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Serum sickness-like reaction : ウィキペディア英語版 | Serum sickness-like reaction Serum sickness-like reactions refer to adverse reactions that have similar symptoms to serum sickness, but in which immune complexes are not found.〔James, William; Berger, Timothy; Elston, Dirk (2005). ''Andrews' Diseases of the Skin: Clinical Dermatology''. (10th ed.). Saunders. ISBN 0-7216-2921-0.〕 == Pathogenesis == Serum sickness-like reaction is named for its clinical similarity to serum sickness, in which immune complexes are deposited in the skin, joints, and other organs. True serum sickness, a type III hypersensitivity reaction, results in fever, lymphadenopathy, arthralgias,cutaneous eruptions, gastrointestinal disturbances, proteinuria,and significant decreases in serum complement levels; it was originally described after patients were infused with equine immunoglobulins. In contrast, serum sickness-like reactions are specific drug reactions that are not associated with circulating immune complexes. Although the exact pathogenesis is poorly understood, serum sickness-like reactions are thought to originate from an abnormal inflammatory reaction that occurs in response to defective metabolism of drug byproducts generated during pharmacologic therapy; the metabolic flaw could be a maternally-inherited trait. In vivo hepatic drug biotransformation studies have shown greater lymphocyte killing in subjects with a known history of serum sickness-like reactions than in control subjects.
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