title: A Review of the Pathogenesis of Toxic Epidermal Necrolysis.
abstract: Toxic epidermal necrolysis (TEN) is a rare skin condition, most often drug-induced, known for its skin detachment and high mortality. In general, acute TEN is considered a T-cell mediated, type IV hypersensitivity disorder. It mostly results from a cumulative effect of risks from the drug structure, drug metabolism, HLA alleles and T cell clonotypes. However, the precise mechanism of TEN is still unknown. Apoptosis or necroptosis causes keratinocytes to lose their shape and adhesion, and necrosis predominates within a few days. Total epidermal necrosis separates the epidermis from the dermis. TEN is regarded as an immune reaction with predominantly CD8+ T lymphocytes, monocytes/macrophages, and natural killer cells. Impaired regulatory T-cells, T-helper 17 cells, cytotoxic granules such as perforin-granzyme and granulysin, tumor necrosis factor α, annexin, microRNA-18a-5p, and drug metabolites are all thought to be involved. From what is known, it can be assumed their mechanism is complex, and there is still much to be investigated. New findings will contribute to the identification of effective active methods of intervention.
authors.affiliation: Department of Dermatology, Nippon Medical School.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Kinoshita
authors.forename: Hidehisa
authors.initials: H
authors.lastname: Saeki
mesh_terms: D000483:Alleles; D017302:Annexins; D000945:Antigens, Differentiation, T-Lymphocyte; D017209:Apoptosis; D020405:Dermis / Q000473:pathology; D004817:Epidermis / Q000473:pathology; D053804:Granzymes; D006680:HLA Antigens / Q000235:genetics; D006801:Humans; D015603:Keratinocytes / Q000473:pathology; D008264:Macrophages / Q000276:immunology; D035683:MicroRNAs; D009336:Necrosis; D054353:Perforin; D013262:Stevens-Johnson Syndrome / Q000209:etiology* / Q000473:pathology; D013601:T-Lymphocytes / Q000276:immunology; D014409:Tumor Necrosis Factor-alpha
chemical_list: D017302:Annexins; D000945:Antigens, Differentiation, T-Lymphocyte; C075005:GNLY protein, human; D006680:HLA Antigens; C581632:MIRN18 microRNA, human; D035683:MicroRNAs; D014409:Tumor Necrosis Factor-alpha; D054353:Perforin; D053804:Granzymes