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EFFECTS OF THE SINGLE AND FRACTIONATED IRRADIATION ON THE MICROVASCULATURE OF THE RAT SUBMANDIBULAR GLAND

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Abstract

´ÜÀÏ ¹× ºÐÇÒ ¹æ»ç¼±Á¶»ç¿¡ µû¸¥ Ÿ¾×¼± ¹Ì¼¼Ç÷°ü°èÀÇ º¯È­¸¦ °üÂûÇϱâ À§ÇÏ¿© ¹é¼­ÀÇ ¾Ç
Çϼ±¿¡ ¼±Çü°¡¼Ó±â¿¡¼­ 6MV X¼±À» 150y ´ÜÀÏÁ¶»ç ¹× 4½Ã°£ °£°ÝÀ¸·Î 9Gy¸¦ 2ȸ ºÐÇÒÁ¶»ç
ÇÑ ÈÄ 1ÀÏ,3ÀÏ,7ÀÏ, 14ÀÏ ±×¸®°í 28ÀÏ¿¡ Èñ»ý½ÃÅ°°í H&E ¿°»ö ¹× PAS ¿°»öÇÏ¿© ±¤ÇÐÇö¹Ì
°æÀ¸·Î Á¶Á÷ÇÐÀû º¯È­¸¦ °Ë»öÇÏ¿´À¸¸ç, Ç÷°ü ·¹ÁøÁÖÇüÀ» Á¦ÀÛÇÏ¿© ¹Ì¼¼Ç÷°üÀÇ ºÐÆ÷¹Ðµµ, ÁÖ
Çà°æ·Î ¹× ÇüÅÂÇÐÀû º¯È­¸¦ ÁÖ»çÀüÀÚÇö¹Ì°æÀ¸·Î °üÂûÇÏ¿© ´ÙÀ½ÀÇ °á°ú¸¦ ¾ò¾ú´Ù.
1. ±¤ÇÐÇö¹Ì°æÀû ¼Ò°ßÀº ¹æ»ç¼±Á¶»çÈÄ 1Àϱº¿¡¼­ ¹Ì¼¼Ç÷°üÀÇ ºÐÆ÷¹Ðµµ°¡ °¨¼ÒÇÏ¿´À¸¸ç ´Ù
¼Ò È®ÀåµÈ ¾ç»óÀ̾ú°í, Á¶»çÈÄ 3Àϱº¿¡¼­ºÎÅÍ ¼ýÀûÁõ°¡°¡ ÀÌ·ç¾îÁ® Á¶»çÈÄ 7Àϱº¿¡¼­ ¹Ì¼¼
Ç÷°ü ºÐÆ÷¹ÐµµÀÇ Áõ°¡°¡ ¶Ñ·ÇÇÏ¿´À¸³ª, Á¶»çÈÄ 14Àϱº ÀÌÈÄ¿¡´Â ´Ù½Ã ºÐÆ÷¹Ðµµ°¡ °¨¼ÒÇÏ¿´
´Ù. ÀÌ·¯ÇÑ ¼Ò°ßÀº ºÐÇÒÁ¶»ç±º¿¡ ºñÇØ ´ÜÀÏÁ¶»ç±º¿¡¼­ ºÐ¸íÇÏ¿´´Ù.
2. PAS ¿°»ö¼Ò°ß¿¡¼­ ¼±¼¼Æ÷ÀÇ ¹ÝÀÀÁ¤µµ´Â ¹æ»ç¼±Á¶»çÈÄ 3Àϱº±îÁö °¨¼ÒµÇ¾ú´Ù°¡ Á¶»çÈÄ
7Àϱº¿¡¼­ ȸº¹µÈ ÈÄ, Á¶»çÈÄ 14Àϱº¿¡¼­´Â ´Ù½Ã °¨¼ÒµÇ¾ú°í Á¶»çÈÄ 28Àϱº¿¡¼­ ȸº¹µÇ´Â
¾ç»óÀ̾úÀ¸¸ç, ÀÌ·¯ÇÑ ¼Ò°ßÀº ºÐÇÒÁ¶»ç±º¿¡ ºñÇØ ´ÜÀÏÁ¶»ç±º¿¡¼­ º¸´Ù ÇöÀúÇÏ¿´´Ù.
3. ÁÖ»çÀüÀÚÇö¹Ì°æÀû ¼Ò°ß¿¡¼­ ¹Ì¼¼Ç÷°ü°èÀÇ Ãʱ⺯ȭ´Â Ç÷°ü ºÐÆ÷¹ÐµµÀÇ °¨¼Ò¿Í Ç÷°üÀÇ
È®Àå ¹× ¸¸°î»óÀ̾úÀ¸¸ç, ¹æ»ç¼±Á¶»çÈÄ 7Àϱº ¹× 14Àϱº¿¡¼­ Ç÷°üÀÇ Àç»ý¿¡ µû¸¥ ¹®ÇÕÇü¼º
¹× ºÐÆ÷¹Ðµµ°¡ Áõ°¡ÇÏ¿´À¸¸ç ÁÖÇàÀÌ º¸´Ù ¿Ï¸¸ÇØÁ³°í, Á¶»çÈÄ 28Àϱº¿¡¼­´Â ºÐÆ÷¹Ðµµ°¡ ´Ù
½Ã °¨¼ÒµÇ¸ç ÁÖÇàÀÌ Á¤¿¬ÇØÁö´Â °æÇâÀ» º¸¿´´Ù. ÀÌ·¯ÇÑ ¼Ò°ßÀº ºÐÇÒÁ¶»ç±º¿¡ ºñÇØ ´ÜÀÏÁ¶»ç
±º¿¡¼­ ¸íÈ®ÇÏ¿´´Ù.
#ÃÊ·Ï#
The purpose of the study was to investigate the effects of the single and fractionated
irradiation on the microvascular structure of the submandibular gland in rats. For this
study, 90 Sprague-Dawley strain rats were irradiated to their neck region with equal
split doses of 9Gy for a 4 hours interval and 150y single dose by 6MV X-irradiation
and sacrificed on the 1st, 3rd, 7th, 14th and 27th day after irradiation.
The author observed histological changes at Hematoxylin and Eosin staining and PAS
staining under a light microscope, and also observed distribution and structural changes
of the microvasculature in rat submandibular gland using a scanning electron microscope
by forming vascular resin casting.
The results were as follows :
1. In the light microscopic examination, the microvasculature was slightly dilated and
decreased in number on the 1st day after irradiation, and increase in number of
microvasculature was observed on the 3rd day after irradiation. And then distribution of
microvasculature was markedly increased on the 7th day after iradiation, but decreased
on th 14th day after irradiation again. Such changes were greater in the single
irradiated group than in the fractionated irradiated group.
2. The reaction to PAS staining on glandular cell was decreased on the 1st and the
3rd day after irradiation, and recovered on the 7th day after irradiation. The reaction
was decreased on the 14th day after irradiation again, and recovered on the 28th day
after irradiation. Changes were more apparent in the single irradiated group.
3. In the scanning electron microscopic examination, early changes of microvasculature
were decreased capillary density, dilation of conduits and meandering. Increased capillary
dentsity or anastomosis due to vascular reproduction and smooth curved running were
observed on the 7th and 14th day after irradiation. Decreased capillary and smooth
running tendency were observed on the 28th day after irradiation again. Such changes
were greater in the single irradiated group than in the fractionated irradiated group.

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