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Volumn 28, Issue 4, 2013, Pages

Role of the renin-angiotensin-aldosterone system and the glutathione S-transferase Mu, Pi and Theta gene polymorphisms in cardiotoxicity after anthracycline chemotherapy for breast carcinoma

Author keywords

Anthracycline cardiotoxicity; Breast cancer; Gene polymorphism; Renin angiotensin aldosterone system (RAAS)

Indexed keywords

ADRENALIN; ALDOSTERONE; ALDOSTERONE SYNTHASE; ANGIOTENSIN 1 RECEPTOR; ANGIOTENSINOGEN; ANTHRACYCLINE; BRAIN NATRIURETIC PEPTIDE; CYCLOPHOSPHAMIDE; DIPEPTIDYL CARBOXYPEPTIDASE; EPIRUBICIN; FLUOROURACIL; GLUTATHIONE TRANSFERASE; GLUTATHIONE TRANSFERASE MU; GLUTATHIONE TRANSFERASE P1; GLUTATHIONE TRANSFERASE THETA; HEMOGLOBIN; NORADRENALIN; TROPONIN I; UNCLASSIFIED DRUG;

EID: 84890655949     PISSN: 03936155     EISSN: 17246008     Source Type: Journal    
DOI: 10.5301/jbm.5000041     Document Type: Article
Times cited : (35)

References (46)
  • 1
    • 19344364880 scopus 로고    scopus 로고
    • Effects of chemotherapy and hormonal therapy for early breast cancer on recurrence and 15-year survival: An overview of the randomised trials
    • Early Breast Cancer Trialists' Collaborative Group (EBCTCG)
    • Early Breast Cancer Trialists' Collaborative Group (EBCTCG). Effects of chemotherapy and hormonal therapy for early breast cancer on recurrence and 15-year survival: an overview of the randomised trials. Lancet 2005; 365: 1687-717.
    • (2005) Lancet , vol.365 , pp. 1687-1717
  • 2
    • 79953236043 scopus 로고
    • Doxorubicin-induced cardiomyopathy
    • Singal PK, Iliskovic N. Doxorubicin-induced cardiomyopathy. N Engl J Med 1995; 332: 1738-43.
    • (1995) N Engl J Med , vol.332 , pp. 1738-1743
    • Singal, P.K.1    Iliskovic, N.2
  • 3
    • 0018716636 scopus 로고
    • Risk factors for doxorubicin-induced congestive heart failure
    • Von Hoff D, Layard M, Basa P, et al. Risk factors for doxorubicin-induced congestive heart failure. Ann Inter Med 1979; 91: 710-7.
    • (1979) Ann Inter Med , vol.91 , pp. 710-717
    • Von Hoff, D.1    Layard, M.2    Basa, P.3
  • 4
    • 0001922230 scopus 로고
    • Anthracycline-induced cardiotoxicity and its relevance in cancer treatment
    • In: Nimmo WS, Tucker GT (eds), Boca Raton, FL; CRC Press
    • Praga C, Trave F, Petroccione A. Anthracycline-induced cardiotoxicity and its relevance in cancer treatment. In: Nimmo WS, Tucker GT (eds). Clinical Measurement in Drug Evaluation. Boca Raton, FL; CRC Press 1991; 131-42.
    • (1991) Clinical Measurement in Drug Evaluation , pp. 131-142
    • Praga, C.1    Trave, F.2    Petroccione, A.3
  • 5
    • 69349093006 scopus 로고    scopus 로고
    • The biochemical pharmacology of renin inhibitors: Implications for translational medicine in hypertension, diabetic nephropathy and heart failure: Expectations and reality
    • Abassi Z, Winaver J, Feuerstein GZ. The biochemical pharmacology of renin inhibitors: implications for translational medicine in hypertension, diabetic nephropathy and heart failure: expectations and reality. Biochem Pharmacol 2009; 78: 933-40.
    • (2009) Biochem Pharmacol , vol.78 , pp. 933-940
    • Abassi, Z.1    Winaver, J.2    Feuerstein, G.Z.3
  • 6
    • 77954629331 scopus 로고    scopus 로고
    • Implications of the angiotensin converting enzyme gene insertion/deletion polymorphism in health and disease: A snapshot review
    • Gard PR. Implications of the angiotensin converting enzyme gene insertion/deletion polymorphism in health and disease: a snapshot review. Int J Mol Epidemiol Genet 2010; 1: 145-57.
    • (2010) Int J Mol Epidemiol Genet , vol.1 , pp. 145-157
    • Gard, P.R.1
  • 7
    • 33645074451 scopus 로고    scopus 로고
    • Regulation of aldosterone production from zona glomerulosa cells by ANG II and cAMP: Evidence for PKAindependent activation of CaMK by cAMP
    • Gambaryan S, Butt E, Tas P, Smolenski A, Allolio B, Walter U. Regulation of aldosterone production from zona glomerulosa cells by ANG II and cAMP: evidence for PKAindependent activation of CaMK by cAMP. Am J Physiol Endocrinol Metab 2006; 290: 423-33.
    • (2006) Am J Physiol Endocrinol Metab , vol.290 , pp. 423-433
    • Gambaryan, S.1    Butt, E.2    Tas, P.3    Smolenski, A.4    Allolio, B.5    Walter, U.6
  • 8
    • 77956644609 scopus 로고    scopus 로고
    • The RAAS in the pathogenesis and treatment of diabetic nephropathy
    • Ruggenenti P, Cravedi P, Remuzzi G. The RAAS in the pathogenesis and treatment of diabetic nephropathy. Nat Rev Nephrol 2010; 6: 319-30.
    • (2010) Nat Rev Nephrol , vol.6 , pp. 319-330
    • Ruggenenti, P.1    Cravedi, P.2    Remuzzi, G.3
  • 10
    • 77954052313 scopus 로고    scopus 로고
    • Are "functionally related polymorphisms" of renin-angiotensin-aldosterone system gene polymorphisms associated with hypertension?
    • Hahntow IN, Mairuhu G, van Valkengoed IG, Koopmans RP, Michel MC. Are "functionally related polymorphisms" of renin-angiotensin-aldosterone system gene polymorphisms associated with hypertension? BMC Cardiovasc Disord 2010; 2: 10-23.
    • (2010) BMC Cardiovasc Disord , vol.2 , pp. 10-23
    • Hahntow, I.N.1    Mairuhu, G.2    van Valkengoed, I.G.3    Koopmans, R.P.4    Michel, M.C.5
  • 11
    • 78751478718 scopus 로고    scopus 로고
    • Role of genetic variation in regulation of aldosterone biosynthesis
    • Alvarez-Madrazo S, Connell JM, Freel EM. Role of genetic variation in regulation of aldosterone biosynthesis. Endocr Dev 2011; 20: 106-15.
    • (2011) Endocr Dev , vol.20 , pp. 106-115
    • Alvarez-Madrazo, S.1    Connell, J.M.2    Freel, E.M.3
  • 12
    • 14044262355 scopus 로고    scopus 로고
    • Polymorphisms in CYP11B genes and 11-hydroxylase activity (editorial)
    • White PC, Rainey WE. Polymorphisms in CYP11B genes and 11-hydroxylase activity (editorial). J Clin Endocrinol Metab 2005; 90: 1252-5.
    • (2005) J Clin Endocrinol Metab , vol.90 , pp. 1252-1255
    • White, P.C.1    Rainey, W.E.2
  • 13
    • 0037446134 scopus 로고    scopus 로고
    • Targeted therapy and pharmacogenomic programs
    • Iqbal S, Lenz HJ. Targeted therapy and pharmacogenomic programs. Cancer 2003; 97: 2076-82.
    • (2003) Cancer , vol.97 , pp. 2076-2082
    • Iqbal, S.1    Lenz, H.J.2
  • 14
    • 0142012164 scopus 로고    scopus 로고
    • Detoxification of electrophilic compounds by glutathione S-transferase catalysis: Determinants of individual response to chemical carcinogens and chemotherapeutic drugs?
    • Coles BF, Kadlubar FF. Detoxification of electrophilic compounds by glutathione S-transferase catalysis: determinants of individual response to chemical carcinogens and chemotherapeutic drugs? Biofactors 2003; 17: 115-30.
    • (2003) Biofactors , vol.17 , pp. 115-130
    • Coles, B.F.1    Kadlubar, F.F.2
  • 15
    • 0038345017 scopus 로고    scopus 로고
    • Cancer drugs, genetic variation and the glutathione drug resistance
    • Townsend DM and Tew K. Cancer drugs, genetic variation and the glutathione drug resistance. Cancer Bull 2003; 3: 157-72.
    • (2003) Cancer Bull , vol.3 , pp. 157-172
    • Townsend, D.M.1    Tew, K.2
  • 16
    • 33645111448 scopus 로고    scopus 로고
    • Gluthatione S-transferase polymorphisms: Cancer incidence and therapy
    • McIlwain CC, Townsend DM, Tew K. Gluthatione S-transferase polymorphisms: cancer incidence and therapy. Oncogene 2006; 25: 1639-48.
    • (2006) Oncogene , vol.25 , pp. 1639-1648
    • McIlwain, C.C.1    Townsend, D.M.2    Tew, K.3
  • 17
    • 22944471145 scopus 로고    scopus 로고
    • Cancer chemotherapy and drug metabolism
    • Riddick DS, Lee C, Ramji S, et al. Cancer chemotherapy and drug metabolism. Drug Metab Dispos 2005; 33: 1083-96.
    • (2005) Drug Metab Dispos , vol.33 , pp. 1083-1096
    • Riddick, D.S.1    Lee, C.2    Ramji, S.3
  • 18
    • 79953254791 scopus 로고    scopus 로고
    • Cardiotoxicity after anthracycline chemotherapy in breast carcinoma: Effects on left ventricular ejection fraction, troponin I and brain natriuretic peptide
    • Feola M, Garrone O, Occelli M, et al. Cardiotoxicity after anthracycline chemotherapy in breast carcinoma: effects on left ventricular ejection fraction, troponin I and brain natriuretic peptide. Int J Cardiol 2011; 148: 194-8.
    • (2011) Int J Cardiol , vol.148 , pp. 194-198
    • Feola, M.1    Garrone, O.2    Occelli, M.3
  • 19
    • 84864694032 scopus 로고    scopus 로고
    • Prediction of anthracycline cardiotoxicity after chemotherapy by biomarkers kinetic analysis
    • Garrone O, Crosetto N, Lo Nigro C, et al. Prediction of anthracycline cardiotoxicity after chemotherapy by biomarkers kinetic analysis. Cardiovasc Toxicol 2012; 12: 135-42.
    • (2012) Cardiovasc Toxicol , vol.12 , pp. 135-142
    • Garrone, O.1    Crosetto, N.2    Lo Nigro, C.3
  • 20
    • 0037771145 scopus 로고    scopus 로고
    • Angiotensinogen gene polymorphism, plasma angiotensinogen, and risk of hypertension and ischemic heart disease: A metaanalysis
    • Sethi AA, Nordestgaard BG, Tybjaerg-Hansen A. Angiotensinogen gene polymorphism, plasma angiotensinogen, and risk of hypertension and ischemic heart disease: a metaanalysis. Arterioscler Thromb Vasc Biol 2003; 23: 1269-75.
    • (2003) Arterioscler Thromb Vasc Biol , vol.23 , pp. 1269-1275
    • Sethi, A.A.1    Nordestgaard, B.G.2    Tybjaerg-Hansen, A.3
  • 22
    • 48549092081 scopus 로고    scopus 로고
    • RAS gene polymorphisms, classical risk factors and the advent of coronary artery disease in the Portuguese population
    • Freitas AI, Mendonça I, Brión M, et al. RAS gene polymorphisms, classical risk factors and the advent of coronary artery disease in the Portuguese population. BMC Cardiovasc Disord 2008; 8: 15.
    • (2008) BMC Cardiovasc Disord , vol.8 , pp. 15
    • Freitas, A.I.1    Mendonça, I.2    Brión, M.3
  • 23
    • 0031974469 scopus 로고    scopus 로고
    • Angiotensinogen gene and hypertension in Chinese
    • Niu T, Xu X, Rogus J, et al. Angiotensinogen gene and hypertension in Chinese. J Clin Invest 1998; 101: 188-94.
    • (1998) J Clin Invest , vol.101 , pp. 188-194
    • Niu, T.1    Xu, X.2    Rogus, J.3
  • 25
    • 79955471391 scopus 로고    scopus 로고
    • Association of hypertension drug target genes with blood pressure and hypertension in 86, 588 individuals
    • Johnson AD, Newton-Cheh C, Chasman DI, et al. Association of hypertension drug target genes with blood pressure and hypertension in 86, 588 individuals. Hypertension 2011; 57: 903-10.
    • (2011) Hypertension , vol.57 , pp. 903-910
    • Johnson, A.D.1    Newton-Cheh, C.2    Chasman, D.I.3
  • 26
    • 0025165779 scopus 로고
    • An insertion/deletion polymorphism in the angiotensin I-converting enzyme gene accounting for half the variance of serum enzyme levels
    • Rigat B, Hubert C, Alhenc-Gelas F, Cambien F, Corvol P, Soubrier F. An insertion/deletion polymorphism in the angiotensin I-converting enzyme gene accounting for half the variance of serum enzyme levels. J Clin Invest 1990; 86: 1343-6.
    • (1990) J Clin Invest , vol.86 , pp. 1343-1346
    • Rigat, B.1    Hubert, C.2    Alhenc-Gelas, F.3    Cambien, F.4    Corvol, P.5    Soubrier, F.6
  • 27
    • 0028290165 scopus 로고
    • Angiotensin II type 1 receptor gene polymorphisms in human essential hypertension
    • Bonnardeaux A, Davies E, Jeunemaitre X, et al. Angiotensin II type 1 receptor gene polymorphisms in human essential hypertension. Hypertension 1994; 24: 63-9.
    • (1994) Hypertension , vol.24 , pp. 63-69
    • Bonnardeaux, A.1    Davies, E.2    Jeunemaitre, X.3
  • 28
    • 84858835353 scopus 로고    scopus 로고
    • Association of angiotesin converting enzyme (Insertion/Deletion) gene polymorphism with essential hypertension in northern Indian subjects
    • Srivastava K, Sundriyal R, Meena PC, Bathia J, Narag R, Saluja D. Association of angiotesin converting enzyme (Insertion/Deletion) gene polymorphism with essential hypertension in northern Indian subjects. Genet Test Mol Biomarkers 2012; 16: 174-7.
    • (2012) Genet Test Mol Biomarkers , vol.16 , pp. 174-177
    • Srivastava, K.1    Sundriyal, R.2    Meena, P.C.3    Bathia, J.4    Narag, R.5    Saluja, D.6
  • 29
    • 84856035757 scopus 로고    scopus 로고
    • The ACE I/D polymorphism in US adults: Limited evidence of association with hypertension-related traits and sex-specific effects by race/ethnicity
    • Ned RM, Yesupriva A, Imperatore G, et al. The ACE I/D polymorphism in US adults: limited evidence of association with hypertension-related traits and sex-specific effects by race/ethnicity. Am J Hypertens 2012; 25: 209-15.
    • (2012) Am J Hypertens , vol.25 , pp. 209-215
    • Ned, R.M.1    Yesupriva, A.2    Imperatore, G.3
  • 30
    • 0031044981 scopus 로고    scopus 로고
    • Association of angiotensin II type 1 receptor gene polymorphism with essential hypertension
    • Wang WY, Zee RY, Morris BJ. Association of angiotensin II type 1 receptor gene polymorphism with essential hypertension. Clin Genet 1997; 51: 31-4.
    • (1997) Clin Genet , vol.51 , pp. 31-34
    • Wang, W.Y.1    Zee, R.Y.2    Morris, B.J.3
  • 31
    • 33745674965 scopus 로고    scopus 로고
    • Association of angiotensin II receptor type 1 gene single nucleotide polymorphism with Chinese essential hypertension complicated with coronary heart disease
    • Zhang KX, Liu TB, Xu QX, Zhu DL, Huang W. Association of angiotensin II receptor type 1 gene single nucleotide polymorphism with Chinese essential hypertension complicated with coronary heart disease. Zhonghua Xin Xue Guan Bing Za Zhi 2005; 33: 720-803.
    • (2005) Zhonghua Xin Xue Guan Bing Za Zhi , vol.33 , pp. 720-803
    • Zhang, K.X.1    Liu, T.B.2    Xu, Q.X.3    Zhu, D.L.4    Huang, W.5
  • 32
    • 0034268317 scopus 로고    scopus 로고
    • Genetic determination of human essential hypertension
    • Matsubara M. Genetic determination of human essential hypertension. Tohoku J Exp Med 2000; 192: 19-33.
    • (2000) Tohoku J Exp Med , vol.192 , pp. 19-33
    • Matsubara, M.1
  • 33
    • 34548207751 scopus 로고    scopus 로고
    • The human angiotensin II type 1 receptor +1166 A/C polymorphism attenuates microrna-155 binding
    • Martin MM, Buckenberger JA, Jiang J, et al. The human angiotensin II type 1 receptor +1166 A/C polymorphism attenuates microrna-155 binding. J Biol Chem 2007; 282: 24262-9.
    • (2007) J Biol Chem , vol.282 , pp. 24262-24269
    • Martin, M.M.1    Buckenberger, J.A.2    Jiang, J.3
  • 34
    • 77954039271 scopus 로고    scopus 로고
    • Common genetic variations of the renin-angiotensin-aldosterone system and response to acute angiotensin I-converting enzyme inhibition in essential hypertension
    • Hannila-Handelberg T, Kontula KK, Paukku K, et al. Common genetic variations of the renin-angiotensin-aldosterone system and response to acute angiotensin I-converting enzyme inhibition in essential hypertension. J Hypertension 2010; 28: 771-9.
    • (2010) J Hypertension , vol.28 , pp. 771-779
    • Hannila-Handelberg, T.1    Kontula, K.K.2    Paukku, K.3
  • 35
    • 46249118154 scopus 로고    scopus 로고
    • Role of the C-344T aldosterone synthase gene variant in left ventricular mass and left ventricular structure-related phenotypes
    • Sookoian S, Gianotti TF, Pirola CJ. Role of the C-344T aldosterone synthase gene variant in left ventricular mass and left ventricular structure-related phenotypes. Heart 2008; 94: 903-10.
    • (2008) Heart , vol.94 , pp. 903-910
    • Sookoian, S.1    Gianotti, T.F.2    Pirola, C.J.3
  • 36
    • 0032928892 scopus 로고    scopus 로고
    • Genetic polymorphism of CYP11B2 gene and hypertension in Japanese
    • Tamaki S, Iwai N, Tsujita Y, Kinoshita M. Genetic polymorphism of CYP11B2 gene and hypertension in Japanese. Hypertension 1999; 33: 266-70.
    • (1999) Hypertension , vol.33 , pp. 266-270
    • Tamaki, S.1    Iwai, N.2    Tsujita, Y.3    Kinoshita, M.4
  • 37
    • 0031846630 scopus 로고    scopus 로고
    • Structural analysis and evaluation of the aldosterone synthase gene in hypertension
    • Brand E, Chatelain N, Mulatero P, et al. Structural analysis and evaluation of the aldosterone synthase gene in hypertension. Hypertension 1998; 32: 198-204.
    • (1998) Hypertension , vol.32 , pp. 198-204
    • Brand, E.1    Chatelain, N.2    Mulatero, P.3
  • 38
    • 20844459494 scopus 로고    scopus 로고
    • Cardiac specific increase in aldosterone production induces coronary dysfunction in aldosterone synthase-transgenic mice
    • Garnier A, Bendall JK, Fuchs S, et al. Cardiac specific increase in aldosterone production induces coronary dysfunction in aldosterone synthase-transgenic mice. Circulation 2004; 110: 1819-25.
    • (2004) Circulation , vol.110 , pp. 1819-1825
    • Garnier, A.1    Bendall, J.K.2    Fuchs, S.3
  • 39
    • 14044262355 scopus 로고    scopus 로고
    • Editorial: Polymorphism in CTP11B genes and 11-hydroxylase activity
    • Perrin CW, Rainey WE. Editorial: polymorphism in CTP11B genes and 11-hydroxylase activity. Journ Clin Endocr Metab 2005; 90: 1252-5.
    • (2005) Journ Clin Endocr Metab , vol.90 , pp. 1252-1255
    • Perrin, C.W.1    Rainey, W.E.2
  • 40
    • 77954451576 scopus 로고    scopus 로고
    • GSTT1, GSTM1, and GSTP1 polymorphisms and chemotherapy response in locally advanced breast cancer
    • Oliveira AL, Rodrigues FF, Santos RE, et al. GSTT1, GSTM1, and GSTP1 polymorphisms and chemotherapy response in locally advanced breast cancer. Genet Mol Res 2010; 9: 1045-53.
    • (2010) Genet Mol Res , vol.9 , pp. 1045-1053
    • Oliveira, A.L.1    Rodrigues, F.F.2    Santos, R.E.3
  • 41
    • 0033281601 scopus 로고    scopus 로고
    • Glutathione S-transferase M1 null genotype: Lack of association with tumour characteristics and survival in advanced breast cancer
    • Lizard-Nacol S, Coudert B, Colosetti P, Riedinger JM, Fargeot P, Brunet-Lecomte P. Glutathione S-transferase M1 null genotype: lack of association with tumour characteristics and survival in advanced breast cancer. Breast Cancer Res 1999; 1: 81-7.
    • (1999) Breast Cancer Res , vol.1 , pp. 81-87
    • Lizard-Nacol, S.1    Coudert, B.2    Colosetti, P.3    Riedinger, J.M.4    Fargeot, P.5    Brunet-Lecomte, P.6
  • 42
    • 67349121652 scopus 로고    scopus 로고
    • Detection and relevance of germline genetic polymorphisms in glutathione S-transferases (GSTs) in breast cancer patients from northern Indian population
    • Saxena A, Dhillon VS, Raish M, et al. Detection and relevance of germline genetic polymorphisms in glutathione S-transferases (GSTs) in breast cancer patients from northern Indian population. Breast Cancer Res Treat 2009; 115: 537-43.
    • (2009) Breast Cancer Res Treat , vol.115 , pp. 537-543
    • Saxena, A.1    Dhillon, V.S.2    Raish, M.3
  • 43
    • 73349119364 scopus 로고    scopus 로고
    • Studying the association of polymorphic variants of GSTM1 and GSTT1 genes with breast cancer in female residents of Altai Krai
    • Kostrykina NA, Pechkovskii EV, Mishukova OV, et al. Studying the association of polymorphic variants of GSTM1 and GSTT1 genes with breast cancer in female residents of Altai Krai. Bull Exp Biol Med 2009; 148: 89-93.
    • (2009) Bull Exp Biol Med , vol.148 , pp. 89-93
    • Kostrykina, N.A.1    Pechkovskii, E.V.2    Mishukova, O.V.3
  • 44
    • 78149487509 scopus 로고    scopus 로고
    • Cyclophosphamide-metabolizing enzyme polymorphisms and survival outcomes after adjuvant chemotherapy for node-positive breast cancer: A retrospective cohort study
    • Gor PP, Su HI, Gray RJ, et al. Cyclophosphamide-metabolizing enzyme polymorphisms and survival outcomes after adjuvant chemotherapy for node-positive breast cancer: a retrospective cohort study. Breast Cancer Res 2010; 12: R26.
    • (2010) Breast Cancer Res , vol.12
    • Gor, P.P.1    Su, H.I.2    Gray, R.J.3
  • 45
    • 0035476887 scopus 로고    scopus 로고
    • Polymorphisms in glutathione S-transferases (GSTM1 and GSTT1) and survival after treatment for breast cancer
    • Ambrosone CB, Sweeney C, Coles BF, et al. Polymorphisms in glutathione S-transferases (GSTM1 and GSTT1) and survival after treatment for breast cancer. Cancer Res 2001; 61: 7130-5.
    • (2001) Cancer Res , vol.61 , pp. 7130-7135
    • Ambrosone, C.B.1    Sweeney, C.2    Coles, B.F.3
  • 46
    • 66449113058 scopus 로고    scopus 로고
    • Cruciferousdithiolethionemediated coordinated induction of total cellular and mitochondrial antioxidants and phase 2 enzymes in human primary cardiomyocytes: Cytoprotection against oxidative/electrophilic stress and doxorubicin toxicity
    • Zhu H, Jia Z, Zhou K, et al. Cruciferousdithiolethionemediated coordinated induction of total cellular and mitochondrial antioxidants and phase 2 enzymes in human primary cardiomyocytes: cytoprotection against oxidative/electrophilic stress and doxorubicin toxicity. Exp Biol Med 2009; 234: 418-29.
    • (2009) Exp Biol Med , vol.234 , pp. 418-429
    • Zhu, H.1    Jia, Z.2    Zhou, K.3


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