ArticlePhotodermatology, photoimmunology & photomedicine2022
Monitoring malignant T-cell clones by direct TCR expression assay in patients with leukemic cutaneous T-cell lymphoma during extracorporeal photopheresis.
Article in Photodermatology, photoimmunology & photomedicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed, 3 citations in OpenAlex.
- Immunogenetics and TCR expression patterns together predict future T1D onset from multi-omic datasets.Frontiers in genetics · 2026Article
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5 authors at 1 institution in 1 country.
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Abstract
background/purposeAccurate assessment of malignant T-cell clones in patients with leukemic cutaneous T-cell lymphoma (L-CTCL) is crucial for diagnosis, treatment, and monitoring disease. Although multiple approaches to quantitate malignant T-cell clones have been reported, a cost-effective assay with broad coverage is not available. We report a NanoString-nCounter-Technology-based direct TCR expression assay (DTEA) that was previously developed to quantify both TCR-Vα and TCR-Vβ usages after adoptive immunotherapy. This study was performed to test the effectiveness of DTEA in assessing malignant T-cell clones in L-CTCL patients.
methodsTotal RNAs extracted from peripheral blood mononuclear cells of patients before starting extracorporeal photopheresis (ECP) (n = 15) and during therapy at 3 months and 6 months (n = 12) were used for DTEA, with customized probes for 45 TCR-Vα and 46 TCR-Vβ family members.
resultsAt baseline, DTEA detected TCR-Vβ clones in all 15 patients (100%) compared to flow cytometry that detected TCR-Vβ clones in 9 of 13 patients (69.2%). In addition to predominant TCR-Vβ clones, DTEA also detected additional TCR-Vβ clones in 8 of 15 patients (53.3%). Furthermore, DTEA simultaneously identified clonal TCR-Vα usages, which allowed us to pair TCR-Vα and TCRVβ usages by malignant T-cells and identify diversified clonotypes. Changes in the relative frequencies of clonal TCR-Vβ and TCRVα usages over therapy were consistent with patients' clinical responses.
conclusionsOur results indicate that DTEA can effectively assess malignant T-cell clones by detecting clonal TCR-Vα and TCR-Vβ usages. By providing a global view of TCR repertoires, DTEA may also help us understand the origin(s) of malignant T-cells and pathogenesis of CTCL.
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