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An immune disorder is a dysfunction of the immune system. [1] These disorders can be characterized in several different ways: By the component(s) of the immune system affected; By whether the immune system is overactive or underactive; By whether the condition is congenital or acquired
Lupus, formally called systemic lupus erythematosus (SLE), is an autoimmune disease in which the body's immune system mistakenly attacks healthy tissue in many parts of the body. [1] Symptoms vary among people and may be mild to severe. [1]
Without functional ribonucleotide reductase, lymphocyte proliferation is inhibited and the immune system is compromised. Purine nucleoside phosphorylase deficiency: An autosomal recessive disorder involving mutations of the purine nucleoside phosphorylase (PNP) gene. PNP is a key enzyme in the purine salvage pathway.
The lack of naïve T lymphocytes is the cause of low plasticity of the immune system in the elderly. [11] In aging of the immune system is also a decrease in central tolerance and an increase in the number of autoreactive T cells. [12] B cells also have a decreased repertoire of naïve cells and an increase in memory B cells. [13]
A class of diseases, some of which may be autoimmune. Erythroblastosis fetalis: Mother's immune system attacks fetus. An immune system disorder but not autoimmune. Fibrodysplasia ossificans progressiva: Possibly an immune system disorder but not autoimmune. Gastrointestinal pemphigoid: No consistent evidence of association with autoimmunity.
Primary immunodeficiencies are disorders in which part of the body's immune system is missing or does not function normally. [1] To be considered a primary immunodeficiency (PID), the immune deficiency must be inborn, not caused by secondary factors such as other disease, drug treatment, or environmental exposure to toxins.
Hypersensitivity (also called hypersensitivity reaction or intolerance) is an abnormal physiological condition in which there is an undesirable and adverse immune response to an antigen. [1] [2] It is an abnormality in the immune system that causes immune diseases including allergies and autoimmunity.
The decreased ability of the immune system to clear infections in these patients may be responsible for causing autoimmunity through perpetual immune system activation. [ 14 ] One example is common variable immunodeficiency , in which multiple autoimmune diseases are seen, e.g., inflammatory bowel disease, autoimmune thrombocytopenia and ...