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Abstract

¸ñ Àû: ¹æ»ç¼±Ä¡·á¿Í Ç×¾ÏÁ¦Ä¡·áÀÇ ±Þ¼ººÎÀÛ¿ëÀº ȯÀÚ °³Àο¡ µû¶ó Â÷ÀÌ°¡ ¸¹´Ù´Â °ÍÀº ÀÓ»ó°æÇèÀ» ÅëÇÏ¿© ³Î¸® ¾Ë·ÁÁ® ÀÖ´Ù. ±×·¯³ª ¾ÆÁ÷ À̸¦ ¹Ì¸® ¿¹ÃøÇÒ ¼ö ÀÖ´Â ÀÎÀÚ·Î ¾Ë·ÁÁø °ÍÀº ¾ø´Ù. XRCC1 À¯ÀüÀÚ´Â DNA base-excision repair¿¡ °ü¿©ÇÏ´Â À¯ÀüÀÚ·Î ¾Ë·ÁÁ® ÀÖ´Ù. ÀúÀÚµéÀº ´ëÀå Á÷Àå¾Ï ȯÀÚ¸¦ ´ë»óÀ¸·Î ¹æ»ç¼±Ä¡·á¿Í Ç×¾ÏÁ¦Ä¡·á·Î ÀÎÇÑ ±Þ¼ººÎÀÛ¿ë°ú XRCC1 À¯ÀüÀÚÀÇ ´ÙÇü¼ºÀÌ °ü·ÃÀÌ ÀÖ´ÂÁö¸¦ ¾Ë¾Æº¸°íÀÚ º» ¿¬±¸¸¦ ¼öÇàÇÏ°Ô µÇ¾ú´Ù.

´ë»ó ¹× ¹æ¹ý: 1997³â 7¿ùºÎÅÍ 2003³â 6¿ù±îÁö ÀÎÇÏ´ëÇб³º´¿ø¿¡¼­ Ä¡·á¸¦ ¹ÞÀº ´ëÀå Á÷Àå¾Ï ȯÀÚ 86¸íÀ» ´ë»óÀ¸·Î ÇÏ¿´´Ù. ´ëÀå¾ÏÀÌ 2¸í, SÀÚ°áÀå¾ÏÀÌ 13¸í, Á÷Àå¾ÏÀÌ 71¸íÀ̾ú´Ù. º´±â´Â B±â°¡ 22¸í, C±â°¡ 50¸í, D±â°¡ 8¸íÀ̾ú°í ÀýÁ¦ ºÒ°¡´ÉÇÑ °æ¿ì°¡ 6¸íÀ̾ú´Ù. ¹æ»ç¼±Ä¡·á ¹üÀ§´Â °ñ¹Ý°­¸¸ Á¶»çµÈ °æ¿ì°¡ 81¸í, extended field·Î Á¶»çµÈ °æ¿ì°¡ 5¸íÀ̾ú°í ¹æ»ç¼±·®Àº ÀÏÀÏ 1.8 Gy·Î ÁÖ 5ȸ Á¶»çÇÏ¿© ÃÑ 30.6 Gy¡­59.4 Gy (Áß¾Ó°ª: 54 Gy)¸¦ Á¶»çÇÏ¿´´Ù. Ç×¾ÏÁ¦Ä¡·á´Â Àü ȯÀÚ¿¡¼­ 5 FU¸¦ ±Ù°£À¸·Î ÇÑ ¾àÁ¦¸¦ Åõ¿©¹Þ¾Ò°í ¹æ»ç¼± Ä¡·á±â°£ Áß¿¡ ½ÃÇàµÈ Ƚ¼ö´Â 1ȸ°¡ 24¸í, 2ȸ°¡ 45¸íÀ̾ú°í 17¸íÀº µ¿½Ã¿¡ Åõ¿© ¹ÞÁö´Â ¾Ê¾Ò´Ù. Ä¡·áÀÇ ±Þ¼ººÎÀÛ¿ëÀº »óºÎÀ§Àå°ü°ú ÇϺÎÀ§Àå°üÀ¸·Î ³ª´©¾î ±â·ÏÇÏ¿´°í Áõ»óÀÌ ÀüÇô ¾ø´Â °æ¿ì¸¦ 0, Áõ»óÀÌ ÀÖÀ¸³ª Åõ¾àÀÌ ÇÊ¿äÇÏÁö ¾ÊÀº °æ¿ì¸¦ 1, Åõ¾àÀÌ ÇÊ¿äÇÑ °æ¿ì¸¦ 2, Åõ¾à¿¡µµ ºÒ±¸ÇÏ°í Áõ»óÀÌ ½ÉÇÏ¿© Ä¡·áÀÇ ÈÞ½Ä ¶Ç´Â ÀÔ¿øÀ» ÇÑ °æ¿ì¸¦ 3À¸·Î ºÐ·ùÇÏ¿´°í Àü Ä¡·á±â°£ Áß ÃÖÃÊ, ÃÖÀú ¼öÄ¡¿Í ¹æ»ç¼±Ä¡·á±â°£ Áß ÃÖÃÊ, ÃÖÀú ¹éÇ÷±¸, Ç÷¼ÒÆÇ ¼öÄ¡¸¦ Á¶»çÇÏ¿´´Ù. ȯÀÚÀÇ µ¿ÀÇ ÇÏ¿¡ Ç÷¾×À» äÃëÇÏ¿© ¸²ÇÁ±¸¸¦ ºÐ¸®ÇÑ ÈÄ DNA¸¦ ÃßÃâÇÏ¿© PCR-RFLP ¹æ¹ýÀ¸·Î XRCC1 À¯ÀüÀÚÀÇ ÄÚµ· 194, 280, 399¹ø À§Ä¡ÀÇ ´ÙÇü¼ºÀ» ºÐ¼®ÇÏ¿´´Ù. Åë°è´Â Chi-square, t-test, logistic regression, ANOVA¸¦ »ç¿ëÇÏ¿´´Ù.

°á °ú: ´Ùº¯·® ºÐ¼®°á°ú »óºÎÀ§Àå°ü ºÎÀÛ¿ë¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â ÀÎÀÚ´Â Àç¹ßÀ¯¹«¿´°í, ÇϺÎÀ§Àå°üÀÇ ºÎÀÛ¿ë¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â ÀÎÀÚ´Â XRCC1 339 ´ÙÇü¼º, ¹æ»ç¼±·®, ¹æ»ç¼± Áß Ç×¾ÏÁ¦È½¼ö ¼øÀ̾ú´Ù. ¹æ»ç¼± Ä¡·á Áß ¹éÇ÷±¸ °¨¼Ò¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â ÀÎÀÚ´Â XRCC1 399 ´ÙÇü¼º, 194 ´ÙÇü¼ºÀ̾ú°í, Ç÷¼ÒÆÇ °¨¼Ò¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â ÀÎÀÚ´Â Áø´Ü¸í, XRCC1 399 ´ÙÇü¼ºÀ̾ú´Ù.

°á ·Ð: ´ëÀå Á÷Àå¾Ï ȯÀÚ¿¡¼­ ¹æ»ç¼±Ä¡·á¿Í Ç×¾ÏÁ¦ÀÇ Ä¡·á¿¡ µû¸¥ Á¤»óÁ¶Á÷ÀÇ ±Þ¼ººÎÀÛ¿ëÀ» ¿¹ÃøÇϴµ¥ XRCC1 À¯ÀüÀÚÀÇ ÄÚµ· 399¹øÀÇ ´ÙÇü¼ºÀÌ »ç¿ëµÉ °¡´É¼ºÀÌ ÀÖÀ» °ÍÀ¸·Î »ý°¢µÈ´Ù.

Purpose: It is well known from clinical experience that acute complications of chemoradiation therapy vary from patients to patients. However, there are no known factors to predict these acute complications before treatment starts. The human XRCC1 gene is known as a DNA base excision repair gene. We investigated the possibilities of XRCC1 gene polymorphisms as a predictor for the acute complications of chemoradiation therapy in colorectal cancer patients.

Materials and Methods: From July 1997 to June 2003, 86 colorectal cancer patients (71 rectal cancer, 13 sigmoid colon cancer and 2 colon cancer patients) were treated with chemoradiation therapy at the Department of Radiation Oncology, Inha University Hospital. Twenty-two patients were in stage B, 50 were in stage C, 8 were in stage D and 6 patients were unresectable cases. External radiation therapy was delivered with 10MV X-ray at a 1.8 Gy fraction per day for a total dose of radiation of 30.6¡­59.4 Gy (median: 54 Gy). All the patients received 5-FU based chemotherapy regimen. We analyzed the acute complications of upper and lower gastrointestinal tract based on the RTOG complication scale. The initial and lowest WBC and platelet count were recorded during both the RT period and the whole treatment period. Allelic variants of the XRCC1 gene at codons 194, 280 and 399 were analyzed in the lymphocyte DNA by performing PCR-RFLP. Statistical analyses were carried out with the SAS (version 6.12) statistical package.

Results: When all the variables were assessed on the multivariate analysis, recurrent disease revealed the factors that significantly correlated with upper gastrointestinal acute complications. Arg399Gln polymorphisms of the XRCC1 gene, the radiation dose and the frequencies of chemotherapy during radiation therapy were significantly correlated with lower gastrointestinal complications. Arg399Gln polymorphisms also affected the decrease of the WBC and platelet count during radiation therapy.

Conclusion: Although the present sample size was too small for fully evaluating this hypothesis, this study suggests that Arg399Gln polymorphisms of the XRCC1 genes may be used as one of the predictors for acute complications of chemoradiation therapy in colorectal cancer patients.

Å°¿öµå

´ÙÇü¼º;´ëÀåÁ÷Àå¾Ï;ºÎÀÛ¿ë;Polymorphism;XRCC1;Colorectal cancer;Complication

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