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Related Concept Videos

The Bone Matrix01:18

The Bone Matrix

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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 tissue forms the internal skeleton of vertebrate animals, providing structure to the body.
Bone Matrix
Bone, or osseous tissue, is a connective tissue that has a large amount of two different types of matrix material. The organic matrix is similar to the matrix material found in other connective tissues, including some amount of collagen and elastic fibers. This gives strength and flexibility to the tissue. The inorganic matrix consists of mineral salts— mostly calcium salts—...
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Compact Bone01:27

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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.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
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Spongy Bone01:09

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All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
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Matrix Proteoglycans and Glycoproteins01:21

Matrix Proteoglycans and Glycoproteins

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Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
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Bone Remodeling01:40

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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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Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model
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Biglycan in the Skeleton.

Vardit Kram1, Reut Shainer1, Priyam Jani1

  • 1Molecular Biology of Bones and Teeth Section, National Institutes of Dental and Craniofacial Research, National Institutes of Health, U.S. Department of Health & Human Services, Bethesda, Maryland.

The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society
|July 7, 2020
PubMed
Summary
This summary is machine-generated.

Small leucine-rich proteoglycans (SLRPs), like Biglycan, are crucial for skeletal tissues. This review explores Biglycan

Keywords:
extracellular matrixglycosaminoglycanproteoglycan

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Area of Science:

  • Skeletal Biology
  • Proteoglycan Research
  • Biochemistry

Background:

  • Small leucine-rich proteoglycans (SLRPs) are vital components in various biological systems.
  • Biglycan is a prominent member of the SLRP family with known roles in tissue development and maintenance.
  • Understanding SLRPs' functions in the skeleton is critical for comprehending bone and cartilage health.

Purpose of the Study:

  • To comprehensively review the multifaceted roles of Biglycan and related SLRPs within the mineralizing tissues of the skeleton.
  • To elucidate Biglycan's specific functions in structural biology, cellular signaling, and skeletal homeostasis.
  • To explore Biglycan's involvement in craniofacial development, long bone growth, and skeletal tissue remodeling.

Main Methods:

  • Literature review of existing research on Biglycan and SLRPs in skeletal tissues.
  • Analysis of studies focusing on Biglycan's impact on structural biology and signaling pathways.
  • Examination of genetic studies linking Biglycan to skeletal development and human genetic disorders.

Main Results:

  • Biglycan influences structural biology, cellular signaling, and homeostasis in both craniofacial and long bones.
  • The protein plays a role in remodeled skeletal tissues and is implicated in human genetic conditions affecting the skeleton.
  • Numerous skeletal cell types are now understood to be influenced by Biglycan's presence and function.

Conclusions:

  • Biglycan is a key regulator in skeletal biology, impacting structural integrity, signaling, and homeostasis.
  • Further research is needed to fully understand the intricate mechanisms of Biglycan's action(s) in the skeleton.
  • Biglycan's diverse roles highlight its importance in skeletal health and disease, with implications for human genetics.