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A MOLECULAR BIOLOGIC STUDY ON BIOCOMPATIBILITY OF METALLIC DENTAL MATERIALS USED FOR CHILDREN WITH CULTURED HUMAN GINGIVAL FIBROBLASTS

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±èÁÖ¹Ì, Á¶ºÀÇý, ±èÁöÇö,
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±èÁֹ̠(  ) - ºÎ»ê´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
Á¶ºÀÇý (  ) - ºÎ»ê´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
±èÁöÇö (  ) - ºÎ»ê´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

¼Ò¾ÆÄ¡°ú ÀÓ»ó¿¡ ÈçÈ÷ »ç¿ëµÇ´Â 3Á¾ÀÇ ±Ý¼ÓÀç¿¡ ÀÇÇÑ ÀÎü ¼¶À¯¸ð¼¼Æ÷(HGF-1)¸¦ ÀÌ¿ëÇÏ¿© ¼¼Æ÷µ¶¼º¿¡ ´ëÇÑ ¼¼Æ÷Àû ¹× ºÐÀÚÀû Á¢±ÙÀ» ½ÃµµÇÏ¿´´Ù. ¼¼Æ÷ÀÇ ¼ºÀå°ú Áõ½Ä ¹× ¼¼Æ÷»ç, ±×¸®°í À̵é°ú °ü·ÃµÈ ¼¼Æ÷³» ½ÅÈ£Àü´Þ¹°Áú ¹ßÇöÀÇ º¯È­¸¦ º¸°íÀÚ ÇÏ¿´°í, ¼¼Æ÷»ç´Â screeningÇÑ ÈÄ ¼¼Æ÷»çÀÇ À¯Çü (necrosis£¯apoptpsis)À» ±Ô¸íÇÏ°íÀÚ ÇÏ¿´´Ù. HCF-1Àº DMEMÀ¸·Î °è´ë¹è¾çÇÑ ÈÄ À¯ÁöÇÏ¿´À¸¸ç, »ç¿ëÇÑ ±Ý¼ÓÀç´Â stainless steet crown (R), ±³Á¤¿ë band(B), ±³Á¤¿ë wire(W)ÀÇ ¼¼ Á¾·ù¿´´Ù. HGF¼¼Æ÷ÀÇ Áõ½Ä¿¡ ´ëÇÏ¿© ±âº»ÀûÀ¸·Î cell count¸¦ ÇÏ¿´°í, »ýÁ¸¼¼Æ÷ count¸¦ À§ÇÏ¿© ´ëÁ¶±º¿¡ ´ëÇÑ ½ÇÇ豺ÀÇ »ó´ëÁõ½Äµµ¸¦ °è»êÇÏ¿´´Ù. ¼¼Æ÷¼ö´Â ¹è¾çÀÏÀÌ Áö³²¿¡ µû¶ó Áõ°¡ÇÏ¿© 7ÀÏ°¿¡ ÃÖ°í¸¦ ³ªÅ¸³»¾ú°í, 11ÀÏ°¿¡´Â °¨¼ÒÇÏ¿´À¸¸ç, ´ëÁ¶±º°ú ½ÇÇ豺»çÀÌÀÇ Åë°èÀû À¯ÀÇÇÑ Â÷ÀÌ´Â °üÂûµÇÁö ¾Ê¾Ò´Ù(p>0.05). ´ëÁ¶±º¿¡ ´ëÇÑ ½ÇÇ豺ÀÇ »ó´ëÁõ½Äµµ ¶ÇÇÑ À¯ÀÇÇÑ Â÷ÀÌ´Â ¾ø¾ú´Ù(p>0.05). ¼¼Æ÷»ç¿¡ ´ëÇÑ ÇüÅÂÀû ¼Ò°ßÀº ±«»ç(necrosis)¸¦ ³ªÅ¸³»¾ú´Ù. PCNA lableing index¿¡ ´ëÇÑ ´ëÁ¶±º°ú ½ÇÇ豺 °£¿¡ À¯ÀÇÇÑ Â÷ÀÌ´Â ¾ø¾ú´Ù(p>O-05). ½ÅÈ£Àü´Þ °ü·Ã MAP kinaseÀÎ ERK1 ¹× ERK2, p38, JNK´Â ¹è¾çÀÏÀÇ °æ°ú¿¡ µû¸¥ ¹ßÇöÀÇ º¯È­´Â °üÂûµÇ¾úÀ¸³ª, ´ëÁ¶±º°ú °¢ ½ÇÇ豺 °£¿¡ Â÷ÀÌ´Â °üÂûµÇÁö ¾Ê¾Ò´Ù.
°á·ÐÀûÀ¸·Î º» ¿¬±¸´ë»óÀÎ stainless steet crown, ±³Á¤¿ë band ¿Í wire, ¼¼ Á¾·ùÀÇ ¼Ò¾Æ Ä¡°ú¿ë ±Ý¼ÓÀç´Â ´Ü±â°£ÀÇ ÀÎü¼¶À¯¸ð¼¼Æ÷¸¦ ÀÌ¿ëÇÑ ¼¼Æ÷ģȭ¼º °ËÁ¤¿¡ À־ ¼¼Æ÷Àû, ºÐÀÚÀû À§ÇØ ¾ç»óÀ» ³ªÅ¸³»Áö ¾Ê¾Ò´Ù.

For the purpose of evaluating the biocompatability of 3 kinds of metallic materials frequently used in pediatric dentistry (stainless steel crown, orthodontic band, orthodontic wire), cellular and molecular studies, including cell growth and proliferation, screening of cell death with determination of types whether necrosis or apoptosis and changes in expressions of related signaling molecules were examined, using cultured human gingival fibroblasts (HGF-1). HGF-1 was cultured in Dulbecco¢¥ s modified Eagle¢¥ s medium. among which the 3rd to 6th generations of HGF-1 were used. The specimen were divided into stainless steel crown (R), band (B) and wire (W). The immunocytochemical study was done for the detection of anti-PCNA (proliferating cell nuclear antigen) labeling. With extracted protein, western blot was done for the detection of ERK1J2, JNK, and p38, using individual antibodies. Cultured cells proliferated, remarkably till 7 day and slightly at 11 day. There was no statistical significance in the counts of proliferating HGF-1 between control and experimental groups (p)0.05). Relative growth rates were no statistically significant difference between control and experimental groups (p)0-05)- PC-NA labeling indexes showing similar patterns in control and experimental groups. The expressions of ERKI and ERK2, p38 were similar in control and experimental groups. The expression of JNK increased at 1st day, slightly decreased at 4th day and markedly increased at 7th and 11 day. Although the patterns of control and experimental groups were similar, the increased expressions of JNK at late period suggest a possible stress due to inhibited cell growth and proliferation, and worse culture condition. Conclusively, the 3 kinds of metal specimens used in this study did not induce cellular and molecular hazards during short term culture of HGF-l. But, for the better clinical stability. the establishment of long period culture and animal experiment was thought necessary.

Å°¿öµå

HGF-1;Ä¡°ú±Ý¼ÓÀç;¼¼Æ÷µ¶¼º;PCNA;MAP kinase;HGF-1;Metallic dental material;Cytotoxicity;PCNA;MAP kinase

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