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Ä¡±Ù ¹× Ä¡ÁÖÁ¶Á÷ Çü¼º°úÁ¤ µ¿¾È Sonic Hedgehog signalingÀÇ ¿ªÇÒ

Roles of Sonic Hedgehog Signaling During Tooth Root and Periodontium Formation

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ȲÀç¿ø, Á¶ÀǽÄ, ¾ç¿¬¹Ì,
¼Ò¼Ó »ó¼¼Á¤º¸
ȲÀç¿ø ( Hwang Jae-Won ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ ±¸°­ÇغÎÁ¶Á÷Çб³½Ç
Á¶ÀǽĠ( Cho Eui-Sic ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ ±¸°­ÇغÎÁ¶Á÷Çб³½Ç
¾ç¿¬¹Ì ( Yang Yeon-Mi ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

º» ¿¬±¸´Â Ä¡±Ù ¹× Ä¡ÁÖÁ¶Á÷ÀÇ Çü¼º°úÁ¤µ¿¾È Sonic Hedgehog (SHH) signalingÀÇ ¿ªÇÒ¿¡ ´ëÇØ ¾Ë¾Æº¸°íÀÚ Ä¡¼º°£¿±¿¡¼­ Á¶Á÷ƯÀÌÀûÀ¸·Î Smoothened (Smo)°¡ È°¼ºÈ­ ¶Ç´Â Â÷´ÜµÇ´Â mouse¸¦ Á¦ÀÛÇÏ¿© ºÐ¼®ÇÏ¿´´Ù. »ýÈÄ 28ÀÏ°æ Smo È°¼ºÈ­¸ðµ¨¿¡¼­´Â H-E ¿°»ö ½Ã ¾ãÀº µÎ²²ÀÇ Ä¡±Ù»ó¾ÆÁú, ³Ð¾îÁø Ä¡¼ö°­, Ä¡ÁÖÀδë°ø°£¿¡ ´À½¼ÇÏ°Ô ¹è¿­µÇ¾îÀÖ´Â ¼¶À¯µéÀÌ °üÂûµÇ¾ú´Ù. ¸é¿ªÁ¶Á÷È­Çп°»ö ½Ã Smo È°¼ºÈ­¸ðµ¨Àº wild type mouse¿Í ºñ±³ÇÏ¿© ¹é¾ÇÁú, Ä¡ÁÖÀÎ´ë ±×¸®°í/¶Ç´Â ¹é¾Ç¸ð¼¼Æ÷ÀÇ Ç¥½ÄÀÚÀÎ Bsp, Dmp1, Periostin, Ank °°Àº ±âÁú ´Ü¹éÁúµéÀÇ ¹ßÇöÀÌ ÇöÀúÈ÷ °¨¼ÒÇÏ¿´´Ù. ±×·¯³ª Smo Â÷´Ü¸ðµ¨Àº wild type mouse¿Í ºñ±³ÇÏ¿© ÀÌ·¯ÇÑ ±âÁú ´Ü¹éÁúµéÀÇ ¹ßÇö¿¡ Â÷ÀÌ°¡ º¸ÀÌÁö ¾Ê¾Ò´Ù.
º» ¿¬±¸¸¦ ÅëÇÏ¿© Ä¡±Ù ¹× Ä¡ÁÖÁ¶Á÷ÀÇ Á¤»óÀûÀÎ Çü¼º°úÁ¤¿¡ ³·Àº ¼öÁØÀ¸·Î Á¶ÀýµÇ´Â SHH signalingÀÌ ÇÊ¿äÇÏ´Ù´Â °ÍÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù.

The aim of this study was to understand the roles of Sonic Hedgehog (SHH) signaling during tooth root and periodontium formation. In this study, we generated the dental mesenchyme-specific Smoothened (Smo) activated/inactivated mice with the activity of Cre recombinase under the control of osteocalcin promoter.
In the Smo activated mutant molar sections at the postnatal 28 days, we found extremely thin root dentin and widened pulp chamber. Picrosirius red staining showed loosely arranged fibers in the periodontal space and decreased cellular cementum with some root resorption. Immunohistochemical staining showed less localization of matrix proteins such as Bsp, Dmp1, Pstn, and Ank in the cementum, periodontal ligament, and/or cementoblast.
In the Smo inactivated mutant mouse, there was not any remarkable differences in the localization of these matrix proteins compared with the wild type. These findings suggest that adequate suppressing regulation of SHH signaling is required in the development of tooth root and periodontium.

Å°¿öµå

Sonic Hedgehog signaling; Smoothened; Periodontium

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