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. 2020 Jul;140(7):1442-1445.e4.
doi: 10.1016/j.jid.2019.11.020. Epub 2019 Dec 26.

Analysis of Skin-Resident Memory T Cells Following Drug Hypersensitivity Reactions

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Analysis of Skin-Resident Memory T Cells Following Drug Hypersensitivity Reactions

Jason A Trubiano et al. J Invest Dermatol. 2020 Jul.
No abstract available

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Conflict of interest statement

Conflict of Interest Statement:

The authors state no conflict of interest

Figures

Figure 1.
Figure 1.
TRM cell persistence in skin following intradermal drug inoculation in patients with a history of DRESS or MPE. IDT with causative drugs was performed on five patients (3 DRESS [circles] and 2 MPE [squares]), and skin biopsies were taken from the reactive exanthema (Lesion) and control (Ctrl) skin 1 day (Acute-IDT) and > 8 weeks (Post-IDT, red) later. Both MPE patients had CLL. (a) Image shows Lesion and Ctrl skin biopsy sites during acute-IDT reaction and post-IDT from a representative patient (ID 1). The site of the control biopsy was distinct from the adjacent lesion. This patient was IDT positive to additional beta-lactam antibiotics (benzylpenicillin, ampicillin), which are routinely tested in the setting of a primary beta-lactam allergy (flucloxacillin). Patient consent for image publication was obtained. (b–e) Flow cytometry was performed on lymphocytes extracted from skin biopsies. Individual data points are shown (n = 5) and paired samples connected where available (n = 3). (b) Representative flow cytometry plots show CD4 and CD8 staining of CD3+CD45RO+ T cells. The mean frequency is shown (n = 4 Acute-IDT, n = 4 Post-IDT). (c) Ratio of the number of CD4+ (left) and CD8+ (right) T cells isolated from Lesion compared with Ctrl skin. (d) Representative flow cytometry plots show CD69 and CD103 expression by CD4+ (left) and CD8+ (right) CD3+CD45RO+ T cells. The mean frequency is shown (n = 5). (e) Ratio of the number of CD103 or CD103+ T cells isolated from Lesion compared with Ctrl skin of CD69+ CD4+ T cells (left) and CD69+ CD8+ T cells (right). CLL, chronic lymphocytic leukemia; Crtl, control; DRESS, drug reaction with eosinophilia and systemic symptoms; IDT, intradermal drug testing; Lesion, reactive exanthema; MPE, maculopapular exanthema; TRM, tissue-resident memory T cells.

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