Multiomic single-cell sequencing of skin and blister fluid from patients with severe cutaneous adverse drug reactions.
Ontology highlight
ABSTRACT: Severe cutaneous adverse reactions (SCAR) are rare but life-threatening drug reactions mediated by human leukocyte antigen (HLA) class I-restricted CD8+ T-cells. To obtain an unbiased assessment of SCAR cellular immunopathogenesis, we performed single-cell (sc) transcriptome, surface proteome, and TCR sequencing (5' scRNA-TCR-CITE-seq, 10x Genomics) on unaffected skin, affected skin, and blister fluid from diverse SCAR patients.
Project description:Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) are life-threatening adverse drug reactions characterized by massive epidermal necrosis, in which the specific danger signals involved remain unclear. Here we show that blister cells from skin lesions of SJS-TEN primarily consist of cytotoxic T lymphocytes (CTLs) and natural killer (NK) cells, and both blister fluids and cells were cytotoxic. Gene expression profiling identified granulysin as the most highly expressed cytotoxic molecule, confirmed by quantitative PCR and immunohistochemistry. Granulysin concentrations in the blister fluids were two to four orders of magnitude higher than perforin, granzyme B or soluble Fas ligand concentrations, and depleting granulysin reduced the cytotoxicity. Granulysin in the blister fluids was a 15-kDa secretory form, and injection of it into mouse skin resulted in features mimicking SJS-TEN. Our findings demonstrate that secretory granulysin is a key molecule responsible for the disseminated keratinocyte death in SJS-TEN and highlight a mechanism for CTL- or NK cell—mediated cytotoxicity that does not require direct cellular contact.
Project description:ADRs are immune mediated skin reactions of diverse severity and etiology. The patho-mechanisms are however not well understood. We used a gene expression array for the comparison of the gene expression profile of 2 cutaneous adverse drug reactions (MPR and AGEP) to normal skin.
Project description:Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis; (TEN) are life-threatening adverse drug reactions characterized; by massive epidermal necrosis, in which the specific danger; signals involved remain unclear. Here we show that blister; cells from skin lesions of SJS-TEN primarily consist of cytotoxic; T lymphocytes (CTLs) and natural killer (NK) cells, and both; blister fluids and cells were cytotoxic. Gene expression profiling; identified granulysin as the most highly expressed cytotoxic; molecule, confirmed by quantitative PCR and immunohistochemistry. Granulysin concentrations in the blister fluids; were two to four orders of magnitude higher than perforin,; granzyme B or soluble Fas ligand concentrations, and depleting; granulysin reduced the cytotoxicity. Granulysin in the blister; fluids was a 15-kDa secretory form, and injection of it into; mouse skin resulted in features mimicking SJS-TEN. Our; findings demonstrate that secretory granulysin is a key molecule; responsible for the disseminated keratinocyte death in SJS-TEN; and highlight a mechanism for CTL- or NK cellâmediated; cytotoxicity that does not require direct cellular contact. Experiment Overall Design: Blood samples were obtained from 5 different patients with SJS/TEN. The peripheral blood mononuclear cells (PBMCs) were isolated from the whole blood samples by Ficoll-Isopaque (Pharmacia Fine Chemicals) density gradient centrifugation. Total RNA from PBMC was isolated using the RNeasy kit (Qiagen). The 28S and 18S ribosomal RNA peak ratios were determined using microfluidics technology (Agilent). RNA was subjected to reverse transcription using the Superscript II kit (Invitrogen), and the cleaned cRNA was then hybridized to an Affymetrix human genome U133 plus 2.0 array.
Project description:Allergic and irritant contact dermatitis can be challenging to distinguish. We used single cell RNA sequencing (scRNA-seq) and insterstitial fluid proteomic analysis to compare suction blister biopsy skin samples from human volunteers with induced allergic and irritant contact dermatitis reactions.
Project description:Search for SNPs associated with the pharmacogenomic profile of Benzidazole adverse reactions in Chagas Disease Homo sapiens patients.
Project description:Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) are life-threatening adverse drug reactions characterized by massive epidermal necrosis, in which the specific danger signals involved remain unclear. Here we show that blister cells from skin lesions of SJS-TEN primarily consist of cytotoxic T lymphocytes (CTLs) and natural killer (NK) cells, and both blister fluids and cells were cytotoxic. Gene expression profiling identified granulysin as the most highly expressed cytotoxic molecule, confirmed by quantitative PCR and immunohistochemistry. Granulysin concentrations in the blister fluids were two to four orders of magnitude higher than perforin, granzyme B or soluble Fas ligand concentrations, and depleting granulysin reduced the cytotoxicity. Granulysin in the blister fluids was a 15-kDa secretory form, and injection of it into mouse skin resulted in features mimicking SJS-TEN. Our findings demonstrate that secretory granulysin is a key molecule responsible for the disseminated keratinocyte death in SJS-TEN and highlight a mechanism for CTL- or NK cell—mediated cytotoxicity that does not require direct cellular contact.
Project description:Blister fluid (BF) is a novel and viable research matrix for burn injury study, which can reflect both systemic and local micro-environmental responses. The protein abundance in BF from different burn severities were initially observed using a 2D SDS-PAGE approach. Subsequently, a quantitative data independent acquisition (DIA) method – SWATHTM was employed to characterize the proteome of pediatric burn blister fluid. More than 600 proteins were quantitatively profiled in 87 BF samples from different pediatric burn patients.
Project description:This research study will examine how often hypersensitivity, or allergic reactions, occur in patients receiving the chemotherapy medication oxaliplatin. Hypersensitivity reactions can vary from a transient skin rash and fever to more severe symptoms such as shortness of breath, chest tightness, and a more severe allergic reaction that can affect blood pressure called anaphylaxis. We will be examining how often hypersensitivity reactions occur and how severe the reactions are when they occur. We will also examine whether there are factors that place people at risk for developing hypersensitivity reactions to oxaliplatin. In an optional portion to this study, we will examine whether allergy skin testing can predict whether someone will develop a hypersensitivity reaction.
Participants who develop a moderate to severe allergic reaction to oxaliplatin will be invited to participate in an additional portion of the study examining a desensitization process. This part of the study will examine whether a desensitization process can prevent future hypersensitivity reactions to oxaliplatin in patients who previously developed moderate to severe hypersensitivity reactions and allow therapy with oxaliplatin to continue.