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Á¦°¡ ¹ßÇ¥ÇÒ ³í¹®Àº 2022³â 3¿ù Science immunology¿¡ ÃâÆÇµÈ “
Lung dendritic cell migrate to the spleen to prime long-lived TCF1hi memory CD8 T cell precursors after influenza infection” ÀÔ´Ï´Ù.
È£Èí±â¿¡¼ ¹ß»ýÇÏ´Â ¹ÙÀÌ·¯½º °¨¿°¿¡ ´ëÇ×Çϱâ À§ÇÑ CD8 T cell response´Â ÁÖ·Î lung-draining lymph node (mediastinal LN, med-LN)¿¡¼ Çü¼ºµÇ¸ç, ÀÌ °úÁ¤Àº lung migratory dendritic cellÀÌ viral antigenÀ» naïve T cell¿¡°Ô Á¦½ÃÇÏ´Â °ÍÀ¸·Î ½ÃÀÛµÈ´Ù°í ¾Ë·ÁÁ® ÀÖ½À´Ï´Ù.
±×·¯³ª influenza¿Í °°Àº È£Èí±â ¹ÙÀÌ·¯½º¿¡ ´ëÇÑ CD8 T cell responseÀÇ °æ¿ì lymph node°¡ ¾ø´Â »óȲ¿¡¼µµ ¹ß»ýÇÑ´Ù´Â Á¡¿¡¼, º» ¿¬±¸ÁøÀº ÀÌ·¯ÇÑ CD8 T cell response°¡ ½ÃÀ۵Ǵ major source°¡ spleenÀÏ °ÍÀ̶ó°í Ãß·ÐÇÏ¿´½À´Ï´Ù.
ÀÌ¿¡ º» ¿¬±¸ÆÀ¿¡¼´Â influenza infection model ³» antigen-specific CD8 T cell response°¡ med-LN »Ó¸¸ ¾Æ´Ñ spleen¿¡¼µµ ¹ß»ýÇÑ´Ù´Â °ÍÀ» È®ÀÎÇÏ¿´À¸¸ç, ÀÌ´Â lung migratory DC°¡ viral antigenÀ» captureÇÏ¿© med-LNÀ¸·Î À̵¿ ÈÄ, Sphingosine-1-phosphate receptor mechanismÀ» ±â¹ÝÀ¸·Î lymph node¿¡¼ ºüÁ®³ª¿Í spleenÀ¸·Î À̵¿ÇÔÀ» ¹àÇû½À´Ï´Ù.
¶ÇÇÑ ÀÌ·¸°Ô spleenÀ¸·Î egressionµÈ lung migratory DC´Â antigen-specific CD8 T cellÀ» primingÇÒ ¼ö ÀÖÀ½µµ ¹àÇû½À´Ï´Ù.
Ãß°¡ÀûÀ¸·Î Spleen¿¡¼ primingµÈ CD8 T cell (SP-P)°ú med-LN¿¡¼ primingµÈ CD8 T cell °£ÀÇ RNA-seq data¸¦ ÅëÇØ, ÀÌ µÎ °¡Áö ±×·ìÀÇ CD8 T cell °£¿¡ TCF1 ¹ßÇö¾çÀÌ Â÷ÀÌ°¡ ÀÖÀ½À» È®ÀÎÇÏ¿´À¸¸ç, SP-P CD8 T cell¿¡¼ ³ôÀº ¹ßÇö·®À» º¸ÀÌ´Â °ÍÀ» È®ÀÎÇÏ¿´½À´Ï´Ù.
TCF1Àº long-lived memory CD8 T cellÀÇ Çü¼º¿¡ °ü¿©ÇÏ´Â critical factorÀÓÀÌ Àß ¾Ë·ÁÁ® Àֱ⠶§¹®¿¡, ÇØ´ç ºÐÀÚ ¹ßÇö¿¡ Â÷À̸¦ º¸ÀÌ´Â LN-P CD8 T cell°ú SP-P CD8 T cellÀÇ ±â´ÉÀû ºÐ¼®À» ½Ç½ÃÇÏ¿´°í, ±× °á°ú·Î TCF1À» ³ô°Ô ¹ßÇöÇÏ°í ÀÖ´Â SP-P CD8 T cell ±ºÁýÀÌ long-lived memory Çü¼º¿¡ ÀÌÁ¡À» °¡Áö°í ÀÖÀ½°ú, virus rechallenge assayÀ» ÅëÇØ ÇØ´ç ±ºÁýÀÇ proliferation capacity ¶ÇÇÑ °ÈµÇ¾î ÀÖ´Â °ÍÀ» È®ÀÎÇÏ¿´½À´Ï´Ù.
Áï, ÇØ´ç ³í¹®Àº influenza infection »óȲ¿¡¼ med-LN°ú µ¿½Ã¿¡ spleen¿¡¼µµ virus-specific CD8 T cell primingÀÌ migratory DC¸¦ ÅëÇØ ¸Å°³µÇ¸ç, ƯÈ÷ spleen¿¡¼ primingµÈ CD8 T cellÀº TCF1À» ³ô°Ô ¹ßÇöÇÏ¿© ÀÌÈÄ Çü¼ºµÇ´Â memory & functionality¿¡¼ ÀÌÁ¡À» °¡Áö´Â °ÍÀ» È®ÀÎÇÑ ³í¹®ÀÔ´Ï´Ù.
ÀÌ ³í¹®Àº splenic migratory DC populationÀÇ Æ¯Â¡°ú ±× ±â´É¿¡ ´ëÇؼ °øºÎÇϱâ À§Çؼ ¼±Á¤ÇÏ¿´½À´Ï´Ù.
³í¹® ¸µÅ©:
https://www.science.org/doi/10.1126/sciimmunol.abg6895