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Related Concept Videos

Bone Remodeling01:40

Bone Remodeling

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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.
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Combining two or more treatment methods increases the life span of cancer patients while reducing damage to vital organs or tissue from the overuse of a single treatment. Combination therapy also targets different cancer-inducing pathways, thus reducing the chances of developing resistance to treatment.
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Osteoclasts in Bone Remodeling01:31

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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...
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Hormones and Bone Tissue01:17

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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.
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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...
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Osteomorphs as a tool for personalized medicine.

Guillaume Mabilleau1, Hélène Libouban2, Valérie Geoffroy3

  • 1Univ Angers, GEROM, SFR ICAT, F-49000 Angers, France; CHU Angers, Bone Pathology, F-49933 Angers, France.

Trends in Endocrinology and Metabolism: TEM
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Researchers discovered osteomorphs, novel cells formed by osteoclast fission. These distinct cells may play a role in various human bone diseases, offering new insights into skeletal pathologies.

Keywords:
bone resorptionosteoclastosteomorphs

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Area of Science:

  • Cell Biology
  • Skeletal Biology
  • Genomics

Background:

  • Osteoclasts are critical for bone resorption.
  • Dynamic cellular mechanisms in bone remodeling are not fully understood.
  • The origin and function of specific cell types in bone disease require further investigation.

Purpose of the Study:

  • To investigate novel osteoclast-related dynamic mechanisms.
  • To characterize newly identified motile, fusion-competent cells called osteomorphs.
  • To explore the potential role of osteomorphs in human bone diseases.

Main Methods:

  • Utilized single-cell RNA sequencing (scRNA-seq) to analyze cell populations.
  • Investigated cellular fission as a mechanism for osteomorph formation.
  • Compared transcriptional profiles of osteomorphs with osteoclasts and macrophages.

Main Results:

  • Identified osteomorphs as distinct cells generated through osteoclast fission.
  • Demonstrated that osteomorphs are transcriptionally unique compared to osteoclasts and macrophages.
  • Found evidence suggesting osteomorphs' potential involvement in bone diseases.

Conclusions:

  • Osteoclasts can undergo fission to produce osteomorphs, a novel cell type.
  • Osteomorphs possess a distinct transcriptional signature.
  • Osteomorphs may represent a new cellular factor in the pathogenesis of human bone diseases.