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Abstract

¸ñ Àû : Âø»óÀü±âÀÇ Áø´Ü ¹× Ä¡·á ¿µ¿ªÀÇ ¹æ»ç¼± Á¶»ç°¡ ÀӽŠddy mouse¿¡¼­ »êÀü »ç¸Á
°ú ¿ÜºÎ ±âÇüÀ» À¯¹ßÇÏ´ÂÁö, compactionÀü ½Ã±âÀÇ ¹ÝÀÀ¿¡ ½Ã±âº° Â÷ÀÌ°¡ ÀÖ´ÂÁö ±×¸®°í °è
Åë¿¡ µû¸£´Â Â÷ÀÌ°¡ ÀÖ´ÂÁö ¿©ºÎ¸¦ ¾Ë¾Æ º¸°íÀÚ ÇÏ¿´´Ù.
´ë»ó ¹× ¹æ¹ý : ÀӽŠduty mouse ´ëÁ¶±º 32 ¸¶¸®¿Í ½ÇÇ豺 53 ¸¶¸®¸¦ ´ë»óÀ¸·Î ¿¬±¸¸¦
½ÃÇàÇÏ¿´À¸¸ç, ½ÇÇ豺¿¡ ´ëÇÑ ¹æ»ç¼± Á¶»ç´Â Âø»óÀüÀÇ Áß¿äÇÑ µÎ ½Ã±âÀÎ 24 h p.c.¿Í 48 h
p.c.¿¡ Áø´Ü ¿µ¿ª¿¡¼­µµ ÀÌ¿ëµÇ´Â ¹æ»ç¼± ¼±·®ÀÎ 0.1, 0.5 Gy¸¦ Æ÷ÇÔÇÏ¿© 0.75, 1.5, 3 Gy¸¦
Á¶»çÇÑ ÈÄ, ÀӽŠ18ÀÏ¿¡ Èñ»ý½ÃÄÑ »êÀü »ç¸Á Áï Âø»óÀü »ç¸Á, ¹è »ç¸Á ¹× ÅÂ¾Æ »ç¸Á°ú ¿ÜºÎ
±âÇüÀ» °üÂûÇÏ¿´´Ù.
°á °ú : 1) Âø»óÀü »ç¸ÁÀº 24 h p.c. ¹× 48 h p.c.¿¡¼­ ´ëÁ¶±º¿¡ ºñÇØ ÇöÀúÇÏ°Ô ¸¹ÀÌ ¹ß»ý
ÇÏ¿´À¸¸ç ¼±·® ÀÇÁ¸¼ºÀ» ³ªÅ¸³Â°í, ½Ã±âº° ÇÑ°è ¼±·®Àº °¢°¢ 0.05 Gy ¹× 0.075 GyÀÌ»óÀ¸·Î
24 h p.c.°¡ 48 h p.c.º¸´Ù ¹æ»ç¼±¿¡ ´ëÇÑ °¨¼ö¼ºÀÌ ³ôÀº ½Ã±âÀÓÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. 2) ¹è »ç¸Á
Àº 48 h p.c.ÀÇ 0.1 Gy Á¶»ç±ºÀ» Á¦¿ÜÇÑ 24 h p.c. ¹× 48 h p.c.ÀÇ ¸ðµç Á¶»ç±º¿¡¼­ ´ëÁ¶±º¿¡
ºñÇØ ¸¹ÀÌ ¹ß»ýÇÏ¿´°í ¼±·® ÀÇÁ¸¼ºÀ» º¸¿´À¸¸ç, ÇÑ°è ¼±·®Àº °¢°¢ 0.1 Gy ¹× 0.25 GyÀÌ»óÀ¸
·Î 24 h p.c.°¡ 48 h p.c.º¸´Ù ¹æ»ç¼± Á¶»ç¿¡ ÀÇÇÑ ¹è »ç¸ÁÀÇ °¨¼ö¼ºÀÌ ³ô¾Ò´Ù 3) ÅÂ¾Æ »ç¸Á
Àº 24 h p.c. ¹× 48 h p.c.ÀÇ ½ÇÇ豺 ¸ðµÎ¿¡¼­ ¹ß»ýÇÏÁö ¾Ê¾Ò´Ù. 4) ¿ÜºÎ ±âÇüÀº 24 h p.c. ½Ç
Ç豺¿¡¼­ ³ú³ëÃâ ±âÇü 2¿¹, ¾È°Ë°á¼Õ ±âÇü 3¿¹, ¹«¾È±¸Áõ 3¿¹, ±¸°³¿­ 2¿¹, º¹º® ÆÄ¿­ 2¿¹,
²¿¸® ±âÇü 2¿¹ ¹× ´Ù¸® ±âÇü 1¿¹, ±¹¼Ò º¹º® °á¼Õ 1¿¹ µîÀÌ ¹ß»ýÇÏ¿´´Âµ¥, ±× Áß Áø´Ü ¿µ¿ª
ÀÇ ¹æ»ç¼± ¼±·®ÀÎ 0.1 Gy±º¿¡¼­ ¾È°Ë°á¼Õ ±âÇü 1¿¹, º¹º® ÆÄ¿­ 1¿¹, 0.5 Gy±º¿¡¼­ ³ú³ëÃâ
±âÇü 1¿¹, ²¿¸® ±âÇü 2¿¹ ¹× ´Ù¸® ±âÇü 1¿¹°¡ ¹ß»ýÇÏ¿© ´ëÁ¶±º¿¡ ºñÇØ Åë°èÀûÀ¸·Î À¯ÀÇÇÑ
Áõ°¡¸¦ ³ªÅ¸³ÂÀ¸¸ç ÀÌ ½Ã±âÀÇ ÇÑ°è ¼±·®Àº 0.2 GyÀÌ»óÀ̾ú´Ù 48 h p.c.±º¿¡¼­µµ ¾È°Ë°á¼Õ
±âÇü 1¿¹, ²¿¸® ±âÇü 2¿¹°¡ ¹ß»ýÇÏ¿´À¸³ª ´ëÁ¶±º°ú Åë°èÀûÀÎ À¯ÀÇÂ÷°¡ ¾ø¾ú´Ù.
°á ·Ð : ÀÌ»óÀÇ °á°ú¸¦ ÅëÇØ Ä¡·á ¿µ¿ª »Ó¸¸ ¾Æ´Ï¶ó Áø´Ü ¿µ¿ªÀÇ ¹æ»ç¼± Á¶»ç·Îµµ Âø»óÀü
±â ÀӽŠddy mouse¿¡¼­ Âø»óÀü »ç¸Á ¹× ¹è »ç¸ÁÀÌ ¹ß»ýÇÏ°í 24 h p.c.¿¡¼­´Â ±âÇüµµ À¯¹ß
µÇ¾î À̽ñâÀÇ ¹æ»ç¼± ¿µÇâÀÌ "all-or-none" ¹ÝÀÀ¸¸ ÀϾ´Â °ÍÀÌ ¾Æ´ÔÀ» ¾Ë ¼ö ÀÖ¾úÀ¸¸ç,
24 h p.c.°¡ 48 h p.c.º¸´Ù ¹æ»ç¼± °¨¼ö¼ºÀÌ ³ôÀº ½Ã±â¶ó´Â »ç½Ç°ú ÇÔ²² ´Ù¸¥ ¿¬±¸ °á°úµé°ú
ºñ±³ÇÏ¿© °èÅë¿¡ µû¸£´Â Â÷ÀÌ°¡ ÀÖÀ½À» ¾Ë ¼ö ÀÖ¾ú´Ù. ±×·¯¹Ç·Î °¡Àӱ⠿©¼ºÀÇ ¹æ»ç¼± Áø´Ü
¹× Ä¡·á½Ã RughÀÇ 10ÀÏ ¹ýÄ¢À» Àû¿ëÇÏ¿© Âø»óÀü±â ¹æ»ç¼± Á¶»ç·Î ÀÎÇÑ ºÎÀÛ¿ëµéÀ» Àû±ØÀû
À¸·Î ¿¹¹æÇÏ´Â °ÍÀÌ ¸Å¿ì Áß¿äÇÏ´Ù°í »ý°¢ÇÑ´Ù.

Purpose : To evaluate the effects of X-irradiation on prenatal deaths, i.e.,
preimplantation deaths, embryonic deaths, and fetal deaths and on external
malformations in precompacted preimplantation ddy mice.
Materials and Methods : Pregnant mice (n=85), obtained by limiting the mating time
to from 6 to 9 A.M., were segregated into 11 groups. The first five groups (n=26) were
irradiated with X-ray doses of 0.1, 0.5, 0.75, 1.5, and 3 Gy, respectively, at 24 h post
conception (p.c.) of the preimplantation period. The second five (n=27) groups were
irradiated at the same X-ray doses, respectively, but at 48 h p.c. of the preimplantation
Period. The last group (n=32) was the control group The uterine contents were
examined on the 18th day of gestation for prenatal deaths and external malformations.
Results :
1) A statistically significant increase in preimplantation deaths with increasing dose
was observed in the experimental groups irradiated at 24 h p.c. and in the groups
irradiated at 48 h p.c., as compared to the control group. The threshold dose was close
to 0.05 Gy and 0.075 Gy for the irradiations at 24 h p.c. and 48 h p.c respectively.
2) A statistically significant increase in embryonic deaths with increasing dose was
observed in all irradiation groups, except the group irradiated with a dose of 0.1 Gy at
48 h p.c..
3) No fetal deaths were found in any experimental group.
4) In the experimental groups irradiated at 24 h p.c.. anomalies increased with
statistical significance, as compared with the control group: 2 exencephalies, 2 open
eyelids, 3 anophthalmias, 2 cleft palates, 2 gastroschisis, 1 abdominal wall defect, 1 leg
defect, and 2 short tail anomalies; the threshold dose for external malformations was
close to 0.2 Gy at 24 h p.c.. In the groups irradiated at 48 h p.c., 1 open eyelid and 2
short tail anomalies were observed, but there was no statistical significance in those
malformations.
Conclusion : The results of this study reveal that X-irradiation of precompacted
preimplantation ddy mice causes not only preimplantation deaths and embryonic deaths
but also external malformations In addition, external malformations were observed in our
experiments at diagnostic doses, including 0.1 and 0.5 Gy. For this reason, we
recommend that irradiation should be avoiding during the preimplatation period by
applying Rugh's 10-day rule.

Å°¿öµå

Irradiation; Preimplantation period; ddy mice; Prenatal death; External malformation;

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