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ÈòÁãÀÇ ´ëÀåÁ¡¸·¿¡ Paclitaxel(Taxol)°ú ¹æ»ç¼±Á¶»çÀÇ È¿°ú Effect of the Paclitaxel and Radiation on the Large Bowel Mucosa of the Rat

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ÀÌ°æÀÚ/Kyung Ja Lee

Abstract

¸ñ Àû : Paclitaxel(Taxol)Àº ¹Ì¼Ò°üÀÇ ÁýÇÕÀ» ÃËÁø½ÃÅ°°í ºÐÇظ¦ ¹æÁöÇÏ¿© ¼¼Æ÷ÁÖ±â Áß
À¯»çºÐ¿­À» Á¤Áö½ÃÅ´À¸·Î½á ¹æ»ç¼±Á¶»ç¿Í º´¿ëÇÒ °æ¿ì ¹æ»ç¼±°¨ÀÛÁ¦·Î¼­ÀÇ °¡´É¼ºÀÌ ÀÖ´Ù.
ÈòÁãÀÇ ´ëÀåÁ¡¸·¿¡¼­ paclitaxelÀÌ ¹æ»ç¼±ÀÇ È¿°ú¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ÆľÇÇϱâ À§ÇÏ¿© º» ½ÇÇè
À» ½ÃµµÇÏ¿´´Ù.
´ë»ó ¹× ¹æ¹ý : ½ÇÇ豺Àº ¼¼±ºÀ¸·Î ³ª´©¾î paclitaxel ´Üµ¶±ºÀº paclitaxel 10§·/§¸À» º¹°­
³» 1ȸ ÁÖÀÔÇÏ¿´°í, ¹æ»çÁ¶»ç ´Üµ¶±ºÀº 8§í¸¦ Àüº¹ºÎ¿¡ ´ÜÀÏÁ¶»çÇÏ¿´À¸¸ç, paclitaxel°ú ¹æ»ç
¼± º´¿ë±ºÀº paclitaxel(10§·/§¸)À» º¹°­³» ÁÖÀÔ ÈÄ 24½Ã°£¿¡ ¹æ»ç¼±Á¶»ç ´Üµ¶±º°ú µ¿ÀÏÇÑ ¹æ
¹ýÀ¸·Î Á¶»çÇÏ¿´´Ù. ½ÇÇè¿Ï·á ÈÄ ´ëÀåÁ¡¸·¿¡¼­ À¯»çºÐ¿­¼ö, apoptosis¿Í ±âŸ Á¡¸·ÀÇ º¯È­¸¦
½Ã°£º°·Î(6½Ã°£¡­5ÀÏ) ºñ±³°üÂûÇÏ¿´´Ù.
°á °ú : Paclitaxel ÁÖÀԽà ´ëÀåÁ¡¸·¿¡¼­ À¯»çºÐ¿­ÀÇ ºóµµ´Â Áõ°¡µÇÁö ¾Ê¾Ò°í apoptosis´Â
ÁÖÀÔ ÈÄ 24½Ã°£¿¡ °üÂûÇÒ ¼ö ÀÖ¾úÀ¸¸ç, ¼Ò¼öÆ÷Çü¼º, ºñÁ¤Çü¼º ¹× ¹è»ó¼¼Æ÷ÀÇ °¨¼Ò´Â
paclitaxel ÁÖÀÔ ÈÄ 6½Ã°£ºÎÅÍ 3ÀϱîÁö ½ÉÇÏ°Ô º¸¿´´Ù. ¹æ»ç¼±Á¶»ç ´Üµ¶½Ã aoptosis´Â 6½Ã°£
°ú 24½Ã°£¿¡ °üÂûÇÒ ¼ö ÀÖ¾úÀ¸¸ç, ´ëÀåÁ¡¸·ÀÇ ¼Ò¼öÆ÷Çü¼º, ºñÁ¤Çü¼º ¹× ¹è»ó¼¼Æ÷ÀÇ °¨¼Ò´Â
24½Ã°£¿¡ º¸À̱⠽ÃÀÛÇÏ¿© 3ÀÏ¿¡ ½ÉÇÏ°Ô º¸¿´´Ù. Paclitaxel ÁÖÀÔ ÈÄ 24½Ã°£¿¡ ¹æ»ç¼±Á¶»çÇÏ
¿© apoptosis´Â 3ÀÏ¿¡ ³ªÅ¸³µÀ¸¸ç ¼Ò¼öÆ÷Çü¼º, ºñÁ¤Çü¼º ¹× ¹è»ó¼¼Æ÷ÀÇ °¨¼Ò´Â 6½Ã°£ºÎÅÍ 3
ÀϱîÁö ³ªÅ¸³µ´Ù. Paclitaxel°ú ¹æ»ç¼±ÀÇ º´¿ë±º¿¡¼­ ¹æ»ç¼±Á¶»ç ´Üµ¶±º¿¡ ºñÇÏ¿© apoptosis
´Â Áõ°¡µÇÁö ¾Ê¾ÒÀ¸³ª, ¼Ò¼öÆ÷Çü¼º, ºñÁ¤Çü¼º ¹× ¹è»ó¼¼Æ÷ÀÇ °¨¼Ò´Â 6½Ã°£°ú 24½Ã°£¿¡ Áõ°¡
µÇ¾úÀ¸¸ç(P<0.05), ÀÌ°ÍÀº ¹æ»ç¼±°ú paclitaxel °¢°¢ÀÇ ¼¼Æ÷µ¶¼ºÀÇ Ã·°¡È¿°ú°¡ ÀÖ¾ú´Ù.
°á ·Ð : ÈòÁã ´ëÀå¿¡¼­ paclitaxelÀº À¯»çºÐ¿­¿¡ ¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê¾ÒÀ¸³ª, ¹æ»ç¼±Á¶»ç¿¡ ÀÇ
ÇÑ ¼¼Æ÷¼Õ»ó°ú µ¿ÀÏÇÑ º¯È­·Î apoptosis, ¼Ò¼öÆ÷Çü¼º, ºñÁ¤Çü¼º ¹× ¹è»ó¼¼Æ÷ÀÇ °¨¼Ò¸¦ À¯¹ß
ÇÏ¿´´Ù. Paclitaxel°ú ¹æ»ç¼±Á¶»ç º´¿ë±º¿¡¼­ ´ëÀåÁ¡¸·¿¡ ¼Ò¼öÆ÷Çü¼º, ºñÁ¤Çü¼º ¹× ¹è»ó¼¼Æ÷
°¨¼Ò°¡ ¹æ»ç¼±Á¶»ç ´Üµ¶±º¿¡ ºñÇÏ¿© ÇöÀúÈ÷ Áõ°¡µÇ¾î paclitaxelÀº ¹æ»ç¼±¿¡ ´ëÇÏ¿© ÷°¡È¿
°ú°¡ ÀÖ¾ú´Ù.

Purpose : Paclitaxel is a chemotherapeutic agent with a potent microtubule stabilizing
activity that arrests mitosis at G2-M phase of cell cycle which is the most
radiosensitive period. Therefore paclitaxel is considered as a cell cycle-specific
radiosensitizer. This study investigates the effect of paclitaxel on the radiation response
of the normal large bowel mucosa of the rat.
Material and Methods : The rate were divided into the three groups i.e., single
intraperitoneal infusion of paclitaxel (10 §·/§¸), a single fraction of irradiation (8 §í,
x-ray) to the whole abdomen, and a combination of irradiation (8 §í, x-ray) given 24
hours after paclitaxel infusion. The histological changes as well as kinetics of mitotic
arrest and apoptosis were evaluated on the large bowel mucosa at 6 hours, 1 day, 3
days and 5 days after treatment with paclitaxel alone, radiation alone and combination of
paclitaxel and radiation.
Results : The incidence of the mitotic arrest was not increased by paclitaxel infusion.
The apoptosis appeared in 24 hours after paclitaxel infusion, and the histopathologic
changes such as vesiculation, atypia and reduction of the goblet cell of the mucosa of
the large bowel were demonstrated during the period from 6 hours to 3 days after, and
returned to normal in 5 days after paclitaxel infusion. In irradiated group, the apoptosis
was increased in 6 and 24 hours after irradiation, and the histopathologic changes of the
mucosa were appeared in 24 hours and markedly increased in 3 days and returned to
normal in 5 days. In combined group of irradiation and paclitaxel infusion, the apoptosis
was appeared in 3 days and the histopathologic changes appeared during the period from
6 hours to 3 days after infusion. On the basis of the incidence of apoptosis and the
degree of the histopathologic changes of the large bowel mucosa, there seemed to be
additive effect by paclitaxel on radiation rather than sensitizing effect.
Conclusion : The histopathological changes of large bowel mucosa in combined group
compared to radiation alone group suggested an additive effect of paclitaxel on radiation
response in the large bowel of rat.

Å°¿öµå

Paclitaxel; ¹æ»ç¼±Á¶»ç; ´ëÀå; À¯»çºÐ¿­Á¤Áö; ¾ÆÆ÷ÇÁÅä½Ã½º; Paclitaxel; Radiation; Large bowel; Mitotic arrest; Apoptosis;

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