Hypersensitivity Flashcards

1
Q
What regulates cellular immunity. 
Is protective
-clear infected or mutant cells
-activate macrophages
Pathological
-Cell-mediated hypersensitivities
A

TH1

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2
Q

This regulates humoral immunity.

Antibody-mediated hypersensitivities

A

TH2

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3
Q

Allergy/Anaphylactic/Atopy/Immediate

A

ACID

Type 1

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4
Q

Cell-bound antigen/Cytotoxic

A

ACID

Type 2

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5
Q

Immune Complex

A

ACID

Type 3

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6
Q

Delayed-Type

A

ACID

Type 4

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7
Q

Can a primary (first-time) exposure cause a true allergic reaction?

A

No
First exposure sensitized to allergen
Subsequent exposures damage

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8
Q

If something is IgE mediated what type is it?

A

Type 1!

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9
Q

IgE will dock on mast cells and ________-

A

Basophils

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10
Q

If you have systemic release of histamine what happens to Blood pressure?

A

It decreases

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11
Q

Early phase type 1 response

A

Degranulation:
Histamine and IgE related
Heparin
Eosinophil chemotactic factor A

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12
Q

Late-phase response (2-4 hrs post)

A

Arachidonic acid cascade

-leukotrienes are 1000 times more potent than histamine

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13
Q

SRS-A

A

Are leukotrienes!

Slow reacting substance of anaphylaxis!

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14
Q

Localized disorder of allergy

A

Atopy

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15
Q

Allergic rhinitis

A

Localized: hay fever

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16
Q

atopic dermatitis

A

Localized: Eczema

17
Q

Urticatia

A

Localized: Hives

18
Q

Swelling of face with anaphylaxis. is called what?

A

angioedema

19
Q

This is complicated, allergic or non-allergic, has huge inflammatory component.

A

Asthma

20
Q

Know flow chart of anaphylactic shock

A

Antigen exposure (Th-2 leads to IgE production (IL-4))
Antigen crosslinks IgEs on mast cells
Mast cells degranulate, release: Bronchiole constriction.
screw it just look at slide 11

21
Q

What counters histamine and leukotrienes by relaxing bronchiospasm, reduces vascular permeability, and improves cardiac output

A

Epinephrine (adrenaline)

22
Q

What is the least common immunoglobulin in plasma? Binds directly to FCe receptors on eosinophils. involved in allergic reactions

A

IgE

23
Q

Type 1

A

IgE

24
Q

Type 2

A

IgG or IgM

25
Q

What is involved in parasitic infections?

A

binding of eosinophils to IgE-coated parasites results in killing of the parasite

26
Q

Does IgE fix complement?

A

no

27
Q

True/False: Eosinophils alone can’t attack parasites, they need IgE as well.

A

True

28
Q

Half of an antigen (piece of antigen, drug can bind to membrane it can look like antigen and then you make antibodies to it.

A

Haptin