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Related Concept Videos

iChip01:24

iChip

The cultivation of environmental microorganisms has long been hindered by the inability to replicate complex native conditions in vitro. The isolation chip (iChip) addresses this limitation by facilitating the growth of previously uncultivable microorganisms through in situ incubation. Designed for high-throughput microbial cultivation, the iChip comprises hundreds of microchambers, each capable of housing a single microbial cell. These microchambers are loaded with a mixture of molten agar and...

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Cell-free immuno-profiling on a genetically programmed biochip.

Aurore Dupin1, Ohad Vonshak2, Valerie Nir2

  • 1Department of Chemical and Biological Physics, Weizmann Institute, Rehovot, Israel. aurore.dupin@weizmann.ac.il.

Nature Nanotechnology
|December 10, 2025
PubMed
Summary
This summary is machine-generated.

This study presents a novel biochip for rapid, low-cost immuno-profiling. The platform quantifies antibody interactions with SARS-CoV-2 antigens and human serum, enabling personalized immune response analysis.

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Area of Science:

  • Synthetic Biology
  • Biotechnology
  • Immunology

Background:

  • Cell-free synthetic biology offers safe, affordable genetic tools for therapeutics.
  • Accurate measurement of antibody responses is crucial for immuno-profiling and understanding immune reactions.
  • Existing methods for antibody-antigen interaction analysis can be complex and time-consuming.

Purpose of the Study:

  • To develop and validate a microfluidic-free biochip for quantitative analysis of cell-free synthesized antigens and antibodies.
  • To enable high-throughput profiling of antibody specificity and affinity against multiple viral epitopes.
  • To assess patient-specific immune responses using minimal sample volumes.

Main Methods:

  • Utilized a biochip platform with photolithographically patterned compartments and localized gene brushes for cell-free antigen synthesis.
  • Created continuous antigen density gradients within nanoliter compartments to generate antibody binding curves.
  • Synthesized over 30 SARS-CoV-2 viral epitopes on-chip for simultaneous antibody profiling.
  • Analyzed polyclonal antibodies from human serum and on-chip expressed protein-protein interactions (ACE2-RBD).

Main Results:

  • Successfully profiled monoclonal and polyclonal antibody responses against numerous SARS-CoV-2 epitopes with high specificity and affinity determination.
  • Revealed patient-specific epitope profiles from small volumes of human serum, highlighting limitations of conventional methods.
  • Demonstrated the quantitative reconstitution of cell-free expressed human ACE2 receptor interaction with the viral receptor-binding domain on-chip.
  • Achieved rapid and quantitative interrogation of complex protein-protein interactions without requiring protein purification.

Conclusions:

  • The developed biochip platform provides a rapid, quantitative, and cost-effective method for immuno-profiling.
  • This approach enhances preparedness for emerging infectious diseases by enabling swift analysis of immune responses.
  • The cell-free, on-chip system offers a versatile tool for therapeutic antibody development and personalized medicine.