Video: Dab tsi yog exogenous antigens?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Exogenous antigens cov yog antigens uas tau nkag mus rau hauv lub cev los ntawm sab nraud, piv txwv li, nqus pa, nqus los yog txhaj tshuaj. Los ntawm endocytosis los yog phagocytosis, exogenous antigens ntawm lub cev raug coj mus rau hauv antigen - nthuav tawm cov hlwb (APCs) thiab ua tiav rau hauv cov khoom tawg.
Dhau li ntawm no, qhov txawv ntawm endogenous thiab exogenous antigens yog dab tsi?
Cov sib txawv yog tias peptides yog los ntawm txawv qhov chaw – endogenous , lossis intracellular, rau MHC chav kawm I; thiab exogenous , lossis ntxiv rau MHC chav kawm II. Endogenous antigens cov kuj tseem tuaj yeem nthuav qhia los ntawm MHC chav kawm II thaum lawv poob qis los ntawm autophagy.
Qhov thib ob, dab tsi ua rau exogenous antigen? Cov exogenous txoj hauv kev tshwm sim thaum MHC chav kawm II cov lwg me me nthuav tawm cov khoom tawg los ntawm extracellular ( exogenous ) cov proteins uas nyob hauv lub cell. Ua ntej, cov kab mob yog phagocytized, ces endosomes nyob rau hauv lub cell tawg antigens nrog proteases, uas tom qab ntawd ua ke nrog MHC II.
Tom qab, lo lus nug yog, dab tsi yog exogenous antigen ua?
Txhais: The txheej txheem ku ib antigen - nthuav tawm cell nthuav qhia peptide antigen ntawm exogenous keeb kwm ntawm nws cov cell nto nyob rau hauv koom nrog ib MHC qib II protein complex. Cov peptide antigen feem ntau, tab sis tsis tas li, ua tiav los ntawm tag nrho cov protein.
Dab tsi yog qhov piv txwv ntawm endogenous antigen?
Endogenous antigens cov yog antigens pom nyob rau hauv cytosol ntawm tib neeg lub hlwb xws li cov kab mob kis kab mob, cov proteins los ntawm cov kab mob intracellular, thiab qog. antigens . Exogenous antigens yog antigens uas nkag los ntawm sab nraud lub cev, xws li kab mob, fungi, protozoa, thiab cov kab mob dawb.
Pom zoo:
Antigens thiab tshuaj tiv thaiv kab mob yog dab tsi?
Antigens yog cov lwg me me muaj peev xwm txhawb kev tiv thaiv kab mob. Txhua tus antigen muaj cov yam ntxwv sib txawv, lossis epitopes, ua rau muaj cov lus teb tshwj xeeb. Cov tshuaj tiv thaiv kab mob (immunoglobins) yog cov protein zoo li Y tsim los ntawm B hlwb ntawm lub cev tiv thaiv kab mob hauv kev teb rau kis rau antigens
Dab tsi yog antigens nyob rau hauv cov ntshav?
Ob qhov antigens yog antigen A thiab antigen B. Ob qhov tshuaj tiv thaiv yog antibody A thiab antibody B. Cov antigens muaj nyob ntawm cov qe ntshav liab thiab cov tshuaj tiv thaiv hauv cov ntshav
Dab tsi ua rau exogenous antigen?
Exogenous antigens yog antigens uas tau nkag mus rau hauv lub cev los ntawm sab nraud, piv txwv li, los ntawm kev nqus pa, nqus los yog txhaj tshuaj. Los ntawm endocytosis los yog phagocytosis, exogenous antigens raug coj mus rau hauv cov antigen-presenting cells (APCs) thiab ua tiav rau hauv cov khoom tawg
Dab tsi yog txhais los ntawm cov yam ntxwv exogenous?
Ib qho exogenous yam yog ib yam khoom uas muaj tam sim no thiab nquag nyob rau hauv ib tug tib neeg kab mob los yog nyob rau hauv lub cell, tiam sis uas originated sab nraum cov kab mob, as opposed to ib endogenous yam. Cov txheej txheem exogenous hauv tshuaj suav nrog ob qho kab mob thiab kev kho mob
HIV antigens yog dab tsi?
Ib qho antigen yog ib feem ntawm tus kab mob uas ua rau lub cev tiv thaiv kab mob. Yog tias koj tau kis tus kab mob HIV, antigens yuav tshwm sim hauv koj cov ntshav ua ntej cov tshuaj tiv thaiv kab mob HIV raug tsim. Qhov kev kuaj no feem ntau tuaj yeem pom HIV hauv 2-6 lub lis piam tom qab kis kab mob. Cov tshuaj tiv thaiv kab mob HIV / tshuaj tiv thaiv kab mob yog ib hom kev kuaj HIV ntau tshaj plaws