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Cisplatin¿¡ ÀÇÇØ ½Åµ¶¼ºÀÌ À¯¹ßµÈ ¹é¼­¿¡¼­ iNOSÀÇ ¹ßÇö ¹× iNOS¾ïÁ¦Á¦ÀÇ È¿°ú The Expressions of iNOS and the Effects of iNOS Inhibitor in the Rats of Cisplatin Induced Nephrotoxicity

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Abstract

°á·Ð
½Åµ¶¼ºÀÇ À¯¹ßÀº º¹°­³» cisplatin Åõ¿© ÈÄ ½Ã°£ °æ°ú¿¡ µû¶ó Ç÷Áß BUN/creatinine°ú ½ÅÀå
´ÜÀ§¹«°Ô°¡ Áõ°¡µÊÀ» ÅëÇØ ¾Ë ¼ö ÀÖ¾úÀ¸¸ç, Çö¹Ì°æÀû °üÂûÀ» ÅëÇØ º¹°­³» cisplatinÅõ¿© ÈÄ
24½Ã°£ °æ°ú±ººÎÅÍ ½ÅÀåÀÇ Á¶Á÷ÇÐÀû º¯È­°¡ ³ªÅ¸³ª±â ½ÃÀÛÇÏ¿© ½Ã°£°æ°ú¿¡ µû¶ó ¼Õ»óÁ¤µµ°¡
½ÉÇØÁö´Â °ÍÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù. ¶ÇÇÑ ½Åµ¶¼ºÀÌ À¯¹ßµÈ ½ÅÀå¿¡¼­ÀÇ iNOS¹ßÇöÀº Western
blotting°ú RT-PCR ¹æ¹ýÀ» ÅëÇØ º¹°­³» cisplatinÅõ¿© ÈÄ 24½Ã°£ºÎÅÍ 72½Ã°£ °æ°ú±º »çÀÌ¿¡
°­ÇÏ°Ô ¹ßÇöµÊÀÌ È®ÀεǾú´Ù. iNOS¾ïÁ¦Á¦ Åõ¿©¿¡ µû¸¥ °á°ú·Î ½ÇÇ豺Áß 12½Ã°£, 24½Ã°£ ¹×
48½Ã°£ °æ°ú±º¿¡¼­ Ç÷Áß BUN/creatinineÀÌ ÀǹÌÀÖ°Ô(p<0.05) °¨¼ÒÇÏ´Â °æÇâÀ» º¸¿´À¸¸ç
RT-PCR°á°ú 6½Ã°£, 12½Ã°£ ¹× 72½Ã°£ °æ°ú±º¿¡¼­ iNOS mRNAÀÇ ¹ßÇöÀÌ »ó´ëÀûÀ¸·Î °¨¼Ò
ÇÏ´Â °æÇâÀ» ³ªÅ¸³Â´Ù.
ÀÌ»óÀÇ °á°ú¸¦ ÅëÇØ cisplatin¿¡ ÀÇÇØ À¯¹ßµÈ ½Å¼Õ»ó °úÁ¤¿¡¼­ iNOS°¡ ¹ßÇöµÊÀ» È®ÀÎÇÒ
¼ö ÀÖ¾ú°í ÀÌ·Î ÀÎÇØ »ý¼ºµÈ NO°¡ ½Å¼Õ»ó ¹ß»ý¿¡ ÀϺΠ°ü¿©ÇÒ °ÍÀ¸·Î ÃßÁ¤µÇ¾î iNOS¾ïÁ¦
Á¦¸¦ ÀÌ¿ëÇÏ¿© NOÀÇ »ý¼ºÀ» ¾ïÁ¦ÇÔÀ¸·Î½á ¹Ì¾àÇÑ ½Åµ¶¼º ¾ïÁ¦È¿°ú¸¦ °üÂûÇÒ ¼ö ÀÖ¾ú´Ù. ÇÏ
Áö¸¸ ÇöÀç±îÁö´Â iNOS¾ïÁ¦Á¦°¡ °®´Â ºÎÀÛ¿ë¿¡ ´ëÇÑ ¿¬±¸°¡ ¹Ì¹ÌÇÏ°í Á¤»ó ½ÅÀå¿¡¼­ iNOS
ÀÇ ¿ªÇÒ ¹× Ç×¾ÏÁ¦¿Í ¸é¿ª ¾ïÁ¦Á¦¿¡ ÀÇÇÑ ¾Ï¼¼Æ÷ »ì»ó±âÀü¿¡¼­ iNOSÀÇ ¿ªÇÒÀÌ ¸íÈ®ÇÏ°Ô È®
ÀεÇÁö ¾Ê°í Àֱ⠶§¹®¿¡ iNOS¾ïÁ¦Á¦ÀÇ È¿°úÀûÀÎ Àû¿ëÀ» À§Çؼ­´Â ÇâÈÄ ÀÌ¿¡ ´ëÇØ Ãß°¡Àû
ÀÎ ¿¬±¸°¡ ÇÊ¿äÇÒ °ÍÀ¸·Î »ý°¢µÈ´Ù.

Purpose : This study was designed to investigate the role of NO In cisplatin induced
nephrotoxicity of rats, especially in association with expressions of inducible nitric oxide
snythase(iNOS) and the effects of iNOS inhibitor.
Materials and Methods : Male, Sprague-Dawley rats weighing 170-190gm were used.
Nephrotoxicity was induced by single intraperitoneal administration of cisplatin(10§·/§¸).
Aminoguanidine sulfate(300§·/§¸), a relatively specific iNOS inhibitor, was administrated
30 minutes prior to cisplatin administration. Individual kidneys were obtained from
control, cisplatin single treated and cisplatin combined with aminoguanidine treated rats
at 6, 12, 24, 48, 72hours and 7days after cisplatin administration.
Serum BUN/creatinine(§·/§£), the unit weight of rat kidney (kidney wet weight/body
weight) were estimated. HE stain was performed for histologic evaluation of
nephrotoxicity. The expressions of iNOS were assessed by Western blotting and
RT-PCR.
Results : Serum BUN/creatinine levels in aminoguanidine treated groups were
suppressed its increment significantly at 12, 24 and 48 hours compared with cisplatin
single treated groups(p<0.05). The unit weight of kidneys in aminoguanidine treated
groups were decreased significantly at 24 and 48 hours compared with cisplatin single
treated groups(p<0.05). Western blotting represents intense iNOS protein bands(117KDa)
at 24, 48 and 72 hours in cisplatin single treated groups. RT-PCR assay for iNOS
mRNA(429bp) were weakly expressed in control groups and intense expressions were
identified in cisplatin single treated and cisplatin combined with aminoguanidine treated
groups at 6, 12, 24 and 72hours.
Conclusions : From these results, it is suggested that cisplatin induced nephrotoxicity
may be partly mediated by NO. Aminoguanidine may delay or suppress the cisplatin
induced nephrotoxicity of rat kidney.

Å°¿öµå

Cisplatin; iNOS; Aminoguanidine; Nephrotoxicity;

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