; (S.O.); (D.P.); (G.P.)
- Department of Surgical and Integrated Diagnostic Sciences, University of Genoa, Viale Benedetto XV, 6, 16132 Genoa, Italy
- Research Center for Biologically Inspired Engineering in Vascular Medicine and Longevity, University of Genoa, Via Montallegro, 1, 16145 Genoa, Italy
| | - Giovanni Pratesi
- Vascular and Endovascular Surgery Unit, IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi, 10, 16132 Genoa, Italy; (S.O.); (D.P.); (G.P.)
- Department of Surgical and Integrated Diagnostic Sciences, University of Genoa, Viale Benedetto XV, 6, 16132 Genoa, Italy
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Yan S, Sui M, Tian H, Fu J, Li Y, Chen J, Zeng L, Ding X. Transcriptomic Analysis Revealed an Important Role of Peroxisome-Proliferator-Activated Receptor Alpha Signaling in Src Homology Region 2 Domain-Containing Phosphatase-1 Insufficiency Leading to the Development of Renal Ischemia-Reperfusion Injury. Front Med (Lausanne) 2022; 9:847512. [PMID: 35646989 PMCID: PMC9134314 DOI: 10.3389/fmed.2022.847512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Accepted: 04/06/2022] [Indexed: 12/02/2022] Open
Abstract
In kidney transplantation, the donor kidney inevitably undergoes ischemia-reperfusion injury (IRI). It is of great importance to study the pathogenesis of IRI and find effective measures to attenuate acute injury of renal tubules after ischemia-reperfusion. Our previous study found that Src homology region 2 domain-containing phosphatase-1 (SHP-1) insufficiency aggravates renal IRI. In this study, we systematically analyzed differences in the expression profiles of SHP-1 (encoded by Ptpn6)-insufficient mice and wild-type mice by RNA-seq. We found that a total of 161 genes showed at least a twofold change, with a false discovery rate <0.05 in Ptpn6 +/mev mice after IRI and 42 genes showing more than a fourfold change. Of the eight genes encoding proteins with immunoreceptor tyrosine-based inhibitory motifs (ITIMs) that bind to Ptpn6, three were upregulated, and five were downregulated. We found that for the differentially expressed genes (DEGs) with a fold change >2, the most significantly enriched Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways were the cell division pathway and peroxisome-proliferator activated receptor PPARα signaling pathways. Furthermore, the downregulated genes of the PPARα signaling pathway were mainly related to fatty acid absorption and degradation. Using an agonist of the PPARα signaling pathway, fenofibrate, we found that renal IRI was significantly attenuated in Ptpn6 +/mev mice. In summary, our results show that insufficiency of SHP-1 inhibits the expression of genes in the PPARα signaling pathway, thereby leading to increased reactive oxygen species (ROS) and exacerbating the renal IRI. The PPARα signaling agonist fenofibrate partially attenuates renal IRI induced by SHP-1 insufficiency.
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Affiliation(s)
- Sijia Yan
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Mingxing Sui
- Department of Organ Transplantation, Changhai Hospital, Navy Medical University, Shanghai, China
| | - Hongzhe Tian
- Department of Urology Surgery-General Hospital of Central Theater Command of PLA, Wuhan, China
| | - Jiazhao Fu
- Department of Organ Transplantation, Changhai Hospital, Navy Medical University, Shanghai, China
| | - Yanfeng Li
- Department of Organ Transplantation, Changhai Hospital, Navy Medical University, Shanghai, China
| | - Jing Chen
- Department of Laboratory and Diagnosis, Changhai Hospital, Navy Medical University, Shanghai, China
| | - Li Zeng
- Department of Organ Transplantation, Changhai Hospital, Navy Medical University, Shanghai, China
| | - Xianting Ding
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
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Zhu G, Wang X, Chen L, Lenahan C, Fu Z, Fang Y, Yu W. Crosstalk Between the Oxidative Stress and Glia Cells After Stroke: From Mechanism to Therapies. Front Immunol 2022; 13:852416. [PMID: 35281064 PMCID: PMC8913707 DOI: 10.3389/fimmu.2022.852416] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 02/08/2022] [Indexed: 12/12/2022] Open
Abstract
Stroke is the second leading cause of global death and is characterized by high rates of mortality and disability. Oxidative stress is accompanied by other pathological processes that together lead to secondary brain damage in stroke. As the major component of the brain, glial cells play an important role in normal brain development and pathological injury processes. Multiple connections exist in the pathophysiological changes of reactive oxygen species (ROS) metabolism and glia cell activation. Astrocytes and microglia are rapidly activated after stroke, generating large amounts of ROS via mitochondrial and NADPH oxidase pathways, causing oxidative damage to the glial cells themselves and neurons. Meanwhile, ROS cause alterations in glial cell morphology and function, and mediate their role in pathological processes, such as neuroinflammation, excitotoxicity, and blood-brain barrier damage. In contrast, glial cells protect the Central Nervous System (CNS) from oxidative damage by synthesizing antioxidants and regulating the Nuclear factor E2-related factor 2 (Nrf2) pathway, among others. Although numerous previous studies have focused on the immune function of glial cells, little attention has been paid to the role of glial cells in oxidative stress. In this paper, we discuss the adverse consequences of ROS production and oxidative-antioxidant imbalance after stroke. In addition, we further describe the biological role of glial cells in oxidative stress after stroke, and we describe potential therapeutic tools based on glia cells.
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Affiliation(s)
- Ganggui Zhu
- Department of Neurosurgery, Hangzhou First People's Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaoyu Wang
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Luxi Chen
- Department of Medical Genetics, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Cameron Lenahan
- Center for Neuroscience Research, Loma Linda University School of Medicine, Loma Linda, CA, United States.,Department of Biomedical Science, Burrell College of Osteopathic Medicine, Las Cruces, NM, United States
| | - Zaixiang Fu
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yuanjian Fang
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Wenhua Yu
- Department of Neurosurgery, Hangzhou First People's Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Jeddi S, Gheibi S, Afzali H, Carlström M, Kashfi K, Ghasemi A. Hydrogen sulfide potentiates the protective effects of nitrite against myocardial ischemia-reperfusion injury in type 2 diabetic rats. Nitric Oxide 2022; 124:15-23. [DOI: 10.1016/j.niox.2022.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 03/06/2022] [Accepted: 04/27/2022] [Indexed: 10/18/2022]
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8
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Yao F, Zhang X, Yao X, Ren X, Xia X, Jiang J, Ding L. Peroxisome Proliferator-Activated Receptor α Activation Protects Retinal Ganglion Cells in Ischemia-Reperfusion Retinas. Front Med (Lausanne) 2022; 8:788663. [PMID: 35004756 PMCID: PMC8732875 DOI: 10.3389/fmed.2021.788663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Accepted: 11/24/2021] [Indexed: 01/04/2023] Open
Abstract
Background and Objective: Retinal ischemia-reperfusion (IR) leads to massive loss of retinal ganglion cells (RGC) and characterizes several blind-causing ophthalmic diseases. However, the mechanism related to retinal IR is controversial, and a drug that could prevent the RGC loss caused by IR is still lacking. This study aimed to investigate the role of endogenous retinal peroxisome proliferator-activated receptor (PPAR)α and the therapeutic effect of its agonist, fenofibric acid (FA), in IR-related retinopathy. Materials and Methods: Fenofibric acid treatment was applied to the Sprague-Dawley rats with IR and retinal cell line 28 cells with oxygen-glucose deprivation (OGD) (an in vitro model of IR). Western blotting, real-time PCR, and immunofluorescence were used to examine the expression levels of PPARα, glial fibrillary acidic protein (GFAP), and cyclooxygenase-2 (COX2). Hematoxylin and eosin (HE) staining, propidium iodide (PI) staining, retrograde tracing, and flash visual-evoked potential (FVEP) were applied to assess RGC injury and visual function. Results: Retinal IR down-regulated PPARα expression in vitro and in vivo. Peroxisome proliferator-activated receptor α activation by FA promoted survival of RGCs, mitigated thinning of the ganglion cell complex, and decreased the latency of positive waves of FVEPs after IR injury. Further, FA treatment enhanced the expression of endogenous PPARα and suppressed the expression of GFAP and COX2 significantly. Conclusion: Peroxisome proliferator-activated receptor α activation by FA is protective against RGC loss in retinal IR condition, which may occur by restoring PPARα expression, inhibiting activation of glial cells, and suppressing retinal inflammation. All these findings indicate the translational potential of FA in treating IR-related retinopathy.
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Affiliation(s)
- Fei Yao
- Eye Center of Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Ophthalmology, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
| | - Xuan Zhang
- Eye Center of Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Ophthalmology, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
| | - Xueyan Yao
- Eye Center of Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Ophthalmology, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
| | - Xiaohua Ren
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China.,Department of Human Resource, Xiangya Hospital, Central South University, Changsha, China
| | - Xiaobo Xia
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China.,Department of Human Resource, Xiangya Hospital, Central South University, Changsha, China
| | - Jian Jiang
- Eye Center of Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Ophthalmology, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
| | - Lexi Ding
- Eye Center of Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Ophthalmology, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
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9
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Mousavi S, Khazeei Tabari MA, Bagheri A, Samieefar N, Shaterian N, Kelishadi R. The Role of p66Shc in Diabetes: A Comprehensive Review from Bench to Bedside. J Diabetes Res 2022; 2022:7703520. [PMID: 36465704 PMCID: PMC9715346 DOI: 10.1155/2022/7703520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/02/2022] [Accepted: 11/09/2022] [Indexed: 11/27/2022] Open
Abstract
It is well-documented that diabetes is an inflammatory and oxidative disease, with an escalating global burden. Still, there is no definite treatment for diabetes or even prevention of its harmful complications. Therefore, understanding the molecular pathways associated with diabetes might help in finding a solution. p66Shc is a member of Shc family proteins, and it is considered as an oxidative stress sensor and regulator in cells. There are inconsistent data about the role of p66Shc in inducing diabetes, but accumulating evidence supports its role in the pathogenesis of diabetes-related complications, including macro and microangiopathies. There is growing hope that by understanding and targeting molecular pathways involved in this network, prevention of diabetes or its complications would be achievable. This review provides an overview about the role of p66Shc in the development of diabetes and its complications.
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Affiliation(s)
- SeyedehFatemeh Mousavi
- Student Research Committee, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- USERN Office, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Amin Khazeei Tabari
- Student Research Committee, Mazandaran University of Medical Sciences, Mazandaran, Iran
- USERN Office, Mazandaran University of Medical Sciences, Mazandaran, Iran
| | - Alireza Bagheri
- USERN Office, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Department of Genetics, Faculty of Basic Sciences, Shahrekord University, Shahrekord, Iran
| | - Noosha Samieefar
- Student Research Committee, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- USERN Office, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Negar Shaterian
- Student Research Committee, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
- USERN Office, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Roya Kelishadi
- Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
- USERN Office, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
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Sharma A, Mah M, Ritchie RH, De Blasio MJ. The adiponectin signalling pathway - A therapeutic target for the cardiac complications of type 2 diabetes? Pharmacol Ther 2021; 232:108008. [PMID: 34610378 DOI: 10.1016/j.pharmthera.2021.108008] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 08/17/2021] [Accepted: 09/23/2021] [Indexed: 12/11/2022]
Abstract
Diabetes is associated with an increased risk of heart failure (HF). This is commonly termed diabetic cardiomyopathy and is often characterised by increased cardiac fibrosis, pathological hypertrophy, increased oxidative and endoplasmic reticulum stress as well as diastolic dysfunction. Adiponectin is a cardioprotective adipokine that is downregulated in settings of type 2 diabetes (T2D) and obesity. Furthermore, both adiponectin receptors (AdipoR1 and R2) are also downregulated in these settings which further results in impaired cardiac adiponectin signalling and reduced cardioprotection. In many cardiac pathologies, adiponectin signalling has been shown to protect against cardiac remodelling and lipotoxicity, however its cardioprotective actions in T2D-induced cardiomyopathy remain unresolved. Diabetic cardiomyopathy has historically lacked effective treatment options. In this review, we summarise the current evidence for links between the suppressed adiponectin signalling pathway and cardiac dysfunction, in diabetes. We describe adiponectin receptor-mediated signalling pathways that are normally associated with cardioprotection, as well as current and potential future therapeutic approaches that could target this pathway as possible interventions for diabetic cardiomyopathy.
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Affiliation(s)
- Abhipree Sharma
- Heart Failure Pharmacology, Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Michael Mah
- Heart Failure Pharmacology, Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Rebecca H Ritchie
- Heart Failure Pharmacology, Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia; Department of Pharmacology, Monash University, Clayton, VIC 3800, Australia; Department of Medicine, Monash University, Clayton, VIC 3800, Australia
| | - Miles J De Blasio
- Heart Failure Pharmacology, Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia; Department of Pharmacology, Monash University, Clayton, VIC 3800, Australia.
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Tanaka S, Ito S, Shimamoto C, Matsumura H, Inui T, Marunaka Y, Nakahari T. Nitric oxide synthesis stimulated by arachidonic acid accumulation via PPARα in acetylcholine-stimulated gastric mucous cells. Exp Physiol 2021; 106:1939-1949. [PMID: 34216172 DOI: 10.1113/ep089517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 06/28/2021] [Indexed: 12/13/2022]
Abstract
NEW FINDINGS What is the central question of this study? Arachidonic acid (AA) stimulates NO production in antral mucous cells without any increase in [Ca2+ ]i . Given that the intracellular AA concentration is too low to measure, the relationship between AA accumulation and NO production remains uncertain. Is AA accumulation a key step for NO production? What is the main finding and its importance? We demonstrated that AA accumulation is a key step for NO production. The amount of AA released could be measured using fluorescence-HPLC. The intracellular AA concentration was maintained at < 1 μM. Nitric oxide is produced by AA accumulation in antral mucous cells, not as a direct effect of [Ca2+ ]i . ABSTRACT In the present study, we demonstrate that NO production is stimulated by an accumulation of arachidonic acid (AA) mediated via peroxisome proliferation-activated receptor α (PPARα) and that the NO produced enhances Ca2+ -regulated exocytosis in ACh-stimulated antral mucous cells. The amount of AA released from the antral mucosa, measured by fluorescence high-performance liquid chromatography (F-HPLC), was increased by addition of ionomycin (10 μM) or ACh, suggesting that AA accumulation is stimulated by an increase in [Ca2+ ]i . The AA production was inhibited by an inhibitor of cytosolic phospholipase A2 (cPLA2-inhα). GW6471 (a PPARα inhibitor) and cPLA2-inhα inhibited NO synthesis stimulated by ACh. Moreover, indomethacin, an inhibitor of cyclooxygenase, stimulated AA accumulation and NO production. However, acetylsalicylic acid did not stimulate AA production and NO synthesis. An analogue of AA (AACOCF3) alone stimulated NO synthesis, which was inhibited by GW6471. In antral mucous cells, indomethacin enhanced Ca2+ -regulated exocytosis by increasing NO via PPARα, and the enhancement was abolished by GW6471 and cPLA2-inhα. Thus, AA produced via PLA2 activation is the key step for NO synthesis in ACh-stimulated antral mucous cells and plays important roles in maintaining antral mucous secretion, especially in Ca2+ -regulated exocytosis.
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Affiliation(s)
- Saori Tanaka
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, Biwako Kusatsu Campus, Ritsumeikan University, Kusatsu, Japan.,Laboratory of Pharmacotherapy, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Shigenori Ito
- Department of Chemistry, Faculty of Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Chikao Shimamoto
- Laboratory of Pharmacotherapy, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Hitoshi Matsumura
- Laboratory of Pharmacotherapy, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Toshio Inui
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, Biwako Kusatsu Campus, Ritsumeikan University, Kusatsu, Japan.,Saisei Mirai Clinics, Moriguchi, Japan
| | - Yoshinori Marunaka
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, Biwako Kusatsu Campus, Ritsumeikan University, Kusatsu, Japan.,Medical Research Institute, Kyoto Industrial Health Association, Kyoto, Japan.,Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takashi Nakahari
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, Biwako Kusatsu Campus, Ritsumeikan University, Kusatsu, Japan
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12
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Abstract
Peroxisome proliferator-activated receptors (PPARs) belong to the nuclear hormone receptor family. They are ligand-activated transcription factors and exist in three different isoforms, PPARα (NR1C1), PPARβ/δ (NR1C2), and PPARγ (NR1C3). PPARs regulate a variety of functions, including glucose and lipid homeostasis, inflammation, and development. They exhibit tissue and cell type-specific expression patterns and functions. Besides the established notion of the therapeutic potential of PPAR agonists for the treatment of glucose and lipid disorders, more recent data propose specific PPAR ligands as potential therapies for cardiovascular diseases. In this review, we focus on the knowledge of PPAR function in myocardial infarction, a severe pathological condition for which therapeutic use of PPAR modulation has been suggested.
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13
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Protective effect of intermediate doses of hydrogen sulfide against myocardial ischemia-reperfusion injury in obese type 2 diabetic rats. Life Sci 2020; 256:117855. [PMID: 32473245 DOI: 10.1016/j.lfs.2020.117855] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 05/17/2020] [Accepted: 05/25/2020] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Subjects with type 2 diabetes (T2D) have lower circulating hydrogen sulfide (H2S) levels following myocardial ischemia and a higher risk of mortality. The aim of this study was to determine the dose-dependent favorable effects of sodium hydrosulfide (NaSH) on myocardial ischemia-reperfusion (IR) injury in rats with T2D. METHODS T2D was induced using a high-fat diet (HFD) and low-dose of streptozotocin. Rats were divided into control, T2D, and T2D + NaSH groups. NaSH (0.28, 0.56, 1.6, 2.8, and 5.6 mg/kg) was administered intraperitoneally for 9 weeks. At the end of the study, heart from all rats were isolated and left ventricular developed pressure (LVDP) and the peak rates of positive and negative changes in LV pressure (±dp/dt) were recorded during baseline and following myocardial IR injury. In addition, infarct size as well as mRNA expression of H2S- and nitric oxide (NO)-producing enzymes were measured. RESULTS In diabetic rats, NaSH only at doses of 0.56 and 1.6 mg/kg increased recovery of LVDP (16% and 42%), +dp/dt (25% and 35%) and -dp/dt (23% and 32%) as well as decreased infarct size (44% and 35%). At these doses, NaSH increased expressions of cystathionine γ-lyase (CSE) (440% and 271%) and endothelial NO synthase (eNOS) (232% and 148%) but it decreased the expressions of inducible NOS (iNOS) (55% and 71%). NaSH at 0.28, 2.8 and 5.6 mg/kg had no significant effects on these parameters. CONCLUSION NaSH had a bell-shaped cardioprotective effect against myocardial IR injury in rats with T2D. Higher tolerance to IR injury in heart isolated from type 2 diabetic rats treated with intermediate doses of NaSH is associated with higher CSE-derived H2S and eNOS-derived NO as well as lower iNOS-derived NO.
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14
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Zhang SY, Yang KL, Long ZY, Li WQ, Huang HY. Use of a Systematic Pharmacological Methodology to Explore the Mechanism of Shengmai Powder in Treating Diabetic Cardiomyopathy. Med Sci Monit 2020; 26:e919029. [PMID: 32023237 PMCID: PMC7020766 DOI: 10.12659/msm.919029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Accepted: 10/08/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Cardiovascular complications, such as diabetic cardiomyopathy (DCM), are the leading cause of death in diabetic patients. Shengmai Powder (SMP) was found to have cardioprotective effects. MATERIAL AND METHODS Based on the systematic pharmacological methodology, this research determined the genes of DCM and the known targets of SMP, predicted potential compounds and targets of SMP, constructed networks for DCM and SMP, and performed network analysis. RESULTS Five network were constructed: (1) the DCM gene PPI network; (2) the Compound-compound target network of SMP; (3) the SMP-DCM PPI network; (4) the Compound-known target network of SMP; (5) and the SMP known target-DCM PPI network. Several DCM and treatment related targets, clusters, signaling pathways, and biological processes were found. CONCLUSIONS SMP is able to regulate glycometabolism-related, lipid metabolism-related, inflammatory response-related, oxidative stress-related signaling pathways, and biological processes and targets, which suggests that SMP may have a therapeutic effect on DCM.
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Affiliation(s)
- Shi-ying Zhang
- Department of Traditional Chinese Medicine, Shenzhen Luohu People’s Hospital, Shenzhen, Guangdong, P.R. China
- Hunan University of Chinese Medicine, Changsha, Hunan, P.R. China
- Department of Traditional Chinese Medicine, The Third Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, P.R. China
- Department of Traditional Chinese Medicine, Shenzhen Luohu Hospital Group Luohu People’s Hospital, Shenzhen, Guangdong, P.R. China
| | - Kai-lin Yang
- Department of Cardiac Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing, P.R. China
- Capital Medical University, Beijing, P.R. China
| | - Zhi-yong Long
- Shantou University Medical College, Shantou University, Shantou, Guangdong, P.R. China
- Department of Rehabilitation Medicine, Guangdong Geriatric Institute, Guangdong General Hospital and Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, P.R. China
| | - Wei-qing Li
- Department of Traditional Chinese Medicine, Shenzhen Luohu People’s Hospital, Shenzhen, Guangdong, P.R. China
- Department of Traditional Chinese Medicine, The Third Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, P.R. China
- Department of Traditional Chinese Medicine, Shenzhen Luohu Hospital Group Luohu People’s Hospital, Shenzhen, Guangdong, P.R. China
| | - Hui-yong Huang
- Hunan University of Chinese Medicine, Changsha, Hunan, P.R. China
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15
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Shao Y, Chen J, Dong LJ, He X, Cheng R, Zhou K, Liu J, Qiu F, Li XR, Ma JX. A Protective Effect of PPARα in Endothelial Progenitor Cells Through Regulating Metabolism. Diabetes 2019; 68:2131-2142. [PMID: 31451517 PMCID: PMC6804623 DOI: 10.2337/db18-1278] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 08/23/2019] [Indexed: 12/12/2022]
Abstract
Deficiency of endothelial progenitor cells, including endothelial colony-forming cells (ECFCs) and circulating angiogenic cells (CACs), plays an important role in retinal vascular degeneration in diabetic retinopathy (DR). Fenofibrate, an agonist of peroxisome proliferator-activated receptor α (PPARα), has shown therapeutic effects on DR in both patients and diabetic animal models. However, the function of PPARα in ECFC/CACs has not been defined. In this study, we determined the regulation of ECFC/CAC by PPARα. As shown by flow cytometry and Seahorse analysis, ECFC/CAC numbers and mitochondrial function were decreased in the bone marrow, circulation, and retina of db/db mice, correlating with PPARα downregulation. Activation of PPARα by fenofibrate normalized ECFC/CAC numbers and mitochondrial function in diabetes. In contrast, PPARα knockout exacerbated ECFC/CAC number decreases and mitochondrial dysfunction in diabetic mice. Primary ECFCs from PPARα -/- mice displayed impaired proliferation, migration, and tube formation. Furthermore, PPARα -/- ECFCs showed reduced mitochondrial oxidation and glycolysis compared with wild type, correlating with decreases of Akt phosphorylation and expression of its downstream genes regulating ECFC fate and metabolism. These findings suggest that PPARα is an endogenous regulator of ECFC/CAC metabolism and cell fate. Diabetes-induced downregulation of PPARα contributes to ECFC/CAC deficiency and retinal vascular degeneration in DR.
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Affiliation(s)
- Yan Shao
- Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
- Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
- Department of Physiology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Jianglei Chen
- Department of Physiology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Li-Jie Dong
- Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
- Department of Physiology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Xuemin He
- Department of Physiology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Rui Cheng
- Department of Physiology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Kelu Zhou
- Department of Physiology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Juping Liu
- Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Fangfang Qiu
- Department of Physiology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Xiao-Rong Li
- Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
- Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Jian-Xing Ma
- Department of Physiology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK
- Harold Hamm Diabetes Center, The University of Oklahoma Health Sciences Center, Oklahoma City, OK
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16
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Russell JS, Griffith TA, Helman T, Du Toit EF, Peart JN, Headrick JP. Chronic type 2 but not type 1 diabetes impairs myocardial ischaemic tolerance and preconditioning in C57Bl/6 mice. Exp Physiol 2019; 104:1868-1880. [PMID: 31535419 DOI: 10.1113/ep088024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 09/18/2019] [Indexed: 01/08/2023]
Abstract
NEW FINDINGS • What is the central question of this study? What is the impact of chronic adult-onset diabetes on cardiac ischaemic outcomes and preconditioning? • What is the main finding and its importance? Chronic adult-onset type 2 but not type 1 diabetes significantly impairs myocardial ischaemic tolerance and ischaemic preconditioning. Preconditioning may be detrimental in type 2 diabetes, exaggerating nitrosative stress and apoptotic protein expression. ABSTRACT Effects of diabetes on myocardial responses to ischaemia-reperfusion (I-R) and cardioprotective stimuli remain contentious, potentially reflecting influences of disease duration and time of onset. Chronic adult-onset type 1 diabetes (T1D) and type 2 diabetes (T2D) were modelled non-genetically in male C57Bl/6 mice via 5 × 50 mg kg-1 daily streptozotocin (STZ) injections + 12 weeks' standard chow or 1 × 75 mg kg-1 STZ injection + 12 weeks' obesogenic diet (32% calories as fat, 57% carbohydrate, 11% protein), respectively. Systemic outcomes were assessed and myocardial responses to I-R ± ischaemic preconditioning (IPC; 3 × 5 min I-R) determined in Langendorff perfused hearts. Uncontrolled T1D was characterised by pronounced hyperglycaemia (25 mm fasting glucose), glucose intolerance and ∼10% body weight loss, whereas T2D mice exhibited moderate hyperglycaemia (15 mm), hyperinsulinaemia, glucose intolerance and 17% weight gain. Circulating ghrelin, resistin and noradrenaline were unchanged with T1D, while leptin increased and noradrenaline declined in T2D mice. Ischaemic tolerance and IPC were preserved in T1D hearts. In contrast, T2D worsened post-ischaemic function (∼40% greater diastolic and contractile dysfunction) and cell death (100% higher troponin efflux), and abolished IPC protection. Whereas IPC reduced post-ischaemic nitrotyrosine and pro-apoptotic Bak and Bax levels in non-diabetic hearts, these effects were reduced in T1D and IPC augmented Bax and nitrosylation in T2D hearts. The data demonstrate chronic T1D does not inhibit myocardial I-R tolerance or IPC, whereas metabolic and endocrine disruption in T2D is associated with ischaemic intolerance and inhibition of IPC. Indeed, normally protective IPC may exaggerate damage mechanisms in T2D hearts.
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Affiliation(s)
- Jake S Russell
- School of Medical Science, Griffith University Gold Coast, Southport, Queensland, 4217, Australia
| | - Tia A Griffith
- School of Medical Science, Griffith University Gold Coast, Southport, Queensland, 4217, Australia
| | - Tessa Helman
- School of Medical Science, Griffith University Gold Coast, Southport, Queensland, 4217, Australia
| | - Eugene F Du Toit
- School of Medical Science, Griffith University Gold Coast, Southport, Queensland, 4217, Australia
| | - Jason N Peart
- School of Medical Science, Griffith University Gold Coast, Southport, Queensland, 4217, Australia
| | - John P Headrick
- School of Medical Science, Griffith University Gold Coast, Southport, Queensland, 4217, Australia
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17
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Qu X, Chen X, Shi Q, Wang X, Wang D, Yang L. Resveratrol alleviates ischemia/reperfusion injury of diabetic myocardium via inducing autophagy. Exp Ther Med 2019; 18:2719-2725. [PMID: 31555372 DOI: 10.3892/etm.2019.7846] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 06/13/2019] [Indexed: 12/23/2022] Open
Abstract
The rising incidence and complications of diabetes constitutes a major public health issue. The mortality rate of diabetes-induced myocardial ischemia/reperfusion (I/R) injury is significantly elevated. Resveratrol (RSV) is a naturally occurring polyphenol considered to be a potent cardioprotective compound. The aim of the present study was to explore the function and molecular mechanism of RSV on diabetes-induced myocardial I/R injury. Left anterior descending coronary artery ligation was performed to stimulate myocardial I/R injury in streptozotocin-induced diabetic rats. Heart electrical activity was monitored through an electrocardiogram to confirm successful models. The myocardial infarct volume was detected via 2,3,5-triphenyltetrazolium chloride staining. Western blotting was employed to examine the levels of autophagy markers. It was found that the injection of RSV mitigated the ischemia- or I/R injury-induced myocardial damage on hemodynamic function and infarct size, but the autophagy inhibitor 3-methyladenine significantly blocked the function of RSV. Furthermore, the application of RSV significantly enhanced the expression of Beclin-1 and LC-3II but inhibited the serum levels of tumor necrosis factor-α and interleukin-6. These findings revealed an alleviating effect of RSV on diabetes-induced myocardial I/R injury and provided new evidence for the successful application of RSV on the diabetic myocardium.
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Affiliation(s)
- Xianfeng Qu
- Department of Anesthesiology, Municipal Hospital of Taizhou, Taizhou, Zhejiang 318000, P.R. China
| | - Xiao Chen
- Department of Anesthesiology, Municipal Hospital of Taizhou, Taizhou, Zhejiang 318000, P.R. China
| | - Qingqing Shi
- Department of Anesthesiology, Municipal Hospital of Taizhou, Taizhou, Zhejiang 318000, P.R. China
| | - Xiaofei Wang
- Department of Anesthesiology, Municipal Hospital of Taizhou, Taizhou, Zhejiang 318000, P.R. China
| | - Dongguo Wang
- Clinical Laboratory, Municipal Hospital of Taizhou, Taizhou, Zhejiang 318000, P.R. China
| | - Li Yang
- Department of Anesthesiology, Municipal Hospital of Taizhou, Taizhou, Zhejiang 318000, P.R. China
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18
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Kamau F, Strijdom H, Mwangi P, Blackhurst D, Imperial E, Salie R. Antiretroviral drug-induced endothelial dysfunction is improved by dual PPARα/γ stimulation in obesity. Vascul Pharmacol 2019; 121:106577. [PMID: 31284000 DOI: 10.1016/j.vph.2019.106577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/15/2019] [Accepted: 07/03/2019] [Indexed: 12/22/2022]
Abstract
Obesity rates are rising in HIV-infected populations; however, the putative role of highly active antiretroviral therapy (HAART) in the development of endothelial and cardiovascular derangements in the presence of pre-existing overweight/obesity is unclear. Although dual peroxisome proliferator-activated receptors-alpha/gamma (PPARα/γ) stimulation mitigates HAART-induced metabolic dysfunction, vascular effects are unresolved. To investigate whether HAART induces vascular dysfunction in obesity and to explore the underlying mechanisms of PPARα/γ stimulation, male Wistar rats were placed on a high-calorie diet for 16 weeks. After 10 weeks, HAART (lopinavir/ritonavir, azidothymidine/lamivudine) with/without PPARα/γ agonist, Saroglitazar, was administered daily for six weeks. Excised thoracic aorta rings were subjected to isometric tension studies and Western blot measurements. HAART+Saroglitazar-treated obese animals recorded lower adiposity indices (4.3 ± 0.5%) vs. HAART only-treated obese rats (5.6 ± 0.3%; p < .01). Maximum acetylcholine-induced vasorelaxation (Rmax), was lower in obese+HAART group (76.10 ± 3.58%) vs. obese control (101.40 ± 4.75%; p < .01). However, Rmax was improved in obese+ HAART+Saroglitazar (101.00 ± 3.12%) vs. obese+HAART rats (p < .001). The mean LogEC50 was improved in obese+HAART+Saroglitazar vs. obese+HAART group; p = .003. Improved endothelial function in obese+ HAART+Saroglitazar group was associated with upregulation of eNOS, PKB/Akt and downregulated p22-phox expression vs. obese+HAART group. Therefore, PPARα/γ stimulation attenuated HAART-induced endothelial dysfunction by upregulating vasoprotective eNOS, PKB/Akt signaling and downregulating pro-oxidative p22-phox expression.
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Affiliation(s)
- Festus Kamau
- Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Cape Town 8000, South Africa.
| | - Hans Strijdom
- Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Cape Town 8000, South Africa.
| | - Peter Mwangi
- Department of Medical Physiology, School of Medicine, College of Health Sciences, University of Nairobi, P.O. Box 30197, 00100 Nairobi, Kenya.
| | - Dee Blackhurst
- Division of Chemical Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town 7925, South Africa.
| | - Emiliana Imperial
- Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Cape Town 8000, South Africa.
| | - Ruduwaan Salie
- Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Cape Town 8000, South Africa; The Biomedical Research and Innovation Platform (BRIP), South African Medical Research Council, PO Box 19070, Tygerberg 7505, South Africa.
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19
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Zhou Y, Chen X, Qu N, Zhang B, Xia C. Chondroprotection of PPARα activation by WY14643 via autophagy involving Akt and ERK in LPS-treated mouse chondrocytes and osteoarthritis model. J Cell Mol Med 2019; 23:2782-2793. [PMID: 30729704 PMCID: PMC6433667 DOI: 10.1111/jcmm.14184] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 12/08/2018] [Accepted: 01/10/2019] [Indexed: 12/18/2022] Open
Abstract
Autophagy maintains cellular homoeostasis. The enhancement of autophagy in chondrocytes could prevent osteoarthritis (OA) progression in articular cartilage. Peroxisome proliferator-activated receptor α (PPARα) activation may also protect articular chondrocytes against cartilage degradation in OA. However, whether the protective effect of activated PPARα is associated with autophagy induction in chondrocytes is not determined. In this study, we investigated the effect of PPARα activation by its agonist, WY14643, on the protein expression level of Aggrecan and ADAMTS5, and the protein expression level of autophagy biomarkers, including LC3B and P62, using Western blotting analysis in isolated mouse chondrocytes pre-treated with lipopolysaccharides (LPS, mimicking OA chondrocytes) with or without the autophagy inhibitor chloroquine diphosphate salt. Furthermore, Akt and ERK phosphorylation was detected in LPS-treated chondrocytes in response to WY14643. In addition, the effect of intra-articularly injected WY14643 on articular cartilage in a mouse OA model established by the destabilization of the medial meniscus was assessed using the Osteoarthritis Research Society International (OARSI) histopathology assessment system, along with the detection of Aggrecan, ADAMTS5, LC3B and P62 protein levels using immunohistochemistry assay. The results indicated that PPARα activation by WY14643 promoted proteoglycan synthesis by autophagy enhancement in OA chondrocytes in vivo and in vitro concomitant with the elevation of Akt and ERK phosphorylation. Therefore, autophagy could contribute to the chondroprotection of PPARα activation by WY14643, with the implication that PPARα activation by WY14643 may be a potential approach for OA therapy.
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Affiliation(s)
- Yang Zhou
- Zhongshan Hospital, Xiamen University, Xiamen, Fujian, China
| | - Xiaolei Chen
- Zhongshan Hospital, Xiamen University, Xiamen, Fujian, China
| | - Ning Qu
- School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Bing Zhang
- School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Chun Xia
- Zhongshan Hospital, Xiamen University, Xiamen, Fujian, China
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20
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Schafer C, Moore V, Dasgupta N, Javadov S, James JF, Glukhov AI, Strauss AW, Khuchua Z. The Effects of PPAR Stimulation on Cardiac Metabolic Pathways in Barth Syndrome Mice. Front Pharmacol 2018; 9:318. [PMID: 29695963 PMCID: PMC5904206 DOI: 10.3389/fphar.2018.00318] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 03/20/2018] [Indexed: 12/20/2022] Open
Abstract
Aim: Tafazzin knockdown (TazKD) in mice is widely used to create an experimental model of Barth syndrome (BTHS) that exhibits dilated cardiomyopathy and impaired exercise capacity. Peroxisome proliferator-activated receptors (PPARs) are a group of nuclear receptor proteins that play essential roles as transcription factors in the regulation of carbohydrate, lipid, and protein metabolism. We hypothesized that the activation of PPAR signaling with PPAR agonist bezafibrate (BF) may ameliorate impaired cardiac and skeletal muscle function in TazKD mice. This study examined the effects of BF on cardiac function, exercise capacity, and metabolic status in the heart of TazKD mice. Additionally, we elucidated the impact of PPAR activation on molecular pathways in TazKD hearts. Methods: BF (0.05% w/w) was given to TazKD mice with rodent chow. Cardiac function in wild type-, TazKD-, and BF-treated TazKD mice was evaluated by echocardiography. Exercise capacity was evaluated by exercising mice on the treadmill until exhaustion. The impact of BF on metabolic pathways was evaluated by analyzing the total transcriptome of the heart by RNA sequencing. Results: The uptake of BF during a 4-month period at a clinically relevant dose effectively protected the cardiac left ventricular systolic function in TazKD mice. BF alone did not improve the exercise capacity however, in combination with everyday voluntary running on the running wheel BF significantly ameliorated the impaired exercise capacity in TazKD mice. Analysis of cardiac transcriptome revealed that BF upregulated PPAR downstream target genes involved in a wide spectrum of metabolic (energy and protein) pathways as well as chromatin modification and RNA processing. In addition, the Ostn gene, which encodes the metabolic hormone musclin, is highly induced in TazKD myocardium and human failing hearts, likely as a compensatory response to diminished bioenergetic homeostasis in cardiomyocytes. Conclusion: The PPAR agonist BF at a clinically relevant dose has the therapeutic potential to attenuate cardiac dysfunction, and possibly exercise intolerance in BTHS. The role of musclin in the failing heart should be further investigated.
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Affiliation(s)
- Caitlin Schafer
- The Heart Institute, Cincinnati Children's Research Foundation, Cincinnati, OH, United States
| | - Vicky Moore
- The Heart Institute, Cincinnati Children's Research Foundation, Cincinnati, OH, United States
| | - Nupur Dasgupta
- The Division of Human Genetics, Department of Pediatrics, University of Cincinnati College of Medicine and Cincinnati Children's Research Foundation, Cincinnati, OH, United States
| | - Sabzali Javadov
- Department of Physiology, School of Medicine, University of Puerto Rico, San Juan, Puerto Rico
| | - Jeanne F James
- The Heart Institute, Cincinnati Children's Research Foundation, Cincinnati, OH, United States.,Medical College of Wisconsin, Milwaukee, WI, United States
| | - Alexander I Glukhov
- Department of Biochemistry, I.M. Sechenov First Moscow State Medical University, Moscow, Russia.,Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Arnold W Strauss
- The Heart Institute, Cincinnati Children's Research Foundation, Cincinnati, OH, United States
| | - Zaza Khuchua
- The Heart Institute, Cincinnati Children's Research Foundation, Cincinnati, OH, United States.,Department of Biochemistry, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
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21
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Zhou T, Prather ER, Garrison DE, Zuo L. Interplay between ROS and Antioxidants during Ischemia-Reperfusion Injuries in Cardiac and Skeletal Muscle. Int J Mol Sci 2018; 19:ijms19020417. [PMID: 29385043 PMCID: PMC5855639 DOI: 10.3390/ijms19020417] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 01/14/2018] [Accepted: 01/21/2018] [Indexed: 12/16/2022] Open
Abstract
Ischemia reperfusion (IR), present in myocardial infarction or extremity injuries, is a major clinical issue and leads to substantial tissue damage. Molecular mechanisms underlying IR injury in striated muscles involve the production of reactive oxygen species (ROS). Excessive ROS accumulation results in cellular oxidative stress, mitochondrial dysfunction, and initiation of cell death by activation of the mitochondrial permeability transition pore. Elevated ROS levels can also decrease myofibrillar Ca2+ sensitivity, thereby compromising muscle contractile function. Low levels of ROS can act as signaling molecules involved in the protective pathways of ischemic preconditioning (IPC). By scavenging ROS, antioxidant therapies aim to prevent IR injuries with positive treatment outcomes. Novel therapies such as postconditioning and pharmacological interventions that target IPC pathways hold great potential in attenuating IR injuries. Factors such as aging and diabetes could have a significant impact on the severity of IR injuries. The current paper aims to provide a comprehensive review on the multifaceted roles of ROS in IR injuries, with a focus on cardiac and skeletal muscle, as well as recent advancement in ROS-related therapies.
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Affiliation(s)
- Tingyang Zhou
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
- Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH 43210, USA.
| | - Evan R Prather
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - Davis E Garrison
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - Li Zuo
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
- Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH 43210, USA.
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22
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Russell J, Du Toit EF, Peart JN, Patel HH, Headrick JP. Myocyte membrane and microdomain modifications in diabetes: determinants of ischemic tolerance and cardioprotection. Cardiovasc Diabetol 2017; 16:155. [PMID: 29202762 PMCID: PMC5716308 DOI: 10.1186/s12933-017-0638-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 11/22/2017] [Indexed: 02/06/2023] Open
Abstract
Cardiovascular disease, predominantly ischemic heart disease (IHD), is the leading cause of death in diabetes mellitus (DM). In addition to eliciting cardiomyopathy, DM induces a ‘wicked triumvirate’: (i) increasing the risk and incidence of IHD and myocardial ischemia; (ii) decreasing myocardial tolerance to ischemia–reperfusion (I–R) injury; and (iii) inhibiting or eliminating responses to cardioprotective stimuli. Changes in ischemic tolerance and cardioprotective signaling may contribute to substantially higher mortality and morbidity following ischemic insult in DM patients. Among the diverse mechanisms implicated in diabetic impairment of ischemic tolerance and cardioprotection, changes in sarcolemmal makeup may play an overarching role and are considered in detail in the current review. Observations predominantly in animal models reveal DM-dependent changes in membrane lipid composition (cholesterol and triglyceride accumulation, fatty acid saturation vs. reduced desaturation, phospholipid remodeling) that contribute to modulation of caveolar domains, gap junctions and T-tubules. These modifications influence sarcolemmal biophysical properties, receptor and phospholipid signaling, ion channel and transporter functions, contributing to contractile and electrophysiological dysfunction, cardiomyopathy, ischemic intolerance and suppression of protective signaling. A better understanding of these sarcolemmal abnormalities in types I and II DM (T1DM, T2DM) can inform approaches to limiting cardiomyopathy, associated IHD and their consequences. Key knowledge gaps include details of sarcolemmal changes in models of T2DM, temporal patterns of lipid, microdomain and T-tubule changes during disease development, and the precise impacts of these diverse sarcolemmal modifications. Importantly, exercise, dietary, pharmacological and gene approaches have potential for improving sarcolemmal makeup, and thus myocyte function and stress-resistance in this ubiquitous metabolic disorder.
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Affiliation(s)
- Jake Russell
- Menzies Health Institute Queensland, Griffith University, Southport, QLD, Australia
| | - Eugene F Du Toit
- Menzies Health Institute Queensland, Griffith University, Southport, QLD, Australia
| | - Jason N Peart
- Menzies Health Institute Queensland, Griffith University, Southport, QLD, Australia
| | - Hemal H Patel
- VA San Diego Healthcare System and Department of Anesthesiology, University of California San Diego, San Diego, USA
| | - John P Headrick
- Menzies Health Institute Queensland, Griffith University, Southport, QLD, Australia. .,School of Medical Science, Griffith University, Southport, QLD, 4217, Australia.
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23
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Biochemical targets of drugs mitigating oxidative stress via redox-independent mechanisms. Biochem Soc Trans 2017; 45:1225-1252. [PMID: 29101309 DOI: 10.1042/bst20160473] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 09/24/2017] [Accepted: 09/26/2017] [Indexed: 12/13/2022]
Abstract
Acute or chronic oxidative stress plays an important role in many pathologies. Two opposite approaches are typically used to prevent the damage induced by reactive oxygen and nitrogen species (RONS), namely treatment either with antioxidants or with weak oxidants that up-regulate endogenous antioxidant mechanisms. This review discusses options for the third pharmacological approach, namely amelioration of oxidative stress by 'redox-inert' compounds, which do not inactivate RONS but either inhibit the basic mechanisms leading to their formation (i.e. inflammation) or help cells to cope with their toxic action. The present study describes biochemical targets of many drugs mitigating acute oxidative stress in animal models of ischemia-reperfusion injury or N-acetyl-p-aminophenol overdose. In addition to the pro-inflammatory molecules, the targets of mitigating drugs include protein kinases and transcription factors involved in regulation of energy metabolism and cell life/death balance, proteins regulating mitochondrial permeability transition, proteins involved in the endoplasmic reticulum stress and unfolded protein response, nuclear receptors such as peroxisome proliferator-activated receptors, and isoprenoid synthesis. The data may help in identification of oxidative stress mitigators that will be effective in human disease on top of the current standard of care.
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24
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Ajith TA, Jayakumar TG. Peroxisome proliferator-activated receptors in cardiac energy metabolism and cardiovascular disease. Clin Exp Pharmacol Physiol 2017; 43:649-58. [PMID: 27115677 DOI: 10.1111/1440-1681.12579] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 03/28/2016] [Accepted: 04/08/2016] [Indexed: 11/30/2022]
Abstract
Cardiomyocytes mainly depend on energy produced from the oxidation of fatty acids and mitochondrial oxidative phosphorylation. Shortage of energy or excessive fat accumulation can lead to cardiac disorders. High saturated fat intake and a sedentary life style have a major influence in the development of cardiovascular disease (CVD). Peroxisome proliferator-activated receptors (PPARs), one of the nuclear receptor super family members, play critical role in the metabolism of lipids by regulating their oxidation and storage. Furthermore, they are involved in glucose homeostasis as well. PPARs, mainly alpha (α) and beta/delta (β/δ), have a significant effect on the lipid metabolism and anti-inflammation in endothelial cells (ECs), vascular smooth muscle cells, and also in cardiomyocytes. Pro-inflammatory cytokines, mainly tumour necrosis factor-α, released at the site of inflammation in the sub-ECs of coronary arteries can inactivate the PPARs which can eventually lead to decreased energy production in the myocardium. Various synthetic ligands of PPAR-α and β/δ have many favourable effects in modulating the vascular diseases and heart failure. Despite the adverse effects from therapy using PPAR- gamma ligands, several laboratories are now focused on synthesizing partial activators which may combine their beneficial effects with lowering of undesirable side effects. This review discusses the role of isoforms of PPAR in the cardiomyocytes energy balance and CVD. The knowledge will help in the synthesis of ligands for their partial activation in order to render energy balance and protection from CVD.
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25
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Slezak J, Kura B, Babal P, Barancik M, Ferko M, Frimmel K, Kalocayova B, Kukreja RC, Lazou A, Mezesova L, Okruhlicova L, Ravingerova T, Singal PK, Szeiffova Bacova B, Viczenczova C, Vrbjar N, Tribulova N. Potential markers and metabolic processes involved in the mechanism of radiation-induced heart injury. Can J Physiol Pharmacol 2017; 95:1190-1203. [PMID: 28750189 DOI: 10.1139/cjpp-2017-0121] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Irradiation of normal tissues leads to acute increase in reactive oxygen/nitrogen species that serve as intra- and inter-cellular signaling to alter cell and tissue function. In the case of chest irradiation, it can affect the heart, blood vessels, and lungs, with consequent tissue remodelation and adverse side effects and symptoms. This complex process is orchestrated by a large number of interacting molecular signals, including cytokines, chemokines, and growth factors. Inflammation, endothelial cell dysfunction, thrombogenesis, organ dysfunction, and ultimate failing of the heart occur as a pathological entity - "radiation-induced heart disease" (RIHD) that is major source of morbidity and mortality. The purpose of this review is to bring insights into the basic mechanisms of RIHD that may lead to the identification of targets for intervention in the radiotherapy side effect. Studies of authors also provide knowledge about how to select targeted drugs or biological molecules to modify the progression of radiation damage in the heart. New prospective studies are needed to validate that assessed factors and changes are useful as early markers of cardiac damage.
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Affiliation(s)
- Jan Slezak
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
| | - Branislav Kura
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
| | - Pavel Babal
- b Institute of Pathology, Medical Faculty of Comenius University, Bratislava, Slovakia
| | - Miroslav Barancik
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
| | - Miroslav Ferko
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
| | - Karel Frimmel
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
| | - Barbora Kalocayova
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
| | - Rakesh C Kukreja
- c Division of Cardiology, Medical College of Virginia, Virginia Commonwealth University, Richmond, VA, USA
| | - Antigone Lazou
- d School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Lucia Mezesova
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
| | - Ludmila Okruhlicova
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
| | - Tanya Ravingerova
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
| | - Pawan K Singal
- e University of Manitoba, St. Boniface Research Centre, Winnipeg, MB R2H 2A6, Canada
| | | | - Csilla Viczenczova
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
| | - Norbert Vrbjar
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
| | - Narcis Tribulova
- a Institute for Heart Research, Slovak Academy of Sciences, 840 05 Bratislava, Slovakia
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26
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Ravingerová T, Farkašová V, Griecsová L, Muráriková M, Carnická S, Lonek L, Ferko M, Slezak J, Zálešák M, Adameova A, Khandelwal VKM, Lazou A, Kolar F. Noninvasive approach to mend the broken heart: Is "remote conditioning" a promising strategy for application in humans? Can J Physiol Pharmacol 2017; 95:1204-1212. [PMID: 28683229 DOI: 10.1139/cjpp-2017-0200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Currently, there are no satisfactory interventions to protect the heart against the detrimental effects of ischemia-reperfusion injury. Although ischemic preconditioning (PC) is the most powerful form of intrinsic cardioprotection, its application in humans is limited to planned interventions, due to its short duration and technical requirements. However, many organs/tissues are capable of producing "remote" PC (RPC) when subjected to brief bouts of ischemia-reperfusion. RPC was first described in the heart where brief ischemia in one territory led to protection in other area. Later on, RPC started to be used in patients with acute myocardial infarction, albeit with ambiguous results. It is hypothesized that the connection between the signal triggered in remote organ and protection induced in the heart can be mediated by humoral and neural pathways, as well as via systemic response to short sublethal ischemia. However, although RPC has a potentially important clinical role, our understanding of the mechanistic pathways linking the local stimulus to the remote organ remains incomplete. Nevertheless, RPC appears as a cost-effective and easily performed intervention. Elucidation of protective mechanisms activated in the remote organ may have therapeutic and diagnostic implications in the management of myocardial ischemia and lead to development of pharmacological RPC mimetics.
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Affiliation(s)
- Táňa Ravingerová
- a Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Veronika Farkašová
- a Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Lucia Griecsová
- a Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Martina Muráriková
- a Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Slavka Carnická
- a Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovakia
| | - L'ubomír Lonek
- a Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Miroslav Ferko
- a Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Jan Slezak
- a Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Marek Zálešák
- a Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Adriana Adameova
- b Faculty of Pharmacy, Comenius University, Bratislava, Slovakia
| | | | - Antigone Lazou
- d School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Frantisek Kolar
- e Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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27
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Arrhythmia Vulnerability in Diabetic Cardiac Tissue is Species-Dependent: Effects of I KATP, Uncoupling, and Connexin Lateralization. Cardiovasc Eng Technol 2017; 8:527-538. [PMID: 28656565 DOI: 10.1007/s13239-017-0315-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 06/22/2017] [Indexed: 10/19/2022]
Abstract
Amongst the complications of diabetes is arrhythmia, the risk of which depends on multiple factors. This study was designed to investigate several factors, including the effects of ATP-sensitive potassium current, lateralized connexins, and gap junction uncoupling. ATP-sensitive potassium channel (I KATP) opening is caused by ischemia, which can occur in diabetic or non-diabetic hearts. I KATP opening was simulated in this work to determine if the risk of ischemia-induced arrhythmias is affected by diabetes. Simulations were performed using healthy and diabetic models of rat and rabbit ventricle. Results showed that the diabetic rat model is less vulnerable to reentrant arrhythmia than the healthy rat model. The diabetic rabbit model was more vulnerable to reentrant arrhythmia than the healthy rabbit model. In both rabbit models, the vulnerability increased as the gap junctional coupling decreased. Opening of I KATP resulted in larger window of vulnerability. Conduction reserve was simulated based on 1D simulations for both rat and rabbit models. There was no difference between rat and rabbit conduction reserve. Our results showed that the simulation results are model-dependent, i.e., results from the rabbit model are similar to human clinical data, while the results from the rat model contradict human clinical observations, suggesting a significant species-dependence in arrhythmia vulnerability in the diabetic heart.
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28
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Neuhaus W, Krämer T, Neuhoff A, Gölz C, Thal SC, Förster CY. Multifaceted Mechanisms of WY-14643 to Stabilize the Blood-Brain Barrier in a Model of Traumatic Brain Injury. Front Mol Neurosci 2017; 10:149. [PMID: 28603485 PMCID: PMC5445138 DOI: 10.3389/fnmol.2017.00149] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 05/03/2017] [Indexed: 12/27/2022] Open
Abstract
The blood-brain barrier (BBB) is damaged during ischemic insults such as traumatic brain injury or stroke. This contributes to vasogenic edema formation and deteriorate disease outcomes. Enormous efforts are pursued to understand underlying mechanisms of ischemic insults and develop novel therapeutic strategies. In the present study the effects of PPARα agonist WY-14643 were investigated to prevent BBB breakdown and reduce edema formation. WY-14643 inhibited barrier damage in a mouse BBB in vitro model of traumatic brain injury based on oxygen/glucose deprivation in a concentration dependent manner. This was linked to changes of the localization of tight junction proteins. Furthermore, WY-14643 altered phosphorylation of kinases ERK1/2, p38, and SAPK/JNK and was able to inhibit proteosomal activity. Moreover, addition of WY-14643 upregulated PAI-1 leading to decreased t-PA activity. Mouse in vivo experiments showed significantly decreased edema formation in a controlled cortical impact model of traumatic brain injury after WY-14643 application, which was not found in PAI-1 knockout mice. Generally, data suggested that WY-14643 induced cellular responses which were dependent as well as independent from PPARα mediated transcription. In conclusion, novel mechanisms of a PPARα agonist were elucidated to attenuate BBB breakdown during traumatic brain injury in vitro.
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Affiliation(s)
- Winfried Neuhaus
- Competence Unit Molecular Diagnostics, Competence Center Health and Bioresources, AIT Austrian Institute of Technology (AIT) GmbHVienna, Austria
| | - Tobias Krämer
- Department of Anesthesiology, Medical Center of Johannes Gutenberg University of MainzMainz, Germany
| | - Anja Neuhoff
- Department of Anesthesia and Critical Care, Center of Operative Medicine, University Hospital WürzburgWürzburg, Germany
| | - Christina Gölz
- Department of Anesthesiology, Medical Center of Johannes Gutenberg University of MainzMainz, Germany
| | - Serge C Thal
- Department of Anesthesiology, Medical Center of Johannes Gutenberg University of MainzMainz, Germany
| | - Carola Y Förster
- Department of Anesthesia and Critical Care, Center of Operative Medicine, University Hospital WürzburgWürzburg, Germany
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Chen Y, Chen H, Birnbaum Y, Nanhwan MK, Bajaj M, Ye Y, Qian J. Aleglitazar, a dual peroxisome proliferator-activated receptor-α and -γ agonist, protects cardiomyocytes against the adverse effects of hyperglycaemia. Diab Vasc Dis Res 2017; 14:152-162. [PMID: 28111985 PMCID: PMC5305042 DOI: 10.1177/1479164116679081] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
PURPOSE To assess the effects of Aleglitazar on hyperglycaemia-induced apoptosis. METHODS We incubated human cardiomyocytes, cardiomyocytes from cardiac-specific peroxisome proliferator-activated receptor-γ knockout or wild-type mice in normoglycaemic or hyperglycaemic conditions (glucose 25 mM). Cells were treated with different concentrations of Aleglitazar for 48 h. We measured viability, apoptosis, caspase-3 activity, cytochrome-C release, total antioxidant capacity and reactive oxygen species formation in the treated cardiomyocytes. Human cardiomyocytes were transfected with short interfering RNA against peroxisome proliferator-activated receptor-α or peroxisome proliferator-activated receptor-γ. RESULTS Aleglitazar attenuated hyperglycaemia-induced apoptosis, caspase-3 activity and cytochrome-C release and increased viability in human cardiomyocyte, cardiomyocytes from cardiac-specific peroxisome proliferator-activated receptor-γ knockout and wild-type mice. Hyperglycaemia reduced the antioxidant capacity and Aleglitazar significantly blunted this effect. Hyperglycaemia-induced reactive oxygen species production was attenuated by Aleglitazar in both human cardiomyocyte and wild-type mice cardiomyocytes. Aleglitazar improved cell viability in cells exposed to hyperglycaemia. The protective effect was partially blocked by short interfering RNA against peroxisome proliferator-activated receptor-α alone and short interfering RNA against peroxisome proliferator-activated receptor-γ alone and completely blocked by short interfering RNA to both peroxisome proliferator-activated receptor-α and peroxisome proliferator-activated receptor-γ. CONCLUSION Aleglitazar protects cardiomyocytes against hyperglycaemia-induced apoptosis by combined activation of both peroxisome proliferator-activated receptor-α and peroxisome proliferator-activated receptor-γ in a short-term vitro model.
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Affiliation(s)
- Yan Chen
- Department of Anesthesiology, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Hongmei Chen
- Department of Anesthesiology, Kunming Tongren Hospital, Kunming, China
| | - Yochai Birnbaum
- Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Manjyot K Nanhwan
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
| | - Mandeep Bajaj
- Section of Endocrinology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Yumei Ye
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
| | - Jinqiao Qian
- Department of Anesthesiology, The First Affiliated Hospital of Kunming Medical University, Kunming, China
- Jinqiao Qian, Department of Anesthesiology, The First Affiliated Hospital of Kunming Medical University, #295 Xichang Road, Kunming 650032, Yunnan Province, China.
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30
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Qian J, Chen H, Birnbaum Y, Nanhwan MK, Bajaj M, Ye Y. Aleglitazar, a Balanced Dual PPARα and -γ Agonist, Protects the Heart Against Ischemia-Reperfusion Injury. Cardiovasc Drugs Ther 2017; 30:129-41. [PMID: 26861490 DOI: 10.1007/s10557-016-6650-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
PURPOSE To evaluate whether aleglitazar (Ale), a dual PPARα/γ agonist, has additive effects on myocardial protection against ischemia-reperfusion injury. METHODS Human cardiomyocytes (HCMs), cardiomyocytes from cardiac-specific PPARγ knockout (MCM-PPARγ (CKO) ) or wild type (MCM-WT) mice were incubated with different concentrations of Ale, and subjected to simulated ischemia-reperfusion (SIR) or normoxic conditions (NSIR). Cell viability, apoptosis and caspase-3 activity were determined. HCMs were transfected with siRNA against PPARα (siPPARα) or PPARγ (siPPARγ) followed by incubation with Ale. PPARα/γ DNA binding capacity was measured. Cell viability, apoptosis and levels of P-AKT and P-eNOS were assessed. Infarct size following 30 min coronary artery occlusion and 24 h reperfusion were assessed in WT and db/db diabetic mice following 3-day pretreatment with vehicle, Ale or glimeperide. RESULTS Ale (at concentrations of 150-600 nM) increased cell viability and reduced apoptosis in HCMs, MCM-WT and MCM-PPAR (CKO) exposed to SIR. In HCM, the protective effect was partially blocked by siPPARα alone or siPPARγ alone, and completely blocked by siPPARα+siPPARγ. Ale increased P-Akt/P-eNOS in HCMs. P-Akt or P-eNOS levels were decreased when PPARα alone, PPARγ alone and especially when both were knocked down. Peritoneal GTTs revealed that db/db mice had developed impaired glucose tolerance and insulin sensitivity, which were normalized by Ale or glimepiride treatment. Ale, but not glimepiride, limited infarct size in both WT and diabetic mice after ischemia-reperfusion. CONCLUSIONS Ale protects against myocardial apoptosis caused by hypoxia-reoxygenation in vitro and reduces infarct size in vivo.
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Affiliation(s)
- Jinqiao Qian
- Department of Anesthesiology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, China.
| | - Hongmei Chen
- Department of Anesthesiology, Kunming Tongren Hospital, Kunming, Yunnan Province, China
| | - Yochai Birnbaum
- Department of Medicine, Section of Cardiology, Baylor College of Medicine, One Baylor Plaza, MS BCM620, Houston, TX, USA.,Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX, USA
| | - Manjyot K Nanhwan
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX, USA
| | - Mandeep Bajaj
- Department of Medicine, Section of Endocrinology, Baylor College of Medicine, One Baylor Plaza, Houston, TX, USA
| | - Yumei Ye
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX, USA
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31
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Tanaka S, Hosogi S, Sawabe Y, Shimamoto C, Matsumura H, Inui T, Marunaka Y, Nakahari T. PPARα induced NOS1 phosphorylation via PI3K/Akt in guinea pig antral mucous cells: NO-enhancement in Ca(2+)-regulated exocytosis. Biomed Res 2017; 37:167-78. [PMID: 27356604 DOI: 10.2220/biomedres.37.167] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A PPARα (peroxisome proliferation activation receptor α) agonist (GW7647) activates nitric oxide synthase 1 (NOS1) to produce NO leading to cGMP accumulation in antral mucous cells. In this study, we examined how PPARα activates NOS1. The NO production stimulated by GW7647 was suppressed by inhibitors of PI3K (wortmannin) and Akt (AKT 1/2 Kinase Inhibitor, AKT-inh), although it was also suppressed by the inhibitors of PPARα (GW6471) and NOS1 (N-PLA). GW7647 enhanced the ACh (acetylcholine)-stimulated exocytosis (Ca(2+)-regulated exocytosis) mediated via NO, which was abolished by GW6471, N-PLA, wortmannin, and AKT-inh. The Western blotting revealed that GW7647 phosphorylates NOS1 via phosphorylation of PI3K/Akt in antral mucous cells. The immunofluorescence examinations demonstrated that PPARα existing with NOS1 co-localizes with PI3K and Akt in the cytoplasm of antral mucous cells. ACh alone and AACOCF3, an analogue of arachidonic acid (AA), induced the NOS1 phosphorylation via PI3K/Akt to produce NO, which was inhibited by GW6471. Since AA is a natural ligand for PPARα, ACh stimulates PPARα probably via AA. In conclusion, PPARα activates NOS1 via PI3K/Akt phosphorylation to produce NO in antral mucous cells during ACh stimulation.
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Affiliation(s)
- Saori Tanaka
- Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences
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32
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Desrois M, Lan C, Movassat J, Bernard M. Reduced up-regulation of the nitric oxide pathway and impaired endothelial and smooth muscle functions in the female type 2 diabetic goto-kakizaki rat heart. Nutr Metab (Lond) 2017; 14:6. [PMID: 28101124 PMCID: PMC5237314 DOI: 10.1186/s12986-016-0157-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 12/25/2016] [Indexed: 02/07/2023] Open
Abstract
Background Type 2 diabetes is associated with greater relative risk of cardiovascular diseases in women than in men, which is not well understood. Consequently, we have investigated if male and female displayed differences in cardiac function, energy metabolism, and endothelial function which could contribute to increased cardiovascular complications in type 2 diabetic female. Methods Male and female Control and type 2 diabetic Goto-Kakizaki (GK) isolated rat hearts were perfused during 28 min with a physiological buffer before freeze-clamping for biochemical assays. High energy phosphate compounds and intracellular pH were followed using 31P magnetic resonance spectroscopy with simultaneous measurement of contractile function. Nitric oxide (NO) pathway and endothelium-dependent and independent vasodilatations were measured as indexes of endothelial function. Results were analyzed via two-way ANOVA, p < 0.05 was considered as statistically significant. Results Myocardial function was impaired in male and female diabetic versus Control groups (p < 0.05) without modification of energy metabolism. Coronary flow was decreased in both diabetic versus Control groups but to a higher extent in female GK versus male GK rat hearts (p < 0.05). NO production was up-regulated in diabetic groups but to a less extent in female GK rat hearts (p < 0.05). Endothelium-dependent and independent vasodilatations were impaired in female GK rat compared with male GK (p < 0.05) and female Control (p < 0.05) rat hearts. Conclusions We reported here an endothelial damage characterized by a reduced up-regulation of the NO pathway and impaired endothelial and smooth muscle functions, and coronary flow rates in the female GK rat hearts while energy metabolism was normal. Whether these results are related to the higher risk of cardiovascular complications among type 2 diabetic female needs to be further elicited in the future. Electronic supplementary material The online version of this article (doi:10.1186/s12986-016-0157-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Martine Desrois
- Aix-Marseille Université, CNRS, CRMBM, Marseille, France ; Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR n°7339, Aix-Marseille Université, CNRS, Faculté de Medecine, 27 Bd Jean Moulin, Marseille Cedex 05, 13385 France
| | - Carole Lan
- Aix-Marseille Université, CNRS, CRMBM, Marseille, France
| | - Jamileh Movassat
- Université Paris-Diderot, CNRS, UMR 8251, Laboratoire de Biologie et Pathologie du Pancréas Endocrine (B2PE), Unité BFA, Paris, France
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Fenofibrate Therapy Restores Antioxidant Protection and Improves Myocardial Insulin Resistance in a Rat Model of Metabolic Syndrome and Myocardial Ischemia: The Role of Angiotensin II. Molecules 2016; 22:molecules22010031. [PMID: 28036029 PMCID: PMC6155612 DOI: 10.3390/molecules22010031] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/04/2016] [Accepted: 12/20/2016] [Indexed: 11/25/2022] Open
Abstract
Renin-angiotensin system (RAS) activation promotes oxidative stress which increases the risk of cardiac dysfunction in metabolic syndrome (MetS) and favors local insulin resistance. Fibrates regulate RAS improving MetS, type-2 diabetes and cardiovascular diseases. We studied the effect of fenofibrate treatment on the myocardic signaling pathway of Angiotensin II (Ang II)/Angiotensin II type 1 receptor (AT1) and its relationship with oxidative stress and myocardial insulin resistance in MetS rats under heart ischemia. Control and MetS rats were assigned to the following groups: (a) sham; (b) vehicle-treated myocardial infarction (MI) (MI-V); and (c) fenofibrate-treated myocardial infarction (MI-F). Treatment with fenofibrate significantly reduced triglycerides, non-high density lipoprotein cholesterol (non-HDL-C), insulin levels and insulin resistance index (HOMA-IR) in MetS animals. MetS and MI increased Ang II concentration and AT1 expression, favored myocardial oxidative stress (high levels of malondialdehyde, overexpression of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase 4 (NOX4), decreased total antioxidant capacity and diminished expression of superoxide dismutase (SOD)1, SOD2 and catalase) and inhibited expression of the insulin signaling cascade: phosphatidylinositol 3-kinase (PI3K)/protein kinase B (PkB, also known as Akt)/Glut-4/endothelial nitric oxide synthase (eNOS). In conclusion, fenofibrate treatment favors an antioxidant environment as a consequence of a reduction of the Ang II/AT1/NOX4 signaling pathway, reestablishing the cardiac insulin signaling pathway. This might optimize cardiac metabolism and improve the vasodilator function during myocardial ischemia.
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Fenofibrate plus Metformin Produces Cardioprotection in a Type 2 Diabetes and Acute Myocardial Infarction Model. PPAR Res 2016; 2016:8237264. [PMID: 27069466 PMCID: PMC4812489 DOI: 10.1155/2016/8237264] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 02/18/2016] [Indexed: 11/17/2022] Open
Abstract
We investigated whether fenofibrate, metformin, and their combination generate cardioprotection in a rat model of type 2 diabetes (T2D) and acute myocardial infarction (AMI). Streptozotocin-induced diabetic- (DB-) rats received 14 days of either vehicle, fenofibrate, metformin, or their combination and immediately after underwent myocardial ischemia/reperfusion (I/R). Fenofibrate plus metformin generated cardioprotection in a DBI/R model, reported as decreased coronary vascular resistance, compared to DBI/R-Vehicle, smaller infarct size, and increased cardiac work. The subchronic treatment with fenofibrate plus metformin increased, compared with DBI/R-Vehicle, total antioxidant capacity, manganese-dependent superoxide dismutase activity (MnSOD), guanosine triphosphate cyclohydrolase I (GTPCH-I) expression, tetrahydrobiopterin : dihydrobiopterin (BH4 : BH2) ratio, endothelial nitric oxide synthase (eNOS) activity, nitric oxide (NO) bioavailability, and decreased inducible NOS (iNOS) activity. These findings suggest that PPARα activation by fenofibrate + metformin, at low doses, generates cardioprotection in a rat model of T2D and AMI and may represent a novel treatment strategy to limit I/R injury in patients with T2D.
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Taguchi K, Hida M, Hasegawa M, Matsumoto T, Kobayashi T. Dietary polyphenol morin rescues endothelial dysfunction in a diabetic mouse model by activating the Akt/eNOS pathway. Mol Nutr Food Res 2015; 60:580-8. [DOI: 10.1002/mnfr.201500618] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 10/07/2015] [Accepted: 11/23/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Kumiko Taguchi
- Department of Physiology and Morphology, Institute of Medicinal Chemistry; Hoshi University; Tokyo Japan
| | - Mari Hida
- Department of Physiology and Morphology, Institute of Medicinal Chemistry; Hoshi University; Tokyo Japan
| | - Mami Hasegawa
- Department of Physiology and Morphology, Institute of Medicinal Chemistry; Hoshi University; Tokyo Japan
| | - Takayuki Matsumoto
- Department of Physiology and Morphology, Institute of Medicinal Chemistry; Hoshi University; Tokyo Japan
| | - Tsuneo Kobayashi
- Department of Physiology and Morphology, Institute of Medicinal Chemistry; Hoshi University; Tokyo Japan
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Protective Effect of Peroxisome Proliferator-Activated Receptor α Activation against Cardiac Ischemia-Reperfusion Injury Is Related to Upregulation of Uncoupling Protein-3. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2016:3539649. [PMID: 26770648 PMCID: PMC4685116 DOI: 10.1155/2016/3539649] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 08/17/2015] [Accepted: 08/25/2015] [Indexed: 11/17/2022]
Abstract
Activation of peroxisome proliferator-activated receptor α (PPARα) confers cardioprotection, while its mechanism remains elusive. We investigated the protective effect of PPARα activation against cardiac ischemia-reperfusion injury in terms of the expression of uncoupling protein (UCP). Myocardial infarct size and UCP expression were measured in rats treated with WY-14643 20 mg/kg, a PPARα ligand, or vehicle. WY-14643 increased UCP3 expression in vivo. Myocardial infarct size was decreased in the WY-14643 group (76 ± 8% versus 42 ± 12%, P<0.05). During reperfusion, the incidence of arrhythmia was higher in the control group compared with the WY-14643 group (9/10 versus 3/10, P<0.05). H9c2 cells were incubated for 24 h with WY-14643 or vehicle. WY-14643 increased UCP3 expression in H9c2 cells. WY-14643 decreased hypoxia-stimulated ROS production. Cells treated with WY-14643 were more resistant to hypoxia-reoxygenation than the untreated cells. Knocking-down UCP3 by siRNA prevented WY-14643 from attenuating the production of ROS. UCP3 siRNA abolished the effect of WY-14643 on cell viability against hypoxia-reoxygenation. In summary, administration of PPARα agonist WY-14643 mitigated the extent of myocardial infarction and incidence of reperfusion-induced arrhythmia. PPARα activation conferred cytoprotective effect against hypoxia-reoxygenation. Associated mechanisms involved increased UCP3 expression and resultant attenuation of ROS production.
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LI XIAOBIN, QI ZHONGHUA, ZHAO LONGSHAN, YU ZHAN. Astaxanthin reduces type 2 diabetic-associated cognitive decline in rats via activation of PI3K/Akt and attenuation of oxidative stress. Mol Med Rep 2015; 13:973-9. [DOI: 10.3892/mmr.2015.4615] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 06/30/2015] [Indexed: 11/06/2022] Open
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Korkmaz-Icöz S, Vater A, Li S, Lehner A, Radovits T, Hegedűs P, Ruppert M, Brlecic P, Zorn M, Karck M, Szabó G. Mild type 2 diabetes mellitus improves remote endothelial dysfunction after acute myocardial infarction. J Diabetes Complications 2015. [PMID: 26219999 DOI: 10.1016/j.jdiacomp.2015.06.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
AIMS Myocardial infarction (MI) is a common cause of mortality in patients with diabetes mellitus (DM) and vascular dysfunction is a major component of diabetic cardiomyopathy. We investigated the systemic influence of acute MI on the diabetes-induced pathogenic changes in the rat aorta. METHODS Nondiabetic Wistar (W) and type-2 diabetic Goto-Kakizaki (GK) rats underwent 45min of left anterior descending coronary artery occlusion followed by 24h of reperfusion. Isometric force was measured using organ bath. RESULTS Plasma glucose-levels were significantly higher in diabetic rats (GK+sham: 13±2mM; GK+MI: 19±2mM) compared to nondiabetic rats (W+sham: 8±0mM; W+MI: 8±1mM). Acetylcholine-induced relaxation was significantly weaker in rings from W+MI and GK+MI rats compared to corresponding sham-operated animals. Myocardial reperfusion injury was smaller in GK+MI than W+MI rats, and the concentration-response curves to acetylcholine were significantly enhanced in rings from GK+MI than W+MI rats. Nevertheless, the relaxation response to acetylcholine was similar in W+sham and GK+sham. Densitometric analysis of bands for endothelial nitric oxide synthase showed a significant decrease in W+MI rats compared to W+sham and GK+sham animals. Aortas from both GK+sham and GK+MI rats showed impaired contractile responses to phenylephrine in comparison with the nondiabetics. CONCLUSIONS For the first time we showed that short-term and mild type-2 DM improved remote endothelial dysfunction after reperfused acute MI.
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MESH Headings
- Animals
- Aorta
- Blood Glucose/analysis
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/pathology
- Diabetes Mellitus, Type 2/physiopathology
- Diabetic Angiopathies/complications
- Diabetic Angiopathies/physiopathology
- Diabetic Cardiomyopathies/complications
- Diabetic Cardiomyopathies/physiopathology
- Disease Resistance
- Drug Resistance
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/pathology
- Endothelium, Vascular/physiopathology
- Male
- Myocardial Infarction/complications
- Myocardial Infarction/physiopathology
- Myocardial Reperfusion Injury/etiology
- Myocardial Reperfusion Injury/prevention & control
- Nitric Oxide Synthase Type III/metabolism
- Phosphorylation
- Protein Processing, Post-Translational
- Rats
- Rats, Inbred Strains
- Rats, Wistar
- Vasoconstriction/drug effects
- Vasoconstrictor Agents/pharmacology
- Vasodilation/drug effects
- Vasodilator Agents/pharmacology
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Affiliation(s)
- Sevil Korkmaz-Icöz
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany.
| | - Adrian Vater
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany.
| | - Shiliang Li
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany.
| | - Alice Lehner
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany.
| | | | - Péter Hegedűs
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany; Heart Center, Semmelweis University, Budapest, Hungary.
| | - Mihály Ruppert
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany; Heart Center, Semmelweis University, Budapest, Hungary.
| | - Paige Brlecic
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany.
| | - Markus Zorn
- Department of Internal Medicine I, University of Heidelberg, Heidelberg, Germany.
| | - Matthias Karck
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany.
| | - Gábor Szabó
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany.
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Ravingerová T, Ledvényiová-Farkašová V, Ferko M, Barteková M, Bernátová I, Pecháňová O, Adameová A, Kolář F, Lazou A. Pleiotropic preconditioning-like cardioprotective effects of hypolipidemic drugs in acute ischemia–reperfusion in normal and hypertensive rats. Can J Physiol Pharmacol 2015; 93:495-503. [DOI: 10.1139/cjpp-2014-0502] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Although pleiotropy, which is defined as multiple effects derived from a single gene, was recognized many years ago, and considerable progress has since been achieved in this field, it is not very clear how much this feature of a drug is clinically relevant. During the last decade, beneficial pleiotropic effects from hypolipidemic drugs (as in, effects that are different from the primary ones) have been associated with reduction of cardiovascular risk. As with statins, the agonists of peroxisome proliferator-activated receptors (PPARs), niacin and fibrates, have been suggested to exhibit pleiotropic activity that could significantly modify the outcome of a cardiovascular ailment. This review examines findings demonstrating the impacts of treatment with hypolipidemic drugs on cardiac response to ischemia in a setting of acute ischemia–reperfusion, in relation to PPAR activation. Specifically, it addresses the issue of susceptibility to ischemia, with particular regard to the preconditioning-like cardioprotection conferred by hypolipidemic drugs, as well as the potential molecular mechanisms behind this cardioprotection. Finally, the involvement of PPAR activation in the mechanisms of non-metabolic cardioprotective effects from hypolipidemic drugs, and their effects on normal and pathologically altered myocardium (in the hearts of hypertensive rats) is also discussed.
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Affiliation(s)
- Táňa Ravingerová
- Institute for Heart Research, Slovak Academy of Sciences and Centre of Excellence of SAS NOREG, POB 104, Dúbravská cesta 9, 840 05 Bratislava, Slovak Republic
| | - Veronika Ledvényiová-Farkašová
- Institute for Heart Research, Slovak Academy of Sciences and Centre of Excellence of SAS NOREG, POB 104, Dúbravská cesta 9, 840 05 Bratislava, Slovak Republic
| | - Miroslav Ferko
- Institute for Heart Research, Slovak Academy of Sciences and Centre of Excellence of SAS NOREG, POB 104, Dúbravská cesta 9, 840 05 Bratislava, Slovak Republic
| | - Monika Barteková
- Institute for Heart Research, Slovak Academy of Sciences and Centre of Excellence of SAS NOREG, POB 104, Dúbravská cesta 9, 840 05 Bratislava, Slovak Republic
| | - Iveta Bernátová
- Institute of Normal and Pathological Physiology, Slovak Academy of Sciences and Centre of Excellence of SAS NOREG, Bratislava, Slovak Republic
| | - Ol’ga Pecháňová
- Institute of Normal and Pathological Physiology, Slovak Academy of Sciences and Centre of Excellence of SAS NOREG, Bratislava, Slovak Republic
| | - Adriana Adameová
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic
| | - František Kolář
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Antigone Lazou
- School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Pechánová O, Varga ZV, Cebová M, Giricz Z, Pacher P, Ferdinandy P. Cardiac NO signalling in the metabolic syndrome. Br J Pharmacol 2015; 172:1415-33. [PMID: 25297560 PMCID: PMC4369254 DOI: 10.1111/bph.12960] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 09/09/2014] [Accepted: 09/28/2014] [Indexed: 02/06/2023] Open
Abstract
It is well documented that metabolic syndrome (i.e. a group of risk factors, such as abdominal obesity, elevated blood pressure, elevated fasting plasma glucose, high serum triglycerides and low cholesterol level in high-density lipoprotein), which raises the risk for heart disease and diabetes, is associated with increased reactive oxygen and nitrogen species (ROS/RNS) generation. ROS/RNS can modulate cardiac NO signalling and trigger various adaptive changes in NOS and antioxidant enzyme expressions/activities. While initially these changes may represent protective mechanisms in metabolic syndrome, later with more prolonged oxidative, nitrosative and nitrative stress, these are often exhausted, eventually favouring myocardial RNS generation and decreased NO bioavailability. The increased oxidative and nitrative stress also impairs the NO-soluble guanylate cyclase (sGC) signalling pathway, limiting the ability of NO to exert its fundamental signalling roles in the heart. Enhanced ROS/RNS generation in the presence of risk factors also facilitates activation of redox-dependent transcriptional factors such as NF-κB, promoting myocardial expression of various pro-inflammatory mediators, and eventually the development of cardiac dysfunction and remodelling. While the dysregulation of NO signalling may interfere with the therapeutic efficacy of conventional drugs used in the management of metabolic syndrome, the modulation of NO signalling may also be responsible for the therapeutic benefits of already proven or recently developed treatment approaches, such as ACE inhibitors, certain β-blockers, and sGC activators. Better understanding of the above-mentioned pathological processes may ultimately lead to more successful therapeutic approaches to overcome metabolic syndrome and its pathological consequences in cardiac NO signalling.
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Affiliation(s)
- O Pechánová
- Institute of Normal and Pathological Physiology and Centre of Excellence for Regulatory Role of Nitric Oxide in Civilization Diseases, Slovak Academy of SciencesBratislava, Slovak Republic
- Faculty of Natural Sciences, Comenius UniversityBratislava, Slovak Republic
| | - Z V Varga
- Cardiometabolic Research Group, Department of Pharmacology and Pharmacotherapy, Semmelweis UniversityBudapest, Hungary
| | - M Cebová
- Institute of Normal and Pathological Physiology and Centre of Excellence for Regulatory Role of Nitric Oxide in Civilization Diseases, Slovak Academy of SciencesBratislava, Slovak Republic
| | - Z Giricz
- Cardiometabolic Research Group, Department of Pharmacology and Pharmacotherapy, Semmelweis UniversityBudapest, Hungary
| | - P Pacher
- Laboratory of Physiological Studies, National Institutes of Health/NIAAABethesda, MD, USA
| | - P Ferdinandy
- Cardiometabolic Research Group, Department of Pharmacology and Pharmacotherapy, Semmelweis UniversityBudapest, Hungary
- Pharmahungary GroupSzeged, Hungary
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Fenofibrate pre-treatment suppressed inflammation by activating phosphoinositide 3 kinase/protein kinase B (PI3K/Akt) signaling in renal ischemia-reperfusion injury. ACTA ACUST UNITED AC 2015; 35:58-63. [PMID: 25673194 DOI: 10.1007/s11596-015-1389-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 11/05/2014] [Indexed: 12/21/2022]
Abstract
The aim of this study was to investigate the possible beneficial effects of Fenofibrate on renal ischemia-reperfusion injury (IRI) in mice and its potential mechanism. IRI was induced by bilateral renal ischemia for 60 min followed by reperfusion for 24 h. Eighteen male C57BL/6 mice were randomly divided into three groups: sham-operated group (sham), IRI+saline group (IRI group), IRI+Fenofibrate (FEN) group. Normal saline or Fenofibrate (3 mg/kg) was intravenously injected 60 min before renal ischemia in IRI group and FEN group, respectively. Blood samples and renal tissues were collected at the end of reperfusion. The renal function, histopathologic changes, and the expression levels of pro-inflammatory cytokines [interleukin-8 (IL-8), tumor necrosis factor alpha (TNF-α) and IL-6] in serum and renal tissue homogenate were assessed. Moreover, the effects of Fenofibrate on activating phosphoinositide 3 kinase/protein kinase B (PI3K/Akt) signaling and peroxisome proliferator-activated receptor-α (PPAR-α) were also measured in renal IRI. The results showed that plasma levels of blood urea nitrogen and creatinine, histopathologic scores and the expression levels of TNF-α, IL-8 and IL-6 were significantly lower in FEN group than in IRI group. Moreover, Fenofibrate pretreatment could further induce PI3K/Akt signal pathway and PPAR-α activation following renal IRI. These findings indicated PPAR-α activation by Fenofibrate exerts protective effects on renal IRI in mice by suppressing inflammation via PI3K/Akt activation. Thus, Fenofibrate could be a novel therapeutic alternative in renal IRI.
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Barreto-Torres G, Hernandez JS, Jang S, Rodríguez-Muñoz AR, Torres-Ramos CA, Basnakian AG, Javadov S. The beneficial effects of AMP kinase activation against oxidative stress are associated with prevention of PPARα-cyclophilin D interaction in cardiomyocytes. Am J Physiol Heart Circ Physiol 2015; 308:H749-58. [PMID: 25617357 DOI: 10.1152/ajpheart.00414.2014] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 01/16/2015] [Indexed: 12/21/2022]
Abstract
AMP kinase (AMPK) plays an important role in the regulation of energy metabolism in cardiac cells. Furthermore, activation of AMPK protects the heart from myocardial infarction and heart failure. The present study examines whether or not AMPK affects the peroxisome proliferator-activated receptor-α (PPARα)/mitochondria pathway in response to acute oxidative stress in cultured cardiomyocytes. Cultured H9c2 rat embryonic cardioblasts were exposed to H2O2-induced acute oxidative stress in the presence or absence of metformin, compound C (AMPK inhibitor), GW6471 (PPARα inhibitor), or A-769662 (AMPK activator). Results showed that AMPK activation by metformin reverted oxidative stress-induced inactivation of AMPK and prevented oxidative stress-induced cell death. In addition, metformin attenuated reactive oxygen species generation and depolarization of the inner mitochondrial membrane. The antioxidative effects of metformin were associated with the prevention of mitochondrial DNA damage in cardiomyocytes. Coimmunoprecipitation studies revealed that metformin abolished oxidative stress-induced physical interactions between PPARα and cyclophilin D (CypD), and the abolishment of these interactions was associated with inhibition of permeability transition pore formation. The beneficial effects of metformin were not due to acetylation or phosphorylation of PPARα in response to oxidative stress. In conclusion, this study demonstrates that the protective effects of metformin-induced AMPK activation against oxidative stress converge on mitochondria and are mediated, at least in part, through the dissociation of PPARα-CypD interactions, independent of phosphorylation and acetylation of PPARα and CypD.
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Affiliation(s)
- Giselle Barreto-Torres
- Department of Physiology, School of Medicine, University of Puerto Rico, San Juan, Puerto Rico; and
| | - Jessica Soto Hernandez
- Department of Physiology, School of Medicine, University of Puerto Rico, San Juan, Puerto Rico; and
| | - Sehwan Jang
- Department of Physiology, School of Medicine, University of Puerto Rico, San Juan, Puerto Rico; and
| | - Adlín R Rodríguez-Muñoz
- Department of Physiology, School of Medicine, University of Puerto Rico, San Juan, Puerto Rico; and
| | - Carlos A Torres-Ramos
- Department of Physiology, School of Medicine, University of Puerto Rico, San Juan, Puerto Rico; and
| | - Alexei G Basnakian
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Sabzali Javadov
- Department of Physiology, School of Medicine, University of Puerto Rico, San Juan, Puerto Rico; and
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Korkmaz-Icöz S, Lehner A, Li S, Vater A, Radovits T, Hegedűs P, Ruppert M, Brlecic P, Zorn M, Karck M, Szabó G. Mild Type 2 Diabetes Mellitus Reduces the Susceptibility of the Heart to Ischemia/Reperfusion Injury: Identification of Underlying Gene Expression Changes. J Diabetes Res 2015; 2015:396414. [PMID: 26229969 PMCID: PMC4502305 DOI: 10.1155/2015/396414] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 05/18/2015] [Accepted: 05/26/2015] [Indexed: 01/11/2023] Open
Abstract
Despite clinical studies indicating that diabetic hearts are more sensitive to ischemia/reperfusion injury, experimental data is contradictory. Although mild diabetes prior to ischemia/reperfusion may induce a myocardial adaptation, further research is still needed. Nondiabetic Wistar (W) and type 2 diabetic Goto-Kakizaki (GK) rats (16-week-old) underwent 45 min occlusion of the left anterior descending coronary artery and 24 h reperfusion. The plasma glucose level was significantly higher in diabetic rats compared to the nondiabetics. Diabetes mellitus was associated with ventricular hypertrophy and increased interstitial fibrosis. Inducing myocardial infarction increased the glucose levels in diabetic compared to nondiabetic rats. Furthermore, the infarct size was smaller in GK rats than in the control group. Systolic and diastolic functions were impaired in W + MI and did not reach statistical significance in GK + MI animals compared to the corresponding controls. Among the 125 genes surveyed, 35 genes showed a significant change in expression in GK + MI compared to W + MI rats. Short-term diabetes promotes compensatory mechanisms that may provide cardioprotection against ischemia/reperfusion injury, at least in part, by increased antioxidants and the upregulation of the prosurvival PI3K/Akt pathway, by the downregulation of apoptotic genes, proinflammatory cytokine TNF-α, profibrogenic TGF-β, and hypertrophic marker α-actin-1.
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Affiliation(s)
- Sevil Korkmaz-Icöz
- Department of Cardiac Surgery, University of Heidelberg, 69120 Heidelberg, Germany
- *Sevil Korkmaz-Icöz:
| | - Alice Lehner
- Department of Cardiac Surgery, University of Heidelberg, 69120 Heidelberg, Germany
| | - Shiliang Li
- Department of Cardiac Surgery, University of Heidelberg, 69120 Heidelberg, Germany
| | - Adrian Vater
- Department of Cardiac Surgery, University of Heidelberg, 69120 Heidelberg, Germany
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, 1122 Budapest, Hungary
| | - Péter Hegedűs
- Department of Cardiac Surgery, University of Heidelberg, 69120 Heidelberg, Germany
- Heart and Vascular Center, Semmelweis University, 1122 Budapest, Hungary
| | - Mihály Ruppert
- Department of Cardiac Surgery, University of Heidelberg, 69120 Heidelberg, Germany
| | - Paige Brlecic
- Department of Cardiac Surgery, University of Heidelberg, 69120 Heidelberg, Germany
| | - Markus Zorn
- Department of Internal Medicine I, University of Heidelberg, 69120 Heidelberg, Germany
| | - Matthias Karck
- Department of Cardiac Surgery, University of Heidelberg, 69120 Heidelberg, Germany
| | - Gábor Szabó
- Department of Cardiac Surgery, University of Heidelberg, 69120 Heidelberg, Germany
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Gao Y, Hao J, Zhang H, Qian G, Jiang R, Hu J, Wang J, Lei Z, Zhao G. Protective effect of the combinations of glycyrrhizic, ferulic and cinnamic acid pretreatment on myocardial ischemia-reperfusion injury in rats. Exp Ther Med 2014; 9:435-445. [PMID: 25574212 PMCID: PMC4280987 DOI: 10.3892/etm.2014.2134] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 08/01/2014] [Indexed: 12/11/2022] Open
Abstract
The aim of this study was to find an effective drug cocktail pretreatment to protect myocardial tissue of the heart from ischemia-reperfusion (I/R) injury. The mechanisms underlying the effects of the drug cocktail were subsequently explored in order to expand the application of Dang-gui-si-ni-tang (DGSN), a Traditional Chinese Medicine. The active components of DGSN in the serum following oral administration were investigated using high-performance liquid chromatography. The activity of superoxide dismutase (SOD) and malondialdehyde (MDA) levels were then analyzed to show the effect of the active components in the treatment of myocardial I/R injury. An L16 (44) orthogonal experiment was utilized to determine the most effective cocktail mix and the mechanism underlying the effect of this mix on myocardial I/R injury was investigated. It was observed that FCG, a mixture of glycyrrhizic (50 mg/kg), cinnamic (200 mg/kg) and ferulic (300 mg/kg) acid, was the optimal drug cocktail present in DGSN. This was absorbed into the blood following oral administration and was shown to decrease MDA levels and increase the activity of SOD. In conclusion, the findings suggest that FCG, a combination of active ingredients in the DGSN decoction, can be absorbed into the blood and protect the myocardium from I/R injury.
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Affiliation(s)
- Yuqin Gao
- Department of Cardiology, Ninth Affiliated Hospital of the Medical College of Xi'an Jiaotong University and Railway Central Hospital of Xi'an, Xi'an, Shanxi 710054, P.R. China ; College of Medicine, Jinan University, Guangzhou, Guangdong 510632, P.R. China
| | - Jiping Hao
- Department of Cardiology, Ninth Affiliated Hospital of the Medical College of Xi'an Jiaotong University and Railway Central Hospital of Xi'an, Xi'an, Shanxi 710054, P.R. China
| | - Hongkao Zhang
- Department of Nursing Science, Huanghuai University, Zhumadian, Henan 463000, P.R. China
| | - Guoqiang Qian
- College of Pharmacy, Jinan University, Guangzhou, Guangdong 510632, P.R. China
| | - Renwang Jiang
- Department of Cardiology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Jing Hu
- College of Medicine, Jinan University, Guangzhou, Guangdong 510632, P.R. China
| | - Jianing Wang
- Department of Cardiology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Zhang Lei
- Department of Cardiology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Guoping Zhao
- College of Medicine, Jinan University, Guangzhou, Guangdong 510632, P.R. China
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Tanaka S, Sugiyama N, Takahashi Y, Mantoku D, Sawabe Y, Kuwabara H, Nakano T, Shimamoto C, Matsumura H, Marunaka Y, Nakahari T. PPARα autocrine regulation of Ca²⁺-regulated exocytosis in guinea pig antral mucous cells: NO and cGMP accumulation. Am J Physiol Gastrointest Liver Physiol 2014; 307:G1169-79. [PMID: 25342048 DOI: 10.1152/ajpgi.00311.2013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In antral mucous cells, acetylcholine (ACh, 1 μM) activates Ca(2+)-regulated exocytosis, consisting of a peak in exocytotic events that declines rapidly (initial phase) followed by a second slower decline (late phase) lasting during ACh stimulation. GW7647 [a peroxisome proliferation activation receptor α (PPARα) agonist] enhanced the ACh-stimulated initial phase, and GW6471 (a PPARα antagonist) abolished the GW7647-induced enhancement. However, GW6471 produced the delayed, but transient, increase in the ACh-stimulated late phase, and it also decreased the initial phase and produced the delayed increase in the late phase during stimulation with ACh alone. A similar delayed increase in the ACh-stimulated late phase is induced by an inhibitor of the PKG, Rp8BrPETcGMPS, suggesting that GW6471 inhibits cGMP accumulation. An inhibitor of nitric oxide synthase 1 (NOS1), N(5)-[imino(propylamino)methyl]-L-ornithine hydrochloride (N-PLA), also abolished the GW7647-induced-enhancement of ACh-stimulated initial phase but produced the delayed increase in the late phase. However, in the presence of N-PLA, an NO donor or 8BrcGMP enhanced the ACh-stimulated initial phase and abolished the delayed increase in the late phase. Moreover, GW7647 and ACh stimulated NO production and cGMP accumulation in antral mucosae, which was inhibited by GW6471 or N-PLA. Western blotting and immunohistochemistry revealed that NOS1 and PPARα colocalize in antral mucous cells. In conclusion, during ACh stimulation, a PPARα autocrine mechanism, which accumulates NO via NOS1 leading to cGMP accumulation, modulates the Ca(2+)-regulated exocytosis in antral mucous cells.
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Affiliation(s)
- Saori Tanaka
- Nakahari Project of Central Research Laboratory, Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Nanae Sugiyama
- Nakahari Project of Central Research Laboratory, Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Yuko Takahashi
- Nakahari Project of Central Research Laboratory, Mechanobiology Laboratory, Graduate School of Medicine, Nagoya University, Nagoya, Japan, and
| | - Daiki Mantoku
- Nakahari Project of Central Research Laboratory, Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Yukinori Sawabe
- Nakahari Project of Central Research Laboratory, Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroko Kuwabara
- Nakahari Project of Central Research Laboratory, Department of Pathology, and
| | - Takashi Nakano
- Nakahari Project of Central Research Laboratory, Department of Microbiology and Infection Control, Osaka Medical College, Takatsuki, Japan
| | - Chikao Shimamoto
- Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Hitoshi Matsumura
- Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Yoshinori Marunaka
- Nakahari Project of Central Research Laboratory, Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takashi Nakahari
- Nakahari Project of Central Research Laboratory, Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Khalifi S, Rahimipour A, Jeddi S, Ghanbari M, Kazerouni F, Ghasemi A. Dietary nitrate improves glucose tolerance and lipid profile in an animal model of hyperglycemia. Nitric Oxide 2014; 44:24-30. [PMID: 25461274 DOI: 10.1016/j.niox.2014.11.011] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 11/01/2014] [Accepted: 11/14/2014] [Indexed: 01/24/2023]
Abstract
Reduction in nitric oxide (NO) production and bioavailability contribute to the pathogenesis of type 2 diabetes. Administration of nitrate has strong NO-like outcomes in both animals and humans. In this study, we examined the effects of dietary nitrate on glucose tolerance and lipid profile in type 2 diabetic rats. Type 2 diabetes was induced by injection of streptozotocin and nicotinamide. Thirty-two male Wistar rats were divided into 4 groups: controls (C), control+nitrate (CN), diabetes (D), and diabetes+nitrate (DN). For 8 weeks, the CN and DN groups consumed sodium nitrate (100 mg/L in drinking water) while the C and D groups consumed tap water. Serum nitrate+nitrite (NOx), glucose, lipid profile, total antioxidant capacity (TAC), and catalase (CAT) activity were measured before and at the end of the study. Systolic blood pressure (SBP) was measured every 10 days. Intravenous glucose tolerance test (IVGTT) was performed at the end of the study. Serum NOx decreased in diabetic rats and dietary nitrate restored it to normal values. Increases in serum glucose levels was significantly lower in the DN group compared to the D group (24.1% vs. 90.2%; p < 0.05). Nitrate therapy in diabetic rats significantly improved lipid profile, glucose tolerance (AUC: 20264 ± 659 vs. 17923 ± 523; p < 0.05 for D and DN groups respectively) and restored elevated SBP to normal values. Diabetic rats had lower TAC and CAT activity and dietary nitrate restored these to normal status. In conclusion, dietary nitrate prevented increase in SBP and serum glucose, improved glucose tolerance and restored dyslipidemia in an animal model of hyperglycemia.
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Affiliation(s)
- Saeedeh Khalifi
- Department of Medical Laboratory Sciences, Faculty of Paramedical Sciences, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Ali Rahimipour
- Department of Medical Laboratory Sciences, Faculty of Paramedical Sciences, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Sajad Jeddi
- Endocrine Physiology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahboubeh Ghanbari
- Endocrine Physiology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Faranak Kazerouni
- Department of Medical Laboratory Sciences, Faculty of Paramedical Sciences, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Asghar Ghasemi
- Endocrine Physiology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Ravingerová T, Carnická S, Ledvényiová V, Barlaka E, Galatou E, Chytilová A, Mandíková P, Nemčeková M, Adameová A, Kolář F, Lazou A. Upregulation of genes involved in cardiac metabolism enhances myocardial resistance to ischemia/reperfusion in the rat heart. Physiol Res 2014; 62:S151-63. [PMID: 24329695 DOI: 10.33549/physiolres.932597] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
UNLABELLED Genes encoding enzymes involved in fatty acids (FA) and glucose oxidation are transcriptionally regulated by peroxisome proliferator-activated receptors (PPAR), members of the nuclear receptor superfamily. Under conditions associated with O(2) deficiency, PPAR-alpha modulates substrate switch (between FA and glucose) aimed at the adequate energy production to maintain basic cardiac function. Both, positive and negative effects of PPAR-alpha activation on myocardial ischemia/reperfusion (I/R) injury have been reported. Moreover, the role of PPAR-mediated metabolic shifts in cardioprotective mechanisms of preconditioning (PC) is relatively less investigated. We explored the effects of PPAR-alpha upregulation mimicking a delayed "second window" of PC on I/R injury in the rat heart and potential downstream mechanisms involved. Pretreatment of rats with PPAR-alpha agonist WY-14643 (WY, 1 mg/kg, i.p.) 24 h prior to I/R reduced post-ischemic stunning, arrhythmias and the extent of lethal injury (infarct size) and apoptosis (caspase-3 expression) in isolated hearts exposed to 30-min global ischemia and 2-h reperfusion. Protection was associated with remarkably increased expression of PPAR-alpha target genes promoting FA utilization (medium-chain acyl-CoA dehydrogenase, pyruvate dehydrogenase kinase-4 and carnitine palmitoyltransferase I) and reduced expression of glucose transporter GLUT-4 responsible for glucose transport and metabolism. In addition, enhanced Akt phosphorylation and protein levels of eNOS, in conjunction with blunting of cardioprotection by NOS inhibitor L-NAME, were observed in the WY-treated hearts. CONCLUSIONS upregulation of PPAR-alpha target metabolic genes involved in FA oxidation may underlie a delayed phase PC-like protection in the rat heart. Potential non-genomic effects of PPAR-alpha-mediated cardioprotection may involve activation of prosurvival PI3K/Akt pathway and its downstream targets such as eNOS and subsequently reduced apoptosis.
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Affiliation(s)
- T Ravingerová
- Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovak Republic.
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Kiss A, Tratsiakovich Y, Gonon AT, Fedotovskaya O, Lanner JT, Andersson DC, Yang J, Pernow J. The role of arginase and rho kinase in cardioprotection from remote ischemic perconditioning in non-diabetic and diabetic rat in vivo. PLoS One 2014; 9:e104731. [PMID: 25140754 PMCID: PMC4139318 DOI: 10.1371/journal.pone.0104731] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 07/11/2014] [Indexed: 11/19/2022] Open
Abstract
Background Pharmacological inhibition of arginase and remote ischemic perconditioning (RIPerc) are known to protect the heart against ischemia/reperfusion (IR) injury. Purpose The objective of this study was to investigate whether (1) peroxynitrite-mediated RhoA/Rho associated kinase (ROCK) signaling pathway contributes to arginase upregulation following myocardial IR; (2) the inhibition of this pathway is involved as a cardioprotective mechanism of remote ischemic perconditioning and (3) the influence of diabetes on these mechanisms. Methods Anesthetized rats were subjected to 30 min left coronary artery ligation followed by 2 h reperfusion and included in two protocols. In protocol 1 rats were randomized to 1) control IR, 2) RIPerc induced by bilateral femoral artery occlusion for 15 min during myocardial ischemia, 3) RIPerc and administration of the nitric oxide synthase inhibitor NG-monomethyl-L-arginine (L-NMMA), 4) administration of the ROCK inhibitor hydroxyfasudil or 5) the peroxynitrite decomposition catalyst FeTPPS. In protocol 2 non-diabetic and type 1 diabetic rats were randomosed to IR or RIPerc as described above. Results Infarct size was significantly reduced in rats treated with FeTPPS, hydroxyfasudil and RIPerc compared to controls (P<0.001). FeTPPS attenuated both ROCK and arginase activity (P<0.001 vs. control). Similarly, RIPerc reduced arginase and ROCK activity, peroxynitrite formation and enhanced phospho-eNOS expression (P<0.05 vs. control). The cardioprotective effect of RIPerc was abolished by L-NMMA. The protective effect of RIPerc and its associated changes in arginase and ROCK activity were abolished in diabetes. Conclusion Arginase is activated by peroxynitrite/ROCK signaling cascade in myocardial IR. RIPerc protects against IR injury via a mechanism involving inhibition of this pathway and enhanced eNOS activation. The beneficial effect and associated molecular changes of RIPerc is abolished in type 1 diabetes.
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Affiliation(s)
- Attila Kiss
- Division of Cardiology, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
- * E-mail:
| | - Yahor Tratsiakovich
- Division of Cardiology, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Adrian T. Gonon
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge, Sweden
| | - Olga Fedotovskaya
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Johanna T. Lanner
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Daniel C. Andersson
- Division of Cardiology, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Jiangning Yang
- Division of Cardiology, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - John Pernow
- Division of Cardiology, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
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Guo CY, Ma XJ, Wang JS, Shi Y, Liu X, Yin HJ, Chen KJ. Effects of Panax Quinquefolium Saponin on phosphatidylinositol 3-kinase/serine threonine kinase pathway of neonatal rat myocardial cells subjected to hypoxia. Chin J Integr Med 2014; 21:384-8. [DOI: 10.1007/s11655-014-1881-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Indexed: 11/24/2022]
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50
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Overexpression of the muscle-specific protein, melusin, protects from cardiac ischemia/reperfusion injury. Basic Res Cardiol 2014; 109:418. [PMID: 24859929 DOI: 10.1007/s00395-014-0418-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Revised: 05/13/2014] [Accepted: 05/16/2014] [Indexed: 02/02/2023]
Abstract
Melusin is a muscle-specific protein which interacts with β1 integrin cytoplasmic domain and acts as chaperone protein. Its overexpression induces improved resistance to cardiac overload delaying left ventricle dilation and reducing the occurrence of heart failure. Here, we investigated possible protective effect of melusin overexpression against acute ischemia/reperfusion (I/R) injury with or without Postconditioning cardioprotective maneuvers. Melusin transgenic (Mel-TG) mice hearts were subjected to 30-min global ischemia followed by 60-min reperfusion. Interestingly, infarct size was reduced in Mel-TG mice hearts compared to wild-type (WT) hearts (40.3 ± 3.5 % Mel-TG vs. 59.5 ± 3.8 % WT hearts; n = 11 animals/group; P < 0.05). The melusin protective effect was also demonstrated by measuring LDH release, which was 50 % lower in Mel-TG compared to WT. Mel-TG hearts had a higher baseline level of AKT, ERK1/2 and GSK3β phosphorylation, and displayed increased phospho-kinases level after I/R compared to WT mice. Post-ischemic Mel-TG hearts displayed also increased levels of the anti-apoptotic factor phospho-BAD. Importantly, pharmacological inhibition of PI3K/AKT (Wortmannin) and ERK1/2 (U0126) pathways abrogated the melusin protective effect. Notably, HSP90, a chaperone known to protect heart from I/R injury, showed high levels of expression in the heart of Mel-TG mice suggesting a possible collaboration of this molecule with AKT/ERK/GSK3β pathways in the melusin-induced protection. Postconditioning, known to activate AKT/ERK/GSK3β pathways, significantly reduced IS and LDH release in WT hearts, but had no additive protective effects in Mel-TG hearts. These findings implicate melusin as an enhancer of AKT and ERK pathways and as a novel player in cardioprotection from I/R injury.
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