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Allergy and Hypersensitivity K. J. Goodrum 2006. Types of Immune Hypersensitivity Reactions.

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Presentation on theme: "Allergy and Hypersensitivity K. J. Goodrum 2006. Types of Immune Hypersensitivity Reactions."— Presentation transcript:

1 Allergy and Hypersensitivity K. J. Goodrum 2006

2 Types of Immune Hypersensitivity Reactions

3

4 Properties of Inhaled Allergens

5 Penetration of epithelial Barriers by Allergens

6 Early IL-4 response promotes Th2 development that drives B cell class switching to IgE

7 Signaling through Stat6 is necessary for Th2 responses. Th2 cells support IgE responses.

8 Antigen binding to IgE on mast cells leads to amplification of IgE production

9 Mast cell activation affects many tissues

10 Molecules released upon activation of mast cells

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12 Toxic granule proteins and inflammatory substances released upon activation of eosinophils

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14 Acute vs. late phase inflammatory responses

15 TH2 mediated chronic inflammation in Asthma

16 Treatment approaches for IgE-mediated Allergy

17 Type II Cytotoxic reaction

18 Immune Complex mediated local inflammation such as in Arthus Reaction

19 Serum Sickness: an Immune complex disease

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21 Type IV Hypersensitivity Reactions

22 Stages of a Type IV Hypersensitivity Reaction

23 Th1 derived cytokines and chemokines direct Type IV reactions

24 Allergic Contact Dermatitis: A type IV reaction

25 Blistering skin lesions on hand of patient with poison ivy contact dermatitis (a type IV reaction)

26 Granulomatous inflammation is a consequence of chronic Type IV reactions


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