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Bone Disorders01:29

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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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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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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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Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
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Bones are dynamic organs that require a rich supply of oxygen and nutrients. Around 5% to 10% of the cardiac output supplies blood to the bones. A typical long bone has three main sources: the nutrient artery, the metaphyseal and epiphyseal arteries, and the periosteal arteries.
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Pyroptosis in bone loss.

Xinyi Li1, Ling Ji1, Xinrui Men1

  • 1State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.

Apoptosis : an International Journal on Programmed Cell Death
|January 16, 2023
PubMed
Summary
This summary is machine-generated.

Pyroptosis, a cell death process, contributes to bone loss in metabolic diseases. Understanding its mechanisms in key bone cells offers potential therapeutic targets for bone loss treatment.

Keywords:
Bone lossInflammasomeNLRP3OsteoclastPyroptosis

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Area of Science:

  • Cell Biology
  • Bone Metabolism
  • Immunology

Background:

  • Pyroptosis is implicated in bone loss associated with metabolic diseases.
  • Osteoclasts, osteoblasts, macrophages, chondrocytes, and periodontal/gingival cells are potentially involved.
  • The precise mechanisms linking pyroptosis to bone loss remain unclear.

Purpose of the Study:

  • To review cells involved in pyroptosis-associated bone loss.
  • To summarize the role of these cells in bone metabolism during pyroptosis.
  • To discuss therapeutic strategies targeting pyroptosis for bone loss.

Main Methods:

  • Literature review of pyroptosis and bone metabolism.
  • Analysis of cellular mechanisms in pyroptosis-related bone loss.
  • Discussion of clinical implications and challenges.

Main Results:

  • Identified key cell types (osteoclasts, osteoblasts, macrophages, chondrocytes, periodontal/gingival cells) in pyroptosis-driven bone loss.
  • Elucidated the roles of these cells in bone metabolism during pyroptosis.
  • Highlighted the potential of targeting pyroptosis pathways for therapeutic intervention.

Conclusions:

  • Pyroptosis significantly impacts bone metabolism and contributes to bone loss.
  • Targeting pyroptosis in specific cell types presents a promising therapeutic avenue for bone metabolic diseases.
  • Further research is needed to overcome challenges in developing effective and safe treatments.