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AN EXPERIMENTAL STUDY OF THE IRRADIATION EFFECTS ON THE MICROVASCULATURE OF THE RAT SUBMANDIBULAR GLAND

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Abstract

¹æ»ç¼± Á¶»çÈÄ Å¸¾×¼± ¹Ì¼¼Ç÷°ü°èÀÇ º¯È­¸¦ °üÂûÇϱâ À§ÇÏ¿© ¹é¼­ÀÇ ¾ÇÇϼ±¿¡ 6MV X¼±
10Gy ¹× 20Gy¸¦ ´ÜÀÏÁ¶»çÇÑ ÈÄ 1ÀÏ, 3ÀÏ, 7ÀÏ, 14ÀÏ, ±×¸®°í 28ÀÏ¿¡ Èñ»ý½ÃÄÑ ¹é¼­ ¾ÇÇϼ±
Á¶Á÷À» H&E ¿°»ö ¹× PAS ¿°»öÇÏ¿© ±¤ÇÐÇö¹Ì°æÀ¸·Î Á¶Á÷ÇÐÀû º¯È­¸¦ °Ë»öÇÏ¿´À¸¸ç, ¹Ì¼¼
Ç÷°ü°èÀÇ ÁÖÇà°æ·Î ¹× ÇüÅÂÇÐÀû º¯È­¸¦ ÁÖ»çÀüÀÚÇö¹Ì°æÀ¸·Î °üÂûÇÏ¿´°í Ç÷°ü ³»ÇǼ¼Æ÷ÀÇ ÃÊ
¹ÌÇüÅÂÇÐÀû º¯È­¸¦ Åõ°úÀüÀÚÇö¹Ì°æÀ¸·Î °üÂûÇÏ¿© ´ÙÀ½ÀÇ °á°ú¸¦ ¾ò¾ú´Ù.
1. ±¤ÇÐÇö¹Ì°æÀû ¼Ò°ß»ó, ¹Ì¼¼Ç÷°üÀº ¹æ»ç¼± Á¶»çÈÄ 7Àϱº±îÁö È®Àå»óÀ» ³ªÅ¸³»¾úÀ¸³ª ±×
Èķδ ȮÀå»óÀÌ ¼Ò½ÇµÇ°í ¼öÀûÀ¸·Îµµ °¨¼ÒµÇ¾úÀ¸¸ç, 10Gy Á¶»ç±º¿¡ ºñÇØ 20Gy Á¶»ç±º¿¡¼­
ÀÇ º¯È­°¡ ´õ¿í ¶Ñ·ÇÇÏ¿´´Ù.
2. ¼±¼¼Æ÷ÀÇ PAS ¿°»ö¼ºÀº ¹æ»ç¼± Á¶»ç Á÷ÈÄ °¨¼ÒµÇ¾úÀ¸³ª ½Ã°£ÀÌ °æ°úµÊ¿¡ µû¶ó Â÷Ãû
ȸº¹µÇ¾úÀ¸¸ç, 10Gy Á¶»ç±º°ú 20Gy Á¶»ç±º°£ÀÇ Â÷ÀÌ´Â ÇöÀúÇÏÁö ¾Ê¾Ò´Ù.
3. ÁÖ»çÀüÀÚÇö¹Ì°æÀû ¼Ò°ß»ó, ¹æ»ç¼± Á¶»çÈÄ 3Àϱº¿¡¼­ Ç÷°üÀÇ È®Àå ¹× ¸¸°î»óÀÌ ³ªÅ¸³µÀ¸
¸ç Á¶»çÈÄ 7Àϱº¿¡¼­´Â Ç÷°ü Á¶¹ÐµµÀÇ °¨¼Ò¿Í ´ÜÀý»óÀÌ µ¿¹ÝµÇ¾ú°í Á¡Â÷ ¹Ì¼¼Ç÷°üÀÇ ÇéÂø,
±¼°î, ±×¸®°í Ç÷°ü³»º®ÀÇ Á¶Á¶µµ°¡ Áõ°¡µÇ¾úÀ¸¸ç ÀÌ·¯ÇÑ ¼Ò°ßÀº 10Gy Á¶»ç±º¿¡ ºñÇØ 20Gy
Á¶»ç±º¿¡¼­ º¸´Ù ÇöÀúÇÏ¿´´Ù.
4. Åõ°úÀüÀÚÇö¹Ì°æÀû ¼Ò°ß»ó, ¹æ»ç¼± Á¶»ç·®¿¡ °ü°è¾øÀÌ Á¶»çÈÄ 3Àϱº¿¡¼­ ³»ÇǼ¼Æ÷ ¼¼Æ÷
ÁúÀÇ µ¹±âÇü¼ºÀÌ Áõ°¡µÇ¾ú°í ±× ÈÄ ³»ÇǼ¼Æ÷ÀÇ Á¾Ã¢ ¹× ¼¼Æ÷Áú µ¹±âÀÇ À¯ÇÕ»óÀÌ Áö¼ÓÀûÀ¸·Î
°üÂûµÇ¾úÀ¸¸ç, Á¶»çÈÄ 28ÀϱºÀÇ ÀϺο¡¼­´Â Ç÷°ü ³»ÇǼ¼Æ÷ÀÇ Æı«¿Í ±âÀú¸· ¼Ò½Çµµ °üÂûµÇ¾ú´Ù.
#ÃÊ·Ï#
The purpose of this study was to investigate the effects of irradiation on the
microvascular structure of the submandibular gland in rats.
For this study, 110 male rats were singly irradiated with the dose of 10Gy or 20Gy to
their neck region by 6MV X-irradiation and sacrificed on the 1st, 3rd, 7th, 14th and
28th day after irradiation.
The author observed distribution and structural changes of the microvasculature in rat
submandibular glands using a scanning electron microscope by forming vascular resin
casting.
The author observed ultrastructural changes of the endothelial cells using a
transmission electron microscope, and also histologic changes using a light microscope at
Hematoxylin and Eosin staining and PAS staining process.
The results of the irradiation effects on the microvasculature in rat submandibular
gland were as follows:
By light microscopic examination, the dilation of small vessels were observed until the
7th day after irradiation. After then, the vascular constriction and decrease in number of
small vessels were noticed. Changes were greater on 20Gy irradiated group than on 1
0Gy irradiated group. The reaction to PAS staining at acinar cells was decreased just
after irradiation, but gradually recoveree with days. There was no specific difference
between two irradiated groups.
By scanning electron microscopic examination, general findings on the two irradiated
groups were similar. The dilation of conduits and meandering were observed on the 3rd
day after irradiation. Decrease of capillary density and blunt ended small vessels were
appeared on the 7th day after irradiation. After that, findings of the tortuous and twisted
vascular running and coarseness of capillary lumen were increased. Changes were
greater on 20Gy irradiated group than on 10Gy irradiated group.
By transmission electron microscopic examination, increase of the formation of
cytoplasmic process was observed on the 3rd day after irradiation. After that, swelling
of endothelial cell and bridge formation of cytoplasmic processes were also observed, but
destruction of endothelial cell and loss of basement membrane were observed only on
200y irradiated group on the 28th day after irradiation.

Å°¿öµå

Irradiation; Microvasculature; Endothelial cell; Rat svbmandibular gland; Resin casting technique;

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