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¹é¼­ °£¿¡¼­ ¹æ»ç¼±Á¶»ç¿¡ ÀÇÇÑ Apoptosis¿Í Cytokine ¹ßÇö°úÀÇ °ü°è The Relationship between Radiation-Induced Apoptosis and theExpression of Cytokines in the Rat's Liver

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Abstract

¸ñ Àû : ¹é¼­ÀÇ °£¿¡¼­ ³ªÅ¸³ª´Â ¹æ»ç¼±Á¶»ç¿¡ ÀÇÇÑ Á¶Á÷¼Õ»ó¿¡¼­ IL-1, IL-4, IL-6, TNF µîÀÇ cytokine°ú apoptosis¿ÍÀÇ »ó°ü°ü°è¸¦ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù.
´ë»ó ¹× ¹æ¹ý : ¹é¼­ÀÇ Àü½Å¿¡ 8 GyÀÇ ¹æ»ç¼±Á¶»ç ÈÄ °¢ 1ÀÏ, 3ÀÏ, 5ÀÏ, 7ÀÏ, 14ÀÏ¿¡ °£ Á¶Á÷ÀÇ º¯È­¸¦ Çö¹Ì°æÀ¸·Î °üÂûÇÏ°í, apoptosisÀÇ ¹ßÇöºóµµ¸¦ È®ÀÎÇÏ¿´À¸¸ç, IL-1, IL-4, IL-6 ¹× TNF µîÀÇ cytokine¿¡ ´ëÇؼ­ ¸é¿ªÁ¶Á÷È­Çп°»ö¹æ¹ý°ú, °£ Á¶Á÷°ú Ç÷¾×¿¡¼­ÀÇ
IL-6ÀÇ
»ý¹°ÇÐÀû È°¼ºµµ ÃøÁ¤ ¹× ¹æ»ç¼± ¸é¿ªÃøÁ¤ µîÀÇ ½ÇÇèÀ» ÇÏ¿´´Ù.
°á °ú : ¹æ»ç¼±Á¶»ç¿¡ ÀÇÇÑ °£ ¼Õ»óÀº ±¤ÇÐÇö¹Ì°æ ¼Ò°ß»ó ¹æ»ç¼±Á¶»ç ÈÄ 1ÀϺÎÅÍ °üÂûµÇ¾î, 3ÀÏ°ú 5ÀÏ¿¡ ¿°Áõ¼¼Æ÷ÀÇ Ä§À±°ú ÇÔ²² °¡Àå ½ÉÇÏ°Ô ³ªÅ¸³µ°í, 7ÀÏ ÀÌÈĺÎÅÍ´Â ¼¶À¯È­°¡ ½ÃÀ۵Ǿú´Ù. ApoptosisÀÇ ¹ßÇöºóµµ´Â ±¤ÇÐÇö¹Ì°æ ¼Ò°ß°ú in situ detection method
¸ðµÎ¿¡¼­
¹æ»ç¼±Á¶»ç ÈÄ 1ÀÏ¿¡ °¡Àå ³ô°Ô ³ªÅ¸³µ´Ù. ¸é¿ªÁ¶Á÷È­ÇÐ ¿°»ö ¼Ò°ß»ó, IL-1°ú TNFÀÇ ¹ßÇöÀº Á¶»ç ÈÄ 1ÀÏ°ú 3ÀÏ¿¡ º¸¿´°í, IL-4´Â ¸ðµç ±º¿¡¼­ ¹ßÇöµÇÁö ¾Ê¾Ò´Ù. IL-6´Â ¹æ»ç¼±Á¶»ç ÈÄ 1ÀÏ°ú 3ÀÏ¿¡ °­¾ç¼ºÀ¸·Î ³ªÅ¸³­ ÈÄ Á¡Â÷ °¨¼ÒÇÏ¿´°í, °£ Á¶Á÷°ú Ç÷¾×¿¡¼­ÀÇ
IL-6ÀÇ
»ý¹°ÇÐÀû È°¼ºµµ¿Í ¹æ»ç¼±¸é¿ªÃøÁ¤¿¡¼­µµ ¹æ»ç¼±Á¶»ç ÈÄ 1ÀÏ¿¡ °¡Àå ³ô°í ÀÌÈÄ Á¡Â÷ °¨¼ÒÇÏ¿´´Ù.
°á ·Ð : °£¿¡ ¹æ»ç¼±Á¶»ç¸¦ ½ÃÇàÇÑ °á°ú IL-1, IL-6 ¹× TNF¿Í °°Àº cytokineÀÇ ¹ßÇöÀÌ Áõ°¡µÇ¾úÀ¸¸ç, À̵é cytokineÀÇ ºÐºñ°¡ apoptosis¸¦ À¯µµÇÔÀ¸·Î½á apoptosis°¡ ¹æ»ç¼±Á¶»ç¿¡ ÀÇÇÑ °£ ¼Õ»ó¿¡ Áß¿äÇÑ ±âÀüÀÇ Çϳª·Î ÀÛ¿ëÇÒ °ÍÀ¸·Î »ý°¢µÈ´Ù.

Purpose : To determine the role of cytokines in the apoptosis of rat's liver following irradiation.
Materials and Methods : Sprague-Dawley rats were irradiated to entire body with a single dose of 8 Gy. The rats were divided into 5 groups according to the sacrifice day after irradiation. The liver and blood after 1, 3, 5, 7, and 14 days
irradiation
were sampled for evaluation of mechanism of apoptosis and role of cytokine in relation to radiation-induced tissue damage. The study was composed of microscopic evaluation of liver tissue, in situ detection method for apoptosis,
immunohistochemical
stain of IL-1, IL-4, IL-6 and TNF, bioassay and radioimmunoassay of IL-6 in liver tissue and blood.
Results : Radiation-induced liver damage was noted from first day of radiation, and most severe parenchymal damage associated with infiltration of chronic inflammatory cells was seen in the groups of 5 days after radiation. A number of apoptosis
were
observed 1 day after radiation on both light microscope and in situ method. Afterwards, the number of apoptosis was gradually diminished. On immunohistochemical study, IL-1 and TNF were expressed 1, 3 days after radiation, but not expressed after
that.
IL-4 was not expressed in the entire groups. IL-6 was expressed with strong positivity in 1, 3 days after radiation. Bioassay and RIA of IL-6 in liver tissue and blood showed the highest value in 1 day after radiation, and the value is diminished
after
then.
Conclusion : Apoptosis seemed to be the important mechanism of radiation-induced liver damage, and is possibly induced by the release of cytokines, such as IL-1, IL-6, TNF in view the simultaneously increased appearance of apoptosis and
cytokines.

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¹æ»ç¼±Á¶»ç; °£; Apoptosis; Cytokines; Radiation; Liver; Apoptosis; Cytokine;

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