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Genetic Characteristics of Metastatic Colorectal Cancer
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KMID : 0356719940100040387
Abstract
ÀüÀÌÁ¶Á÷¿¡¼ K-ras codon 12¹øÀÇ º¯ÀÌ°¡ 25% nm23H1ÀÇ º¯ÀÌ°¡ 20%, ÀüÀÌ°¡ È®ÀεÈ
Á¾¾çÁ¶Á÷¿¡¼ P53 exon5ÀÇ º¯ÀÌ´Â ¾ø´Â °ÍÀ¸·Î º¸¾Æ, P53 exon5 À¯ÀüÀÚ°¡ ´ëÀåÁ¾¾ç ÀüÀÌ¿Í
ÀÇ Á÷Á¢ÀûÀÎ °ü°è´Â ¾ø´Â °ÍÀ¸·Î ÃßÁ¤µÇ¸ç K-ras, nm23H1 ´© À¯ÀüÀÚ¿Í Á¾¾çÀüÀÌ¿ÍÀÇ °ü°è
À¯¹«¿¡ ´ëÇؼ´Â ¾ÕÀ¸·Î ´õ ¸¹Àº ¿¬±¸°¡ ÇÊ¿äÇϸ®¶ó »ç·áµÈ´Ù.
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Colorectal cancers are characterised by an ability to invade surrounding tissue and
form distant metastasis. To study metastatic behaviour of colorectal cancer at molecular
genetic level, author has investigated P53 exon5, K-ras codon 12 mutation and nm23H1
gene. Tumor were obtained from either colorectal surgical tissues or biopsies from liver
metastasis. Analytical methodologies included PCR-SSCP, PCR amplification
with
specifically degined primers and Southern blot. It was found that 25% (2 of 8) of the
metastatic tumors have K-ras codon 12 mutation, as well as 20% (2 of 10) of them
exibited suspicious loss of heterozygosity of nm23 gene, whereas no mutational changes
were detected in P53 axon 5.
This result suggest P53 exon 5 gene may not have direct relation with colorectal
cancer metastasis. Further studies are needed to elucidate metastatic behaviour of the
colorectal cancer.
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