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Volumn 59, Issue , 2013, Pages 554-563

Molecular mechanisms involved in the protective effect of selenocystine against methylmercury-induced cell death in human HepG2 cells

Author keywords

Antioxidant and detoxificant defences; Cell death; HepG2 cells; Methylmercury; Selenocystine

Indexed keywords

ANTIOXIDANT; CASPASE 3; GLUTATHIONE; GLUTATHIONE REDUCTASE; LACTATE DEHYDROGENASE; MITOGEN ACTIVATED PROTEIN KINASE P38; ORGANOSELENIUM DERIVATIVE; PROTEIN BCL 2; REACTIVE OXYGEN METABOLITE; SE METHYLSELENOCYSTEINE; SELENIUM METHIONINE; SELENOCYSTINE; STRESS ACTIVATED PROTEIN KINASE; UNCLASSIFIED DRUG;

EID: 84881017025     PISSN: 02786915     EISSN: 18736351     Source Type: Journal    
DOI: 10.1016/j.fct.2013.06.057     Document Type: Article
Times cited : (22)

References (49)
  • 1
    • 33646512855 scopus 로고    scopus 로고
    • Quercetin protects human hepatoma cell line (HepG2) against oxidative stress induced by tert-butyl hydroperoxide
    • Alía M., Ramos S., Mateos R., Granado-Serrano A., Bravo L., Goya L. Quercetin protects human hepatoma cell line (HepG2) against oxidative stress induced by tert-butyl hydroperoxide. Toxicol. Appl. Pharmacol. 2006, 212:110-118.
    • (2006) Toxicol. Appl. Pharmacol. , vol.212 , pp. 110-118
    • Alía, M.1    Ramos, S.2    Mateos, R.3    Granado-Serrano, A.4    Bravo, L.5    Goya, L.6
  • 2
    • 0027261529 scopus 로고
    • The mechanism of methyl mercury toxicity in isolated rat hepatocytes
    • Ashour H., Abdel-Rahman M., Khodair A. The mechanism of methyl mercury toxicity in isolated rat hepatocytes. Toxicol. Lett. 1993, 69:87-96.
    • (1993) Toxicol. Lett. , vol.69 , pp. 87-96
    • Ashour, H.1    Abdel-Rahman, M.2    Khodair, A.3
  • 3
    • 33745683902 scopus 로고    scopus 로고
    • Effects of selenocystine on lead-exposed Chinese hamster ovary (CHO) and PC-12 cells
    • Aykin-Burns N., Ercal N. Effects of selenocystine on lead-exposed Chinese hamster ovary (CHO) and PC-12 cells. Toxicol. Appl. Pharmacol. 2006, 214:136-143.
    • (2006) Toxicol. Appl. Pharmacol. , vol.214 , pp. 136-143
    • Aykin-Burns, N.1    Ercal, N.2
  • 4
    • 0035137726 scopus 로고    scopus 로고
    • Allium chemistry: synthesis, natural occurrence, biological activity, and chemistry of Se-alk(en)ylselenocysteines and their gamma-glutamyl derivatives and oxidation products
    • Block E., Birringer M., Jiang W.Q., Nakahodo T., Thompson H.J., Toscano P.J., Uzar H., Zhang X., Zhu Z.J. Allium chemistry: synthesis, natural occurrence, biological activity, and chemistry of Se-alk(en)ylselenocysteines and their gamma-glutamyl derivatives and oxidation products. J. Agric. Food Chem. 2001, 49:458-470.
    • (2001) J. Agric. Food Chem. , vol.49 , pp. 458-470
    • Block, E.1    Birringer, M.2    Jiang, W.Q.3    Nakahodo, T.4    Thompson, H.J.5    Toscano, P.J.6    Uzar, H.7    Zhang, X.8    Zhu, Z.J.9
  • 5
    • 0042855939 scopus 로고    scopus 로고
    • Ligand-independent tyrosine kinase signalling in RTH 149 trout hepatoma cells: comparison among heavy metals and pro-oxidants
    • Burlando B., Magnelli V., Panfoli I., Berti E., Viarengo A. Ligand-independent tyrosine kinase signalling in RTH 149 trout hepatoma cells: comparison among heavy metals and pro-oxidants. Cell. Physiol. Biochem. 2003, 13:147-154.
    • (2003) Cell. Physiol. Biochem. , vol.13 , pp. 147-154
    • Burlando, B.1    Magnelli, V.2    Panfoli, I.3    Berti, E.4    Viarengo, A.5
  • 7
    • 36649023534 scopus 로고    scopus 로고
    • Selenium methylselenocysteine protects human hepatoma HepG2 cells against oxidative stress induced by tert-butylhydroperoxide
    • Cuello S., Ramos S., Mateos R., Martín M.A., Madrid Y., Cámara C., Bravo L., Goya L. Selenium methylselenocysteine protects human hepatoma HepG2 cells against oxidative stress induced by tert-butylhydroperoxide. Anal. Bioanal. Chem. 2007, 389:2167-2178.
    • (2007) Anal. Bioanal. Chem. , vol.389 , pp. 2167-2178
    • Cuello, S.1    Ramos, S.2    Mateos, R.3    Martín, M.A.4    Madrid, Y.5    Cámara, C.6    Bravo, L.7    Goya, L.8
  • 9
    • 0037910211 scopus 로고    scopus 로고
    • The future of GI and liver research: editorial perspectives III. JNK/AP-1 regulation of hepatocyte death
    • Czaja M. The future of GI and liver research: editorial perspectives III. JNK/AP-1 regulation of hepatocyte death. Am. J. Physiol. Gastrointest. Liver Physiol. 2003, 284:G875-G879.
    • (2003) Am. J. Physiol. Gastrointest. Liver Physiol. , vol.284
    • Czaja, M.1
  • 14
    • 33751082422 scopus 로고    scopus 로고
    • Quercetin induces apoptosis via caspase activation, regulation of Bcl-2, and inhibition of PI-3-Kinase/Akt and ERK pathways in a human hepatoma cell line (HepG2)
    • Granado-Serrano A., Martín M., Bravo L., Goya L., Ramos S. Quercetin induces apoptosis via caspase activation, regulation of Bcl-2, and inhibition of PI-3-Kinase/Akt and ERK pathways in a human hepatoma cell line (HepG2). J. Nutr. 2006, 136:2715-2721.
    • (2006) J. Nutr. , vol.136 , pp. 2715-2721
    • Granado-Serrano, A.1    Martín, M.2    Bravo, L.3    Goya, L.4    Ramos, S.5
  • 15
    • 33947606180 scopus 로고    scopus 로고
    • Molecular mechanisms of (-)-epicatechin and chlorogenic acid on the regulation of the apoptotic and survival/proliferation pathways in a human hepatoma cell line
    • Granado-Serrano A., Martin M., Izquierdo-Pulido M., Goya L., Bravo L., Ramos S. Molecular mechanisms of (-)-epicatechin and chlorogenic acid on the regulation of the apoptotic and survival/proliferation pathways in a human hepatoma cell line. J. Agric. Food Chem. 2007, 55:2020-2027.
    • (2007) J. Agric. Food Chem. , vol.55 , pp. 2020-2027
    • Granado-Serrano, A.1    Martin, M.2    Izquierdo-Pulido, M.3    Goya, L.4    Bravo, L.5    Ramos, S.6
  • 16
    • 67349181031 scopus 로고    scopus 로고
    • The role of MAPK in the biphasic dose-response phenomenon induced by cadmium and mercury in HEK293 cells
    • Hao C., Hao W., Wei X., Xing L., Jiang J., Shang L. The role of MAPK in the biphasic dose-response phenomenon induced by cadmium and mercury in HEK293 cells. Toxicol. In Vitro 2009, 23:660-666.
    • (2009) Toxicol. In Vitro , vol.23 , pp. 660-666
    • Hao, C.1    Hao, W.2    Wei, X.3    Xing, L.4    Jiang, J.5    Shang, L.6
  • 17
    • 0017064979 scopus 로고
    • A fluorometric method for determination of oxidised and reduced glutathione in tissues
    • Hissin P., Hilf R. A fluorometric method for determination of oxidised and reduced glutathione in tissues. Anal. Biochem. 1976, 74:214-226.
    • (1976) Anal. Biochem. , vol.74 , pp. 214-226
    • Hissin, P.1    Hilf, R.2
  • 18
    • 79957525768 scopus 로고    scopus 로고
    • Comparison of different selenocompounds with respect to nutritional value vs. toxicity using liver cells in culture
    • Hoefig C.S., Renko K., Köhrle J., Birringer M., Schomburg L. Comparison of different selenocompounds with respect to nutritional value vs. toxicity using liver cells in culture. J. Nutr. Biochem. 2011, 22:945-955.
    • (2011) J. Nutr. Biochem. , vol.22 , pp. 945-955
    • Hoefig, C.S.1    Renko, K.2    Köhrle, J.3    Birringer, M.4    Schomburg, L.5
  • 19
    • 33746875510 scopus 로고    scopus 로고
    • Recent advances in evaluation of health effects on mercury with special reference to methylmercury: a minireview
    • Honda S., Hylander L., Sakamoto M. Recent advances in evaluation of health effects on mercury with special reference to methylmercury: a minireview. EHPM 2006, 11:171-176.
    • (2006) EHPM , vol.11 , pp. 171-176
    • Honda, S.1    Hylander, L.2    Sakamoto, M.3
  • 20
    • 0033000105 scopus 로고    scopus 로고
    • Accumulation of mercury and its effect on antioxidant enzymes in brain, liver, and kidneys of mice
    • Hussain S., Atkinson A., Thompson S.J., Khan A.T. Accumulation of mercury and its effect on antioxidant enzymes in brain, liver, and kidneys of mice. J. Environ. Sci. Health B 1999, 34:645-660.
    • (1999) J. Environ. Sci. Health B , vol.34 , pp. 645-660
    • Hussain, S.1    Atkinson, A.2    Thompson, S.J.3    Khan, A.T.4
  • 21
    • 33748952143 scopus 로고    scopus 로고
    • Free radicals and antioxidant status in rat liver after dietary exposure of environmental mercury
    • Ji X., Wang W., Cheng J., Yuan T., Zhao X., Zhang H., Qu L. Free radicals and antioxidant status in rat liver after dietary exposure of environmental mercury. Environ. Toxicol. Pharmacol. 2005, 22:309-314.
    • (2005) Environ. Toxicol. Pharmacol. , vol.22 , pp. 309-314
    • Ji, X.1    Wang, W.2    Cheng, J.3    Yuan, T.4    Zhao, X.5    Zhang, H.6    Qu, L.7
  • 22
    • 81755184018 scopus 로고    scopus 로고
    • Combined effect of N-acetyl cysteine, zinc, and selenium against chronic dimethylmercury-induced oxidative stress: a biochemical and histopathological approach
    • Joshi D., Mittal D., Shrivastav S., Shukla S., Srivastav A.K. Combined effect of N-acetyl cysteine, zinc, and selenium against chronic dimethylmercury-induced oxidative stress: a biochemical and histopathological approach. Arch. Environ. Contam. Toxicol. 2011, 61:558-567.
    • (2011) Arch. Environ. Contam. Toxicol. , vol.61 , pp. 558-567
    • Joshi, D.1    Mittal, D.2    Shrivastav, S.3    Shukla, S.4    Srivastav, A.K.5
  • 23
    • 84857652697 scopus 로고    scopus 로고
    • Therapeutic potential of N-acetyl cysteine with antioxidants (Zn and Se) supplementation against dimethylmercury toxicity in male albino rats
    • Joshi D., Mittal D.K., Shukla S., Srivastav A.K. Therapeutic potential of N-acetyl cysteine with antioxidants (Zn and Se) supplementation against dimethylmercury toxicity in male albino rats. Exp. Toxicol. Pathol. 2012, 64:103-108.
    • (2012) Exp. Toxicol. Pathol. , vol.64 , pp. 103-108
    • Joshi, D.1    Mittal, D.K.2    Shukla, S.3    Srivastav, A.K.4
  • 24
    • 84874470858 scopus 로고    scopus 로고
    • Mercuric chloride-induced testicular toxicity in rats and the protective role of sodium selenite and vitamin E
    • Kalender S., Uzun F.G., Demir F., Uzunhisarcikli M., Aslanturk A. Mercuric chloride-induced testicular toxicity in rats and the protective role of sodium selenite and vitamin E. Food Chem. Toxicol. 2013, 55:456-462.
    • (2013) Food Chem. Toxicol. , vol.55 , pp. 456-462
    • Kalender, S.1    Uzun, F.G.2    Demir, F.3    Uzunhisarcikli, M.4    Aslanturk, A.5
  • 25
    • 33846249322 scopus 로고    scopus 로고
    • Role of glutathione in determining the differential sensitivity between the cortical and cerebellar regions towards mercury-induced oxidative stress
    • Kaur P., Aschner M., Syversen T. Role of glutathione in determining the differential sensitivity between the cortical and cerebellar regions towards mercury-induced oxidative stress. Toxicology 2007, 230:164-177.
    • (2007) Toxicology , vol.230 , pp. 164-177
    • Kaur, P.1    Aschner, M.2    Syversen, T.3
  • 27
    • 0016651634 scopus 로고
    • Correlation between selenium and mercury in man following exposure to inorganic mercury
    • Kosta L., Byrne A.R., Zelenko V. Correlation between selenium and mercury in man following exposure to inorganic mercury. Nature 1975, 254:238-239.
    • (1975) Nature , vol.254 , pp. 238-239
    • Kosta, L.1    Byrne, A.R.2    Zelenko, V.3
  • 28
    • 79954609831 scopus 로고    scopus 로고
    • Anti-hemolytic and peroxyl radical scavenging activity of organoselenium compounds: an in vitro study
    • Kumar B.S., Kunwar A., Singh B.G., Ahmad A., Priyadarsini K.I. Anti-hemolytic and peroxyl radical scavenging activity of organoselenium compounds: an in vitro study. Biol. Trace Elem. Res. 2011, 140:127-138.
    • (2011) Biol. Trace Elem. Res. , vol.140 , pp. 127-138
    • Kumar, B.S.1    Kunwar, A.2    Singh, B.G.3    Ahmad, A.4    Priyadarsini, K.I.5
  • 30
    • 84870044559 scopus 로고    scopus 로고
    • Organic Selenium supplementation increases mercury excretion and decreases oxidative damage in long-term mercury-exposed residents from Wanshan, China
    • Li Y.-F., Dong Z., Chen C., Li B., Gao Y., Qu L., Wang T., Fu X., Zhao Y., Chai Z. Organic Selenium supplementation increases mercury excretion and decreases oxidative damage in long-term mercury-exposed residents from Wanshan, China. Environ. Sci. Technol. 2012, 46:11313-11318.
    • (2012) Environ. Sci. Technol. , vol.46 , pp. 11313-11318
    • Li, Y.-F.1    Dong, Z.2    Chen, C.3    Li, B.4    Gao, Y.5    Qu, L.6    Wang, T.7    Fu, X.8    Zhao, Y.9    Chai, Z.10
  • 31
    • 0030893979 scopus 로고    scopus 로고
    • Serum selenium, plasma glutathione (GSH) and erythrocyte glutathione peroxidase (GSH-Px)-levels in asymptomatic versus symptomatic human immunodeficiency virus-1 (HIV-1)-infection
    • Look M.P., Rockstroh J.K., Rao G.S., Kreuzer K.A., Barton S., Lemoch H., Sudhop T., Hoch J., Stockinger K., Spengler U., Sauerbruch T. Serum selenium, plasma glutathione (GSH) and erythrocyte glutathione peroxidase (GSH-Px)-levels in asymptomatic versus symptomatic human immunodeficiency virus-1 (HIV-1)-infection. Eur. J. Clin. Nutr. 1997, 51:266-272.
    • (1997) Eur. J. Clin. Nutr. , vol.51 , pp. 266-272
    • Look, M.P.1    Rockstroh, J.K.2    Rao, G.S.3    Kreuzer, K.A.4    Barton, S.5    Lemoch, H.6    Sudhop, T.7    Hoch, J.8    Stockinger, K.9    Spengler, U.10    Sauerbruch, T.11
  • 33
    • 84983719244 scopus 로고    scopus 로고
    • Inhibitory effect of ebselen on lactate dehydrogenase activity from mammals: a comparative study with diphenyl diselenide and diphenyl ditelluride
    • Lugokenski T.H., Müller L.G., Taube P.S., Rocha J.B.T., Pereira M.E. Inhibitory effect of ebselen on lactate dehydrogenase activity from mammals: a comparative study with diphenyl diselenide and diphenyl ditelluride. Drug Chem. Toxicol. 2011, 34:66-76.
    • (2011) Drug Chem. Toxicol. , vol.34 , pp. 66-76
    • Lugokenski, T.H.1    Müller, L.G.2    Taube, P.S.3    Rocha, J.B.T.4    Pereira, M.E.5
  • 34
    • 4444324090 scopus 로고    scopus 로고
    • Apoptosis and disease: a life or death decision
    • MacFarlane M., Williams A.C. Apoptosis and disease: a life or death decision. EMBO Rep. 2004, 5:674-678.
    • (2004) EMBO Rep. , vol.5 , pp. 674-678
    • MacFarlane, M.1    Williams, A.C.2
  • 35
    • 46449116236 scopus 로고    scopus 로고
    • Pulse radiolysis studies on reactions of hydroxyl radicals with selenocystine derivatives
    • Mishra B., Kumbhare L.B., Jain V.K., Priyadarsini K.I. Pulse radiolysis studies on reactions of hydroxyl radicals with selenocystine derivatives. J. Phys. Chem. B 2008, 112:4441-4446.
    • (2008) J. Phys. Chem. B , vol.112 , pp. 4441-4446
    • Mishra, B.1    Kumbhare, L.B.2    Jain, V.K.3    Priyadarsini, K.I.4
  • 36
    • 35748959328 scopus 로고    scopus 로고
    • Comparative study of activities in reactive oxygen species production/defense system in mitochondria of rat brain and liver, and their susceptibility to methylmercury toxicity
    • Mori N., Yasutake A., Hirayama K. Comparative study of activities in reactive oxygen species production/defense system in mitochondria of rat brain and liver, and their susceptibility to methylmercury toxicity. Arch. Toxicol. 2007, 81:769-776.
    • (2007) Arch. Toxicol. , vol.81 , pp. 769-776
    • Mori, N.1    Yasutake, A.2    Hirayama, K.3
  • 37
    • 0034213138 scopus 로고    scopus 로고
    • P38 MAP kinases: beyond the stress response
    • Nebreda A.R., Porras A. P38 MAP kinases: beyond the stress response. TIBS 2000, 25:257-260.
    • (2000) TIBS , vol.25 , pp. 257-260
    • Nebreda, A.R.1    Porras, A.2
  • 38
    • 0036185848 scopus 로고    scopus 로고
    • The protein kinase B/Akt signalling pathway in human malignancy
    • Nicholson K., Anderson N. The protein kinase B/Akt signalling pathway in human malignancy. Cell. Signal. 2002, 14:381-395.
    • (2002) Cell. Signal. , vol.14 , pp. 381-395
    • Nicholson, K.1    Anderson, N.2
  • 39
    • 84984580672 scopus 로고    scopus 로고
    • Toxicology and pharmacology of selenium: emphasis on synthetic organoselenium compounds
    • Nogueira C.W., Rocha J.B.T. Toxicology and pharmacology of selenium: emphasis on synthetic organoselenium compounds. Arch. Toxicol. 2011, 85:1313-1359.
    • (2011) Arch. Toxicol. , vol.85 , pp. 1313-1359
    • Nogueira, C.W.1    Rocha, J.B.T.2
  • 40
    • 84855222322 scopus 로고    scopus 로고
    • Comparative study on the efficacy of Allium sativum (garlic) in reducing some heavy metal accumulation in liver of wistar rats
    • Nwokocha C.R., Owua D.U., Nwokocha M.I., Ufearo C.S., Iwuala M.O.E. Comparative study on the efficacy of Allium sativum (garlic) in reducing some heavy metal accumulation in liver of wistar rats. Food Chem. Toxicol. 2012, 50:222-226.
    • (2012) Food Chem. Toxicol. , vol.50 , pp. 222-226
    • Nwokocha, C.R.1    Owua, D.U.2    Nwokocha, M.I.3    Ufearo, C.S.4    Iwuala, M.O.E.5
  • 42
    • 77956173980 scopus 로고    scopus 로고
    • Human neuroblastoma cells transfected with tyrosine hydroxylase gain increased resistance to methylmercury-induced cell death
    • Posser T., Dunkley P.R., Dickson P.W., Franco J.L. Human neuroblastoma cells transfected with tyrosine hydroxylase gain increased resistance to methylmercury-induced cell death. Toxicol. In Vitro 2010, 24:1498-1503.
    • (2010) Toxicol. In Vitro , vol.24 , pp. 1498-1503
    • Posser, T.1    Dunkley, P.R.2    Dickson, P.W.3    Franco, J.L.4
  • 43
    • 0036019945 scopus 로고    scopus 로고
    • Mercury-induced apoptosis in human lymphocytes: caspase activation is linked to redox status
    • Shenker B.J., Pankoski L., Zekavat A., Shapiro I.M. Mercury-induced apoptosis in human lymphocytes: caspase activation is linked to redox status. Antiox. Redox Signaling. 2002, 4:379-389.
    • (2002) Antiox. Redox Signaling. , vol.4 , pp. 379-389
    • Shenker, B.J.1    Pankoski, L.2    Zekavat, A.3    Shapiro, I.M.4
  • 44
    • 34249789027 scopus 로고    scopus 로고
    • Regulation of hepatocyte apoptosis by oxidative stress
    • Singh R., Czaja M.J. Regulation of hepatocyte apoptosis by oxidative stress. Gastroenterol. Hepatol. 2007, 1:S45-S48.
    • (2007) Gastroenterol. Hepatol. , vol.1
    • Singh, R.1    Czaja, M.J.2
  • 45
    • 70350211428 scopus 로고    scopus 로고
    • Schisandrin B stimulates a cytoprotective response in rat liver exposed to mercuric chloride
    • Stacchiotti A., Volti G.L., Lavazza A., Rezzani R., Rodella L.F. Schisandrin B stimulates a cytoprotective response in rat liver exposed to mercuric chloride. Food Chem. Toxicol. 2009, 47:2834-2840.
    • (2009) Food Chem. Toxicol. , vol.47 , pp. 2834-2840
    • Stacchiotti, A.1    Volti, G.L.2    Lavazza, A.3    Rezzani, R.4    Rodella, L.F.5
  • 46
    • 0038719775 scopus 로고    scopus 로고
    • The antioxidant role of selenium and seleno-compounds
    • Tapiero H., Townsend D.M., Tew K.D. The antioxidant role of selenium and seleno-compounds. Biomed. Pharmacother. 2003, 57:134-144.
    • (2003) Biomed. Pharmacother. , vol.57 , pp. 134-144
    • Tapiero, H.1    Townsend, D.M.2    Tew, K.D.3
  • 47
    • 80051795159 scopus 로고    scopus 로고
    • Hepatoprotective, immunomodulatory, and anti-inflammatory activities of selenocystine in experimental liver injury of rats
    • Uzma N., Santhosh-Kumar B., Priyadarsini K.I. Hepatoprotective, immunomodulatory, and anti-inflammatory activities of selenocystine in experimental liver injury of rats. Biol. Trace Elem. Res. 2011, 142:723-734.
    • (2011) Biol. Trace Elem. Res. , vol.142 , pp. 723-734
    • Uzma, N.1    Santhosh-Kumar, B.2    Priyadarsini, K.I.3
  • 48
    • 77952095856 scopus 로고    scopus 로고
    • In vitro evaluation of selenium genotoxic, cytotoxic, and protective effects: a review
    • Valdiglesias V., Pasaro E., Mendez J., Laffon B. In vitro evaluation of selenium genotoxic, cytotoxic, and protective effects: a review. Arch. Toxicol. 2010, 84:337-351.
    • (2010) Arch. Toxicol. , vol.84 , pp. 337-351
    • Valdiglesias, V.1    Pasaro, E.2    Mendez, J.3    Laffon, B.4
  • 49
    • 67649208814 scopus 로고    scopus 로고
    • Characterization of antioxidant protection of cultured neural progenitor cells (NPC) against methylmercury (MeHg) toxicity
    • Watanabe J., Nakamachi T., Ogawa T., Naganuma A., Nakamura M., Shioda S., Nakajo S. Characterization of antioxidant protection of cultured neural progenitor cells (NPC) against methylmercury (MeHg) toxicity. J. Toxicol. Sci. 2009, 34:315-325.
    • (2009) J. Toxicol. Sci. , vol.34 , pp. 315-325
    • Watanabe, J.1    Nakamachi, T.2    Ogawa, T.3    Naganuma, A.4    Nakamura, M.5    Shioda, S.6    Nakajo, S.7


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