Adaptive Immune Disease - German 2017 - edited from Cutler Flashcards
Autoimmune Diseases are loss of ____ leading to hypersensitivity reactions.
-Tolerance
What type of selection in B cells contribute to self-tolerance?
-Negative selection
What types of hypersensitivity reactions are involved in Autoimmune Diseases?
-Type II-Type III-Type IV
AD’s are caused by what two things?
- Genetics
- Environments
_____ subtype influences AD development.
-HLA
HLA genes are associated with susceptibility in what percent of ADs?
50%
WhatMHC class of alleles are most frequently implicated in ADs?
-Class II
Grave’s disease is associated with what type of hypersensitivity?
-Type II
Type 2 Diabetes is associated with what type of hypersensitivity?
-Type II
Rheumatic Fever is caused by what? What type hypersensitivity is it? Why does it not last forever?
-Molecular mimicry
Type 2 hypersensitivity
it doesn’t last forever because T cells are not involved because it is just antibody mediated. This demonstrates T cell necessity for prolonged autoimmunity
T/F S. pyogenes cell wall shares human epitopes and that is how Rheumatic Fever is caused by Molecular mimicry
True
Graves disease is associated with antibody binding that causes what to happen to the Thymus?
Activation of the thymus because the antibodies act as a TSH agonist and thus excessive thyroid hormone release.
T/F If a mother has grave’s disease she can pass it during pregnancy to the baby
True
What disease is associated with the destruction of normal thyroid tissue (hypothyroidism, the thyroid looks enlarged though)? What cells mediate this destruction?
-Hashimoto’s disease
mediated by CD4 TH1 cells
What type of hypersensitivity is Hashimoto’s disease associated with?
-Type II