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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...
Role of Vitamins in Maintaining Bone Health01:25

Role of Vitamins in Maintaining Bone Health

The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
Bone Disorders01:29

Bone Disorders

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.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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...
Bone Remodeling01:40

Bone Remodeling

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.
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...

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Olive polyphenol hydroxytyrosol prevents bone loss.

Keitaro Hagiwara1, Tadashi Goto, Masahiro Araki

  • 1Department of Biological Sciences, Tokyo Institute of Technology, Midori-ku, Yokohama, Japan.

European Journal of Pharmacology
|May 5, 2011
PubMed
Summary
This summary is machine-generated.

Olive polyphenols, oleuropein and hydroxytyrosol, promote bone formation and inhibit bone loss. These compounds show potential for treating osteoporosis symptoms by supporting bone health.

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Area of Science:

  • Biochemistry
  • Bone Biology
  • Pharmacology

Background:

  • Polyphenols are known for physiological effects against various diseases.
  • Olive polyphenols like oleuropein, hydroxytyrosol, and tyrosol are key compounds with potential health benefits.
  • Osteoporosis is a significant health concern characterized by bone loss.

Purpose of the Study:

  • To investigate the effects of major olive polyphenols on bone formation and loss.
  • To evaluate the impact of oleuropein, hydroxytyrosol, and tyrosol on osteoblasts and osteoclasts.
  • To assess the efficacy of these polyphenols in preventing bone loss in an ovariectomized mouse model.

Main Methods:

  • In vitro studies using cultured osteoblasts (MC3T3-E1) and osteoclasts.
  • Assessment of osteoblast proliferation, type I collagen production, alkaline phosphatase activity, and calcium deposition.
  • Evaluation of osteoclast formation inhibition.
  • In vivo studies using ovariectomized mice to measure bone loss in femurs.
  • Measurement of hydrogen peroxide (H2O2) levels in osteoblasts.

Main Results:

  • Oleuropein and hydroxytyrosol stimulated calcium deposition in osteoblasts dose-dependently.
  • These polyphenols inhibited osteoclast formation at specific concentrations.
  • Both compounds suppressed trabecular bone loss in ovariectomized mice.
  • Hydroxytyrosol reduced H2O2 levels in osteoblasts.

Conclusions:

  • Olive polyphenols, particularly oleuropein and hydroxytyrosol, significantly impact bone formation and maintenance.
  • These compounds demonstrate therapeutic potential for managing osteoporosis symptoms.
  • Further research into olive polyphenols could lead to novel osteoporosis treatments.