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Volumn 54, Issue 2, 1997, Pages 249-257

Adaptation of human tumor cells to tirapazamine under aerobic conditions. Implications of increased antioxidant enzyme activity to mechanism of aerobic cytotoxicity

Author keywords

Bioreductive drugs; Manganese superoxide dismutase; NADPH cytochrome P450 reductase; Oxidative stress; Tirapazamine

Indexed keywords

MANGANESE SUPEROXIDE DISMUTASE; REDUCED NICOTINAMIDE ADENINE DINUCLEOTIDE FERRIHEMOPROTEIN REDUCTASE; TIRAPAZAMINE;

EID: 0030738399     PISSN: 00062952     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0006-2952(97)00171-8     Document Type: Article
Times cited : (59)

References (51)
  • 1
    • 0002377529 scopus 로고
    • 2 histography
    • Eds. Vaupel PW, Kellerer DK and Gunderoth M. Gustav Fischer, Stuttgart
    • 2 histography. In: Tumor Oxygenation (Eds. Vaupel PW, Kellerer DK and Gunderoth M), pp. 219-232. Gustav Fischer, Stuttgart, 1995.
    • (1995) Tumor Oxygenation , pp. 219-232
    • Vaupel, P.W.1    Höckel, M.2
  • 3
    • 0023082510 scopus 로고
    • Tumor hypoxia: Its impact on cancer therapy
    • Moulder JE and Rockwell S, Tumor hypoxia: Its impact on cancer therapy. Cancer Metastasis Rev 5: 313-341, 1987.
    • (1987) Cancer Metastasis Rev , vol.5 , pp. 313-341
    • Moulder, J.E.1    Rockwell, S.2
  • 4
    • 0023555121 scopus 로고
    • Hypoxic cells as specific drug targets for chemotherapy
    • Kennedy KA, Hypoxic cells as specific drug targets for chemotherapy. Anticancer Drug Des 2: 181-194, 1987.
    • (1987) Anticancer Drug Des , vol.2 , pp. 181-194
    • Kennedy, K.A.1
  • 5
    • 0023902264 scopus 로고
    • Therapeutic attack of hypoxic cells of solid tumors: Presidential address
    • Sartorelli AC, Therapeutic attack of hypoxic cells of solid tumors: Presidential address. Cancer Res 48: 775-778, 1988.
    • (1988) Cancer Res , vol.48 , pp. 775-778
    • Sartorelli, A.C.1
  • 8
    • 0029955072 scopus 로고    scopus 로고
    • Pretreatment oxygenation predicts radiation response in advanced squamous cell carcinoma of the head and neck
    • Nordsmark M, Overgaard M and Overgaard J, Pretreatment oxygenation predicts radiation response in advanced squamous cell carcinoma of the head and neck. Radiother Oncol 41: 31-40, 1996.
    • (1996) Radiother Oncol , vol.41 , pp. 31-40
    • Nordsmark, M.1    Overgaard, M.2    Overgaard, J.3
  • 9
    • 0027219332 scopus 로고
    • Bioreducible mustards: A paradigm for hypoxia-selective prodrugs of diffusible cytotoxins (HPDCs)
    • Denny WA and Wilson WR, Bioreducible mustards: A paradigm for hypoxia-selective prodrugs of diffusible cytotoxins (HPDCs). Cancer Metastasis Rev 12: 135-151, 1993.
    • (1993) Cancer Metastasis Rev , vol.12 , pp. 135-151
    • Denny, W.A.1    Wilson, W.R.2
  • 10
    • 0027328452 scopus 로고
    • The experimental development of bioreductive drugs and their role in cancer therapy
    • Workman P and Stratford IJ, The experimental development of bioreductive drugs and their role in cancer therapy. Cancer Metastasis Rev 12: 73-82, 1993.
    • (1993) Cancer Metastasis Rev , vol.12 , pp. 73-82
    • Workman, P.1    Stratford, I.J.2
  • 11
    • 0030028884 scopus 로고    scopus 로고
    • Hypoxia-specific cytotoxins in cancer therapy
    • Brown JM and Sum BG, Hypoxia-specific cytotoxins in cancer therapy. Semin Radiat Oncol 6: 22-36, 1996.
    • (1996) Semin Radiat Oncol , vol.6 , pp. 22-36
    • Brown, J.M.1    Sum, B.G.2
  • 12
    • 0022493495 scopus 로고
    • SR-4233: A new bioreductive agent with high selective toxicity for hypoxic mammalian cells
    • Zeman EM, Brown JM, Lemmon MJ, Hirst VK and Lee WW, SR-4233: A new bioreductive agent with high selective toxicity for hypoxic mammalian cells. Int J Radiat Oncol Biol Phys 12: 1239-1242, 1986.
    • (1986) Int J Radiat Oncol Biol Phys , vol.12 , pp. 1239-1242
    • Zeman, E.M.1    Brown, J.M.2    Lemmon, M.J.3    Hirst, V.K.4    Lee, W.W.5
  • 13
    • 0028235953 scopus 로고
    • Reoxygenation and rehypoxiation in the SCCVII mouse tumor
    • Kim IH and Brown JM, Reoxygenation and rehypoxiation in the SCCVII mouse tumor. Int J Radiat Oncol Biol Phys 29: 493-497, 1994.
    • (1994) Int J Radiat Oncol Biol Phys , vol.29 , pp. 493-497
    • Kim, I.H.1    Brown, J.M.2
  • 14
    • 0028603270 scopus 로고
    • The influence of microenvironmental factors during cancer therapy
    • Durand RE, The influence of microenvironmental factors during cancer therapy. In Vivo 8: 691-702, 1994.
    • (1994) In Vivo , vol.8 , pp. 691-702
    • Durand, R.E.1
  • 15
    • 0027227590 scopus 로고
    • Unusual oxygen concentration dependence of toxicity of SR-4233, a hypoxic cell toxin
    • Koch CJ, Unusual oxygen concentration dependence of toxicity of SR-4233, a hypoxic cell toxin. Cancer Res 53: 3992-3997, 1993.
    • (1993) Cancer Res , vol.53 , pp. 3992-3997
    • Koch, C.J.1
  • 16
    • 0025646401 scopus 로고
    • Potentiation by the hypoxic cytotoxin SR 4233 of cell killing produced by fractionated irradiation of mouse tumors
    • Brown JM and Lemmon MJ, Potentiation by the hypoxic cytotoxin SR 4233 of cell killing produced by fractionated irradiation of mouse tumors. Cancer Res 50: 7745-7749, 1990.
    • (1990) Cancer Res , vol.50 , pp. 7745-7749
    • Brown, J.M.1    Lemmon, M.J.2
  • 17
    • 0025972731 scopus 로고
    • Tumor hypoxia can be exploited to preferentially sensitize tumors to fractionated irradiation
    • Brown JM and Lemmon MJ, Tumor hypoxia can be exploited to preferentially sensitize tumors to fractionated irradiation. Int J Radiat Oncol Biol Phys 20: 457-461, 1991.
    • (1991) Int J Radiat Oncol Biol Phys , vol.20 , pp. 457-461
    • Brown, J.M.1    Lemmon, M.J.2
  • 18
    • 84965808588 scopus 로고
    • Tumor-specific, schedule-dependent interaction between tirapazamine (SR 4233) and cisplatin
    • Dorie MJ and Brown JM, Tumor-specific, schedule-dependent interaction between tirapazamine (SR 4233) and cisplatin. Cancer Res 53: 4633-4636, 1993.
    • (1993) Cancer Res , vol.53 , pp. 4633-4636
    • Dorie, M.J.1    Brown, J.M.2
  • 19
    • 0007781682 scopus 로고
    • Potentiation of the anticancer effect of cisplatin by the hypoxic cytotoxin tirapazamine
    • Eds. Vaupel PW, Kellerer DK and Gunderoth M. Gustav Fischer, Stuttgart
    • Dorie MJ and Brown JM, Potentiation of the anticancer effect of cisplatin by the hypoxic cytotoxin tirapazamine. In: Tumor Oxygenation (Eds. Vaupel PW, Kellerer DK and Gunderoth M), pp. 125-135. Gustav Fischer, Stuttgart, 1995.
    • (1995) Tumor Oxygenation , pp. 125-135
    • Dorie, M.J.1    Brown, J.M.2
  • 20
    • 0028276699 scopus 로고
    • Synergistic interaction between tirapazamine and cyclophosphamide in human breast cancer xenografts
    • Langmuir VK, Rooker JA, Osen M, Mendonca HL and Laderoute KR, Synergistic interaction between tirapazamine and cyclophosphamide in human breast cancer xenografts. Cancer Res 54: 2845-2847, 1994.
    • (1994) Cancer Res , vol.54 , pp. 2845-2847
    • Langmuir, V.K.1    Rooker, J.A.2    Osen, M.3    Mendonca, H.L.4    Laderoute, K.R.5
  • 21
    • 0027288316 scopus 로고
    • SR 4233 (tirapazamine): A new anticancer drug exploiting hypoxia in solid tumours
    • Brown JM, SR 4233 (tirapazamine): A new anticancer drug exploiting hypoxia in solid tumours. Br J Cancer 67: 1163-1170, 1993.
    • (1993) Br J Cancer , vol.67 , pp. 1163-1170
    • Brown, J.M.1
  • 23
    • 0025284525 scopus 로고
    • Enzymology of the reductive bioactivation of SR 4233. A novel benzotriazine di-N-oxide hypoxic cell cytotoxin
    • Walton MI and Workman P, Enzymology of the reductive bioactivation of SR 4233. A novel benzotriazine di-N-oxide hypoxic cell cytotoxin. Biochem Pharmacol 39: 1735-1742, 1990.
    • (1990) Biochem Pharmacol , vol.39 , pp. 1735-1742
    • Walton, M.I.1    Workman, P.2
  • 24
    • 0026642263 scopus 로고
    • The role of cytochrome P450 and cytochrome P450 reductase in the reductive bioactivation of the novel benzotriazine di-N-oxide hypoxic cytotoxin 3-amino-1,2,4-benzotriazine-1,4-dioxide (SR 4233, WIN 59075) by mouse liver
    • Walton MI, Wolf CR and Workman P, The role of cytochrome P450 and cytochrome P450 reductase in the reductive bioactivation of the novel benzotriazine di-N-oxide hypoxic cytotoxin 3-amino-1,2,4-benzotriazine-1,4-dioxide (SR 4233, WIN 59075) by mouse liver. Biochem Pharmocol 44: 251-259, 1992.
    • (1992) Biochem Pharmocol , vol.44 , pp. 251-259
    • Walton, M.I.1    Wolf, C.R.2    Workman, P.3
  • 25
    • 0027418726 scopus 로고
    • Metabolism of the bioreductive cytotoxin SR 4233 by tumour cells: Enzymatic studies
    • Wang J, Biedermann KA, Wolf CR and Brown JM, Metabolism of the bioreductive cytotoxin SR 4233 by tumour cells: Enzymatic studies. Br J Cancer 67:321-325, 1993.
    • (1993) Br J Cancer , vol.67 , pp. 321-325
    • Wang, J.1    Biedermann, K.A.2    Wolf, C.R.3    Brown, J.M.4
  • 26
    • 0025073825 scopus 로고
    • Reductive metabolism of 3-amino-1,2,4'benzotriazine-1,4-dioxide (SR 4233) and the induction of unscheduled DNA synthesis in rat and human derived cell lines
    • Cahill A and White INH, Reductive metabolism of 3-amino-1,2,4'benzotriazine-1,4-dioxide (SR 4233) and the induction of unscheduled DNA synthesis in rat and human derived cell lines. Carcinogenesis 11: 1407-1411, 1990.
    • (1990) Carcinogenesis , vol.11 , pp. 1407-1411
    • Cahill, A.1    White, I.N.H.2
  • 27
    • 0026802366 scopus 로고
    • Repair of DNA and chromosome breaks in cells exposed to SR 4233 under hypoxia or to ionizing radiation
    • Wang J, Biedermann KA and Brown JM, Repair of DNA and chromosome breaks in cells exposed to SR 4233 under hypoxia or to ionizing radiation. Cancer Res 52: 4473-4477, 1992.
    • (1992) Cancer Res , vol.52 , pp. 4473-4477
    • Wang, J.1    Biedermann, K.A.2    Brown, J.M.3
  • 29
    • 8244234465 scopus 로고    scopus 로고
    • Pharmacokinetics of the hypoxic cell cytotoxic agent tirapazamine and its major bioreductive metabolites in mice and humans: Retrospective analysis of a pharmacokinetically guided dose escalation strategy in a phase I trial
    • in press
    • Graham MA, Senan S, Robin H, Eckhardt N, Lendrem D, Hincks J, Greenslade D, Rampling R, Kaye SB, von Roemeling R and Workman P, Pharmacokinetics of the hypoxic cell cytotoxic agent tirapazamine and its major bioreductive metabolites in mice and humans: Retrospective analysis of a pharmacokinetically guided dose escalation strategy in a phase I trial. Cancer Chemother Pharmacol, in press.
    • Cancer Chemother Pharmacol
    • Graham, M.A.1    Senan, S.2    Robin, H.3    Eckhardt, N.4    Lendrem, D.5    Hincks, J.6    Greenslade, D.7    Rampling, R.8    Kaye, S.B.9    Von Roemeling, R.10    Workman, P.11
  • 30
    • 0021382389 scopus 로고
    • A thin-film culturing technique allowing rapid gas-liquid equilibration (6 sec) with no toxicity to mammalian cells
    • Koch C, A thin-film culturing technique allowing rapid gas-liquid equilibration (6 sec) with no toxicity to mammalian cells. Radiat Res 97: 434-442, 1984.
    • (1984) Radiat Res , vol.97 , pp. 434-442
    • Koch, C.1
  • 31
    • 0024402834 scopus 로고
    • An assay for superoxide dismutase in mammalian tissue homogenates
    • Spitz DR and Oberley LW, An assay for superoxide dismutase in mammalian tissue homogenates. Anal Biochem 179: 8-18, 1989.
    • (1989) Anal Biochem , vol.179 , pp. 8-18
    • Spitz, D.R.1    Oberley, L.W.2
  • 32
    • 0019424679 scopus 로고
    • Regional distribution of catalase in the adult brain
    • Brannan TS, Maker HS and Raes IP, Regional distribution of catalase in the adult brain. J Neurochem 36: 307-309, 1981.
    • (1981) J Neurochem , vol.36 , pp. 307-309
    • Brannan, T.S.1    Maker, H.S.2    Raes, I.P.3
  • 33
    • 0017067418 scopus 로고
    • Glutathione peroxidase activity in selenium-deficient rat liver
    • Lawrence RA and Burk RF, Glutathione peroxidase activity in selenium-deficient rat liver. Biochem Biophys Res Commun 71: 952-958, 1976.
    • (1976) Biochem Biophys Res Commun , vol.71 , pp. 952-958
    • Lawrence, R.A.1    Burk, R.F.2
  • 34
    • 0016634453 scopus 로고
    • Isolation and some characteristics of glutathione reductase from rabbit erythrocytes
    • Ray LE and Prescott JM, Isolation and some characteristics of glutathione reductase from rabbit erythrocytes. Proc Soc Exp Biol Med 148: 402-409, 1976.
    • (1976) Proc Soc Exp Biol Med , vol.148 , pp. 402-409
    • Ray, L.E.1    Prescott, J.M.2
  • 35
    • 0026589840 scopus 로고
    • Rapid detection of inducers of enzymes that protect against carcinogens
    • Prochaska HJ, Santamaria AB and Talalay P, Rapid detection of inducers of enzymes that protect against carcinogens. Proc Natl Acad Sci USA 89: 2394-2398, 1992.
    • (1992) Proc Natl Acad Sci USA , vol.89 , pp. 2394-2398
    • Prochaska, H.J.1    Santamaria, A.B.2    Talalay, P.3
  • 36
    • 0028867912 scopus 로고
    • Importance of P450 reductase activity in determining sensitivity of breast tumor cells to the bioreductive drug tirapazamine (SR 4233)
    • Patterson AV, Barham HM, Chinje EC, Adams GE, Harris AL and Stratford IJ, Importance of P450 reductase activity in determining sensitivity of breast tumor cells to the bioreductive drug tirapazamine (SR 4233). Br J Cancer 72:1144-1150, 1995.
    • (1995) Br J Cancer , vol.72 , pp. 1144-1150
    • Patterson, A.V.1    Barham, H.M.2    Chinje, E.C.3    Adams, G.E.4    Harris, A.L.5    Stratford, I.J.6
  • 37
    • 0025354323 scopus 로고
    • Alteration of endogenous glutathione peroxidase, manganese superoxide dismutase, and glutathione transferase activity in cells transfected with a copper-zinc superoxide dismutase expression vector. Explanation for variations in paraquat resistance
    • Kelner MJ and Bagnell R, Alteration of endogenous glutathione peroxidase, manganese superoxide dismutase, and glutathione transferase activity in cells transfected with a copper-zinc superoxide dismutase expression vector. Explanation for variations in paraquat resistance. J Biol Chem 265: 10872-10875, 1990.
    • (1990) J Biol Chem , vol.265 , pp. 10872-10875
    • Kelner, M.J.1    Bagnell, R.2
  • 38
    • 0025308187 scopus 로고
    • The effects of three bioreductive drugs (mitomycin C, RSU-1069 and SR4233) on cell lines selected for their sensitivity to mitomycin C or ionising radiation
    • Keohane A, Godden J, Stratford IJ and Adams GE, The effects of three bioreductive drugs (mitomycin C, RSU-1069 and SR4233) on cell lines selected for their sensitivity to mitomycin C or ionising radiation. Br J Cancer 61: 722-726, 1990.
    • (1990) Br J Cancer , vol.61 , pp. 722-726
    • Keohane, A.1    Godden, J.2    Stratford, I.J.3    Adams, G.E.4
  • 39
    • 0027248915 scopus 로고
    • Molecular mechanisms of SR 4233-induced hepatocyte toxicity under aerobic versus hypoxic conditions
    • Silva JM and O'Brien PJ, Molecular mechanisms of SR 4233-induced hepatocyte toxicity under aerobic versus hypoxic conditions. Br J Cancer 68: 484-491, 1993.
    • (1993) Br J Cancer , vol.68 , pp. 484-491
    • Silva, J.M.1    O'Brien, P.J.2
  • 41
    • 0028168183 scopus 로고
    • SR-4233 (Tirapazamine) acts as an uncoupler of oxidative phosphorylation in human MCF-7 breast carcinoma cells
    • Ara G, Coleman CN and Teicher BA, SR-4233 (Tirapazamine) acts as an uncoupler of oxidative phosphorylation in human MCF-7 breast carcinoma cells. Cancer Lett 85: 195-203, 1994.
    • (1994) Cancer Lett , vol.85 , pp. 195-203
    • Ara, G.1    Coleman, C.N.2    Teicher, B.A.3
  • 42
    • 0025893246 scopus 로고
    • The role of NAD(P)H: Quinone reductase (EC 1.6.99.2, DT-diaphorase) in the reductive bioactivation of the novel indoloquinone antitumor agent EO9
    • Walton MI, Smith PJ and Workman P, The role of NAD(P)H: Quinone reductase (EC 1.6.99.2, DT-diaphorase) in the reductive bioactivation of the novel indoloquinone antitumor agent EO9. Cancer Commun 3: 199-206, 1991.
    • (1991) Cancer Commun , vol.3 , pp. 199-206
    • Walton, M.I.1    Smith, P.J.2    Workman, P.3
  • 43
    • 0025688249 scopus 로고
    • Metabolism of mitomycin C by DT-diaphorase: Role in mitomycin C-induced DNA damage and cytotoxicity in human colon carcinoma cells
    • Siegel D, Gibson NW, Preusch PC and Ross D, Metabolism of mitomycin C by DT-diaphorase: Role in mitomycin C-induced DNA damage and cytotoxicity in human colon carcinoma cells. Cancer Res 50: 7483-7489, 1990.
    • (1990) Cancer Res , vol.50 , pp. 7483-7489
    • Siegel, D.1    Gibson, N.W.2    Preusch, P.C.3    Ross, D.4
  • 44
    • 0024205344 scopus 로고
    • The nitroreductase enzyme in Walker cells that activates 5-(aziridin-l-yl)-2,4-dinitrobenzamide (CB 1954) to 5-(aziridin-l-yl)-4-hydroxylamino-2-nitrobenzamide is a form of NAD(P)H dehydrogenase (quinone) (EC 1.6.99.2)
    • Knox RJ, Boland MP, Friedlos F, Coles B, Southan C and Roberts JJ, The nitroreductase enzyme in Walker cells that activates 5-(aziridin-l-yl)-2,4-dinitrobenzamide (CB 1954) to 5-(aziridin-l-yl)-4-hydroxylamino-2-nitrobenzamide is a form of NAD(P)H dehydrogenase (quinone) (EC 1.6.99.2). Bio chem Pharmacol 37: 4671-4677, 1988.
    • (1988) Bio Chem Pharmacol , vol.37 , pp. 4671-4677
    • Knox, R.J.1    Boland, M.P.2    Friedlos, F.3    Coles, B.4    Southan, C.5    Roberts, J.J.6
  • 45
    • 0026502752 scopus 로고
    • Enzymology of the reduction of the potent benzotriazine-di-N-oxide hypoxic cell cytotoxin SR 4233 (WIN 59075) by NAD(P)H: (quinone acceptor) oxidoreductase (EC 1.6.99.2) purified from Walker 256 rat tumour cells
    • Riley RJ and Workman P, Enzymology of the reduction of the potent benzotriazine-di-N-oxide hypoxic cell cytotoxin SR 4233 (WIN 59075) by NAD(P)H: (quinone acceptor) oxidoreductase (EC 1.6.99.2) purified from Walker 256 rat tumour cells. Biochem Pharmacol 43: 167-174, 1992.
    • (1992) Biochem Pharmacol , vol.43 , pp. 167-174
    • Riley, R.J.1    Workman, P.2
  • 46
    • 0023689603 scopus 로고
    • Metabolism of SR 4233 by Chinese hamster ovary cells: Basis of selective hypoxic cytotoxicity
    • Baker MA, Zeman EM, Hirst VK and Brown JM, Metabolism of SR 4233 by Chinese hamster ovary cells: Basis of selective hypoxic cytotoxicity. Cancer Res 48: 5947-5952, 1988.
    • (1988) Cancer Res , vol.48 , pp. 5947-5952
    • Baker, M.A.1    Zeman, E.M.2    Hirst, V.K.3    Brown, J.M.4
  • 48
    • 0028097816 scopus 로고
    • Unusually marked hypoxic sensitization to indoloquinone EO9 and mitomycin c in a human colon-tumour cell line that lacks DT-diaphorase activity
    • Plumb JA and Workman P, Unusually marked hypoxic sensitization to indoloquinone EO9 and mitomycin C in a human colon-tumour cell line that lacks DT-diaphorase activity. Int J Cancer 56: 134-139, 1994.
    • (1994) Int J Cancer , vol.56 , pp. 134-139
    • Plumb, J.A.1    Workman, P.2
  • 49
    • 0000177348 scopus 로고
    • Sensitivity to tirapazamine (SR 4233) is determined by P450 reductase activity in human breast but not lung cancer cell lines
    • Barham HM, Patterson A, Chinje EC, Harris AL and Stratford IJ, Sensitivity to tirapazamine (SR 4233) is determined by P450 reductase activity in human breast but not lung cancer cell lines. Br J Cancer 71(Suppl. XXIV): 20, 1995.
    • (1995) Br J Cancer , vol.71 , Issue.SUPPL. XXIV , pp. 20
    • Barham, H.M.1    Patterson, A.2    Chinje, E.C.3    Harris, A.L.4    Stratford, I.J.5
  • 50
    • 0028063368 scopus 로고
    • DT-diaphorase protects cells from the hypoxic cytotoxicity of the indoloquinone EO9
    • Plumb JA, Gerritsen M and Workman P, DT-diaphorase protects cells from the hypoxic cytotoxicity of the indoloquinone EO9. Br J Cancer 70: 1136-1143, 1994.
    • (1994) Br J Cancer , vol.70 , pp. 1136-1143
    • Plumb, J.A.1    Gerritsen, M.2    Workman, P.3
  • 51
    • 0030009223 scopus 로고    scopus 로고
    • Tirapazamine-induced DNA damage measured using the comet assay correlates with cytotoxicity towards hypoxic tumour cells in fitro
    • Siim BG, van Zijl PL and Brown JM, Tirapazamine-induced DNA damage measured using the comet assay correlates with cytotoxicity towards hypoxic tumour cells in fitro. Br J Cancer 73: 952-960, 1996.
    • (1996) Br J Cancer , vol.73 , pp. 952-960
    • Siim, B.G.1    Van Zijl, P.L.2    Brown, J.M.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.