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Related Concept Videos

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What is Cell Signaling?

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Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate to respond to the environment.
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In multicellular organisms, many molecules transmit signals between cells to pass information. These signals vary in complexity and include small peptides, nucleotides, steroids, fatty acid derivatives, and dissolved gases such as nitric oxide. Some signaling molecules diffuse through the plasma membrane to act locally between neighboring cells or travel long distances. Others remain attached to the cell surface, transmitting information to other cells only when they make contact. In some...
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Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
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Updated: Sep 3, 2025

A Multilayer Microfluidic Platform for the Conduction of Prolonged Cell-Free Gene Expression
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Intracellular Communication between Synthetic Macromolecules.

Cameron W Evans1, Diwei Ho1, Joshua B Marlow2

  • 1School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.

Journal of the American Chemical Society
|July 28, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed novel synthetic polymers for gene therapy, demonstrating that these materials can communicate within cells. This breakthrough improves non-viral delivery efficiency for genetic material, advancing nucleic acid-based therapies.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Molecular Biology

Background:

  • Non-viral delivery systems are crucial for gene therapy, immunization, and RNA interference, aiming to overcome the limitations of viral vectors.
  • Current non-viral carriers, like liposomes and polymers, achieve limited intracellular delivery efficiencies, often below 1%.
  • Existing carrier designs lack precise control over polymer sequence, architecture, and composition, leading to unpredictable outcomes.

Purpose of the Study:

  • To develop advanced synthetic macromolecular carriers with controlled precision for non-viral gene delivery.
  • To investigate the phenomenon of intercellular communication between synthetic macromolecular complexes.
  • To challenge the passive release model of genetic cargo delivery by synthetic agents.

Main Methods:

  • Synthesis of a library of dendronized bottlebrush polymers with precisely controlled defects.
  • Testing concurrent and competitive delivery of DNA using the developed polymer carriers.
  • Analyzing the interactions and communication pathways between synthetic macromolecular complexes within cells.

Main Results:

  • Demonstrated that synthetic macromolecular complexes can engage in communication, previously thought to be exclusive to biomolecules.
  • Achieved a higher level of precision in synthetic carrier design, comparable to biological molecules like DNA and RNA.
  • Provided evidence against the passive bystander model, suggesting active roles for delivery agents in transfection.

Conclusions:

  • The developed dendronized bottlebrush polymers represent a significant advancement in non-viral delivery system design.
  • The discovery of synthetic macromolecular communication opens new avenues for improving intracellular delivery strategies.
  • Understanding these interactions will accelerate the development of effective genome engineering, vaccines, and nucleic acid-based therapies.