Kuthana ndi Mavuto mu Chithandizo cha CAR-T cha Khansa ya Magazi ya T-Cell

Chithandizo cha Chimeric Antigen Receptor T-cell (CAR-T) chakhala chithandizo chachikulu cha khansa ya m'magazi yochokera ku maselo a B, chomwe chimapereka mphamvu komanso chitetezo chambiri. Komabe, chimagwiritsidwa ntchito pa khansa ya m'maselo a T, monga T-cell acute lymphoblastic leukemia (T-ALL) ndi peripheral. T-Cell Lymphoma (PTCL), imabweretsa mavuto akulu. Chimodzi mwa zovuta zazikulu chili pakufanana pakati pa maselo a T oopsa ndi maselo a T abwinobwino, zomwe zimapangitsa kuti zikhale zovuta kulunjika maselo a khansa okha popanda kuwononga maselo a T athanzi. Izi zimapangitsa kuti pakhale vuto lotchedwa "fratricide," pomwe maselo a CAR-T amaukira maselo a T oopsa komanso abwinobwino, zomwe zimalepheretsa kwambiri kugwira ntchito kwa chithandizocho. Kuphatikiza apo, kusiyana kwa matenda a khansa a T-cell kumavuta kuzindikira malo omwe maselo a CAR-T onse amakumana nawo, chifukwa antigen imodzi yokha singathe kufotokozedwa mofanana m'maselo onse a khansa.

Mu mayeso azachipatala, maselo a CAR-T omwe amalimbana ndi ma antigen a pan-T monga CD5 ndi CD7 awonetsa kupambana pang'ono pochiza khansa ya T-cell. Zolinga izi zimapezeka pamwamba pa khansa ya T-cell yambiri, koma zimawonekeranso pa maselo abwinobwino a T, zomwe zimapangitsa kuti pakhale zotsatirapo zoyipa monga kuchepa kwa maselo a T, kusowa kwa chitetezo chamthupi, komanso kuwonjezeka kwa chiopsezo cha matenda. Pofuna kuchepetsa mavutowa, ofufuza akuyang'ana kwambiri ma antigen a T-cell "oletsedwa", monga CD4, CD30, CD37, ndi CCR4. Ma antigen awa amasankha kwambiri magulu ena a maselo a T, zomwe zitha kuchepetsa chiopsezo cha fratricide ndikusunga chitetezo chamthupi chathupi. Komabe, kafukufuku wa ma antigen oletsedwa awa akadali koyambirira, ndipo kusankha mosamala odwala ndikofunikira kuti adziwe cholinga choyenera kwambiri pamilandu iliyonse.

Njira ina yomwe ikufufuzidwa ikuphatikizapo kupanga maselo a CAR-T a allogeneic, omwe amachokera kwa opereka athanzi osati kwa odwala okha. Maselo a CAR-T a allogeneic amatha kusinthidwa majini kuti apewe kuipitsidwa kwa chotupa ndikuchepetsa chiopsezo cha matenda a graft-versus-host (GvHD), vuto lofala kwambiri m'malo oikamo. Komabe, maselowa amakumana ndi zovuta monga kukana chitetezo chamthupi, zomwe zingachepetse kugwira ntchito kwawo kwa nthawi yayitali. Pofuna kuthana ndi izi, njira zosintha majini monga CRISPR/Cas9 ndi base editing zikufufuzidwa kuti zisinthe maselo a CAR-T, zomwe zimapangitsa kuti azigwiritsidwa ntchito kwambiri komanso otetezeka kwa odwala. Base editing, makamaka, imapereka njira ina yabwino yosinthira majini achikhalidwe, chifukwa imapewa zoopsa zokhudzana ndi kusweka kwa DNA kwa mizere iwiri, kuchepetsa poizoni wa majini ndikukweza chitetezo cha mankhwala a CAR-T.

Ngakhale kuti pali kupita patsogolo kumeneku, pali mavuto angapo omwe adakalipo. Maselo a CAR-T nthawi zambiri satha kukhalabe ndi moyo kwa nthawi yayitali m'thupi, zomwe zingayambitse kubwereranso kwa matenda. Mwachitsanzo, pambuyo polandira chithandizo ndi maselo a CAR-T omwe ali ndi CD7, maselo a T-negative CD7 amatha kutuluka ndikukana kuphedwa kwa maselo a CAR-T, zomwe zimapangitsa kuti chithandizocho chikhale chovuta kwambiri. Ofufuza akufufuza njira zowonjezerera moyo wautali komanso wogwira ntchito bwino wa maselo a CAR-T, kuphatikizapo kuphatikiza chithandizo cha CAR-T ndi mankhwala ena, monga kusamutsa maselo oyambira, kuti alimbikitse ndikusunga chikhululukiro. Njira iyi, yomwe imadziwika kuti "bridging therapy," ingapereke chitetezo china kuti asabwererenso, makamaka kwa odwala omwe ali ndi chotupa chochuluka.

Mavuto omwe amabwera chifukwa cha chithandizo cha CAR-T, kuphatikizapo cytokine release syndrome (CRS), immune effector cell-associated neurotoxicity syndrome (ICANS), ndi matenda opatsirana, nawonso ndi zinthu zomwe zimadetsa nkhawa. Kuchepa kwa maselo a T, makamaka, kumasiya odwala pachiwopsezo chobwezeretsanso matenda obisika monga kachilombo ka Epstein-Barr (EBV) ndi cytomegalovirus (CMV), pomwe kupsinjika kwa mafupa kumatha kuyambitsa cytopenia yayitali. Pofuna kuchepetsa zoopsazi, ofufuza akufufuza njira zowongolera chitetezo ndi magwiridwe antchito a maselo a CAR-T, monga kuyambitsa kusintha kwa chitetezo ndikugwiritsa ntchito njira zazifupi zochizira kuti achepetse zotsatira zoyipa.

Ponseponse, ngakhale chithandizo cha CAR-T chapita patsogolo kwambiri pochiza khansa ya m'magazi ya T-cell, mavuto okhudzana ndi kulunjika kwa ma antigen, zovuta za chitetezo chamthupi, komanso kupirira kwa nthawi yayitali akadalipo. Kafukufuku wopitilira ndi zatsopano muukadaulo wa CAR-T, kuphatikizapo kupanga njira zochiritsira ziwiri, njira zosintha majini, ndi kusankha odwala molondola, ndizofunikira kwambiri kuti titsegule kuthekera kwakukulu kwa chithandizo cha CAR-T pochiza khansa ya T-cell. Pamene mayesero azachipatala akupitiliza kufufuza njira zatsopano, chiyembekezo ndichakuti chithandizo cha CAR-T chidzasintha kuti chipereke njira zochiritsira zolimba komanso zotetezeka kwa odwala omwe ali ndi khansa yovutayi.