MindMap Gallery Autoimmune disease mind map
This is a mind map about medical immunology, including the pathological damage mechanism of autoimmune diseases, the classification and basic characteristics of autoimmune diseases, etc.
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This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about the reproductive development of animals, and its main contents include: insects, frogs, birds, sexual reproduction, and asexual reproduction. The summary is comprehensive and meticulous, suitable as review materials.
autoimmune disease
autoimmunity
Usually does not cause harm to the body
autoimmune disease (AID)
Predisposing factors and mechanisms
changes in autoantigens
Release of antigens from immune isolation sites
Isolated antigen/Cryptoantigen
Such as brain, testicles, eyes, heart muscle and uterus, etc.
Release of isolated antigens in cases of surgery and trauma → contact with the immune system → activate autoreactive lymphocytes → attack the corresponding parts to cause lesions
changes in autoantigens
biological, chemical, physical factors
hemolytic anemia
Mycoplasma pneumoniae infects red blood cells and changes their antigenicity
rheumatoid arthritis
Rheumatoid factor (RF)
IgM against IgG with altered antigenicity
Systemic Lupus Erythematosus (SLE)
Skin is exposed to UV rays → DNA becomes the target antigen
molecular simulation
Hemolytic streptococci cross-react with similar epitopes in the kidney and heart
epitope expansion
Reasons why autoimmune diseases prolong and worsen
An antigen may have multiple epitopes
Dominant epitope (original epitope)
First stimulate an immune response
Cryptic epitope (secondary epitope)
Hidden within the antigen or at low density, subsequently stimulating immune response
systemic lupus erythematosus
Anti-membrane antigen antibody → anti-nuclear antibody (ANA) (anti-histone antibody, anti-DNA antibody)
Abnormalities of the immune system
Abnormal clearance of autoreactive lymphocytes
normal circumstances
hub - negative selection
Peripheral—AICD mechanism
abnormal situation
negative selection disorder
Fas/FasL gene mutation
Autoimmune regulatory factor (AIRE) gene mutation → reduced or absent tissue-restricted antigen (TRA) expression in thymic stromal cells → impaired clearance of autoreactive T cell clones
Breaking immune neglect
immune neglect
DCs are activated by foreign microorganisms → present autoantigens that are ignored by immunity
Polyclonal activation of lymphocytes
B cell polyclonal stimulators
Macrophage virus, Epstein-Barr virus, HIV
T cell polyclonal stimulator
Bacterial exotoxins and retroviral proteins
Abnormal expression of MHC-II molecules
activation-induced cell death disorder
AICD-related genetic defects
Fas gene mutation
Regulatory T cell dysfunction
genetic factors
The correlation between HLA genes and autoimmune diseases
Association between non-HLA genes and autoimmune diseases
autoantigen gene
innate immunity related genes
Signaling and transcription factor genes
Cytokine and receptor genes
lymphocyte regulatory genes
complement genes
other factors
gender factors
Women are 10-20 times more susceptible to multiple sclerosis and SLE than men
Men are 3 times more susceptible to ankylosing spondylitis than women
age factor
Autoimmune diseases mostly occur in the elderly and are very rare in children
Low thymus function in the elderly leads to immune system dysfunction
Pathological damage mechanism of autoimmune diseases
Type II hypersensitivity reaction
Autoantibodies—directly destroy cells
autoimmune anemia
pernicious anemia
drug-induced hemolytic anemia
autoimmune thrombocytopenic purpura
autoimmune neutropenia
Autoantibodies – abnormal cell function
toxic diffuse goiter
Myasthenia gravis (MS)
Type III hypersensitivity reaction
Autoantibodies and antigens form IC—mediating tissue damage
Systemic Lupus Erythematosus (SLE)
mechanism
Anti-DNA, histones, red blood cells, platelets, white blood cells, coagulation factors and other autoantibodies form a large number of immune complexes with self-antigens
Deposited on the walls of small blood vessels in the skin, glomeruli, joints, brain, etc., activating complement and causing tissue cell damage
Two main clinical features
Antinuclear antibodies (ANA) appear in serum
Multisystem involvement, especially skin and kidneys
systemic symptoms
fever
Skin and mucous membrane injuries
Butterfly erythema on face
Maculopapular rash, rash, photoallergy, hair loss, oral ulcers, etc.
joint pain
Type IV hypersensitivity reaction
Autoreactive T cell-mediated autoimmune diseases
Insulin-dependent diabetes (type I diabetes)
Autoreactive T lymphocytes continue to kill pancreatic islet cells
Resulting in insufficient insulin secretion (absolute amount)
multiple sclerosis
Autoreactive T lymphocytes (Th1, Th17 cells) attack the spinal cord sheath, causing inflammatory damage
Classification and basic characteristics of autoimmune diseases
Classification
organ specific
Systemic
feature
The patient has high titers of autoantibodies and/or autoreactive T cells
Respond to its own components, causing tissue cell damage or dysfunction
The condition is positively related to the intensity of the immune response, and often occurs chronically and relapses
Passive transfer of disease (animals) via serum or cell delivery
genetically predisposed
Principles of prevention and treatment of autoimmune diseases
Remove factors that cause abnormal immune tolerance
Prevent controllable microbial infections
Use medications with caution
Suppresses immune response to self-antigens
immunosuppressant
Cytokine and its receptor blocking antibodies or blocking agents
Antibodies against immune cell surface molecules
Application of monovalent antigen or epitope peptides
Rebuilding specific immune tolerance to self-antigens
Induction of immune tolerance by oral administration of autoantigens
Oral Type II Collagen (RA)
Inducing immune tolerance by mimicking thymic negative selection
other
Splenectomy
Oral VitB12 to treat anemia