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Streptococcus mutans ¹ÙÀÌ¿ÀÇʸ§¿¡ ´ëÇÑ ¿¡¸®½º·Î½Å ¸Å°³ ±¤¿ªµ¿ Ä¡·á ½Ã potassium iodideÀÇ È¿°ú

Effect of Potassium Iodide on Erythrosine-Mediated Photodynamic Therapy on Streptococcus Mutans Biofilms

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±è¿ë¼ø ( Kim Yong-Soon ) - Gangneung-Wonju National University College of Dentistry Department of Pediatric Dentistry
¹ÚÈ£¿ø ( Park Ho-Won ) - Gangneung-Wonju National University College of Dentistry Department of Pediatric Dentistry
ÀÌÁÖÇö ( Lee Joo-Hyun ) - Gangneung-Wonju National University College of Dentistry Department of Pediatric Dentistry
±èÇØ´Ï ( Kim Hae-Ni ) - Gangneung-Wonju National University College of Dentistry Department of Pediatric Dentistry
À̽ÿµ ( Lee Si-Young ) - Gangneung-Wonju National University College of Dentistry Department of Microbiology and Immunology

Abstract

ÀÌ ¿¬±¸´Â Streptococcus mutans ¹ÙÀÌ¿ÀÇʸ§¿¡ ´ëÇÑ ¿¡¸®½º·Î½Å ¸Å°³ ±¤¿ªµ¿ Ä¡·á¿¡¼­ potassium iodide (KI)ÀÇ È¿°ú¸¦ Æò°¡ÇÏ´Â In vitro ½ÇÇèÀÌ´Ù. S. mutans ATCC 25175¸¦ ¹è¾çÇÏ¿© hydroxyapatite disk¿¡ ¹ÙÀÌ¿ÀÇʸ§À» Çü¼ºÇÏ¿´´Ù. ±¤°¨°¢Á¦ÀÎ ¿¡¸®½º·Î½ÅÀ» 20 ¥ìM, KI¸¦ °¢°¢ 10, 50, 100 mM·Î Èñ¼®ÇÏ¿© Àû¿ëÇÑ µÚ ±¤¿ªµ¿ Ä¡·á¸¦ ½ÃÇàÇÏ¿´´Ù. »ýÁ¸ÇÑ ¼¼±ÕÀÇ ¼ö´Â colony forming units (CFU)/mL·Î »êÁ¤ÇÏ¿´À¸¸ç Bonferroni »çÈÄ ºÐ¼®À» ÅëÇØ ±×·ì °£ Â÷ÀÌÀÇ À¯ÀǼºÀ» È®ÀÎÇÏ¿´´Ù. Confocal laser scanning microscopy (CLSM)À» ÀÌ¿ëÇÏ¿© ¼¼Æ÷ »ýÁ¸À²À» ½Ã°¢ÀûÀ¸·Î Æò°¡ÇÏ¿´´Ù. ½ÇÇè °á°ú KI¸¦ Àû¿ëÇÑ ÈÄ ±¤¿ªµ¿ Ä¡·á¸¦ ½ÃÇàÇÑ ½ÇÇ豺¿¡¼­ KIÀÇ ³óµµÀÇ °ü°è ¾øÀÌ ÇöÀúÇÑ CFUÀÇ °¨¼Ò°¡ °üÂûµÇ¾ú´Ù(p < 0.05). ¶ÇÇÑ 10 mM KI¿¡ ºñÇØ 100 mM KI¸¦ Àû¿ëÇÑ ½ÇÇ豺¿¡¼­ À¯ÀÇÇÑ CFUÀÇ °¨¼Ò°¡ °üÂûµÇ¾ú´Ù(p < 0.05). CLSM °üÂû ½Ã¿¡µµ µ¿ÀÏÇÑ °á°ú¸¦ È®ÀÎÇÏ¿´´Ù. KI´Â ¸ðµç ³óµµ¿¡¼­ S. mutans ¹ÙÀÌ¿ÀÇʸ§¿¡ ´ëÇÑ ¿¡¸®½º·Î½Å ¸Å°³ ±¤¿ªµ¿ Ä¡·áÀÇ È¿°ú¸¦ À¯ÀÇÇÏ°Ô Çâ»ó½ÃÄ×´Ù. ÀÌ´Â ¹ÙÀÌ¿ÀÇʸ§ »óÅÂÀÇ ±ÕÁÖ¿¡ ´ëÇÑ ±¤¿ªµ¿ Ä¡·áÀÇ ³·Àº °¨¼ö¼ºÀ» º¸¿ÏÇÒ ¼ö ÀÖÁö¸¸, Ãß°¡ÀûÀÎ ¿¬±¸¸¦ ÅëÇÑ ÃÖÀûÀÇ ÀÓ»ó ÇÁ·ÎÅäÄÝ È®¸³ÀÌ ÇÊ¿äÇÏ´Ù.

The aim of this in-vitro study is to evaluate the effect of potassium iodide (KI) on erythrosine-mediated photodynamic therapy (PDT) against Streptococcus mutans biofilms. S. mutans ATCC 25175 was cultured to form a biofilm on a hydroxyapatite disk. After diluting erythrosine to 20 ¥ìM and KI to 10, 50, and 100 mM, respectively, PDT was performed. The number of surviving bacteria was calculated as colony forming units (CFU)/mL and the statistical significance of the difference between groups was confirmed by Bonferroni post-hoc analysis. Cell viability was visually evaluated using confocal laser scanning microscopy (CLSM). As a result of the experiment, a significant decrease (p < 0.05) in CFU was observed in the experimental groups in which PDT was performed after applying KI regardless of the concentration of KI. In addition, a significant reduction (p < 0.05) in CFU was observed in the experimental group to which 100 mM KI was applied compared to 10 mM KI. The same results were confirmed when observing CLSM. KI significantly improved the efficacy of erythrosine-mediated PDT on S. mutans biofilms at all concentrations. This may compensate for the low sensitivity of PDT to biofilm-state bacteria strains, but it is necessary to establish an optimal clinical protocol through further research.

Å°¿öµå

Photodynamic therapy; Streptococcus mutans; Potassium iodide; Erythrosine; Biofilm

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