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Related Concept Videos

The Bone Matrix01:18

The Bone Matrix

Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in acid or...
Bone Remodeling01:40

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
Bone Formation by Intramembranous Ossification01:29

Bone Formation by Intramembranous Ossification

Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
Bone as Supporting Connective Tissue01:23

Bone as Supporting Connective Tissue

Bone tissue forms the internal skeleton of vertebrate animals, providing structure to the body.
Bone Matrix
Bone, or osseous tissue, is a connective tissue that has a large amount of two different types of matrix material. The organic matrix is similar to the matrix material found in other connective tissues, including some amount of collagen and elastic fibers. This gives strength and flexibility to the tissue. The inorganic matrix consists of mineral salts— mostly calcium salts— that give the...
The Extracellular Matrix01:42

The Extracellular Matrix

Overview

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Integrated Bone Formation Through In Vivo Endochondral Ossification Using Mesenchymal Stem Cells
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The poor osteoinductive capability of human acellular bone matrix.

Yi-Zhou Huang1, Jia-Qin Cai, Jing Xue

  • 1Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy and Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, P R China.

The International Journal of Artificial Organs
|October 16, 2012
PubMed
Summary

Human acellular cancellous bone matrix (ACBM) shows structural bone features but limited osteoinductivity. However, ACBM supports mesenchymal stem cell growth and preserves their undifferentiated state, offering insights for bone regeneration strategies.

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Isolation of Human Mesenchymal Stem Cells and their Cultivation on the Porous Bone Matrix
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Isolation of Human Mesenchymal Stem Cells and their Cultivation on the Porous Bone Matrix

Published on: February 9, 2015

Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Orthopedic Research

Background:

  • Demineralized bone matrix (DBM) is widely used for bone regeneration due to osteoinductivity and osteoconductivity.
  • The demineralization process is thought crucial for osteoinductivity, yet the osteoinductivity of acellular bone matrix (ACBM) is understudied.

Purpose of the Study:

  • To evaluate the osteoinductive potential of human ACBM in a rat subcutaneous implantation model.
  • To investigate the growth and osteogenic differentiation of rat bone marrow-derived mesenchymal stem cells (rBM-MSCs) cultured on ACBM.

Main Methods:

  • Human ACBM was prepared without demineralization, characterized by its porous structure.
  • ACBM was subcutaneously implanted in rats for 4 months.
  • rBM-MSCs were seeded onto ACBM and cultured for 28 days to assess cell growth and osteogenic differentiation markers.

Main Results:

  • Subcutaneous implantation of ACBM resulted in osteoid formation but not mature bone.
  • rBM-MSCs exhibited good growth and stable morphology on ACBM.
  • No mineralized nodule formation was observed, and osteogenic gene expression significantly decreased in cultured rBM-MSCs.

Conclusions:

  • Human ACBM possesses native bone structural characteristics but demonstrates poor osteoinductivity.
  • ACBM effectively supports rBM-MSC growth and maintains their undifferentiated phenotype.
  • These findings enhance understanding of ACBM applications in bone regeneration and stem cell niche engineering.