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MCF-7 ¼¼Æ÷ÁÖ¿¡¼­ Glutathione S-Transferase K1 (hGSTK1) °ú¹ßÇö¿¡ ÀÇÇÑ ¹æ»ç¼± ³»¼ºÀÇ À¯µµ Inductoin of Radioresistance by Overexpression of Glutathione S-Transferase K1 (hGSTK1) in MCF-7 Cells

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Abstract

¸ñÀû: »ç¶÷ÀÇ À¯¹æ¾Ï ¼¼Æ÷ÀÎ MCF-7 ¼¼Æ÷ÁÖ¸¦ ´ë»óÀ¸·Î gultathione S-transferase K1 (hGSTK1) À¯ÀüÀÚÀÇ ¹ßÇö Á¤µµ ¹× ¹æ»ç¼± Á¶»ç¿¡ ÀÇÇÑ hGSTK1 À¯ÀüÀÚÀÇ ¹ßÇö º¯È­¸¦ °üÂûÇÏ°í hGSTK1 À¯ÀüÀÚ¸¦ °ú¹ßÇö½ÃÅ´À¸·Î½á hGSTK1ÀÌ ¹æ»ç¼± °¨¼ö¼º¿¡ ¾î¶² ¿µÇâÀ»
¹ÌÄ¡´Â
Áö¸¦ °üÂûÇÏ¿´´Ù. Àç·á ¹× ¹æ¹ý: »ç¶÷ÀÇ ¸ðÀ¯µÎ ¼¼Æ÷ pBluescript phagemid cDNA library·ÎºÎÅÍ ¼±º°ÇÑ hGSTK1 cDNA¸¦ pcDNA3.1/ Myc-His (£«) vector¿¡ °áÇÕ½ÃŲ ÈÄ, »ç¶÷ÀÇ À¯¹æ¾Ï ¼¼Æ÷ÀÎ MCF-7 ¼¼Æ÷¿¡ ÀÌÀÔ½ÃÄ×´Ù. hGSTK1 À¯ÀüÀÚ¸¦ ÀÌÀÔ½ÃÅ°Áö ¾ÊÀº MCF-7
¼¼Æ÷¿Í
hGSTK1À» ÀÌÀÔ½ÃŲ MCF-7 ¼¼Æ÷¿¡ 2¡­12 GyÀÇ ¿¢½º¼±À» Á¶»çÇÏ¿© »ýÁ¸ ºÐȹÀ» ºñ±³ÇÏ¿´´Ù. hGSTK1 À¯ÀüÀÚ¸¦ ÀÌÀÔ½ÃÅ°Áö ¾ÊÀº MCF-7 ¼¼Æ÷¿Í hGSTK1À» ÀÌÀÔ½ÃŲ MCF-7 ¼¼Æ÷¿¡¼­ ¹æ»ç¼±·®, ºÐÇÒÁ¶»ç ¿©ºÎ, ¹æ»ç¼± Á¶»ç ÈÄ °æ°ú ½Ã°£¿¡ µû¸¥ hGSTK1 mRNA ¹ßÇöÀÇ Â÷À̸¦
º¸±â
À§ÇÏ¿© RT-PCR ºÐ¼®À» ½ÃÇàÇÏ¿´´Ù. °á°ú: hGSTK1 À¯ÀüÀÚ¸¦ ÀÌÀÔ½ÃÅ°±â ÀüÀÇ MCF-7 ¼¼Æ÷º¸´Ù hGSTK1 À¯ÀüÀÚ¸¦ ÀÌÀÔ½ÃŲ MCF-7 ¼¼Æ÷¿¡¼­ »ýÁ¸ ºÐȹÀÌ À¯ÀÇÇÏ°Ô ³ôÀº °ÍÀ¸·Î ³ªÅ¸³µ´Ù. hGSTK1 À¯ÀüÀÚ¸¦ ÀÌÀÔ½ÃÅ°Áö ¾ÊÀº MCF-7 ¼¼Æ÷¿¡¼­ 2 Gy »ýÁ¸ ºÐȹÀº
0.3250¡¾0.0319¿´°í, hGSTK1 À¯ÀüÀÚ¸¦ ÀÌÀÔ½ÃŲ MCF-7 ¼¼Æ÷¿¡¼­ 2 Gy »ýÁ¸ ºÐȹÀº 0.4125¡¾0.0325¿´´Ù (p<0.05). ±×·¯³ª RT-PCR¿¡ ÀÇÇÑ hGSTK1 mRNA ºÐ¼®¿¡¼­´Â ¹æ»ç¼±·®, ºÐÇÒÁ¶»ç ¿©ºÎ, ¹æ»ç¼± Á¶»ç ÈÄ °æ°ú ½Ã°£¿¡ µû¸¥ ¹ßÇöÀÇ Â÷À̸¦ º¼ ¼ö ¾ø¾ú´Ù.
°á·Ð:
MCF-7
¼¼Æ÷ÁÖ¿¡¼­ hGSTK1ÀÇ °ú¹ßÇöÀº ¹æ»ç¼± °¨¼ö¼º¿¡ ¿µÇâÀ» ¹ÌÃļ­ MCF-7 ¼¼Æ÷ÀÇ »ýÁ¸ ºÐȹÀ» Áõ°¡½ÃÄ×´Ù°í º¼ ¼ö ÀÖÀ¸³ª ÀÌ¿¡ ´ëÇÑ Á¤È®ÇÑ ±âÀüÀ» ¾Ë±â À§Çؼ­´Â ´õ ¸¹Àº ¿¬±¸°¡ ÇÊ¿äÇÒ °ÍÀÌ´Ù.

Purpose: This study was conducted to assess the effects of x-irradiation on the expression of the novel glutathione S-transferase K1 gene. Materials and methods: Human glutathione S-transferase K1 (hGSTK1) DNA was purified and
ligated
to a
pcDNA3.1/Myc-His(£«) vector for the overexpression of hGSTK1 gene. MCF-7 cells were transfected with or without the recombinant hGSTK1 gene, and irradiated with 6 MV x-ray. After incubation of 14 days, cell survival was measured and compared. The
expression of hGSTK1 and the effect of x- irradiation on hGSTK1 expression were also estimated in MCF-7 cells transfected with or without the hGSTK1 gene by RT-PCR. Results: Following 2 to 12 Gy of x-irradiation, the cell survivals were
higher in
the MCF-7 cells transfected with the hGSTK1 gene than in those without transfection. Despite the higher cell survival in the hGSTK1-transfected cells, RT-PCR for hGSTK1 mRNA revealed no significant differences according to radiation dose,
fractionation,
and time after irradiation. Conclusion: The MCF-7 cells transfected with the hGSTK1 gene showed higher cell survival than those without transfection of the gene. The hGSTK1 gene might be associated with the radiosensitivity of MCF-7 cell
line and
further analysis should be needed.

Å°¿öµå

Glutathione S-Transferase K1; MCF-7 ¼¼Æ÷; À¯ÀüÀÚ ÀÌÀÔ; Glutathione S-Transferase K1; MCF-7 cell; Transfection;

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