Àá½Ã¸¸ ±â´Ù·Á ÁÖ¼¼¿ä. ·ÎµùÁßÀÔ´Ï´Ù.

Áã¿¡¼­ ½ÇÇèÀû ô¼ö°øµ¿ÁõÀÇ Á¶Á÷º´¸®¼Ò°ß ¹× º¸ÇàÃßÀû°Ë»ç Experimental Syringomyelia in the Rat : Histopathology of Spinal Cord and Kinematic Analysis of Locomotion

´ëÇѽŰæ¿Ü°úÇÐȸÁö 1997³â 26±Ç 1È£ p.29 ~ 39
¼Ò¼Ó »ó¼¼Á¤º¸
Á¶°æ¼®/Kyung Suok Cho ÇãÇÊ¿ì/¹ÚÃá±Ù/°è´ë°ï/±è´Þ¼ö/°­Áرâ/PWMadsen/RPYezerski/Pil Woo Huh/Choon Kum Park/Dae Kon Kye/Dal Soo Kim/Joon Ki Kang/PW Madson/RP. Yezerski

Abstract

Excitatory Amino Acid(EAA)ÀÇ ³ú¿¡ ´ëÇÑ ½Å°æµ¶¼ºÈ¿°ú¿¡ ´ëÇؼ­´Â Àß ¾Ë·ÁÁ³Áö¸¸ ô¼ö
¿¡ ´ëÇÑ µ¶¼º¿¡ ´ëÇؼ­´Â Àß ¾Ë·ÁÁöÁö ¾Ê¾Ò´Ù. EAAÀÇ agonistÀÎ Äû½ºÄ÷»êÀ» ÈòÁãÀÇ Ã´¼ö¿¡
ÁÖ»çÇÏ¿© ô¼ö½Å°æ¼¼Æ÷µ¶¼º¿¡ ´ëÇÑ Á¶»ç¸¦ ½Ç½ÃÇÏ¿´°í, Äû½ºÄ÷»êÀ» ÁÖ»çÇÏ°í °üÂûÇÏ´Â ½Ã±â
¿¡ µû¶ó¼­ Áã´Â 4°³ÀÇ ±ºÀ¸·Î ³ª´©¾ú´Âµ¥ Á¦ I±ºÀº 7¡­15ÀÏ, Á¦ ¥±±ºÀº 16¡­24ÀÏ Á¦ ¥²±ºÀº
25¡­34ÀÏ, Á¦ ¥³±º 35¡­49ÀϱîÁö »ýÁ¸ÇÑ Áã·Î ºÐ·ùÇÏ¿´´Ù. 0.3¿¡¼­ 2§¡ÀÇ Äû½ºÄ÷»êÀ» 0.8¡­
3mM. 83mM, 125mMÀÇ ³óµµ·Î ÇϺÎÈä¼ö(lowed thoracic spinal cord) ¹× »óºÎ¿ä¼ö(upped
lumbar spinal cord)ÀÇ ÈĹ濡¼­ ÁÖ»çÇÏ°í Á¶Á÷°Ë»ç¸¦ ½Ç½ÃÇÏ¿´´Ù. Äû½ºÄ÷»êÀ» ô¼ö ³»¿¡ ÁÖ
»ç Àü ±×¸®°í ÁÖ»ç ÈÄ ÄÄÇ»Å͸¦ ÀÌ¿ëÇÑ ÃßÀû°Ë»ç·Î ÁãÀÇ º¸ÇàÀ» ÀÚ¼¼È÷ Á¶»çÇÏ¿´´Ù. ½ÇÇè°á
°ú´Â ô¼ö ÈĹæ ÇÑÂÊ(unilateral)¿¡¼­ ÁÖ»çÇÏ¿´´Âµ¥. µ¿Ãø ¶Ç´Â ¾çÃø¿¡ ô¼ö½Å°æ¼¼Æ÷°¡ º¯¼º
(degeneration)µÈ °ÍÀ» ¸ðµç µ¿¹°¿¡¼­ °üÂûµÇ¾ú°í 25¸¶¸® Áß »ý¸®½Ä¿°¼ö¸¦ ÁÖ»çÇÑ 2¸¶¸®¸¦
Á¦¿ÜÇÏ°í´Â 23¸¶¸®¿¡¼­ ô¼ö³» ÁÖ»çºÎÀ§¿¡ ¿°Áõ¼ºº¯È­(inflammatory reaction) ¹× ô¼ö ³»¿¡
°øµ¿(Cavity)ÀÌ ¹ß»ýµÇ¾ú´Ù Á¶Á÷°Ë»ç»ó ÁÖ»çºÎÀ§¿¡´Â ÁøÇÏ°Ô ¿°»öµÇ¾ú°í. glial fibrillary
acid protein(GFAP)ÀÇ Áõ°¡°¡ º¸¿´°í, hypertrophied neuronal profile¼Ò°ßÀÌ º¸¿´´Ù GFAP
ÀÇ ¸é¿ªÈ­Çп°»ö¿¡¼­´Â ½Å°æÀÌ º¯¼ºµÈ ºÎÀ§¿Í °øµ¿ÀÌ Çü¼ºµÈ ºÎÀ§¿¡ ¿°»öÀÌ ´õ¿í Áõ°¡µÈ ¼Ò
°ßÀÌ º¸¿´´Ù. Áã º¸Çà°Ë»ç»ó Äû½ºÄ÷»ê ÁÖ»çÀü(2.02¡¾0.12§¯) º¸´Ù ÁÖ»ç ÈÄ 1ÁÖ(1.53¡¾0.09§¯)
¹× 3ÁÖ 0.52¡¾0.14§¯) ÈÄ¿¡´Â °ÉÀ½ÀÇ ³ôÀÌ°¡ ÁÙ¾îµé¾úÀ¸³ª 5ÁÖ ÈÄ(1.83¡¾0.14§¯)¿¡´Â Á¤»ó Ä¡
·Î ȸº¹µÇ¾ú´Ù ÀÌ °á°ú·Î ¹Ì·ç¾î ÀÌ ½ÇÇèÀº EAAÀÇ Ã´¼ö½Å°æ¼¼Æ÷Á¶Á÷¿¡ ´ëÇÑ µ¶¼º È¿°ú ¹×
½Å°æº¯¼ºÈÄ¿¡ ô¼ö³× °øµ¿(cavity)ÀÇ ¹ß»ý¿¡ ´ëÇÑ º´¸®ÇÐÀû ±âÀüÀÇ ±Ô¸í¿¡ ´ëÇÑ ÁÁÀº ¸ðµ¨
·Î »ç·áµÇ¸ç, ÄÄÇ»Å͸¦ ÀÌ¿ëÇÑ º¸ÇàÃßÀû°Ë»ç´Â ô¼ö¼Õ»ó ÈÄ °ÉÀ½ÀÇ ¹Ì¼¼ÇÑ ÀÌ»óÀ» ã¾Æ³»´Â
µ¥ À¯¿ëÇÑ ¹æ¹ýÀ¸·Î »ç·áµÈ´Ù.
#ÃÊ·Ï#
The neurotoxic effects of excitatory amino acids(EAAs) in the brain are well
documented, but their toxicity in the spinal cord has not been throughly studied.
Intraspinal microinjections of quisqualic acid(QA) were done to evaluate its neurotoxic
effects on neurons in the adult rat spinal cord. Animals were divided into four groups
based on times of post-QA injections, ranging from 7-49 days. Total volume injected in
each group ranged from 0.3 to 2.0§¡ of QA and normal saline(vehicle) were injected in
lower thoracic and upper lumbar spinal intraspinal injection of QA and saline. Our
results showed that unilateral injections of QA produced either unilateral or bilateral
neuronal degenerations during the survival period. This was accompanied by an
inflammatory reaction and initiation of pathological process leading to spinal cavitation in
23 of 25 animals. Segments affected by QA infections showed darkly stained.
hypertroophed neuroal profiles, and an increased expression of glial fibrillary acidic
protein(GFAP). Immunostaining for GFAR was especially intense in the areas of
neuronal degeneration and around the border of spinal cavities. The kinematic analysis
of locomotion in the right hindlimb showed a decrease in gait height(pre-injection level :
2.07¡¾0.12 cm) at post QA injection 1 week(1.53¡¾0.09cm), but returned to pre-injections.
Results of this study have shown that the intranspinal injection of QA may be a
suitable model to study cellular events of EAA-induced neurotoxicity on spinal neurons
and the pathological process of spinal cavitation following neuronal degeneration.
Computerized motion analysis system was useful for detection of the neurological
deficits from minor spinal cord injury.

Å°¿öµå

EAA; Syringgomyelia; Kinematic analysis; Neuronal degeneration.;

¿ø¹® ¹× ¸µÅ©¾Æ¿ô Á¤º¸

 

µîÀçÀú³Î Á¤º¸

KoreaMed
KAMS