Photocleavable DNA Barcoding Antibodies for Multiplexed Protein Analysis in Single Cells
Adeeti V Ullal1, Ralph Weissleder2
1Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, CPZN 5206, Boston, MA, 02114, USA.
Methods in Molecular Biology (Clifton, N.J.)
|November 7, 2015
Summary
A new DNA-barcoded antibody technique enables single-cell protein analysis. This method uses photocleavable barcodes for digital detection without amplification, allowing multiplexed detection of over 100 proteins.
Area of Science:
- Biotechnology
- Molecular Biology
- Immunology
Background:
- Single-cell protein analysis is crucial for understanding cellular heterogeneity.
- Existing methods for protein detection can be complex and require amplification.
Purpose of the Study:
- To develop a novel DNA-barcoded antibody sensing technique for sensitive and multiplexed single-cell protein analysis.
- To enable digital detection of proteins without amplification steps.
Main Methods:
- Antibodies are conjugated to unique DNA barcodes.
- DNA barcodes are photocleaved from antibodies after target binding.
- Photocleaved DNA barcodes are detected using fluorescent hybridization technology.
- The technique allows for multiplexed detection of over 100 antibodies.
Main Results:
- The DNA-barcoded antibody technique successfully detected proteins at the single-cell level.
- The photocleavage and digital detection method eliminated the need for amplification.
- The protocol demonstrated high multiplexing capability for over 100 antibodies.
- The method is applicable to both single cells and clinical samples.
Conclusions:
- This DNA-barcoding approach provides a simple and effective method for single-cell protein analysis.
- The technique offers a powerful tool for high-multiplexed protein detection in various biological samples.
- The amplification-free digital detection method enhances sensitivity and simplifies the workflow.
