CosMx™ Protein Assays

High Resolution Spatial Proteomic Analysis

CosMx™ Protein Assays enable high-plex analysis of up to 68 proteins from a single FFPE slide with spatial context at single-cell resolution. CosMx Protein Assays provide unbiased spatial proteomic analysis of tissue sections to expand the number of markers you can profile compared to traditional immunohistochemical and immunofluorescent methods. All CosMx Protein Assays are validated for use in multiplex, so you can focus on the biology of interest without wasting time troubleshooting assay performance.

How it works

The CosMx Protein Assays rely on antibodies coupled to unique oligonucleotide tags designed for an imaging-based readout on the CosMx™ Spatial Molecular Imager (SMI). CosMx SMI is an integrated system with cyclic fluorescent chemistry, high-resolution imaging, interactive data analysis and visualization software. This imaging-based readout yields a series of fluorescent protein images to provide relative protein abundance at single cell and subcellular resolution. All CosMx Protein assays undergo extensive antibody validation to ensure high quality data.



Exploring Markers of Exhausted CD8 T Cells to Predict Response to Immune Checkpoint Inhibitor Therapy for Hepatocellular Carcinoma

Background: Reversal of CD8 T-cell exhaustion was considered a major antitumor mechanism of anti-programmed cell death-1 (PD-1)/ anti-programmed death ligand-1 (PD-L1)-based immune checkpoint inhibitor (ICI) therapy. Objectives: The aim of this study was to identify markers of T-cell exhaustion that is best associated with ICI treatment efficacy for advanced hepatocellular carcinoma (HCC).

Discovery of CD80 and CD86 as recent activation markers on regulatory T cells by protein-RNA single-cell analysis

Background: Traditionally, the transcriptomic and proteomic characterisation of CD4+ T cells at the single-cell level has been performed by two largely exclusive types of technologies: single-cell RNA sequencing (scRNA-seq) and antibody-based cytometry. Here, we present a multi-omics approach allowing the simultaneous targeted quantification of mRNA and protein expression in single cells and investigate its performance to dissect the heterogeneity of human immune cell populations.

MiR130b from Schlafen4+ MDSCs stimulates epithelial proliferation and correlates with preneoplastic changes prior to gastric cancer

The myeloid differentiation factor Schlafen4 (Slfn4) marks a subset of myeloid-derived suppressor cells (MDSCs) in the stomach during Helicobacter-induced spasmolytic polypeptide-expressing metaplasia (SPEM). Objective: To identify the gene products expressed by Slfn4+-MDSCs and to determine how they promote SPEM.

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