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Volumn 11, Issue 8, 1998, Pages 888-894

Nucleic acid alkylation by free radical metabolites of ethanol. Formation of 8-(1-hydroxyethyl)guanine and 8-(2-hydroxyethyl)guanine adducts

Author keywords

[No Author keywords available]

Indexed keywords

8 (1 HYDROXYETHYL)GUANINE; 8 (2 HYDROXYETHYL)GUANINE; FREE RADICAL; NUCLEIC ACID; UNCLASSIFIED DRUG;

EID: 0031819230     PISSN: 0893228X     EISSN: None     Source Type: Journal    
DOI: 10.1021/tx9800351     Document Type: Article
Times cited : (21)

References (52)
  • 1
    • 0030991468 scopus 로고    scopus 로고
    • Alcohol and gastrointesinal cancer: Pathogenic mechanisms
    • Seitz, H., and Pöschl, G. (1997) Alcohol and gastrointesinal cancer: pathogenic mechanisms. Addit. Biol. 2, 19-33.
    • (1997) Addit. Biol. , vol.2 , pp. 19-33
    • Seitz, H.1    Pöschl, G.2
  • 2
    • 0030963846 scopus 로고    scopus 로고
    • DNA damage, DNA repair and alcohol toxicity-a review
    • Brooks, P. J. (1997) DNA damage, DNA repair and alcohol toxicity-a review. Alcohol Clin. Exp. Res. 21, 1073-1082.
    • (1997) Alcohol Clin. Exp. Res. , vol.21 , pp. 1073-1082
    • Brooks, P.J.1
  • 4
    • 0025168419 scopus 로고
    • DNA cleavage during ethanol metabolism: Role of Superoxide radicals and catalytic iron
    • Rajasinghe, H., Jayatilleke, E., and Shaw, S. (1990) DNA cleavage during ethanol metabolism: role of Superoxide radicals and catalytic iron. Life Sci. 47, 807-814.
    • (1990) Life Sci. , vol.47 , pp. 807-814
    • Rajasinghe, H.1    Jayatilleke, E.2    Shaw, S.3
  • 5
    • 0030597971 scopus 로고    scopus 로고
    • Nuclear DNA strand breaks during ethanol-induced oxidative stress in rat brain
    • Renis, M., Calabrese, V., Russo, A., Calderone, A., Barcellona, M. L., and Rizza, V. (1996) Nuclear DNA strand breaks during ethanol-induced oxidative stress in rat brain. FEBS Lett. 390, 153-156.
    • (1996) FEBS Lett. , vol.390 , pp. 153-156
    • Renis, M.1    Calabrese, V.2    Russo, A.3    Calderone, A.4    Barcellona, M.L.5    Rizza, V.6
  • 6
    • 0023488842 scopus 로고
    • Reactive free radical generation in vivo in heart and liver of ethanol-fed rats: Correlation with free radical formation in vitro
    • Reinke, L. A., Lai, K., DuBose, C. M., and McCay, P. B. (1987) Reactive free radical generation in vivo in heart and liver of ethanol-fed rats: correlation with free radical formation in vitro. Proc. Natl. Acad. Sci. U.S.A. 84, 9223-9227.
    • (1987) Proc. Natl. Acad. Sci. U.S.A. , vol.84 , pp. 9223-9227
    • Reinke, L.A.1    Lai, K.2    DuBose, C.M.3    McCay, P.B.4
  • 7
    • 0023911853 scopus 로고
    • Spin-trapping of free radical species produced during microsomal metabolism of ethanol
    • Albano, E., Tomasi, A., Goria-Gatti, L., and Dianzani, M. U. (1988) Spin-trapping of free radical species produced during microsomal metabolism of ethanol. Chem.-Biol. Interact. 65, 223-234.
    • (1988) Chem.-Biol. Interact. , vol.65 , pp. 223-234
    • Albano, E.1    Tomasi, A.2    Goria-Gatti, L.3    Dianzani, M.U.4
  • 8
    • 0025372160 scopus 로고
    • In vivo formation of a free radical metabolite of ethanol
    • Knecht, K. T., Bradford, B. U., and Mason, R. P. (1990) In vivo formation of a free radical metabolite of ethanol. Mol. Pharmacol. 38, 26-30.
    • (1990) Mol. Pharmacol. , vol.38 , pp. 26-30
    • Knecht, K.T.1    Bradford, B.U.2    Mason, R.P.3
  • 9
    • 0029962091 scopus 로고    scopus 로고
    • 1-Hydroxyethyl radical formation during NADPH- And NADH-dependent oxidation of ethanol by human liver microsomes
    • Rao, D. N. R., Yang, M.-X., Lasker, J. M., and Cederbaum, A I. (1996) 1-Hydroxyethyl radical formation during NADPH- and NADH-dependent oxidation of ethanol by human liver microsomes. Mol. Pharmacol. 49, 814-821.
    • (1996) Mol. Pharmacol. , vol.49 , pp. 814-821
    • Rao, D.N.R.1    Yang, M.-X.2    Lasker, J.M.3    Cederbaum, A.I.4
  • 10
    • 0031543495 scopus 로고    scopus 로고
    • Mechanisms for metabolism of ethanol to 1-hydroxyethyl radicals in rat liver microsomes
    • Reinke, L. A., Moore, D. R., and McCay, P. B. (1997) Mechanisms for metabolism of ethanol to 1-hydroxyethyl radicals in rat liver microsomes. Arch. Biochem. Biophys. 348, 9-14.
    • (1997) Arch. Biochem. Biophys. , vol.348 , pp. 9-14
    • Reinke, L.A.1    Moore, D.R.2    McCay, P.B.3
  • 11
    • 0027986438 scopus 로고
    • Ethanol-derived immunoreactive species formed by free radical mechanisms
    • Moncada, C., Torres, V., Varghese, G. Albano, E., and Israel, Y. (1994) Ethanol-derived immunoreactive species formed by free radical mechanisms. Mol. Pharmacol. 46, 786-791.
    • (1994) Mol. Pharmacol. , vol.46 , pp. 786-791
    • Moncada, C.1    Torres, V.2    Varghese, G.3    Albano, E.4    Israel, Y.5
  • 12
    • 0028812377 scopus 로고
    • Detection of antibodies against protein modified by hydroxyethyl free radicals in patients with alcoholic cirrhosis
    • Clot, P., Bellomo, G., Tabone, M., Aricó, S., and Albano, E. (1995) Detection of antibodies against protein modified by hydroxyethyl free radicals in patients with alcoholic cirrhosis. Gastroenterology 108, 201-207.
    • (1995) Gastroenterology , vol.108 , pp. 201-207
    • Clot, P.1    Bellomo, G.2    Tabone, M.3    Aricó, S.4    Albano, E.5
  • 14
    • 0027220027 scopus 로고
    • Alkylation and cleavage of DNA by carboncentered free radical metabolites
    • Augusto, O. (1993) Alkylation and cleavage of DNA by carboncentered free radical metabolites. Free Radic. Biol. Med. 15, 329-336.
    • (1993) Free Radic. Biol. Med. , vol.15 , pp. 329-336
    • Augusto, O.1
  • 15
    • 0015932259 scopus 로고
    • Photochemical reactions of nucleic acid constituents. Peroxide-initiated reactions of purines with alcohols
    • Salomon, J., and Elad, D. (1973) Photochemical reactions of nucleic acid constituents. Peroxide-initiated reactions of purines with alcohols. J. Org. Chem. 38, 3420-3421.
    • (1973) J. Org. Chem. , vol.38 , pp. 3420-3421
    • Salomon, J.1    Elad, D.2
  • 16
    • 0019052890 scopus 로고
    • Specific photoalkylation of poly U and poly A with 2-propanol and their messenger properties
    • Livneh, Z., Livneh, E., and Sperling, J. (1980). Specific photoalkylation of poly U and poly A with 2-propanol and their messenger properties. Photochem. Photobiol. 32, 131-135.
    • (1980) Photochem. Photobiol. , vol.32 , pp. 131-135
    • Livneh, Z.1    Livneh, E.2    Sperling, J.3
  • 17
    • 0020432035 scopus 로고
    • Light-induced free reactions of purines and pyrimidines in deoxyribonucleic acid. Effect of structure and base sequence on reactivity
    • Livneh, E., Elad, D., and Sperling, J. (1982) Light-induced free reactions of purines and pyrimidines in deoxyribonucleic acid. Effect of structure and base sequence on reactivity. Biochemistry 21, 3698-3703.
    • (1982) Biochemistry , vol.21 , pp. 3698-3703
    • Livneh, E.1    Elad, D.2    Sperling, J.3
  • 18
    • 0025688436 scopus 로고
    • Formation of 8-methylguanine as a result of DNA alkylation by methyl radicals generated during horseradish peroxidase-catalyzed oxidation of methylhydrazine
    • Augusto, O., Cavalieri, E. L., Rogan, E. G., Ramakrishna, N. V. S., and Kolar, C. (1990) Formation of 8-methylguanine as a result of DNA alkylation by methyl radicals generated during horseradish peroxidase-catalyzed oxidation of methylhydrazine. J. Biol. Chem. 265, 22093-22096.
    • (1990) J. Biol. Chem. , vol.265 , pp. 22093-22096
    • Augusto, O.1    Cavalieri, E.L.2    Rogan, E.G.3    Ramakrishna, N.V.S.4    Kolar, C.5
  • 19
    • 0026612456 scopus 로고
    • Identification of C8-methyl guanine in the hydrolysates of DNA from rats administered 1,2-dimethylhydrazine. Evidence for in vivo DNA alkylation by methyl radicals
    • Netto, L. E. S., Ramakrishna, N. V. S., Kolar, C. Cavalieri, E. L., Rogan, E. G., Lawson, T. A., and Augusto, O. (1992) Identification of C8-methyl guanine in the hydrolysates of DNA from rats administered 1,2-dimethylhydrazine. Evidence for in vivo DNA alkylation by methyl radicals. J. Biol. Chem. 267, 21524-21527.
    • (1992) J. Biol. Chem. , vol.267 , pp. 21524-21527
    • Netto, L.E.S.1    Ramakrishna, N.V.S.2    Kolar, C.3    Cavalieri, E.L.4    Rogan, E.G.5    Lawson, T.A.6    Augusto, O.7
  • 20
    • 0029114551 scopus 로고
    • DNA methylation by tert-butylhydroperoxide-iron(II)
    • Hix, S., Morais, M. S., and Augusto, O. (1995) DNA methylation by tert-butylhydroperoxide-iron(II). Free Radic. Biol. Med. 19, 293-301.
    • (1995) Free Radic. Biol. Med. , vol.19 , pp. 293-301
    • Hix, S.1    Morais, M.S.2    Augusto, O.3
  • 21
    • 0026762289 scopus 로고
    • Substitution of p and o-hydroxyphenyl radicals at the 8 position of purine nucleosides by reaction with mutagenic diazoquinone compounds
    • Kikugawa, K, Kato, T., and Kojima, K. (1992) Substitution of p and o-hydroxyphenyl radicals at the 8 position of purine nucleosides by reaction with mutagenic diazoquinone compounds. Mutat. Res. 268, 105-114.
    • (1992) Mutat. Res. , vol.268 , pp. 105-114
    • Kikugawa, K.1    Kato, T.2    Kojima, K.3
  • 23
    • 0029845883 scopus 로고    scopus 로고
    • Synthesis, miscoding specifity, and thermodynamic stability of oligodeoxynucleotide containing 8-methyl-2′-deoxyguanosine
    • Kohda, K., Tsunomoto, H., Minoura, Y., Tanabe, K., and Shibutani, S. (1996) Synthesis, miscoding specifity, and thermodynamic stability of oligodeoxynucleotide containing 8-methyl-2′-deoxyguanosine. Chem. Res. Toxicol. 9, 1278-1284.
    • (1996) Chem. Res. Toxicol. , vol.9 , pp. 1278-1284
    • Kohda, K.1    Tsunomoto, H.2    Minoura, Y.3    Tanabe, K.4    Shibutani, S.5
  • 24
    • 0031472574 scopus 로고    scopus 로고
    • Synthesis and miscoding specifity of oligodeoxynucleotide containing 8-phenyl-2′-deoxyguanosine
    • Kohda, K., Tsunomoto, H., Kasamatsu, T., Sawamura, F., Terashima, I., and Shibutani, S. (1997) Synthesis and miscoding specifity of oligodeoxynucleotide containing 8-phenyl-2′-deoxyguanosine. Chem. Res. Toxicol. 10, 1351-1358.
    • (1997) Chem. Res. Toxicol. , vol.10 , pp. 1351-1358
    • Kohda, K.1    Tsunomoto, H.2    Kasamatsu, T.3    Sawamura, F.4    Terashima, I.5    Shibutani, S.6
  • 26
    • 0026768075 scopus 로고
    • Detection of lipid radicals by electron paramagnetic resonance spin trapping using intact cells enriched with polyunsaturated acids
    • North, J. A., Spectro, A. A., and Buettner, G. (1992) Detection of lipid radicals by electron paramagnetic resonance spin trapping using intact cells enriched with polyunsaturated acids. J. Biol. Chem. 267, 5743-5746.
    • (1992) J. Biol. Chem. , vol.267 , pp. 5743-5746
    • North, J.A.1    Spectro, A.A.2    Buettner, G.3
  • 28
    • 0016158648 scopus 로고
    • Studies on chemical alterations of nucleic acid and their components-VII C-alkylation of purine bases through free radical process catalyzed by ferrous ion
    • Maeda, M., Nushi, K., and Kawazoe, Y. (1974) Studies on chemical alterations of nucleic acid and their components-VII C-alkylation of purine bases through free radical process catalyzed by ferrous ion. Tetrahedron 30, 2677-2682.
    • (1974) Tetrahedron , vol.30 , pp. 2677-2682
    • Maeda, M.1    Nushi, K.2    Kawazoe, Y.3
  • 29
    • 0019413555 scopus 로고
    • Aberrant methylation of liver DNA during hepatotoxicity
    • Barrows, L. R., and Shank, R. C. (1981) Aberrant methylation of liver DNA during hepatotoxicity. Toxicol. Appl. Pharmacol. 60, 334-345.
    • (1981) Toxicol. Appl. Pharmacol. , vol.60 , pp. 334-345
    • Barrows, L.R.1    Shank, R.C.2
  • 30
    • 0027369680 scopus 로고
    • Methylation of RNA purine bases by methyl radicals
    • Kang, J. O., Gallargher, K. S., and Cohen, G. (1993) Methylation of RNA purine bases by methyl radicals. Arch. Biochem. Biophys. 306, 178-182.
    • (1993) Arch. Biochem. Biophys. , vol.306 , pp. 178-182
    • Kang, J.O.1    Gallargher, K.S.2    Cohen, G.3
  • 32
    • 3542991666 scopus 로고
    • Electrochemical detection of C8-methylguanine: A potential marker for monitoring DNA alkylation by methyl radicals
    • Davies, K. J. A., and Ursini, F., Eds. CLEUP Press, Padova, Italy
    • Gomes, L. F., Netto, L. E. S., and Augusto, O. (1995) Electrochemical detection of C8-methylguanine: a potential marker for monitoring DNA alkylation by methyl radicals. In The Oxygen Paradox (Davies, K. J. A., and Ursini, F., Eds.) pp 149-156, CLEUP Press, Padova, Italy.
    • (1995) The Oxygen Paradox , pp. 149-156
    • Gomes, L.F.1    Netto, L.E.S.2    Augusto, O.3
  • 33
    • 0024523950 scopus 로고
    • Detection of DNA adducts by high-performance liquid chromatography with electrochemical detection
    • Park, J.-W., Cundy, K. C., and Ames, B. N. (1989) Detection of DNA adducts by high-performance liquid chromatography with electrochemical detection. Carcinogenesis 10, 827-832.
    • (1989) Carcinogenesis , vol.10 , pp. 827-832
    • Park, J.-W.1    Cundy, K.C.2    Ames, B.N.3
  • 34
    • 0000774091 scopus 로고
    • Spin-trapping of alkyl radicals by a water-soluble nitroso aromatic spin-trap, 3,5-dibromo-4-nitrosobenzenesulfonate
    • Ozawa, T., an Hanaki, A. (1987) Spin-trapping of alkyl radicals by a water-soluble nitroso aromatic spin-trap, 3,5-dibromo-4-nitrosobenzenesulfonate. Bull. Chem. Soc. Jpn. 60, 2304-2306.
    • (1987) Bull. Chem. Soc. Jpn. , vol.60 , pp. 2304-2306
    • Ozawa, T.1    Hanaki, A.2
  • 35
    • 0039963780 scopus 로고
    • Electron paramagnetic resonance study of the reactions of the spin trap 3,5-dibromo-4-nitrosobenzenesulfonate
    • Smith, P., and Robertson, J. S. (1988) Electron paramagnetic resonance study of the reactions of the spin trap 3,5-dibromo-4-nitrosobenzenesulfonate. Can. J. Chem. 66, 1153-1158.
    • (1988) Can. J. Chem. , vol.66 , pp. 1153-1158
    • Smith, P.1    Robertson, J.S.2
  • 37
    • 0025869755 scopus 로고
    • Damage to the DNA bases in mammalian chromatin by hydrogen peroxide in the presence of ferric and cupric ions
    • Dizdaroglu, M., Rao, G., Halliwell, B., and Gajewski, E. (1991) Damage to the DNA bases in mammalian chromatin by hydrogen peroxide in the presence of ferric and cupric ions. Arch. Biochem. Biophys. 285, 317-324.
    • (1991) Arch. Biochem. Biophys. , vol.285 , pp. 317-324
    • Dizdaroglu, M.1    Rao, G.2    Halliwell, B.3    Gajewski, E.4
  • 38
    • 0028691021 scopus 로고
    • DNA damage caused by oxidation, deamination, ultraviolet radiation and photoexcited psoralens
    • Hemminki, K., Dipple, A., Shuker, D. E. G., Kadlubar, F. F., Segerbäck, D., and Bartsch, H., Eds. IARC Scientific Publications, Lyon, France
    • Cadet, J. (1994) DNA damage caused by oxidation, deamination, ultraviolet radiation and photoexcited psoralens. In DNA adducts: Identification and biological significance (Hemminki, K., Dipple, A., Shuker, D. E. G., Kadlubar, F. F., Segerbäck, D., and Bartsch, H., Eds.) pp 245-276, IARC Scientific Publications, Lyon, France.
    • (1994) DNA Adducts: Identification and Biological Significance , pp. 245-276
    • Cadet, J.1
  • 39
    • 0029789377 scopus 로고    scopus 로고
    • Oxidative damage to DNA constituents by iron-mediated Fenton reactions. the deoxyguanosine family
    • Henle, E. S., Luo, Y., Gassmann, W., and Linn, S. (1996) Oxidative damage to DNA constituents by iron-mediated Fenton reactions. The deoxyguanosine family. J. Biol. Chem. 271, 21177-21186.
    • (1996) J. Biol. Chem. , vol.271 , pp. 21177-21186
    • Henle, E.S.1    Luo, Y.2    Gassmann, W.3    Linn, S.4
  • 40
    • 0029661922 scopus 로고    scopus 로고
    • 3+, and oxygen react with DNA-derived radicals formed during iron-mediated Fenton reactions
    • 3+, and oxygen react with DNA-derived radicals formed during iron-mediated Fenton reactions. Biochemistry 35, 12212-12219.
    • (1996) Biochemistry , vol.35 , pp. 12212-12219
    • Henle, E.S.1    Luo, Y.2    Linn, S.3
  • 41
    • 0029783851 scopus 로고    scopus 로고
    • Competitive reactions of peroxynitrite with 2′-deoxyguanosine and 7,8-dihydro-8-oxo-2′-deoxyguanosine (8-ox-odG): Relevance to the formation of 8-oxodG in DNA exposed to peroxynitrite
    • Uppu, R. M., Cueto, R., Squadrito, G. L., Salgo, M. G., and Pryor, W. A. (1996) Competitive reactions of peroxynitrite with 2′-deoxyguanosine and 7,8-dihydro-8-oxo-2′-deoxyguanosine (8-ox-odG): relevance to the formation of 8-oxodG in DNA exposed to peroxynitrite. Free Radic. Biol. Med. 21, 407-411.
    • (1996) Free Radic. Biol. Med. , vol.21 , pp. 407-411
    • Uppu, R.M.1    Cueto, R.2    Squadrito, G.L.3    Salgo, M.G.4    Pryor, W.A.5
  • 43
    • 0342887892 scopus 로고
    • Spin-trapping studies of xenobiotic mediated toxicity
    • Miquel, J., Ed. CRC Press, Boca Raton, FL
    • Augusto, O. (1989) Spin-trapping studies of xenobiotic mediated toxicity. In CRC Handbook of Biomedicine of Free Radicals and Antioxidants (Miquel, J., Ed.) Vol. III, pp 193-208, CRC Press, Boca Raton, FL.
    • (1989) CRC Handbook of Biomedicine of Free Radicals and Antioxidants , vol.3 , pp. 193-208
    • Augusto, O.1
  • 44
    • 0000452931 scopus 로고
    • Nitroxide radical adducts in biology: Chemistry, applications and pitfalls
    • Berliner, L. J., and Reuben, J., Eds. Plenum, New York
    • Motley, C., and Mason, R. P. (1989) Nitroxide radical adducts in biology: chemistry, applications and pitfalls. In Biological Magnetic Resonance (Berliner, L. J., and Reuben, J., Eds.) Vol. 8, pp 489-546, Plenum, New York.
    • (1989) Biological Magnetic Resonance , vol.8 , pp. 489-546
    • Motley, C.1    Mason, R.P.2
  • 45
    • 0025907844 scopus 로고
    • DNAiron(III): Complex formation and catalytic activity in the oxidation of hydrazine derivatives
    • Netto, L. E. S., Ferreira, A. M. C., and Augusto, O. (1991) DNAiron(III): complex formation and catalytic activity in the oxidation of hydrazine derivatives. Chem.-Biol. Interact. 79, 1-14.
    • (1991) Chem.-Biol. Interact. , vol.79 , pp. 1-14
    • Netto, L.E.S.1    Ferreira, A.M.C.2    Augusto, O.3
  • 46
  • 47
    • 0000450518 scopus 로고
    • Pulse radiolytic study of the site of OH radical attack on aliphatic alcohols in aqueous solution
    • Asmus, K.-D., Mockel, H., and Henglein, A. (1973) Pulse radiolytic study of the site of OH radical attack on aliphatic alcohols in aqueous solution. J. Phys. Chem. 77, 1218-1221.
    • (1973) J. Phys. Chem. , vol.77 , pp. 1218-1221
    • Asmus, K.-D.1    Mockel, H.2    Henglein, A.3
  • 48
    • 0025142664 scopus 로고
    • Distinction between hydroxyl radical and ferryl species
    • Rush, J. D., Maskos, Z., and Koppenol, W. H. (1990) Distinction between hydroxyl radical and ferryl species. Methods Enzymol. 186, 148-156.
    • (1990) Methods Enzymol. , vol.186 , pp. 148-156
    • Rush, J.D.1    Maskos, Z.2    Koppenol, W.H.3
  • 49
    • 1542789741 scopus 로고
    • Fenton's reagent revisited
    • Walling, C. (1975) Fenton's reagent revisited. Acc. Chem. Res. 8, 125-150.
    • (1975) Acc. Chem. Res. , vol.8 , pp. 125-150
    • Walling, C.1
  • 50
    • 0342579571 scopus 로고
    • Nucleoside adducts are formed by cooperative reaction of acetaldehyde and alcohols: Possible mechanism for the role of ethanol in carcinogenesis
    • Frankel-Conrat, H., and Singer, B. (1988) Nucleoside adducts are formed by cooperative reaction of acetaldehyde and alcohols: Possible mechanism for the role of ethanol in carcinogenesis. Proc. Natl. Acad. Sci. U.S.A. 85, 3758-3761.
    • (1988) Proc. Natl. Acad. Sci. U.S.A. , vol.85 , pp. 3758-3761
    • Frankel-Conrat, H.1    Singer, B.2
  • 51
    • 0031416803 scopus 로고    scopus 로고
    • Detection of DNA adducts of acetaldehyde in peripheral white blood cells of alcohol abusers
    • Fang, J.-L., and Vaca, C. E. (1997) Detection of DNA adducts of acetaldehyde in peripheral white blood cells of alcohol abusers. Carcinogenesis 18, 627-632.
    • (1997) Carcinogenesis , vol.18 , pp. 627-632
    • Fang, J.-L.1    Vaca, C.E.2
  • 52
    • 0024437033 scopus 로고
    • Genetic toxicology of oxygen
    • Joenje, H. (1989) Genetic toxicology of oxygen. Mutat. Res. 219, 193-208.
    • (1989) Mutat. Res. , vol.219 , pp. 193-208
    • Joenje, H.1


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