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Immunology Study Guide
Exam 1
58
Immunology
Graduate
10/23/2012

Additional Immunology Flashcards

 


 

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Term
Bonds between antigen and antibody
Definition
multiple and non-covalent
Term
hapten
Definition
a small molecule that can elicit an immune response only when attached to a large carrier such as a protein; the carrier may be one that also does not elicit an immune response by itself
Term
adjuvent
Definition
an agent that may stimulate the immune system and increase the response to a vaccine, without having any specific antigenic effect in itself
Term
What types of cells are directly involved in eradicating the virally infected cells?
Definition
Cytotoxic T cells and Natural Killer cells
Term
T cell Markers (no co-receptors or co-stimulatory)
Definition
TCR, CD4 OR CD8
Term
B cell Markers ( no co-receptors no co-stimulatory)
Definition
IgM/IgD, CR, FcR, MHC Class II, CD20
Term
T cell co-receptors
Definition
CD3
Term
B cell co-receptors
Definition
CD21, CD19, CD81
Term
Costimulatory molecules
Definition
CD28 (binds to CD80 or B7.1)
CTLA 4 (binds to CD80/CD86)
CD40 (on B cells and dendritic cells)
CD40L (on T cells and B cells)
Term
Ig Molecule, heavy chain desginations: Greek vs. English
Definition
IgA = alpha, α
IgD = delta, δ
IgE = epsilon, ε
IgG = gamma, γ
IgM = mu, μ
Light chains are kappa (κ) or lambda (λ)
Term
In NK cells, the cytotoxic granule formation is constitutive or inflammation-induced?
Definition
constitutive
Term
Antibody-dependent cellular cytotoxicity (ADCC)
Definition
Fc (gamma) receptor on NK cells bind to IgG on pathogen and induce degranulation which kills pathogen
Term
Fab region
Definition
antigen-binding fragment. The actual portions of an antibody molecule that have a shape corresponding to that of an epitope of an antigen. The amino acid sequences of the Fab region are hypervariable.
Term
Fc region
Definition
constant fragment. The portion of an antibody molecule, which carries out the biological activities of that class of antibody. The amino acid sequence of the Fc portion of an antibody is the same for every antibody in that class
Term
Fc Receptors
Definition
The Fc receptors bind to antibodies that are attached to the infected cell and stimulate macrophages when they attach. When immunoglobulin is attached, it plays the role of a ligand. In ADCC FcγR receptors on the surface of natural killer (NK) cells stimulate the NK cells to release cytotoxic molecules from their granules to kill antibody-covered target cells.
Term
Th-1 Immune response
Definition
Th-1 produces INF gamma which activates macrophages and B cells to secrerte opsonization antibodies to coat the intracellular bacteria in cellular immunity
Term
Th-2 Immune response
Definition
Th-2 produces IL-4 which activates B cells to secrete antibodies and neutralize the extracellular pathogenin humoral immunity
Term
Primary response
Definition
the response the occurs the first time a harmful antigen is encountered
Term
secondary resposne
Definition
is a much quicker and more effective response to an already encoutered antigen
Term
antibody produced during primary response
Definition
IgM
Term
antibody produced during secondary response
Definition
IgG
Term
Beginning stages of Primary response
Definition
there are no antigen-specific antibodies, because the immune response is based on general phagocytosis of the pathogen and inflammation
Term
Late stages of primary response
Definition
after antibody specific (Adaptive) immunity recognizes the pathogen and mounts a respone, those antibodies stay around and provide protection against infection
Term
beginning stages of secondary response
Definition
antibody specific (Adaptive) immunity recognizes the pathogen and mounts a respone, those antibodies stay around and provide protection against infection
Term
late stages of secondary response
Definition
pathogens are eliminated through combined actions of specific antibody and innate immunity
Term
MHC class I isotypes
Definition
HLA-A, HLA-B, HLA-C, HLA-E, HLA-F & HLA-G
Term
MHC class II istypes
Definition
HLA-DM, HLA-DO, HLA-DP, HLA-DQ, HLA-DR
Term
MHC class I structure
Definition
• Made up of one membrane bound α chain, and a noncovalently bonded β2 microgloulin. The heavy chain has three domain, two of which form the peptide binding site.
Term
MHC class II structure
Definition
• Made up of two membrane bound chains, α and β. The domains from those chains form the peptide binding site
Term
Complement proteins of the Classical pathway
Definition
C-reactive protein, C1, C1s, C4, C2, C4bC2a (C3 convertase), C3, C4bC2aC3b (c5 convertase), C5
Term
Complement proteins of the Alternative pathway
Definition
C3b, factor B and factor D, C3bBb (C3 convertase)
Term
Complement proteins of the Lactin pathway
Definition
MBL containing 2 MASPI and 2 MASPII, C4bC2b (C3 convertase)
Term
Plasma cells orginate from which hematopoeitc line?
Definition
Lympoid lineage
Term
MHC class I expressed on
Definition
all nucleated cells
Term
MHC class II expressed on
Definition
most hematopoietic cells, microglia and epthielial stem cells
Term
istoype switching occurs in which organs?
Definition
secondayr lympoid organs
Term
isotype switching occurs on which cells?
Definition
activated B cells
Term
Which immunoglobulins are found in the blood?
Definition
IgG, IgM and monomeric IgA
Term
which immunoglobulins are found in the extracellular fluids?
Definition
IgG and monomeric IgA
Term
which immunoglobulins are found in the secretions?
Definition
dimeric IgA
Term
which immunoglobulins are found in the connective tissues?
Definition
IgE
Term
Which immunoglobuin predominates in newborns?
Definition
IgG
Term
Which immunoglobuins found in primary immune response?
Definition
IgM
Term
Which immunoglobuins found in secondary immune response?
Definition
IgG
Term
Primary vs. Secondary response
Definition
If an antigen reoccurs, the secondary response occurs. This respronse only takes hours to begin and peaks within a few days. The pathogen is removed before it has a chance to infect due to the memory cells.
Term
Immunogenicity
Definition
the difference in strength of antigens depending on (1) chemical structure/composition and (2) density of epitopes
Term
Examples of Chemokines
Definition
CXC, CC, CX3C, CXCL8
Term
two functions of chemokines
Definition
(1) inflammatory (induced by inflammatory signals) and (2) homeostatic (always expressed)
Term
First signal required for T cell activation?
Definition
TCR with MHC/Antigen complex
Term
Second signal required for T cell activation?
Definition
CD28 (receptor on T cell) with B7.1 or B7.2 (its corresponding ligands on DCs)
Term
First signal required for supression of T cells?
Definition
TCR with MHC/Antigen complex
Term
Second signal required for supression of T cells?
Definition
CTLA-4 (receptor on T cell) with B7.1 or B7.2 (its corresponding ligands on DCs)
Term
How is anergy induced in T cells?
Definition
by T cells binding with antigen presenting self antigen cells, without a costimulatory molecule.
Term
cellular immunity
Definition
any cell-mediated antigen specific adaptive immunity response which utlizes antigen specific T cells
Term
humoral immunity
Definition
antigen specific antibody mediated response
Term
role of IL-2 in T cell proliferation
Definition
IL-2 is secreted by the orginal naive T cell which has become activated by an antigen presenting cell. IL-2 activates other T cells without the duel signaling process
Term
Three outcomes of opsonization
Definition
increased inflammaton, membrane attack complex or phagocytosis
Term
Functions of each of the 8 chains of the T cell receptor?
Definition
The alpha and beta chains are antigen recognizers. The CD3 receptors stabilze and the zeta chains transmit the signal
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