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Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
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Embryonic stem (ES) cells are undifferentiated pluripotent cells, meaning they can produce any cell type in the body. This gives them tremendous potential in science and medicine since they can generate specific cell types for use in research or to replace body cells lost due to damage or disease.
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Embryonic stem (ES) cells were first discovered in mice in 1981 by Martin Evans. In 1998, James Thomson identified a method to isolate embryonic stem cells from humans. Human embryonic stem cells (hESCs) are obtained from 3-5 day old embryos that remain unused after an in vitro fertilization procedure.
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Stem cells are undifferentiated cells that divide and produce different types of cells. Ordinarily, cells that have differentiated into a specific cell type are post-mitotic—that is, they no longer divide. However, scientists have found a way to reprogram these mature cells so that they “de-differentiate” and return to an unspecialized, proliferative state. These cells are also pluripotent like embryonic stem cells—able to produce all cell types—and are therefore...
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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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Guiding mesenchymal stem cell differentiation using mesoporous silica nanoparticle-based films.

Lea Andrée1, David Barata1, Pichaporn Sutthavas1

  • 1Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, P.O. Box 616, 6200 MD Maastricht, the Netherlands.

Acta Biomaterialia
|July 9, 2019
PubMed
Summary

Mesoporous silica nanoparticles (MSNs) form films that guide stem cell differentiation for bone regeneration. These smart biomaterials deliver drugs like dexamethasone, enhancing tissue formation and offering tunable release for regenerative medicine applications.

Keywords:
Drug deliveryGuided differentiationMesoporous silica nanoparticlesNanoparticle filmSupported lipid bilayers

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Nanotechnology

Background:

  • Developing smart interfaces to guide tissue formation is crucial for regenerative medicine.
  • Nanoparticles offer control over surface properties and timed delivery of biochemical compounds.
  • Mesoporous silica nanoparticles (MSNs) possess advantageous cargo loading and surface functionalization properties.

Purpose of the Study:

  • To design MSN-based films for guiding human mesenchymal stem cell (hMSC) differentiation towards the osteogenic lineage.
  • To investigate the ability of MSN films to support cell adhesion, proliferation, and biomolecule delivery.
  • To explore the modulation of drug release kinetics using surface modifications.

Main Methods:

  • Fabrication of biocompatible MSN-based films.
  • Culturing hMSCs on MSN films and assessing cell adhesion and proliferation.
  • Loading films with dexamethasone (Dex) to stimulate osteogenesis.
  • Analyzing alkaline phosphatase levels and matrix mineralization.
  • Modulating Dex release using supported lipid bilayers.

Main Results:

  • MSN films supported hMSC adhesion and proliferation while enabling biomolecule delivery.
  • Dex-loaded MSN films induced osteogenic differentiation of hMSCs in vitro.
  • Dex delivery from films increased alkaline phosphatase and matrix mineralization compared to free drug.
  • Supported lipid bilayers allowed modulation of Dex release kinetics.

Conclusions:

  • MSN films represent a promising approach for creating biomaterial interfaces with controlled properties.
  • These films offer tunable biomolecule release and surface characteristics to enhance bioactivity.
  • MSN coatings can mimic sequential bioactive factor release for improved tissue regeneration.