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Related Experiment Video

Updated: May 26, 2025

Synthesis of Thermogelling PolyN-isopropylacrylamide-graft-chondroitin Sulfate Composites with Alginate Microparticles for Tissue Engineering
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Injectable Endoplasmin-Loaded Lipid Nanoparticles-Hydrogel Composite for Cartilage Regeneration.

Sumi Choi1, Hyeongrok Choi2, Jin Woong Chung2

  • 1Department of Chemical Engineering (BK21 FOUR), Dong-A University, Busan, 49315, Republic of Korea.

Tissue Engineering and Regenerative Medicine
|February 24, 2025
PubMed
Summary

This study developed cationic lipid nanoparticles (C_LNPs) to deliver endoplasmin (ENPL) for enhanced cartilage regeneration. The ENPL-loaded C_LNPs effectively promoted chondrogenic differentiation in stem cells and cartilage tissue engineering.

Keywords:
Cationic liposomeChondrogenesisEndoplasminInjectable hydrogel

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Stem Cell Biology

Background:

  • Endoplasmin (ENPL) promotes chondrogenesis but faces delivery challenges due to its size.
  • Cationic lipid nanoparticles (C_LNPs) were engineered for enhanced intracellular delivery of ENPL.
  • Human tonsil-derived mesenchymal stem cells (hTMSCs) were utilized to assess ENPL's therapeutic potential.

Purpose of the Study:

  • To develop a novel system for efficient intracellular delivery of endoplasmin (ENPL).
  • To evaluate the efficacy of ENPL-loaded C_LNPs in promoting chondrogenic differentiation of hTMSCs.
  • To assess the potential of ENPL-C_LNPs within an injectable hydrogel for cartilage tissue engineering.

Main Methods:

  • Synthesis of ENPL-loaded C_LNPs for intracellular protein delivery.
  • In vitro assessment of delivery efficiency and cytotoxicity in hTMSCs.
  • Incorporation of ENPL-C_LNPs into a hyaluronic acid/chondroitin sulfate hydrogel for in vivo testing in a mouse model.

Main Results:

  • ENPL-C_LNPs demonstrated over 80% intracellular delivery efficiency with no observed cytotoxicity.
  • Co-cultured hTMSCs showed increased glycosaminoglycans (GAGs) and collagen expression over 21 days.
  • In vivo studies confirmed stable cartilage differentiation with abundant cartilage-specific lacunae formation in regenerated tissue.

Conclusions:

  • The combination of ENPL-C_LNPs and an injectable hydrogel scaffold effectively supports chondrogenic differentiation.
  • This strategy presents a promising approach for advancing cartilage tissue engineering.
  • Enhanced intracellular delivery of ENPL via C_LNPs is crucial for therapeutic efficacy in cartilage regeneration.