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Related Concept Videos

Mesenchymal Stem Cells01:19

Mesenchymal Stem Cells

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 access...
Growth of Cartilage and Bone Tissue01:27

Growth of Cartilage and Bone Tissue

Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...

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Related Experiment Video

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3D Hydrogel Scaffolds for Articular Chondrocyte Culture and Cartilage Generation
12:37

3D Hydrogel Scaffolds for Articular Chondrocyte Culture and Cartilage Generation

Published on: October 7, 2015

Cartilage tissue engineering: From hydrogel to mesenchymal stem cells.

C Merceron1, S Portron, M Masson

  • 1INSERM U791, LIOAD, Group STEP, Nantes University, Nantes Cedex 1, France.

Bio-Medical Materials and Engineering
|October 9, 2010
PubMed
Summary

Injectable hydrogels combined with adipose tissue-derived stem cells (ATSCs) show promise for cartilage repair. Pre-differentiating ATSCs in vitro enhances in vivo cartilage formation, offering a potential solution for articular cartilage defects.

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Area of Science:

  • Biomaterials Science
  • Stem Cell Biology
  • Regenerative Medicine

Background:

  • Articular cartilage has limited self-repair capacity, necessitating strategies for cartilage regeneration.
  • Adipose tissue-derived stem cells (ATSCs) offer a viable cell source for cartilage repair.
  • Injectable hydrogels, such as self-setting cellulose-based hydrogels (Si-HPMC), provide a promising delivery vehicle for cell-based therapies.

Purpose of the Study:

  • To investigate the impact of in vitro chondrogenic differentiation of ATSCs on in vivo cartilage formation within an Si-HPMC hydrogel.
  • To optimize culture conditions for chondrogenic differentiation of ATSCs.
  • To assess the phenotypic stability of pre-differentiated ATSCs.

Main Methods:

  • Characterization of ATSCs for stem cell properties (proliferation, self-renewal, surface markers).
  • Evaluation of ATSC chondrogenic differentiation potential under various culture conditions (3D culture, hypoxia).
  • Analysis of gene expression (real-time RT-PCR) and protein production (histology for glycosaminoglycans and type II collagen).
  • Assessment of terminal differentiation markers and alkaline phosphatase activity.
  • In vivo implantation of ATSC/Si-HPMC constructs for histological evaluation.

Main Results:

  • 3D culture and hypoxic conditions significantly enhanced ATSC chondrogenesis, evidenced by increased mRNA expression and protein production of chondrogenic markers.
  • The optimized in vitro culture conditions promoted chondrogenesis while preventing terminal differentiation of ATSCs.
  • Histological analysis of in vivo implants demonstrated successful formation of cartilaginous tissue from in vitro pre-differentiated ATSCs within the Si-HPMC hydrogel.

Conclusions:

  • In vitro chondrogenic pre-commitment of ATSCs, even in monolayer, is sufficient to promote cartilaginous tissue formation in vivo when combined with Si-HPMC.
  • This approach holds potential for developing effective cell-based therapies for articular cartilage repair.
  • Optimized culture conditions are crucial for enhancing stem cell differentiation and therapeutic efficacy in regenerative medicine applications.