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ÃÖ¿µ¹Î/Young Min Choi ÀÌÁö½Å*/Á¶Èï·¡/Ji Shin Lee*/Heung Lae Cho

Abstract

¸ñÀû: ¹æ»ç¼±¿¡ ÀÇÇÑ ±Þ¼º ¼Õ»óÀ¸·Î ¼ÒÀå À½¿Í¿¡¼­ ¹ß»ýµÇ´Â ¼¼Æ÷°í»ç¿Í À¯»çºÐ¿­»çÀÇ ¹ß»ý Á¤µµ¸¦ ½Ã°£ °æ°ú¿¡µû¶ó¼­ Á¶»çÇÏ°íÀÚ ÇÏ¿´´Ù. ´ë»ó ¹× ¹æ¹ý: ¿õ¼º 200¡­250 g Sprague Dawley Á㸦 ´ë»óÀ¸·Î 6 MV ¼±Çü°¡¼Ó±â·Î 2 Gy Àü½Å ¹æ»ç¼±Á¶»ç¸¦ ÇÑ
ÈÄ, 2,
4, 8, 24, 48½Ã°£¿¡ Èñ»ýÇÏ¿´´Ù. ¼ÒÀå À½¿Í´ç Æò±Õ ¼¼Æ÷°í»ç ¼ö¿Í À¯»çºÐ¿­ ÁßÀÎ ¼¼Æ÷ ¼öÀÇ Æò±ÕÀ» Á¤»ó ´ëÁ¶±º°ú ¹æ»ç¼±Á¶»ç ÈÄ ½Ã°£´ëº°·Î ÃøÁ¤ÇÏ¿´´Ù. ¼¼Æ÷°í»ç°¡ °¡Àå ÇöÀúÇÏ¿´´ø ½Ã°£´ë¸¦ ´ë»óÀ¸·Î In Situ End Labeling (ISEL) ¹ýÀ¸·Î ¿°»öÇÏ¿© Ç츶Åå½Ç¸°
¿¡¿ÀÁø
¿°»ö¹ý°ú ºñ±³ÇÏ¿´´Ù. °á°ú: À½¿Í´ç ¼¼Æ÷°í»çÀÇ Æò±Õ ºóµµ´Â Á¤»ó ´ëÁ¶±º¿¡¼­ 0.14¿´°í ¹æ»ç¼±Á¶»ç ÈÄ 2, 4, 8, 24, 48½Ã°£¿¡ °¢°¢ 1.43, 3.19, 1.15, 0.26, 0.17·Î, ¹æ»ç¼±Á¶»ç ÈÄ 4½Ã°£ °æ¿¡ °¡Àå ¸¹ÀÌ Áõ°¡µÇ¾ú´Ù°¡ Á¡Â÷ °¨¼ÒµÇ¾î 24½Ã°£¿¡ Á¤»óÀ¸·Î
ȸº¹µÇ¾ú´Ù.
Á¤»ó ´ëÁ¶±º¿¡¼­ 1.29¿´´ø À½¿Í´ç À¯»çºÐ¿­ ¼¼Æ÷ ¼öÀÇ Æò±ÕÀº ¹æ»ç¼±Á¶»ç ÈÄ 2, 4, 8, 24, 48½Ã°£¿¡ °¢°¢ 0.56, 0.47, 0.23, 0.65, 1.19·Î ÃøÁ¤µÇ¾î¼­, ¹æ»ç¼±Á¶»ç ÈÄ 8½Ã°£±îÁö °¨¼ÒµÇ¾ú´Ù°¡ 48½Ã°£ °æ¿¡ Á¤»óÀ¸·Î ȸº¹µÇ¾ú´Ù. ¼¼Æ÷°í»çÀÇ ¹ß»ýÀÌ À¯»çºÐ¿­ ¼¼Æ÷
¼öÀÇ
°¨¼Òº¸´Ù º¯È­ÀÇ Á¤µµµµ Å©°í, Á¶±â¿¡ ¹ß»ýµÇ¾ú´Ù. ISEL¹ý¿¡ ÀÇÇÑ ¼¼Æ÷°í»çÀÇ °ËÃâÀº ¹ß»ö ½Ã°£ÀÇ Á¶°Ç¿¡ µû¶ó¼­ À§¾ç¼ºÀÌ ¹ß»ýµÇ¾ú´Ù. °á·Ð: ¹æ»ç¼±¿¡ ÀÇÇÑ ¼ÒÀåÀÇ ±Þ¼º ¼Õ»óÀ¸·Î À¯¹ßµÇ´Â ¼¼Æ÷ »ç¸ÁÀº ¹æ»ç¼±Á¶»ç ÈÄ ´ë°³ 24¡­48½Ã°£ ³»¿¡ Á¤»óÄ¡·Î
ȸº¹µÇ¾ú°í,
À¯»çºÐ¿­»çº¸´Ù´Â ¼¼Æ÷°í»ç°¡ ´õ Áß¿äÇÑ ¿ªÇÒÀ» ÇÏ´Â °ÍÀ¸·Î »ý°¢µÈ´Ù.

Purpose: We investigated the temporal alterations of apoptosis and mitotic death following irradiation in the rat's small intestinal crypts. Materials and methods: Male Sprague-Dawley rats were irradiated 2 Gy by 6 MV linear
accelerator
and sacrified at 2, 4, 8, 24, 48 hours after irradiation. The mean numbers of the apoptotic cells and mitotic cells per their small intestinal crypts were measured in the unirradiated control and irradiated groups. To compare with H & E staining,
ISEL
(In Situ End Labelling) were performed in the group having the highest apoptotic count. Results: The mean number of the apoptosis per crypt in the control group was 0.14 and those at 2, 4, 8, 24, 48 hours after irradiation were 1.43, 3.19,
1.15,
0.26, 0.17, respectively. So the apoptosis development was increased upto 4 hours and then normalized around 24 hours following irradiation. The mean number of the mitotic cells per crypt in the control group was 1.29 and those at 2, 4, 8, 24, 48
hours
after irradiation were 0.56, 0.47, 0.23, 0.65, 1.19, respectively. The mitotic cell counts following irradiation was decreased to 8 hours and recovered to the normal level about 48 hours. So the increment of apoptotic cell count was occurred
earlier and
more remarkable than the decrement of mitotic cell count after irradiation. According to the staining time, false positivity was found in the ISEL staining. Conclusions: The cell death in the small intestinal crypt developed by acute
radiation
damage was usually decreased to the normal level within 24¡­48 hours after irradiation and the apoptosis was thought to be more important process than the mitotic death.

Å°¿öµå

¹æ»ç¼±; ¼ÒÀå; ¼¼Æ÷°í»ç; À¯»çºÐ¿­; Radiation; Small Intestine; Apoptosis; Mitosis;

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