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EXPRESSION OF P2X_3 AND ITS COLOCALIZATION WITH TRPV1 IN THE HUMAN DENTAL PULP

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±è¿µ°æ ( Kim Young-Kyung ) - °æºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
±è¼º±³ ( Kim Sung-Kyo ) - °æºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç

Abstract

[ P2X_3 ] ¼ö¿ë±â´Â ¼¼Æ÷ ¿Ü¿¡ Á¸ÀçÇÏ´Â ATP¿¡ ÀÇÇÏ¿© È°¼ºÈ­µÇ´Â ligand-gated cation channel·Î¼­ ¿°Áõ ȤÀº Á¶Á÷ ¼Õ»ó ½Ã ¼¼Æ÷¿¡¼­ À¯¸®µÈ ATP°¡ P2X_3 ¼ö¿ë±â¿Í °áÇÕÇÏ¿© µ¿ÅëÀ» À¯¹ßÇÏ´Â °ÍÀ¸·Î ¾Ë·ÁÁ® ÀÖ´Ù. ÀÌ¿¡ º» ¿¬±¸´Â Çü±¤¸é¿ªÁ¶Á÷È­Çбâ¹ýÀ» ÅëÇÏ¿© »ç¶÷ÀÇ Ä¡¼ö¿¡¼­ P2X_3ÀÇ ¹ßÇö°ú ¹Ù´Ò·ÎÀÌµå ¼ö¿ë±âÀÎ TRPV1°úÀÇ °øÁ¸ ¾ç»óÀ» È®ÀÎÇÔÀ¸·Î½á À̵éÀÇ Ä¡¼öµ¿ÅëÀü´Þ ±âÀüÀ» ¹àÈ÷°íÀÚ ½ÃÇàµÇ¾ú´Ù.
»ç¶÷ÀÇ Ä¡¼ö¿¡¼­´Â Ä¡°üºÎ ¹× Ä¡±ÙºÎ Àüü¿¡ °ÉÃÄ ´Ù¼öÀÇ P2X_3 ¸é¿ª¾ç¼º ½Å°æ¼¶À¯°¡ °üÂûµÇ¾úÀ¸¸ç ÀÌ Áß ¾à 79.4%¿¡¼­ TRPV1°úÀÇ °øÁ¸À» º¸¿´´Ù. ÀÌ»óÀÇ °á°ú·Î »ç¶÷ÀÇ Ä¡¼ö¿¡¼­ P2X_3´Â TRPV1°ú ´õºÒ¾î Ä¡¼ö¿°Áõ ½Ã ÁßÃß·ÎÀÇ µ¿ÅëÀü´Þ°ú À¯ÇØÀÚ±ØÀÇ ÁõÆø¿¡ À־ Áß¿äÇÑ ¿ªÇÒÀ» ÇÒ °ÍÀ¸·Î »ç·áµÈ´Ù.

The purinoreceptor, P2X_3 is a ligand-gated cation channel activated by extracellular ATP. It has been reported that ATP can be released during inflammation and tissue damage, which in turn may activate P2X_3 receptors to initiate nociceptive signals. However, little is known about the contribution of P2X_3 to the dental pain during pulpal inflammation. Therefore, the purpose of this study was to investigate the expression of P2X_3 and its colocalization with TRPV1 to understand the mechanism of pain transmission through P2X_3 in the human dental pulp with double labeling immunofluorescence method.
In the human dental pulp, intense P2X_3 immunoreactiyity was observed throughout the coronal and radicular pulp. Of all P2X_3-positive fibers examined, 79.4% coexpressed TRPV1.
This result suggests that P2X_3 along with TRPV1 may be involved in the transmission of pain and potentiation of noxious stimuli during pulpal inflammation.

Å°¿öµå

P2X_3 ¼ö¿ë±â;Çü±¤¸é¿ªÁ¶Á÷È­Çбâ¹ý;»ç¶÷ÀÇ Ä¡¼ö;µ¿ÅëÀÇ Àü´Þ
P2X_3 receptor;Immunofluorescence method;Human dental pulp;TRPV1;Transmission of pain

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