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Related Concept Videos

Hormones and Bone Tissue01:17

Hormones and Bone Tissue

The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
TGF - β Signaling Pathway01:16

TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Diversity in Cell Signaling Responses01:22

Diversity in Cell Signaling Responses

The physiological function of a cell and cellular communication are outcomes of a range of extrinsic signals, intracellular signaling pathways, and cellular responses. No two cell types express the same repertoire of signaling components. Receptors are highly selective for their cognate ligands, but once activated, they can alter multiple cellular processes such as DNA transcription, protein synthesis, and metabolic activity. 
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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.
Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...

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Related Experiment Video

Updated: Jun 19, 2026

Stimulation of Notch Signaling in Mouse Osteoclast Precursors
08:01

Stimulation of Notch Signaling in Mouse Osteoclast Precursors

Published on: February 28, 2017

Signaling pathways governing osteoblast proliferation, differentiation and function.

J F L Chau1, W F Leong, B Li

  • 1The Institute of Molecular and Cell Biology, Singapore, Republic of Singapore.

Histology and Histopathology
|October 2, 2009
PubMed
Summary
This summary is machine-generated.

Osteoblasts, the bone-building cells, originate from mesenchymal stem cells. This review details signaling pathways controlling osteoblast function and gene expression for bone remodeling.

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Osteoclast Derivation from Mouse Bone Marrow
06:17

Osteoclast Derivation from Mouse Bone Marrow

Published on: November 6, 2014

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Last Updated: Jun 19, 2026

Stimulation of Notch Signaling in Mouse Osteoclast Precursors
08:01

Stimulation of Notch Signaling in Mouse Osteoclast Precursors

Published on: February 28, 2017

Osteoclast Derivation from Mouse Bone Marrow
06:17

Osteoclast Derivation from Mouse Bone Marrow

Published on: November 6, 2014

Area of Science:

  • Cell Biology
  • Biochemistry
  • Orthopedics

Background:

  • Osteoblasts are crucial for bone growth and remodeling.
  • They differentiate from bone marrow mesenchymal stem cells.
  • Osteoblastogenesis is influenced by hormones, growth factors, and mechanical stress.

Purpose of the Study:

  • To review signaling pathways governing osteoblast homeostasis.
  • To elucidate how signaling regulates gene expression and cell fate.

Main Methods:

  • Literature review of signaling pathways in osteoblastogenesis.
  • Analysis of gene expression regulation by signaling events.

Main Results:

  • Identification of key signaling pathways controlling osteoblast differentiation and function.
  • Understanding the link between external cues, signal transduction, and gene expression in osteoblasts.

Conclusions:

  • Signaling pathways are central to osteoblast fate determination.
  • Further research into these pathways can inform bone disease treatments.