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Related Concept Videos

Essential Minerals for Bone Health01:31

Essential Minerals for Bone Health

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.
Calcium and Phosphorus
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...
Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
The Early Endosome: Endocytosis of Transferrin01:28

The Early Endosome: Endocytosis of Transferrin

Essential proteins such as insulin or low-density lipoprotein (LDL) and micronutrients such as iron enter a eukaryotic cell through receptor-mediated endocytosis. Subsequently, the early endosomes fuse with the vesicles containing such receptor-ligand complexes and play a vital role in sorting the incoming ligands and receptors. While the ligands are either degraded inside the vesicle or released into the cytosol, their receptors are returned to the plasma membrane for further rounds of...
Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

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 bone...
Skeleton and Calcium Homeostasis01:21

Skeleton and Calcium Homeostasis

Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
The Bone Matrix01:18

The Bone Matrix

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 acid or...

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Related Experiment Video

Updated: Jun 15, 2026

Laser Capture Microdissection of Mouse Embryonic Cartilage and Bone for Gene Expression Analysis
09:20

Laser Capture Microdissection of Mouse Embryonic Cartilage and Bone for Gene Expression Analysis

Published on: December 18, 2019

Lactoferrin as an effector molecule in the skeleton.

Jillian Cornish1, Dorit Naot

  • 1Department of Medicine, University of Auckland, Private Bag 92019, Auckland, New Zealand. j.cornish@auckland.ac.nz

Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
|March 17, 2010
PubMed
Summary
This summary is machine-generated.

Lactoferrin promotes bone growth by stimulating bone-forming cells and inhibiting bone-resorbing cells. This protein shows promise as a therapeutic for osteoporosis and improving bone health.

Related Experiment Videos

Last Updated: Jun 15, 2026

Laser Capture Microdissection of Mouse Embryonic Cartilage and Bone for Gene Expression Analysis
09:20

Laser Capture Microdissection of Mouse Embryonic Cartilage and Bone for Gene Expression Analysis

Published on: December 18, 2019

Area of Science:

  • Biochemistry
  • Cell Biology
  • Orthopedics

Background:

  • Lactoferrin, a pleiotropic protein, exhibits antimicrobial and immunomodulatory effects.
  • Emerging research highlights lactoferrin's role in skeletal health, promoting bone growth.

Purpose of the Study:

  • To investigate lactoferrin's effects on bone cells and its underlying mechanisms.
  • To explore lactoferrin's potential as a therapeutic agent for bone disorders.

Main Methods:

  • Studied lactoferrin's impact on osteoblast proliferation, differentiation, and survival.
  • Investigated lactoferrin's effect on osteoclastogenesis.
  • Analyzed signaling pathways (LRP1, MAPK, PI3K/Akt) and gene expression (IGF1, Ptgs2, Nfatc1) in osteoblasts.

Main Results:

  • Lactoferrin stimulates osteoblast activity and survival, while inhibiting osteoclastogenesis, leading to increased bone volume.
  • In vivo studies demonstrated significant bone area increases following local lactoferrin injection.
  • Lactoferrin's mitogenic effects in osteoblasts are mediated by LRP1, activating MAPK and PI3K/Akt pathways.

Conclusions:

  • Lactoferrin is a positive regulator of bone, potentially playing a physiological role in bone growth and healing.
  • Dietary lactoferrin supplementation has improved bone mineral density and strength in studies.
  • Lactoferrin presents a promising therapeutic candidate for osteoporosis and bone health improvement.