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Related Concept Videos

Epigenetic Regulation01:37

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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
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Using Lipid Nanoparticles for the Delivery of Chemically Modified mRNA into Mammalian Cells
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Enhanced Epigenetic Modulation via mRNA-Encapsulated Lipid Nanoparticles Enables Targeted Anti-inflammatory Control.

Tahere Mokhtari1,2,3, Mohammad N Taheri1,2,3, Sarah Akhlaghi1,2

  • 1Division of Experimental Pathology, Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, United States.

ACS Synthetic Biology
|January 15, 2026
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Summary
This summary is machine-generated.

This study presents a novel zinc finger (ZF)-based repressor system delivered by lipid nanoparticles to control immune responses. The technology shows therapeutic potential for inflammatory diseases and enhances gene therapy delivery by reducing immune reactions.

Keywords:
Epigenetic engineeringImmunomodulationInflammatory diseasesLipid nanoparticlesMyd88Zinc finger transcriptional repressors

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Area of Science:

  • Immunology
  • Molecular Biology
  • Gene Therapy

Background:

  • Inflammatory diseases pose significant health challenges, necessitating novel therapeutic strategies.
  • Controlling immune signaling pathways offers a promising avenue for treating these conditions.
  • Current gene therapy methods can elicit immune responses that limit their efficacy.

Purpose of the Study:

  • To develop and evaluate an enhanced zinc finger (ZF)-based transcriptional repressor system for *in vivo* immunomodulation.
  • To assess the therapeutic potential of targeting Myd88, a key immune adaptor molecule.
  • To investigate the system's ability to improve repeated adeno-associated virus (AAV) administration by mitigating antibody responses.

Main Methods:

  • Engineering a ZF-based transcriptional repressor system.
  • Delivering the repressor system via lipid nanoparticles for *in vivo* application.
  • Targeting the Myd88 gene to modulate immune signaling pathways.
  • Evaluating therapeutic efficacy in a mouse model of septicemia.
  • Assessing the impact on antibody responses following repeated AAV administration.

Main Results:

  • The ZF-based repressor system effectively controlled immune signaling pathways *in vivo*.
  • Demonstrated therapeutic efficacy against septicemia in C57BL/6J mice.
  • Successfully reduced antibody responses, thereby improving repeated AAV administration.
  • The epigenetic engineering approach proved safe and efficient for immunomodulation.

Conclusions:

  • The developed ZF-based transcriptional repressor system offers a powerful platform for therapeutic immunomodulation.
  • This epigenetic engineering strategy provides a safe and efficient method for controlling inflammatory responses.
  • The system has broad applicability for diseases characterized by imbalanced inflammation and can enhance gene therapy delivery.