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Related Concept Videos

Bone Formation by Endochondral Ossification01:24

Bone Formation by Endochondral Ossification

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Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...
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Epigenetic Regulation01:46

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Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Epigenetic Regulation01:37

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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
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Bone Formation by Intramembranous Ossification01:29

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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.
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Growth of Cartilage and Bone Tissue01:27

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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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Dynamic Equilibrium02:20

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A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
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Related Experiment Video

Updated: Feb 4, 2026

Culture of Murine Embryonic Metatarsals: A Physiological Model of Endochondral Ossification
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Epigenetic dynamic during endochondral ossification and articular cartilage development.

Lyess Allas1, Karim Boumédiene1, Catherine Baugé1

  • 1Normandie Univ, UNICAEN, EA7451 BioConnecT, Caen, France.

Bone
|October 9, 2018
PubMed
Summary

Epigenetic factors like DNA methylation, histone modifications, and non-coding RNAs are key regulators of embryonic development. This review details their crucial roles in endochondral ossification and cartilage formation.

Keywords:
CartilageChondrogenesisDNA methylationEndochondral ossificationEpigeneticsGene regulationHistone methylationlncRNAmiRNA

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Area of Science:

  • Developmental Biology
  • Epigenetics
  • Skeletal Biology

Background:

  • Epigenetics profoundly influences cellular processes, including embryonic and fetal development.
  • Epigenetic mechanisms are critical for skeletal development, specifically endochondral ossification and chondrogenesis.

Purpose of the Study:

  • To review recent discoveries on epigenetic regulation of endochondral ossification and chondrogenesis.
  • To highlight the roles of DNA methylation, histone modifications, and non-coding RNAs in bone and cartilage formation.

Main Methods:

  • Literature review of recent scientific discoveries.
  • Synthesis of current knowledge on epigenetic mechanisms in skeletal development.

Main Results:

  • DNA methylation patterns are essential for regulating gene expression during skeletal development.
  • Histone post-translational modifications dynamically control chromatin accessibility, impacting chondrogenesis.
  • Non-coding RNAs, including microRNAs (miRNAs) and long non-coding RNAs (lncRNAs), are integral to the epigenetic control of endochondral ossification.

Conclusions:

  • Epigenetic factors are fundamental regulators of endochondral ossification and chondrogenesis.
  • Understanding these epigenetic mechanisms provides insights into skeletal development and potential therapeutic targets.