Cellule T e B Cellule dendritiche e Macrofagi come Antigen ...
Transcript of Cellule T e B Cellule dendritiche e Macrofagi come Antigen ...
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Cellule T e B Cellule dendritiche e Macrofagi come
Antigen Presenting Cells (APC)
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Proprietà della risposta adattativa a confronto con la risposta innata
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Immunità adattativa : Umorale e Cellulo-mediata Abbas, Lichtman, Pillai. Cellular and Molecular Immunology. 8 Ed. Elsevier
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I linfociti B e T riconoscono
l’antigene con modalità diverse
I linfociti B riconoscono l’antigene in forma nativa e lo captano direttamente dall’ambiente esterno
I linfociti T non sono in grado di «vedere» l’antigene libero nell’ambiente (come i B) ma
soltanto associato a molecole MHC self
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Ipotesi della selezione clonale
Antigen Y Antigen Z
Tessuti linfoidi secondari
Tessuti linfoidi primari
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Ab
bas, Lich
tman
, Pillai. C
ellu
lar and
Mo
lecu
lar Im
mu
no
logy. 8
Ed. Elsevie
r
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Occorre un doppio segnale affinchè la risposta adattativa sia innescata
Ab
bas, Lich
tman
, Pillai. C
ellu
lar and
Mo
lecu
lar Im
mu
no
logy. 8
Ed. Elsevie
r
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«Nascita» e maturazione dei linfociti B e T
Ab
bas, Lich
tman
, Pillai. C
ellu
lar and
Mo
lecu
lar Im
mu
no
logy. 8
Ed. Elsevie
r
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Attivazione dei linfociti T e B
Abbas, Lichtman, Pillai. Cellular and Molecular Immunology. 8 Ed. Elsevier
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