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1/2±ÇÇüö/12Hyoung Cheol Kwon 3¾ç¹®½Ä/3Moon Sik Yang

Abstract

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ÇÑ °æ¿ì ¹æ»ç¼±Á¶»ç ´Üµ¶ÀÇ °æ¿ì º¸´Ù ¼¼Æ÷µ¶¼ºÀÇ Â÷ÀÌ´Â ¾î¶°Çϸç, ¶ÇÇÑ Áã ¼¶À¯À°Á¾¿¡¼­
µÎ ±º°£ÀÇ Á¾¾ç¼ºÀåÀÇ Áö¿¬ Á¤µµ¿¡ ¾î¶°ÇÑ Â÷ÀÌ°¡ Àִ°¡¸¦ °üÂûÇÏ°íÀÚ º» ¿¬±¸¸¦ ½ÃÇàÇÏ¿´
´Ù.
´ë»ó ¹× ¹æ¹ý : 2% º£Å¸Ä«·Îƾ À¯Á¦¸¦ 2 mg/mlÀ¸·Î ¸¸µç ´ÙÀ½ ´Ü°èÀûÀ¸·Î Èñ¼®ÇÏ¿© »ç
¿ëÇÏ¿´À¸¸ç, ¼¶À¯À°Á¾¼¼Æ÷¿Í Å»ý 5¡­6ÁÖÀÇ C3H/NÀÇ ½ÇÇèÁ㸦 ÀÌ¿ëÇÏ¿´´Ù. ¹æ»ç¼±Á¶»ç´Â 6
MV¼±Çü°¡¼Ó±â¸¦ ÀÌ¿ëÇÏ¿´°í, ¼¼Æ÷³» µ¶¼ºÀº Áã ¼¶À¯À°Á¾¼¼Æ÷ÀÇ »ýÁ¸À» °¨¼Ò½ÃÅ°´Â ´É·ÂÀ¸
·Î Æò°¡ÇÏ¿´À¸¸ç, º£Å¸Ä«·Îƾ 2 mg/mlÀ» ¹æ»ç¼±Á¶»ç 1½Ã°£ Àü ¼¶À¯À°Á¾¼¼Æ÷Áß¿¡ Á¢Ã˽ÃÄ×
´Ù. Á¾¾ç¼ºÀå Áö¿¬ ½ÇÇèÀ» À§ÇÏ¿© º£Å¸Ä«·Îƾ°ú ¹æ»ç¼±Á¶»ç º´¿ë±º(n=6)°ú ¹æ»ç¼±Á¶»ç ´Üµ¶
±º(n=5)À¸·Î ºÐ·ùÇÏ¿´À¸¸ç, º£Å¸Ä«·Îƾ 20 mg/kgÀ» ¹æ»ç¼±Á¶»ç 30ºÐÀü ¼¶À¯À°Á¾ÀÌ ÁýÁßµÈ
ÁãÀÇ º¹°­³» ÀÏȸ ÁÖ»çÇÏ¿´°í, ¹æ»ç¼±Á¶»ç·®Àº 20 Gy¸¦ ÁÖ¾ú´Ù. Á¾¾ç¿ëÀûÀº Àå°æ¡¿Àå°æ¡¿Àå
°æ/2 (§§) °ø½ÄÀ» »ç¿ëÇÏ¿´À¸¸ç, 2¡­3ÀÏ ¸¶´Ù ÃøÁ¤ÇÏ¿´´Ù.
°á°ú : ¼¶À¯À°Á¾¼¼Æ÷¿¡ º£Å¸Ä«·Îƾ 0.002, 0.02, 0.2, 2 mg/ml ³óµµ¾×À» 1½Ã°£ µ¿¾È Á¢ÃË
ÈÄ ¾òÀº °¢°¢ »ýÁ¸ºÐÀ²Àº 0.69¡¾0.07, 0.59¡¾0.08, 0.08¡¾0.008 ¹× 0.02¡¾0.006À̾ú´Ù. ±×¸®°í
¹æ»ç¼±Á¶»ç 1½Ã°£ Àü ¼¶À¯À°Á¾¼¼Æ÷¿¡ º£Å¸Ä«·Îƾ 2 mg/mlÀ» Á¢ÃËÇÑ ÈÄ Á¶»ç·® 2, 4, 6 ¹× 8
Gy¿¡¼­ ¾òÀº °¢°¢ÀÇ »ýÁ¸ºÐÀ²Àº 0.13¡¾0.05, 0.03¡¾0.005, 0.01¡¾0.002 ¹× 0.009¡¾0.0008À̾úÀ¸
¸ç ¹æ»ç¼±Á¶»ç ´Üµ¶±ºÀÇ °æ¿ì µ¿ÀÏ Á¶»ç·®¿¡¼­ ¾òÀº »ýÁ¸ºÐÀ²Àº °¢°¢ 0.66¡¾0.05, 0.40¡¾0.04,
0.11¡¾0.01 ¹× 0.03¡¾0.006À¸·Î ³ªÅ¸³µ´Ù(p<0.05). Á¾¾ç¼ºÀåÀÇ Áö¿¬Á¤µµ¸¦ ³ªÅ¸³»´Â ½ÇÇè¿¡¼­
¼¶À¯À°Á¾À» Áã¿¡ Á¢Á¾ÇÑ ÈÄ Á¾¾çÀÇ ¿ëÀûÀÌ 1,000§§¿¡ ´ÞÇÏ´Â ±â°£Àº º£Å¸Ä«·Îƾ º´¿ë±º°ú
¹æ»ç¼±Á¶»ç ´Üµ¶±º¿¡¼­ °¢°¢ 18ÀÏ°ú 19ÀÏ·Î ³ªÅ¸³µ´Ù(p>0.05).
°á·Ð : Áã ¼¶À¯À°Á¾¼¼Æ÷¿¡ º£Å¸Ä«·ÎƾÀ» Á¢ÃËÇÑ °æ¿ì ¼¼Æ÷µ¶¼ºÀÌ ³ªÅ¸³µÀ¸¸ç, º£Å¸Ä«·Îƾ
³óµµ Áõ°¡¿¡ µû¶ó ¼¼Æ÷ µ¶¼ºµµ Áõ°¡ÇÏ¿´´Ù. ±×¸®°í Áã ¼¶À¯À°Á¾¼¼Æ÷ÀÇ ¼¼Æ÷µ¶¼ºÀº º£Å¸Ä«·Î
ƾ º´¿ë±º¿¡¼­ ¹æ»ç¼±Á¶»ç ´Üµ¶±ºÀÇ °æ¿ì º¸´Ù ºÎ°¡ÀûÀ¸·Î Áõ°¡ÇÏ¿´À¸¸ç, µÎ ±º°£¿¡ Åë°èÇÐ
ÀûÀ¸·Î ÇöÀúÇÑ Â÷À̸¦ º¸¿´´Ù. ±×·¯³ª Áã ¼¶À¯À°Á¾ ¼ºÀå Áö¿¬Á¤µµ¿¡ À־ º£Å¸Ä«·Îƾ º´
¿ë±º°ú ¹æ»ç¼±Á¶»ç ´Üµ¶±º°£ÀÇ Åë°èÇÐÀûÀ¸·Î ¶Ñ·ÇÇÑ Â÷ÀÌ´Â ¾ø¾ú´Ù.

Purpose : To investigate whether combined beta-carotene with X-irradiation has more
enhanced radition response than X-irradiation or not, we performed a experiment about
in vitro cytotoxicity of beta-carotene and/or X-irradiation in the fibrosarcoma cells,
tumor growth delay of combined beta-carotene with/or X-irradiation in the mouse
fibrosarcoma.
Materials and Methods : 2% emulsion of beta-carotene was serially diluted and used.
X-irradiation was given by 6 MeV linear accelerator. The cytotoxicity of beta-carotene
in vitro was evaluated from clonogenic assay. To compare the cytotoxicity between
combined beta-carotene with X-irradiation and X-irradiation group, 2 mg/ml of
beta-carotene was contacted to fibrosarcoma (FSall) cells for 1 hour before
X-irradiation. For the tumor growth delay, single 20 Gy was given to FSall tumor
bearing C3H/N mice which was classified as beta-crotene with X-irradiation group
(n=6) and X-irradiation alone group (n=5). 0.2 ml of 20 mg/kg of beta-carotene were i.p.
injected to mice 30 minute before X-irradiation in the beta-crotene with X-irradiation
group. The tumor growth delay as the time which reach to 1,000§§ of tumor volume.
Results : (1) Cytotoxicity in vitro; 1) survival fraction at beta-carotene concentration
of 0.002, 0.02, 0.2 and 2 mg/ml were 0.69¡¾0.07, 0.59¡¾0.08, 0.08¡¾0.008 and 0.02¡¾0.006,
respectively. 2) each survival fraction at 2, 4, 6 and 8 Gy in the 2 mg/ml of
beta-carotene + X-irradiation group were 0.13¡¾0.05, 0.03¡¾0.005, 0.01¡¾0.002 and 0.009¡¾
0.0008, respectively. But each survival fraction at same irradiation dose in the
X-irradiation group were 0.66¡¾0.05, 0.40¡¾0.04, 0.11¡¾0.01 and 0.03¡¾0.006,
respectively(p<0.05). (2) The time which reach to 1,000§§ of tumor volume of
beta-carotene + X-irradiation group and X-irradiation alone group were 18, 19 days,
respectively(p<0.05).
Conclusion : The contact of beta-caroten to FSall cells showed mild cytotoxicity
which was increased according to concentration. The cytotoxicity of combined
beta-carotene with X-irradiation more increased than that of X-irradiation, additionaly.
And there was significant difference of cytotoxicity between two groups. But there were
no significant difference of the growth delay of fibrosarcoma between two groups.

Å°¿öµå

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