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ULTRASTRUCTURAL STUDY OF THE FIBROBLAST REMODELING IN THE RADIATION- IMPAIRED WOUND HEALING IN THE TONGUE OF THE RAT

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Abstract

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1. ¹æ»ç¼±Á¶»ç±º¿¡¼­ ¼¶À¯¾Æ¼¼Æ÷µéÀÇ ¼¼Æ÷µ¹±â°¡ °ÅÀÇ °üÂûµÇÁö ¾Ê¾ÒÀ¸¸ç ¼¼Æ÷¼Ò±â°üÀÇ
°¨¼Ò°¡ °üÂûµÇ¾ú°í ÇÙ³»±¸Á¶°¡ ¶Ñ·ÇÇÏ¿´´Ù.
2. ¹æ»ç¼±Á¶»ç±º¿¡¼­ °üÂûµÇ´Â ±³¿ø¼¶À¯ÀÇ Æò±Õ¹ÝÁö¸§ÀÌ ´ëÁ¶±º¿¡ ºñÇÏ¿© °¨¼ÒÇÏ¿´À¸³ª
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3. ¹æ»ç¼±Á¶»çÈÄ 1ÀÏ Ã¢»ó±ºº¸´Ù 7ÀÏ Ã¢»ó±º¿¡¼­ ¹æ»ç¼±Á¶»ç·Î ÀÎÇÑ Ä¡À¯Áö¿¬ ¹× ¼¶À¯¾Æ
¼¼Æ÷ÀÇ º¯¼ºÀ̳ª ±³¿øÁúÀÇ ¹ÝÁö¸§°¨¼Ò°¡ º¸´Ù ½ÉÇÏ¿´´Ù(p<0.05).
#ÃÊ·Ï#
Radiation-impaired wound healing in animal experiments was believed to be an
another logical experimental model to understand the wound healing mechanism in
patients. The purpose of this study was to reveal the block point which would result in
impaired healing.
Twenty four rats(Sprague-Dawley strains) were divided into two groups according to
the time interval between irradiation and wounding. Group ¥°, observing the healing
effect on the 1st day and Group ¥± are the healing effects on the 7th days after
irradiation to the wound of the rat tongue. Experimental animals were sacrificed 3, 6, 12,
and 24 hours after wounding. The specimens were examined by the light microscope
and transmission electron microscope.
The following results were obtained
1. Fibroblasts in both groups showed degenerative changes which were dilated
mitochondria and rER, reduced microorganelle, vacuoles and little cytoplasmic process.
2. Average length between bands and quantity of the newly produced collagen fibers
around fibroblasts remained unchanged against control group.
3. The severity of degenerative change of the fibroblast and impairment of wound
healing including shortening of the thickness of collagen fibers were more severe in the
group ¥± than in the group ¥°.

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