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35 Cards in this Set
- Front
- Back
The microb. molecules that are the targets of innate immunity are sometimes called
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PAMPS - pathogen associated molecular patterns
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Adaptive immunity recognizes _____ but innate immunity is less easily tricked by microbes because it recognizes ____ _ __ _ _ __
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Antigens, functional forms of the microbes that they need to exist
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Are innate immune system receptors produced by somatic recombiination of genes or encoded in the germline?
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Encoded in the germline
***SO the specificity of the adaptive immunity is much more diverse than innate |
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What does the innate system recognize on molecules released by stressed or necrotic cells
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DAMPS - damage assoc. molecular patterns
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The two principal reactions of the innate immune system are __ and ___
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Inflammation and anti viral defense
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What innate receptor recognizes:
Bacterial Peptidoglycan, Lipoprotein, Lipotechoic acid |
TLR-1, -2, -6
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What innate receptor recognizes:
Gram NEGATIVE bacterial LPS, Fungal Mannans, Viral Envelope proteins |
TLR-4
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What innate receptor recognizes:
Bacterial Flagellan |
TLR-5
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What is TLR-2 specific for
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Bacterial Lipoglycans
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TLR-3, 7, and 8 is specific for
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Viral Nucleic Acids
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TLR-4 is specific for
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Bacterial LPS
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TLR-5 is specific for
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Bacterial Flagella
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TLR-9 is specific for
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unmethylated CG-rich oligonucleotides - more abundant in bacteria than mammallian cells
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TLR stimulates two important trancription factors - ____ - which promotes cytokine and endothetlial adhesion molecule expression
_____ - which stimulates production of type I interferons, n' cytoklines that block viral replication |
NF-kB, IRF-3
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Three ways the skin/epithelia protects from infection
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Physical Barrier
Killing of microbes by locally produced peptide antibiotics Killing of microbes and infected cells by Intraepithelial Lymphocytes |
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Two cytokines that act on endothelium at site of infection causing expression of E selectin and P selectin
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TNF, IL-1
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Circulating macrophages bind strongly/weakly to selectins and strongly/weakly to integrins
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Weakly to selectins, Strongly to integrins
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What enzyme in the phagolysosome converts oxygen into superoxide anion and free radicals?
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Phagocyte oxidase
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Inherited definciency of the phagocyte oxidase enzyme cuases the immunodeficiency dx ___
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Chronic Granulomatous Disease
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____ ____ cells recognize infected and stressed cells and respond by killin em, and secreting IFN-y
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NK cells
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Macrophages with ingested microbes secrete ____ which causes the NK cells to secrete ____ which leads to microbe destruction
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IL-12, IFN-y
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The NKG2D NK cell receptor recognizes molecules that resemble ____ __ _ _ _
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Class I MHC proteins
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NK cells are inhibited by SELF class I MHC molecules which are expressed on _______
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ALL healthy nucleated cells
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Three NK activating cytokines (IL's)
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IL-15 (important for NK cell develop. maturation)
IL-12, type I interferons (help NK cells murder others) |
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Three functions of the complement system
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Opsonization, Inflammation, Lysis of microbe
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Macrophages with ingested microbes secrete ____ which causes the NK cells to secrete ____ which leads to microbe destruction
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IL-12, IFN-y
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The NKG2D NK cell receptor recognizes molecules that resemble ____ __ _ _ _
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Class I MHC proteins
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NK cells are inhibited by SELF class I MHC molecules which are expressed on _______
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ALL healthy nucleated cells
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Three NK activating cytokines (IL's)
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IL-15 (important for NK cell develop. maturation)
IL-12, type I interferons (help NK cells murder others) |
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Three functions of the complement system
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Opsonization (C3b),
Inflammation (C3a, C5a) Lysis of microbe |
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Name the three cytokines involved in recruiting blood neutrophils and monocytes to site of infection
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TNF
IL-1 Chemokines |
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This cytokine promotes thrombus formation and reduces BP by reducing heart contractility and causing vascular leakiness
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TNF
-NOTE- Very high levels of TNF produced in response to severe bacterial infection can cause the early clinical presentation of SEPTIC SHOCK |
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What cytokine is considered a cytokine of both innate and adaptive immunity
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IFN-y
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What intracellular bacteria resists destruction inside phagocytes
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Listeria monocytogenes
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Org. resistant to phagocytosis
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Pneumococci
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