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Abstract

¼­·Ð
¾ÏÀÇ ¹ß»ý°ú ÁøÇà¿¡´Â ¼¼Æ÷ÀÇ ¼ºÀå°ú ºÐÈ­¿¡ °ü¿©ÇÏ´Â ¸¹Àº À¯ÀüÀÚÀûÀÎ º¯È­°¡ ÀϾ´Ù
°í ¾Ë·ÁÁ® Àִµ¥ À̸¦ ´ëº°ÇÏ¸é ¾ÏÀ¯ÀüÀÚ È°¼ºÈ­¿Í Á¾¾ç¾ïÁ¦ À¯ÀüÀÚÀÇ ºÒÈ°¼ºÈ­°¡ ÀÖ´Ù.
Á¾¾ç¾ïÁ¦À¯ÀüÀÚ´Â Á¤»ó ¼¼Æ÷ À¯ÀüÀڷνá À̵éÀÌ ºÒÈ°¼ºÈ­µÇ¸é ¼¼Æ÷ÀÇ Áõ½Ä¿¡ Àå¾Ö¸¦ ÃÊ·¡ÇÏ
¿© ¾ÏÀÌ ¹ß»ýÇÑ´Ù. p53À¯ÀüÀÚ´Â 17¹ø ¿°»öüÀÇ ´Ü¿Ï¿¡ À§Ä¡ÇÏ´Â 16¡­20kbÀÇ UNA·Î 11°³ÀÇ
econÀ¸·Î ÀÌ·ç¾îÁ® ÀÖ°í p53 À¯ÀüÀÚ°¡ °á¼ÕµÇ°Å³ª µ¹¿¬º¯ÀÌ¿¡ ÀÇÇÑ ±×±â´É »ó½ÇÀÌ ¾Ï ¹ßº´
ÀÇ ÇÑ°¡Áö ¿äÀÎÀ̶ó°í »ý°¢µÇ°í ÀÖ´Ù.
p53 À¯ÀüÀÚÀÇ µ¹¿¬º¯À̸¦ °Ë»öÇÏ´Â ¹æ¹ýÀ¸·Î´Â ¿°±â¼­¿­ È®Àιý(nucleotide sequencing),
ÁßÇÕÈ¿¼Ò ¿¬¼â¹ÝÀÀ-´ÜÀÏ°¡´Ú±¸Á¶´ÙÇü(polymerase chain react-tion-single strand
conformation polymorphism)°Ë»ç¹ý, ¸é¿ªÁ¶Á÷È­ÇÐ ¿°»ö(immunohistochemical staining)µîÀÌ
ÀÖ´Ù. ¿°±â¼­¿­ È®ÀιýÀº À¯ÀüÀÚÀÇ ±¸Á¶ÀÌ»óÀ» È®ÀÎÇϴµ¥ ÈçÈ÷ ÀÌ¿ëµÇ°í µ¹¿¬º¯ÀÌÀÇ À¯¹«
¹× ±× ¾ç»óÀ» Á÷Á¢ È®ÀÎÇÒ ¼ö ÀÖ´Â ¹æ¹ýÀ̳ª ½Ã°£°ú ³ë·ÂÀÌ ¸¹ÀÌ µå´Â ´ÜÁ¡ÀÌ ÀÖ´Ù. ÁßÇÕÈ¿
¼Ò¿¬¼â¹ÝÀÀ-´ÜÀÏ°¡´Ú±¸Á¶´ÙÇü °Ë»ç¹ýÀº ÇÙ»êÀÇ ±¸¼º¿°±âÀÇ Â÷ÀÌ¿Í ¿°±â¼­¿­ÀÇ Â÷ÀÌ¿¡ µû¶ó
¼­ Àü±â¿µµ¿½Ã ÇÙ»êÀÇ À̵¿¼ÓµµÀÇ Â÷À̸¦ ÀÌ¿ëÇÏ´Â ¹æ¹ýÀε¥ °¨¼ö¼º°ú ƯÀ̼ºÀÌ ³ô´Ù. ¸é¿ª
Á¶Á÷È­ÇÐÀûÀÎ ¿°»öÀº µ¹¿¬º¯ÀÌÇü ´Ü¹éÁúÀÇ ¹Ý°¨±â°¡ ¼ö½Ã°£ ȤÀº ±× ÀÌ»óÀ¸·Î ¿¬ÀåµÇ´Â Ư
¼ºÀ» ÀÌ¿ëÇÏ¿© µ¹¿¬º¯ÀÌÇü p53 ´Ü¹éÁúÀ» È®ÀÎÇÏ´Â ¹æ¹ýÀε¥ °¨¼ö¼º°ú ƯÀ̼ºÀÌ ³·´Ù.
¿¬±¸ÀÚµéÀº À§¾ÏÁ¶Á÷¿¡¼­ p53 À¯ÀüÀÚ º¯À̸¦ ÁßÇÕÈ¿¼Ò¿¬¼â¹ÝÀÀ-´ÜÀÏ°¡´Ú±¸Á¶´ÙÇü °Ë»ç¹ý,
Non Isotope RNase Cleavage Assay (NIRCA) ¹æ¹ý°ú ¸é¿ªÁ¶Á÷È­Çп°»öÀÇ ¹æ¹ýÀ» ÀÌ¿ëÇÏ
¿© ÀÌµé °Ë»ç¹æ¹ýÀÇ Àå´ÜÁ¡À» ¾Ë¾Æº¸°í, p53À¯ÀüÀÚÀÇ º¯ÀÌ¿Í È¯ÀÚÀÇ ¾Ïº´±â ¹× ºÐÈ­µµ µî°ú
ºñ±³ ºÐ¼®ÇÏ¿´´Ù.
#ÃÊ·Ï#
Purpose : The aim of the present study was: (a) to determine the frequency of p53
mutations by single strand conformational polymorphism analysis of polymerase chain
reaction products (PCR-SSCP), Non-Isotopic RNase Cleavage Assay (NIRCA) and
immunohistochemical staining with monoclonal antibody; and (b) to compare the
correlations among these methods.
Materials and Methods : Abberations of the p53 gene in 24 primary gastric
carcinomas were examined by PCR-SSCP, NIRCA and immunohistochemical staining. Of
these surgically resected gastric adenocarcinomas, 23 were advanced gastric carcinomas
and 1 was early gastric cancer. Using PCR-SSCP and NIRCA, the presence of
mutations in exons 4-9 was evaluated. Using the mouse specific anti-human pf3
monoclonal antibody, we also looked for overexpression of the p53 protein in tissue
sections.
Results : In 5 cases shifted bands were reproducibly identified by PCR-SSCP, and
two mutations were identified in exon 4 and three in 5 & 6. The mutations of econ 4
were detected by NIRCA in 5 cases, exon 5 & 6 in 6 cases, and exon 7 in 2 cases.
The p53 mutations detected by PCR-SSCP were also detected by NIRCA except one
case. Thirteen of the tumor samples were positively stained with the monoclonal
antibody for p53 protein. There was no correlation between p53 mutations detected by
NIRCA and expression of p53 protein by immunohistochemical staining.
Conclusions : Our results in this group of patients suggest that NIRCA is more
sensitive than PCR-SSCP in detecting p53 mutations, and expression of p53 protein by
immu-nohistochemical staining does not directely represent the genetic changes of p53
gene.

Å°¿öµå

Gastric cancer; p53; PCR-SSCP; Non-Isotopic RNase Cleavage Assay; Immunohistochemical staining;

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