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The Effect of Treponema denticola immunoinhibitory protein on cytokine expression in T cells

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Abstract

°¨¿°±Ù°ü³» spirochetesÀÇ Á¸Àç À¯¹«¿¡ ´ëÇÑ ³í¶õÀÌ ¸¹¾ÒÀ¸³ª ÃÖ±Ù PCRÀ» »ç¿ëÇÑ ¼¼±Õ°ËÃâ ½ÇÇè¿¡¼­ Treponema denticola ±ÕÁÖ°¡ °¨¿°±Ù°üÀÇ 50%ÀÌ»óÀÇ °æ¿ì¿¡¼­ ¹ß°ßµÊ¿¡ µû¶ó ÀÌ ¼¼±ÕÀÌ Ä¡¼ö ¹× Ä¡±Ù´Ü ÁúȯÀÇ º´ÀΰúÁ¤¿¡ °ü¿©ÇÏ´Â Áö¿¡ ´ëÇÑ °ü½ÉÀÌ ³ô¾ÆÁö°í ÀÖ´Ù. ÀÌ¿Í °ü·ÃÇÏ¿© Shenker µîÀÌ T. denticolaÀÇ sonicated extract¿¡¼­ ¼ø¼öºÐ¸®µÈ ¸é¿ª¾ïÁ¦ ´Ü¹éÁú (immunoinhibitory protein)ÀÌ T ÀÓÆı¸ÀÇ proliferationÀ» ¹æÇØÇÔÀ» º¸°íÇÑ ¹Ù ÀÖ´Ù. ÇÏÁö¸¸ ÀÌ ¼¼±Õ¼º ´Ü¹éÁúÀÌ T ÀÓÆı¸ÀÇ ±â´É¿¡ ¾î¶² ¿µÇâÀ» ¹ÌÄ¡´Â Áö¿¡ ´ëÇÑ ¿¬±¸´Â ºÎÁ·ÇÑ ½ÇÁ¤ÀÌ´Ù. µû¶ó¼­ T. denticolaÀÇ ¸é¿ª¾ïÁ¦ ´Ü¹éÁúÀÌ Ã³¸®µÇ±â Àü°ú ÈÄÀÇ T ¼¼Æ÷¿¡¼­ ºÐºñµÇ´Â cytokine Interleukine-2¿Í Interleukine-4ÀÇ ¹ßÇö Á¤µµ¸¦ ºñ±³ÇÏ¿© ±× ÀÛ¿ë±âÀüÀ» ¹àÈ÷´Â °ÍÀÌ º» ¿¬±¸ÀÇ ¸ñÀûÀÌ´Ù. Treponema denticola LL2513¸¦ Çø±â¼º »óÅ¿¡¼­ TYGVS ¹èÁö¿¡ ¹è¾çÇÑ ´ÙÀ½ PBS ¼¼Ã´°ú lyophilize °úÁ¤À» °ÅÄ£ ÈÄ sonicationÀ» ½ÃÇàÇÑ´Ù. ÀÌ °úÁ¤À» °ÅÃÄ ÃßÃâµÈ »óÃþ¾×ÀÌ T. denticolaÀÇ ¸é¿ª¾ïÁ¦ ´Ü¹éÁúÀÎ sonicated extractÀÌ´Ù. ½ÇÇèÀ» À§ÇØ °Ç°­ÇÑ Ç÷¾× °ø¿©ÀڷκÎÅÍ T ¼¼Æ÷¸¦ Buoyant density ¹æ¹ýÀ¸·Î ÃßÃâÇØ ³½ ´ÙÀ½ 24-well plate¿¡ 100¸¸°³ÀÇ ¼¼Æ÷¸¦ ÁÖÀÔÇÑ ´ÙÀ½ Group 1¿¡´Â 2% FBSÀÇ medium¸¸À¸·Î ¹è¾çÇÏ°í, Group 2¿¡´Â 100 ¥ìlÀÇ PHA·Î¸¸ Áõ½Ä ÀÚ±ØÀ» ÇÏ¿´°í, Group 3¿¡´Â PHAó¸® Àü sonicated extract·Î T¼¼Æ÷¸¦ ÀÚ±ØÇÏ¿´´Ù. 72½Ã°£ µ¿¾È ¹è¾çÇÑ ´ÙÀ½ »óÃþ¾×À» ÃßÃâÇÏ¿© ELISA assay¸¦ »ç¿ëÇÏ¿© IL-2¿Í IL-4ÀÇ ¹ßÇöÁ¤µµ¸¦ ÃøÁ¤ÇÏ¿´´Ù. PHA·Î ÀڱعÞÀº Group 2¿¡¼­´Â IL-2¿Í IL-4°¡ ´ëÁ¶±ºÀÎ Group 1¿¡¼­º¸´Ù ³ôÀº ¼öÁØÀ¸·Î ¹ßÇöµÇ¾ú´Ù. ÇÏÁö¸¸ 12.5 §¶/mlÀÇ T. denticola sonicated ÃßÃâ¹°·Î Àüó¸®ÇÑ Group 3¿¡¼­´Â IL-2¿Í IL-4ÀÇ ¼öÁØÀÌ À¯ÀǼºÀÖ°Ô ¾ïÁ¦µÇ¾î ¹ßÇöµÇ¾ú´Ù (p < 0.05). ÀÌ·¯ÇÑ °á°ú¸¦ ÅëÇÏ¿© T. denticola¿¡¼­ ÃßÃâµÈ ¸é¿ª¾ïÁ¦ ´Ü¹éÁúÀÌ Th1°ú Th2ÀÇ cytokine ºÐºñ ±â´ÉÀ» ¾ïÁ¦ÇÏ´Â °ÍÀ¸·Î È®ÀÎ µÇ¾úÀ¸¸ç ÀÌ ±âÀüÀÌ °¨¿° ±Ù°ü¿¡¼­ ¹ß°ßµÇ´Â T. denticolaÀÇ Ä¡¼ö ¹× Ä¡±Ù´Ü Áúȯ¿¡ ´ëÇÑ º´ÀαâÀü°ú °ü·ÃÀÌ ÀÖ´Â °ÍÀ¸·Î »ç·áµÈ´Ù.

Immunoinhibitory protein extracted from sonicated Treponema denticola have been shown to suppress cell cycle progression of human lymphocytes. To study in detail about the effect of this microorganism on the function of lymphocytes. we investigated the levels of Interleukin-2 (IL-2) and Interleukin-4 (IL-4) production by T lymphocytes before and after the addition of 12.5 §¶/ml T. denticola sonicated extracts. In this study. levels of IL-2 and IL-4 produced from T cells pretreated with sonicated extracts were evaluated by using the quantitative sandwich enzyme immunoassay technique. In response to phytohemagglutinin (PHA) stimulation. T cell produced increased levels of IL-2 and IL-4. However. the expressions of both cytokines were significantly inhibited when PHA activated-T cells were pre-exposed to sonicated T. denticola extracts (p < 0.05). These findings suggest that the T. denticola sonicated extracts induced-immunosuppression in Th1 and Th2 cell functions could be a part of the pathogenic mechanism of the endodontic failure associated with this microorganism.

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Sonicated ÃßÃâ¹°;¸é¿ª¾ïÁ¦ ´Ü¹éÁú;IL-2;IL-4;Treponema denticola;Immunoinhibitory protein;T. denticola;Sonicated extracts;Interleukin-2

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