T-cel activatie Flashcards

1
Q

3 signalen waardoor T-cellen geactiveerd worden

A
  • TCR signaal; antigen gepresenteerd door MHC
    complex
  • costimulatorische interactie
  • cytokine signaling; paracrien & autocrien (IL-2)
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2
Q

welke co-stimulatorische receptoren

A
  • CD28 R, bindt CD80/86 ligand op APC’s; activatie van naïeve T-cellen
  • ICOS, bindt ICOS L op B-cellen, APC’s en T-cellen; onderhoud act van gedifferentieerde T-cellen en helpt bij T/B collaberatie
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3
Q

welke co-inhiberende receptoren

A
  • CTLA-4, bindt CD80/86 (100x meer aff dan CD28); reduceert inflammatie
  • PD-1 (programmed cell death), bindt PD-L op APCs en tumorcellen; regulatie van Treg cel differentiatie
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4
Q

Th1 cel

A
  • polarizerende cytokines; IL-12, IFN-gamma, IL-
    18
  • transcriptionele regulator; T-Bet
  • effector cytokines; TFN-gamma, TNF
  • activeren van macrofagen,

weefsel inflammatie

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5
Q

Th2 cel

A
  • polarizerende cytokines; IL-4
  • transcriptionele regulator; GATA3
  • effector cytokines; IL-4, IL-5,IL-13
  • bestrijden wormen, activeren eosinofielen

allergie

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6
Q

Th17 cel

A
  • polarizerende cytokines; IL-6, IL-23, TGF-beta
  • transcriptionele regulator; RORgamat
  • effector cytokines; IL-17A/F, IL-22
  • bestrijden extracellulaire pathogenen (bact)
  • auto-immuniteits weefselinflammatie
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7
Q

Th22 cel

A
  • polarizerende cytokines; IL-6, TNF-alfa
  • transcriptionele regulator; AHR
  • effector cytokines; IL-22
  • bestrijden extracellulaire pathogenen in de
    huid
  • inflammatie van huidziektes
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8
Q

Treg cel

A
  • polarizerende cytokines; IL-2, TGF-beta
  • transcriptionele regulator; FocP3
  • effector cytokines; IL-10, TGF-beta
  • onderdrukken imuunrespons
  • inhibeert antitumor respons
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