Video: Cov cell twg paub txog antigens uas tau Phagocytized los ntawm antigen nthuav tawm ntawm tes?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
ANTIGEN-presentING CELLS
| Dendritic hlwb | |
|---|---|
| Kev tiv thaiv kab mob | Tsis muaj kev tiv thaiv |
| Tshwj xeeb antigen cov receptors | Tsis muaj |
| Qhov chaw | Cov tawv nqaij thiab mucosal epithelium (Langerhans hlwb ), cov ntaub so ntswg lymphoid, cov ntaub so ntswg sib txuas |
| Antigen hom | Intracellular antigens thiab extracellular antigens |
Yog li ntawd, dab tsi yog cov antigen nthuav cov hlwb?
Txhais. Antigen - nthuav tawm cov cell (APCs) yog pab pawg sib txawv ntawm kev tiv thaiv kab mob hlwb uas nruab nrab cellular kev tiv thaiv kab mob los ntawm kev ua thiab qhia antigens rau kev lees paub los ntawm qee yam lymphocytes xws li T hlwb . Classical APCs suav nrog dendritic hlwb , macrophages, Langerhans hlwb thiab B. hlwb.
Qhov thib ob, leej twg ntawm cov hlwb hauv qab no tuaj yeem ua haujlwm li antigen nthuav tawm cov hlwb APCs? NTUJ - QHOV TSEEB CELLS Cov kws tshaj lij APCs suav nrog dendritic hlwb , macrophages, thiab B. hlwb , hos nonprofessional APCs tias muaj nuj nqi nyob rau hauv kev nthuav qhia antigen tsuas yog lub sijhawm luv luv suav nrog thymic epithelial hlwb thiab vascular endothelial hlwb.
Ntawm no, qhov twg antigen nthuav tawm cov hlwb los ntawm?
Lawv yog pom nyob rau hauv ntau hom ntaub so ntswg. Cov kws tshaj lij antigen - nthuav tawm cov cell , suav nrog macrophages, B hlwb thiab dendritic hlwb , nthuav tawm txawv teb chaws antigens rau pab T hlwb , thaum kis tus kab mob hlwb (lossis mob qog noj ntshav hlwb ) ua tau tam sim no antigens pib hauv lub cell rau cytotoxic T. hlwb.
T cells paub txog antigens li cas?
T hlwb paub txog antigens nrog lawv antigen receptor, ib tug complex ntawm ob protein chains ntawm lawv nto. Lawv ua tsis paub tus kheej antigens , txawm li cas los xij, tab sis tsuas yog ua tiav antigen nthuav tawm ntawm lawv qhov chaw hauv qhov zawj zawj ntawm qhov loj histocompatibility complex molecule.
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