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IRRADIATION EFFECT ON SECRETING FUNCTION, AMYLASE ACTIVITY AND NUCLEIC ACID CONTENTS OF RAT PAROTID GLAND

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Abstract

µÎ°æºÎÀÇ ¾Ç¼ºÁ¾¾ç Ä¡·á¸¦ À§ÇÑ ¹æ»ç¼± Á¶»ç½Ã ÁÖº¯Àå±â¿¡ ´ëÇÑ ÇÇÆøÀº ÇÇÇϱ⠾î·Á¿ì¸ç
ƯÈ÷ Ÿ¾×¼±°ú °°Àº ¼±Á¶Á÷Àº ¹æ»ç¼± ÀåÇØ°¡ ºó¹øÇÏ°Ô ³ªÅ¸³ª´Â Á¶Á÷ÁßÀÇ ÇϳªÀÌ´Ù. º» ½Ç
ÇèÀº ÈòÁã ÀÌÇϼ±À» ´ë»óÀ¸·Î ¹æ»ç¼±À» Á¶»çÇÑ ÈÄ ½Ã°£ °æ°ú¿¡ µû¸¥ ÀÌÇϼ±ÀÇ ºÐºñ±â´ÉÀÇ
º¯È­¸¦ °üÂûÇÏ¿´´Ù. ½ÇÇ赿¹°À» ´ëÁ¶±º°ú Á¶»ç±ºÀ¸·Î ±¸ºÐÇÏ°í Á¶»ç±ºÀº 6½Ã°£, 3ÀÏ, 7ÀÏ, 14
ÀÏ ¹× 28ÀÏ °æ°ú±ºÀ¸·Î ¼¼ºÐÇÏ°í ÀÏÁ¤±â°£ µ¿ÀÏ Á¶°Ç¿¡¼­ »çÀ°µÇ¾ú´Ù. ¹æ»ç¼± Á¶»ç´Â
60Co¥ã¼±À» ÀÌ¿ëÇÏ¿´À¸¸ç, Á¶»ç·®Àº 20Gy·Î ÇÏ°í
99mTcO4- 0.2¥ìCi/gÀ» ½ÇÇ赿¹°ÀÇ º¹°­³»¿¡ ÁÖ
»çÇÏ¿© ½Ã°£¿¡ µû¸¥ ¼·ÃëÀ², ÀÜ·ù·® ¹× ºÐºñ°è¼ö¸¦ ÃøÁ¤ÇÏ°í amylaseÈ°¼ºµµ, DNA¿Í RNA
ÇÔ·®À» ÃøÁ¤ÇÏ¿´´ø ¹Ù ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. 60CO ¹æ»ç¼± Á¶»ç ÈÄ ÀÌÇϼ±ÀÇ
99mTcO4- ¼·Ãë·®Àº 6½Ã°£ °æ°ú±ºÀ» Á¦¿ÜÇÑ Àü
½ÇÇ豺¿¡¼­ ´ëÁ¶±º¿¡ ºñÇØ Áõ°¡ÇÏ´Â °æÇâÀ» º¸À̸ç 3ÀÏ °æ°ú±º¿¡¼­ ÃÖ´ëÄ¡¸¦ º¸¿´´Ù.
2. ºÐºñÀÚ±Ø ÈÄ ÀÌÇϼ±¿¡ ÀÜ·ùÇÏ´Â 99mTcO4-
ÀÇ ´ÜÀ§ üÁß´ç ¹æ»ç¼±·®Àº 3ÀÏ °æ°ú±º¿¡¼­ ÃÖ°íÄ¡¿¡ µµ´ÞÇÏ¿´À¸¸ç, ±× ÀÌÈÄ È¸º¹µÇ´Â °æÇâ
À» º¸¿´´Ù.
3. ÀÌÇϼ±ÀÇ ÀÚ±Ø ºÐºñ°è¼ö´Â ¹æ»ç¼± Á¶»çÈÄ 6½Ã°£, 3ÀÏ ¹× 7ÀÏ °æ°ú±º¿¡¼­ °¨¼ÒÇϸç, 14
ÀÏ°ú 28ÀÏ °æ°ú±º¿¡¼­´Â Áõ°¡ÇÏ´Â °æÇâÀ» º¸¿´´Ù.
4. ÀÌÇϼ±ÀÇ amylaseÈ°¼ºµµ´Â ¹æ»ç¼± Á¶»çÈÄ 3ÀÏ°ú 7ÀÏ °æ°ú±º¿¡¼­ °¨¼ÒÇÏ´Â °æÇâÀ» º¸¿´
°í 3ÀÏ °æ°ú±º¿¡¼­ ÃÖ¼ÒÄ¡¸¦ ³ªÅ¸³»¾ú´Ù.
5. ¹æ»ç¼± Á¶»ç½Ã ÀÌÇϼ±ÀÇ DNA ÇÔ·®Àº Àü ½ÇÇ豺¿¡¼­ °ÅÀÇ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾ÒÀ¸³ª,
RNAÇÔ·®Àº ½Ã°£ÀÌ °æ°úÇÔ¿¡ µû¶ó °¨¼ÒÇÏ¿´´Ù.
#ÃÊ·Ï#
This experiment was performed to clarify the effects of 60CO gamma
irradiation on secretory function, amylase activity and contents of nucleic acids of
parotid gland in rat. Experimental animals were divided into 6th hours, 3rd, 7th, 14th
and 28th days after irradiation and control. The experimental animals are singly
irradiated with 20Gy (2,000rad) through protective lead block. Secretory function of
parotid gland was evaluted by uptake and clearance of
99mTcO4. 99mTcO4, 0.2¥ì ci/gm,
was injected into peritonium in uptake groups. Rats were sacrified with cervical
dislocation after 30 minutes and gland was excised. In the clearance group, pilocarpine
nitrate (8§·/§¸) was intraperitoneally injected at 30 minutes after
99mTcO4- injection and rats were sacrified 30 minutes after
pilocarpine injection. Radioactivity of excised parotid gland was measured by using of
gamma counter and stimulation-secretion coefficients, uptake radioactivity divided by
clearance radioactivity, was calculated. Amylase activity and contents of DNA and RNA
were determined by spectrophotometry.
The results obtained were as follows:
1. In the uptake test, the radioactivity of 99mTcO4 per unit
weight increase in experimental group except 6th hours group, compared with control
groups and showed a peak at 3rd days after irradiation.
2. In the clearance test, the radioactivity of 99mTcO4 per
unit weight rose to a peak at 3rd days after irradiation and gradually recovered
thereafter.
3. Stimulation-secretion coefficient of parotid gland decreased at 6th hours, 3rd and
7th days after irradiation, and gradually increased.
4. Amylase activity of parotid gland decreased in 3rd and 7th days group, and
especially lowest in 3rd days after irradiation.
5. The contents of DNA showed no definite difference in all the experimental groups,
but RNA was seemed to decrease with time after irradiation.

Å°¿öµå

irradiation uptake; clearance; 99mTcO4; rat parotid gland; DNA; RNA;

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