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The effect of progressive tensional force on mRNA expression of osteoprotegerin and receptor activator of nuclear factor ¥êB ligand in the human periodontal ligament cell

Korean Journal of Orthodontics 2005³â 35±Ç 4È£ p.262 ~ 274
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Abstract

º» ¿¬±¸´Â Ä¡ÁÖÀÎ´ë ¼¼Æ÷¿¡ Áö¼ÓÀûÀÌ°í Á¡ÁøÀû ÀÎÀå·ÂÀ» °¡ÇÏ¿© Ä¡¾Æ À̵¿ ½Ã Çü¼ºµÇ´Â ÀÎÀåºÎÀ§ÀÇ ±â°èÀû Àڱؿ¡ ´ëÇÑ »ýÈ­ÇÐÀû Àü´Þ°ú Ä¡Á¶°ñ Èí¼ö¿Í »ý¼º Á¶Àý ±âÀüÀ» ÀÌÇØÇÏ°íÀÚ ÇÏ¿´´Ù. Ä¡ÁÖÀÎ´ë ¼¼Æ÷°¡ ¹è¾çµÈ À¯¿¬ÇÑ ¼ºÀå Ç¥¸éÀ» °¡Áø ¹èÁö¿¡ Áö¼ÓÀûÀÌ°í Á¡ÁøÀûÀÎ ÀÎÀå·ÂÀ» °¡ÇÏ°í °ñÈí¼ö ÀÎÀÚÀÎ PGE_(2)¿Í °ñÇü¼º ÀÎÀÚÀÎ ALPÀÇ »ý¼º·®À» 1, 3, 6, 12½Ã°£ ÈÄ¿¡ ÃøÁ¤ÇÏ¿© Á¤·®ºñ±³ÇÏ¿´°í ÆÄ°ñ¼¼Æ÷ ºÐÈ­±âÀüÀ» Á¶ÀýÇÏ´Â OPG, RANKLÀÇ ÀÎÀÚµé°ú matrix metalloproteinase (MMP)-1, -8, -9, -13, tissue inhlbitor of matrix metalloproteinase (TIMP)-1ÀÇ ÀÎÀÚµéÀ» ¿ªÀü»ç ÁßÇÕÈ¿¼Ò ¿¬¼â¹ÝÀÀ °Ë»çÇÏ¿© m-RNA ¹ßÇöÀ» ºñ±³ÇÑ °á°ú, Ä¡ÁÖÀÎ´ë ¼¼Æ÷¿¡ ÀÎÀå·ÂÀ» °¡ÇÑ °æ¿ì ´ëÁ¶±ºº¸´Ù PGE_(2)ÀÇ ³óµµ°¡ Àû¾ú°í (p<0.05) ALPÀÇ ³óµµ º¯È­´Â ¾ø¾úÀ¸¸ç OPGÀÇ mRNA ¹ßÇöÀÌ Áõ°¡ÇÏ¿´À¸³ª, RANKLÀÇ mRNA ¹ßÇöÀº °¨¼ÒÇÏ¿´´Ù. ±×¸®°í TIMP-1°ú MMP-1, -8, -9, -13ÀÇ mRNA ¹ßÇöÀÌ ´ëÁ¶±º°ú Â÷ÀÌ°¡ ¾ø¾ú´Ù. ÀÌ»óÀÇ ¿¬±¸¿¡¼­ »ç¶÷ÀÇ Ä¡ÁÖÀÎ´ë ¼¼Æ÷´Â Á¡ÁøÀûÀÌ°í Áö¼ÓÀûÀÎ ÀÎÀå·Â¿¡ ´ëÇÑ ¹ÝÀÀÀ¸·Î PGE_(2)ÀÇ »ý¼º°ú RANKLÀÇ mRNA ¹ßÇöÀº °¨¼ÒÇÏ°í OPGÀÇ mRNA ¹ßÇöÀº Áõ°¡ÇÏ¿© °ñÈí¼ö¸¦ ¾ïÁ¦ÇÏ´Â È¿°ú¸¦ º¸ÀÌ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù.

Tooth movement is a result of mutual physiologic responses between the periodontal ligament and alveolar bone stimulated by mechanical strain. The PDL cell and osteoblast are known to have an influence on bone formation by controlling collagen synthesis and alkaline phosphatase activation. Moreover, recent studies have shown that the PDL cell and osteoblast release osteoprotegerin(OPG) and the receptor activator of nuclear factor ¥êB ligand (RANKL) to control the level of osteoclast differentiation and activation which in turn influences bone resorption. In this study, progressively increased, continuous tenslonal force was applied to PDL cells. The objective was to progressively increased. continuous tensional force was applied to PDL cells. The objective was to find out which kind of biochemical reactions occur after tensional force application and to illuminate the alveolar bone resorption and apposition mechanism. Continuous and progressively increased tensile force was applied to PDL cells cultured on a petriperm dish wlth a flexible membrane. The amount of PGE_(2) and ALP synthesis were measured after 1, 3, 6 and 12 hours of force application. Secondly, RT-PCR analysis was carried out for OPG and RANKL whlch control osteoclast differentiation and MMP-1, -8, -9, -13 and TIMP-1 which regulate the resolution of collagen and resorption of the osteoid layer. According to the results, we concluded that progressively increased, continuous force application to human PDL cells reduces PGE_(2) synthesls, and increases OPG mRNA expression.

Å°¿öµå

ÀÎÀå·Â;Ä¡ÁÖÀÎ´ë ¼¼Æ÷;Osteoprotegerin;Receptor activator of nuclear faoto ¥êB ligand;Mechanlcal strain;Periodontal ligament cell;Osteoprotegerin;Receptor activator of nuclear factor ¥êB ligand

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