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Comparative Genomic HybridizationÀ» ÀÌ¿ëÇÑ ¹æ±¤¾Ï¿¡¼­ÀÇ À¯ÀüÀÚ º¯È­ Genetic Alterations in Bladder Cancers Detected by Comparative Genomic Hybridization

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Abstract

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¹ý, Áï ÀÌÇüÁ¢ÇÕü ¼Ò½Ç(Loss of hetrozygosiy, LOH) ȤÀº Southern hybridizationµîÀÇ °Ë»ç
¿¡ ÀÇÇÏ¿© À̵鿡 °üÇÑ Á¤º¸¸¦ ¾òÀ» ¼ö ÀÖ´Ù. ¹æ±¤¾Ï¿¡¼­µµ ÀÌ¹Ì LOH°¡ ¿©·¯ ¿°»öü »ó¿¡
¼­ ¹ß°ßµÇ¾ú´Ù. MYC À¯ÀüÀÚ¿Í °°Àº ¾Ï À¯ÀüÀÚÀÇ È°¼ºÀÇ Áõ°¡µµ 10% Á¤µµÀÇ ¹æ±¤¾Ï¿¡¼­
º¸¿©Áö°í ÀÖ´Ù. ±×·¯³ª À̵éÀº Çѹø ½ÃÇàÇÒ ¶§ Çϳª ȤÀº µÑ Á¤µµÀÇ ¼Ò½ÄÀÚ¸¦ ÀÌ¿ëÇÏ¿© °Ë
»çÇÔÀ¸·Î½á ½Ã°£ÀÌ ¸¹ÀÌ °É¸®°í ¶ÇÇÑ ÀüüÀÇ Á¾¾ç genome»óÀÇ ¾Ë·ÁÁöÁö ¾ÊÀº À¯ÀüÀÚÀÇ º¯
È­¸¦ ¾Ë±â´Â ¸Å¿ì ¾î·Æ´Ù. µû¶ó¼­ ¿°»öü»óÀÇ ´Ù¸¥ ºÎºÐ¿¡ Á¸ÀçÇÏ´Â ¹ÌÁöÀÇ À¯ÀüÀÚº¯ÀÌ¿Í
ÀüüÀûÀÎ Á¾¾ç À¯ÀüÀÚÀÇ º¯È­¸¦ º¸±â À§ÇÏ¿©´Â Á»´õ »õ·Î¿î ¹æ¹ýÀÌ ¿ä±¸µÇ¾ú´Ù.
ºñ±³À¯ÀüÀÚ º¸ÇÕ¹ý (Comparative Genomic Hybridization, CGH)Àº ÃÖ±Ù¿¡ ¹ß°ßµÈ ºÐÀÚÀ¯
ÀüÇÐÀû ¹æ¹ýÀ¸·Î Àüü Á¾¾ç À¯ÀüÀÚÀÇ º¯È­, ÁõÆø ȤÀº °á½ÇÀ» ¾Ë ¼ö ÀÖ´Â ¸Å¿ì À¯¿ëÇÑ ¹æ¹ý
ÀÌ´Ù. CGH´Â µÎ °¡ÁöÀÇ ¼­·Î ´Ù¸¥ Çü±¤À¸·Î Ç¥ÁöµÈ Á¾¾ç DNA¿Í Á¤»ó DNA¸¦ Á¤»ó Áß±â
¿°»öü ¼¼Æ÷¿¡ º¸ÇÕ½ÃÅ´À¸·Î½á °á°ú¸¦ ¾òÀ» ¼ö ÀÖ´Â ¹æ¹ýÀ¸·Î ±âº»Àû ¿ø¸®´Â 2»ö Çü±¤ º¸ÇÕ
¹ý(Fluorescence In situ hybridization)ÀÌ´Ù. Á¤»ó DNA¿¡ ´ëÇÑ Á¾¾ç DNAÀÇ Çü±¤ÀÇ ºñ´Â Á¾
¾ç DNAÀÇ copy¼öÀÇ º¯È­¸¦ ÀǹÌÇÑ´Ù. ÀÌ ¹æ¹ýÀº Àüü Á¾¾çÀ¯ÀüÀÚ¸¦ °Ë»öÇÑ´Ù´Â Àǹ̿¡¼­
Á¾·¡ÀÇ ¼¼Æ÷À¯ÀüÇÐÀû ¹æ¹ý°ú °ßÁÙ ¸¸ ÇÏ´Ù. Áï Á¾¾çÀÇ ¿°»öü ºÐ¼®»ó¿¡¼­µµ °á½ÇÀÌ °ËÃâµÇ
°Å³ª À¯ÀüÀÚ ÁõÆøÀ» ÀǽÉÇÒ ¼ö ÀÖ´Â ºÎÀ§ÀÎ µ¿Áú¿°»öºÎºÐ(homogenously staining region)
ȤÀº double minute ¿°»öü°¡ ³ªÅ¸³­´Ù. ±×·¯³ª Á¾¾çÁ¶Á÷ÀÇ ¿°»öü ºÐ¼®Àº ±×¸® °£´ÜÇÏÁö
¾Ê´Ù. Á¾¾ç¼¼Æ÷ÀÇ ¹è¾ç ¿ä±¸ Á¶°ÇÀÌ ±î´Ù·Î¿ï »Ó ¾Æ´Ï¶ó Á¾¾ç¼¼Æ÷ÀÇ ºÐ¿­ Áö¼ö(mitotic
index)°¡ ³·À» °æ¿ì ÁÁÀº Á߱⼼Æ÷¸¦ ¾ò±â°¡ ¸Å¿ì ¾î·Æ±â ¶§¹®ÀÌ´Ù. CGH´Â ¼¼Æ÷ÀÇ ¹è¾çÀÌ
ÇÊ¿äÇÏÁö ¾Ê°í Á¾·¡ÀÇ ºÐÀÚ»ý¹°ÇÐÀû ¹æ¹ý¿¡¼­ ¿ä±¸µÇ´Â ¿©·¯ °¡Áö ¼Ò½ÄÀÚ µîÀÌ ¿ä±¸µÇÁö ¾Ê
À¸¹Ç·Î ¸Å¿ì °£´ÜÇÏ°Ô ÀÌ¿ëµÉ ¼ö ÀÖ´Ù. ¶ÇÇÑ CGH´Â Á¾¾ç À¯ÀüÀÚ ºÐ¼® »Ó ¾Æ´Ï¶ó À¯Àüº´¿¡
¼­ º¸¿©Áö´Â ¿©·¯ °¡Áö º¹ÀâÇÑ ±¸Á¶ÀÇ ¿°»öü ÀÌ»ó ȤÀº marker ¿°»öüÀÇ ºÐ¼®¿¡¼­µµ ÀÀ¿ë
µÉ ¼ö ÀÖ´Ù.
¹æ±¤¾ÏÀº À¯ÀüÀûÀ¸·Î ¸Å¿ì ÀÌÁúÀûÀÎ Á¾¾çÀÌ´Ù. À̵éÀº ±× µ¿¾ÈÀÇ ¿°»öü ºÐ¼®ÀÇ °á°ú¿¡¼­
µµ º¸¿©ÁöµíÀÌ ¸Å¿ì ±¤¹üÀ§ÇÑ ¼öÀû ±¸Á¶Àû ÀÌ»óÀ» ³ªÅ¸³¿À¸·Î½á ¾Ï¼¼Æ÷ÀÇ ¿©·¯ °¡Áö »ý¹°ÇÐ
Àû ´Ù¾ç¼ºÀ» ³ªÅ¸³½´Ù. ÀúÀÚ´Â À¯ÀüÀû ´Ù¾ç¼ºÀ» Áö´Ï´Â ¹æ±¤¾Ï¿¡¼­ CGH¸¦ ½ÃÇàÇÏ¿© °¢ ¿°
»öü »ó¿¡¼­ÀÇ Á¾¾ç À¯ÀüÀÚ º¯È­¸¦ Á¶»çÇÏ¿© º½À¸·Î½á »õ·Î¿î À¯ÀüÀÚ º¯È­¸¦ ã°í Á¾¾ç À¯
ÀüÀÚ ºÐ¼®¿¡¼­ÀÇ CGHÀÇ À¯¿ë¼ºÀ» ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù.

Purpose : Cytogenetic and genetic alterations of tumors are closely related with
progression and promotion of cancers. Comparative genomic hybridization (CGH) has
known to be a novel tool for the detection of genetic alteration in solid cancers. We
performed CGH for the detection of new genetic alterations of bladder tumors.
Materials and Methods : Biotin-labeled tumor DNA and digoxigenin-labeled normal
DNA were hybridized to normal metaphase cells. The fluorescence signals were captured
by fluorescence microscope after detection by avidin FITC and antidigoxigenin rhodamin.
Then, the ratio of fluorescence was calculated by an image analyzer.
Results : CGH results showed amplifications on chromosomes 1q, 3q, 4q, 5p, 6pq, 7p,
8q, l1q, 12q, 13q, 17q, 18q and 20pq (more than 20% of cases). Deletions were on
chromosome 2q21-qter, 4q13-q23, 5q, 8p12-p22, 9pq, 11p13-p15 (more than 20% of
cases). High level amplifications were noted on chromosomes 1q31-qter, 3p21, 3q24,
4q26, 8q21-qter, 11q14-qter, 12q15-q2l, 12q21-q24, 13q21-q3l, 17q22, 18q22.
Conclusion : We considered that the amplification on chromosome 4q26, 11q14-qter,
12q21-q24, 18q12 and deletion on 4q11-4q13 as a novel genetic alterations of bladder
cancer. Our results revealed different pattern of amplifications that affect other regions
from previous study on chromosome 7, 11q, 12q, 13q, and 18q. CGH was very useful for
the screening of genetic alterations of solid tumors.

Å°¿öµå

Bladder tumor; CGH; Genetic alterations;

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