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Streptococcus mutans GS5ÀÇ ¼¼Æ÷¸· ´Ü¹éÁú Ag I/II¿¡ ´ëÇÑ ´ÜÇ×üÀÇ »ý»ê

Generation of a monoclonal antibody against AgI/II, a cellular surface protein of Streptococcus mutans GS5

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ÇÑÁöÇý ( Han Ji-Hye ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç ¹× ±¸°­»ýü°úÇבּ¸¼Ò
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Abstract

Ä¡¾Æ¿ì½ÄÁõÀÇ ¿øÀαÕÀ¸·Î ¾Ë·ÁÁ® ÀÖ´Â Streptococcus mutansÀÇ ¿©·¯ ±ÕÁÖ Áß GS-5±ÕÁÖ´Â AgI/II À¯ÀüÀÚ ³»¿¡ »ý±â´Â nonsense mutation¿¡ ÀÇÇÏ¿© ÀýÆíÀÇ ºÐºñÇü AgI/II ´Ü¹éÁúÀ» ¹ßÇöÇÑ´Ù. ÀÌ·¯ÇÑ »ç½ÇÀº S. nutans GS-5°¡ µ¶Æ¯ÇÑ ÀÓ»ó ±â´ÉÀ» °¡Áú ¼ö ÀÖÀ½À» ¾Ï½ÃÇϸç, ÃÖ±ÙÀÇ º¸°í´Â ÀÓ»óÀûÀ¸·Î ºÐ¸®µÈ S. mutans ±ÕÁÖ¸¦ ÀÌ¿ëÇÑ ½ÇÇè °á°ú¿¡ ±Ù°ÅÇÏ¿© ÀÌ·¯ÇÑ °¡´É¼ºÀ» ÁöÁöÇÑ´Ù. º» ¿¬±¸´Â ÀÌÀüÀÇ ½ÇÇèÀ» ÅëÇÏ¿© S. mutansÀÇ agI/II À¯ÀüÀÚ¸¦ È®º¸ÇÑ ÈÄ ÀçÁ¶ÇÕ ´Ü¹éÁúÀÎ N-terminal AgI/II ´Ü¹éÁúÀ» »ý»êÇÏ¿´´Ù. ÀÌ ÈÄ ÇÏÀ̺긮µµ¸¶¸¦ ÅëÇÏ¿© 1C11A¶ó ¸í¸íµÇ´Â ¼¼Æ÷¸· ´Ü¹éÁú AgI/II¿¡ ´ëÇÑ ´ÜÇ×ü¸¦ »ý»êÇÏ¿´À¸¸ç, Western blot°ú ELISA¸¦ ÅëÇÏ¿© ÀÌ Ç×ü°¡ AgI/II ´Ü¹éÁú¿¡ ¸Å¿ì ³ôÀº ƯÀ̼ºÀ» ³ªÅ¸³¿À» ¾Ë ¼ö ÀÖ¾ú´Ù. »õ·ÎÀÌ ¾ò¾îÁø ´ÜÇ×ü´Â AgI/II¿Í °ü·ÃµÈ ÁúȯÀÇ ±âÀüÀ» ±Ô¸íÇϴµ¥ ±âÃÊ Àç·á°¡ µÉ °ÍÀÌ´Ù.

Most of oral streptococci express the Antigen I/II (AgI/II) proteins, cell wall anchored adhesions. AgI/II protein binds to salivary agglutinin glycoprotein, a component of tooth pellicle and to ligands in other bacteria. These associations play important roles in bacterial colonization. Recently, it was reported that diverse host molecules also interact with AgI/II protein and that these interactions induce inflammatory responses from host cells. Among mutans streptococci containing -type hemolytic activity, Streptococcus mutans is a causative agent for dental caries. Compared with many other strains of S. mutans, GS-5 strain is unique in that this bacterium expresses truncated secretory AgI/II protein due to the nonsense mutation in the agI/II gene. This indicates that S. mutans GS-5 has a different clinical role and a recent report supported this idea based on the results from clinically isolated S. mutans strains. Previously, we had cloned agI/II gene from S. mutans GS-5 and generated recombinant N-terminal AgI/II protein. In this study, we further produced a hybridoma line expressing anti-AgI/II monoclonal antibodies named as 1C11A. This antibody showed high sensitivity to AgI/II protein in Western blot and ELISA. This new reagent will provide a basis for investigating the mechanisms of AgI/II-related diseases.

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Streptococcus mutans;Antigen I/II;Monoclonal antibody

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