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Stem Cell Therapy for Tissue Regeneration01:21

Stem Cell Therapy for Tissue Regeneration

Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
Types of Stem Cells used in Stem Cell Therapy
The two main cell types that...
Bone Marrow Sampling and Transplants01:22

Bone Marrow Sampling and Transplants

Bone marrow transplant is a potential cure for several diseases, including cancer and specific genetic disorders. Notably, this procedure is applicable for patients suffering from aplastic anemia, certain types of leukemia, severe combined immunodeficiency disease (SCID), Hodgkin's disease, non-Hodgkin's lymphoma, multiple myeloma, thalassemia, sickle-cell disease, and certain cancers.
The transplant begins with high doses of chemotherapy and radiation treatment, which aim to destroy the...

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Related Experiment Video

Updated: Jul 27, 2026

Synthesis of Thermogelling PolyN-isopropylacrylamide-graft-chondroitin Sulfate Composites with Alginate Microparticles for Tissue Engineering
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Injectable Dendritic Hydrogels Curable by High-Energy Visible Light for Cell Delivery in Bone Regeneration.

Noemi Molina1, Francesco Torelli2, Samih Mohamed-Ahmed2

  • 1Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-68, 100 44 Stockholm, Sweden.

Chemistry of Materials : a Publication of the American Chemical Society
|May 19, 2025
PubMed
Summary

Injectable hydrogels using dendritic copolymers offer a promising new scaffold for bone regeneration. These biomaterials support bone marrow mesenchymal stem cells (BMSCs) and show potential for advanced regenerative medicine applications.

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Tissue Engineering

Background:

  • Bone marrow mesenchymal stem cells (BMSCs) loaded hydrogels are promising for bone regeneration.
  • Grafting methods have limitations for critical-sized bone defects.
  • Injectable scaffolds offer advantages for in situ bone repair.

Purpose of the Study:

  • To develop an injectable bone scaffold hydrogel using high-energy visible light-induced thiol-ene coupling (TEC).
  • To investigate the properties and cytocompatibility of dendritic copolymer-based hydrogels for bone regeneration.
  • To evaluate the potential of these hydrogels as versatile soft biomaterials for regenerative medicine.

Main Methods:

  • Constructed branched allyl-functionalized dendritic-linear-dendritic (DLD) copolymers from PEG and bis-MPA.
  • Formulated injectable hydrogels using DLD copolymers and thiolated cross-linkers, cured via HEV light-induced TEC.
  • Assessed hydrogel stability, swelling, modulus, in vitro cytocompatibility with BMSCs, and calcium deposition.

Main Results:

  • Hydrogel properties (stability, swelling, modulus) were tunable by varying DLD generation and cross-linker characteristics.
  • The hydrogel platform demonstrated excellent BMSC viability and interactions, comparable to GelMA.
  • Optimal hydrogels showed similar cell metabolic activity to GelMA and significant calcium deposition in osteogenic medium, with high functionalization capacity.

Conclusions:

  • bis-MPA-based dendritic hydrogels represent a versatile platform for injectable bone scaffolds.
  • The HEV light-cured TEC chemistry enables facile in situ gel formation.
  • These hydrogels show significant potential for regenerative medicine applications, including bone tissue engineering.