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Optimized Protocol for Efficient Transfection of Dendritic Cells without Cell Maturation
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Apolipoprotein E4 facilitates transfection of human monocyte-derived dendritic cells by lipid nanoparticles

Izabella Lambart1, Hannah Zaryouh2, Jonas Van Audenaerde2

  • 1Merck Healthcare KGaA, Global Drug Product Development, Orals Development, Darmstadt, Germany; Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Faculty I of Natural Sciences, Halle/Saale, Germany.

International Journal of Pharmaceutics
|May 13, 2025
PubMed

Insights

Lipid nanoparticles (LNPs) enhance messenger RNA (mRNA) delivery to dendritic cells. Adding apolipoprotein E4 to LNPs improves mRNA transfection for therapeutic applications.

Area of Science:

  • Biotechnology
  • Immunology
  • Drug Delivery

Background:

  • Messenger RNA (mRNA) offers a safe and rapid therapeutic alternative to viral vectors or plasmid DNA.
  • Free mRNA faces rapid degradation and challenges in reaching target cell cytoplasms.
  • Lipid nanoparticles (LNPs) are effective for safe mRNA delivery to target cells and treating diseases.

Purpose of the Study:

  • To enhance LNP-mediated mRNA delivery to dendritic cells, crucial for mRNA vaccines.
  • To investigate apolipoprotein E4 as a method for increasing LNP transfection efficiency.
  • To optimize LNP preparation using MS2 RNA as a novel model nucleic acid.

Main Methods:

  • Lipid nanoparticles (LNPs) were formulated for mRNA delivery.
  • Apolipoprotein E4 was added to LNPs to assess its effect on transfection.
  • Messenger RNA encoding eGFP was used to evaluate delivery efficiency to human monocyte-derived dendritic cells.
  • MS2 RNA was employed as a model nucleic acid for LNP preparation optimization.

Main Results:

  • Apolipoprotein E4 addition to LNPs enhanced mRNA delivery to human monocyte-derived dendritic cells.
  • The study demonstrated increased LNP-mediated eGFP mRNA delivery.
  • Optimization steps for LNP preparation using MS2 RNA were successfully outlined.

Conclusions:

  • Apolipoprotein E4 is a viable strategy for improving LNP-mediated mRNA delivery to dendritic cells.
  • Enhanced LNP transfection of dendritic cells is critical for advancing mRNA-based therapies and vaccines.
  • The presented methods offer a pathway for optimizing LNP formulations for therapeutic mRNA delivery.
Keywords:
ApolipoproteinDendritic cellElectroporationLipid nanoparticlesMS2 RNATransfectioneGFP mRNA

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