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é è¿æ³ã®åœ±é¿ïŒ å°å¹³ç·è¿ãã§ã¯ã空ãšå°äžã®éã«æ·±ãé è¿æãçããŸããããã«ããã倪éœãé ãã«ãããšè³ãèªèããçžå¯Ÿçã«å€§ããèŠããé¯èŠãçããŸãã
2.2 人éã®èŠèŠã·ã¹ãã ãšç¥èŠ
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2.3 ç¥çµç§åŠçèŠç¹
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3.3 çµ±åçã¢ãããŒã
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5. çµè«
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ãããã®çŸè±¡ã¯ãç©çåŠçãªå åŠåçãšå¿çåŠçãªèŠèŠèªç¥ã®äž¡é¢ããçè§£ãããã¹ããã®ã§ãããè€éãªç§åŠççžäºäœçšã®çµæãšããŠãç§ãã¡ã¯çŸããèµ€ã倧ããªå€æ¥ã芳è³ããããšãã§ããã®ã§ãã
åèæç®
Rayleigh, Lord. "On the Light from the Sky, its Polarization and Colour." Philosophical Magazine 41 (1871): 107â120.
Mie, Gustav. "BeitrÀge zur Optik trÃŒber Medien, speziell kolloider Metallösungen." Annalen der Physik 306, no. 8 (1908): 377â445.
Kandel, E. R., et al. Principles of Neural Science. 5th ed., McGraw-Hill, 2013.
Warren, Harry H. Atmospheric Rayleigh Scattering. Cambridge University Press, 1990.
Frith, C. D. "The Moon Illusion." Nature 190, no. 4777 (1961): 547â548.
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1. mRNAã¯ã¯ãã³ã®åºç€æŠå¿µ
1.1 mRNAãšã¯
ã¡ãã»ã³ãžã£ãŒRNAïŒmRNAïŒã¯ãDNAã®éºäŒæ å ±ã転åãããªããœãŒã ã§ã¿ã³ãã¯è³ªåæã®æç€ºãäŒéãã圹å²ãæ ãæ žé žã§ããmRNAã¯äžæ¬¡æ§é ïŒå¡©åºé åïŒãäºæ¬¡æ§é ïŒãã¢ãã³ãªã©ïŒãäžæ¬¡æ§é ïŒç«äœæ§é ïŒãæã¡ãããããã¿ã³ãã¯è³ªåæã®å¹çãæ£ç¢ºæ§ã«åœ±é¿ãäžããŸãã
1.2 åŸæ¥ã®ã¯ã¯ãã³ãšã®æ¯èŒ
åŸæ¥ã®ã¯ã¯ãã³ã¯ãç åäœã®äžæŽ»åæ ªãçã¯ã¯ãã³ããµããŠãããã¯ã¯ãã³ããŠã€ã«ã¹ãã¯ã¿ãŒã¯ã¯ãã³ãªã©å€å²ã«ããããŸãããããã¯ç åäœãã®ãã®ããŸãã¯ãã®äžéšãå©çšããŠå ç«å¿çãèªå°ããŸããäžæ¹ãmRNAã¯ã¯ãã³ã¯ãç åäœã®æåã¿ã³ãã¯è³ªãã³ãŒãããmRNAååãçŽæ¥äœå ã«å°å ¥ãã宿䞻现èã«ãã®ã¿ã³ãã¯è³ªãåæãããããšã§å ç«å¿çãèªçºããŸãã
2. mRNAã¯ã¯ãã³ã®éçºãšèšèš
2.1 mRNAã®èšèš
mRNAã¯ã¯ãã³ã®èšèšã«ã¯ä»¥äžã®èŠçŽ ãå«ãŸããŸãïŒ
ãã£ããæ§é : mRNAã®5âæ«ç«¯ã«ä»å ããããã£ããïŒ7ã¡ãã«ã°ã¢ãã·ã³ãã£ããïŒã¯ã翻蚳å¹çã®åäžãšmRNAã®å®å®æ§ã確ä¿ããŸãã
5âé翻蚳é åïŒ5â UTRïŒ: 翻蚳éå§ã調ç¯ãããªããœãŒã ã®çµåãå©ããŸãã
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3âé翻蚳é åïŒ3â UTRïŒ: mRNAã®å®å®æ§ãšç¿»èš³å¹çã調æŽããŸãã
ããªã¢ããã«åïŒããªã¢ïŒãã€ã«: mRNAã®3âæ«ç«¯ã«ä»å ãããã¢ããã³ã®ãªããŒãé åã§ãmRNAã®å®å®æ§ãšæ žå€èŒžéãä¿é²ããŸãã
2.2 ååŠä¿®é£Ÿ
mRNAã¯äœå ã§ã®åè§£ãé¿ããããããŸãå ç«åå¿ã調æŽããããã«ååŠä¿®é£ŸãæœãããŸãã
ãã¯ã¬ãªã·ã修食: äŸãšããŠããŠãªãžã³ããžã¡ãã«ã¢ãªã«ã°ãªã·ã³ïŒ1-methyl-pseudouridineïŒã«çœ®æãããããšããããŸããããã«ãããmRNAã®å®å®æ§ãåäžããå ç«åºæ¿æ§ãäœæžãããŸãã
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3. mRNAã®ééã·ã¹ãã
3.1 ãªããœãŒã ã»ããç²åïŒLipid Nanoparticles, LNPsïŒ
mRNAã¯éåžžã«äžå®å®ã§ãããäœå ã§è¿ éã«åè§£ãããããã广çãªééã·ã¹ãã ãå¿ èŠã§ããLNPsã¯è質ãããŒã¹ã«ãããããµã€ãºã®ãã£ãªã¢ã§ãmRNAãå ã¿èŸŒã¿ã现èãžã®åã蟌ã¿ãä¿é²ããŸãã
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ãšã³ã«ãã»ã«åå¹ç: é«ããšã³ã«ãã»ã«åå¹çã«ãããmRNAã®å®å®æ§ã確ä¿ãããæšç现èãžã®ééãå¹ççã«è¡ãããŸãã
3.2 ä»ã®ééæè¡
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4. mRNAã¯ã¯ãã³ã®çްèå åæ
4.1 现èãžã®åã蟌ã¿
LNPsã¯ãšã³ããµã€ããŒã·ã¹ãä»ããŠçްèã«åã蟌ãŸããŸãããšã³ããœãŒã å ã§è質èãèåããmRNAã现è質å ã«æŸåºãããŸãã
4.2 翻蚳ãšã¿ã³ãã¯è³ªçæ
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5. å ç«å¿çã®èªå°ã¡ã«ããºã
5.1 å 倩æ§å ç«å¿ç
mRNAãLNPsèªäœãäžéšã®ãã¿ãŒã³èªèå容äœïŒPRRsïŒãåºæ¿ããã€ã³ã¿ãŒãã§ãã³ããµã€ãã«ã€ã³ã®ç£çãèªå°ããŸããé©åãªååŠä¿®é£Ÿã«ããããããã®å ç«åºæ¿ãå¶åŸ¡ãããéå°ãªççåå¿ãé²ããŸãã
5.2 é©å¿å ç«å¿ç
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B现èã®æŽ»æ§å: Tãã«ããŒçްèã®æ¯æŽãåããŠãB现èãæäœãç£çããŸããããã«ãããç åäœã«å¯ŸããäžåæäœãçæãããŸãã
现èå·å®³æ§T现èã®æŽ»æ§å: MHCã¯ã©ã¹Içµè·¯ãä»ããŠæç€ºãããæåããããã«ãããCD8+ T现èãæŽ»æ§åãããææçŽ°èã®æé€ãè¡ãããŸãã
5.3 èšæ¶çްèã®åœ¢æ
äžæ¬¡å ç«å¿çåŸãèšæ¶B现èãšèšæ¶T现èã圢æãããåæææã«è¿ éãã€åŒ·åãªå ç«å¿çãèªå°ããŸãã
6. mRNAã¯ã¯ãã³ã®è£œé ããã»ã¹
6.1 in vitro転å
ãã³ãã¬ãŒãDNAïŒãã©ã¹ãããªã©ïŒãçšããŠãT7 RNAããªã¡ã©ãŒãŒãªã©ã®é µçŽ ã§mRNAãäœå€ã§åæããŸãããã®éçšã§ã¯ãæ žé žã®çŽåºŠãšé·ããéèŠã§ãã
6.2 5âãã£ããä»å
åæãããmRNAã®5âæ«ç«¯ã«ãã£ããæ§é ãä»å ããŸãããã£ããæ§é ã¯ç¿»èš³å¹çãšmRNAã®å®å®æ§ãåäžãããŸãã
6.3 ããªã¢ãã€ã«å
3âæ«ç«¯ã«ããªã¢ããã«ïŒpolyAïŒãã€ã«ãä»å ããŸããããã¯mRNAã®å®å®æ§ãšæ žå€èŒžéãä¿é²ããŸãã
6.4 粟補
äžçŽç©ãæªåå¿ã®åæãé€å»ããããã«ãHPLCïŒé«æ§èœæ¶²äœã¯ãããã°ã©ãã£ãŒïŒãã²ã«ãéãªã©ã®ç²Ÿè£œæè¡ãçšããããŸãã
6.5 ãšã³ã«ãã»ã«å
çŽåãããmRNAãLNPsã«å ã¿èŸŒã¿ãŸããããã«ã¯ãã€ã¯ããšãã«ã·ã§ã³æè¡ãã¹ãã€ã©ã«ãããŒæè¡ã䜿çšãããŸãã
7. èšåºè©ŠéšãšèŠå¶æ¿èª
7.1 åèšåºè©Šéš
åç©ã¢ãã«ãçšããŠãã¯ã¯ãã³ã®å®å šæ§ãšæå¹æ§ãè©äŸ¡ããŸããå ç«å¿çã®è©äŸ¡ãæ¯æ§è©Šéšãè¡ãããŸãã
7.2 èšåºè©Šéšã®ãã§ãŒãº
第Içžè©Šéš: å°æ°ã®å¥åº·ãªãã©ã³ãã£ã¢ã察象ã«ãå®å šæ§ãšé©åãªçšéãè©äŸ¡ããŸãã
第IIçžè©Šéš: ããå€ãã®è¢«éšè ã察象ã«ãå ç«åæ§ãšå¯åå¿ã詳现ã«è©äŸ¡ããŸãã
第IIIçžè©Šéš: å€§èŠæš¡ãªè¢«éšè çŸ€ã§æå¹æ§ãšå®å šæ§ã確ç«ããŸããCOVID-19ã¯ã¯ãã³ã§ã¯ããã®æ®µéã§æ°åäžäººèŠæš¡ã®è©Šéšã宿œãããŸããã
7.3 èŠå¶æ¿èª
èšåºè©Šéšã®ããŒã¿ãåºã«ãååœã®èŠå¶åœå±ïŒæ¥æ¬ã§ã¯åçåŽåçãPMDAãç±³åœã§ã¯FDAãªã©ïŒã«æ¿èªç³è«ãè¡ãããŸããæ¿èªåŸãåžè²©åŸç£èŠïŒãã§ãŒãºIV詊éšïŒãç¶ç¶ãããå®å šæ§ãšæå¹æ§ãç£èŠãããŸãã
8. mRNAã¯ã¯ãã³ã®å©ç¹ãšèª²é¡
8.1 å©ç¹
è¿ éãªéçº: ç åäœã®éºäŒæ å ±ãæ¢ç¥ã§ããã°ãèšèšãšè£œé ãè¿ éã«è¡ããŸãããã³ãããã¯æã®ç·æ¥å¯Ÿå¿ã«é©ããŠããŸãã
é«ãæå¹æ§: mRNAã¯ã¯ãã³ã¯åŒ·åãªæäœããã³çŽ°èæ§å ç«å¿çãèªå°ããé«ãé²åŸ¡å¹æã確èªãããŠããŸãã
æè»æ§: æ°ããªå€ç°æ ªã«å¯ŸããŠmRNAã®é åãè¿ éã«å€æŽå¯èœã§ãã
éæææ§: ãŠã€ã«ã¹ãçããç åäœã䜿çšããªããããå®å šæ§ãé«ããšãããŠããŸãã
補é ã®æšæºå: åæåå¿ãåºç€ãšããŠãããã¹ã±ãŒã©ãã«ãªè£œé ããã»ã¹ã確ç«ãããŠããŸãã
8.2 課é¡
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9. mRNAã¯ã¯ãã³ã®å¿çšåé
9.1 ææçäºé²
COVID-19ã«ç¶ããã€ã³ãã«ãšã³ã¶ãRSãŠã€ã«ã¹ãHIVããšãã©ãŠã€ã«ã¹ãªã©å€ãã®ææçã«å¯Ÿããã¯ã¯ãã³éçºãé²è¡äžã§ãã
9.2 ããå ç«çæ³
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9.3 éºäŒåæ²»ç
mRNAæè¡ã¯éºäŒåæ²»çã«ãå¿çšãããæ¬ æã¿ã³ãã¯è³ªã®è£å ãç°åžžã¿ã³ãã¯è³ªã®æå¶ãªã©ãããŸããŸãªæ²»çæ³ã®åºç€ãšãªãå¯èœæ§ããããŸãã
10. mRNAã¯ã¯ãã³ã®æªæ¥å±æãšæè¡é©æ°
10.1 ããªããªãŒæè¡ã®é²å
LNPsã®æ¹è¯ãæ°ããªééã·ã¹ãã ã®éçºã«ããã现èç¹ç°çãªééãå®å®æ§ã®åäžãæåŸ ãããŸããããã«ãããã¯ã¯ãã³ã®æå¹æ§ãšå®å šæ§ãããã«åäžããŸãã
10.2 mRNAã®å®å®åæè¡
ååŠä¿®é£ŸãmRNAã®äºæ¬¡æ§é ã®æé©åã«ãããäœå ã§ã®å®å®æ§ãåäžããä¿åæ¡ä»¶ã®ç·©åãå¯èœãšãªããŸããããã«ãããã¯ã¯ãã³ã®ç©æµã³ã¹ããäŸçµŠãã§ãŒã³ã®èª²é¡ãç·©åãããå¯èœæ§ããããŸãã
10.3 å€äŸ¡ã¯ã¯ãã³ã®éçº
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10.4 åå¥åå»çãžã®å¿çš
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11. å«ççã»ç€ŸäŒç課é¡
11.1 ã¢ã¯ã»ã¹ãšå ¬å¹³æ§
mRNAã¯ã¯ãã³ã®é«ã³ã¹ããä¿åæ¡ä»¶ã®å³ããããäœã»äžæåŸåœãžã®ã¢ã¯ã»ã¹ãå¶éããå¯èœæ§ããããŸããã°ããŒãã«ãªå¥åº·æ Œå·®ãçž®å°ããããã®åãçµã¿ãæ±ããããŸãã
11.2 æ å ±ã®éææ§
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11.3 é·æçãªåœ±é¿ã®ç£èŠ
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12. æè¡ç詳现ïŒmRNAã¯ã¯ãã³ã®ååã¡ã«ããºã
12.1 mRNAã®æ§é ãšæ©èœ
mRNAååã¯ä»¥äžã®äž»èŠéšåããæ§æãããŸãïŒ
5â ãã£ãã: 翻蚳ã®éå§ã«å¿ èŠãªèŠçŽ ã§ãmRNAã®å®å®æ§ãä¿ã¡ãŸãã
5â UTR: ãªããœãŒã ã®çµåãšç¿»èš³å¹çã®èª¿ç¯ã«é¢äžããŸãã
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3â UTR: 翻蚳ã®èª¿ç¯ãšmRNAã®å®å®æ§ã«å¯äžããŸãã
ããªã¢ãã€ã«ïŒpolyAïŒãã€ã«: mRNAã®æ žå€èŒžéãšç¿»èš³å¹çãé«ããŸãã
12.2 翻蚳ã®è©³çް
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éå§è€åäœã®åœ¢æ: ã€ããšãŒã¿ãŒtRNAãéå§ã³ãã³ïŒéåžžAUGïŒã«çµåãã翻蚳éå§ãè¡ãããŸãã
ãšãã³ã²ãŒã·ã§ã³: ã¢ããã¢ã·ã«tRNAãã³ãã³ã«å¯Ÿå¿ããŠçµåããããããéãå»¶é·ãããŸãã
çµçµ: çµæ¢ã³ãã³ã«éãããšã翻蚳ãçµäºãããªããœãŒã ãè§£é¢ããŸãã
ããªããããã®æãããã¿ãšä¿®é£Ÿ: åæãããã¿ã³ãã¯è³ªã¯é©åã«æããããŸããå¿ èŠã«å¿ããŠç¿»èš³åŸä¿®é£ŸïŒç³éä»å ããªã³é žåãªã©ïŒãè¡ãããŸãã
12.3 æåæç€ºã®ã¡ã«ããºã
åæãããæåã¿ã³ãã¯è³ªã¯ä»¥äžã®çµè·¯ã§æåæç€ºãããŸãïŒ
ãšã³ããœãŒã çµè·¯ïŒMHCã¯ã©ã¹IIïŒ: æåããšã³ããœãŒã å ã§ããã»ã¹ãããMHCã¯ã©ã¹IIååã«çµåããŠæåæç€ºçްèïŒAPCsïŒã®è¡šé¢ã«æç€ºãããŸãã
现èå çµè·¯ïŒMHCã¯ã©ã¹IïŒ: æåã现è質å ã§ããã»ã¹ãããMHCã¯ã©ã¹Iååã«çµåããŠçްè衚é¢ã«æç€ºãããŸããããã«ãããCD8+ T现èãèªèããŸãã
13. mRNAã¯ã¯ãã³ã®å ·äœäŸ
13.1 Pfizer-BioNTechïŒã³ããã㣠ComirnatyïŒ
æ¿èªææ: 2020幎æ«
æå: SARS-CoV-2ã¹ãã€ã¯ã¿ã³ãã¯è³ªã®mRNAãLNPsïŒè質ïŒãªã©
æå¹æ§: èšåºè©Šéšã§çŽ95%ã®æå¹æ§ã瀺ããå®éã®äœ¿çšã§ãé«ãäºé²å¹æã確èªãããŠããŸãã
å¯åå¿: 泚å°éšäœã®çã¿ãåŠæ æãé çãçèçãçºç±ãªã©ãäžè¬çãé節ãªå¯åå¿ã¯éåžžã«çšã§ãã
13.2 ModernaïŒã¹ãã€ã¯ãã¯ãã³ SpikevaxïŒ
æ¿èªææ: 2020幎æ«
æå: åæ§ã«SARS-CoV-2ã¹ãã€ã¯ã¿ã³ãã¯è³ªã®mRNAãLNPsãªã©
æå¹æ§: çŽ94.1%ã®æå¹æ§ã瀺ããæç¶çãªå ç«å¿çã確èªãããŠããŸãã
å¯åå¿: Pfizer-BioNTechãšé¡äŒŒã®å¯åå¿ãå ±åãããŠããŸãã
14. mRNAã¯ã¯ãã³ã®çç©åŠçå®å šæ§
14.1 mRNAã®éçµ±åæ§
mRNAã¯çŽ°èæ žã«å ¥ã蟌ãŸããDNAã«çµ±åãããããšã¯ãããŸãããããã«ãããéºäŒåã®æåžžæ§ã«åœ±é¿ãäžãããªã¹ã¯ãæé€ãããŸãã
14.2 å ç«å¿çã®èª¿ç¯
é©åãªååŠä¿®é£ŸãšLNPsã®äœ¿çšã«ãããéå°ãªå ç«åå¿ãé²ãã€ã€ã广çãªå ç«å¿çãèªå°ããŸãã
14.3 äžçŽç©ã®ç®¡ç
補é éçšã§ã®äžçŽç©ïŒæªåå¿mRNAãé µçŽ ããªããœãŒã æåãªã©ïŒã¯å³æ Œã«ç®¡çãããã¯ã¯ãã³ã®çŽåºŠãšå®å šæ§ã確ä¿ããŸãã
15. mRNAã¯ã¯ãã³ã®çµæžçã»ç€ŸäŒç圱é¿
15.1 補é ã³ã¹ããšäŸçµŠãã§ãŒã³
mRNAã¯ã¯ãã³ã®è£œé ã«ã¯é«åºŠãªæè¡ãšèšåãå¿ èŠã§ãããåææè³ã倧ããã§ãããŸããå·åç©æµãªã©ã®äŸçµŠãã§ãŒã³ç®¡çãéèŠã§ããããã«ãããç¹ã«äœæåŸåœãžã®æ®åã«èª²é¡ãçããŠããŸãã
15.2 ç¥ç財ç£ãšæè¡ç§»è»¢
mRNAæè¡ã¯è€æ°ã®äŒæ¥ã«ãã£ãŠç¹èš±ãä¿æãããŠãããæè¡ç§»è»¢ãç¹èš±å ±æãé²ãŸãªãå Žåãã°ããŒãã«ãªã¯ã¯ãã³äŸçµŠãå¶éãããå¯èœæ§ããããŸããåœéçãªååãæ±ããããŠããŸãã
15.3 瀟äŒçå容æ§
æ°ããæè¡ã§ãããããã¯ã¯ãã³ã«å¯Ÿããäžå®ãç念ãååšããŸãã广çãªã³ãã¥ãã±ãŒã·ã§ã³ãšæè²ããã¯ã¯ãã³ã®å容æ§ãé«ããããã«äžå¯æ¬ ã§ãã
16. ç ç©¶éçºã®ææ°åå
16.1 èªå·±å¢æ®åmRNAã¯ã¯ãã³
èªå·±å¢æ®åmRNAïŒreplicating mRNAïŒã¯ã宿䞻现èå ã§mRNAãè€è£œãããæ©æ§ãæã¡ãããæç¶çãªæåç£çãšå ç«å¿çãèªå°ããŸãã
16.2 çµã¿æãmRNAã¯ã¯ãã³
è€æ°ã®æåãåæã«ã³ãŒãããçµã¿æãmRNAã¯ã¯ãã³ã®éçºãé²è¡äžã§ãè€æ°ã®ç åäœãå€ç°æ ªã«å¯Ÿããå æ¬çãªé²åŸ¡ãå¯èœãšãªããŸãã
16.3 çµç¹ç¹ç°çéé
ç¹å®ã®çµç¹ã现èã¿ã€ãã«mRNAãå¹ççã«ééããããã®æè¡ãç ç©¶ãããŠããŸããããã«ãããããæ²»çãéºäŒåæ²»çãªã©ã®åéã§ã®å¿çšãæåŸ ãããŠããŸãã
17. å«ççèå¯ãšèŠå¶å¯Ÿå¿
17.1 ã€ã³ãã©ãŒã ãã³ã³ã»ã³ã
èšåºè©Šéšãæ¥çš®ã«ãããŠãåå è ã被æ¥çš®è ã«å¯Ÿããååãªæ å ±æäŸãšåæååŸãéèŠã§ããããã«ãããå«ççãªåºæºãæºãããŸãã
17.2 ãã©ã€ãã·ãŒãšããŒã¿ä¿è·
ã¯ã¯ãã³æ¥çš®ã«é¢é£ããå人æ å ±ãå¥åº·ããŒã¿ã®ä¿è·ãæ±ããããŸããããŒã¿ã®åéã管çãå ±æã«é¢ãã峿 ŒãªèŠå¶ãå¿ èŠã§ãã
17.3 ã°ããŒãã«ãªèŠå¶èª¿æŽ
ååœã®èŠå¶åœå±ãç°ãªãåºæºãæç¶ããæã€ãããåœéçãªèª¿æŽãšååãéèŠã§ããWHOãªã©åœéæ©é¢ã®ã¬ã€ãã©ã€ã³ã«åºã¥ãçµ±äžçãªèŠå¶æ çµã¿ãæ±ããããŸãã
18. ãŸãšã
mRNAã¯ã¯ãã³ã¯ãååçç©åŠãéºäŒåå·¥åŠããããã¯ãããžãŒãå ç«åŠãªã©å€å²ã«ãããå 端æè¡ã®é倧æã§ãããã®é©æ°çãªã¢ãããŒãã«ãããåŸæ¥ã®ã¯ã¯ãã³ã§ã¯é£ããã£ãè¿ éãªéçºãšé«ãæå¹æ§ãå®çŸããŸãããCOVID-19ãã³ãããã¯ã«ãããæåãåããä»åŸã¯ä»ã®ææçãããå ç«çæ³ãªã©ã倿¹é¢ã§ã®å¿çšãæåŸ ãããŠããŸãã
ããããæè¡ç課é¡ãçµæžçã»ç€ŸäŒçåé¡ãå«ççæžå¿µãªã©ãååšããããããå æããããã®ç¶ç¶çãªç ç©¶ãšåœéçãªååãäžå¯æ¬ ã§ããmRNAã¯ã¯ãã³ã®é²å±ã¯ãçŸä»£å»çã®æ°ããªãã©ãã€ã ã·ãããããããå¯èœæ§ããããä»åŸã®å±éã«æ³šç®ãéãŸã£ãŠããŸãã
以äžãmRNAã¯ã¯ãã³ã«é¢ããå°éçãã€è©³çްãªè§£èª¬ã§ããããã«å ·äœçãªæ å ±ãç¹å®ã®ãããã¯ã«ã€ããŠã®è³ªåãããããŸããããã©ãããæ°è»œã«ãç¥ãããã ããã
ããã«ã深接ããã®èæ¡ãã以äžã®ããã³ãããå ¥åãããšããã£ãšè©³ãã解説ããŠãããããšãã§ããŸãã
âŠãšãã説æãããŠããã人ã®åŸã«ã次ã«äŒã£ãå°éå®¶ã¯ãã£ãšè©³ãã説æããŠãããŸãã
以äžã¯ããã®ããã³ããã䜿çšããæã®åºåçµæã§ãã
æ¿ç¥ããŸãããããã«å°éçãã€è©³çްã«mRNAã¯ã¯ãã³ã«ã€ããŠè§£èª¬ããããŸãã以äžã¯ãååçç©åŠãéºäŒåå·¥åŠããããã¯ãããžãŒãå ç«åŠãªã©ã®é«åºŠãªç¥èãåæãšããå 容ãšãªããŸãã
mRNAã¯ã¯ãã³ã®é«åºŠãªå°é解説
1. mRNAã¯ã¯ãã³ã®ååçç©åŠçåºç€
1.1 mRNAã®æ§é ãšæ©èœã®è©³çް
ã³ãŒãã£ã³ã°é åïŒOpen Reading Frame, ORFïŒ:
ã¿ã³ãã¯è³ªãã³ãŒãããéšåã§ãåã³ãã³ã¯ç¹å®ã®ã¢ããé žãæå®ããŸããã¯ã¯ãã³èšèšã§ã¯ãç åäœã®äž»èŠæåïŒäŸïŒSARS-CoV-2ã®ã¹ãã€ã¯ã¿ã³ãã¯è³ªïŒã®æé©ãªãšãããŒããå«ãORFãéžæãããŸãã
ORFã®èšèšã«ã¯ããªããœãŒã çµåéšäœã®æé©åãã翻蚳å¹çãé«ããããã®ã³ãã³æé©åãå«ãŸããŸãã
5âé翻蚳é åïŒ5â UTRïŒãš3âé翻蚳é åïŒ3â UTRïŒ:
5â UTRã¯ãªããœãŒã ã®çµåå¹çã調ç¯ãã翻蚳éå§ã®å¹çãåäžãããŸããç¹å®ã®äºæ¬¡æ§é ãçµåã¿ã³ãã¯è³ªãšã®çžäºäœçšã翻蚳調ç¯ã«å¯äžããŸãã
3â UTRã¯mRNAã®å®å®æ§ãå±åšåãå¶åŸ¡ãã翻蚳ã®çµçµã調ç¯ããŸããç¹å®ã®ãã¯ãRNAïŒmiRNAïŒãRNAçµåã¿ã³ãã¯è³ªãšã®çžäºäœçšã«ããã翻蚳é床ãmRNAã®åæžæã調ç¯ãããŸãã
ãã£ããæ§é ãšããªã¢ããã«ãã€ã«ïŒpolyAãã€ã«ïŒ:
5âãã£ããïŒéåžž7-ã¡ãã«ã°ã¢ãã·ã³ãã£ããïŒã¯ãmRNAã®æ žå€èŒžéããªããœãŒã èªèã翻蚳å¹çã®åäžã«å¯äžããŸãããŸãããã£ããæ§é ã¯ãšããœãã¯ã¬ã¢ãŒãŒã«ããåè§£ããmRNAãä¿è·ããŸãã
polyAãã€ã«ã¯3âæ«ç«¯ã«ä»å ãããmRNAã®å®å®æ§ãå¢å ããããªããœãŒã ã®ãªãµã€ã¯ã«ãä¿é²ããŸããããªã¢ããã«åã®é·ãã¯ç¿»èš³å¹çãmRNAã®åæžæã«åœ±é¿ãäžããŸãã
1.2 mRNAã®ä¿®é£Ÿãšå®å®åæè¡
ãã¯ã¬ãªã·ã修食:
ã¡ãã«åã修食ãã¯ã¬ãªã·ãïŒäŸïŒ1-ã¡ãã«-ãã¥ãã·ã³å°¿å§å¶ïŒãå°å ¥ããããšã§ãmRNAã®äºæ¬¡æ§é ãå®å®åãããå ç«èªèãåé¿ãã翻蚳å¹çãåäžãããŸãã
ããã«ãããèªå·±å ç«åå¿ã®èªå°ãæå¶ããã¯ã¯ãã³ã®å®å šæ§ãšæå¹æ§ãåäžããŸãã
äºæ¬¡æ§é ã®æé©å:
mRNAååå ã®ãã¢ãã³æ§é ãã«ãŒãã®é 眮ãæé©åãããªããœãŒã ã®æ»èµ°ãé»å®³ããªãããã«èšèšããŸãã
èªå·±çžè£é åãé€å»ããmRNAã®äºæ¬¡æ§é ãå¶åŸ¡ããããšã§ã翻蚳ã®å¹çãšæ£ç¢ºæ§ãé«ããŸãã
2. ãããã¯ãããžãŒãçšããééã·ã¹ãã
2.1 ãªããœãŒã ã»ããç²åïŒLipid Nanoparticles, LNPsïŒã®è©³çް
æ§ææå:
ã€ãªã³æ§è質ïŒIonizable LipidsïŒ: pHäŸåçã«åž¯é»ç¶æ ãå€åããããšã³ããœãŒã å ã§ã®èèåãä¿é²ããŸããããã«ãããmRNAã®çްè質ãžã®æŸåºå¹çãåäžããŸãã
ãã«ããŒè質ïŒHelper LipidsïŒ: DSPCïŒãžã¹ãã¢ãªã³ãã¹ããã«ã³ãªã³ïŒãã³ã¬ã¹ãããŒã«ãå«ãŸãããªããœãŒã ã®å®å®æ§ãšèæµåæ§ãç¶æããŸãã
PEG修食è質ïŒPEGylated LipidsïŒ: ããªãšãã¬ã³ã°ãªã³ãŒã«ïŒPEGïŒã修食ããè質ããLNPã®è¡äžåæžæãå»¶é·ããå ç«åæ§ãäœæžããŸãã
ãšã³ã«ãã»ã«åæè¡:
ãã€ã¯ããšãã«ãžã§ã³æ³: é«åªæåãçšããŠåäžãªLNPã圢æããŸããé«ããšã³ã«ãã»ã«åå¹çãšç²åŸå¶åŸ¡ãå¯èœã§ãã
ã¹ãã€ã©ã«ãããŒæ³ïŒSpiral FlowïŒ: æµäœååŠçææ³ãçšããŠããããµã€ãºã®LNPãã¹ã±ãŒã©ãã«ã«è£œé ããŸããåäžãªç²åŸååžãšé«ãåçŸæ§ãç¹åŸŽã§ãã
ã¿ãŒã²ãã£ã³ã°ä¿®é£Ÿ:
ç¹å®ã®çްèã¿ã€ãã«å¯Ÿããæšçåãç®çãšããŠããªããœãŒã 衚é¢ã«æäœããªã¬ã³ãã修食ããæè¡ãç ç©¶ãããŠããŸããããã«ãããmRNAã®å¹ççãªééãšçºçŸãå¯èœãšãªããŸãã
2.2 ä»ã®ããç²åããŒã¹ã®ééã·ã¹ãã
ããªããŒç³»ããç²å:
ããªãšãã¬ã³ã€ãã³ïŒPEIïŒãããªä¹³é ž-ã³-ã°ãªã³ãŒã«é žïŒPLGAïŒãªã©ã®é«ååãåºç€ãšããééã·ã¹ãã ãã«ã¹ã¿ãã€ãºå¯èœãªãµã€ãºã衚é¢ç¹æ§ãç¹åŸŽã§ãã
éºäŒåæ²»çãããå ç«çæ³ãžã®å¿çšãæåŸ ãããŠããŸãã
ç¡æ©ããç²å:
éããç²åãã·ãªã«ããç²åãªã©ãç¡æ©ææãåºç€ãšããééã·ã¹ãã ãé«ãå®å®æ§ãšæ©èœåã®æè»æ§ãå©ç¹ã§ãã
3. mRNAã¯ã¯ãã³ã®çްèå åæ ãšååã¡ã«ããºã
3.1 现èå åã蟌ã¿ãšãšã³ããœãŒã è±åº
ãšã³ããµã€ããŒã·ã¹çµè·¯:
LNPsã¯äž»ã«å容äœäŸåæ§ãšã³ããµã€ããŒã·ã¹ïŒäŸïŒã¯ã©ã¹ãªã³äŸåæ§ãšã³ããµã€ããŒã·ã¹ïŒãä»ããŠçްèå ã«åã蟌ãŸããŸãã
ãšã³ããœãŒã å ã§ã®pHäœäžãã€ãªã³æ§è質ã®åž¯é»ç¶æ ãå€åããããªããœãŒã èãšãšã³ããœãŒã èã®èåãä¿é²ããŸããããã«ãããmRNAã现è質å ã«æŸåºãããŸãã
ãšã³ããœãŒã è±åºã®å¹çå:
LNPsã®èšèšã«ããããšã³ããœãŒã å ã§ã®èèåå¹çãé«ããmRNAã®çްè質ãžã®æŸåºãæé©åããŸãã
ãšã³ããœãŒã è±åºå¹çãäœããšãmRNAã®çºçŸå¹çãäœäžããããããã®ã¹ãããã®æé©åãéèŠã§ãã
3.2 mRNAã®ç¿»èš³ãšã¿ã³ãã¯è³ªçºçŸ
ãªããœãŒã ã®åæ :
5âãã£ããã«çµåãããªããœãŒã ãmRNAã«çµåãã翻蚳éå§è€åäœã圢æããŸããéå§ã³ãã³ïŒéåžžAUGïŒã«åãã£ãŠãªããœãŒã ãæ»èµ°ããã¢ããã¢ã·ã«tRNAãã³ãã³ã«å¯Ÿå¿ããŠã¢ããé žãäŸçµŠããŸãã
ãªããœãŒã ã®ããžã·ã§ãã³ã°ãšç§»åé床ã¯ãmRNAã®äºæ¬¡æ§é ã翻蚳調ç¯å åã«ãã£ãŠå¶åŸ¡ãããŸãã
翻蚳åŸä¿®é£ŸïŒPost-Translational Modifications, PTMsïŒ:
åæãããã¿ã³ãã¯è³ªã¯ã现èå ã§é©åã«ãã©ãŒã«ãã£ã³ã°ïŒæãããã¿ïŒãããå¿ èŠã«å¿ããŠPTMsïŒäŸïŒç³éä»å ããªã³é žåãã¡ãã«åïŒãè¡ãããŸããããã«ãããæ©èœçãªæåã圢æãããŸãã
3.3 æåæç€ºãšå ç«å¿çã®èªå°
MHCã¯ã©ã¹Içµè·¯:
现è質ã§åæãããæåããããããããã¢ãœãŒã ã«ãã£ãŠåè§£ãããMHCã¯ã©ã¹Iååã«çµåããŠçްè衚é¢ã«æç€ºãããŸããããã«ãããCD8+ ãã©ãŒT现èãèªèããææçŽ°èã®æé€ãè¡ãããŸãã
MHCã¯ã©ã¹IIçµè·¯:
倿¥ããåã蟌ãŸããæåããšã³ããœãŒã å ã§åŠçãããMHCã¯ã©ã¹IIååã«çµåããŠæåæç€ºçްèïŒAPCsïŒã®è¡šé¢ã«æç€ºãããŸããããã«ãããCD4+ ãã«ããŒT现èãæŽ»æ§åãããB现èã®æäœç£çãä»ã®å ç«çްèã®æŽ»æ§åãä¿é²ãããŸãã
ã¯ãã¹ãã¬ãŒã³ããŒã·ã§ã³:
äžéšã®æåæç€ºçްèïŒäŸïŒæš¹ç¶çްèïŒã¯ã现èå ã§åæãããæåãMHCã¯ã©ã¹IIçµè·¯ã ãã§ãªããMHCã¯ã©ã¹Içµè·¯ã«ãæç€ºããããšãã§ããŸããããã«ãããCD8+ T现èã®æŽ»æ§åãããã«ä¿é²ãããŸãã
4. mRNAã¯ã¯ãã³ã®è£œé ããã»ã¹ã®è©³çް
4.1 in vitro転åã®æé©å
ãã³ãã¬ãŒãDNAã®èšèš:
ãã©ã¹ããDNAãç·åœ¢ãã³ãã¬ãŒãã䜿çšããT7 RNAããªã¡ã©ãŒãŒããã¢ãŒã¿ãŒäžã§mRNAãåæããŸãã
ãã³ãã¬ãŒãDNAã®å質管çãéèŠã§ãããéºäŒåã®æ£ç¢ºæ§ã𿬠æã®ãªãå®å šæ§ãæ±ããããŸãã
åå¿æ¡ä»¶ã®æé©å:
åå¿æž©åºŠãã€ãªã³åŒ·åºŠãé µçŽ æ¿åºŠãªã©ãæé©åããé«åçãã€é«å質ãªmRNAã®åæãå®çŸããŸãã
æé転åé µçŽ ãRNaseé»å®³å€ã®äœ¿çšã«ãããmRNAã®åè§£ãé²ããŸãã
4.2 mRNAã®ç²Ÿè£œãšå質管ç
粟補æè¡ã®é«åºŠå:
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4.3 ãšã³ã«ãã»ã«åããã»ã¹ã®æé©å
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ã¹ãã€ã©ã«ãããŒæ³:
æµäœååŠçææ³ãçšããŠã¹ã±ãŒã©ãã«ãã€åçŸæ§ã®é«ãLNP補é ãå®çŸããŸããããç²åã®åäžæ§ãšé«ããšã³ã«ãã»ã«åå¹çãç¹åŸŽã§ãã
5. å ç«åŠçã¡ã«ããºã ã®æ·±å
5.1 å 倩æ§å ç«å¿çã®è©³çް
ãã¿ãŒã³èªèå容äœïŒPRRsïŒãšã®çžäºäœçš:
mRNAãLNPsã¯ãTLRïŒããŒã«æ§å容äœïŒãRIG-Iæ§å容äœïŒRLRsïŒãªã©ã®PRRsãšçµåããã€ã³ã¿ãŒãã§ãã³ããµã€ãã«ã€ã³ã®ç£çãèªå°ããŸãã
é©åãªååŠä¿®é£ŸïŒäŸïŒãã¯ã¬ãªã·ã修食ïŒã«ããããããã®å ç«åºæ¿ã調æŽãããéå°ãªççåå¿ãé²ããŸãã
NLRP3ã€ã³ãã©ããœãŒã ã®æŽ»æ§å:
äžéšã®LNPæåãNLRP3ã€ã³ãã©ããœãŒã ãæŽ»æ§åããççæ§ãµã€ãã«ã€ã³ã®ç£çãä¿é²ããããšããããŸãããããå ç«å¿çã®åŒ·åã«å¯äžããŸãããççéå€ãé²ãããã®ãã©ã³ã¹ãéèŠã§ãã
5.2 é©å¿å ç«å¿çã®è©³çް
T现èã®æŽ»æ§åãšåå:
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ãã©ãŒT现èïŒCD8+ïŒã¯ãMHCã¯ã©ã¹Iååã«æç€ºãããæåãããããèªèããææçŽ°èã®ã¢ãããŒã·ã¹ãèªå°ããŸãã
B现èã®æŽ»æ§åãšæäœç£ç:
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é·æçãªå ç«ä¿è·ã®ããã«ãèšæ¶B现èãšèšæ¶T现èã圢æãããŸãããããã®çްèã¯ãåæææã«è¿ éãã€åŒ·åãªå ç«å¿çãçºæ®ããŸãã
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6. 補é ããã»ã¹ã®ãã€ãªãšã³ãžãã¢ãªã³ã°çæé©å
6.1 çç£ã¹ã±ãŒã«ã®æ¡å€§
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é«å¯åºŠå¹é€æè¡ãçšããŠãmRNAã®å€§éçç£ãå®çŸããŸããçºé µæ¡ä»¶ãå¹é€åªäœã®æé©åãå¿ èŠã§ãã
èªååãããããã»ã¹ç®¡çã·ã¹ãã ã«ãããäžè²«ããå質ãšé«ãçç£å¹çãç¶æããŸãã
é£ç¶ããã»ã¹è£œé :
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6.2 ã¯ãªãŒã³ã«ãŒã æè¡ãšç¡è補é
ã¯ãªãŒã³ã«ãŒã ç°å¢ã®ç®¡ç:
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èªååãšãããã£ã¯ã¹ã®å°å ¥:
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7. èŠå¶ãšå質ä¿èšŒã®é«åºŠå
7.1 GMPïŒGood Manufacturing PracticeïŒã®éµå®
補é ããã»ã¹ã®æšæºå:
å補é ã¹ãããã«ãããŠãæšæºæäœæé ïŒSOPsïŒãå³å®ããäžè²«ãã補åå質ãç¶æããŸãã
ç¶ç¶çãªããã»ã¹æ€èšŒãšããªããŒã·ã§ã³ã宿œãã補é ããã»ã¹ã®å®å®æ§ãšåçŸæ§ãä¿èšŒããŸãã
å質管çã·ã¹ãã ã®çµ±å:
ã©ãã€ã³ãã©ããã£ã¯ã¹ãå質管çãœãããŠã§ã¢ãçšããŠãããŒã¿ã®è¿œè·¡æ§ãšç®¡çã匷åããŸããããã«ããã補é éçšã§ã®äžå ·åãéžè±ãè¿ éã«æ€åºã»ä¿®æ£ããŸãã
7.2 èŠå¶åœå±ãšã®é£æºãšæ¿èªããã»ã¹ã®æé©å
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ç·æ¥äœ¿çšèš±å¯ïŒEUAïŒãå éæ¿èªããã»ã¹ã掻çšããè¿ éãªåžå Žæå ¥ãå³ããŸãã
ãªã¢ã«ã¯ãŒã«ããšããã³ã¹ïŒRWEïŒã®æŽ»çš:
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8. mRNAã¯ã¯ãã³ã®å 端ç ç©¶ãšã€ãããŒã·ã§ã³
8.1 èªå·±å¢æ®åmRNAïŒReplicating mRNAïŒ
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8.2 çµã¿æãmRNAã¯ã¯ãã³ã®å€äŸ¡å
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8.3 çµç¹ç¹ç°çééãšçްèç¹ç°ççºçŸ
ãªã¬ã³ã修食LNPs:
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现èå ã¿ãŒã²ãã£ã³ã°:
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9. mRNAã¯ã¯ãã³ã®èšåºå¿çšãšæªæ¥å±æ
9.1 ææçäºé²ã®æ¡åŒµ
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9.2 ããå ç«çæ³ãžã®å¿çš
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å ç«ãã§ãã¯ãã€ã³ãé»å®³å€ãšã®äœµçš:
mRNAã¯ã¯ãã³ãšå ç«ãã§ãã¯ãã€ã³ãé»å®³å€ïŒäŸïŒPD-1ãCTLA-4é»å®³å€ïŒã䜵çšããããšã§ãT现èã®æŽ»æ§åãšè «çæå¶ã匷åããŸãã
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10. å«ççã»ç€ŸäŒç課é¡ã®æ·±åãšå¯Ÿå¿ç
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10.3 ç°å¢åœ±é¿ãšãµã¹ããããªãã£
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