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¿µÁøÄÚÆÛ·¹ÀÌ¼Ç Á¾ÇÕÄ«´Ù·Î±× |
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Introduction
CAR-T ¸é¿ªÄ¡·áÁ¦´Â ¿©·¯ ¾Ç¼º ¾Ï Ä¡·á¿¡ ´ëÇØ ±àÁ¤ÀûÀÎ È¿°ú°¡ ³ªÅ¸³ª°í ÀÖ´Ù.
2017³â ÀÌÈÄ·Î ´ÙÀ½ 3Á¾·ùÀÇCAR-T ¼¼Æ÷ Ä¡·áÁ¦°¡ ½ÂÀεǾúÀ¸¸ç ÇöÀç 100°³ ÀÌ»óÀÇ ±â¾÷µéÀÌ
CAR-T Ä¡·áÁ¦¸¦ °³¹ßÇÏ°í ÀÖ´Â °ÍÀ¸·Î ¾Ë·ÁÁ® ÀÖ´Ù.
1. Kymriah¢â for B-cell precursor acute lymphoblastic leukemia in 2017 and for relapsed
or refractory large B-cell lymphoma in 2018
2. Yescarta¢â for relapsed or refractory large B-cell lymphoma in 2017
3. Tecartus¢â for relapsed or refractory mantle cell lymphoma in 2020
¿©±â¼´Â Sartorius »çÀÇ T-Cell Expansion Solution Àº aurologous CAR-T expansion °³¹ß°ú Á¦Á¶¿¡ ¸Å¿ì È¿°úÀûÀ̶ó´Â °ÍÀ»
È®ÀÎÇÏ°íÀÚ ÇÑ´Ù.
Sartorius »çÀÇ T-Cell Expansion Solution Àº ´ÙÀ½°ú °°ÀÌ ÀÌ·ç¾î Á® ÀÖÀ¸¸ç ¸Å¿ì °æÁ¦ÀûÀ̸ç È¿°ú°¡ Ź¿ùÇÏ°í
Ç×»ó ÀÏÁ¤ÇÑ T-cell expansion À» °¡´ÉÇÏ°Ô ÇÑ´Ù.
- Sartorius Biostat¢ç RM TX Twin bioreactor
- Flexsafe¢ç RM TX bag
- 4Cell¢ç Nutri-T medium
Material & Methods
Materials
- Biostat¢ç B Twin controller unit
- Biostat¢ç RM TX Twin system
- Flexsafe¢ç RM TX bags (2L) with perfusion membrane and single-use pH and DO sensors
- 4Cell¢ç Nutri-T mediu
Cells
Human primary T-cells Àº ³Ãµ¿º¸°üµÈ PBMC (peripheral blood mononuclear cell, donor 1 & donor 2) ¸¦ ÀÌ¿ëÇÏ¿´À¸¸ç ÀÌ cell À» Çص¿½ÃŲ ÈÄ
T-cell culture medium (4Cell¢ç Nutri-T medium supplemented with 600 U/mL IL-2) ¿¡¼ 37¡É 5% CO©ü incubator ¿¡¼
2 x 10^6 cells/ml cell density ·Î seed culture ÇÏ¿´´Ù. ±× ´ÙÀ½³¯ ¼¼Æ÷¸¦ new flask ¿¡ ¿Å±ä ÈÄ 1 x 10^6 cells/ml cell density ¿¡¼
1:100 TransActTM À» ÀÌ¿ëÇÏ¿© ¼¼Æ÷¸¦ activation ÇÏ¿´´Ù.
Transduction
24½Ã°£ activation ÇÑ ÈÄ anti-CD19 CAR ¿Í truncated form of the epidermal growth factor receptor (EGFRt) ¸¦ coding ÇÏ´Â VSV-G pseudotyped lentiviral vectors ¸¦ T-cell ¿¡ transduction ÇÏ¿´´Ù.
EGFRt ´Â transduction marker ·Î »ç¿ëµÈ´Ù.
Lentivirus infection ÀÌƲ ÈÄ ¹è¾ç medium À» »õ medium À¸·Î °¥¾ÆÁÖ¾ú´Ù.
CAR T-cell expansion in the Biostat¢ç RM TX Twin system
Two donors ÀÇ cell À» ÀÌ¿ëÇϹǷΠµÎ °³ÀÇ ¼¼Æ÷¸¦ µ¿½Ã¿¡ °¡µ¿ÇÒ ¼ö ÀÖ´Â Biostat RM TX Twin bioreactor system À» »ç¿ëÇÏ¿´À¸¸ç ¿©±â¿¡ »ç¿ëµÇ´Â culture bag Àº
1.2§ perfusion membrane À» ÀåÂøÇÑ Flexsafe RM TX ÀÏȸ¿ë 2L bag À» »ç¿ëÇÏ¿´°í ¶ÇÇÑ ÀÏȸ¿ë pH & DO ¼¾¼¸¦ ÀÌ¿ëÇÏ¿´´Ù.
Seed culture µÈ T- cell À» 0.3 Liter ÀÇ 4Cell¢ç Nutri-T medium (supplemented with
600 U/mL IL-2) ¿¡ 0.5 x 10^6 cells/ml ÀÇ density ·Î inoculation ÇÏ¿´´Ù.
ÇÏ·ç¿Í ÀÌƲ µÚ¿¡ °¢°¢ ÃÑ volume ÀÌ 0.6L, 1.0L °¡ µÇµµ·Ï medium À» Ãß°¡ÇÏ¿´´Ù.
3ÀÏ°ºÎÅÍ 5ÀÏ°±îÁö 4Cell¢ç Nutri-T medium ¸¦ ÀÌ¿ëÇÏ¿© 600ml/d ÀÌ µÇµµ·Ï perfusion À» ½ÃÇàÇÏ¿´´Ù.
Determination of transduced cells
¹è¾çµÈ ¼¼Æ÷ Áß¿¡ lentivirus ¿¡ infection µÈ Transduced cell ÀÌ ¾î´À Á¤µµÀÎÁö È®ÀÎÇϱâ À§ÇØ anti-human EGFR phycoerythrin - conjugated antibody ¸¦ ÀÌ¿ëÇÏ¿© È®ÀÎÇÏ¿´´Ù.
Cell count & viability measurement
Trypan blue ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿© transduced¼¼Æ÷¼ö¿Í viability ¸¦ ÃøÁ¤ÇÏ¿´´Ù.
Results
Monitoring of CAR-T expansion
¹è¾ç 5ÀÏÀÌ Áö³ ÈÄ two donor ÀÇ total cell density ´Â 7.7 - 7.8 x 10^9 cells/L °¡ µÇ¾ú°í Viability ´Â 90% ÀÌ»óÀÌ µÇ¾ú´Ù.
ÀÌ´Â ¼¼Æ÷µéÀÌ bioreactor ÀÇ rocking motion ¿¡ Àß ÀûÀÀÇÏ¿´°í ¶ÇÇÑ ½ÇÇàÇÑ process parameter ¿Í feeding regime ÀÌ
cell viability ÀÇ È¸º¹¿¡ È¿°ú°¡ ÁÁ¾Ò´Ù´Â °ÍÀ» ÀǹÌÇÑ´Ù.
¹è¾çµÈ ¼¼Æ÷¿¡¼ CAR-T cell ÀÇ ¼ö¸¦ ÃøÁ¤ÇÑ °á°ú ¹è¾ç 5ÀÏ°¿¡ donor 1 Àº 1.5 x 10^8 ÀÌ°í donor 2 ´Â
5.2 x 10^7 ·Î¼ donor 1 ÀÇ CAR-T cell ÀÌ donor 2 º¸´Ù ¾à 3¹è ´õ ¸¹¾Ò´Ù. ÀÌ´Â donor 1 ¿¡¼ÀÇ
transduction efficiency °¡ ´õ ÁÁ¾Ò±â ¶§¹®ÀÏ °ÍÀ¸·Î »ý°¢µÈ´Ù.
Online monitoring of pH and DO
ÀÌ case study ¿¡¼´Â 5% CO2 ¿Í 95% air Á¶°Ç¿¡¼ CAR-T cell À» ¹è¾çÇÏ¿´À¸¸ç Flexsafe RM TX single-use 2 L bag ¿¡ ÀåÂøµÈ pH, DO ÀÏȸ¿ë ¼¾¼¸¦ ÀÌ¿ëÇÏ¿© ¿¬¼ÓÀûÀ¸·Î pH ¿Í DO ¸¦ ÃøÁ¤ÇÏ¿´´Ù
Figure 4 ¿¡¼ º¸µíÀÌ µÎ sample ÀÇ pH, DO º¯È´Â À¯»çÇÑ ÆÐÅÏÀ» º¸ÀδÙ.
pH ÀÇ °æ¿ì inoculation ÈÄ 7.6±îÁö »ó½ÂÇß´Ù°¡ ¼¼È÷ ÇÏ°ÇÏ¿© ¹è¾ç ¸¶Áö¸· ´Ü°è¿¡¼ 7.2 - 7.3 ¿¡ ¸Ó¹°·¶´Ù.
DO ´Â ¹è¾ç 2ÀÏ°±îÁö ¾à°£ÀÇ °¨¼Ò°¡ Àִµ¥ ÀÌ°ÍÀº ÀÌ ±â°£Áß¿¡ fed-batch mode ¿¡ °ø±ÞµÇ´Â medium fed ´Â
DO ¸¦ ÀÏÁ¤ÇÏ°Ô À¯ÁöÇϴµ¥ ÃæºÐÇÏ´Ù´Â °ÍÀ» ÀǹÌÇÑ´Ù. 3ÀÏ° ºÎÅÍ´Â perfusion mode °¡ ½ÃÀ۵ǰí À̶§ºÎÅÍ DO ´Â
ÇöÀúÈ÷ °¨¼ÒÇϱ⠽ÃÀÛÇϴµ¥ ÀÌ´Â ÀÌ ½Ã±â¿¡ ¼¼Æ÷°¡ ±Þ°ÝÇÏ°Ô Áõ°¡ÇÔ¿¡ µû¸¥ DO ¼Ò¸ð¸¦ perfused fresh medium ÀÌ
º¸ÃæÇÏÁö ¸øÇÏ°í ÀÖ´Ù´Â °ÍÀ» ÀǹÌÇÑ´Ù.
°á·ÐÀûÀ¸·Î ¾Æ¹«°Íµµ Á¶ÀýÇÏÁö ¾Ê±â ¶§¹®¿¡ ¿¹»óÇÑ´ë·Î pH ¿Í DO ´Â °¨¼ÒÇÑ´Ù. ±×·¯³ª Èï¹Ì·Ó°Ôµµ
ÀÌ ½Ã°£µ¿¾È ¼¼Æ÷¼ö¿Í viability ´Â Áõ°¡¼¼¸¦ À¯ÁöÇϴµ¥ ÀÌ´Â Àû¿ëÇÏ°í ÀÖ´Â parameter °¡ ¼¼Æ÷ ¹è¾ç¿¡
ÃæºÐÇÏ´Ù´Â °ÍÀ» ÀǹÌÇÑ´Ù.
Discussion
À̹ø case study ¿¡¼ ¿ì¸®´Â ´ÙÀ½°ú °°Àº ³»¿ëÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù.
Sartorius T-Cell Expansion Solution Àº CAR-T cell À» ¼º°øÀûÀ¸·Î expansion ÇÏ¿´´Ù.
Ãʱâ inoculation ÇÒ ¶§¿¡ cell viability °¡ 55-65% ·Î ³·Àº »óÅ¿´Áö¸¸ expansion À» ÇÒ ¶§¿¡´Â 90% ÀÌ»óÀÇ cell viability ¸¦ º¸¿´´Ù.
ÀåÂøµÇ¾î ÀÖ´Â ÀÏȸ¿ë optical pH & DO sensor ´Â expansion Àü °úÁ¤¿¡¼ pH ¿Í DO ¸¦ ¿¬¼ÓÀûÀ¸·Î monitoring ÇÒ ¼ö ÀÖ¾ú´Ù.
Ãʱ⿡´Â pH ¿Í DO ÀÇ °¨¼Ò°¡ ÀÖ¾úÁö¸¸ cell number ¿Í viability ´Â ¼º°øÀûÀ¸·Î À¯Áö µÇ¾ú´Ù.
Conclusion
Sartorius T-Cell Expansion Solution Àº CAR T-cell expansion ½Ã½ºÅÛ °³¹ß¿¡ ¸Å¿ì È¿À²ÀûÀÌ°í »ç¿ëÀÌ ¸Å¿ì Æí¸®ÇÑ solution ÀÌ´Ù.
T-cell yield ´Â ÀÓ»ó¿¡ ÀûÇÕÇÑ 1 x 10^8 ÀÌ»óÀ̾ú´Ù
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