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Related Concept Videos

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.
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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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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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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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Related Experiment Video

Updated: Dec 18, 2025

Analysis of Minerals Produced by hFOB 1.19 and Saos-2 Cells Using Transmission Electron Microscopy with Energy Dispersive X-ray Microanalysis
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Alkaline phosphatase: Structure, expression and its function in bone mineralization.

Selvaraj Vimalraj1

  • 1Centre for Biotechnology, Anna University, Chennai 600 025, Tamil Nadu, India.

Gene
|June 12, 2020
PubMed
Summary

Alkaline phosphatase (ALP) is crucial for bone mineralization by increasing phosphate and reducing inhibitors. Reviewing ALP status offers insights into bone formation and potential treatments for bone diseases.

Keywords:
ALPBone mineralizationHydroxyapatiteHypophosphatasiaTNAP

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Mineralized Tissue Biology

Background:

  • Alkaline phosphatase (ALP) is vital for hard tissue formation, particularly mineralization.
  • ALP facilitates mineralization by increasing local inorganic phosphate and decreasing extracellular pyrophosphate, an inhibitor.
  • Tissue-nonspecific isozyme of ALP (TNAP) is key in bone calcification, hydrolyzing pyrophosphate to supply phosphate.

Purpose of the Study:

  • To review the critical role of alkaline phosphatase (ALP) in mineralization.
  • To elucidate the function of TNAP in bone calcification and its substrates.
  • To highlight the implications of ALP expression for understanding bone formation and disease.

Main Methods:

  • Literature review on alkaline phosphatase function in mineralization.
  • Analysis of TNAP's role in bone, liver, and kidney.
  • Examination of biochemical substrates and their relation to hypophosphatasia.

Main Results:

  • ALP increases local inorganic phosphate, aiding hydroxyapatite crystal formation in matrix vesicles.
  • TNAP, a key ALP isoform, is essential for bone calcification by supplying inorganic phosphate.
  • Deficiency in TNAP leads to hypophosphatasia due to substrate accumulation.

Conclusions:

  • Understanding ALP expression and function provides critical insights into bone formation mechanisms.
  • Further study of ALP offers potential therapeutic strategies for bone-related diseases.
  • TNAP's role in mineralization and its substrates are key areas for research in bone health.