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Chatterjee BK, Alam M, Chakravorty A, Lacy SM, Rech J, Brooks CL, Arvan PD, Truttmann MC. Small molecule FICD inhibitors suppress endogenous and pathologic FICD-mediated protein AMPylation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.13.603377. [PMID: 39071275 PMCID: PMC11275912 DOI: 10.1101/2024.07.13.603377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
The AMP transferase, FICD, is an emerging drug target finetuning stress signaling in the endoplasmic reticulum (ER). FICD is a bi-functional enzyme, catalyzing both AMP addition (AMPylation) and removal (deAMPylation) from the ER resident chaperone BiP/GRP78. Despite increasing evidence linking excessive BiP/GRP78 AMPylation to human diseases, small molecules to inhibit pathogenic FICD variants are lacking. Using an in-vitro high-throughput screen, we identify two small-molecule FICD inhibitors, C22 and C73. Both molecules significantly inhibit FICD-mediated BiP/GRP78 AMPylation in intact cells while only weakly inhibiting BiP/GRP78 deAMPylation. C22 and C73 also efficiently inhibit pathogenic FICD variants and improve proinsulin processing in β cells. Our study identifies and validates FICD inhibitors, highlighting a novel therapeutic avenue against pathologic protein AMPylation.
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Albtoosh A, Karawya F, Al-Naymat W, Al-Qaitat A. Potential Protective Effect of Spirulina Platensis on Sodium Arsenite Induced Cardiotoxicity in Male Rats. Tissue Barriers 2021; 10:1983330. [PMID: 34615441 DOI: 10.1080/21688370.2021.1983330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Background: Sodium arsenite is a dangerous bio-accumulative poison affecting a large number of people as well as animals throughout the world. It is used clinically in the treatment of certain medical conditions, but due to its harmful damage to different tissues and mainly the cardiotoxicity, its medical application is limited.Aim: This study was conducted to investigate the protective effects of spirulina on cardiotoxicity induced by sodium arsenite biochemically and histologically.Methods: 30 young adult male albino rats were randomly equally divided into three groups 10 animals each. Group I (control), Group II Arsenic intoxicated (10 mg/kg/day/ 4 weeks), Group III spirulina protected animals (concomitant sodium arsenite 10 mg/kg/day/ 4 weeks and spirulina 200 mg/kg/day/ 4 weeks).Results: It was evident from the study that arsenic exposure exerted a significant increase in cardiac enzyme levels, serum creatine kinase MB (CKMB) and troponin. Concomitant treatment with spirulina is considerably recovered their serum levels. Histological alterations associated with arsenite treated animals are significantly decreased after using spirulina.Conclusions: The results of the present study showed that use of spirulina could alleviate the toxic effects on the heart following exposure to arsenic toxicity.
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Affiliation(s)
| | - Fardous Karawya
- College of Medicine, Mutah University, Jordan.,Faculty of Medicine, Alexandria University, Alexandria, Egypt
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Zhao L, Feng Y, Xu ZJ, Zhang NY, Zhang WP, Zuo G, Khalil MM, Sun LH. Selenium mitigated aflatoxin B1-induced cardiotoxicity with potential regulation of 4 selenoproteins and ferroptosis signaling in chicks. Food Chem Toxicol 2021; 154:112320. [PMID: 34116104 DOI: 10.1016/j.fct.2021.112320] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 04/30/2021] [Accepted: 05/31/2021] [Indexed: 01/18/2023]
Abstract
The aim of the present study was to explore the underlying mechanism of selenium (Se)-mediated detoxification of aflatoxin B1 (AFB1)-induced cardiotoxicity in chicks. A Se-deficient, corn-soybean meal-basal diet (36 μg Se/kg, BD) and three test diets (BD+1.0 mg AFB1/kg, 0.3 mg Se/kg, or 1.0 mg AFB1/kg+0.3 mg Se/kg) were used in a 3-wk 2 × 2 factorial design trial (n = 30 chicks/group). Dietary AFB1 led to induced (P < 0.05) serum creatine kinase and creatine kinase MB isoenzyme activities and heart histopathologic lesions. However, Se deficiency aggravated most of these alterations induced by AFB1. Moreover, mRNA levels of two ferroptosis activators (solute carrier family 11 Member 2 and transferrin) were upregulated (P < 0.05) in the AFB1-treated groups. Additionally, Se deficiency reduced (P < 0.05) glutathione peroxidase (GPX) 3 and thioredoxin reductase 3 mRNA and GPX activity but increased (P < 0.05) selenoprotein M and selenophosphate synthetase 2 mRNA in the heart in AFB1-administered groups. The in vitro study showed that Se alleviated (P < 0.05) AFB1-reduced cell viability and induced (P < 0.05) ROS and ferroptosis in H9C2 cardiac cells. It also downregulated (P < 0.05) two ferroptosis activators (long-chain acyl-CoA synthetase 4 and solute carrier family 11 Member 2) in the AFB1-treated groups in the H9C2 cells. In conclusion, this study illustrated that Se alleviates AFB1-induced cardiotoxicity and cardiomyocyte damage potentially related to the regulation of redox status, 4 selenoproteins, and ferroptosis-related signaling.
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Affiliation(s)
- Ling Zhao
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Yue Feng
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Zi-Jian Xu
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Ni-Ya Zhang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Wan-Po Zhang
- Department of Veterinary Pathology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Gang Zuo
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Mahmoud Mohamed Khalil
- Animal Production Department, Faculty of Agriculture, Benha University, 13736, Egypt; Monogastric Research Centre, School of Agriculture and Environment, Massey University, Palmerston North, 4442, New Zealand
| | - Lv-Hui Sun
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
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Zhao Z, Li J, Zheng B, Liang Y, Shi J, Zhang J, Han X, Chu L, Chu X, Gao Y. Ameliorative effects and mechanism of crocetin in arsenic trioxide‑induced cardiotoxicity in rats. Mol Med Rep 2020; 22:5271-5281. [PMID: 33173984 PMCID: PMC7646993 DOI: 10.3892/mmr.2020.11587] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 08/20/2020] [Indexed: 01/15/2023] Open
Abstract
Arsenic trioxide (ATO) is commonly used to treat patients with acute promyelocytic leukemia since it was authorized by the U.S. Food and Drug Administration in the 1970s, but its applicability has been limited by its cardiotoxic effects. Therefore, the aim of the present study was to investigate the cardioprotective effects and underlying mechanism of crocetin (CRT), the critical ingredient of saffron. Sprague-Dawley rats were then randomly divided into four groups (n=10/group): i) Control group; ii) ATO group, iii) CRT-low (20 mg/kg) group; and iv) CRT-high (40 mg/kg) group. Rats in the Control and ATO groups were intraperitoneally injected with equal volumes of 0.9% sodium chloride solution, and CRT groups were administered with either 20 and 40 mg/kg CRT. Following 6 h, all groups except the Control group were intraperitoneally injected with 5 mg/kg ATO over 10 days. Cardiotoxicity was indicated by changes in electrocardiographic (ECG) patterns, morphology and marker enzymes. Histomorphological changes in the heart tissue were observed by pathological staining. The levels of superoxide dismutase, glutathione peroxidase, malondialdehyde and catalase in the serum were analyzed using colometric commercial assay kits, and the levels of reactive oxygen species in the heart tissue were detected using the fluorescent probe dihydroethidium. The expression levels of inflammatory factors and activities of apoptosis-related proteins were analyzed using immunohistochemistry. The protein expression levels of silent information regulator of transcription 1 were measured using western blotting. Cardiotoxicity was induced in male Sprague-Dawley rats with ATO (5 mg/kg). CRT (20 and 40 mg/kg) and ATO were co-administered to evaluate possible cardioprotective effects. CRT significantly reduced the heart rate and J-point elevation induced by ATO in rats. Histological changes were evaluated via hematoxylin and eosin staining. CRT decreased the levels of creatine kinase and lactate dehydrogenase, increased the activities of superoxide dismutase, glutathione-peroxidase and catalase, and decreased the levels of malondialdehyde and reactive oxygen species. Moreover, CRT downregulated the expression levels of the pro-inflammatory factors IL-1, TNF-α, IL-6, Bax and p65, as well as increased the expression of Bcl-2. It was also identified that CRT enhanced silent information regulator of transcription 1 protein expression. Thus, the present study demonstrated that CRT treatment effectively ameliorated ATO-induced cardiotoxicity. The protective effects of CRT can be attributed to the inhibition of oxidative stress, inflammation and apoptosis. Therefore, CRT represents a promising therapeutic method for improving the cardiotoxic side effects caused by ATO treatment, and additional clinical applications are possible, but warrant further investigation.
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Affiliation(s)
- Zhifeng Zhao
- Department of Pharmaceutics, School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, P.R. China
| | - Jinghan Li
- Department of Preventive Medicine, School of Basic Medicine, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, P.R. China
| | - Bin Zheng
- Department of Pharmaceutics, School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, P.R. China
| | - Yingran Liang
- Department of Pharmaceutics, School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, P.R. China
| | - Jing Shi
- Department of Pharmacy, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Jianping Zhang
- Hebei Key Laboratory of Integrative Medicine on Liver‑Kidney Patterns, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, P.R. China
| | - Xue Han
- Department of Pharmaceutics, School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, P.R. China
| | - Li Chu
- Department of Pharmaceutics, School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, P.R. China
| | - Xi Chu
- Department of Pharmacy, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Yonggang Gao
- Department of Preventive Medicine, School of Basic Medicine, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, P.R. China
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Ma W, Wei S, Zhang B, Li W. Molecular Mechanisms of Cardiomyocyte Death in Drug-Induced Cardiotoxicity. Front Cell Dev Biol 2020; 8:434. [PMID: 32582710 PMCID: PMC7283551 DOI: 10.3389/fcell.2020.00434] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 05/08/2020] [Indexed: 01/08/2023] Open
Abstract
Homeostatic regulation of cardiomyocytes plays a crucial role in maintaining the normal physiological activity of cardiac tissue. Severe cardiotoxicity results in cardiac diseases including but not limited to arrhythmia, myocardial infarction and myocardial hypertrophy. Drug-induced cardiotoxicity limits or forbids further use of the implicated drugs. Such drugs that are currently available in the clinic include anti-tumor drugs (doxorubicin, cisplatin, trastuzumab, etc.), antidiabetic drugs (rosiglitazone and pioglitazone), and an antiviral drug (zidovudine). This review focused on cardiomyocyte death forms and related mechanisms underlying clinical drug-induced cardiotoxicity, including apoptosis, autophagy, necrosis, necroptosis, pryoptosis, and ferroptosis. The key proteins involved in cardiomyocyte death signaling were discussed and evaluated, aiming to provide a theoretical basis and target for the prevention and treatment of drug-induced cardiotoxicity in the clinical practice.
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Affiliation(s)
- Wanjun Ma
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Shanshan Wei
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Bikui Zhang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Wenqun Li
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
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Pichler G, Grau-Perez M, Tellez-Plaza M, Umans J, Best L, Cole S, Goessler W, Francesconi K, Newman J, Redon J, Devereux R, Navas-Acien A. Association of Arsenic Exposure With Cardiac Geometry and Left Ventricular Function in Young Adults. Circ Cardiovasc Imaging 2020; 12:e009018. [PMID: 31060373 DOI: 10.1161/circimaging.119.009018] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Arsenic exposure has been related to numerous adverse cardiovascular outcomes. The aim of this study was to investigate the cross-sectional and prospective association between arsenic exposure with echocardiographic measures of left ventricular (LV) geometry and functioning. METHODS A total of 1337 young adult participants free of diabetes mellitus and cardiovascular disease were recruited from the SHFS (Strong Heart Family Study). The sum of inorganic and methylated arsenic concentrations in urine (ΣAs) at baseline was used as a biomarker of arsenic exposure. LV geometry and functioning were assessed using transthoracic echocardiography at baseline and follow-up. RESULTS Mean follow-up was 5.6 years, and median (interquartile range) of ΣAs was 4.2 (2.8-6.9) µg/g creatinine. Increased arsenic exposure was associated with prevalent LV hypertrophy, with an odds ratio (95% CI) per a 2-fold increase in ΣAs of 1.47 (1.05-2.08) in all participants and of 1.58 (1.04-2.41) among prehypertensive or hypertensive individuals. Measures of LV geometry, including LV mass index, left atrial systolic diameter, interventricular septum, and LV posterior wall thickness, were positively and significantly related to arsenic exposure. Among measures of LV functioning, stroke volume, and ejection fraction were associated with arsenic exposure. CONCLUSIONS Arsenic exposure was related to an increase in LV wall thickness and LV hypertrophy in young American Indians with a low burden of cardiovascular risk factors. The relationship was stronger in participants with prehypertension or hypertension, suggesting that potential cardiotoxic effects of arsenic might be more pronounced in individuals already undergoing cardiovascular adaptive mechanisms following elevated systemic blood pressure.
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Affiliation(s)
- Gernot Pichler
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, NY (G.P., M.G.-P., A.N.-A.).,Area of Cardiometabolic and Renal Risk, Institute for Biomedical Research INCLIVA, Valencia, Spain (G.P., M.G.-P., M.T.-P., J.R.).,Division of Cardiology, Department of Internal Medicine, Hospital Hietzing, Vienna, Austria (G.P.)
| | - Maria Grau-Perez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, NY (G.P., M.G.-P., A.N.-A.).,Area of Cardiometabolic and Renal Risk, Institute for Biomedical Research INCLIVA, Valencia, Spain (G.P., M.G.-P., M.T.-P., J.R.).,Department of Statistics and Operational Research, University of Valencia, Spain (M.G.-P.)
| | - Maria Tellez-Plaza
- Area of Cardiometabolic and Renal Risk, Institute for Biomedical Research INCLIVA, Valencia, Spain (G.P., M.G.-P., M.T.-P., J.R.).,Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD (M.T.-P.).,Department of Chronic Diseases Epidemiology, National Center for Epidemiology, National Institutes for Health Carlos III, Madrid, Spain (M.T.-P.)
| | - Jason Umans
- MedStar Health Research Institute, and Georgetown University (J.U.).,Georgetown-Howard Universities Center for Clinical and Translational Science, Washington DC (J.U.)
| | - Lyle Best
- Missouri Breaks Industries Research, Inc, Timber Lake (L.B.)
| | - Shelley Cole
- Department of Genetics, Texas Biomedical Research Institute, San Antonio (S.C.)
| | - Walter Goessler
- Institute of Chemistry-Analytical Chemistry, University of Graz, Austria (W.G., K.F.)
| | - Kevin Francesconi
- Institute of Chemistry-Analytical Chemistry, University of Graz, Austria (W.G., K.F.)
| | - Jonathan Newman
- Division of Cardiology and Center for the Prevention of Cardiovascular Disease, Department of Medicine, New York University School of Medicine, NY (J.N.)
| | - Josep Redon
- Area of Cardiometabolic and Renal Risk, Institute for Biomedical Research INCLIVA, Valencia, Spain (G.P., M.G.-P., M.T.-P., J.R.).,CIBER 03/06 Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III, Madrid, Spain (J.R.)
| | | | - Ana Navas-Acien
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, NY (G.P., M.G.-P., A.N.-A.)
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Arsenic trioxide blocked proliferation and cardiomyocyte differentiation of human induced pluripotent stem cells: Implication in cardiac developmental toxicity. Toxicol Lett 2019; 309:51-58. [DOI: 10.1016/j.toxlet.2019.03.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 01/29/2019] [Accepted: 03/17/2019] [Indexed: 11/22/2022]
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Abstract
Arsenic trioxide (ATO) is among the first-line chemotherapeutic drugs used in oncological practice. It has shown substantial efficacy in treating patients with relapsed or refractory acute promyelocytic leukaemia. The clinical use of ATO is hampered due to cardiotoxicity and hence many patients are precluded from receiving this highly effective treatment. An alternative to this would be to use any drug that can ameliorate the cardiotoxic effects and allow exploiting the full therapeutic potential of ATO, with considerable impact on cancer therapy. Generation of reactive oxygen species is involved in a wide range of human diseases, including cancer, cardiovascular, pulmonary and neurological disorders. Hence, agents with the ability to protect against these reactive species may be therapeutically useful. The present review focuses on the beneficial as well as harmful effects of arsenic and ATO, the mechanisms underlying ATO toxicity and the possible ways that can be adopted to circumvent ATO-induced toxicity.
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Realgar transforming solution as a novel arsenic agent with a lower risk of cardiotoxicity. J Pharmacol Sci 2019; 140:162-170. [DOI: 10.1016/j.jphs.2019.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 06/02/2019] [Accepted: 06/04/2019] [Indexed: 12/19/2022] Open
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Bhattacharjee N, Dua TK, Khanra R, Joardar S, Nandy A, Saha A, De Feo V, Dewanjee S. Protocatechuic Acid, a Phenolic from Sansevieria roxburghiana Leaves, Suppresses Diabetic Cardiomyopathy via Stimulating Glucose Metabolism, Ameliorating Oxidative Stress, and Inhibiting Inflammation. Front Pharmacol 2017; 8:251. [PMID: 28533752 PMCID: PMC5420572 DOI: 10.3389/fphar.2017.00251] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Accepted: 04/19/2017] [Indexed: 12/20/2022] Open
Abstract
Persistent hyperglycemia, impairment of redox status and establishment of inflammatory pathophysiology integrally play important role in the pathogenesis of diabetic cardiomyopathy (DC). Present study examined the therapeutic potential of protocatechuic acid isolated from the Sansevieria roxburghiana rhizomes against DC employing rodent model of type 2 diabetes (T2D). T2D was induced by high fat diet + a low-single dose of streptozotocin (35 mg/kg, i.p.). T2D rats exhibited significantly (p < 0.01) high fasting blood glucose level. Alteration in serum lipid profile (p < 0.01) and increased levels of lactate dehydrogenase (p < 0.01) and creatine kinase (p < 0.01) in the sera of T2D rats revealed the occurrence of hyperlipidemia and diabetic pathophysiology. A significantly (p < 0.01) high levels of serum C-reactive protein and pro-inflammatory mediators revealed the establishment of inflammatory occurrence in T2D rats. Besides, significantly high levels of troponins in the sera revealed the establishment of cardiac dysfunctions in T2D rats. However, protocatechuic acid (50 and 100 mg/kg, p.o.) treatment could significantly reverse the changes in serum biochemical parameters related to cardiac dysfunctions. Molecular mechanism studies demonstrated impairment of signaling cascade, IRS1/PI3K/Akt/AMPK/p 38/GLUT4, in glucose metabolism in the skeletal muscle of T2D rats. Significant (p < 0.01) activation of polyol pathway, enhanced production of AGEs, oxidative stress and up-regulation of inflammatory signaling cascades (PKC/NF-κB/PARP) were observed in the myocardial tissue of T2D rats. However, protocatechuic acid (50 and 100 mg/kg, p.o.) treatment could significantly (p < 0.05–0.01) stimulate glucose metabolism in skeletal muscle, regulated glycemic and lipid status, reduced the secretion of pro-inflammatory cytokines, and restored the myocardial physiology in T2D rats near to normalcy. Histological assessments were also in agreement with the above findings. In silico molecular docking study again supported the interactions of protocatechuic acid with different signaling molecules, PI3K, IRS, Akt, AMPK PKC, NF-κB and PARP, involved in glucose utilization and inflammatory pathophysiology. In silico ADME study predicted that protocatechuic acid would support the drug-likeness character. Combining all, results would suggest a possibility of protocatechuic acid to be a new therapeutic agent for DC in future.
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Affiliation(s)
- Niloy Bhattacharjee
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur UniversityKolkata, India
| | - Tarun K Dua
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur UniversityKolkata, India
| | - Ritu Khanra
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur UniversityKolkata, India
| | - Swarnalata Joardar
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur UniversityKolkata, India
| | - Ashis Nandy
- Department of Chemical Technology, University of CalcuttaKolkata, India
| | - Achintya Saha
- Department of Chemical Technology, University of CalcuttaKolkata, India
| | | | - Saikat Dewanjee
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur UniversityKolkata, India
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Studies on curative efficacy of monoterpene eugenol on anti- leukemic drug arsenic trioxide induced cardiotoxicity. Biomed Pharmacother 2017; 91:559-566. [PMID: 28494415 DOI: 10.1016/j.biopha.2017.04.087] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 04/19/2017] [Accepted: 04/19/2017] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Arsenic trioxide (As2O3) is emerging as a frontline agent for the treatment of acute promyelocytic leukemia (APL) but the therapeutic application is limited by its toxicity. QT prolongation, torsades de pointes and sudden cardiac death have been implicated in the As2O3 therapy. So eugenol is a monoterpene compound is well known for its antioxidant properties and protective effect on the cardiovascular system. OBJECTIVE In this study, the cardioprotective effect of eugenol on cardiac electrical conductivity, tissue electrolytes, myocardial markers, antioxidant system, lipid peroxidation and nitric oxide production was investigated in male Wistar rats treated with arsenic trioxide. RESULTS The Inductively coupled plasma emission spectroscopic (ICP-OES) analysis pointed out the accumulation of arsenic in heart tissue. The rats administered with arsenic trioxide (4mg/kg body wt) exhibited myocardial damage that was manifested by the elevation of cardiac markers (LDH, CK-MB) enzymes and deterioration in the antioxidant enzymes (GSH, GST, GPx). Combination treatment with eugenol (5mg/kg of body wt) upholds the tissue antioxidant level, Na+/K+ - ATPase and Ca2+- ATPase activity and brings the cytosolic Ca2+, K+ and Na + levels near to normal value. Conjoined therapy with eugenol ameliorated the membrane peroxidation, restored the normal heart rate and rectified the prolongation of QT interval in the electrocardiogram. Histological examination of cardiac segments also supported the beneficial role of eugenol against arsenic-induced oxidative damages. CONCLUSION Our in vivo experimental findings suggest that monoterpenoid eugenol could be a potent and novel cytoprotective agent of clinical application against As2O3 induced cardiotoxicity.
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Varghese MV, Abhilash M, Alex M, Paul MVS, Prathapan A, Raghu KG, Nair RH. Attenuation of arsenic trioxide induced cardiotoxicity through flaxseed oil in experimental rats. Redox Rep 2017; 22:346-352. [PMID: 28209094 DOI: 10.1080/13510002.2017.1289313] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
OBJECTIVES Arsenic trioxide (As2O3) is a potent drug for acute promyelocytic leukaemia, but its clinical trials are allied with some serious adverse events mainly cardiac functional abnormalities. So the objective of our investigation is to identify the cardioprotective action of flaxseed oil (FSO), a natural compound against As2O3 induced cardiotoxicity. METHODS Male wistar rats were treated with As2O3 (4 mg/kg) to induce cardiotoxicity. FSO (250 and 500 mg/kg) was given in combination with As2O3 for evaluating its cardioprotective efficacy. RESULTS Treatment with As2O3 resulted in deposition of arsenic in heart tissue, increased cardiac marker enzymes release, lipid peroxidation (LPO), oxidative insults and pathological damages in the heart. Co-treatment with FSO (500 mg/kg) significantly reduced the arsenic accumulation, cardiac marker enzymes, LPO and cardiac structural alterations. FSO treatment significantly improved cardiac glutathione content, antioxidant enzymes and reduced the pathological damages in cardiac tissue. Gas chromatographic-mass spectrometry analysis revealed that the major fatty acid content in the FSO is alpha-linolenic acid, which has a strong milieu in cardiac health. CONCLUSION The results of the current investigation suggested that FSO is an effective agent in reducing arsenic-induced cardiac toxicity and can be used as an adjunct/dietary supplement for the cancer patients on As2O3 therapy.
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Affiliation(s)
| | - M Abhilash
- a School of Biosciences , Mahatma Gandhi University , Kottayam , India
| | - Manju Alex
- a School of Biosciences , Mahatma Gandhi University , Kottayam , India
| | - M V Sauganth Paul
- a School of Biosciences , Mahatma Gandhi University , Kottayam , India
| | - A Prathapan
- b Biochemistry and Molecular Mechanism Laboratory, Agroprocessing and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology (NIIST) , Trivandrum , India
| | - K G Raghu
- b Biochemistry and Molecular Mechanism Laboratory, Agroprocessing and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology (NIIST) , Trivandrum , India
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13
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Bhattacharjee N, Khanra R, Dua TK, Das S, De B, Zia-Ul-Haq M, De Feo V, Dewanjee S. Sansevieria roxburghiana Schult. & Schult. F. (Family: Asparagaceae) Attenuates Type 2 Diabetes and Its Associated Cardiomyopathy. PLoS One 2016; 11:e0167131. [PMID: 27893829 PMCID: PMC5125675 DOI: 10.1371/journal.pone.0167131] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 11/09/2016] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Sansevieria roxburghiana Schult. & Schult. F. (Family: Asparagaceae) rhizome has been claimed to possess antidiabetic activity in the ethno-medicinal literature in India. Therefore, present experiments were carried out to explore the protective role of edible (aqueous) extract of S. roxburghiana rhizome (SR) against experimentally induced type 2 diabetes mellitus (T2DM) and its associated cardiomyopathy in Wistar rats. METHODS SR was chemically characterized by GC-MS analysis. Antidiabetic activity of SR (50 and 100 mg/kg, orally) was measured in high fat diets (ad libitum) + low-single dose of streptozotocin (35 mg/kg, intraperitoneal) induced type 2 diabetic (T2D) rat. Fasting blood glucose level was measured at specific intermissions. Serum biochemical and inflammatory markers were estimated after sacrificing the animals. Besides, myocardial redox status, expressions of signal proteins (NF-κB and PKCs), histological and ultrastructural studies of heart were performed in the controls and SR treated T2D rats. RESULTS Phytochemical screening of the crude extract revealed the presence of phenolic compounds, sugar alcohols, sterols, amino acids, saturated fatty acids within SR. T2D rats exhibited significantly (p < 0.01) higher fasting blood glucose level with respect to control. Alteration in serum lipid profile (p < 0.01) and increased levels of lactate dehydrogenase (p < 0.01) and creatine kinase (p < 0.01) in the sera revealed the occurrence of hyperlipidemia and cell destruction in T2D rats. T2DM caused significant (p < 0.05-0.01) alteration in the biochemical markers in the sera. T2DM altered the redox status (p < 0.05-0.01), decreased (p < 0.01) the intracellular NAD and ATP concentrations in the myocardial tissues of experimental rats. While investigating the molecular mechanism, activation PKC isoforms was observed in the selected tissues. T2D rats also exhibited an up-regulation in nuclear NF-κB (p65) in the cardiac tissues. So, oral administration of SR (50 and 500 mg/kg) could reduce hyperglycemia, hyperlipidemia, membrane disintegration, oxidative stress, vascular inflammation and prevented the activation of oxidative stress induced signaling cascades leading to cell death. Histological and ultra-structural studies of cardiac tissues supported the protective characteristics of SR. CONCLUSIONS From the present findings it can be concluded that, SR could offer protection against T2DM and its associated cardio-toxicity via multiple mechanisms viz. hypoglycemic, antioxidant and anti-inflammatory actions.
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Affiliation(s)
- Niloy Bhattacharjee
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
| | - Ritu Khanra
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
| | - Tarun K. Dua
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
| | - Susmita Das
- Phytochemistry and Pharmacognosy Research Laboratory, Department of Botany, University of Calcutta, Kolkata, India
| | - Bratati De
- Phytochemistry and Pharmacognosy Research Laboratory, Department of Botany, University of Calcutta, Kolkata, India
| | - M. Zia-Ul-Haq
- Office of Research, Innovation and Commercialization, Lahore College for Women University, Lahore, Pakistan
| | - Vincenzo De Feo
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
- * E-mail: (SD); (VDF)
| | - Saikat Dewanjee
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
- * E-mail: (SD); (VDF)
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Sun TL, Liu Z, Qi ZJ, Huang YP, Gao XQ, Zhang YY. (-)-Epigallocatechin-3-gallate (EGCG) attenuates arsenic-induced cardiotoxicity in rats. Food Chem Toxicol 2016; 93:102-10. [PMID: 27170490 DOI: 10.1016/j.fct.2016.05.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 04/12/2016] [Accepted: 05/06/2016] [Indexed: 11/16/2022]
Abstract
Chronic arsenic exposure in drinking water is associated with the abnormalities of cardiac tissue. Excessive generation of ROS induced by arsenic has a central role in arsenic-induced cardiotoxicity. (-)-Epigallocatechin-3-gallate (EGCG), the most abundant polyphenol in green tea, possesses a potent antioxidant capacity and exhibits extensive pharmacological activities. This study was aim to evaluate the effect of EGCG on arsenic-induced cardiotoxicity in vivo and in vitro. Treatment with NaAsO2 seriously affected the morphology and ultrastructure of myocardium, and induced cardiac injuries, oxidative stress, intracellular calcium accumulation and apoptosis in rats. In consistent with in vivo study, the injuries, oxidative stress and apoptosis were also observed in NaAsO2-treated H9c2 cells. All of these effects induced by NaAsO2 were attenuated by EGCG. These results suggest EGCG could attenuate NaAsO2-induced cardiotoxicity, and the mechanism may involve its potent antioxidant capacity.
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Affiliation(s)
- Tao-Li Sun
- Department of Pharmacology, Xiangnan College, Chenzhou, Hunan, 423000, China
| | - Zhi Liu
- Department of Pharmacology, Guizhou Medical University, Guiyang, Guizhou, 550004, China; Department of Urology Surgery and Oncology, The Second Affiliated Hospital of Guizhou Medical University, Kaili, Guizhou, 556000, China; Department of Histology and Embryology, Guizhou Medical University, Guiyang, Guizhou, 550004, China
| | - Zheng-Jun Qi
- Department of Urology Surgery and Oncology, The Second Affiliated Hospital of Guizhou Medical University, Kaili, Guizhou, 556000, China
| | - Yong-Pan Huang
- Department of Pharmacology, Guizhou Medical University, Guiyang, Guizhou, 550004, China; Department of Pharmacology, Central South University, Changsha, Hunan, 410078, China.
| | - Xiao-Qin Gao
- Department of Histology and Embryology, Guizhou Medical University, Guiyang, Guizhou, 550004, China
| | - Yan-Yan Zhang
- Department of Pharmacology, Guizhou Medical University, Guiyang, Guizhou, 550004, China
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Omega-3 Fatty Acid Protects Against Arsenic Trioxide-Induced Cardiotoxicity In Vitro and In Vivo. Cardiovasc Toxicol 2016; 17:109-119. [DOI: 10.1007/s12012-016-9361-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Zhang JY, Sun GB, Wang M, Liao P, Du YY, Yang K, Sun XB. Arsenic trioxide triggered calcium homeostasis imbalance and induced endoplasmic reticulum stress-mediated apoptosis in adult rat ventricular myocytes. Toxicol Res (Camb) 2016; 5:682-688. [PMID: 30090381 DOI: 10.1039/c5tx00463b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 02/04/2016] [Indexed: 12/15/2022] Open
Abstract
Arsenic trioxide (ATO) is a potent anticancer drug agent but its clinical use is often limited by severe cardiotoxicity. However, its exact mechanism remains poorly understood. In this study, we simultaneously explored the direct effect of ATO on cardiac contraction in adult rat ventricular myocytes and its effects on Ca2+ transient in real time by using an IonOptix MyoCam system. The results showed that ATO increased the amplitude of sarcomere shortening, the maximal velocity of relengthening and shortening (-dL/dtmax and +dL/dtmax), time-to-90% relengthening (TR90), and time-to-peak shortening (TPS), resulting in abnormal cardiomyocyte contraction. Meanwhile, ATO markedly increased the resting Ca2+ ratio, amplitude/resting calcium, the maximal velocity of Ca2+ shortening and relaxation (+d[Ca2+]/dtmax and -d[Ca2+]/dtmax), time-to-50% peak [Ca2+] i and the decay rate of [Ca2+] i transients, suggesting that ATO leads to intracellular imbalance of calcium homeostasis. ATO also inhibited sarcoplasmic reticulum Ca2+-ATPase 2a (SERCA2a) activity in a time-dependent manner and activated the endoplasmic reticulum (ER) stress reaction. These results revealed that ATO dramatically aggravates Ca2+ overload and promotes ER stress, eventually causing abnormal cardiomyocyte contraction in a dose-dependent and time-dependent manner.
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Affiliation(s)
- Jing-Yi Zhang
- Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences , Peking Union Medical College , Beijing 100193 , China . ;
| | - Gui-Bo Sun
- Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences , Peking Union Medical College , Beijing 100193 , China . ;
| | - Min Wang
- Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences , Peking Union Medical College , Beijing 100193 , China . ;
| | - Ping Liao
- College of Pharmacy , Guilin Medical University , Guilin 541000 , China
| | - Yu-Yang Du
- Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences , Peking Union Medical College , Beijing 100193 , China . ;
| | - Ke Yang
- Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences , Peking Union Medical College , Beijing 100193 , China . ;
| | - Xiao-Bo Sun
- Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences , Peking Union Medical College , Beijing 100193 , China . ;
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Alamolhodaei NS, Shirani K, Karimi G. Arsenic cardiotoxicity: An overview. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2015; 40:1005-14. [PMID: 26606645 DOI: 10.1016/j.etap.2015.08.030] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 08/25/2015] [Accepted: 08/30/2015] [Indexed: 05/20/2023]
Abstract
Arsenic, a naturally ubiquitous element, is found in foods and environment. Cardiac dysfunction is one of the major causes of morbidity and mortality in the world. Arsenic exposure is associated with various cardiopathologic effects including ischemia, arrhythmia and heart failure. Possible mechanisms of arsenic cardiotoxicity include oxidative stress, DNA fragmentation, apoptosis and functional changes of ion channels. Several evidences have shown that mitochondrial disruption, caspase activation, MAPK signaling and p53 are the pathways for arsenic induced apoptosis. Arsenic trioxide is an effective and potent antitumor agent used in patients with acute promyelocytic leukemia and produces dramatic remissions. As2O3 administration has major limitations such as T wave changes, QT prolongation and sudden death in humans. In this review, we discuss the underlying pathobiology of arsenic cardiotoxicity and provide information about cardiac health effects associated with some medicinal plants in arsenic toxicity.
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Affiliation(s)
| | - Kobra Shirani
- Department of Pharmacodynamy and Toxicology, Faculty of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Gholamreza Karimi
- Pharmaceutical Research Center and Pharmacy School, Mashhad University of Medical Sciences, Iran.
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Liu SH, Yang RS, Yen YP, Chiu CY, Tsai KS, Lan KC. Low-Concentration Arsenic Trioxide Inhibits Skeletal Myoblast Cell Proliferation via a Reactive Oxygen Species-Independent Pathway. PLoS One 2015; 10:e0137907. [PMID: 26359868 PMCID: PMC4567280 DOI: 10.1371/journal.pone.0137907] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 08/22/2015] [Indexed: 12/25/2022] Open
Abstract
Myoblast proliferation and differentiation are essential for skeletal muscle regeneration. Myoblast proliferation is a critical step in the growth and maintenance of skeletal muscle. The precise action of inorganic arsenic on myoblast growth has not been investigated. Here, we investigated the in vitro effect of inorganic arsenic trioxide (As2O3) on the growth of C2C12 myoblasts. As2O3 decreased myoblast growth at submicromolar concentrations (0.25–1 μM) after 72 h of treatment. Submicromolar concentrations of As2O3 did not induce the myoblast apoptosis. Low-concentration As2O3 (0.5 and 1 μM) significantly suppressed the myoblast cell proliferative activity, which was accompanied by a small proportion of bromodeoxyuridine (BrdU) incorporation and decreased proliferating cell nuclear antigen (PCNA) protein expression. As2O3 (0.5 and 1 μM) increased the intracellular arsenic content but did not affect the reactive oxygen species (ROS) levels in the myoblasts. Cell cycle analysis indicated that low-concentrations of As2O3 inhibited cell proliferation via cell cycle arrest in the G1 and G2/M phases. As2O3 also decreased the protein expressions of cyclin D1, cyclin E, cyclin B1, cyclin-dependent kinase (CDK) 2, and CDK4, but did not affect the protein expressions of p21 and p27. Furthermore, As2O3 inhibited the phosphorylation of Akt. Insulin-like growth factor-1 significantly reversed the inhibitory effect of As2O3 on Akt phosphorylation and cell proliferation in the myoblasts. These results suggest that submicromolar concentrations of As2O3 alter cell cycle progression and reduce myoblast proliferation, at least in part, through a ROS-independent Akt inhibition pathway.
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Affiliation(s)
- Shing Hwa Liu
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Rong-Sen Yang
- Departments of Orthopaedic, College of Medicine and Hospital, National Taiwan University, Taipei, Taiwan
| | - Yuan-Peng Yen
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chen-Yuan Chiu
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Keh-Sung Tsai
- Departments of Laboratory Medicine, College of Medicine and Hospital, National Taiwan University, Taipei, Taiwan
| | - Kuo-Cheng Lan
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
- * E-mail:
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Vineetha VP, Soumya RS, Raghu KG. Phloretin ameliorates arsenic trioxide induced mitochondrial dysfunction in H9c2 cardiomyoblasts mediated via alterations in membrane permeability and ETC complexes. Eur J Pharmacol 2015; 754:162-72. [PMID: 25746422 DOI: 10.1016/j.ejphar.2015.02.036] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 02/23/2015] [Accepted: 02/23/2015] [Indexed: 02/07/2023]
Abstract
Arsenic trioxide (ATO), though a very effective drug for the treatment of acute promyelocytic leukemia, leads to cardiotoxicity. As mitochondria are the center of attention of cardiac cell׳s general metabolic status, it is primarily important to see the interaction of ATO with mitochondria. Studies related exclusively to the alterations in mitochondria and its associated functions caused by ATO are very limited. The present investigation aims to explore the effect of ATO on various components of electron transport chain, oxygen consumption, ATP production, mitochondrial superoxide generation, transmembrane potential, permeability pore opening, calcium homeostasis and apoptosis. Attempts were also made to see the efficacy of phloretin, a potent antioxidant flavonoid found majorly in apple peel on cardiotoxicity. The H9c2 cells exposed to ATO (5µM) exhibited increased oxidative stress with reduced innate antioxidant status, mitochondrial dysfunctions and apoptosis. It increased the intracellular calcium content, caused alterations in the activity of transcription factor Nrf2, xanthine oxidase, aconitase and caspase 3 compared to the control group. Phloretin at 2.5 and 5µM concentrations were able to protect the cells from ATO toxicity via protecting mitochondria through its antioxidant potential. The present investigation based on mitochondria reveals the probability of cardioprotective potential of phloretin for the cancer patients on ATO chemotherapy.
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Affiliation(s)
- Vadavanath Prabhakaran Vineetha
- Agroprocessing and Natural Products Division, Council for Scientific and Industrial Research - National Institute for Interdisciplinary Science and Technology (CSIR - NIIST), Thiruvananthapuram, Kerala 695019, India
| | - Rema Sreenivasan Soumya
- Agroprocessing and Natural Products Division, Council for Scientific and Industrial Research - National Institute for Interdisciplinary Science and Technology (CSIR - NIIST), Thiruvananthapuram, Kerala 695019, India
| | - Kozhiparambil Gopalan Raghu
- Agroprocessing and Natural Products Division, Council for Scientific and Industrial Research - National Institute for Interdisciplinary Science and Technology (CSIR - NIIST), Thiruvananthapuram, Kerala 695019, India.
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Wang C, Chen X, Zou H, Chen X, Liu Y, Zhao S. The roles of mitoferrin-2 in the process of arsenic trioxide-induced cell damage in human gliomas. Eur J Med Res 2014; 19:49. [PMID: 25256833 PMCID: PMC4200193 DOI: 10.1186/s40001-014-0049-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 08/27/2014] [Indexed: 12/29/2022] Open
Abstract
Background Among glioma treatment strategies, arsenic trioxide (As2O3) has shown efficacy as a therapeutic agent against human gliomas. However, the exact antitumor mechanism of action of As2O3 is still unclear. Mitochondria are considered to be the major source of intracellular reactive oxygen species (ROS), which are known to be associated with As2O3-induced cell damage. Therefore, we investigated whether mitoferrin-2, a mitochondrial iron uptake transporter, participates in As2O3-induced cell killing in human gliomas. Methods Human glioma cell lines were used to explore the mechanism of As2O3’s antitumor effects. First, expression of mitoferrin-2 was analyzed in glioma cells that were pretreated with As2O3. Changes in ROS production and apoptosis were assessed. Furthermore, cell viability was assessed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT). Results In the present study we found that As2O3 induced ROS production and apoptosis in glioma cells. In addition, gene expression of mitoferrin-2, a mitochondrial iron uptake transporter, was increased 4 to 5 fold after exposure to As2O3 (5 μM) for 48 hours. Furthermore, apoptosis and cytotoxicity induced by As2O3 in glioma cells were decreased after silencing the mitoferrin-2 gene. Conclusions Our findings indicated that mitoferrin-2 participates in mitochondrial ROS-dependent mechanisms underlying As2O3-mediated damage in glioma cells.
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The novel regulations of MEF2A, CAMKK2, CALM3, and TNNI3 in ventricular hypertrophy induced by arsenic exposure in rats. Toxicology 2014; 324:123-35. [PMID: 25089838 DOI: 10.1016/j.tox.2014.07.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 07/24/2014] [Accepted: 07/26/2014] [Indexed: 11/21/2022]
Abstract
Arsenic is a ubiquitous toxic compound that exists naturally in many sources such as soil, groundwater, and food; in which vast majority forms are arsenite (As(3+)) or arsenate (As(5+)). The mechanism of arsenic detoxification in humans still remains obscured. Epidemiologic studies documented that arsenic pollution caused black foot disease, cardiovascular diseases (hypertension, hypotension, cardiomyopathy), bladder cancer and skin cancer in many countries in which Taiwan is considered as high arsenic exposure country for long time ago. However, the effects of arsenic to cardiac functions still lacked of investigation while some studies mainly focus on inflammatory and cancer mechanisms. In the present study, we found cardiac hypertrophy signaling may be the most significant pathway for up regulated genes in arsenic exposed patients via bioinformatics approach. To verify our bioinformatics prediction, arsenic was fed orally to rats at different concentration based on previous studies in Taiwan. Using hemodynamic method as the main tool to measure the changes in blood pressure, left ventricular pressure and left ventricular contractility index, the findings suggest that highly exposure to arsenic lead to hypertension; elevated left ventricular diastolic pressure and alteration in cardiac contractility which are supposed to be the interaction between arsenic and cardiac nerves activity via the changing in calcium homeostasis. Collectively, based on our real-time PCR and western blot data strongly suggest that calcium homeostasis may also go through MEF2A, TNNI3, CAMKK2, CALM3 and cardiac hypertrophy relative signaling pathway.
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Prathapan A, Vineetha VP, Raghu KG. Protective effect of Boerhaavia diffusa L. against mitochondrial dysfunction in angiotensin II induced hypertrophy in H9c2 cardiomyoblast cells. PLoS One 2014; 9:e96220. [PMID: 24788441 PMCID: PMC4005769 DOI: 10.1371/journal.pone.0096220] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 04/03/2014] [Indexed: 11/25/2022] Open
Abstract
Mitochondrial dysfunction plays a critical role in the development of cardiac hypertrophy and heart failure. So mitochondria are emerging as one of the important druggable targets in the management of cardiac hypertrophy and other associated complications. In the present study, effects of ethanolic extract of Boerhaavia diffusa (BDE), a green leafy vegetable against mitochondrial dysfunction in angiotensin II (Ang II) induced hypertrophy in H9c2 cardiomyoblasts was evaluated. H9c2 cells challenged with Ang II exhibited pathological hypertrophic responses and mitochondrial dysfunction which was evident from increment in cell volume (49.09±1.13%), protein content (55.17±1.19%), LDH leakage (58.74±1.87%), increased intracellular ROS production (26.25±0.91%), mitochondrial superoxide generation (65.06±2.27%), alteration in mitochondrial transmembrane potential (ΔΨm), opening of mitochondrial permeability transition pore (mPTP) and mitochondrial swelling. In addition, activities of mitochondrial respiratory chain complexes (I-IV), aconitase, NADPH oxidase, thioredoxin reductase, oxygen consumption rate and calcium homeostasis were evaluated. Treatment with BDE significantly prevented the generation of intracellular ROS and mitochondrial superoxide radicals and protected the mitochondria by preventing dissipation of ΔΨm, opening of mPTP, mitochondrial swelling and enhanced the activities of respiratory chain complexes and oxygen consumption rate in H9c2 cells. Activities of aconitase and thioredoxin reductase which was lowered (33.77±0.68% & 45.81±0.71% respectively) due to hypertrophy, were increased in BDE treated cells (P≤0.05). Moreover, BDE also reduced the intracellular calcium overload in Ang II treated cells. Overall results revealed the protective effects of B. diffusa against mitochondrial dysfunction in hypertrophy in H9c2 cells and the present findings may shed new light on the therapeutic potential of B. diffusa in addition to its nutraceutical potentials.
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Affiliation(s)
- Ayyappan Prathapan
- Agroprocessing and Natural Products Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
| | - Vadavanath Prabhakaran Vineetha
- Agroprocessing and Natural Products Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
| | - Kozhiparambil Gopalan Raghu
- Agroprocessing and Natural Products Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
- * E-mail:
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Vineetha VP, Girija S, Soumya RS, Raghu KG. Polyphenol-rich apple (Malus domestica L.) peel extract attenuates arsenic trioxide induced cardiotoxicity in H9c2 cells via its antioxidant activity. Food Funct 2014; 5:502-11. [DOI: 10.1039/c3fo60470e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Das J, Roy A, Sil PC. Mechanism of the protective action of taurine in toxin and drug induced organ pathophysiology and diabetic complications: a review. Food Funct 2013; 3:1251-64. [PMID: 22930035 DOI: 10.1039/c2fo30117b] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Taurine (2-aminoethanesulfonic acid), a conditionally essential amino acid, is found in large concentrations in all mammalian tissues and is particularly abundant in aquatic foods. Taurine exhibits membrane stabilizing, osmoregulatory and cytoprotective effects, antioxidative properties, regulates intracellular Ca(2+) concentration, modulates ion movement and neurotransmitters, reduce the levels of pro-inflammatory cytokines in various organs and controls blood pressure. Recently, emerging evidence from the literature shows the effectiveness of taurine as a protective agent against several environmental toxins and drug-induced multiple organ injuries as the outcome of hepatotoxicity, nephrotoxicity, neurotoxicity, testicular toxicity and cardiotoxicity in several animal models. Besides, taurine is also effective in combating diabetes and its associated complications, including cardiomyopathy, nephropathy, neuropathy, retinopathy and atherosclerosis. These beneficial effects appear to be due to the multiple actions of taurine on cellular functions. This review summarizes the mechanism of the prophylactic role of taurine against several environmental toxins and drug-induced organ pathophysiology and diabetes.
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Affiliation(s)
- Joydeep Das
- Division of Molecular Medicine, Bose Institute, P-1/12, CIT Scheme VII M, Kolkata-700054, India
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Boerhaavia diffusa L. attenuates angiotensin II-induced hypertrophy in H9c2 cardiac myoblast cells via modulating oxidative stress and down-regulating NF-κβ and transforming growth factor β1. Br J Nutr 2013; 110:1201-10. [PMID: 23591029 DOI: 10.1017/s0007114513000561] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The present study evaluated the antihypertrophic potential of the ethanolic extract of Boerhaavia diffusa (BDE), a well-known edible cardiotonic plant reported in Ayurveda against angiotensin II-induced hypertrophy in H9c2 cardiac myoblast cells. Markers of hypertrophy such as cell size, protein content and the concentrations of atrial natriuretic peptide (ANP) and B-type natriuretic peptide (BNP) were analysed for the confirmation of hypertrophy induction. Angiotensin II (100 nM) caused an increase in cell volume (69·26 (SD 1·21)%),protein content (48·48 (SD 1·64)%), ANP (81·90 (SD 1·22)%) and BNP (108·57 (SD 1·47)%). BDE treatment significantly reduced cell volume, protein content and the concentrations of ANP and BNP (P#0·05) in H9c2 cells. The activity of various antioxidant enzymes and the concentration of reduced glutathione, which was lowered due to hypertrophy, were increased in BDE-treated cells. The BDE treatment also reduced intracellular reactive oxygen species generation, lipid peroxidation and protein carbonyls in cells. In addition,the expression patterns of NF-kb and transforming growth factor b1 were found to be increased during hypertrophy, and their expressions were reduced on BDE treatment. In vitro chemical assays showed that BDE inhibits angiotensin-converting enzyme and xanthine oxidase in a dose-dependent manner with an estimated 50% effective concentration (EC50) value of 166·12 (SD 2·42) and 60·05 (SD 1·54) mg/ml,respectively. The overall results clearly indicate the therapeutic potential of B. diffusa against cardiac hypertrophy, in addition to its nutritional qualities.
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Li C, Qu X, Xu W, Qu N, Mei L, Liu Y, Wang X, Yu X, Liu Z, Nie D, Liu Y, Yan J, Yang B, Lu Y, Chu W. Arsenic trioxide induces cardiac fibroblast apoptosis in vitro and in vivo by up-regulating TGF-β1 expression. Toxicol Lett 2013; 219:223-30. [PMID: 23542815 DOI: 10.1016/j.toxlet.2013.03.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 03/15/2013] [Accepted: 03/20/2013] [Indexed: 02/03/2023]
Abstract
Arsenic trioxide (As2O3; ATO) is clinically effective in treating acute promyelocytic leukemia (APL); however, it frequently causes cardiotoxic effects. This study was designed to investigate whether ATO could induce apoptosis of cardiac fibroblasts (CFs) that play very important roles in maintaining the structure integrity and function of the heart. Cardiac fibroblasts from guinea pigs administered with ATO (1mg/kgbw) were used to test the pro-apoptotic role of ATO in vivo. The current study demonstrated that ATO induced morphological characteristics of apoptosis and Caspase-3 activation in CFs of guinea pigs along with a significant up-regulation in TGF-β1 protein expression, Bax/Bcl-2 ratio and ERK1/2 phosphorylation. In vitro MTT assay showed that ATO remarkably reduced the viability of cultured cardiac fibroblasts (NRCFs) from neonatal rat in a concentration- and time-dependent manner. Consistent with the notions in vivo, ATO significantly induced the apoptosis in NRCFs, dramatically up-regulated TGF-β1 protein level and Bax/Bcl-2 ratio in a time-dependent fashion and activated Caspase-3 and ERK1/2. Finally, pretreatment with LY364947, an inhibitor of TGF-β signaling could apparently reverse these changes. We therefore conclude that TGF-β is functionally linked to ERK1/2 and that TGF-β signaling is responsible for ATO-induced CFs apoptosis, which provides a novel mechanism of ATO related cardiac toxicology.
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Affiliation(s)
- Cui Li
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), Harbin Medical University, Harbin, Heilongjiang 150081, China
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Rana T, Bera AK, Bhattacharya D, Das S, Pan D, Das SK. Characterization of arsenic-induced cytotoxicity in liver with stress in erythrocytes and its reversibility with Pleurotus florida lectin. Toxicol Ind Health 2013; 31:108-22. [PMID: 23282998 DOI: 10.1177/0748233712468026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Arsenic is one of the most hazardous substances in the environment known to cause toxicity in multiple organs. Cell adhesion, morphological alterations, cell proliferation, terminal deoxyuridine triphosphate nick-end labeling (TUNEL) and caspase-3/CPP32 fluorometric protease assay were important biomarkers to assess apoptosis in cells. This study aimed to evaluate arsenic-induced apoptosis in the hepatocytes of rat and its protective efficacy with coadministration of ascorbic acid (AA) and Pleurotus florida lectin (PFL) individually. Results of the present study also showed that arsenic caused cytotoxicity by elevating morphological alterations, TUNEL-positive nuclei, caspase-3 activity and DNA damage and reducing cell adhesion and cell proliferation in a time-dependent manner. The apoptosis in hepatocytes was reverted to normal value after coadministration of mushroom lectin in arsenic-exposed rat. The study provided significant evidence that PFL has antiapoptotic property against arsenic-induced toxicity. The beneficial effect of PFL was proportional to its duration of exposure. Retard activities of superoxide dismutase and catalase, enhanced lipid peroxidation as well as protein carbonyl in erythrocytes caused by arsenic could also be maintained toward normalcy by supplementation of AA and PFL. These antioxidative effects were exhibited in a time-dependant manner. In rat, treatment with AA and PFL prevented alteration of plasma enzyme activities caused by arsenic. The results concluded that treatment with PFL has significant role in protecting animals from arsenic-induced erythrocytic damage. This finding might be of therapeutic benefit in people suffering from chronic exposure to arsenic from natural sources, a global problem especially relevant to millions of people on the Indian subcontinent.
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Affiliation(s)
- Tanmoy Rana
- Indian Veterinary Research Institute, Eastern Regional Station, Kolkata-37, West Bengal, India
| | - Asit Kumar Bera
- Indian Veterinary Research Institute, Eastern Regional Station, Kolkata-37, West Bengal, India National Research Centre on Yak, Dirang, West Kameng District, Arunachal Pradesh- 790101, India
| | - Debasis Bhattacharya
- Indian Veterinary Research Institute, Eastern Regional Station, Kolkata-37, West Bengal, India National Research Centre on Yak, Dirang, West Kameng District, Arunachal Pradesh- 790101, India
| | - Subhashree Das
- Indian Veterinary Research Institute, Eastern Regional Station, Kolkata-37, West Bengal, India
| | - Diganta Pan
- Indian Veterinary Research Institute, Eastern Regional Station, Kolkata-37, West Bengal, India
| | - Subrata Kumar Das
- Indian Veterinary Research Institute, Eastern Regional Station, Kolkata-37, West Bengal, India
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Isokpehi RD, Udensi UK, Anyanwu MN, Mbah AN, Johnson MO, Edusei K, Bauer MA, Hall RA, Awofolu OR. Knowledge building insights on biomarkers of arsenic toxicity to keratinocytes and melanocytes. Biomark Insights 2012; 7:127-41. [PMID: 23115478 PMCID: PMC3480875 DOI: 10.4137/bmi.s7799] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Exposure to inorganic arsenic induces skin cancer and abnormal pigmentation in susceptible humans. High-throughput gene transcription assays such as DNA microarrays allow for the identification of biological pathways affected by arsenic that lead to initiation and progression of skin cancer and abnormal pigmentation. The overall purpose of the reported research was to determine knowledge building insights on biomarker genes for arsenic toxicity to human epidermal cells by integrating a collection of gene lists annotated with biological information. The information sets included toxicogenomics gene-chemical interaction; enzymes encoded in the human genome; enriched biological information associated with genes; environmentally relevant gene sequence variation; and effects of non-synonymous single nucleotide polymorphisms (SNPs) on protein function. Molecular network construction for arsenic upregulated genes TNFSF18 (tumor necrosis factor [ligand] superfamily member 18) and IL1R2 (interleukin 1 Receptor, type 2) revealed subnetwork interconnections to E2F4, an oncogenic transcription factor, predominantly expressed at the onset of keratinocyte differentiation. Visual analytics integration of gene information sources helped identify RAC1, a GTP binding protein, and TFRC, an iron uptake protein as prioritized arsenic-perturbed protein targets for biological processes leading to skin hyperpigmentation. RAC1 regulates the formation of dendrites that transfer melanin from melanocytes to neighboring keratinocytes. Increased melanocyte dendricity is correlated with hyperpigmentation. TFRC is a key determinant of the amount and location of iron in the epidermis. Aberrant TFRC expression could impair cutaneous iron metabolism leading to abnormal pigmentation seen in some humans exposed to arsenicals. The reported findings contribute to insights on how arsenic could impair the function of genes and biological pathways in epidermal cells. Finally, we developed visual analytics resources to facilitate further exploration of the information and knowledge building insights on arsenic toxicity to human epidermal keratinocytes and melanocytes.
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Affiliation(s)
- Raphael D Isokpehi
- RCMI Center for Environmental Health, College of Science, Engineering and Technology, Jackson State University, Jackson, MS, USA. ; Center for Bioinformatics & Computational Biology, Department of Biology, Jackson State University, Jackson, MS, USA
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Prathapan A, Krishna MS, Nisha V, Sundaresan A, Raghu K. Polyphenol rich fruit pulp of Aegle marmelos (L.) Correa exhibits nutraceutical properties to down regulate diabetic complications — An in vitro study. Food Res Int 2012. [DOI: 10.1016/j.foodres.2012.06.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Arsenic induces apoptosis in myoblasts through a reactive oxygen species-induced endoplasmic reticulum stress and mitochondrial dysfunction pathway. Arch Toxicol 2012; 86:923-33. [PMID: 22622864 DOI: 10.1007/s00204-012-0864-9] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Accepted: 04/26/2012] [Indexed: 01/26/2023]
Abstract
A pool of myoblasts available for myogenesis is important for skeletal muscle size. The decreased number of skeletal muscle fibers could be due to the decreased myoblast proliferation or cytotoxicity. Identification of toxicants that regulate myoblast apoptosis is important in skeletal muscle development or regeneration. Here, we investigate the cytotoxic effect and its possible mechanisms of arsenic trioxide (As(2)O(3)) on myoblasts. C2C12 myoblasts underwent apoptosis in response to As(2)O(3) (1-10 μM), accompanied by increased Bax/Bcl-2 ratio, decreased mitochondria membrane potential, increased cytochrome c release, increased caspase-3/-9 activity, and increased poly (ADP-ribose) polymerase (PARP) cleavage. Moreover, As(2)O(3) triggered the endoplasmic reticulum (ER) stress indentified through several key molecules of the unfolded protein response, including glucose-regulated protein (GRP)-78, GRP-94, PERK, eIF2α, ATF6, and caspase-12. Pretreatment with antioxidant N-acetylcysteine (NAC, 0.5 mM) dramatically suppressed the increases in reactive oxygen species (ROS), lipid peroxidation, ER stress, caspase cascade activity, and apoptosis in As(2)O(3) (10 μM)-treated myoblasts. Furthermore, As(2)O(3) (10 μM) effectively decreased the phosphorylation of Akt, which could be reversed by NAC. Over-expression of constitutive activation of Akt (c.a. Akt) also significantly attenuated As(2)O(3)-induced myoblast apoptosis. Taken together, these results suggest that As(2)O(3) may exert its cytotoxicity on myoblasts by inducing apoptosis through a ROS-induced mitochondrial dysfunction, ER stress, and Akt inactivation signaling pathway.
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Flora SJS, Pachauri V, Mittal M, Kumar D. Interactive effect of arsenic and fluoride on cardio-respiratory disorders in male rats: possible role of reactive oxygen species. Biometals 2011; 24:615-28. [PMID: 21243404 DOI: 10.1007/s10534-011-9412-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 01/10/2011] [Indexed: 10/18/2022]
Abstract
Epidemiological evidence demonstrates positive correlation between environmental and occupational arsenic or fluoride exposure and risk to various cardio-respiratory disorders. Arsenic-exposure has been associated with atherosclerosis, hypertension, cerebrovascular diseases, ischemic heart disease, and peripheral vascular disorders, whereas Fluoride-exposure manifests cardiac irregularities and low blood pressure (BP). Present study aims to study the combined effects of these toxicants on various cardio-respiratory variables in male rats. Single intravenous (i.v.) dose of arsenic (1, 5, 10 mg/kg) or fluoride (5, 10, 20, 36.5 mg/kg) either alone or in combination were administered. Individual exposure to arsenic or fluoride led to a significant depletion of mean arterial pressure, heart rate (HR), respiration rate and neuromuscular (NM) transmission in a dose-dependent manner. These changes were accompanied by increased levels of blood reactive oxygen species (ROS) and decreased glutathione (GSH) concentrations. An increase in the blood acetyl cholinesterase (AChE) activity was observed in both arsenic or fluoride exposed rats. These changes were significantly more pronounced in arsenic-exposed animals than in fluoride. During combined exposure to arsenic (5 mg/kg) + fluoride (20 mg/kg) or arsenic (10 mg/kg) + fluoride (36.5 mg/kg) the toxic effects were more pronounced compared to individual toxicities of arsenic or fluoride alone. However, combined exposure to arsenic (5 mg/kg) + fluoride (36.5 mg/kg) resulted in antagonistic effects on variables suggestive of altered cardio-respiratory function and oxidative stress. The results from the present study suggest that arsenic or fluoride individually demonstrate cardio-respiratory failure at all doses whereas during combination exposure these toxins show variable toxicities; both synergistic and antagonistic effects depending upon the dose. Moreover, it may be concluded that arsenic and/or fluoride cardio-respiratory toxicity may be mediated via oxidative stress. However, these results are new in the discipline thus requires further exploration.
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Affiliation(s)
- S J S Flora
- Division of Pharmacology and Toxicology, Defence Research and Development Establishment, Jhansi Road, Gwalior 474 002, India.
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Nampoothiri SV, Prathapan A, Cherian OL, Raghu KG, Venugopalan VV, Sundaresan A. In vitro antioxidant and inhibitory potential of Terminalia bellerica and Emblica officinalis fruits against LDL oxidation and key enzymes linked to type 2 diabetes. Food Chem Toxicol 2010; 49:125-31. [PMID: 20951180 DOI: 10.1016/j.fct.2010.10.006] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Revised: 09/14/2010] [Accepted: 10/02/2010] [Indexed: 12/18/2022]
Abstract
The present study evaluated the free radical scavenging capacity and antioxidant potential of different solvent extracts (Hexane (HE), ethyl acetate (EA), methanol (ME), 70% methanol (MW) and Water (WA)) of Terminalia bellerica (TB) and Emblica officinalis (EB) fruits. Methanol extract (ME) of TB and EB fruits exhibited maximum scavenging activity against DPPH, superoxide, hydroxyl and nitric oxide radicals. Cell based antioxidant activity was assayed by flow cytometry using DCFH-DA as probe. Methanol extracts were also screened for their antidiabetic activity via inhibition of α-amylase, α-glucosidase and antiglycation assays. Results showed that ME of TB and EB can act as potent α-amylase and α-glucosidase inhibitor. Significant antiglycation activity also confirms the therapeutic potential of these extracts against diabetes. Both the extracts significantly inhibited the oxidation of LDL under in vitro conditions. Liquid chromatography-mass spectroscopy (LC-MS) analysis revealed that methanol extract of TB and EB contains ellagic acid and ascorbic acid as the major compound respectively.
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Affiliation(s)
- Suresh V Nampoothiri
- Agroprocessing and Natural Products Division, National Institute for Interdisciplinary Science and Technology (NIIST), CSIR, Thiruvananthapuram, Kerala, India
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Yen YP, Tsai KS, Chen YW, Huang CF, Yang RS, Liu SH. Arsenic inhibits myogenic differentiation and muscle regeneration. ENVIRONMENTAL HEALTH PERSPECTIVES 2010; 118:949-56. [PMID: 20299303 PMCID: PMC2920914 DOI: 10.1289/ehp.0901525] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Accepted: 03/18/2010] [Indexed: 05/08/2023]
Abstract
BACKGROUND The incidence of low birth weights is increased in offspring of women who are exposed to high concentrations of arsenic in drinking water compared with other women. We hypothesized that effects of arsenic on birth weight may be related to effects on myogenic differentiation. OBJECTIVE We investigated the effects of arsenic trioxide (As2O3) on the myogenic differentiation of myoblasts in vitro and muscle regeneration in vivo. METHODS C2C12 myoblasts and primary mouse and human myoblasts were cultured in differentiation media with or without As2O3 (0.1-0.5 microM) for 4 days. Myogenic differentiation was assessed by myogenin and myosin heavy chain expression and multinucleated myotube formation in vitro; skeletal muscle regeneration was tested using an in vivo mouse model with experimental glycerol myopathy. RESULTS A submicromolar concentration of As2O3 dose-dependently inhibited myogenic differentiation without apparent effects on cell viability. As2O3 significantly and dose-dependently decreased phosphorylation of Akt and p70s6k proteins during myogenic differentiation. As2O3-induced inhibition in myotube formation and muscle-specific protein expression was reversed by transfection with the constitutively active form of Akt. Sections of soleus muscles stained with hematoxylin and eosin showed typical changes of injury and regeneration after local glycerol injection in mice. Regeneration of glycerol-injured soleus muscles, myogenin expression, and Akt phosphorylation were suppressed in muscles isolated from As2O3-treated mice compared with untreated mice. CONCLUSION Our results suggest that As2O3 inhibits myogenic differentiation by inhibiting Akt-regulated signaling.
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Affiliation(s)
| | - Keh-Sung Tsai
- Department of Laboratory Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Ya-Wen Chen
- Department of Physiology and
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan
| | - Chun-Fa Huang
- Graduate Institute of Chinese Medical Science, School of Chinese Medicine, China Medical University, Taichung, Taiwan
| | | | - Shing-Hwa Liu
- Institute of Toxicology and
- Department of Urology, College of Medicine and Hospital, National Taiwan University, Taipei, Taiwan
- Address correspondence to S.H. Liu, Institute of Toxicology, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-Ai Rd., Taipei, 10051, Taiwan. Telephone: 886-2-23123456, ext. 88605. Fax: 886-2-23410217. E-mail:
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