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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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Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
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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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Bone Cells and Tissue01:30

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Bones contain a relatively small number of cells entrenched in a matrix of organic and inorganic components. Although bone cells compose only a small amount of the bone volume, they are crucial to its function. Four types of cells are found within the bone tissue— osteoblasts, osteocytes, osteogenic cells, and osteoclasts.
Osteoblasts and Osteocytes
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The Effect of Aging on Tissues01:19

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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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Compact Bone01:27

Compact Bone

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
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Related Experiment Video

Updated: Sep 30, 2025

Analysis and Imaging of Osteocytes
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Analysis and Imaging of Osteocytes

Published on: November 29, 2024

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Osteocytes in bone aging: Advances, challenges, and future perspectives.

Jiarui Cui1, Yo Shibata2, Tianmin Zhu1

  • 1School of Rehabilitation and Health Preservation, Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China.

Ageing Research Reviews
|March 14, 2022
PubMed
Summary

Aging bone cells, called osteocytes, show changes affecting bone health. Understanding their molecular mechanisms is key to developing new therapies for age-related bone loss and fractures.

Keywords:
Bone agingOsteocyteOsteocyte transcriptomeOsteocytic mechanismsRNA sequencing

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Area of Science:

  • Bone Biology
  • Gerontology
  • Cellular Mechanisms

Background:

  • Osteocytes are crucial for bone homeostasis and response to mechanical and hormonal stimuli.
  • Aging bone exhibits osteocyte and lacunae morphological changes, implicating osteocytes in bone aging.
  • Aged osteocytes display impaired mechanosensitivity, senescence, and network degeneration.

Purpose of the Study:

  • To review the hallmarks of bone and osteocyte aging.
  • To discuss osteocytic mechanisms contributing to age-related bone loss and quality decline.
  • To explore challenges and solutions in studying osteocyte transcriptomes.

Main Methods:

  • Review of existing literature on osteocyte biology and aging.
  • Analysis of RNA sequencing (RNA-seq) data identifying aging-related genes and pathways.
  • Discussion of single-cell RNA-seq potential for osteocyte research.

Main Results:

  • Identified key molecular pathways (Wnt, Bmp/TGF, Jak-STAT) involved in bone aging.
  • Highlighted roles of inflammation, immune dysfunction, and hormonal changes in osteocyte aging.
  • Demonstrated that single-cell RNA-seq can reveal transcriptomic insights into aged osteocytes.

Conclusions:

  • Understanding osteocyte aging mechanisms provides targets for osteoporosis and fracture therapies.
  • Standardized single-cell RNA-seq protocols are needed for advanced osteocyte research.
  • Osteocyte dysfunction is a significant contributor to age-related bone deterioration.