Joint single-cell measurements of surface proteins, intracellular proteins and gene expression with icCITE-seq
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The development of single-cell RNA-sequencing assays has transformed our understanding of cellular and tissue heterogeneity, yielding significant insights into disease biology and its underlying mechanisms. In this work, we describe icCITE-seq (intracellular cellular indexing of transcriptomes and epitopes), a scalable method that simultaneously measures surface and intracellular protein levels alongside gene expression across thousands of cells. We validate the specificity of intracellular staining and demonstrate the utility of this multi-omic approach in interrogating phenotypic cellular states through targeted genetic perturbations in primary human T cells. icCITE-seq enables systematic profiling of gene expression, coupled with cytoplasmic, nuclear and PTM epitopes, providing an integrated approach towards understanding cellular identity, complexity and disease regulatory mechanisms.
