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Related Concept Videos

Antibody Actions01:26

Antibody Actions

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Antibodies, or immunoglobulins, are critical players in the immune system's arsenal against invading pathogens. Produced by B cells and plasma cells, their primary role is to detect and bind to specific antigens, molecules found on the surface of pathogens like bacteria or viruses. Beyond antigen recognition, antibodies perform several vital functions that contribute to immune defense.
Neutralization
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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
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Antibody activation using DNA-based logic gates.

Brian M G Janssen1, Martijn van Rosmalen, Lotte van Beek

  • 1Laboratory of Chemical Biology and Institute for Complex Molecular Systems, Eindhoven University of Technology, De Rondom 70, 5612 AP Eindhoven (The Netherlands).

Angewandte Chemie (International Ed. in English)
|January 10, 2015
PubMed
Summary
This summary is machine-generated.

We developed peptide-DNA locks for controlling antibody activity using molecular circuits. These locks enable programmable logic gates for advanced signal processing in synthetic biology and diagnostics.

Keywords:
DNA nanotechnologyantibodiesaptamersmolecular computingpeptide-oligonucleotide conjugates

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Area of Science:

  • Biotechnology
  • Synthetic Biology
  • Molecular Diagnostics

Background:

  • Oligonucleotide-based molecular circuits enable autonomous signal processing.
  • Controlling molecular interactions is key for advanced applications.

Purpose of the Study:

  • To introduce bivalent peptide-DNA conjugates as molecular locks for controlling antibody activity.
  • To demonstrate programmable logic gate functions using these molecular locks.

Main Methods:

  • Utilized toehold-mediated strand displacement reactions for control.
  • Employed yeast as a cellular model system.
  • Integrated dual toehold strands for signal integration and logic gate implementation.

Main Results:

  • Achieved reversible control of antibody targeting at low nanomolar concentrations.
  • Demonstrated logic OR- and AND-gates by integrating two inputs.
  • Extended molecular input capabilities using protein-binding aptamers.

Conclusions:

  • Peptide-DNA locks offer a versatile platform for autonomous signal processing.
  • This technology advances synthetic biology, diagnostics, and biomedicine with programmable molecular control.