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Ojo OA, Ogunlakin AD, Akintayo CO, Olukiran OS, Adetunji JB, Ajayi-Odoko OA, Ogwa TO, Molehin OR, Ojo OO, Mothana RA, Alanzi AR. Spilanthes filicaulis (Schumach. & Thonn.) C.D. Adams leaves protects against streptozotocin-induced diabetic nephropathy. PLoS One 2024; 19:e0301992. [PMID: 38640098 PMCID: PMC11029641 DOI: 10.1371/journal.pone.0301992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 03/22/2024] [Indexed: 04/21/2024] Open
Abstract
BACKGROUND AND OBJECTIVE Diabetic neuropathy (DN) is a complex type of diabetes. The underlying cause of diabetic nephropathy remains unclear and may be due to a variety of pathological conditions resulting in kidney failure. This study examines the protective effect of the methanolic extract of Spilanthes filicaulis leaves (MESFL) in fructose-fed streptozotocin (STZ)-induced diabetic nephropathy and the associated pathway. METHODS Twenty-five rats were equally divided randomly into five categories: Control (C), diabetic control, diabetic + metformin (100 mg/kg), diabetic + MESFL 150 mg/kg bw, and diabetic + MESFL 300 mg/kg bw. After 15 days, the rats were evaluated for fasting blood glucose (FBG), alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), urea, uric acid, serum creatinine, reduced glutathione (GSH), superoxide dismutase (SOD), catalase (CAT), and lipid peroxidation (MDA). Gene expression levels of cyclic adenosine monophosphate (cAMP), protein kinase A (PKA), cAMP response element-binding (CREB), cFOS and the antiapoptotic protein Bcl-2 were examined. RESULTS We observed that MESFL at 150 and 300 mg/kg bw significantly downregulated the protein expression of cAMP, PKA, CREB, and cFOS and upregulated the Bcl-2 gene, suggesting that the nephroprotective action of MESFL is due to the suppression of the cAMP/PKA/CREB/cFOS signaling pathway. In addition, MESFL increases SOD and CAT activities and GSH levels, reduces MDA levels, and reduces renal functional indices (ALP, urea, uric acid, and creatinine). CONCLUSION Therefore, our results indicate that MESFL alleviates the development of diabetic nephropathy via suppression of the cAMP/PKA/CREB/cFOS pathways.
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Affiliation(s)
- Oluwafemi Adeleke Ojo
- Phytomedicine, Molecular Toxicology, and Computational Biochemistry Research Laboratory (PMTCB-RL), Department of Biochemistry, Bowen University, Iwo, Nigeria
| | - Akingbolabo Daniel Ogunlakin
- Phytomedicine, Molecular Toxicology, and Computational Biochemistry Research Laboratory (PMTCB-RL), Department of Biochemistry, Bowen University, Iwo, Nigeria
| | | | | | | | | | - Theophilus Oghenenyoreme Ogwa
- Phytomedicine, Molecular Toxicology, and Computational Biochemistry Research Laboratory (PMTCB-RL), Department of Biochemistry, Bowen University, Iwo, Nigeria
| | | | | | - Ramzi A. Mothana
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi, Arabia
| | - Abdullah R. Alanzi
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi, Arabia
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Yang J, Hao J, Lin Y, Guo Y, Liao K, Yang M, Cheng H, Yang M, Chen K. Profile and Functional Prediction of Plasma Exosome-Derived CircRNAs From Acute Ischemic Stroke Patients. Front Genet 2022; 13:810974. [PMID: 35360855 PMCID: PMC8963851 DOI: 10.3389/fgene.2022.810974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 01/31/2022] [Indexed: 12/23/2022] Open
Abstract
Stroke is one of the major causes of death and long-term disability, of which acute ischemic stroke (AIS) is the most common type. Although circular RNA (circRNA) expression profiles of AIS patients have been reported to be significantly altered in blood and peripheral blood mononuclear cells, the role of exosome-containing circRNAs after AIS is still unknown. Plasma exosomes from 10 AIS patients and 10 controls were isolated, and through microarray and bioinformatics analysis, the profile and putative function of circRNAs in the plasma exosomes were studied. A total of 198 circRNAs were differentially quantified (|log2 fold change| ≥ 1.00, p < 0.05) between AIS patients and controls. The levels of 12 candidate circRNAs were verified by qRT-PCR, and the quantities of 10 of these circRNAs were consistent with the data of microarray. The functions of host genes of differentially quantified circRNAs, including RNA and protein process, focal adhesion, and leukocyte transendothelial migration, were associated with the development of AIS. As a miRNA sponge, differentially quantified circRNAs had the potential to regulate pathways related to AIS, like PI3K-Akt, AMPK, and chemokine pathways. Of 198 differentially quantified circRNAs, 96 circRNAs possessing a strong translational ability could affect cellular structure and activity, like focal adhesion, tight junction, and endocytosis. Most differentially quantified circRNAs were predicted to bind to EIF4A3 and AGO2—two RNA-binding proteins (RBPs)—and to play a role in AIS. Moreover, four of ten circRNAs with verified levels by qRT-PCR (hsa_circ_0112036, hsa_circ_0066867, hsa_circ_0093708, and hsa_circ_0041685) were predicted to participate in processes of AIS, including PI3K-Akt, AMPK, and chemokine pathways as well as endocytosis, and to be potentially useful as diagnostic biomarkers for AIS. In conclusion, plasma exosome-derived circRNAs were significantly differentially quantified between AIS patients and controls and participated in the occurrence and progression of AIS by sponging miRNA/RBPs or translating into proteins, indicating that circRNAs from plasma exosomes could be crucial molecules in the pathogenesis of AIS and promising candidates as diagnostic biomarkers and therapeutic targets for the condition.
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Affiliation(s)
- Jie Yang
- Department of Neurology, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, China
- Department of Neurology, Clinical Medical College, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Junli Hao
- School of Bioscience and Technology, Chengdu Medical College, Chengdu, China
| | - Yapeng Lin
- Department of Neurology, Clinical Medical College, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Yijia Guo
- International Clinical Research Center, Chengdu Medical College, Chengdu, China
| | - Ke Liao
- International Clinical Research Center, Chengdu Medical College, Chengdu, China
| | - Min Yang
- Department of Neurology, Clinical Medical College, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Hang Cheng
- Department of Neurology, Clinical Medical College, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Ming Yang
- Department of Neurology, Clinical Medical College, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Kejie Chen
- School of Public Health, Chengdu Medical College, Chengdu, China
- *Correspondence: Kejie Chen,
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Bruic M, Grujic-Milanovic J, Miloradovic Z, Jovovic D, Zivkovic L, Mihailovic-Stanojevic N, Karanovic D, Spremo-Potparevic B. DNA, protein and lipid oxidative damage in tissues of spontaneously hypertensive versus normotensive rats. Int J Biochem Cell Biol 2021; 141:106088. [PMID: 34601089 DOI: 10.1016/j.biocel.2021.106088] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 09/06/2021] [Accepted: 09/25/2021] [Indexed: 10/20/2022]
Abstract
Oxidative damage to protein and lipid macromolecules in target organs in hypertension has been recognized as a major factor contributing to cardiovascular, cerebrovascular, and renal diseases. Data on protein and lipid oxidative damage in spontaneously hypertensive rats are numerous, but there is no information on DNA damage in tissues measured by comet assay. The aim of this study was to determine the baseline damage to DNA, protein, and lipid macromolecules in different organs of spontaneously hypertensive rats. Markers of lipid peroxidation, protein oxidation, and DNA damage were measured in blood, heart, kidney, and liver of 24-week-old spontaneously hypertensive rats. Plasma prooxidant and antioxidant status were determined as well. Age-matched normotensive Wistar rats were used as control. A rise in markers of lipid peroxidation and protein oxidation, malondialdehyde, and advanced oxidation protein products, was detected in all tissues of spontaneously hypertensive rats, with particularly high values in the liver. DNA damage, measured by the comet assay, was significantly higher in all the studied tissues of spontaneously hypertensive rats compared to normotensive control, with more severe damage in the cardiac and renal cells. Significant depletion of the plasma antioxidant barrier in spontaneously hypertensive rats was also observed. This study showed increased damage to all macromolecules in all studied samples of spontaneously hypertensive rats in comparison with control Wistar rats.
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Affiliation(s)
- Marija Bruic
- Department of Pathobiology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia.
| | - Jelica Grujic-Milanovic
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Belgrade, Serbia
| | - Zoran Miloradovic
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Belgrade, Serbia
| | - Djurdjica Jovovic
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Belgrade, Serbia
| | - Lada Zivkovic
- Department of Pathobiology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Nevena Mihailovic-Stanojevic
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Belgrade, Serbia
| | - Danijela Karanovic
- Department of Cardiovascular Physiology, Institute for Medical Research, University of Belgrade, Belgrade, Serbia
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Qian Z, Zhu L, Li Y, Li Y, Wu Y, Fu S, Yang D. Icarrin prevents cardiomyocyte apoptosis in spontaneously hypertensive rats by inhibiting endoplasmic reticulum stress pathways. J Pharm Pharmacol 2021; 73:1023-1032. [PMID: 34018553 DOI: 10.1093/jpp/rgaa016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 10/05/2020] [Indexed: 01/10/2023]
Abstract
OBJECTIVES This study aimed to explore whether icarrin (ICA) can protect cardiomyocytes from hypertension-induced damage by inhibiting endoplasmic reticulum stress (ERS). METHODS Spontaneously hypertensive rats (SHRs) were orally administered water or ICA at 10, 20 and 40 mg/kg once daily for 12 weeks, and Wistar-Kyoto (WKY) rats were used as control. Changes in the growth and blood pressure of rats were assessed. Cardiac function was determined by ultrasound and the left ventricle mass was calculated. Myocardial tissue structure was assessed by haematoxylin and eosin staining, cardiomyocyte apoptosis was observed by TUNEL staining and the expression of ERS-related proteins was determined by western blotting. RESULTS In the SHR group, blood pressure was significantly high, left ventricular function decreased and left ventricular mass index increased. Additionally, left ventricular cardiomyocyte hypertrophy, disordered myofilament arrangement and increased cardiomyocyte apoptosis were observed by histological staining. ERS-induced proteins associated with apoptosis, including GRP78, PERK, ATF-6, ATF-4, CHOP, DR5, Caspase 12, c-JUN and ASK-1 were found to be highly expressed. ICA treatment reduced blood pressure and regulated the expression of proteins induced by ERS. Cardiomyocyte apoptosis decreased and left ventricular function improved. CONCLUSIONS ICA can inhibit ERS-induced apoptosis of cardiomyocytes and protect ventricular function in SHR.
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Affiliation(s)
- Zhiqiang Qian
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China.,Taizhou Jiangyan Hospital of TCM, Jiangyan Affiliated Hospital of Nanjing University of traditional Chinese Medicine, Taizhou, Jiangsu, China
| | - Ling Zhu
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Yeli Li
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Yiqi Li
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Yuting Wu
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Shu Fu
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Danli Yang
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
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Sun C, Li X, Wang D, Wang L. Therapeutic and Diagnostic Value of Caspase-12 and Study of Growth Differentiation Factor-15 in Patients with Acute Myocar-dial Infarction. IRANIAN JOURNAL OF PUBLIC HEALTH 2020; 49:2339-2347. [PMID: 34178740 PMCID: PMC8215053 DOI: 10.18502/ijph.v49i12.4817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Background: To investigate the therapeutic and diagnostic value of caspase-12 and study of growth differentiation factor-15 (GDF-15) in patients with acute myocardial infarction (AMI). Methods: Overall, 78 patients with AMI admitted to Weifang People's Hospital Brain Hospital, Weifang, China from Apr 2016 to Apr 2019 were enrolled as AMI group. Seventy-five non-AMI people undergoing physical examination during the same period were enrolled as non-AMI group. The expression levels of caspase-12 and GDF-15 were detected and compared. The correlation between the expressions of GDF-15, caspase-12 and clinical characteristics and efficacy was detected. Single and combined detection of GDF-15 and caspase-12 were performed analyze their role in the early diagnosis, the prediction of efficacy, and the guidance of clinical therapy. Results: After treatment, the levels of GDF-15 and caspase-12 in AMI group were significantly lower than those before treatment (P<0.001). The expression levels of GDF-15 and caspase-12 were significantly correlated with blood pressure (P<0.05). The expression levels of GDF-15 and caspase-12 were significantly negatively correlated with clinical efficacy in AMI group. The diagnostic value of combined detection of GDF-15 and caspase-12 was higher than that of single diagnosis. The levels of serum caspase-12 and GDF-15 proteins were significantly up regulated in AMI patients. With the better therapeutic effect, the levels of serum caspase-12 and GDF-15 proteins decreased significantly. Conclusion: The levels of serum caspase-12 and GDF-15 proteins may be a key indicator in the clinical diagnosis of acute myocardial infarction and may be used to guide the treatment of AMI patients and predict the therapeutic efficacy.
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Affiliation(s)
- Changqing Sun
- Department of Internal Medicine, Weifang People's Hospital Brain Hospital, Weifang 261021, P.R. China
| | - Xiulin Li
- Electrocardiographic Room, Weifang People's Hospital Brain Hospital, Weifang 261021, P.R. China
| | - Daoqing Wang
- Department of Internal Medicine, Weifang Weicheng People's Hospital, Weifang 261041, P.R. China
| | - Liming Wang
- Department of Intensive Care Unit, Weifang People's Hospital, Weifang 261000, P.R. China
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Alaofi AL. Sinapic Acid Ameliorates the Progression of Streptozotocin (STZ)-Induced Diabetic Nephropathy in Rats via NRF2/HO-1 Mediated Pathways. Front Pharmacol 2020; 11:1119. [PMID: 32792955 PMCID: PMC7390867 DOI: 10.3389/fphar.2020.01119] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 07/09/2020] [Indexed: 12/13/2022] Open
Abstract
Diabetic neuropathy (DN) is a complicated inauspicious outcome of diabetes, like other abnormalities of diabetes the cause of DN is still vague and it may be the result of various pathological conditions leading up to end-stage renal failure. The present study examines the efficacy of sinapic acid (SA) in streptozotocin (STZ)-induced DN nephropathy and the linked pathway. Twenty-four rats were equally divided randomly into four categories: Normal control (NC), STZ, STZ + SA 20 mg/kg bw, and STZ + SA 40 mg/kg bw. After 8 weeks they were evaluated for ratio of renal index, the fasting blood glucose (FBG), blood urea nitrogen (BUN), 24 h urea protein, serum creatinine (SCr), reduced glutathione peroxidase (GPx), superoxide dismutase (SOD), lipid peroxidation (MDA), tumor necrosis factor α (TNFα), interleukin (IL)-6, as well as lipid profile total cholesterol (TC), total triglycerides (TG), very low density lipoprotein (VLDL), low density lipoprotein (LDL), and high density lipoprotein (HDL) levels. Additionally, histomorphology and ultrastructure of the kidneys were also assessed. Protein expression levels of transforming growth factor-β1 (TGF-β1), nuclear factor erythroid 2-related factor 2 (Nrf2), heme oxygenase-1 (HO-1), IκBα protein (IkBα), anti-apoptotic protein BCl2, nuclear factor kappa B (NF-kB), and Bax were examined. We observed that SA 20 mg/kg bw and 40 mg/kg bw pretreatment significantly and dose-dependently upregulated the protein expression of HO-1, Nrf2, IKBα, and Bcl-2 but downregulated the protein expression of NF-κB, proposing that the nephroprotective mechanism of SA is due to its antioxidant and anti-inflammatory activity; SA prevents the release of cytokines and inflammatory markers (TNFα and IL-6), upregulates antioxidant defense enzymes, and reduces lipid peroxidation, as well as nitric oxide, and anti-apoptotic activity, which may be influenced by the regulation of TNF-α, IL-6, Bcl-2, NF-kB, and BaX via the Nrf2/HO-1 pathway in STZ induced DN. Thus, our results suggest that SA ameliorates the development of STZ-induced DN in rats via NRF2/HO-1 mediated pathways. Further comprehensive studies are required for complete elucidation of the fundamental mechanisms.
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Affiliation(s)
- Ahmed L. Alaofi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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da Costa GF, Ognibene DT, da Costa CA, Teixeira MT, Cordeiro VDSC, de Bem GF, Moura AS, Resende ADC, de Moura RS. Vitis vinifera L. Grape Skin Extract Prevents Development of Hypertension and Altered Lipid Profile in Spontaneously Hypertensive Rats: Role of Oxidative Stress. Prev Nutr Food Sci 2020; 25:25-31. [PMID: 32292752 PMCID: PMC7143014 DOI: 10.3746/pnf.2020.25.1.25] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 01/31/2020] [Indexed: 12/12/2022] Open
Abstract
This study investigated the protective effect of a Vitis vinifera L. grape skin extract (ACH09) on blood pressure, lipid profile, and oxidative status in spontaneously hypertensive rats (SHR). Systolic blood pressure (SBP), total cholesterol, triglyceride, and glucose levels, as well as oxidative damage and antioxidant activity in the plasma and kidney, were evaluated in four experimental groups: control Wistar rats (W-C) and SHR-C that received water, and Wistar rats and SHR treated with ACH09 (200 mg/kg/d) in drinking water for 12 weeks (W-ACH09 and SHR-ACH09, respectively). SBP increased in the SHR group compared with the W groups and the treatment with ACH09 prevented the development of hypertension. Plasma triglyceride and total cholesterol levels increased in SHR compared with W-C rats; these changes prevented by treatment with ACH09. Glucose levels did not differ between the groups. The SHR group had increased oxidative damage in plasma, as expressed by 2-thiobarbituric acid reactive substances (TBARS) levels, and this prevented by ACH09. Levels of TBARS in the kidneys were lower in the SHR-ACH09 group than in the SHR-C group. Further, ACH09 increased the superoxide dismutase activity in both the plasma and kidneys of both SHR and Wistar rats. These results suggest that ACH09 is protective against disruption of blood pressures, oxidant status, and lipid profile in SHR, and provide important evidence on the benefits of ACH09 on hypertension and associated cardiovascular complications.
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Affiliation(s)
| | | | | | - Michelle Teixeira Teixeira
- Department of Nutrition and Public Health, Federal University of the State of Rio de Janeiro, RJ 22290-240, Brazil
| | | | | | - Aníbal Sanchez Moura
- Department of Physiological Sciences, Rio de Janeiro State University, RJ 20551-030, Brazil
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Bal NB, Han S, Kiremitci S, Sadi G, Uludag O, Demirel-Yilmaz E. Hypertension-induced cardiac impairment is reversed by the inhibition of endoplasmic reticulum stress. ACTA ACUST UNITED AC 2019; 71:1809-1821. [PMID: 31579948 DOI: 10.1111/jphp.13169] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 08/09/2019] [Accepted: 09/01/2019] [Indexed: 12/17/2022]
Abstract
OBJECTIVES Endoplasmic reticulum stress (ERS) has been shown to play a crucial role in the pathogenesis of hypertension. However, the role and mechanisms of ERS on hypertension-induced cardiac functional and morphological changes remain unclear. In this study, the effect of ERS inhibition with tauroursodeoxycholic acid (TUDCA) on hypertension-induced cardiac remodelling was examined. METHODS Hypertension was induced by deoxycorticosterone-acetate (DOCA) and salt administration in uni-nephrectomized rats for 12 weeks. TUDCA was administered for the last four weeks. Rhythmic activity and contractions of the right atrium and left papillary muscle (LPM) were recorded. In the left ventricle, the expression of various proteins was examined and histopathological evaluation was performed. KEY FINDINGS Hypertension-induced increments in systolic blood pressure and ventricular contractions were reversed by TUDCA. In the hypertensive heart, while expressions of glucose-regulated protein-78 (GRP78), phospho-dsRNA-activated protein kinase-like ER kinase (p-PERK), sarcoplasmic reticulum Ca-ATPase-2 (SERCA2), matrix metalloproteinase-2 (MMP-2) and nuclear NF-κB p65 increased; Bcl-2 (B-cell lymphoma-2) expression decreased and the altered levels of all these markers were restored by TUDCA. In the microscopic examination, TUDCA treatment attenuated hypertension-stimulated cardiac inflammation and fibrosis. CONCLUSIONS These results suggest that ERS inhibition may ameliorate cardiac contractility through improving ERS-associated calcium mishandling, apoptosis, inflammation and fibrosis, thereby offering therapeutic potential in hypertension-induced cardiac dysfunction.
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Affiliation(s)
- Nur Banu Bal
- Department of Pharmacology, Faculty of Pharmacy, Gazi University, Ankara, Turkey
| | - Sevtap Han
- Department of Pharmacology, Faculty of Pharmacy, Gazi University, Ankara, Turkey
| | - Saba Kiremitci
- Department of Pathology, Faculty of Medicine, Ankara University, Ankara, Turkey
| | - Gökhan Sadi
- Department of Biology, K.Ö. Faculty of Science, Karamanoglu Mehmetbey University, Karaman, Turkey
| | - Orhan Uludag
- Department of Pharmacology, Faculty of Pharmacy, Gazi University, Ankara, Turkey
| | - Emine Demirel-Yilmaz
- Department of Medical Pharmacology, Faculty of Medicine, Ankara University, Ankara, Turkey
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Tumanovska LV, Swanson RJ, Serebrovska ZO, Portnichenko GV, Goncharov SV, Kysilov BA, Moibenko OO, Dosenko VE. Cholesterol enriched diet suppresses ATF6 and PERK and upregulates the IRE1 pathways of the unfolded protein response in spontaneously hypertensive rats: Relevance to pathophysiology of atherosclerosis in the setting of hypertension. ACTA ACUST UNITED AC 2019; 26:219-226. [PMID: 31202527 DOI: 10.1016/j.pathophys.2019.05.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 05/24/2019] [Accepted: 05/26/2019] [Indexed: 12/13/2022]
Abstract
Many studies have been dedicated to hypertension and hypercholesterolemia, as they are the primary conditions that influence the unfolded protein response (UPR). However, the concurrent effects of these two factors are unknown. Our research used spontaneously hypertensive rats (SHR) fed a cholesterol enriched diet (CED) as model of atherosclerosis formation to discover what effect the simultaneous actions of hypertension and hypercholesterolemia have on the UPR. The combination of hypertension and consumption of a CED (not the CED alone) caused the formation of early atherosclerotic features. Both increased expression of the CCAAT-enhancer-binding protein (CHOP) and the insulin induced gene 1 (INSIG1), which is the target gene of the sterol regulatory element-binding protein 1-c (SREBP1-c), and decreased expression of the spliced x-box binding protein1 (sXBP1) mRNA were observed in the SHR fed a CED. Cholesterol overload strongly suppressed glucose regulated protein 78 (GRP78), glucose regulated protein 94 (GRP 94), and the expression of CHOP and INSIG1 mRNA in both normotensive and hypertensive rats. Unlike other UPR factors, the sXBP1 mRNA expression was strongly downregulated in SHR fed a normal diet but upregulated in those fed a CED. The changes to UPR in the SHR fed a CED were associated with improvement of the initially impaired heart function of the rats.
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Affiliation(s)
- Lesya V Tumanovska
- Department of General and Molecular Pathophysiology, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | - R James Swanson
- Liberty University College of Osteopathic Medicine, 306 Liberty View Lane, Lynchburg, VA 24502, USA
| | - Zoya O Serebrovska
- Department of General and Molecular Pathophysiology, Bogomoletz Institute of Physiology, Kyiv, Ukraine.
| | - Georgii V Portnichenko
- Department of General and Molecular Pathophysiology, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | - Sergii V Goncharov
- Department of General and Molecular Pathophysiology, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | - Bohdan A Kysilov
- Department of General and Molecular Pathophysiology, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | - Olexandr O Moibenko
- Department of General and Molecular Pathophysiology, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | - Victor E Dosenko
- Department of General and Molecular Pathophysiology, Bogomoletz Institute of Physiology, Kyiv, Ukraine
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Naiel S, Carlisle RE, Lu C, Tat V, Dickhout JG. Endoplasmic reticulum stress inhibition blunts the development of essential hypertension in the spontaneously hypertensive rat. Am J Physiol Heart Circ Physiol 2019; 316:H1214-H1223. [DOI: 10.1152/ajpheart.00523.2018] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Essential hypertension is the leading cause of premature death worldwide. However, hypertension’s cause remains uncertain. endoplasmic reticulum (ER) stress has recently been associated with hypertension, but it is unclear whether ER stress causes hypertension. To clarify this question, we examined if ER stress occurs in blood vessels before the development of hypertension and if ER stress inhibition would prevent hypertension development. We used the spontaneously hypertensive rat (SHR) as a model of human essential hypertension and the Wistar-Kyoto (WKY) rat as its normotensive control. Resistance arteries collected from young rats determined that ER stress was present in SHR vessels before the onset of hypertension. To assess the effect of ER stress inhibition on hypertension development, another subset of rats were treated with 4-phenylbutyric acid (4-PBA; 1 g·kg−1·day−1) for 8 wk from 5 wk of age. Blood pressure was measured via radiotelemetry and compared with untreated SHR and WKY rats. Mesenteric resistance arteries were collected and assessed for structural and functional changes associated with hypertension. Systolic and diastolic blood pressures were significantly lower in the 4-PBA-treated SHR groups than in untreated SHRs. Additionally, 4-PBA significantly decreased the media-to-lumen ratio and ER stress marker expression, improved vasodilatory response, and reduced contractile responses in resistance arteries from SHRs. Overall, ER stress inhibition blunted the development of hypertension in the SHR. These data add evidence to the hypothesis that a component of hypertension in the SHR is caused by ER stress. NEW & NOTEWORTHY In this study, 4-phenylbutyric acid’s (4-PBA’s) molecular chaperone capability was used to inhibit endoplasmic reticulum (ER) stress in the small arteries of young spontaneously hypertensive rats (SHRs) and reduce their hypertension. These effects are likely mediated through 4-PBA's effects to reduce resistant artery contractility and increase nitric oxide-mediated endothelial vasodilation through a process preventing endothelial dysfunction. Overall, ER stress inhibition blunted the development of hypertension in this young SHR model. This suggests that a component of the increase in blood pressure found in SHRs is due to ER stress. However, it is important to note that inhibition of ER stress was not able to fully restore the blood pressure to normal, suggesting that a component of hypertension may not be due to ER stress. This study points to the inhibition of ER stress as an important new physiological pathway to lower blood pressure, where other known approaches may not achieve blood pressure-lowering targets.
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Affiliation(s)
- Safaa Naiel
- Department of Medicine, Hamilton Centre for Kidney Research, McMaster University and St. Joseph’s Healthcare Hamilton, Hamilton, Ontario, Canada
| | - Rachel E. Carlisle
- Department of Medicine, Hamilton Centre for Kidney Research, McMaster University and St. Joseph’s Healthcare Hamilton, Hamilton, Ontario, Canada
| | - Chao Lu
- Department of Medicine, Hamilton Centre for Kidney Research, McMaster University and St. Joseph’s Healthcare Hamilton, Hamilton, Ontario, Canada
| | - Victor Tat
- Department of Medicine, Hamilton Centre for Kidney Research, McMaster University and St. Joseph’s Healthcare Hamilton, Hamilton, Ontario, Canada
| | - Jeffrey G. Dickhout
- Department of Medicine, Hamilton Centre for Kidney Research, McMaster University and St. Joseph’s Healthcare Hamilton, Hamilton, Ontario, Canada
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11
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Sun D, Zhang M, Li Y, Mei S, Qin J, Yan J. c‑Jun/Ap‑1 is upregulated in an Ang II‑induced abdominal aortic aneurysm formation model and mediates Chop expression in mouse aortic smooth muscle cells. Mol Med Rep 2019; 19:3459-3468. [PMID: 30864718 PMCID: PMC6472129 DOI: 10.3892/mmr.2019.10017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Accepted: 02/08/2019] [Indexed: 01/30/2023] Open
Abstract
Abdominal aortic aneurysm (AAA) is an asymptomatic, potentially lethal disease whose ruptures have a high mortality rate. An effective pharmacological approach to decrease expansion or prevent the rupture of AAAs in humans remains lacking. Previous studies have suggested that activator protein 1 (c-Jun/AP-1) and C/EBP homologous protein (Chop) are involved in the development of AAA. The purpose of the present study was to investigate whether c-Jun/AP-1 mediates Chop overexpression in AAA. c-Jun/AP-1 and Chop protein levels were determined in an angiotensin II (Ang II)-induced AAA model using apolipoprotein E-deficient mice. Additionally, mouse aortic smooth muscle cells (MOVAS cell line) were treated with Ang II. Apoptosis was evaluated via TUNEL assay, MOVAS cell migration ability was assessed by monolayer wound healing assay and the levels of c-Jun/AP-1 and Chop were determined by western blotting, immunofluorescence and immunocytochemical assays. Following c-Jun silencing using c-Jun-specific small interfering (si)RNA, Chop expression was evaluated. Furthermore, chromatin immunoprecipitation (ChIP) was used to investigate whether c-Jun/Ap-1 binds directly to the DNA damage-inducible transcript 3 protein (Ddit3) promoter. It was observed that c-Jun/AP-1 and Chop were synchronously overexpressed in Ang II-induced AAA and Ang II-treated cells, and that apoptosis and migration were induced by Ang II. In addition, Chop was suppressed when c-Jun was silenced by targeted siRNA. Notably, the ChIP assay demonstrated that the DNA fragments pulled down by primary antibodies against c-Jun/Ap-1 were able to be amplified by (Ddit3) promoter-specific primers. c-Jun/AP-1 may therefore mediate Chop expression in MOVAS cells via Ddit3. These results suggested that c-Jun/AP-1 may be a novel target for AAA therapy.
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Affiliation(s)
- Dating Sun
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Mingxi Zhang
- Division of Cardiology, Department of Internal Medicine, Wuhan Hospital of Traditional Chinese Medicine, Wuhan, Hubei 430030, P.R. China
| | - Yuanyuan Li
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Shuai Mei
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Jin Qin
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Jiangtao Yan
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
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12
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Wu Y, Yue Y, Fu S, Li Y, Wu D, Lv J, Yang D. Icariside II prevents hypertensive heart disease by alleviating endoplasmic reticulum stress via the PERK/ATF-4/CHOP signalling pathway in spontaneously hypertensive rats. J Pharm Pharmacol 2018; 71:400-407. [PMID: 30456794 DOI: 10.1111/jphp.13041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 10/20/2018] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Reducing endoplasmic reticulum stress (ERS)-induced cardiomyocyte apoptosis is a key strategy for preventing hypertensive heart disease. In our previous study, Icariside II can improve left ventricular remodelling in spontaneously hypertensive rats (SHRs). This study aims to determine whether Icariside II can exert its effect by inhibiting ERS-induced cardiomyocyte apoptosis via the PERK/ATF-4/CHOP signalling pathway. METHODS Spontaneously hypertensive rats were randomly divided into model group and Icariside II groups. The rats in the Icariside II groups were intragastrically administrated with Icariside II 4, 8 and 16 mg/kg from 14 to 26 week-age, respectively. The left ventricular function was measured at the 18, 22 and 26 week-age by small animal ultrasound. At the end of the 26th week, cardiomyocyte apoptosis was analysed and the levels of GRP78, PERK, ATF-4 and CHOP gene and protein were detected. KEY FINDINGS The function of left ventricular became declined with age in SHRs, but improved in Icariside II groups. Myocardial apoptosis was aggravated in SHRs, but alleviated in Icariside II groups. Icariside II could reduce the levels of GRP78, PERK, ATF-4, CHOP gene and protein that increased in SHRs. CONCLUSIONS Icariside II prevents hypertensive heart disease by alleviating ERS-induced cardiomyocyte apoptosis, and its mechanism is related to the impediment of the PERK/ATF-4/CHOP signalling pathway.
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Affiliation(s)
- Yuting Wu
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Yun Yue
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Shu Fu
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Yeli Li
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Dongqing Wu
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Junyuan Lv
- Department of Breast and Thyroid Surgery, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou, China
| | - Danli Yang
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
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13
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Biernacki M, Łuczaj W, Jarocka-Karpowicz I, Ambrożewicz E, Toczek M, Skrzydlewska E. The Effect of Long-Term Administration of Fatty Acid Amide Hydrolase Inhibitor URB597 on Oxidative Metabolism in the Heart of Rats with Primary and Secondary Hypertension. Molecules 2018; 23:E2350. [PMID: 30223427 PMCID: PMC6225141 DOI: 10.3390/molecules23092350] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 09/04/2018] [Accepted: 09/12/2018] [Indexed: 01/24/2023] Open
Abstract
Fatty acid amide hydrolase (FAAH) inhibitor [3-(3-carbamoylphenyl)phenyl] N-cyclohexylcarbamate (URB597) may influence redox balance and blood pressure through the modulation of endocannabinoids levels. Therefore, this study aimed to compare changes in oxidative metabolism and apoptosis in the hearts of rats with spontaneous hypertension (SHR) and secondary hypertension (11-deoxycorticosterone acetate; DOCA-salt rats) treated by URB597 via intraperitoneal injection for 14 days. The results showed that URB597 decreased the activity of NADPH and xanthine oxidases in both groups of rats. Moreover, in the heart of SHR rats, URB597 led to an increase of enzymatic and nonenzymatic antioxidant activity and levels (catalase, vitamin C, glutathione/glutathione disulfide [GSH/GSSG]) and upregulation of the thioredoxin system; however, NRf2 expression was downregulated. The opposite effect in relation to Nrf2 activity and the thioredoxin system was observed in DOCA-salt rats after URB597 administration. Despite improvement in antioxidant parameters, URB597 enhanced oxidative modifications of phospholipids (4-hydroxynonenal and isoprostanes) and proteins (carbonyl groups) in SHR heart, whereas 4-hydroxynonenal and carbonyl groups levels decreased in the heart of DOCA-salt rats. Obtained results suggest that examined lipid mediators are involved in peroxisome proliferator-activated receptors (PPAR)-independent and PPAR-dependent modulation of cardiac inflammatory reactions. Furthermore, decreased expression of pro-apoptotic proteins (Bax and caspase 3 and 9) was observed after URB597 administration in the heart of both groups of hypertensive rats, whereas expression of the antiapoptotic protein (Bcl-2) increased in SHR rats. Long-term administration of URB597 altered cardiac redox status depending on the type of hypertension. URB597 enhanced oxidative metabolism and reduced pro-apoptotic factors in the heart of SHR rats, increasing the probability of heart metabolic disorders occurrence or progression.
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Affiliation(s)
- Michał Biernacki
- Department of Analytical Chemistry, Medical University of Bialystok, Mickiewicza 2D, 15-222 Bialystok, Poland.
| | - Wojciech Łuczaj
- Department of Analytical Chemistry, Medical University of Bialystok, Mickiewicza 2D, 15-222 Bialystok, Poland.
| | - Iwona Jarocka-Karpowicz
- Department of Analytical Chemistry, Medical University of Bialystok, Mickiewicza 2D, 15-222 Bialystok, Poland.
| | - Ewa Ambrożewicz
- Department of Analytical Chemistry, Medical University of Bialystok, Mickiewicza 2D, 15-222 Bialystok, Poland.
| | - Marek Toczek
- Department of Experimental Physiology and Pathophysiology, Medical University of Bialystok, Mickiewicza 2A, 15-222 Bialystok, Poland.
| | - Elżbieta Skrzydlewska
- Department of Analytical Chemistry, Medical University of Bialystok, Mickiewicza 2D, 15-222 Bialystok, Poland.
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14
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Islam O, Patil P, Goswami SK, Razdan R, Inamdar MN, Rizwan M, Mathew J, Inceoglu B, Stephen Lee KS, Hwang SH, Hammock BD. Inhibitors of soluble epoxide hydrolase minimize ischemia-reperfusion-induced cardiac damage in normal, hypertensive, and diabetic rats. Cardiovasc Ther 2018; 35. [PMID: 28296232 DOI: 10.1111/1755-5922.12259] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 02/12/2017] [Accepted: 03/05/2017] [Indexed: 01/29/2023] Open
Abstract
AIM We designed a study to evaluate the cardioprotective effect of two soluble epoxide hydrolase (sEH) inhibitors, 1-(1-propanoylpiperidin-4-yl)-3-(4-trifluoromethoxy)phenyl)urea (TPPU) and trans-4-{4-[3-(4-trifluoromethoxyphenyl)-ureido]cyclohexyloxy}benzoic acid (t-TUCB), in ischemia-reperfusion (IR) model. METHODS Cardioprotective effects of the sEH inhibitors were evaluated against IR-induced myocardial damage in hearts from normal, hypertensive, and diabetic rats using Langendorff's apparatus. In addition, the effect of sEH inhibitors on endothelial function was evaluated in vitro and ex vivo using isolated rat thoracic aorta. RESULTS Ischemia-reperfusion (IR) increased the myocardial damage in hearts from normal rats. IR-induced myocardial damage was augmented in hearts isolated from hypertensive and diabetic rats. Myocardial damage as evident from increase in the activities of lactate dehydrogenase (LDH) and creatine kinase-MB (CK-MB) in heart perfusate was associated with significant decrease in the heart rate and developed tension, and increase in the resting tension in isolated heart. Both sEH inhibitors protected the heart in normal, hypertensive, and diabetic rats subjected to IR injury. The sEH inhibitor t-TUCB relaxed phenylephrine precontracted aorta from normal rats. Relaxant effect of acetylcholine (ACh) was reduced in aortas from diabetic and hypertensive rats compared to normal rats. Pretreatment of sEH inhibitors to diabetic and hypertensive rats increased relaxant effect of ACh on aortas isolated from these rats. CONCLUSIONS Prophylactic treatment with sEH inhibitors decreased myocardial damage due to IR, hypertension and diabetes, and decreased endothelial dysfunction created by diabetes and hypertension. Therefore, inhibitors of sEH are useful probes to study cardiovascular pathology, and inhibition of the sEH is a potential approach in the management of IR-induced cardiac damage and endothelial dysfunction-related cardiovascular disorders.
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Affiliation(s)
- Oliul Islam
- Department of Pharmacology, Al-Ameen College of Pharmacy, Bangalore, Karnataka, India
| | - Prashanth Patil
- Department of Pharmacology, Al-Ameen College of Pharmacy, Bangalore, Karnataka, India
| | - Sumanta K Goswami
- Department of Pharmacology, Al-Ameen College of Pharmacy, Bangalore, Karnataka, India.,Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Rema Razdan
- Department of Pharmacology, Al-Ameen College of Pharmacy, Bangalore, Karnataka, India
| | - Mohammed N Inamdar
- Department of Pharmacology, Al-Ameen College of Pharmacy, Bangalore, Karnataka, India.,Department of Pharmacology, College of Pharmacy, Jazan University, Jazan, KSA
| | - Mohammed Rizwan
- Department of Pharmacology, Al-Ameen College of Pharmacy, Bangalore, Karnataka, India
| | - Jubin Mathew
- Department of Pharmacology, Al-Ameen College of Pharmacy, Bangalore, Karnataka, India
| | - Bora Inceoglu
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Kin S Stephen Lee
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Sung H Hwang
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Bruce D Hammock
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, USA
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15
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Jin L, Piao ZH, Liu CP, Sun S, Liu B, Kim GR, Choi SY, Ryu Y, Kee HJ, Jeong MH. Gallic acid attenuates calcium calmodulin-dependent kinase II-induced apoptosis in spontaneously hypertensive rats. J Cell Mol Med 2017; 22:1517-1526. [PMID: 29266709 PMCID: PMC5824377 DOI: 10.1111/jcmm.13419] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 09/21/2017] [Indexed: 11/28/2022] Open
Abstract
Hypertension causes cardiac hypertrophy and leads to heart failure. Apoptotic cells are common in hypertensive hearts. Ca2+/calmodulin‐dependent protein kinase II (CaMKII) is associated with apoptosis. We recently demonstrated that gallic acid reduces nitric oxide synthase inhibition‐induced hypertension. Gallic acid is a trihydroxybenzoic acid and has been shown to have beneficial effects, such as anti‐cancer, anti‐calcification and anti‐oxidant activity. The purpose of this study was to determine whether gallic acid regulates cardiac hypertrophy and apoptosis in essential hypertension. Gallic acid significantly lowered systolic and diastolic blood pressure in spontaneously hypertensive rats (SHRs). Wheat germ agglutinin (WGA) and H&E staining revealed that gallic acid reduced cardiac enlargement in SHRs. Gallic acid treatment decreased cardiac hypertrophy marker genes, including atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP), in SHRs. The four isoforms, α, β, δ and γ, of CaMKII were increased in SHRs and were significantly reduced by gallic acid administration. Gallic acid reduced cleaved caspase‐3 protein as well as bax, p53 and p300 mRNA levels in SHRs. CaMKII δ overexpression induced bax and p53 expression, which was attenuated by gallic acid treatment in H9c2 cells. Gallic acid treatment reduced DNA fragmentation and the TUNEL positive cells induced by angiotensin II. Taken together, gallic acid could be a novel therapeutic for the treatment of hypertension through suppression of CaMKII δ‐induced apoptosis.
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Affiliation(s)
- Li Jin
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea.,Jilin Hospital Affiliated with Jilin University, Chuanying, Jilin, China
| | - Zhe Hao Piao
- The Second Hospital of Jilin University, Nanguan, Changchun, China
| | - Chun Ping Liu
- Jilin Hospital Affiliated with Jilin University, Chuanying, Jilin, China
| | - Simei Sun
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
| | - Bin Liu
- The Second Hospital of Jilin University, Nanguan, Changchun, China
| | - Gwi Ran Kim
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
| | - Sin Young Choi
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
| | - Yuhee Ryu
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
| | - Hae Jin Kee
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
| | - Myung Ho Jeong
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
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16
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Oxidative imbalance and kidney damage in spontaneously hypertensive rats: activation of extrinsic apoptotic pathways. Clin Sci (Lond) 2017; 131:1419-1428. [PMID: 28495910 DOI: 10.1042/cs20170177] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 05/05/2017] [Accepted: 05/11/2017] [Indexed: 02/07/2023]
Abstract
In both humans and animals, essential hypertension acts as a risk factor for subclinical kidney damage and precedes renal dysfunction. Several lines of evidence indicate that hypertension and oxidative stress are closely related. The increase in vascular oxidative stress plays a key role in the pathophysiological consequences of hypertension, including kidney disease. Our study examined this issue in spontaneously hypertensive rat (SHR), a reliable model of essential hypertension. We used SHR 20 weeks old when hypertension is stably developed, vascular remodeling started, but kidney function is preserved. We examined plasmatic pro-oxidant and antioxidant status showing a significant alteration in oxidative balance in SHR. As index of oxidative damage, we evaluated lipid peroxidation in kidney, liver, and skeletal muscle, detecting a significant rise in lipid peroxidation levels in all SHR tissues, particularly relevant in kidney. In addition, we analyzed the expression of cytoplasmic antioxidant enzymes, superoxide dismutase 1 (SOD1) and glutatione S-tranferasi P1 (GSTP1). In SHR liver, SOD1 expression slight increased while we have not detected any variation in other tissues. Concerning GSTP1, SHR renal tissues did not display variations in enzyme expression, while in the other tissues, we observed a significant increase in both monomeric and pro-apoptotic dimeric form of the enzyme. By analyzing apoptotic signal, we founded c-Jun N-terminal kinase (JNK) activation in all SHR tissues, but only kidney presented extrinsic apoptotic pathway activation. Our results suggest that, in hypertensive animals with preserved renal function, despite the remarkable oxidative damage of renal tissues, only the extrinsic apoptotic pathway is activated.
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17
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Shen X, Hu B, Xu G, Chen F, Ma R, Zhang N, Liu J, Ma X, Zhu J, Wu Y, Shen R. Activation of Nrf2/HO-1 Pathway by Glycogen Synthase Kinase-3β Inhibition Attenuates Renal Ischemia/Reperfusion Injury in Diabetic Rats. Kidney Blood Press Res 2017. [PMID: 28624830 DOI: 10.1159/000477947] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Diabetes mellitus can exacerbate renal ischemia-reperfusion (I/R) injury (RI/RI). The aim of the present study was to evaluate the protective effect of GSK-3β inhibition (TDZD-8) on I/R-induced renal injury through the Nrf2/HO-1 pathway in a streptozocin (STZ)-induced diabetic rat model. METHODS STZ-induced diabetic rats preconditioned with TDZD-8 and ZnPP were subjected to renal I/R. The extent of renal morphologic lesions. Renal function was assessed from blood urea nitrogen (BUN) and serum creatinine (Scr), as determined utlizing commercial kits. Oxidative stress and inflammatory activity in the kidney tissue was estimated from levels of malondialdehyde (MDA), interleukin-10 (IL-10), tumor necrosis factor-α (TNF-α), and nitric oxide (NO), as well as the activities of superoxide dismutase (SOD) and glutathione (GSH) using qRT-PCR and ELISA. The expressions of Nrf2, HO-1, Bcl-2 and NF-κB in the renal tissue were measured by qRT-PCR and western blotting. RESULTS I/R-induced renal inflammation was reduced significantly by TDZD-8 pretreatment. Preconditioning with TDZD-8 suppressed NF-κB expression and enhanced Bcl-2 expression in the renal tissue. The upregulated level of malondialdehyde (MDA), and reduced activities of superoxide dismutase (SOD) and glutathione (GSH) in I/R-shocked rats were markedly restored by TDZD-8 pretreatment. Furthermore, pretreatment with TDZD-8 enhanced activation of the Nrf2/HO-1 pathway in the renal tissue of diabetic RI/RI rats. CONCLUSION These findings suggest that preconditioning with TDZD-8 may protect the kidney from I/R-induced damage via the activation of the Nrf2/HO-1 pathway in STZ-induced diabetic rats. Further detailed studies are needed to further clarify the underlying mechanisms.
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Affiliation(s)
- Xiaohua Shen
- Department of Chemical Pathology, Urinary Surgery, Nephrology, Gynecology and Intensive Care Unit, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing University Affiliated TCM Hospital, Jiaxing, China
| | - Bo Hu
- Department of Chemical Pathology, Urinary Surgery, Nephrology, Gynecology and Intensive Care Unit, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing University Affiliated TCM Hospital, Jiaxing, China.,Diabetes Institute, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing, China
| | - Guangtao Xu
- Department of Pathology and Pathophysiology, Provincial Key Discipline of Pharmacology, Jiaxing University Medical College, Jiaxing, China.,Diabetes Institute, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing, China
| | - Fengjuan Chen
- Department of Chemical Pathology, Urinary Surgery, Nephrology, Gynecology and Intensive Care Unit, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing University Affiliated TCM Hospital, Jiaxing, China
| | - Ruifen Ma
- Department of Chemical Pathology, Urinary Surgery, Nephrology, Gynecology and Intensive Care Unit, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing University Affiliated TCM Hospital, Jiaxing, China
| | - Nenghua Zhang
- Department of Chemical Pathology, Urinary Surgery, Nephrology, Gynecology and Intensive Care Unit, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing University Affiliated TCM Hospital, Jiaxing, China
| | - Jie Liu
- Department of Chemical Pathology, Urinary Surgery, Nephrology, Gynecology and Intensive Care Unit, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing University Affiliated TCM Hospital, Jiaxing, China.,Diabetes Institute, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing, China
| | - Xiaoqin Ma
- Department of Chemical Pathology, Urinary Surgery, Nephrology, Gynecology and Intensive Care Unit, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing University Affiliated TCM Hospital, Jiaxing, China
| | - Jia Zhu
- Department of Pathology and Pathophysiology, Provincial Key Discipline of Pharmacology, Jiaxing University Medical College, Jiaxing, China
| | - Yuhong Wu
- Department of Chemical Pathology, Urinary Surgery, Nephrology, Gynecology and Intensive Care Unit, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing University Affiliated TCM Hospital, Jiaxing, China.,Diabetes Institute, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing, China
| | - Ruilin Shen
- Department of Chemical Pathology, Urinary Surgery, Nephrology, Gynecology and Intensive Care Unit, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing University Affiliated TCM Hospital, Jiaxing, China.,Diabetes Institute, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing, China
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18
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Hong S, Zhang X, Zhang X, Liu W, Fu Y, Liu Y, Shi Z, Chi J, Zhao M, Yin X. Role of the calcium sensing receptor in cardiomyocyte apoptosis via mitochondrial dynamics in compensatory hypertrophied myocardium of spontaneously hypertensive rat. Biochem Biophys Res Commun 2017; 487:728-733. [PMID: 28450119 DOI: 10.1016/j.bbrc.2017.04.126] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 04/23/2017] [Indexed: 01/01/2023]
Abstract
Calcium sensing receptor (CaSR) mediates pathological cardiac hypertrophy. Mitochondria maintain their function through fission and fusion and disruption of mitochondrial dynamic is linked to various cardiac diseases. This study examined how inhibition of CaSR by the inhibitor Calhex231 affected the mitochondrial dynamics in a hypertensive model in rats. Spontaneously hypertensive rats (SHRs) and Wistar Kyoto (WKY) rats were used in this study. Cardiac function and blood pressure was evaluated at the end of the study. SHRs showed increases in the ratio of heart weight to body weight and the levels of CaSR; all of these increases were suppressed by Calhex231. Additionally, Calhex231 treatment of SHRs changed the expression of proteins involved in mitochondrial dynamics. Our results demonstrated that CaSR activation induced cardiomyocyte apoptosis through the mitochondrial dynamics mediated apoptotic pathway in hypertensive hearts.
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Affiliation(s)
- Siting Hong
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - Xin Zhang
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - Xiaohui Zhang
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - Wenxiu Liu
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - Yu Fu
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - Yue Liu
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - Zhiyu Shi
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - Jinyu Chi
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - Meng Zhao
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - Xinhua Yin
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China.
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19
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Khater NA, Selim SA, Abd El-Baset SA, Abd El Hameed SH. Therapeutic effect of mesenchymal stem cells on experimentally induced hypertensive cardiomyopathy in adult albino rats. Ultrastruct Pathol 2016; 41:36-50. [PMID: 28029272 DOI: 10.1080/01913123.2016.1260080] [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: 01/19/2023]
Abstract
Hypertensive heart diseases affect millions of people worldwide. We aimed to investigate the hypertensive left ventricular histological changes and assess the effectiveness of bone marrow derived mesenchymal stem cells (MSCs) therapy in the treatment of hypertensive cardiomyopathy. Adult male albino rats were assigned into two groups: group I (control), group II (Experimental) subdivided into subgroup IIa (hypertensive) and subgroup IIb (stem cell therapy). Left ventricles (LVs) were processed for light and electron microscope. Mallory's trichrome and immunostaining for caspase-3 and desmin were carried out. Hypertension caused left ventricular histological and immunohistochemical changes that had been effectively improved by MSCs therapy.
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Affiliation(s)
- Nariman A Khater
- a Department of Histology and Cell Biology, Faculty of Medicine , Zagazig University , Zagazig , Egypt
| | - Sally A Selim
- a Department of Histology and Cell Biology, Faculty of Medicine , Zagazig University , Zagazig , Egypt
| | - Samia A Abd El-Baset
- a Department of Histology and Cell Biology, Faculty of Medicine , Zagazig University , Zagazig , Egypt
| | - Samar H Abd El Hameed
- a Department of Histology and Cell Biology, Faculty of Medicine , Zagazig University , Zagazig , Egypt
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Qin Y, Wang Y, Liu O, Jia L, Fang W, Du J, Wei Y. Tauroursodeoxycholic Acid Attenuates Angiotensin II Induced Abdominal Aortic Aneurysm Formation in Apolipoprotein E-deficient Mice by Inhibiting Endoplasmic Reticulum Stress. Eur J Vasc Endovasc Surg 2016; 53:337-345. [PMID: 27889204 DOI: 10.1016/j.ejvs.2016.10.026] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 10/27/2016] [Indexed: 12/14/2022]
Abstract
OBJECTIVE/BACKGROUND Abdominal aortic aneurysm (AAA) is characterised by the infiltration of smooth muscle cell (SMC) apoptosis, inflammatory cells, neovascularisation, and degradation of the extracellular matrix. Previous work has shown that endoplasmic reticulum (ER) stress and SMC apoptosis were increased both in a mouse model and human thoracic aortic aneurysm. However, whether the ER stress is activated in AAA formation and whether suppressing ER stress attenuates AAA is unknown. METHODS Human AAA and control aorta samples were collected. Expression of ER stress chaperones glucose-regulated protein (GRP)-78 and GRP-94 was detected by immunohistochemical staining. The effect of ER stress inhibitor tauroursodeoxycholic acid (TUDCA) on AAA formation in angiotensin (Ang) II induced apolipoprotein E-/- mice was explored. Elastin staining was used to observe the rupture of elastic fragmentation. Immunohistochemistry and Western blot analysis were performed, to detect the protein expression of ER stress chaperones and apoptosis molecules. RESULTS There was significant upregulation of GRP-78 and GRP-94 in aneurysmal areas of human AAA and Ang II induced ApoE-/- mice (p < .05). TUDCA significantly attenuated the maximum diameters of abdominal aortas in Ang II induced ApoE-/- mice (p < .05). TUDCA significantly reduced expression of ER stress chaperones and the apoptotic cell numbers (p < .05). Furthermore, TUDCA significantly reduced expression of apoptosis molecules, such as caspase-3, caspase-12, C/EBP homologous protein, c-Jun N-terminal kinase activating transcription factor 4, X-box binding protein, and eukaryotic initiation factor 2α in Ang II induced ApoE-/- mice (p < .05). CONCLUSION The results suggest that ER stress is involved in human and Ang II induced AAA formation in ApoE-/- mice. TUDCA attenuates Ang II induced AAA formation in ApoE-/- mice by inhibiting ER stress mediated apoptosis.
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Affiliation(s)
- Y Qin
- The Key Laboratory of Upper Airway Dysfunction-related Cardiovascular Diseases, Beijing An Zhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China; The Key Laboratory of Remodeling-related Cardiovascular Diseases, Ministry of Education, Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing An Zhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China.
| | - Y Wang
- The Key Laboratory of Upper Airway Dysfunction-related Cardiovascular Diseases, Beijing An Zhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China; The Key Laboratory of Remodeling-related Cardiovascular Diseases, Ministry of Education, Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing An Zhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China
| | - O Liu
- The Key Laboratory of Remodeling-related Cardiovascular Diseases, Ministry of Education, Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing An Zhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China
| | - L Jia
- The Key Laboratory of Remodeling-related Cardiovascular Diseases, Ministry of Education, Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing An Zhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China
| | - W Fang
- The Key Laboratory of Upper Airway Dysfunction-related Cardiovascular Diseases, Beijing An Zhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China
| | - J Du
- The Key Laboratory of Remodeling-related Cardiovascular Diseases, Ministry of Education, Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing An Zhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China
| | - Y Wei
- The Key Laboratory of Upper Airway Dysfunction-related Cardiovascular Diseases, Beijing An Zhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China.
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Zhong Y, Zhang Y, Wang P, Gao H, Xu C, Li H. V8 induces apoptosis and the endoplasmic reticulum stress response in human multiple myeloma RPMI 8226 cells via the PERK-eIF2α-ATF4 signaling pathway. Oncol Lett 2016; 12:2702-2709. [PMID: 27703527 DOI: 10.3892/ol.2016.5005] [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] [Received: 04/28/2015] [Accepted: 06/02/2016] [Indexed: 12/17/2022] Open
Abstract
Multiple myeloma (MM) is a fatal hematological cancer characterized by clonal plasma cell proliferation in the bone marrow. MM has an increasing global incidence and a poor prognosis. There are limited treatment options available for MM, and this is further compounded by the development of drug resistance. The present study demonstrated that 7-{4-[Bis-(2-hydroxyethyl)-amino]-butoxy}-5-hydroxy-8-methoxy-2-phenylchromen-4-one (V8), a novel synthetic flavonoid, induced apoptosis in human MM RPMI 8226 cells in a dose- and time-dependent manner, using cell viability assays and flow cytometry. Subsequently, V8-induced apoptosis in RPMI 8226 cells was revealed to occur via mitochondria-mediated pathways. The activity of caspase-3, -8 and -9, and the mRNA level of B-cell lymphoma 2 (Bcl-2) and B-cell lymphoma-extra large were greatly increased, while the expression of Bcl-2-like protein 4 and BH3 interacting domain death agonist was significantly decreased in RPMI 8226 cells following V8 treatment, as observed using quantitative polymerase chain reaction (qPCR). In addition, western blotting revealed that the release of mitochondrial cytochrome c into the cytosol was promoted by V8. Furthermore, a clear alteration in endoplasmic reticulum (ER) stress was observed in cells treated with V8; upregulation of glucose-regulated protein (GRP) 78, GRP94, C/EBP homologous protein, cleavage of caspase-12, phosphorylated protein kinase RNA-like endoplasmic reticulum kinase (p-PERK), phosphorylated eukaryotic initiation factor 2α (p-eIF2α) and activating transcription factor 4 (ATF4) was observed with qPCR and western blotting, suggesting that V8-induced apoptosis is involved in the ER stress response. Overall, the present results demonstrated that V8 induced apoptosis in human MM RPMI 8226 cells via the PERK-eIF2α-ATF4 ER stress response pathway, which may provide novel directions for exploiting this compound as a potential anti-neoplastic drug for MM therapy.
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Affiliation(s)
- Yaping Zhong
- Department of Hematology, Zhumadian Central Hospital, Zhumadian, Henan 463000, P.R. China
| | - Yonggang Zhang
- Deanery, Zhumadian Central Hospital, Zhumadian, Henan 463000, P.R. China
| | - Ping Wang
- Department of Hematology, Zhumadian Central Hospital, Zhumadian, Henan 463000, P.R. China
| | - Hongxiu Gao
- Department of Hematology, Zhumadian Central Hospital, Zhumadian, Henan 463000, P.R. China
| | - Chunling Xu
- Department of Hematology, Zhumadian Central Hospital, Zhumadian, Henan 463000, P.R. China
| | - Hui Li
- Department of Hematology, Zhumadian Central Hospital, Zhumadian, Henan 463000, P.R. China
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Ye W, Zhu S, Liao C, Xiao J, Wu Q, Lin Z, Chen J. Advanced oxidation protein products induce apoptosis of human chondrocyte through reactive oxygen species-mediated mitochondrial dysfunction and endoplasmic reticulum stress pathways. Fundam Clin Pharmacol 2016; 31:64-74. [PMID: 27483042 DOI: 10.1111/fcp.12229] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 07/04/2016] [Accepted: 07/29/2016] [Indexed: 12/25/2022]
Abstract
Advanced oxidation production products (AOPPs) have been confirmed to accumulate in patients with rheumatoid arthritis (RA). Previous study demonstrated that AOPPs could accelerate cartilage destruction in rabbit arthritis model. However, the effect of AOPP stimulation on apoptosis of human chondrocyte and the underlying mechanisms remains unclear. This study demonstrated that exposure of chondrocyte to AOPPs resulted in cell apoptosis. AOPP stimulation triggered reactive oxygen species (ROS) production, which induced mitochondrial dysfunction and endoplasmic reticulum stress (ER stress) resulted in caspase activation. Furthermore, an antioxidant, N-acetylcysteine, markedly blocked these signals. Our study demonstrated that AOPPs induce apoptosis via ROS-related mitochondria- and ER-dependent signals in human chondrocyte. Targeting AOPP-triggered ROS generation might be as a promising option for patients with RA.
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Affiliation(s)
- Wenbin Ye
- Department of Orthopaedic Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Siyuan Zhu
- Department of Orthopaedic Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Congrui Liao
- Department of Orthopaedic Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Jun Xiao
- Department of Orthopedic Joint Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Qian Wu
- Department of Orthopaedic Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Zhen Lin
- Department of Orthopaedic Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
| | - Jianting Chen
- Department of Orthopaedic Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China
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Yang TY, Yen CC, Lee KI, Su CC, Yang CY, Wu CC, Hsieh SS, Ueng KC, Huang CF. Molybdenum induces pancreatic β-cell dysfunction and apoptosis via interdependent of JNK and AMPK activation-regulated mitochondria-dependent and ER stress-triggered pathways. Toxicol Appl Pharmacol 2016; 294:54-64. [PMID: 26806093 DOI: 10.1016/j.taap.2016.01.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/29/2015] [Accepted: 01/19/2016] [Indexed: 12/25/2022]
Abstract
Molybdenum (Mo), a well-known toxic environmental and industrial pollutant, causes adverse health effects and diseases in humans and has received attention as a potential risk factor for DM. However, the roles of Mo in the mechanisms of the toxicological effects in pancreatic β-cells are mostly unclear. In this study, the results revealed dysfunction of insulin secretion and apoptosis in the pancreatic β-cell-derived RIN-m5F cells and the isolated mouse islets in response to Mo. These effects were accompanied by a mitochondria-dependent apoptotic signals including a decreased in the MMP, an increase in cytochrome c release, and the activation of caspase cascades and PARP. In addition, ER stress was triggered as indicated by several key molecules of the UPR. Furthermore, exposure to Mo induced the activation of ERK1/2, JNK, AMPKα, and GSK3-α/β. Pretreatment with specific pharmacological inhibitors (in RIN-m5F cells and isolated mouse islets) of JNK (SP600125) and AMPK (Compound C) or transfection with si-RNAs (in RIN-m5F cells) specific to JNK and AMPKα effectively prevented the Mo-induced apoptosis and related signals, but inhibitors of ERK1/2 and GSK3-α/β (PD98059 and LiCl, respectively) did not reverse the Mo-induced effects. Additionally, both the inhibitors and specific si-RNAs could suppress the Mo-induced phosphorylation of JNK and AMPKα each other. Taken together, these results suggest that Mo exerts its cytotoxicity on pancreatic β-cells by inducing dysfunction and apoptosis via interdependent JNK and AMPK activation downstream-regulated mitochondrial-dependent and ER stress-triggered apoptosis pathways.
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Affiliation(s)
- Tsung-Yuan Yang
- Institute of Medicine, Chung Shan Medical University, Taichung 402, Taiwan; Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung 402, Taiwan
| | - Cheng-Chieh Yen
- Department of Occupational Safety and Health, College of Health Care and Management, Chung Shan Medical University, Taichung 402, Taiwan; Department of Occupational Medicine, Chung Shan Medical University Hospital, Taichung 402, Taiwan
| | - Kuan-I Lee
- Department of Emergency, Taichung Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taichung 427, Taiwan
| | - Chin-Chuan Su
- Department of Otorhinolaryngology, Head and Neck Surgery, Changhua Christian Hospital, Changhua County 500, Taiwan; Graduate Institute of Basic Medical Science, School of Medicine, College of Medicine, China Medical University, Taichung 404, Taiwan
| | - Ching-Yao Yang
- Department of Surgery, National Taiwan University Hospital, Taipei 100, Taiwan; Department of Surgery, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Chin-Ching Wu
- Department of Public Health, China Medical University, Taichung 404, Taiwan
| | - Shang-Shu Hsieh
- Department of Emergency, Taichung Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taichung 427, Taiwan.
| | - Kwo-Chang Ueng
- Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung 402, Taiwan; School of Medicine, Chung Shan Medical University, Taichung 402, Taiwan.
| | - Chun-Fa Huang
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung 404, Taiwan.
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Luo T, Chen B, Wang X. 4-PBA prevents pressure overload-induced myocardial hypertrophy and interstitial fibrosis by attenuating endoplasmic reticulum stress. Chem Biol Interact 2015; 242:99-106. [PMID: 26428355 DOI: 10.1016/j.cbi.2015.09.025] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 09/01/2015] [Accepted: 09/24/2015] [Indexed: 01/14/2023]
Abstract
Our previous study indicated that attenuation of endoplasmic reticulum (ER) stress by administration of 4-phenylbutyric acid (4-PBA) could prevent cardiac rupture and remodeling in a mouse model of myocardial infarction (MI). However, whether 4-PBA is protective in hypertrophic heart disease is unclear. Thus, we tested the therapeutic effect of 4-PBA on pressure-overload induced myocardial hypertrophy. Transverse aortic constriction (TAC) was used to create myocardial hypertrophy in C57BL/6 male mice for 4 weeks. Immediately after surgery, the mice were administrated either 4-PBA (20 mg/kg/day) or 0.9% NaCl by intraperitoneal injection. At the end of 4 weeks, the mice underwent high-resolution echocardiographic imaging. Our results showed that both the left ventricular posterior wall thickness at end systole (LVPWs) and diastole (LVPWd) were increased in the TAC group, compared to control. 4-PBA administration attenuated hypertrophy and decreased the heart weight over body weight ratio. Masson's trichrome staining showed that myocardial interstitial fibrosis and collagen deposition were also decreased by 4-PBA. We next detected the ER stress response in the heart tissues of TAC mice in different time points. Western blotting showed that the expression of ER stress marker, GRP78, CHOP and phosphor-PERK, were persistently increased 4 weeks after TAC. The treatment of 4-PBA inhibited the expression of ER stress markers. We also demonstrated that the 4-PBA at 20 mg/kg/day had no effect on histone 3 deacetylation inhibition, while attenuating ER stress and TAC-induced hypertrophy. These findings suggest that 4-PBA may be a therapeutic strategy to consider in preventing pressure-overload induced myocardial hypertrophy and interstitial fibrosis by selectively attenuating ER stress.
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Affiliation(s)
- Tao Luo
- Division of Cardiology, Department of Medicine, University of California Irvine Medical Center, Orange, CA 92868, USA.
| | - Baihe Chen
- Department of Molecular Biology & Biochemistry, University of California Irvine, Irvine, CA 92697, USA
| | - Xianbao Wang
- Department of Cardiology, Zhujiang Hospital of Southern Medical University, Guangzhou, 510282, PR China
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