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ÀÎü ¾Ï¼¼Æ÷ÁÖ¿¡¼­ ¹æ»ç¼±°¨¼ö¼ºÀÇ ÁöÇ¥°£ÀÇ »óÈ£°ü°è Correlation Between the Parameters of Radiosensitivity in Human Cancer Cell Lines

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¹Ú¿ìÀ± (  ) 
Chungbuk National University

¹Î°æ¼ö (  ) 
Chungbuk National University
±è¿øµ¿ (  ) 
Chungbuk National University

Abstract

¸ñ Àû : ÀÓ»ó¿¡¼­ ¹ß»ýºóµµ°¡ ³ôÀº À§¼±¾Ï , Æó¼±¾Ï , ¸Á¸·¼¼Æ÷Á¾ , ÀڱðæºÎ ÆíÆò»óÇǾÏÀÇ 4 °¡Áö ÀÎü¾Ï¼¼Æ÷ÁÖ (MKN-45, PC-14, Y-79, HeLa)¸¦ ÀÌ¿ëÇÏ¿© ¹æ»ç¼±Á¶»çÈÄ ¼¼Æ÷»ýÁ¸ºÐȹ ¹× ¼¼Æ÷»ýÁ¸°î¼±ÀÇ ¸ð¾çÀ» °áÁ¤ÇÏ´Â ÁöÇ¥¸¦ ±¸ÇÏ°í ¹æ»ç¼±Á¶»çÈÄ ¼Õ»ó ȸº¹Á¤µµ¸¦
ÃøÁ¤ÇÏ¿© ÀÌµé ¿©·¯ ÁöÇ¥°£ÀÇ »ó°ü°ü°è ¿©ºÎ¸¦ ±¸¸íÇϱâ À§ÇÏ¿© º»½ÇÇèÀ» ½ÃÇàÇÏ¿´´Ù .

´ë»ó ¹× ¹æ¹ý : °¢ ¼¼Æ÷ÁÖÀÇ ¹æ»ç¼±°¨¼ö¼ºÀ» º¸±â À§ÇÏ¿© 1, 2, 3, 5, 7 ¹× 10Gy ÀÇ ¹æ»ç¼±À» 1 ȸ Á¶»çÇÏ¿´°í ¹æ»ç¼±Á¶»çÈÄ ÁØÄ¡»ç¼Õ»ó ȸº¹Á¤µµ¸¦ º¸±â À§ÇÏ¿© 5Gy ¾¿ 2 ȸÀÇ ¹æ»ç¼±Á¶»ç¸¦ 0,1, 2, 3, 4, 6 ¹× 24 ½Ã°£ °£°ÝÀ¸·Î ½ÃÇàÇÏ¿´´Ù . ¼¼Æ÷ÀÇ »ýÁ¸ºÐȹÀº
Sperman-K?ber ¹æ¹ýÀ¸·Î ¼¼Æ÷Áý¶ôÇü¼º´É·ÂÀ» ÃøÁ¤ÇÏ¿© »êÃâÇÏ¿´À¸¸ç »ýÁ¸°î¼±ÀÇ ¼öÇÐÀû ºÐ¼®Àº linear-quadratic(LQ), multitarget-single hit(MS) ¸ðÇü°ú mean inactivation dose( )¸¦ ÀÌ¿ëÇÏ¿´´Ù .

°á °ú : ¹æ»ç¼±Á¶»çÈÄÀÇ ¼¼Æ÷»ýÁ¸ ½ÇÇè°á°ú 2Gy ¿¡¼­ÀÇ ¼¼Æ÷»ýÁ¸ºÐȹ (SF2)Àº 0.174 ¿¡¼­ 0.85 ±îÁö ´Ù¾çÇÏ°Ô ³ªÅ¸³µÀ¸¸ç Y-79 ´Â À¯ÀÇÇÏ°Ô ³·Àº SF2 ¸¦ , PC-14 ´Â ³ôÀº SF2 ¸¦ ³ªÅ¸³»¾ú´Ù (p<0.05, t -test). LQ model ·Î ºÐ¼®ÇÑ ¹æ»ç¼± ¼¼Æ÷»ýÁ¸°î¼±ÀÇ ºÐ¼®°á°ú
Y-79, MKN-45, HeLa, PC-14 ¿¡¼­ ¥á°¡ °¢°¢ 0.603, 0.356, 0.275, 0.102 À̾ú°í ¥â´Â °¢°¢ 0.005, 0.016, 0.025, 0.027 À̾ú´Ù . MS model ·Î ºÐ¼®ÇÑ °á°ú´Â Y-79, MKN-45, HeLa, PC-14 ¿¡¼­ Do °¡ °¢°¢ 1.59, 1.84, 1.88, 2.52 ¿´°í n Àº 0.97, 1.46, 1.52, 1.69 ¸¦ º¸¿´´Ù. ÇÑÆí Gauss-Laguerre ¹æ¹ýÀ¸·Î °è»êÇÑ ´Â Y-79, MKN-45, HeLa, PC-14 ¿¡¼­ °¢°¢ 1.62, 2.37, 2.61, 3.95 ¿´´Ù . SF2 °¡ °¨¼ÒÇÔ¿¡ µû¶ó ¥á°ªÀº Áõ°¡ÇÏ¿´°í Do, °ªÀº °¨¼ÒÇÏ¿´À¸¸ç À̵鰣ÀÇ Pearson »ó°ü°è¼ö´Â °¢°¢ -0.953, 0.993, 0.999 ¿´´Ù (p<0.05). ºÐÇÒÁ¶»ç¿¡ ÀÇÇÑ ÁØÄ¡»ç¼Õ»ó ȸº¹Á¤µµ´Â ¾à 4 ½Ã°£ ³»¿Ü¿¡ Æ÷È­»óÅ¿¡ µµ´ÞÇÏ¿´À¸¸ç Æ÷È­»óÅÂÀÇ recovery ratio(RR)´Â 2 ¿¡¼­ 3.79 »çÀÌ¿´´Ù . RR Àº ¹æ»ç¼±°¨¼ö¼ºÀÇ ÁöÇ¥ÀÎ SF2, ¥á,¥â, Do, °ú Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÑ »ó°ü°ü°è¸¦ ³ªÅ¸³»Áö ¾Ê¾Ò´Ù .

°á ·Ð : º» ¿¬±¸ÀÇ °á°ú ³×°¡Áö ÀÎü»óÇǾϼ¼Æ÷ÁÖÀÇ ³»ÀçÀû ¹æ»ç¼±°¨¼ö¼ºÀº ¼­·Î »óÀÌÇÏ¿´À¸¸ç Y-79 °¡ °¡Àå ¹Î°¨ÇÏ¿´°í , MKN-45 ¿Í HeLa ´Â °¢°¢ ÁߵÀÇ ¹æ»ç¼±°¨¼ö¼ºÀ» ³ªÅ¸³ÂÀ¸¸ç PC-14 ´Â ¹æ»ç¼±°¨¼ö¼ºÀÌ °¡Àå ³·¾Ò´Ù . ÀÌ¿Í°°Àº °¨¼ö¼ºÀÇ Â÷ÀÌ´Â SF2, ¥á, Do
¿Í ÀÇ Â÷ÀÌ·Î ³ªÅ¸³µÀ¸¸ç À̵鰣¿¡´Â ¹ÐÁ¢ÇÑ »ó°ü°ü°è¸¦ ³ªÅ¸³»¾ú´Ù . ¹æ»ç¼±¿¡ ÀÇÇÑ ÁØÄ¡»ç¼Õ»ó ȸº¹·ÂÀº MKN-45 ¿Í HeLa ¿¡¼­ ³ô°Ô ³ªÅ¸³µ°í ȸº¹·Â°ú ¹æ»ç¼±°¨¼ö¼º°ú´Â ¹«°üÇÏ¿´´Ù . °¢ ¾Ï¼¼Æ÷ÁÖ¿¡ µû¸£´Â ÀÌ¿Í°°Àº ÁöÇ¥µéÀº ÇâÈÄ ¹æ»ç¼±Ä¡·á È¿°ú¸¦ ³ôÀ̱â À§ÇÑ ¹æ»ç¼±»ý¹°ÇÐ
½ÇÇèÀÇ ±âÃÊ ÀÚ·á·Î¼­ ÀÌ¿ëµÇ¾î Áú ¼ö ÀÖÀ» °ÍÀÌ´Ù .

Purpose: We conducted clonogenic assay using human cancer cell lines (MKN-45, PC-14, Y-79, HeLa) to investigate a correlation between the parameters of radiosensitivity.

Materials and Methods: Human cancer cell lines were irradiated with single doses of 1, 2, 3, 5, 7 and 10Gy for the study of radiosensitivity and sublethal damage repair capacity was assessed with two fractions of 5Gy separated with a time interval
of 0,1, 2, 3, 4, 6 and 24 hours. Surviving fraction was assessed with clonogenic assay using Sperman-K?ber method and mathematical analysis of survival curves was done with linear-quadratic (LQ), multitarget-single hit(MS) model and mean inactivation
dose( D).

Results: Surviving fractions at 2Gy(SF2) were variable among the cell lines, ranged from 0.174 to 0.85. The SF2 of Y-79 was lowest and that of PC-14 was highest(p<0.05, t-test). LQ model analysis showed that the values of ¥á for Y-79, MKN-45, HeLa and PC-14 were 0.603, 0.356, 0.275 and 0.102 respectively, and those of ¥â were 0.005, 0.016, 0.025 and 0.027 respectively. Fitting to MS model showed that the values of Do for Y-79, MKN-45, HeLa and PC-14 were 1.59, 1.84, 1.88 and 2.52 respectively, and those of n were 0.97, 1.46, 1.52 and 1.69 respectively. The s calculated by Gauss-Laguerre method were 1.62, 2.37, 2.61 and 3.95 respectively. So the SF2 was significantly correlated with ¥á, Do and . Their Pearson correlation coefficiencics were -0.953 and 0.993, 0.999 respectively(p<0.05). Sublethal damage repair was saturated around 4 hours and recovery ratios (RR) at plateau phase ranged from 2 to 3.79. But RR was not correlated with SF2, ¥á, ¥â, Do, D.

Conclusion: The intrinsic radiosensitivity was very different among the tested human cell lines. Y-79 was the most sensitive and PC-14 was the least sensitive. SF2 was well correlated with ¥á, Do, and . RR was high for MKN-45 and HeLa but had nothing to do with radiosensitivity parameters. These basic parameters can be used as baseline data for various in vitro radiobiological experiments.

Å°¿öµå

Radiosensitivity; Sublethal damage repair; MKN- 45; PC- 14; Y- 79; HeLa

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