Kukunda Matambudziko muCAR-T Therapy yeT-Cell Blood Cancers
Kurapa kweChimeric Antigen Receptor T-cell (CAR-T) kwaratidza kuva mushonga unoshamisa wezvirwere zveropa zvinobva kuB-cell, zvichipa kushanda kwakanaka uye kuchengetedzeka. Zvisinei, kushandiswa kwayo muzvirwere zveT-cell, zvakaita seT-cell acute lymphoblastic leukemia (T-ALL) uye peripheral T-Cell Lymphoma (PTCL), ine matambudziko makuru. Chimwe chezvinetso zvikuru chiri mukufanana kuripo pakati pemasero eT-cell ane njodzi nemasero eT-cell akajairika, zvichiita kuti zvive zvakaoma kurwisa masero ane kenza chete pasina kukuvadza masero eT-cell ane hutano. Izvi zvinoguma nechiitiko chinozivikanwa se "fratricide," apo masero eCAR-T anorwisa masero eT-cell ane njodzi neakajairika, zvichideredza zvakanyanya kushanda kwekurapa. Uyezve, kusiyana kwezvirwere zveT-cell kunoomesa kuzivikanwa kwemasero eCAR-T anowanikwa, sezvo antigen imwe chete inogona kusaratidzwa zvakaenzana mumasero ese ekenza.
Mumiedzo yekiriniki, masero eCAR-T anotarisa maantigen epan-T akadai seCD5 neCD7 akaratidza kubudirira mukurapa kenza yeT-cell. Matambudziko aya anowanikwa pamusoro pekenza yeT-cell yakawanda, asi anoonekwawo pamasero eT-cell akajairwa, zvichikonzera migumisiro yakaipa yakadai sekupera kwemasero eT, kushomeka kwemasoja ekudzivirira muviri, uye kuwedzera kwekutapukirwa nezvirwere. Kuti vaderedze matambudziko aya, vaongorori vari kutarisa pane maantigen eT-cell "akaganhurirwa", akadai seCD4, CD30, CD37, uye CCR4. Maantigen aya anosarudza zvakanyanya kune mamwe maT-cell, izvo zvinogona kuderedza njodzi yefratricide uye kuchengetedza mashandiro emuviri akajairika. Zvisinei, tsvakiridzo yemaantigen aya akaganhurirwa ichiri mumatanho ekutanga, uye kusarudzwa kwevarwere nokungwarira kwakakosha kuti vaone chinangwa chakakodzera kune imwe neimwe nyaya.
Imwe nzira iri kutsvagwa inosanganisira kugadzirwa kwemasero eCAR-T allogeneic, ayo anobva kune vanopa vane hutano kwete kuvarwere pachavo. Masero eCAR-T allogeneic anogona kugadziriswa majini kudzivirira kusvibiswa kwebundu uye kuderedza njodzi yechirwere chegraft-versus-host (GvHD), dambudziko rinowanzoitika munzvimbo dzekuisirwa magene. Zvisinei, masero aya anosangana nematambudziko akadai sekuramba immune system, izvo zvinogona kudzikisira kushanda kwawo kwenguva refu. Kuti agadzirise izvi, matekiniki ekugadzirisa majini akadai seCRISPR/Cas9 uye base editing ari kuongororwa kuti agadzirise masero eCAR-T, zvichiita kuti ashande zvakanyanya uye akachengeteka kuvarwere. Base editing, kunyanya, inopa imwe nzira inovimbisa pane tsika dzekugadzirisa majini, sezvo ichidzivirira njodzi dzine chekuita nekuputsika kweDNA kaviri, kuderedza chepfu yemajini uye kuvandudza kuchengetedzeka kwemishonga yeCAR-T.
Pasinei nekufambira mberi uku, matambudziko akati wandei achiripo. Masero eCAR-T haawanzo kwanisa kuramba aripo kwenguva refu mumuviri, izvo zvinogona kukonzera kudzokera shure kwechirwere. Mushure mekurapwa nemasero eCAR-T anotarirwa neCD7, semuenzaniso, masero eT-CD7-negative anogona kubuda uye kuramba kuuraya masero eCAR-T, zvichiwedzera kuoma kurapwa. Vaongorori vari kutsvaga nzira dzekuvandudza hupenyu hurefu uye kushanda kwemasero eCAR-T, kusanganisira kusanganisa kurapa kweCAR-T nedzimwe nzira dzekurapa, dzakadai sekuisirwa masero ekutanga, kusimbisa nekuchengetedza kurerukirwa. Maitiro aya, anozivikanwa se "bridging therapy," anogona kupa imwe nzira yekudzivirira kubva pakudzokera shure, kunyanya kune varwere vane mutoro wakawanda webundu.
Matambudziko anotevera kurapwa neCAR-T, anosanganisira cytokine release syndrome (CRS), immune effector cell-associated neurotoxicity syndrome (ICANS), uye opportunistic infections, zvimwe zvezvinhu zvinonetsawo. Kudzikira kweT-cell, kunyanya, kunoita kuti varwere vave panjodzi yekudzoserwa kwezvirwere zvakaita seEpstein-Barr virus (EBV) necytomegalovirus (CMV), nepo kudzvinyirirwa kwebone marrow kuchigona kutungamira ku cytopenia kwenguva refu. Kuti vaderedze njodzi idzi, vaongorori vari kutsvaga nzira dzekuvandudza kuchengetedzeka uye kushanda zvakanaka kweCAR-T cells, zvakaita sekuisa safety switches uye kushandisa nzira pfupi dzekurapa kuderedza migumisiro yakaipa.
Zvose izvi, kunyange hazvo kurapwa neCAR-T kwafambira mberi zvikuru mukurapa kenza yeropa yeT-cell, matambudziko ane chekuita nekurwisa maantigen, matambudziko ekudzivirira muviri, uye kugara kwenguva refu achiripo. Kutsvagurudza nekuvandudza tekinoroji yeCAR-T, kusanganisira kuvandudzwa kwemishonga inorwisa mabhakitiriya maviri, matekiniki ekugadzirisa majini, uye kusarudzwa kwevarwere kwakanyatsojeka, zvakakosha pakuvhura mukana wekurapa kweCAR-T mukurapa kenza yeT-cell. Sezvo miedzo yekiriniki ichiramba ichiongorora nzira itsva, tariro ndeyekuti kurapwa neCAR-T kuchashanduka kuti kupe nzira dzekurapa dzakasimba uye dzakachengeteka kune varwere vane kenza idzi dzakaoma.