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EVALUATION OF THE VIABILITY OF PERIODONTAL LIGAMENT CELL IN RAT TEETH USING SLOW CRYOPRESERVATION METHOD WITH MAGNETIC FIELD

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¾ÈÇöÁ¤ ( Ahn Hyun-Jung ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Á¸Çб³½Ç
±èÀǼº ( Kim Eui-Seong ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Á¸Çб³½Ç
±èÁø ( Kim Jin ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
±è´ö¿ø ( Kim Duck-Won ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Á¸Çб³½Ç
±è±â¿­ ( Kim Ki-Yeol ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Á¸Çб³½Ç
ÀÌÂù¿µ ( Lee Chan-Young ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Á¸Çб³½Ç
À̽ÂÁ¾ ( Lee Seung-Jong ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Á¸Çб³½Ç

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº ÈòÁã »ó¾Ç ´ë±¸Ä¡¸¦ ¹ß°ÅÇÏ¿© ÀÚ±âÀå Àú¼Ó ³Ãµ¿º¸°ü¹ýÀ» ÀÌ¿ëÇÏ¿© ³Ãµ¿ ½Ã Ä¡ÁÖÀδ뼼Æ÷ÀÇ È¯¼ºµµ ¹× ¼¼Æ÷ »ç¸êµµ¸¦ MTT °Ë»ö¹ý°ú TUNEL °Ë»ç¸¦ ÀÌ¿ëÇÏ¿© ÃøÁ¤ÇÏ°íÀÚ ÇÏ¿´´Ù. 4ÁÖ·ÉÀÇ ¾ÏÄÆ Sprague-Dawley°è ÈòÁãÀÇ »ó¾Ç Á¿ì Á¦1,2´ë ±¸Ä¡¸¦ ¹ß°ÅÇÏ¿© °¢ ±º ´ç 12°³ÀÇ Áã Ä¡¾Æ¸¦ MTT°Ë»ö¿¡ ÀÌ¿ëÇÏ¿´°í 6°³ÀÇ Ä¡¾Æ¸¦ TUNEL °Ë»ç¿¡ ÀÌ¿ëÇÏ¿´´Ù. ½ÇÇ豺Àº 5°³±ºÀ¸·Î ´ëÁ¶±ºÀº Áï½Ã ¹ßÄ¡±ºÀ̸ç 4 ³ÃÀå°í¿¡¼­ 1ÁÖÀÏ°£ º¸°üÇÑ ³ÃÀ屺, ¹ßÄ¡ ÈÄ µ¿ÇعæÁöÁ¦ 󸮰úÁ¤À» °ÅÃÄ -196ÀÇ ¾×È­Áú¼Ò¿¡ ³Ö¾î ±Þ¼Ó ³Ãµ¿ÇÑ ¾×È­Áú¼Ò±º, 217 mA, 60 Hz, 1 GÀÇ ÀÚ±âÀåÀ» ÀÌ¿ëÇÏ¿© -0.3/min ÀÇ ¼Óµµ·Î -20±îÁö ³Ãµ¿ ÈÄ -196·Î ±Þ¼Ó ³Ãµ¿ÇÑ ÀÚ±âÀ屺, -0.3/minÀÇ ¼Óµµ·Î -20±îÁö ³Ãµ¿ ÈÄ -196¿¡ ±Þ¼Ó ³Ãµ¿ÇÑ Àú¼Ó ³Ãµ¿±ºÀ¸·Î ³ª´©¾ú´Ù. º¸Á¸¾×Àº F mediumÀ» »ç¿ëÇßÀ¸¸ç µ¿ÇعæÁöÁ¦·Î 10% dimethyl sulfoxide (DMSO)¸¦ »ç¿ëÇÏ¿´´Ù. Ä¡±Ù¸éÀ» ´ÜÀ§¸éÀûÀ¸·Î Ç¥ÁØÈ­Çϱâ À§ÇØ MTT ÃøÁ¤°ªÀ» Eosin ¿°»ö ÈÄ 530 nm¿¡¼­ ÃøÁ¤ ÇÑ Èí±¤µµ °ªÀ¸·Î ³ª´©¾ú´Ù. TUNEL °Ë»ç ½Ã °¢ Á¶Á÷½½¶óÀ̵忡¼­ 400¹è Å©±âÀÇ Çö¹Ì°æ ½Ã¾ß¿¡¼­ ÀÓÀÇ·Î ¼¼ ºÎºÐÀ» ÁöÁ¤ÇÏ¿© Á¤»ó ¼¼Æ÷¼ö¿Í ¾ç¼º ¼¼Æ÷¼ö¸¦ ¼¼¾î ±× ºñÀ²À» °è»êÇÏ¿© °¢ ½ÇÇ豺 ´ç Æò±ÕÄ¡¸¦ ±¸ÇÏ¿´´Ù. Åë°è ºÐ¼®À» À§ÇØ one way ANOVA¸¦ ½ÃÇàÇÏ¿´À¸¸ç »çÈÄ°ËÁ¤À¸·Î Scheffe¿Í Tukey HSD¹æ¹ýÀ» ½èÀ¸¸ç °á°ú´Â ´ÙÀ½°ú °°´Ù. MTT°Ë»ö¿¡ ÀÇÇÑ Èí±¤µµ¸¦ Eosin¿°»ö ÈÄ ÃøÁ¤ÇÑ Èí±¤µµ·Î ³ª´« °ª¿¡¼­´Â ÀÚ±âÀ屺Àº Áï½Ã ¹ßÄ¡±ºº¸´Ù ³·Àº ¼¼Æ÷È°¼ºÀ» º¸¿´°í (p < 0.05) ¾×È­Áú¼Ò±º, Àú¼Ó ³Ãµ¿±º°ú´Â Åë°èÀûÀ¸·Î À¯ÀǼº ÀÖ´Â Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù. ±×·¯³ª ÀÚ±âÀ屺Àº ¾×È­Áú¼Ò±º, Àú¼Ó ³Ãµ¿±º°ú ÇÔ²² ³ÃÀ屺º¸´Ù´Â ³ôÀº ¼¼Æ÷ È°¼ºµµ¸¦ º¸¿´´Ù (p < 0.05) TUNEL °Ë»ç °á°úµµ ÀÚ±âÀ屺Àº Áï½Ã ¹ßÄ¡±ºº¸´Ù Ä¡ÁÖÀδëÀÇ ¼¼Æ÷»ç¸êµµ°¡ ³ô¾ÒÀ¸³ª (p < 0.05) Àú¼Ó ³Ãµ¿±º°ú ¾×È­ Áú¼Ò±º°ú´Â Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù. ÀÚ±âÀ屺Àº ³ÃÀ屺º¸´Ù ¼¼Æ÷»ç¸êµµ°¡ ³·¾ÒÀ¸¸ç ³ÃÀ屺Àº ¸ðµç ±º Áß¿¡¼­ ¼¼Æ÷ »ç¸êµµ°¡ °¡Àå ³ô¾Ò´Ù (p < 0.05).

The purpose of this study was to evaluate the viability of periodontal ligament cell in rat teeth using slow cryopreservation method with magnetic field through MTT assay and TUNEL test. For each group, 12 teeth of 4 weeks old white female Sprague-Dawley rat were used for MTT assay, and 6 teeth in TUNEL test. The Maxillary left and right, first and second molars were extracted as atraumatically as possible under tiletamine anesthesia. The experimental groups were group1 (immediately extraction), group 2 (cold preservation at 4 for 1 week), group 3 (rapid cryopreservation in liquid nitrogen), group 4 (slow cryopreservation with magnetic field of 1 G), and group 5 (slow cryopreservation). F medium was used as preservation medium and 10% DMSO as cryoprotectant. After preservation and thawing, the MTT assay and TUNEL test were processed. One way ANOVA and Scheffe method were performed at the 95% level of confidence. The value of optical density obtained after MTT analysis was divided by the value of eosin staining for tissue volume standardization. In both MTT assay and TUNEL test, it had showed no significant difference among group 3, 4, and 5. And group 3 had showed higher viability of periodontal ligament cell than group 2. From this study, slow cryopreservation method with magnetic field can be used as one of cryopreservation methods.

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TUNEL;Periodontal ligament cell;MTT;Magnetic field;Cryopreservation

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