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Video: Dab tsi ua rau exogenous antigen?
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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.
Ib yam li ntawd ib tug yuav nug, qhov twg cov antigens tuaj ntawm?
Txawv teb chaws antigens los ntawm sab nraum lub cev. Piv txwv suav nrog cov khoom lossis cov khoom tsim los ntawm cov kab mob lossis cov kab mob (xws li cov kab mob thiab cov protozoa), nrog rau cov khoom hauv nab venom, qee cov proteins hauv cov zaub mov, thiab cov khoom ntawm cov ntshav thiab cov qe ntshav liab los ntawm lwm tus neeg.
Qhov thib ob, ua li cas exogenous antigens ua tiav? Cov exogenous txoj kev yog siv tshwj xeeb antigen -nthuav tawm cov cell los nthuav qhia peptides muab los ntawm cov protein uas lub cell muaj endocytosed. Cov peptides tau nthuav tawm ntawm MHC chav kawm II cov qauv. Cov protein yog endocytosed thiab degraded los ntawm cov kua qaub-tiv thaiv proteases hauv endosomes; qhov no txheej txheem yuav siv li ib teev.
Kuj paub, dab tsi yog endogenous thiab exogenous antigens?
Ib antigen yog ib qho molecule uas pib tsim cov tshuaj tiv thaiv kab mob thiab ua rau muaj kev tiv thaiv kab mob. Antigens feem ntau yog cov protein, peptides, lossis polysaccharides. Antigens raug cais raws li exogenous (nkag los sab nraud) endogenous (tsim nyob rau hauv lub hlwb), autoantigen, qog antigen , los yog ib haiv neeg antigen.
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:
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Amenorrhea cov lus tseeb Genetic los yog yug hauv tsev yog qhov ua rau pom thawj zaug ntawm tus mob amenorrhea. Amenorrhea tuaj yeem tshwm sim los ntawm kev ua haujlwm tsis zoo ntawm zes qe menyuam, pituitary caj pas, hypothalamus, lossis lub tsev menyuam. Kev qoj ib ce hnyav, hnyav hnyav, mob lub cev, thiab kev nyuab siab tuaj yeem ua rau muaj kev tsis txaus ntseeg
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Zoo li feem ntau qhov kev kho mob ib txwm muaj txiaj ntsig thiab ntau yam, lub ntsiab lus tuaj yeem sib txawv me ntsis, tab sis feem ntau cov ntsiab lus hauv qab no siv: Ua rau me me hypoxemia: PaO2 = 60 txog 79 mmHg. Qhov nruab nrab hypoxemia: PaO2 = 40 txog 59 mmHg. Hypoxemia hnyav: PaO2 <40 mmHg
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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
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Dab tsi yog exogenous antigens?
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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