Modular and Cost-Efficient DNA Tagging Strategy for Immunodetection

Researchers have developed a novel modular and site-specific DNA tagging strategy, MaMBA, which enables direct site-specific labeling of off-the-shelf IgG antibodies with a one-component design. This approach, utilizing nanobodies as modular adaptors, offers a cost-efficient and labor-intensive solution for multiplexed target detection. The method, called MaMBA, has been applied to develop two novel detection methods, misHCR and BLISA, which have demonstrated highly multiplexed in situ protein imaging and simultaneous detection of multiple biomolecules in human serum samples.

Key Takeaways:

• MaMBA is a modular and site-specific DNA tagging strategy that enables direct site-specific labeling of off-the-shelf IgG antibodies with a one-component design.
• MaMBA utilizes nanobodies as modular adaptors, offering a cost-efficient and labor-intensive solution for multiplexed target detection.
• The method has been applied to develop two novel detection methods, misHCR and BLISA, which have demonstrated highly multiplexed in situ protein imaging and simultaneous detection of multiple biomolecules in human serum samples.
• MaMBA has been successfully used for multiplexed and high-throughput biomolecule detections, measuring SARS-CoV-2 IgG and HBV-associated antigens in a large number of human serum samples.
• The method has also demonstrated a small-scale drug screen by simultaneously detecting eight protein targets.
• MaMBA offers a highly modular and easily adaptable approach for antibody DNA-barcoding, which can be broadly applied in basic research and clinical diagnostics.
• The method has the potential to revolutionize the field of immunodetection, enabling rapid and accurate diagnosis of various diseases.

Statistics:

• 12 different targets were simultaneously visualized in the same mouse brain sections using the misHCR method.
• 12,000 human serum samples had SARS-CoV-2 IgG and HBV-associated antigens measured using the BLISA method.
• 8 protein targets were simultaneously detected in a small-scale drug screen using the BLISA method.

Sources:

• biorxiv.org/content/10.1101/2025.01.16.633477v2