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J Vis Exp ; (156)2020 02 19.
Artículo en Inglés | MEDLINE | ID: mdl-32150154

RESUMEN

Immune cell subtype population frequencies can have a large effect on the efficacy of T cell therapies. Current methods, like flow cytometry, have specific sample requirements, high sample input, are low throughput, and are difficult to standardize, all of which are detrimental to characterization of cell therapy products during their development and manufacturing. The assays described herein accurately identify and quantify immune cell types in a heterogeneous mixture of cells using isolated genomic DNA (gDNA). DNA methylation patterns are revealed through bisulfite conversion, a process in which unmethylated cytosines are converted to uracils. Unmethylated DNA regions are detected through qPCR amplification using primers targeting converted areas. One unique locus per assay is measured and serves as an accurate identifier for a specific cell type. The assays are robust and identify CD8+, regulatory, and Th17 T cells in a high throughput manner. These optimized assays can potentially be used for in-process and product release testing for cell therapy process.


Asunto(s)
Linfocitos T CD8-positivos/citología , Metilación de ADN , Epigénesis Genética , Reacción en Cadena en Tiempo Real de la Polimerasa/métodos , Linfocitos T Reguladores/citología , Células Th17/citología , Linfocitos T CD8-positivos/metabolismo , Células Cultivadas , Humanos , Análisis de Secuencia de ADN/métodos , Sulfitos/química , Linfocitos T Reguladores/metabolismo , Células Th17/metabolismo
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