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AN EXPERIMENTAL STUDY OF THE IRRADIATION EFFECTS ON THE CAPILLARY AND ENDOTHEILIAL CELL OF THE RAT SUBMANDIBULAR GLAND

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Abstract

¹æ»ç¼±Á¶»ç¿¡ µû¸¥ Ÿ¾×¼±³» ¹Ì¼¼Ç÷°ü°ú ³»ÇǼ¼Æ÷ÀÇ º¯È­¸¦ °üÂûÇϱâ À§ÇÏ¿© ¹é¼­ÀÇ ¾ÇÇÏ
¼±¿¡ 6MV X¼±À» 5Gy ¹× l0Gy ´ÜÀÏÁ¶»çÇÑ ÈÄ 6½Ã°£, 12½Ã°£, 1ÀÏ, 3ÀÏ, 7ÀÏ ±×¸®°í 14ÀÏ¿¡
Èñ»ý½ÃÅ°°í Åõ°úÀüÀÚÇö¹Ì°æ ¹× H & E, PAS ¿°»öÀ» ½ÃÇàÇÏ¿© Á¶Á÷ÇÐÀû º¯È­¸¦ °üÂûÇÏ°í
´ÙÀ½ÀÇ °á°ú¸¦ ¾ò¾ú´Ù.
1. ¹Ì¼¼Ç÷°üÀº 5Gy Á¶»çÈÄ 12½Ã°£±º¿¡¼­ ºÐÆ÷¹ÐµµÀÇ Áõ°¡°¡ ³ªÅ¸³µ°í, 3Àϱº¿¡¼­ ¹Ðµµ°¡
°¨¼ÒµÇ¾úÀ¸³ª 14Àϱº¿¡¼­´Â ´Ù¼Ò ȸº¹µÇ¾ú´Ù. l0Gy Á¶»ç±ºÀÇ ¼Ò°ßµµ À¯»çÇÏ¿´À¸³ª 5Gy Á¶
»ç±º¿¡ ºñÇØ ¹ÝÀÀÁ¤µµ°¡ ºü¸£°í ºÐ¸íÇÏ¿´À¸¸ç, 14Àϱº¿¡¼­µµ ¹Ì¼¼Ç÷°üÀÇ ºÐÆ÷¹Ðµµ´Â °¨¼ÒµÇ
¾î ³ªÅ¸³µ´Ù.
2. ¼±¼¼Æ÷ÀÇ PAS ¹ÝÀÀÀº 5Gy Á¶»çÈÄ 6½Ã°£±º¿¡¼­ ¾ç¼º¹ÝÀÀÀÌ °¨¼ÒµÇ¾úÀ¸³ª 1Àϱº¿¡´Â
¾à°£ Áõ°¡µÇ¾ú°í, 3Àϱº¿¡¼­ ´Ù½Ã °¨¼ÒµÇ´Â °æÇâÀ» º¸¿´À¸¸ç, 14Àϱº¿¡¼­´Â °ÅÀÇ Á¤»óÀ¸·Î
ȸº¹µÇ¾ú´Ù. ÀÌ·¯ÇÑ ¼Ò°ßÀº l0Gy Á¶»ç±º¿¡¼­µµ À¯»çÇÏ°Ô ³ªÅ¸³µÀ¸³ª ¹ÝÀÀÁ¤µµ°¡ 5Gy Á¶»ç
±º¿¡ ºñÇØ ºÐ¸íÇÏ¿´´Ù.
3.Ç÷°ü³»ÇǼ¼Æ÷ÀÇ Åõ°úÀüÀÚÇö¹Ì°æ ¼Ò°ßÀº ¹æ»ç¼±Á¶»çÁ÷ÈÄ Ç÷°ü³»°­ÀÇ Ãà¼Ò¿Í ¼¼Æ÷Áúµ¹±â
ÀÇ ¹Ì¾àÇÑ Áõ½ÄÀÌ °üÂûµÇ¾ú°í, 1ÀϱºÀÌÈÄ¿¡¼­´Â ÇÙº¯¼º°ú ÇÔ²² ¼¼Æ÷Áúµ¹±â¿Í ¼¼Æ÷Áú³» ¼ÒÆ÷
ÀÇ ¶Ñ·ÇÇÑ Áõ°¡,±×¸®°í ±âÀú¸·ÀÇ ºñÈÄ°¡ °üÂûµÇ¾ú´Ù. ±×ÈÄ 5GyÁ¶»çÈÄ 14Àϱº¿¡¼­´Â Á¤»óÀ¸
·Î ȸº¹µÇ´Â °æÇâÀ̾úÀ¸³ª l0Gy Á¶»ç±º¿¡¼­´Â ȸº¹µÇÁö ¾Ê¾ÒÀ¸¸ç,Àü ½ÇÇ豺¿¡¼­ ±âÀú¸· ¼Ò
½ÇÀ̳ª ¼¼Æ÷³» ¹Ì¼¼±¸Á¶ÀÇ Æı«´Â °üÂûµÇÁö ¾Ê¾Ò´Ù.
4. ÀÌ»óÀÇ ¼Ò°ßÀ¸·Î ¹Ì·ç¾î º¸¾Æ, ¹æ»ç¼±Á¶»çÈÄ ¾ÇÇϼ±ÀÇ ¹Ì¼¼Ç÷°üÀº ³»°­ÀÇ Ãà¼Ò¿Í ³»ÇÇ
¼¼Æ÷ ¼¼Æ÷Áúµ¹±âÀÇ Áõ½Ä, ±âÀú¸·ÀÇ ºñÈÄ µîÀÌ ³ªÅ¸³ª°í, ÀÌ·Î ÀÎÇÑ ¿µ¾ç ¹× »ê¼Ò°ø±ÞÀÇ °¨
¼Ò¿¡ ´ëÇÑ ´ëÀÀÁ¶Ä¡·Î¼­ ¹Ì¼¼Ç÷°üÀÇ ºÐÆ÷¹Ðµµ°¡ Áõ°¡µÇ°í ¼ÒÆ÷ ¼öÀÇ Áõ°¡¸¦ ÅëÇØ ³»ÇǼ¼Æ÷
ÀÇ Åõ°ú¼ºÀÌ Ç×ÁøµÇ´Â °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç, ÀÌ·¯ÇÑ º¯È­´Â 5Gy Á¶»ç±º¿¡ ºñÇØ l0Gy Á¶»ç±º
¿¡¼­ Å©°í ºü¸£°Ô ³ªÅ¸³µ´Ù.
#ÃÊ·Ï#
The purpose of this study was to investigate the irradiation effects on the capillary
and endothelial cell in the submandibular gland. Sprague-Dawley strain male rats were
singly irradiated to their neck region with the dose of 5Gy and l0Gy by 6MV
X-irradiation and sacrificed on the 6 hours, 12 hours, 1, 3, 7, and 14 days after
irradiation.
The authors observed the histological changes of the capillary at H & I and PAS
staining under a light microscope, and also observed the ultrastructural changes of the
endothelial cell using a transmission electron microscope. The obtaining results were as
follows:
1. In the light microscopic examination, the capillary density was slightly increased on
the 1 day after irradiation, and increased until the 7 days after irradiation. After then,
capillary density was apparently decreased.
2. The reaction to PAS staining at acinar cells was decreased on the 6 hours after
irradiation, and recovered on the 7 days after irradiation. But reaction was decreased on
the 14 days after irradiation again, after then, gradually recovered with days.
3. In the transmission electron microscopic examination, mild proliferation of
cytoplasmic process of the endothelial cell and reduction in luminal size were observed
just after irradiation. After then, nuclear degeneration, marked proliferation of
cytoplasmic process, thickened basal lamina, and numerous cytoplasmic vesicles were
observed on the 1 day after irradiation. These changes were recovered to normal on the
14 days after 5Gy group, but not with l0Gy irradiation group. And destruction of
endothelial cell and loss of basal lamina were not observed in both groups.
4. From the above results, reduction in luminal size, proliferation of cytoplasmic
process and thickening of basal lamina were observed as the irradiation effects on the
capillary and endothelial cell of the submandibular gland. And also, these changes may
induce increase in capillary number and endothelial permeability by means of increase of
cytoplasmic vesicle formation. The changes appeared earlier and more prominent in l0Gy
irradiated group than in 5Gy irradiated group.

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