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ÀÎü °£¾Ï ¼¼Æ÷ÁÖ¿¡ ·¹Æ®·Î¹ÙÀÌ·¯½º¸¦ ÀÌ¿ëÇÑ Herpes Simplex VirusÀÇ Thymidine Kinase À¯ÀüÀÚÀÇ ÇüÁúµµÀÔÀÌ Ganciclovir °¨¼ö¼º¿¡ ¹ÌÄ¡´Â ¿µÇâ Effects of Herpes Simplex Virus - Thymidine Kinase Gene Transduction into the Hepatocellular Carcinoma Cell Lines Using the Retrovirus on Ganciclovir Cytotoxicity

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Abstract

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°£¾ÏÀº ¿ì¸® ³ª¶ó¿¡ ÈçÇÑ ¾Ç¼ºÁ¾¾çÀÇ Çϳª·Î ´ëºÎºÐ ¸¸¼º °£¿° ÈÄ, ÁøÇàµÈ °£°æº¯À» µ¿¹Ý
ÇÑ 5 cmÀÌ»óÀÇ Å« °£¾ÏÀ¸·Î ¹ß°ßµÇ´Â °æ¿ì°¡ ¸¹À¸¸ç, ´ëºÎºÐÀÇ È¯ÀÚ´Â Áø´Ü ÈÄ 6°³¿ù À̳»
¿¡ »ç¸ÁÇÏ°í Ä¡·á¸¦ ¹ÞÁö ¾Ê´Â °æ¿ìÀÇ Áß¾Ó»ýÁ¸ ±â°£Àº ¾à 1¡­4°³¿ù Á¤µµ·Î ´ë´ÜÈ÷ ¿¹ÈÄ°¡
ºÒ·®ÇÑ ¾ÏÀÌ´Ù. ÀÌ¿Í °°ÀÌ ºÒ·®ÇÑ °£¾ÏÀÇ ¿¹Èĸ¦ °³¼±Çϱâ À§Çؼ­´Â ±âÁ¸ÀÇ ¼ö¼ú, °£µ¿¸Æ ³»
Ç×¾ÏÁ¦ ÁÖÀÔ¹ý ¹× ¹æ»ç¼±Ä¡·á ¿Ü¿¡µµ À¯ÀüÀÚ Ä¡·á¿Í °°Àº »õ·Î¿î Ä¡·á¹ýÀÇ °³¹ßÀÌ Àý½ÇÇÑ
»óÅÂÀÌ´Ù. À¯ÀüÀÚ Ä¡·á´Â À¯ÀüÀû °áÇÔÀ» ±³Á¤Çϱâ À§ÇÏ¿© ¶Ç´Â ƯÁ¤ ¼¼Æ÷¿¡ »õ·Î¿î À¯ÀüÀû
±â´ÉÀ» ºÎ¿©Çϱâ À§ÇÏ¿© ¼¼Æ÷ ³»¿¡ À¯ÀüÀÚ¸¦ »ðÀÔÇÏ¿© Áúº´À» Ä¡·áÇÏ´Â ¹æ¹ýÀ¸·Î Á¤ÀÇÇÒ ¼ö
ÀÖ´Ù. ¾Ï¿¡ ´ëÇÑ À¯ÀüÀÚ Ä¡·á½ÃÀÇ Àü·«À¸·Î´Â p53¿Í °°Àº tumor suppressor gene, Herpes
simplex virusÀÇ thymidine kinase(HSV-tk) À¯ÀüÀÚ¿Í °°Àº drug-sensitivity gene,
immunotherapy¸¦ À§ÇÑ interleukin ¶Ç´Â tumor necrosis factor gene, Ç×¾ÏÁ¦ Åõ¿©¿¡ ÀÇÇÑ
°ñ¼ö Á¶Ç÷°£¼¼Æ÷(hematopoietic stem cell)ÀÇ ¼Õ»óÀ» ¾ïÁ¦ÇÏ¿© °í¿ë·® ¶Ç´Â È¿°úÀûÀÎ È­Çпä
¹ýÄ¡·á¸¦ À§ÇÑ MDR(multidrug resistance) À¯ÀüÀÚÀÇ ÀÌ¿ë, ±×¸®°í antisense RNA¸¦ ÇÕ¼ºÇÏ
±â À§ÇÑ antisense DNAµîÀÇ ÀÌ¿ë µîÀÌ ÀÖ´Ù. HSV-tk À¯ÀüÀÚ´Â bacterial cytosine
deaminase gene°ú °°ÀÌ ´ëÇ¥ÀûÀÎ drug susceptibility(suicide) À¯ÀüÀÚ·Î, HSV-tk À¯ÀüÀÚÀÇ
»ê¹°Àº guanosine analogueÀÎ ganciclovir(GCV)¸¦ ÀλêÈ­½ÃÄÑ DNA ÇÕ¼ºÀ» ÁߴܽÃų ¼ö ÀÖ
´Â intermediate·Î Àüȯ½ÃÄÑ cell death¸¦ À¯µµÇÑ´Ù. CulverµîÀº ratÀÇ glioma ¸ðµ¨À» ÀÌ¿ëÇÏ
¿© HSV-tk À¯ÀüÀÚ°¡ ÇüÁú µµÀÔµÈ ¼¼Æ÷°¡ Àüü Á¾¾ç¼¼Æ÷ÀÇ 10%¸¸ µÇ¾îµµ GCVÀÇ Åõ¿©·Î
Á¾¾çÀÇ ¿ÏÀüÅðÇàÀÌ °¡´ÉÇÔÀ» º¸°íÇÏ¿© bystander È¿°ú¸¦ HSV-tk À¯ÀüÀÚ¸¦ ÀÌ¿ëÇÑ À¯ÀüÀÚ
Ä¡·áÀÇ ÀåÁ¡À¸·Î Á¦½ÃÇѹ٠ÀÖ´Ù. º» ¿¬±¸´Â, ÀÌ·¯ÇÑ ¹è°æ ÇÏ¿¡, HSV-tk À¯ÀüÀÚ¸¦
subcloningÇÑ ÀçÁ¶ÇÕ ·¹Æ®·Î¹ÙÀÌ·¯½º(LNC/HSV-tk)¸¦ Á¦Á¶ÇÏ¿© HSV-tk À¯ÀüÀÚ¸¦ °£¾Ï¼¼
Æ÷ÁÖ¿¡ ÇüÁú µµÀÔÇÒ ¶§ in vitro ¹× in vivo¿¡¼­ Ç×¹ÙÀÌ·¯½ºÁ¦ÀÎ GCV¿¡ ´ëÇÑ °£¾Ï¼¼Æ÷ÁÖÀÇ
°¨¼ö¼ºÀÇ º¯È­¿©ºÎ¸¦ ±Ô¸íÇÏ°íÀÚ °èȹµÇ¾ú´Ù.

Purpose : Hepatocellular carcinoma (HCC) is one of the most common malignancy with
high mortality in Korea.4 new therapeutic modality such as gene therapy is necessary to
improve the prognosis of hepatoma patients. Therefore we investigated the preclinical
significance of Herpes simplex virus-thymidine kinase/ganciclovir (HSV-tk/GCV) gene
therapy model using the retroviral vector for HCC cell lines.
Materials and Methods : LNC/HSV-tk retroviral vector and PA317/LNC/HSV-tk
producer cell line were constructed. HSV-tk transduced HCC cells using the
LNC/HSV-tk retrovirus were selected by the G4l8 containing media. In vitro GCV
sensitivity test of the HCC cells was performed by MTf assay. To evaluate in vivo
GCV sensitivity, GCV was intraperitoneally injected after subcutaneous administration of
HCC cells into each flank of the nude mouse.
Results : HSV-tk gene transduction and expression in HCC cells were confirmed by
RT-PCR. HSV-tk transduced HCC cell lines (SK-Hepl/HSV-tk and Hep-3B/HSV-tk)
showed the marked GCV sensitivity comparing with the parental cell lines (SK-Hepl
and Hep-3B) by MTT assay (p<0.001). The MTT test revealed that SK-Hepl/HSV-tk
cells were more sensitive to GCV compare with that of Hep-3B/HSV-tk cells, and the
parent cell line showed minimal growth suppression by the GCV treatment. In 12 nude
mice received tumor cell mixtures of Hep-3B and Hep-3B/HSV-tk cells which contained
more than 50% of HSV-tk transduced cells, the tumor was not developed in 11 mice by
the intraperitoneal administration of GCV. The tumors developed in 1 of 6 mice and S
of 6 mice when mixtures contained 30% and 10% of HSV-tk transduced cells,
respectively. Five mice out of 6 mice received inoculum containing the mixtures of 70%
and 50% of HSV-tk transduced cells into each flank survived more than 6 month after
HSV-tk/GCV treatment.
Conclusion : HSV-tk gene transduced HCC cells showed the enhanced sensitivity to
GCV In nude mice HSV-tNGCV strategy for HCC seemed to be more effective when
tumor cell inoculum contained more than 30% of HSV-tk transduced HCC cells.

Å°¿öµå

Gene therapy; Hematoma; HSV-tk; Ganciclovir; Retroviral factor;

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