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Related Concept Videos

Essential Minerals for Bone Health01:31

Essential Minerals for Bone Health

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The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
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Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
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Roles of Electrolytes: Calcium and Phosphate01:27

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Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
The calcium concentration in blood plasma is primarily...
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The Bone Matrix01:18

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Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in...
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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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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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Harnessing Immunomodulation: How Calcium Phosphate Biomaterials Orchestrate Bone Regeneration.

Mengyuan Zhang1, Ben Wan2, Mouyuan Sun1

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Tissue Engineering. Part A
|June 24, 2025
PubMed
Summary

Calcium phosphate (CaP) biomaterials are crucial for bone healing but need enhanced osteoinductivity. Understanding immune responses to CaPs is key to improving bone regeneration strategies.

Keywords:
bone regenerationcalcium phosphateimmunomodulationmacrophage

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Area of Science:

  • Biomaterials Science
  • Immunology
  • Regenerative Medicine

Background:

  • The immune system and biomaterials have a synergistic relationship vital for bone defect healing.
  • Calcium phosphate (CaP) biomaterials like hydroxyapatite are osteoconductive bone substitutes.
  • Enhancing the osteoinductive potential of synthetic CaPs remains a significant challenge.

Purpose of the Study:

  • To analyze recent advances in immune cell responses to CaPs during bone healing.
  • To deepen the understanding of immunomodulatory strategies for enhanced bone regeneration.
  • To identify knowledge gaps for developing advanced CaPs in bone tissue engineering.

Main Methods:

  • Systematic review of molecular mechanisms of immune cell responses to CaPs.
  • Analysis of physical and biochemical properties influencing host immune response.
  • Evaluation of immunomodulatory strategies for bone regeneration.

Main Results:

  • Host immune response to CaPs is complex and influenced by material properties.
  • Immunomodulatory strategies can bridge inflammation and osteogenesis for better bone healing.
  • Understanding immune cell interactions is critical for CaP biomaterial development.

Conclusions:

  • Harnessing immunomodulation is essential for improving CaP biomaterials in bone regeneration.
  • Further research into immune responses can guide the design of novel CaPs.
  • Spatiotemporally responsive CaPs hold promise for future bone tissue engineering applications.