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°£¼¼Æ÷ Àå±â º¸Á¸À» À§ÇÑ ÀûÁ¤ ³Ãµ¿º¸Á¸¿¡ °üÇÑ ¿¬±¸-¥± Cryopreservation of Rat Hepatocytes for the Use of Primary Culture

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À̺´¿í ( Lee Byoung-Wook ) 
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ÀÌÁ¤ÀÏ ( Lee Joung-Il ) 
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Abstract

¸ñÀû: ¼¼Æ÷ ³Ãµ¿º¸Á¸½Ã ³Ãµ¿ ¼Óµµ°¡ Áö³ªÄ¡°Ô ´À¸®¸é ¼¼Æ÷¿¡¼­ ¹°ÀÌ ºüÁ®³ª°¡ ¿ëÁú³óµµ°¡ Áõ°¡ÇÏ¿© ¼Õ»óÀ» ¹Þ°í, ³Ê¹« ºü¸£¸é ¼¼Æ÷³» ¾óÀ½ÀÌ Çü¼ºµÇ¾î ¼Õ»ó¹Þ°Ô µÈ´Ù. ¶ÇÇÑ ¿Âµµ¸¦ ÀÏÁ¤ÇÏ°Ô °­ÇϽÃÅ°¸é À¶ÇÕ¿­ÀÌ ¹ß»ýÇÏ¿© ¼¼Æ÷¿¡ ¼Õ»óÀÌ ÀϾ ¼ö ÀÖ´Ù. ÄÄÇ»ÅÍ ÇÁ·Î±×·¥À» ÀÌ¿ëÇÑ ³Ãµ¿¿¡¼­´Â ¿Âµµ º¯È­¸¦ °¨ÁöÇÒ ¼ö ÀÖ¾î ÀÌ·¯ÇÑ ¼Õ»óÀ» ÃÖ¼ÒÈ­ÇÒ ¼ö ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â °£¼¼Æ÷ ³Ãµ¿º¸Á¸À» À§ÇÏ¿© µÎ°¡Áö ÇÁ·Î±×·¥À» ¼³Á¤ÇÏ¿© º¸Á¸È¿°ú¸¦ ºñ±³ÇÏ¿´°í, Àå±â°£ÀÇ º¸Á¸ È¿°ú¿¡ ´ëÇؼ­µµ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù.

´ë»ó ¹× ¹æ¹ý: 200£ç³»¿ÜÀÇ ÁÖ¿¡¼­ collagense ¹®¸Æ°ü·ù¹ýÀ¸·Î °£¼¼Æ÷¸¦ ºÐ¸®ÇÏ¿© ³Ãµ¿º¸Á¸¿¡ »ç¿ëÇÏ¿´´Ù. ³Ãµ¿º¸Á¸¾×ÀÇ Á¶¼ºÀº º¯Çü Chee ¹è¾ç¾×¿¡ ¿ìžÆÇ÷û 20%, ³Ãµ¿¼Õ»ó º¸È£Á¦ÀÎ DMSO´Â 10%(4% - >16% 2´Ü°è ÷°¡) ¸¦ »ç¿ëÇÏ¿´´Ù. ÄÄÇ»Å͸¦ ÀÌ¿ëÇÑ ³Ãµ¿ÀÇ ÇÁ·Î±×·¥ ¥°Àº Àü¹ÚÀûÀÎ ³Ãµ¿¼Óµµ°¡ ºÐ´ç 1.33¡É¿´°í, À¶ÇÕ¿­À» ³·Ãß±â À§ÇÏ¿© ´ÜÀÏ Ãæ°Ý³Ã°¢(shock cooling)À» ÀÌ¿ëÇÏ¿´À¸¸ç, ÇÁ·Î±×·¥ ¥±´Â ºÐ´ç 2¡É ¼Óµµ¿¡ 2´Ü°è Ãæ°Ý³Ã°¢À» ÀÌ¿ëÇÏ¿´´Ù. ³Ãµ¿º¸Á¸ 1°³¿ù ¹× 6°³¿ù ÈÄ ¼¼Æ÷»ýÁ¸À²°ú ¹è¾ç ¼¼Æ÷ºÎÂø·üÀ» ºñ±³ÇÏ¿´À¸¸ç, º¸Á¸¾×³» Æ÷ÇԵǴ ¼¼Æ÷ ¼ö ¹× Çغù ¿Âµµ¿¡ µû¸¥ º¯È­µµ °üÂûÇÏ¿´´Ù.

°á°ú: ÇÑ´Þ°£ ³Ãµ¿º¸Á¸ÇÑ ÈÄÀÇ ¼¼Æ÷»ýÁ¸À²Àº ÇÁ·Î±×·¥¥°¿¡ ºñÇÏ¿© ÇÁ·Î±×·¥¥±°¡ ´Ù¼Ò ¿ì¼öÇÏ¿´À¸¸ç, ¼¼Æ÷ ³óµµ 2¡¿106/§¢¿¡¼­ °¡Àå ¿ì¼öÇÑ °á°ú¸¦ º¸¿© ´Ù¸¥ °æ¿ì º¸´Ù 10-20% Á¤µµ ³ôÀº 74.5¡¾2.5%À» ³ªÅ¸³Â´Ù(p<0.05). ¹è¾ç ¼¼Æ÷ºÎÂø·üÀº 50% ³»¿Ü·Î Å« Â÷ÀÌ´Â ¾ø¾úÀ¸³ª 0.1¡¿106/§¢ ³óµµ¿¡¼­´Â ´Ù¼Ò ³·¾Ò´Ù. Çغù ¿Âµµ´Â 37¡É¿¡¼­ ¼¼Æ÷»ýÁ¸À²Àº 51.6¡¾2.2%¿´°í, 40¡É¿¡¼­ 60.4¡¾0.9%·Î 10% °¡±îÀÌ Çâ»óµÇ¾ú´Ù(p=0.0199). 6°³¿ù ÀÌ»ó º¸°üÇÏ¿´À» ¶§ ¼¼Æ÷»ýÁ¸À²Àº ÇÁ·Î±×·¥¥°¿¡¼­´Â 38.2¡¾5.5%, ÇÁ·Î±×·¥¥±´Â 45.4¡¾1.6%·Î 1°³¿ù ³Ãµ¿º¸Á¸¿¡ ºñÇÏ¿© À¯ÀÇÇÏ°Ô °¨¼ÒÇÏ¿´À¸³ª, ¹è¾ç ¼¼Æ÷ºÎÂø·üÀº 50% ³»¿Ü·Î Å©°Ô º¯ÇÏÁö ¾Ê¾Ò´Ù. °á·Ð: ÇÁ·Î±×·¥¥±¿¡¼­ °£¼¼Æ÷ ³Ãµ¿º¸Á¸ È¿°ú°¡ ´Ù¼Ò ¿ì¼öÇÏ¿´À¸¸ç, ¼¼Æ÷ ³óµµ´Â 2¡¿106/§¢¿¡¼­ ÁÁÀº º¸Á¸ È¿°ú¸¦ º¸¿´´Ù. Çغù ¿Âµµ´Â 37¡Éº¸´Ù 40¡É¿¡¼­ ÁÁÀº È¿°ú¸¦ º¸¿´´Ù. ±×·¯³ª ÃÖÁ¾ÀûÀÎ ³Ãµ¿º¸Á¸ È¿°ú´Â Àü¹ÝÀûÀ¸·Î 35%¿¡ ¹ÌÄ¡Áö ¸øÇÏ¿´À¸¸ç, Àå±â°£ º¸Á¸ ÈÄ¿¡´Â ´õ¿í °¨¼ÒÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³ª º¸´Ù È¿°úÀûÀÎ ³Ãµ¿º¸Á¸ ÇÁ·Î±×·¥ °³¹ß¿¡ ´ëÇÑ Áö¼ÓÀûÀÎ ¿¬±¸°¡ ÇÊ¿äÇÒ °ÍÀ¸·Î »ý°¢ÇÏ¿´´Ù.

Background/Aims:The cryopreservation of primary hepatocytes could avoid unnecessary isolation of hepatocytes and supply them on demand. We compared two programs of computer-controlled freezing methods on the efficacy of hepatocyte cryopreservation.

Methods: Rat hepatocytes were cryopreserved by computer-controlled freezing methods. In program I, the overall cooling rate was 1.33¡É/min and single-step shock cooling was used to reduce the latent heat of fusion. In program
II, the cooling rate of 2¡É/min and two-step shock cooling were used. Two programs were compared in regard to hepatocyte viability and long-term cryopreservation and thawing temperature were also evaluated.

Results: The hepatocyte viability showed the highest value of 74.5¡¾2.5% when cryopreserved using the program II and at 2¡¿106/§¢ cell concentration in cryopreservation medium. The hepatocyte attachment rate on culture was similar in every occasion, more or less 50%. The hepatocyte viability was improved by 10% when thawed at 40¡É, compared to the value at 37¡É in the program I. The hepatocyte viability was decreased to 38.2¡¾5.5% in the program I and 45.4¡¾1.6% in the program II after long-term cryopreservation.

Conclusion: The program II showed better survival of hepatocytes at 2¡¿106/§¢ cell concentration. However, overall efficacy of hepatocyte cryopreservation was less than 35% and decreased more after long-term cryopreservation. Further studies are needed to develop a more effective program for hepatocyte cryopreservation.

Å°¿öµå

°£¼¼Æ÷; ³Ãµ¿º¸Á¸; Computer-programmable freezing; Cryopreservation; Hepatocytes; Computer-prgrammable freezing;

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