Video: Dab tsi yog graft rejection?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Tsis kam lees yog ib qho kev puas tsuaj ntawm cov ntaub so ntswg los yog cov kab mob hauv nruab nrog cev ntawm ob tug tswv cuab los yog hom kab mob sib txawv ntawm qhov loj histocompatibility complex rau cov hom (piv txwv li, HLA hauv txiv neej thiab H-2 hauv nas).
Tsis tas li ntawd, dab tsi ua rau graft rejection?
Hloov tsis lees txais tshwm sim thaum hloov cov ntaub so ntswg tsis lees paub los ntawm tus neeg tau txais kev tiv thaiv kab mob, uas rhuav tshem cov ntaub so ntswg. Kev hloov pauv tuaj yeem txo qis los ntawm kev txiav txim siab qhov sib piv ntawm cov khoom pub thiab tus neeg txais thiab los ntawm kev siv tshuaj tiv thaiv kab mob tom qab hloov.
Ib yam nkaus, puas yog lub cim xeeb lub luag haujlwm rau kev tsis lees txais cov ntaub so ntswg? Vim tias lawv lub peev xwm los tsim cov tshuaj tiv thaiv kev tiv thaiv sai sai thaum rov ua dua tshiab, nco T hlwb zoo nkaus li muaj txiaj ntsig tshwj xeeb ntawm kev kho kom haum xeeb allograft tsis lees paub . Tsis tas li ntawd, nco T hlwb tsawg rhiab tshaj li naïve T hlwb rau ntau lub tswv yim tiv thaiv kab mob.
Kuj Paub, hom kev tiv thaiv twg yog lub luag haujlwm rau kev tsis lees paub kev dag?
Mechanisms ntawm kev tsis lees paub. Lub cev tiv thaiv kab mob rau lub cev hloov pauv muaj xws li cellular (lymphocyte mediated) thiab humoral (antibody mediated) mechanisms. Txawm hais tias lwm hom cell kuj tseem koom nrog, tus T hlwb yog qhov tseem ceeb hauv kev tsis lees paub cov duab.
Yuav ua li cas thaum hloov pauv tsis raug?
“ Tsis lees paub ” yog ib lo lus txaus ntshai heev, tab sis nws tsis txhais hais tias koj poob koj hloov pauv cev. Tsis lees paub yog thaum tus neeg tau txais lub cev lub cev tiv thaiv kab mob lees paub tus neeg pub khoom nruab nrog cev raws li txawv teb chaws thiab sim tshem tawm nws. Nws feem ntau tshwm sim thaum koj lub cev tiv thaiv kab mob pom tej yam xws li kab mob los yog kab mob.
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