V17 Flashcards

1
Q

Autoimmunität Faktoren die die einflussen können

A
  • Genen
  • immunregulation
  • Umgebung
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2
Q

Autoimmunkrankheit

A
  • Psoriasis
  • Thyreoiditis
  • SLE
  • multiple sklerose
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3
Q

Ebenen der Selbst-Toleranz: Art der Toleranz

A
  • zentrale Toleranz
  • Antigensegregation
  • periphere Anergie
  • regulatorische T-Zellen
  • funktionelle Abweichung
  • durch Aktivierung induzierter Zelltod
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4
Q

Zentrale Toleranz wie in Tymus?

A

AIRE-gene von jede Gewebe sollen in Tymus explimiert werden, um eine Negative toleranz zu prüfen

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5
Q

regulatorische Toleranz

A
  • T-Zelle (in Thymus) die Autoantigen erkennt wird zu Treg-Zelle
  • T-Zelle (in Peripherie) die Autoantigen erkennt und TGF-beta gibt wird zu eine induzierte Treg-Zelle
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6
Q

Treg wie reguliert andere Zellen?

A

die Produziert IL-10 und TGF-beta um andere T-zelle zu hemmen

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7
Q

Breaking tolerance after infection – positive feedback loops develop in the wrong (autoimmune) direction

A
Immune response to infection
collateral damage of tissue – release of antigens (otherwise sequestered)
pro-inflammatory cytokine milieu
cross-reactive T cells and antibodies
epitope spreading (new epitopes)
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8
Q

apoptosis:

A

„eat me and forget me“

programmierten Zelltods, kontrollierte Prozess

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9
Q

necrosis:

A

„eat me and run“
örtlicher Gewebstod, Absterben von Zellen, Gewebs- oder Organbezirken als pathologische Reaktion auf bestimmte Einwirkungen

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10
Q

Autoantikörper syndrome

A
  • myasthenia gravis
  • graves´disease
  • Typ 2 Diabetes
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11
Q

Autoimmune Krankheiten

A
  • Myasthenia gravis -Autoantibody: Anti-acetylcholine receptor
  • Graves´disease - Autoantibody: Anti-thyroid-stimulating-hormone receptor
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12
Q

Genetic defects in Autoimmunity

A

-überexpretion
-unterexpretion
von Cytokine oder intrazellulär Signal

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13
Q

Genetic defects in Autoimmunity Gene

A
  • AIRE
  • CTLA4
  • FOXP3
  • FAS
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14
Q

Alloreactivity is induced by

A
  • priming in lymph nodes

- direct and indirect recognition of allo MHC

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