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Degradation Characteristics of Cross-linked Hyaluronic Acid Membrane
Gu Hyun Cho and Seong Ihl Cheong¢Ó
Department of Chemical Engineering and Nano-Bio Technology, Hannam University, 461-6 Jeonmin-dong,
Yuseong-gu, Daejeon 305-811, Korea
(Received December 3, 2009, Revised December 22, 2009, Accepted December 22, 2009)

¿ä ¾à: Á¶Á÷ °øÇпë ÁöÁöü·Î »ç¿ëÇÒ ¸ñÀûÀ¸·Î Á¦Á¶µÈ °¡±³µÈ lactide/hyaluronic acid (LA/HA) ¸·ÀÇ ºÐÇØ Æ¯¼ºÀ» »ìÆ캸 ¾Ò´Ù. °¡±³Á¦ 1,3-butadiene diepoxide (BD), 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDC)¸¦ »ç¿ëÇÏ¿© ¾ò¾îÁø °íºÐÀÚ ¸·À» 37¡ÆC·Î Á¶ÀýµÈ Ç׿ÂÁ¶¿¡¼­ Áõ·ù¼ö¿¡ ħÀü½ÃÄÑ ºÐÇؽÃÄ×´Ù. °¡±³¹ÝÀÀ½Ã LA/HA ¸ôºñ°¡ ÀÛÀ»¼ö·Ï, °¡±³Á¦ÀÇ ³óµµ°¡ ÀÛÀ»¼ö·Ï »ý¼ºµÈ °íºÐÀÚ ¸·ÀÇ ºÐÇؼӵµ°¡ Áõ°¡ÇÏ¿´´Ù. ºÐÇØµÉ ¶§ ¸·ÀÇ ±¸Á¶ º¯È­¸¦ »ìÆ캸±â À§ÇØ ºÐÇØ Àü, 3ÀÏ, 6ÀÏ, 9ÀÏ ÈÄ ÀÇ ½Ã·á¸¦ äÃëÇÏ¿© ÇÙÀڱ⠰ø¸í ºÐ±¤¹ýÀ¸·Î ºÐÀÚ ±¸Á¶¸¦ »ìÆ캸¾Ò´Ù. EDC·Î °¡±³½ÃŲ ¸·ÀÇ °æ¿ì ½Ã°£ÀÌ Áö³²¿¡ µû¶ó HAEDC
°áÇÕ±¸Á¶´Â ¼­¼­È÷ ºÐÇصǴµ¥ HA-LA °áÇÕ±¸Á¶´Â ±Þ°ÝÈ÷ ºÐÇصǾî 6ÀÏ ÈÄ¿¡´Â ¿ÏÀüÈ÷ ¼Ò¸êµÇ¾ú´Ù. BD·Î °¡±³½ÃŲ ¸·ÀÇ °æ¿ì °¡±³µÈ °áÇÕ ±¸Á¶ ¸ðµÎ ¼­¼­È÷ ºÐÇصǾúÀ¸¸ç 3ÀÏ, 6ÀÏÀÌ Áö³ª¸é¼­ HA-BD °áÇÕ ±¸Á¶´Â ¿ø·¡ÀÇ 89, 83%°¡ À¯ÁöµÇ¾úÀ¸³ª HA-LA °áÇÕ ±¸Á¶´Â ¿ø·¡ÀÇ 83, 65%·Î À¯ÁöµÇ¾ú´Ù. ºÐÇØµÈ ¸·À» ÀüÀÚ Çö¹Ì°æÀ¸·Î ÃøÁ¤ÇÑ °á°ú ºÐÇØ ÀüÈÄ Ç¥¸é¿¡¼­ ±â°øÀÇ ¹Ðµµ´Â Å©°Ô Â÷À̳ªÁö ¾Ê¾ÒÀ¸¸ç, Ç¥¸é°ú Ãø¸éÀÇ ±¸Á¶µµ Å©°Ô Â÷ÀÌ°¡ ³ªÁö ¾Ê¾Æ Á¶Á÷°øÇпë Àç·á·Î½á »ç¿ëÇÒ ¶§ ¾Æ¹«·±
¹®Á¦°¡ ¾ø´Â °ÍÀ¸·Î °üÂûµÇ¾ú´Ù.
Abstract: The degradation characteristics of cross-linked lactide/hyaluronic acid (LA/HA) membranes were investigated for purpose of applying to tissue engineering. The lactide/hyaluronic acid cross-linked with 1,3-butadiene diepoxide (BD) and 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDC) was degradated in deionized water in water bath at 37¡ÆC. As the LA/HA mole ratio or crosslinking agent concentration decreased, the degradation rate of the crosslinked membranes
increased. In order to investigate the structure change of the membrane in the degradation process, the control sample and 3, 6, 9 days-degradated samples were analysed by the nuclear magnetic resonance spectroscopy. In case of the membranes crosslinked with EDC, the HA-EDC bonding structure was degradated slowly whereas the HA-LA bonding structure was
degradated quickly and dissappeared completely after 6 days. In case of the membranes crosslinked with BD, all the crosslinked bonding structure degradated slowly. The HA-BD bonding structure maintained its original state about 89, 83% in case of 3, 6 days-degardated samples respectively whereas the HA-LA bonding structure maintained its original state about 83, 65%. The scanning electron microscopy of the degradated membranes showed that the pore density in the surface, and the structure in the surface and cross section, of the before and after-degradation membranes did not change greatly, so the
membranes was shown to be applied to materials for tissue engineering.
Keywords: hyaluronic acid, lactide, crosslinking, degradation, tissue engineering


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