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Immunology Review Lecture
Exam 1
106
Immunology
Graduate
11/02/2012

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Cards

Term
Which cells do MHC class I interact with?
Definition
MHC class I acts a ligand to cytotoxic T cells via their TCR
Term
Name the receptors (3) on the Natural Killer Cell and what they bind to
Definition
NKG2D on NK binds with MIC ligand on pathogen (infection)
Fc(gamma)R on NK binds with IgG coating pathogen in adaptive immunity
Inhibitory receptor on NK binds to MHC class I presenting self receptor (no infection)
Term
What do natural killer cells do?
Definition
Kill virally infected cells
Term
Newborns contain which isotype?
Definition
IgG because it can cross the placenta
Term
Beginning stage of Primary Immune response
Definition
IgM for neautralization
Term
late stage of secondary immune response
Definition
IgG (isotype swtiching)
Term
beginning stage of secondary immune response
Definition
IgG, B cells go into memory cells
Term
on which cells does affinity maturation occur?
Definition
activated B cells (Ag primed)
Term
When do B cells met dc cells?
Definition
affinity maturation
Term
affinity maturation of B cells
Definition
Dc cells present ag via MHC class II to B cells, if they hold tight they survive and then activated B cells can go present ag to T helper cells via MHC class II and then T helper cells secerete IL-4 and IL-5
Term
Th-1
Definition
cellular immunity
Term
Th-2
Definition
humoral immunity
Term
is Th-2 involved in ADCC?
Definition
yes, antibodies!
Term
which cells produce immunoglobulins?
Definition
B cells
Term
Another word for T cell activation?
Definition
Clonal expansion
Term
What is the cytokine involved in T cell activation?
Definition
IL-2
Term
on which T cells do they first and secoond signals occur?
Definition
naive T cells
Term
When does anergy happen?
Definition
when there is no 2nd signal
Term
What does anergy function in?
Definition
peripheral tolerance
Term
How does a virally infected dendritic cell present antigen?
Definition
on MHC I to cytotoxic t cells
Term
how does a virally infected target cell present antigen?
Definition
on MHC I to cytotoxic T cells
Term
Is 2nd signal required for target cell and effector cell interaction?
Definition
no
Term
B cell activation needs
Definition
CD40R and CD40L on T cells
Term
When does B cell present CD40L?
Definition
in affinity maturation with dendritic cells
Term
When T cell presents CD40L and dendritic cell presents CD40...
Definition
NOT 2nd signal
Term
Do Th-2 always need to activate B cells?
Definition
No, B cells can be activated via T independent antigen
Term
What type of immunglobulin coats super anitgens?
Definition
IgM
Term
Which molecule has the highest immunogenicity?
Definition
Proteins
Term
Where does isotype switching occur?
Definition
germinal centers in lymph nodes
Term
Which immunoglobulin does isotype switching start with?
Definition
IgM
Term
On which cells is CD4 a co receptor?
Definition
T helper cells AND T regulatory cells
Term
What do T regulatory cells do?
Definition
supress immune response and peripheral tolerance
Term
CD34
Definition
marker in human stem cells
Term
Which 2 cells are responsible for phagocytosis?
Definition
macrophages and neutrophils
Term
Are chemokines important for phagocytosis?
Definition
Yes, they call neutrophils to the sceane
Term
Allelic exclusion
Definition
stops somatic recombination in alleles
Term
on which cells does allelic exclusion occur?
Definition
pre B and pre T
Term
Which parts of the immunoglobulin are regulated by allelic exclusion?
Definition
Heavy and Light chain
Term
Which parts of the TCR are regulated by allelic exclusion?
Definition
alpha and beta
Term
How is the hypervariable region formed?
Definition
somatic recombination
Term
Allelic exclusion is important for?
Definition
hypervariable specificity
Term
is inflammatory response always good for the general health condition?
Definition
no
Term
T cell activation leads to...
Definition
IL-2 production
Term
when pathogen is defeated what is expressed on the T cells?
Definition
CTLA4
Term
when a T cell attacks a virally infected cell does it need a secondary signal?
Definition
no
Term
when a dendritic cell presents a self antigen is there a second signal?
Definition
no
Term
where is primary tolerance mediated?
Definition
bone marrow and thymus
Term
how is primary tolernace mediated?
Definition
negative selection
Term
how is peripheral tolerance mediated?
Definition
anergy and t regulatory cells (IL-10)
Term
Does isotype switching add diversity to B cells?
Definition
no
Term
allotype
Definition
any individual difference
Term
isotype
Definition
physical structure differences
Term
idiotype
Definition
antigen specifity
Term
T independent B cell activation
Definition
B cells cross link strong to antigen
Term
In T dependent B cell activation B cells normally need
Definition
Th-2 Cells, IL-4 and IL-5
Term
B cells interact with pathogens by..
Definition
binding their Fc receptor to the immunglobulin on the surface of the cell
Term
B cells interact with T helper cells by...
Definition
presenting the antigen via MHC II
Term
T cells respond to B cells by...
Definition
producing IL-4 and IL-5 and clonally expanding
Term
All T helper cells
Definition
produce cytokines
Term
Th 1
Definition
cellular immunity
Term
Th 2
Definition
humoral immunity
Term
does Th-2 contribute to ADCC?
Definition
YES!!!
Term
Does innnate immuniy change in second response?
Definition
no
Term
How does adaptive immunity function in seoncdary response
Definition
preformed antibody and memory cells
Term
Does ADCC happen at the beginning of primary immune response?
Definition
no because no antibodies yet
Term
What is the first antibody to show up?
Definition
IgM
Term
What do antibodies do?
Definition
coat/opsonize for phagocytosis and neutralize the bacteria
Term
are antibodies effective when virus is extra cellular?
Definition
Yes
Term
How are antibodies effective on extra cellular virus?
Definition
block active structure and neutralize structure
Term
PLasma cells are in which lineage?
Definition
lymphoid, B cell lineage
Term
How many binding sites does IgM have?
Definition
10
Term
isotype in seondary immune response?
Definition
IgG
Term
CD3a...
Definition
chemoattractant
Term
CD3b...
Definition
opsonization
Term
CD5a...
Definition
anaphylaxis
Term
CD5b...
Definition
membrane attack complex
Term
Chemotoxins in innate immunity?
Definition
CD3a and CD5a
Term
which receptors do MHC interact with?
Definition
TCR and BCR
Term
are MHC's ligands or receptors?
Definition
ligands
Term
What was Jenner famous for?
Definition
cross-immunity
Term
Immunoglobulins (3 things)
Definition
expresses on cell surfaces
receptor on B cells and T cells
secreted by plasma cells
Term
how are TCR similar to antibodies on B cells? (2)
Definition
they both posesse structure domain known as immunoglobulin

they have heavy and light chains (beta and alpha)
Term
When hematopoietic stem cells enter the thymus what are the called?
Definition
Thymocytes
Term
CCR7
Definition
chemokine
Term
Who expresses receptors for CCR7
Definition
T cells, B cells, and dendritic cells
Term
what does CCR7 do?
Definition
directs cells into secondary lymph tissue
Term
What are the two isotypes for light chain in antibodies?
Definition
Kappa and Lamda
Term
what is the ratio of kappa: lambda?
Definition
2:1
Term
Too much kappa in a person could mean?
Definition
malignant B cells because leukemia changes the ratios
Term
ratio of CD4: CD8
Definition
2:1
Term
which cell does HIV infect?
Definition
CD4
Term
what fraction of T cells are CD8?
Definition
1/3
Term
what fraction of T cells are CD4?
Definition
2/3
Term
can a physical condition change antigen strength?
Definition
yes
Term
can antigen-antibody specificity change?
Definition
no
Term
bone marrow transplantation
Definition
enrich stem cells into peripheral blood in order to increase the peripheral blood in circulation
Term
What cytokines do macrophages produce? (6)
Definition
IL-6, IL-1, CXCL8, GM-CSF, INF, TNF
Term
What does IL-6 do?
Definition
signaling receptor, stimulates acute phase protein production in liver
Term
What does IL-1 do?
Definition
stimulates IL-6
Term
What does CXCL8 do?
Definition
brings neutraphils to infection site
Term
what does GM-CSF do?
Definition
increases production of stem cells in bone marrow
Term
what does INF do?
Definition
increases amount of natural killer cells and cytotoxic t cells and interferes with viral replication
Term
What does TNF do?
Definition
increases inflammatory responses
Term
autoimmunity means...
Definition
tolerance is lost to self antigen
Term
ligands could be...
Definition
soluble or on cell surface
Term
receptor
Definition
receives a signal, could be used as a marker
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