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Lovastatin°ú 5-FU º´¿ë Åõ¿©¿¡ ÀÇÇÑ À§¾Ï ¼¼Æ÷ÁÖ ¼ºÀå ¾ïÁ¦ È¿°ú Effects of Lovastatin in Combination with 5-FU on Stomach Cancer Cells

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Abstract

¸ñ Àû : À§¾Ï ¼¼Æ÷ÁÖ¿¡ ´ëÇÑ lovastatin°ú 5-FU º´¿ë Åõ¿© È¿°ú¸¦ Á¶»çÇÏ¿© À§¾Ï¿¡ ´ëÇÑ
»õ·Î¿î È­Çпä¹ýÀ¸·Î¼­ÀÇ °¡´É¼ºÀ» ¸ð»öÇÏ°íÀÚ º» ¿¬±¸¸¦ ¼öÇàÇÏ¿´´Ù.
´ë»ó ¹× ¹æ¹ý : À§¾Ï ¼¼Æ÷ÁÖ¸¦ ´ë»óÀ¸·Î lovastatin°ú 5-FU¸¦ µ¿½Ã¿¡ ó¸®ÇÑ ÈÄÀÇ ¾Ï¼¼Æ÷
¼ºÀå ¾ïÁ¦ È¿°ú¸¦ Á¶»çÇÏ¿´´Ù. ¿©¼¸ Á¾·ùÀÇ À§¾Ï¼¼Æ÷ÁÖ¸¦ ¿©·¯ ³óµµÀÇ lovastatin°ú 5-FU¸¦
°¢°¢ ȤÀº µ¿½Ã¿¡ 4ÀÏ µ¿¾È ó¸®ÇÑ ÈÄ ¼¼Æ÷ ¼ºÀå ¾ïÁ¦ Á¤µµ¸¦ MTTÃøÁ¤À» ÅëÇØ °áÁ¤ÇÏ¿´
´Ù. ¾àÁ¦ ó¸® ¹æ½Ä¿¡ µû¸¥ thymidylate synthetase mRNA¾çÀÇ Â÷À̸¦ Northern BlotÀ» Åë
ÇØ ºñ±³ÇÏ¿´´Ù.
°á °ú : µÎ ¾àÁ¦¸¦ µ¿½Ã¿¡ ó¸®ÇÑ °á°ú SNU484, SNU16°ú SNU5¿¡¼­´Â »ó½ÂÈ¿°ú
(synergistic effect)¸¦ º¸¿´À¸¸ç SNU601, SNU660°ú SNU1¿¡¼­´Â ÷°¡È¿°ú(additive effect)
°¡ °üÂûµÇ¾ú´Ù. °¢°¢ÀÇ Á¶°Ç¿¡¼­ ¼¼Æ÷ÁÖ±âÀÇ ºÐÆ÷ ¾ç»óÀ» Á¶»çÇÑ °á°ú 5-FU¸¸ ó¸®ÇÑ °æ¿ì
¿Í ºñ±³ÇÏ¿© µÎ ¾àÁ¦¸¦ µ¿½Ã¿¡ ó¸®ÇÑ °æ¿ì S-phaseÀÇ ¼¼Æ÷ºñÀ²ÀÌ °¨¼ÒÇÔÀ» È®ÀÎÇÏ¿´´Ù.
¶ÇÇÑ Lovastatin°ú 5-FU¸¦ µ¿½Ã¿¡ ó ¸®ÇÏ¿´À» ¶§ thymidylate synthetase mRNA ¾çÀº
5-FU¸¸ ó¸®ÇßÀ» ¶§¿Í ºñ±³ÇÏ¿© °¨¼ÒÇÏ´Â ¾ç»óÀ» º¸¿´´Ù.
°á ·Ð : Thymidylate synthetaseÀÇ Áõ°¡°¡ 5-FU¿¡ ´ëÇÑ ³»¼º ±âÀüÀÇ ÇϳªÀÓÀ» °í·ÁÇÒ ¶§
thymidylate synthetase mRNA ¾çÀÇ °¨¼Ò´Â µÎ ¾àÁ¦ÀÇ µ¿½Ã ó¸® °á°ú ³ªÅ¸³ª´Â »ó½ÂÈ¿°ú
ÀÇ ÇÑ ±âÀüÀÏ ¼ö ÀÖÀ» °ÍÀ¸·Î »ç·áµÇ¸ç, ÀÌ·¯ÇÑ Lovastatin°ú 5-FUµ¿½Ã 󸮿¡ ÀÇÇÑ »ó½Â
È¿°ú´Â À§¾Ï Ä¡·á¸¦ À§ÇÑ »õ·Î¿î ¾àÁ¦ º´¿ë Åõ¿©ÀÇ °¡´É¼ºÀ» º¸¿©ÁÖ¾ú´Ù.
#ÃÊ·Ï#I
NTRODUCTION
Gastric adenocarcinoma is one of the most common GI malignancy especially in Korea
and Japan. Even though gastric adenocarcinoma appears to be the most
chemotherapy-responsive neoplasm, current chemotherapy rarely induced complete
responses and duration of the response was short. Recently, various agents have been
applied as biochemical modulators of 5-FU, including leucovorin, interferons and
levamisole. In the present study, we investigated the combination efficacy of lovastatin
and 5-FU in vitro. Lovastatin, a well-known drug for hypercholestolemia, is reported to
have antiproliferative effect as well. Lovastatin is one of fungal antibiotics that are
potent inhibitors of HMG-CoA reductase. Inhibition of HMG-CoA reductase by
lovastatin may result in anti-tumor activity by depriving cells of a variety of
intermediates or end products. Lovastatin has been shown to inhibit DNA synthesis in a
wide range of tumor and normal mammalian cell lines, causing G1 arrest. Although
growth inhibitory effects of lovastatin were variable according to types of cancers, the
effect was dramatically demonstrated in most of prostate and stomach cancer cells
(unpublished data). From our experiment, 5-FU showed additive to even synergistic
effect with lovastatin in stomach cancer cells. We investigated whether lovastatin
potentiated 5-FU cytotoxicity by down regulating thymidylate synthetase that is active
in S phase and known to antagonize 5-FU effect. Further investigations are in progress
to elucidate the mechanism of action and the possible therapeutic value of this
combination.

Å°¿öµå

Lovastatin; 5-FU; Stomach cancer; Thymidylate synthetase;

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