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Related Concept Videos

Osteoclasts in Bone Remodeling01:31

Osteoclasts in 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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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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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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

Role of Vitamins in Maintaining Bone Health

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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.
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Modulating osteoclasts with nanoparticles: A path for osteoporosis management?

Helena Rouco1,2, Patricia García-García2,3, Erik Briffault4

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Nanoparticles offer a promising new strategy for treating osteoporosis by modulating osteoclast activity. These tiny particles can decrease bone resorption, potentially improving patient outcomes and adherence to treatment.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Cell Biology

Background:

  • Osteoclasts are key cells in bone remodeling, responsible for resorption.
  • Osteoporosis (OP) involves decreased bone density and increased fracture risk.
  • Current OP treatments face adherence challenges due to efficacy and safety concerns.

Purpose of the Study:

  • To explore the potential of nanoparticles in modulating osteoclast function for osteoporosis management.
  • To review strategies utilizing synthetic and natural nanoparticles for therapeutic intervention in bone resorption.

Main Methods:

  • Review of studies on synthetic nanoparticles for drug delivery and gene regulation targeting osteoclasts.
  • Analysis of natural nanoparticles (extracellular vesicles) in bone homeostasis and their bioengineering potential.
  • Investigation of nanoparticle targeting strategies for enhanced therapeutic effects.

Main Results:

  • Nanoparticles can modulate osteoclast differentiation, activity, apoptosis, and crosstalk with osteoblasts.
  • Synthetic nanoparticles can deliver antiresorptive drugs or regulate osteoclast genes.
  • Natural nanoparticles (extracellular vesicles) show promise as biomimetic drug carriers for osteoclast-targeted therapy.

Conclusions:

  • Controlling osteoclast activity via nanoparticles presents a viable strategy to reduce bone resorption.
  • Nanoparticle-based approaches offer potential for improved and safer osteoporosis management.
  • Further development in nanoparticle design and targeting can enhance therapeutic efficacy for bone diseases.