Àá½Ã¸¸ ±â´Ù·Á ÁÖ¼¼¿ä. ·ÎµùÁßÀÔ´Ï´Ù.

¸¶¿ì½ºÀÇ ´ë³úÁ¶Á÷¿¡¼­ ¹æ»ç¼±¿¡ ÀÇÇÑ ¾ÆÆ÷Åä½Ã½º¿Í ¼¼Æ÷ÁÖ±âÀÇ Á¶Àý Regulation of Apoptosis and Cell Cycle in Irradiated Mouse Brain

´ëÇѹæ»ç¼±Á¾¾çÇÐȸÁö 2001³â 19±Ç 2È£ p.146 ~ 152
¼Ò¼Ó »ó¼¼Á¤º¸
¿À¿ø¿ë/Won Yong Oh ¼Û¹ÌÈñ/Á¤ÀºÁö/¼ºÁø½Ç/¼­Ã¢¿Á/Mi Hee Song/Eun Ji Chung/Jin Sil seong/Chang Ok Suh

Abstract

¸ñÀû: ¸¶¿ì½º ´ë³úÁ¶Á÷¿¡ ¹æ»ç¼±ÀÌ Á¶»çµÇ¾úÀ» °æ¿ì ¾ÆÆ÷Åä½Ã½º¿Í ¼¼Æ÷ÁÖ±âÀÇ Á¶ÀýÀÛ¿ë¿¡ ¾î¶² ¿µÇâÀ» ¹ÌÄ¡´Â Áö¸¦ ¿¬±¸ÇÏ°íÀÚ ÇÏ¿´´Ù.
´ë»ó ¹× ¹æ¹ý: 8ÁÖ°£ ¼º¼÷µÈ C57B1/6J ¸¶¿ì½ºÀÇ Àü³ú¿¡ ÄÚ¹ßÆ® ¹æ»ç¼±Á¶»ç±â·Î 25 GyÀÇ ¹æ
»ç¼±À» ´ÜÀÏ Á¶»çÇÏ¿´´Ù. ¹æ»ç¼±Á¶»çÈÄ 1, 2, 4, 8, 24½Ã°£ °£°ÝÀ¸·Î ¸¶¿ì½º¸¦ °æÃß Å»±¸»ç½Ã
Ų ÈÄ ³úÁ¶Á÷À» äÃëÇÏ¿´´Ù. äÃëÇÑ ³úÁ¶Á÷À» TUNEL ºÐ¼®¹ý¿¡ ÀÇÇÏ¿© ¾ÆÆ÷Åä½Ã½º À¯µµ ¼ö
ÁØÀ» Æò°¡ÇÏ¿´À¸¸ç Western blotting¹ýÀ» ÀÌ¿ëÇÏ¿© À¯ÀüÀÚ »ê¹°ÀÎ p53, Bcl-2, Bax ±×¸®°í
¼¼Æ÷ÁÖ±â Á¶ÀýÀÎÀÚÀÎ cyclin B1, D1, E, cdk2, cdk4, p34cdc2¸¦ ºÐ¼®ÇÏ¿´´Ù. ¼¼
Æ÷ÁÖ±âÀÇ º¯È­´Â À¯¼¼Æ÷ºÐ¼®¹ý¿¡ ÀÇÇÏ¿© ºÐ¼®µÇ¾ú´Ù.
°á°ú: ¾ÆÆ÷Åä½Ã½º´Â ¹æ»ç¼±Á¶»çÈÄ 8½Ã°£¿¡¼­ ÃÖ°íÄ¡¸¦ º¸¿´°í ¾ÆÆ÷Åä½Ã½º Áö¼ö´Â 24.0¡¾0.25
(p<0.05)¿´´Ù. ¼¼Æ÷Áֱ⿡¼­ Á¶ÀýÀÎÀÚÀÇ º¯È­´Â cyclin D1¸¦ Á¦¿ÜÇÏ°í´Â ƯÀÌÇÏÁö ¾Ê¾Ò´Ù.
°á·Ð: ¸¶¿ì½ºÀÇ Àü³ú¿¡ ¹æ»ç¼±À» Á¶»çÇÑ °á°ú ¾ÆÆ÷Åä½Ã½º´Â ´ë³úÀÇ »óÀÇÇÏ(subependyma)¿¡
¼­ ÁÖ·Î ÀϾÀ¸¸ç ¼¼Æ÷ÁÖ±âÀÇ Á¶ÀýÀÎÀÚ¿¡´Â ¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê´Â °ÍÀ¸·Î ÆǸíµÇ¾ú´Ù.

Purpose: To investigate the regulation of apoptosis and cell cycle in mouse brain irradiation.
Materials and Methods: 8-week old male mice, C57B1/6J were given whole body ¥ã
-radiation with a single dose of 25 Gy using Cobalt 60 irradiator. At different times 1,
2, 4, 8 and 24hr after irradiation, mice were killed and brain tissues were collected.
Apoptotic cells were scored by TUNEL assay. Expression of p53, Bcl-2, and Bax and
cell cycle regulating molecules; cyclins B1, D1, E and cdk2, cdk4, p34cdc2
were analysed by Western blotting. Cell cycle was analysed by Flow cytometry.
Results: The peak of radiation induced apoptosis is shown at 8 hour after radiation.
With a single 25 Gy irradiation, the peak of apoptotic index in C57B1/6J is 24.0¡¾0.25
(p<0.05) at 8 hour after radiation. Radiation upregulated the expression of p53/tubulin,
Bax/tubulin, and Bcl-2/tubulin with 1.3, 1.1 and 1.45 fold increase, respectively were
shown at the peak level at 8 hour after radiation. The levels of cell cycle regulating
molecules after radiation are not changed significantly except cyclin D1 with 1.3 fold
increase. Fractions of Go-G1, G2-M and S phase in the cell cycle does not specific
changes by time.
Conclusions: In mouse brain tissue, radiation induced apoptosis is particularly shown in
a specific area, subependyma. These results and lack of radiation induced changes in
cell cycle offer better understanding of radiation response of normal brain tissue

Å°¿öµå

¸¶¿ì½º ´ë³ú ¹æ»ç¼±Á¶»ç; ¾ÆÆ÷Åä½Ã½º À¯µµ; ¼¼Æ÷ÁÖ±âÀÇ Á¶Àý; Mouse brain(cerebrum) irradiation; Apoptosis; Cell cycle;

¿ø¹® ¹× ¸µÅ©¾Æ¿ô Á¤º¸

   

µîÀçÀú³Î Á¤º¸

KCI
KoreaMed
KAMS