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KELVIN G. HUAYLLAZO M. THE INTERFERONS AND THEIR RECEPTORS – DISTRIBUTION AND REGULATION

The interferons and their receptors – distribution and

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Page 1: The interferons and their receptors – distribution and

KELVIN G. HUAYLLAZO M.

THE INTERFERONS AND THEIR RECEPTORS

– DISTRIBUTION AND REGULATION

Page 2: The interferons and their receptors – distribution and

INTRODUCTION

The IFNs are cytokines which participate in several process of the immune system.

Isaacs (1957, INTERFERence influenza virus in its growning)They are 3 types descript:

IFN type I IFN type II Recently IFN type III has been described

Page 3: The interferons and their receptors – distribution and

JAK/STAT SIGNALING

• JAnus Kinase• Signal Transducers and

Activators of Transcription

• JAK (-1,-2.-3) y Tyk2• STAT (-1.-2.-3.-4.-5a/5b,

-6)• Heterodim, Homodim• SOCS (-1.-2,-3)• PIAS

Page 4: The interferons and their receptors – distribution and

INTERFERON RECEPTOR SYSTEMS

IFN type

IFNS Receptor

Signaling molecules

I α (13 types), β, δ (pigs), ε, κ, τ (ruminant), ω, ζ, ν

IFNAR1IFNAR2

JAK1, Tyk2 / STAT-1,-2,-3,-4,-5MAPK, PI3K, Akt, NF-κB, p53, PRMT1

II γ IFNGR1IFNGR2

JAK1, JAK2/ STAT-1,-2,-3,-5MAPK, PI3K, Akt, NF-κB

III λ IFNLR1IL10RB

JAK1, Tyk2/ STAT-1,-2,-3,-4,-5MAPK, PI3K, Akt

Page 5: The interferons and their receptors – distribution and

ESTRUCTURA, SÍNTESIS

VÍAS

IFN-α: pDCs, mono

IFN-β: FibroblastosEstímulos: RNA mc/bc CpG DNA viral Receptores TLR-3,-

7,-9Sensores iC (RIG-

1/MDA-5) IRF

IFN IFNR JAK/STAT IRF-9 ISRE–AN

STAT-1/STAT-1(P) GAS–AN

MAPKPI3K

TYPE I IFN

Page 6: The interferons and their receptors – distribution and

TYPE I IFN

ACCIONES BIOLÓGICAS Protección vs Inf. Virus

Enzimas PKR16 1’5’ OAS/Rnase L18,19

Señales: Paracrina/Autocrina ↑ MHC-I

CTL CD8+/NK x IL-12R? Th1 favorece expresión IL-12R Favorece secuestro de linfocitos en Gang Linf Inhibición In vitro de muchas células (Apoptosis, alt metabólica

enzimáticaUSOS IFN-α Hepatitis, NM Linfomas, Tricoleucemias IFN-β Esclerosis múltiple ?? ¿IL-10?

Page 7: The interferons and their receptors – distribution and

ESTRUCTURA, SÍNTESIS

VÍAS

Fuentes: M activo LB LT

IFN-γ MTbet1

Th1(+)/GATA3 Th2(-)

IFN IFNR JAK/STAT GAS

… STAT1/IRF-1

TYPE II IFN

Page 8: The interferons and their receptors – distribution and

TYPE II IFN

IFN-γ LB PC Switching IgG2aMHC-I, MHC-II, CoestimuladoresEndotelio TNF Potencia acciones (Adh Lt,

extravasación)Favorece las Rx InflamatoriasInhibe reacciones ricas en Eosinófilos IgEAgs tumoralesTranscripción phox-91 (complejo Oxidasa del M)Defensa contra L. donovani, major, Plasmodium

(resistencia contra esporozoitos)

Page 9: The interferons and their receptors – distribution and

TYPE III IFN

IFN-λ1 IFN-λ2IFN-λ3¿Ancestro IFN?TLR-8,-9JAK/STATHCV >>type I IFNsApoptosis no dep p53

MHC-I, 2’5’OAS, MxA

Page 10: The interferons and their receptors – distribution and

IFN & TISSUES

Page 11: The interferons and their receptors – distribution and

PATHWAYS OF IFN SIGNALING