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°èÀμ÷, Àü¿µ¼ö, ¼ºµµÀ¯, À̼÷Èñ, ±èÁ¾, Yokozawa Takako, Á¤ÇØ¿µ, ÀÌ°æÈñ,
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°èÀμ÷ ( Kye In-Sook ) 
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Àü¿µ¼ö ( Jeon Young-Soo ) 
ºÎ»ê´ëÇб³ ½ÄÇ°¿µ¾çÇаú
¼ºµµÀ¯ ( Soung Do-Yu ) 
ºÎ»ê´ëÇб³ ½ÄÇ°¿µ¾çÇаú
À̼÷Èñ ( Lee Sook-Hee ) 
ºÎ»ê´ëÇб³ ½ÄÇ°¿µ¾çÇаú
±èÁ¾ ( Kim Jong ) 
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 ( Yokozawa Takako ) 
ÀϺ» µµ¾ß¸¶ÀǾà´ë È­ÇÑ¾à ¿¬±¸¼Ò
Á¤ÇØ¿µ ( Chung Hae-Young ) 
ºÎ»ê´ëÇб³ ¾àÇдëÇÐ
ÀÌ°æÈñ ( Lee Kyung-Hee ) 
ºÎ»ê´ëÇб³ ¾àÇдëÇÐ

Abstract

»ýü³»¿¡¼­ ¼¼Æ÷´Â ²÷ÀÓ¾øÀÌ È°¼º»ê¼Ò¸¦ »ý»êÇϸç À̵éÀº ¸Å¿ì ³ôÀº ¹ÝÀÀ¼ºÀ» °¡Áö¹Ç·Î »ýü³»¿¡¼­ ´Ù¾çÇÑ ºÐÀÚµé°ú ½Ä°Ô ¹ÝÀÀÇÏ¿© ¼Õ»óÀ» °¡Á®¿Í ÁöÁú °ú»êÈ­ ¹× »êÈ­Àû »óŸ¦ ÃÊ·¡ÇϹǷΠ¿°Áõ, ³ëÈ­, ¹ß¾Ï µî¸¸Àº ÁúȯÀÇ º´ÀÎÀ¸·Î ÃßÃøµÇ°í ÀÖÀ¸¸ç, ±Ù·¡¿¡´Â NO¡¤¿Í O2ÀÇ ¹ÝÀÀ¿¡ ÀÇÇØ »ý¼ºµÈ °­·ÂÇÑ »êÈ­Á¦ÀÎ peroxynitrite (ONOO-)°¡ ÁöÁú °ú»êÈ­, ¼¼Æ÷³» -SHÀÇ »êÈ­, DNA¼Õ»ó°ú ¼¼Æ÷ ¿¡³ÊÁö °í°¥ µî¸¸Àº ¸¸¼º Áúȯ º´¸®Çаú °ü·ÃÇÏ¿© È°¹ßÈ÷ ¿¬±¸µÇ°í ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â ¼¼Æ÷ ¹è ¾ç°è¿¡¼­ ECC, GCG ¹× EGCGÀÇ ¼¼°¡Áö ¼ººÐ¿¡ ´ëÇØ SIN-1, AMVN, SNP, H2O2 ¶Ç´Â t-BHPÀÇ ¼¼Æ÷ µ¶ÀÛ¿ë¿¡ ´ëÇÑ ¿µÇâÀ» »ìÆì º» °á°ú SNP¸¦ Á¦¿ÜÇÑ ¾à¹°¿¡ À־ ECG, GCG ¹× EGCG´Â ³óµµÀÇÁ¸ÀûÀ¸·Î À¯ÀÇÇÑ ¼¼Æ÷ º¸È£ÀÛ¿ëÀ» ³ªÅ¸³»¾ú´Ù. Áï ³ìÂ÷¼ººÐ Áß¿¡¼­ ECG, GCG ¹× EGCCÀÇ ¼¼°¡Áö ¼ººÐÀº SNP¿¡ ÀÇÇØ »ý¼ºµÇ´Â NO¡¤ÀÇ ÀúÇØÈ¿°ú´Â ³ªÅ¸³ªÁö ¾Ê¾ÒÀ¸³ª, SIN-1¿¡ ÀÇÇØ Çü¼ºµÇ´Â ONOO-, AMVN¿¡ ÀÇÇÑ À¯¸®±â, t-BHP¿¡ ÀÇÇÑ LOOH ¹× H2O2¿¡ ÀÇÇÑ ¼¼Æ÷ ¼Õ»ó¿¡ ´ëÇؼ­´Â ¼¼Æ÷ º¸È£ÀÛ¿ëÀ» ³ªÅ¸³»¾ú´Ù. µû¶ó¼­ ÀÌµé ¼¼°¡Áö ¼ººÐµéÀº SIN-1¿¡ ÀÇÇØ Çü¼ºµÇ´Â NO¡¤º¸´Ù´Â O2ÀÇ Á¦°Å¸¦ ÅëÇؼ­, ¶ÇÇÑ t-BHP, H2O2, ONOO-ÀÇ peroxideµéÀ» Á÷Á¢ Á¦°ÅÇÔÀ¸·Î½á ¼¼Æ÷ º¸È£ÀÛ¿ëÀ» ³ªÅ¸³»´Â °ÍÀ¸·Î »ç·áµÈ´Ù.

Oxygen is essential for human life, yet it is dangerous to all aerobic organisms. This is because some oxygen is metabolized to oxygen-derived free radicals and other free radical species which, in excess, can cause the cell injury and be opposed by antioxidant defence systems. Nitric oxide (NO¡¤) is blown to the oxidant injury via production of the potent oxidant peroxynitrite (ONOO-). In this study, 3-morpholinosydnonimine (SIN-1), 2,2¡¯-azobis[2,4- dimethylvaleronitrile) (AMVN), sodium nitroprusside (SNP), H2O2 and tert-butyl hydroperoxide (t-BHP) which can produce intracellular free radicals, the cause of tissue damage and lipid peroxidation, were used for elucidating cytoprotective mechanisms of (-)-epicatechin 3-O-gallate (ECG), (-)-gallocatechin 3-O-gallate (GCG), and (-)- epigallocatechin 3-O-gallate (EGCG) extracted from green tea against free radicals. The treatment with ECG, GCG and EGCG markedly reduced cell damage induced by SIN-1, AMVN, H2O2and t-BHP in cultured AcF2 liver cells. On the other hand, in case of SNP, cell viability was not dependent on the concentration and kinds of green tea polyphenols. Therefore, we can postulate that green tea polyphenols inhibit peroxynitrite formation through their OB- scavenging as well as direct peroxynitrite scavenging.

Å°¿öµå

(-)-Epicatechin 3-O-gallate (ECG); (-)-Gallocatechin 3-O-gallate (GCG); (-)-Epigallocatechin 3-O-gallate (EGCG); Green tea polyphenols; Cytoprotective mechanism

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