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Abstract

°á·Ð
º» ¿¬±¸¿¡¼­´Â ¼¼Æ÷½ÅÈ£ Àü´Þ°ú °ü·Ã ÀÖ´Â oleate-PLDÀÇ È°¼ºµµ¸¦ Á¾¾ç¼¼Æ÷¸¦ Æ÷ÇÔÇÑ 19
°³ÀÇ ¼¼Æ÷ÁÖµéÀ» ¼±ÅÃÇÏ¿© °Ë»öÇÏ¿´´Ù. À̵é Áß Æ¯È÷ PLD È°¼ºµµ°¡ Å« VERO 76, L1210,
P388¼¼Æ÷µéÀÇ ¹æ»ç¼± ¿µÇâÀ» ½Ç½ÃÇÏ¿´´Ù. ¼¼Æ÷±«»ç µîÀ» À¯¹ß½ÃÅ°´Â ¹æ»ç¼±¿¡ ÀÇÇÑ PLD È°
¼ºÈ­ È¿°ú´Â VERO 76ÀÎ °æ¿ì 20 Gy Á¶»ç½Ã 2¹è·Î °ÅÀÇ Áï½Ã Áõ°¡ÇÏ¿´´Ù. ÀÌ Çö»óÀº óÀ½
À¸·Î ¼¼Æ÷ÀÇ ±«»ç¿Í oleate-PLDÀÇ »ó°ü °ü°è¸¦ º¸¿©ÁÖ´Â ½ÇÇè °á°úÀÌ´Ù. À̸¦ ±Ù°Å·Î ¹æ»ç
¼± Á¶»ç ÀüÈÄÀÇ ¼¼Æ÷ÁÖ¿¡ ¹ÌÄ¡´Â ¿©·¯ È­Çй°ÁúµéÀÇ ¿µÇâÀ» °üÂûÇÑ °á°ú ¹æ»ç¼± Á¶»ç·Î ÀÎ
ÇÑ ¼¼Æ÷³» ȯ°æÀÇ º¯È­°¡ PLD È°¼ºµµ º¯È­¿¡ ¿µÇâÀ» ÁÖ¾úÀ½À» ³ªÅ¸³» ÁÖ°í ÀÖ´Ù. µû¶ó¼­
º» ¿¬±¸ °á°ú´Â ¹æ»ç¼± »ý¹°ÇÐ ¿¬±¸¿Í °ü·ÃµÈ ¼¼Æ÷ºÐ¿­, ¼¼Æ÷»ç¸Á, ¶Ç´Â ¾Ï ¹ß»ý°úÁ¤ ¿¬±¸¿¡
ÀÌ¿ë°¡Ä¡°¡ Ŭ °ÍÀ¸·Î ÆǴܵȴÙ.
#ÃÊ·Ï#
Purpose : Phospholipase D (PLD) catalyzes the hydrolytic cleavage of terminal
phosphate diester bond of glycerophopholipids to produce phosphatidic acid (PA). PLD
plays an important role in signal transduction and is known to be involved closely in
cancer promotion, inflammation, and other cell responses. In order to evaluate radiation
effect in tumor cells, various cells were screened for PLD activities and examined their
radiation effects on PLD following ¥ã-ray irradiation.
Materials and Methods : PLD activities in 19 species of cell were measured by
radioactive isotope method with 1,2 - di [1-l4C] phosphatidylcholine in the
presence of oleate. Among the cell lines examined, VERO 76, L 1210 and P 388 were
selected and examined for their effects of metal ions and agonists on PLD activities
before and after irradiation by Co-60 teletheraphy unit.
Results : The activities of cleats-PLD were observed in 11 species among 19 cell
lines examined. VERO 76 and L 1210 cells showed that the PLD activity increased
immediately after irradiation and reached to 150 ¡­ 200% of the control levels. The
activation of PLD in response to ¥ã-ray was maximum at 20 Gy In irradiated VERO 76,
the stimulatory effect of Mg2+was reduced and the activation of PLD by
agonists in irradiated cells vary from those of the control cells.
Conclusion : The activation effect of irradiation on PLD activity observed strongly
implies that the PLD activity is closely related to the phenomena of cell necrosis.
Therefore the cell lines examined here could provide a good source for the study of
radiobiology that cover from cell death to cancer promotion.

Å°¿öµå

Phospholipase D; Irradiation; Signal transduction; Cancer; Cell lines;

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