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Á¦°¡ À̹ø¿¡ ¼±Á¤ÇÑ ³í¹®Àº 2022³â 4¿ù iscience¿¡ ÃâÆÇµÈ ‘Extracellular nicotinamide phosphoribosyltransferase boosts IFNγ-induced macrophage polarization independently of TLR4’ ÀÔ´Ï´Ù.
NAMPT´Â ¼¼Æ÷ ³»ºÎ ¶Ç´Â ¿ÜºÎ¿¡ Á¸ÀçÇÔÀ¸·Î½á °¢°¢ ´Ù¸¥ ±â´ÉÀ» ¼öÇàÇÏ´Â ¹°ÁúÀÔ´Ï´Ù. ±× Áß ¼¼Æ÷ ¿ÜºÎ¿¡¼ ÀÛ¿ëÇÏ´Â eNAMPT´Â TLR4 antibodyÀÇ antogonist·Î ÀÛ¿ëÇÒ ¼ö ÀÖ´Ù°í ¾Ë·ÁÁ® ÀÖ½À´Ï´Ù.
ÀÌ·¯ÇÑ eNAMPT°¡ ƯÁ¤ »óȲ¿¡ µû¶ó macrophage¸¦ M1 polarization½ÃÅ°°Å³ª M2 polarization½ÃŲ´Ù´Â ¿¬±¸µéÀÌ ÁøÇàµÇ¾îÁ® ¿ÔÁö¸¸, ±×·¯ÇÑ ÀÛ¿ëÀÇ ¸íÈ®ÇÑ ¸ÞÄ¿´ÏÁòÀº ¹àÇôÁöÁö ¾Ê¾Ò½À´Ï´Ù.
µû¶ó¼ º» ³í¹®¿¡¼´Â eNAMPTÀÇ ÀÛ¿ë ¸ÞÄ¿´ÏÁòÀ» ¹àÇô macrophageÀÇ ¿°Áõ¹ÝÀÀÀ» Á¶ÀýÇÏ´Â »õ·Î¿î therapeutic strategy¸¦ Á¦½ÃÇÏ°íÀÚ ÇÏ¿´½À´Ï´Ù.
¸ÕÀú, ÀϹÝÀûÀÎ »óȲ¿¡¼ eNAMPT°¡ macrophage¸¦ ¾î¶»°Ô polarization½ÃÅ°´ÂÁö ¾Ë¾Æº¸±â À§ÇÏ¿© PEC¿¡ eNAMPT¸¦ ó¸®ÇÑ ÈÄ cellÀÇ gene expressionÀ» °üÂûÇÏ¿´½À´Ï´Ù.
±× °á°ú, eNAMPT´Â M1-skewing stimulusÀÓÀ» º¸¿©ÁÖ¾ú°í ÀÌ´Â ¿©·¯ inflammatory signaling pathwayµéÀ» inducingÇÏ´Â °ÍÀ» º¸¿©ÁÖ¾ú½À´Ï´Ù.
´ÙÀ½À¸·Î, ±×·¯ÇÑ Çö»óÀÌ eNAMPTÀÇ enzymatic activity¿Í´Â °ü·ÃÀÌ ¾øÀ½À» º¸¿©ÁÖ±â À§ÇÏ¿© enzymatic activity ±â´ÉÀ» »ó½ÇÇÑ mutant¸¦ »ç¿ëÇÏ¿© µ¿ÀÏÇÑ È¿°ú¸¦ ³ªÅ¸³¿À» º¸¿©ÁÖ¾ú½À´Ï´Ù.
»Ó¸¸ ¾Æ´Ï¶ó, macrophageÀÇ chemotaxis¸¦ À¯¹ßÇϴµ¥µµ eNAMPT stimulationÀÌ ¿µÇâÀ» ¹ÌÄ¡´Â °ÍÀ» º¸¿©ÁÖ¾ú½À´Ï´Ù.
±×¸®°í, ÀÌ·¯ÇÑ eNAMPTÀÇ M1-skewing stimulationÀÌ IFN-gamma·Î ÀÎÇÑ inflammatory signaling pathway¸¦ °È½ÃÅ°´Â °ÍÀ» º¸¿©ÁÖ¾ú°í, ÀÌ·¯ÇÑ pathway´Â TLR4-independent manner·Î °È½ÃÄ×À½À» º¸¿©ÁÖ¾ú½À´Ï´Ù.
¸¶Áö¸·À¸·Î ¾Õ¼ ¾ð±ÞÇÑ IFN-gamma·Î ÀÎÇÑ inflammatory signaling pathway¸¦ °È½ÃÅ°´Â °ÍÀÌ STAT1/3 mediated effectÀÓÀ» ¹ß°ßÇÏ¿´À¸¸ç, IFN-gamma induced M1-polarization¿¡ ÀÇÇØ eNAMPT°¡ activeÇÏ°Ô secretionµÇ´Â °Í ¶ÇÇÑ º¸¿©ÁÖ¾ú½À´Ï´Ù.
º» ³í¹®À» ¼±Á¤ÇÑ ÀÌÀ¯´Â HD11 TLR knockout ½ÇÇèÀ» ÁغñÇϴµ¥ ÀÖ¾î¼, TLR knockout cell line¿¡¼´Â macrophageÀÇ polarization¿¡ ¾î¶°ÇÑ º¯È°¡ ÀÖÀ»Áö »ý°¢Çغ¸°íÀÚ ÇÏ¿´°í, º» ³í¹®¿¡¼ TLR4 knockout½Ã¿¡µµ TLR signalingÀÇ Áõ°¡¸¦ º¸¿©ÁÜÀ¸·Î½á ´Ù¸¥ TLRÀÇ compensatory response °¡´É¼ºÀ̳ª »õ·Î¿î receptor¸¦ ÅëÇØ TLR signaling¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» »ý°¢ÇÒ ¼ö ÀÖ´Â conceptÀ» Âü°íÇÏ°íÀÚ ¼±Á¤ÇÏ¿´½À´Ï´Ù.
³í¹® ¸µÅ© : https://www.sciencedirect.com/science/article/pii/S2589004222004175?via%3Dihub#bib23