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MKN-45¼¼Æ÷¿¡¼­ ¼ÓÁß¼ºÀÚ¿Í ¿Â¿­Ä¡·áÀÇ ¿î¼­ ¹× °£°Ý¿¡ µû¸¥ º´¿ëÈ¿°ú The Combined Effect of Fast Neutron and Hyperthermia according to the Sequence and Interval in MKN-45 Cells

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¹Ú¿ìÀ± (  ) 
Chungbuk National University

·ù¼º·Ä (  ) 
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Abstract

¸ñ Àû : ¿Â¿­Ä¡·á´Â ¿¢½º¼± ¶Ç´Â °¨¸¶¼± µî LET °¡ ³·Àº ¹æ»ç¼±¿¡ ´ëÇÑ ¼¼Æ÷ ¹× Á¶Á÷¿¡
¼­ÀÇ ¹ÝÀÀÀ» Áõ°­½Ãų ¼ö ÀÖÀ½ÀÌ ÀÌ¹Ì Àß ¾Ë·ÁÁ® ÀÖ´Ù. ±×·¯³ª ´Ù¸¥ Á¾·ùÀÇ ¹æ»ç¼±°ú ¿Â¿­
Ä¡·áÀÇ »óÈ£ÀÛ¿ë¿¡ ´ëÇؼ­´Â ¿¬±¸°¡ ¹Ì¹ÌÇÑ ½ÇÁ¤ÀÌ´Ù. µû¶ó¼­ ÀúÀÚµéÀº ¼ÓÁß¼ºÀÚ¿Í ¿Â¿­Ä¡
·áÀÇ ¼ø¼­ ¹× ½Ã°£°£°Ý¿¡ µû¸¥ º´¿ëÈ¿°ú¸¦ ÆľÇÇÏ°íÀÚ ÀÌ ¿¬±¸¸¦ ½ÃÇàÇÏ¿´´Ù.
Àç·á ¹× ¹æ¹ý : »ç¶÷ À§¾Ï¼¼Æ÷ÁÖÀÎ MKN-45 ¼¼Æ÷¿¡¼­ 1.5§í ÀÇ Áß¼ºÀÚÁ¶»ç ÀüÈÄ °¢ 6, 4,
2, 0(5ºÐ) ½Ã°£ °£°ÝÀ¸·Î 41¡É ¶Ç´Â 43¡É ¿¡¼­ 30ºÐ°£ÀÇ ¿Â¿­Ä¡·á ½ÃÇàÇÏ¿© ¼¼Æ÷»ýÁ¸À²À» Ãø
Á¤ÇÏ¿´´Ù.
°á °ú : MKN-45 ÀÇ D0 ¿Í n Àº °¢°¢ 0.8§í ¿Í 2.5 À̾ú°í, 1.5§í ¿¡¼­ÀÇ
»ýÁ¸ºÐȹÀº 0.36(¡¾0.34) À̾ú´Ù. ½Ã°£ °£°Ý¿¡ µû¸¥ »óÈ£ÀÛ¿ë·ÂÀº ´ëºÎºÐ 1 °ú 2 »çÀÌ¿´À¸³ª,
41¡É ÀÇ ¿Â¿­Ä¡·áÈÄ 4 ¶Ç´Â 6½Ã°£¿¡ ½ÃÇàÇÑ Áß¼ºÀÚÁ¶»ç¿¡¼­´Â »óÈ£ÀÛ¿ë·ÂÀÌ °¢°¢ 3.0 °ú 2.7
À̾ú´Ù.
°á ·Ð : ¼ÓÁß¼ºÀÚ¿Í ¿Â¿­Ä¡·áÀÇ º´¿ëÈ¿°ú´Â ÁÖ·Î »ó°¡Àû(additive) À̳ª, ¾à¿Â¿­Ä¡·á(41¡É,
30ºÐ) °¡ 4 ¶Ç´Â 6½Ã°£ Àü¿¡ ½ÃÇàµÈ °æ¿ì ÈÄ¼Ó Áß¼ºÀÚÁ¶»ç¿¡ ´ëÇÑ ³»¼ºÀÌ À¯¹ßµÉ ¼öÀÖ´Ù.

Purpose : It has been well established that the response of cells and tissues to low
LET radiations (X- or gamma-ray) can be enhanced by combining with hyperthermia.
However, there has been relatively little work of hyperthermia on the possible
modification of either cellular or tissue responses to other types of radiation. So, we
investigated the combined effect of fast neutron irradiation and hyperthermia according
to the sequence and time interval of the two.
Materials and Methods : In MKN-45 cells, a human stomach cancer cell line,
surviving fractions were measured according to the sequential treatment of 6, 4, 2, 0
hour-interval for fast neutron irradiation (1.5 §í) combined with hyperthermia (41¡É for
30 min or 43¡É for 30 min).
Results : D0 and n of MKN-45 for neutron were 0.8 §í and 2.5,
respectively. The surviving fraction by 1.5 §í of neutron was 0.36¡¾0.34. Interacting
powers were mostly ranged between 1 and 2, but they were 3.0 and 2.7, respectively for
hyperthermia (41¡É for 30 min) followed by neutron irradiation 6 and 4 hours later.
Conclusion : The combined of effect of fast neutron (1.5 §í) and hyperthermia (41¡É
or 43¡É for 30min) is largely independently additive. Preceding mild hyperthermia (41¡É
for 30 min) 4 or 6 hours before neutron may cause decreased sensitivity to subsequent
neutron irradiation.

Å°¿öµå

MKN-45; ¼ÓÁß¼ºÀÚ; ¿Â¿­Ä¡·á; º´¿ë¼ø¼­; º´¿ë°£°Ý; MKN-45; Fast neutron; Hyperthermia; Sequence; Interval;

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