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Abstract

¼­·Ð
¾Ï¼¼Æ÷ Áõ½Ä¿¡ ÇÊ¿äÇÑ ¼ºÀåÀÎÀÚ´Â ½ÅüÀÇ ¸ðµç Á¶Á÷¿¡ Á¸ÀçÇϸç, ƯÁ¤ À¯ÀüÀÚ(master
gene)¿¡ ÀÇÇØ ±× ¹ßÇöÀÌ Á¶ÀýµÇ¾î °¢ Àå±âÀÇ ¼ºÀå°ú ºÐÈ­°¡ À¯µµµÈ´Ù. ±×·¯³ª ¾Ç¼º Á¾¾ç¿¡
¼­´Â ÀÌµé ¼ºÀå ÀÎÀÚ ¹× ±× ¼ö¿ëüÀÇ ¹ßÇöÀÌ ºñÁ¤»óÀûÀ¸·Î Á¶ÀýµÇ¾î ¿ÀÅäÅ©¸° °æ·Î¸¦ ÅëÇÑ
Á¾¾ç ¼¼Æ÷ÀÇ Áõ½ÄÀ¯µµ³ª, ÆĶóÅ©¸° °æ·Î¸¦ ÅëÇÑ ÁÖÀ§ ¼¶À¯¾Æ¼¼Æ÷³ª ³»ÇÇ ¼¼Æ÷ÀÇ ¼ºÀå À¯µµ
·Î ¾ÏÀÇ Áõ½Ä°ú ħÀ± ¹× ÀüÀ̸¦ ÃËÁø½ÃÅ°°Å³ª Á¾¾ç Ç÷°ü Çü¼ºÀ» Áõ°¡½ÃŲ´Ù.
À§¾Ï ¼¼Æ÷ÁÖ¿¡¼­´Â ¼ºÀå ÀÎÀÚÀÇ ÀÏÁ¾ÀÎ Midkine(MK)ÀÌ °üÂûµÇ¾úÀ¸¸ç, MK ¹ßÇö°ú À§Á¾
¾ç Å©±â¿ÍÀÇ »ó°ü¼ºµµ °üÂûµÇ¾î, MK°¡ À§¾ÏÀÇ Áõ½Ä°ú °ü°è ÀÖÀ» °ÍÀ¸·Î Á¦½ÃµÇ¾ú´Ù ¾Ï¼¼Æ÷
¿¡¼­ ºÐºñµÇ´Â ´ëºÎºÐÀÇ Á¾¾ç ¼ºÀå ÀÎÀÚ È¤Àº Ç÷°ü»ý¼º ÀÎÀÚ´Â ÇìÆĸ°°ú °áÇÕÇÏ¿© È°¼ºÈ­µÇ
¹Ç·Î, À̵é ÇìÆĸ°°áÇÕ ¼ºÀåÀÎÀÚ(heparin-binding growth factor, HBGF)µéÀÇ È°¼ºÈ­ ¹× ±â
´ÉÀ» ¾ïÁ¦ÇÏ´Â heparin analogue·Î ¾Ï¼¼Æ÷ Áõ½ÄÀ» ¾ïÁ¦ÇÏ·Á´Â »ý¹°ÇÐÀû Ä¡·á(biological
therapy)°¡ »õ·Î¿î ¾ÏÄ¡·á °³³äÀ¸·Î Á¦½ÃµÇ°í ÀÖ´Ù.
¾ÏÀÇ Ä§À±°ú ÀüÀÌ °úÁ¤¿¡ ÇʼöÀûÀÎ ±âÀú¸· ¿ëÇØ¿¡ ÁßÃßÀû ¿ªÇÒÀ» ÇÏ´Â serine protease¿Í
MMPsÀÇ ½ÇÁ¦ ÀÎü ¿©·¯ ¾ÏÁ¾¿¡¼­ÀÇ ¹ßÇö Áõ°¡°¡ º¸°íµÇ¾ú´Ù. Serine proteaseÀÇ ÀÏÁ¾ÀÎ
urok-inase-type plasminogen activator (uPA)´Â p1asminogen¿¡¼­ plasmicÀ¸·ÎÀÇ ÀüȯÀ»
Áõ°¡½ÃÅ°¸ç, plasmicÀº Á¾¾ç ÁÖÀ§ÀÇ ±âÁúÀ» ±¸¼ºÇÏ°í ÀÖ´Â fibrin, fibronectin, proteoglycan,
lamininµîÀ» Á÷Á¢ Æı«ÇÒ »Ó ¾Æ´Ï¶ó, type IV collagenase¸¦ È°¼ºÈ­½ÃÄÑ type ¥³collagenÀ»
°£Á¢ÀûÀ¸·Î Æı«½ÃŲ´Ù. uPA´Â »ý¸®Àû ¾ïÁ¦ ¹°ÁúÀÎ plasminogen activator inhibitor(PAI-1)
¿¡ ÀÇÇØ ¼±ÅÃÀûÀ¸·Î ¾ïÁ¦µÈ´Ù. ¶ÇÇÑ MMPs´Â ¾Ï¼¼Æ÷ ȤÀº ±âÁú ¼¼Æ÷¿¡¼­ »ý¼ºµÇ¸ç ±âÀú¸·
ÀÇ ÁÖ¼ººÐÀÎ type IV collagenÀ» Æı«ÇÏ°í, 92 kD (MMP-9)Çü°ú 72 kD (MMP-2)ÇüÀÌ ÀÖ
´Ù. MMP-9Àº tissue inhibitor of matrix metalloproteinase-1 (TIMP-1), MMP-2´Â
TIMP-2¿¡ ÀÇÇØ ±× È°¼ºÀÌ ¾ïÁ¦µÈ´Ù. µû¶ó¼­ ¾ÏÁ¶Á÷¿¡¼­ °üÂûµÇ´Â ÀÌµé ´Ü¹éºÐÇØÈ¿¼Ò¿Í ±×
¾ïÁ¦Á¦ÀÇ ºÒ±ÕÇüÀ» Á¶ÀýÇÔÀ¸·Î½á ¾Ï ħÀ±À» ¾ïÁ¦ÇÒ ¼ö ÀÖ´Ù.
ÀÌ¿¡ ÀúÀÚµéÀº ÀÎüÀÇ À§¾Ï ¼¼Æ÷ÁÖ¸¦ ÀÌ¿ëÇÏ¿© °¢ ¼¼Æ÷ÁÖº° »ý¹°ÇÐÀû È°¼ºÀÇ Â÷À̸¦ ºñ±³
ÇÏ°í, ¼ºÀåÀÎÀÚ¸¦ ¸ñÇ¥·Î ÇÏ´Â »ý¹°ÇÐÀû Ä¡·áÀÇ °¡´É¼ºÀ» Á¶»çÇØ º¸°íÀÚ ÇÏ¿´´Ù.

Purpose : For tumor growth, invasion and metastasis, a cascade of linked sequential
biological events is essential; overproduction of growth factors, activation of proteolytic
enzymes, induction of tumor angiogenesis, and enhanced tumor cell motility and
attachment. We tried to test whether the biological therapy against the biological targets
can modulate the specific biological characteristics, and furthermore increased anti-tumor
effects can be induced when the biological therapy and cytotoxic chemotherapy were
combined.
Materials and Methods : YCC-1, 2, 3, 7, and ACS human gastric cancer cell lines
were used in these studies. Pentosan polysulfate(PPS) as a heparin-binding growth
factor(HBGF) inhibitor, Tranexamic acid as a plasmin inhibitor, Adriamycin as a
chemotherapeutic agent, were selected. The methods were Northern blot analysis for the
detection of Midkine(MK) expression, soft agar assay for autocrine tumorigenicity. The
expression of uPA, PAI-1 was determined by ELISA, while the MMPs activities were
evaluated by zymography. The effects of each drug on tumorigenicity and tumor cell
proliferation were evaluated by soft agar assay and cell proliferation assay, respectively.
Results: YCC-3, 7, AGS cell lines expressed MK mRNA, whereas YCC-1, 2 did not.
YCC-2 cell line showed increased expression of ePA and MMP activities. Only MK
expressing YCC-3 and 7 cell lines showed the tumorigenicity. PPS suppressed the
colony forming activities as much as Adriamycin did(PPS; 8¡­24%, Adriamycin; 12¡­
40%), but it showed only cytostatic effects in cell proliferation assay(PPS; 60¡­103%,
Adriamycin; (22¡­97%). When PPS was combined with Adriamycin on the Adriamycin
resistant, MK expressing YCC-7 cell line, the growth inhibition rate increased up to 8
¶ó%, while that of PPS or Adriamycin single treatment was 40%, 22%,
respectively(p=0.001).
Conclusion : The modulation of specific biological targets can induce the anti-tumor
effects. This suggests the possible clinical application of biological therapy in gastric

Å°¿öµå

Gastric cancer; Biological therapy; Chemo-sensitization effect;

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