Optimizing Antibody Oligo-Conjugates Staining for Single-Cell Multiomics
Key takeaways
- Antibody oligo-conjugates (AOCs) let researchers profile gene expression and surface protein markers at the same time. In CITE-seq the reagent is called an antibody-derived tag (ADT); the same molecule also drives spatial transcriptomics and Immuno-PCR.
- Many antibodies are used at unnecessarily high concentrations, wasting reagents and raising sequencing costs through excessive ADT background.
- Reducing staining volume has minimal impact on most markers, so smaller volumes conserve reagents without compromising data quality.
- Lowering antibody concentrations in a 50-plex panel gave a 3.9x cost reduction while improving ADT signal-to-noise and sequencing efficiency.
Antibody oligo-conjugates (AOCs) let you profile gene expression and surface protein markers in the same single cell. In CITE-seq the oligo on each antibody is sequenced and counted as an antibody-derived tag, or ADT, which is the name most single-cell papers use for these reagents. The catch is cost: getting clean, high-quality data without wasting reagent or sequencing depth takes some optimization.
A study by Buus et al. (eLife, 2021) tackled a critical issue: how to fine-tune antibody concentration, staining volume, and cell number to enhance signal, reduce background, and cut sequencing costs in CITE-seq, spatial transcriptomics, and antibody-derived DNA tag methods like Immuno-PCR. The findings?
1. Many antibodies are used at unnecessarily high concentrations, leading to wasted reagents and increased sequencing costs from excessive ADT background.
2. Reducing staining volume has minimal impact on most markers.
3. Lowering antibody concentrations in a 50-plex panel led to a 3.9x cost reduction while improving ADT signal-to-noise and sequencing efficiency.
For those developing or optimizing single-cell multiomics, spatial proteomics, or AOC workflows, this study provides a practical road map for improving performance while reducing reagent costs.
Reference - Improving oligo-conjugated antibody signal in multimodal single-cell analysis.