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Related Concept Videos

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...
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...

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Humic Acid Derived from Vermicompost Improves Bone Mineral Content and Alters Oxidative Stress Markers in Ovariectomized Mice.

Biomedicines·2025

Related Experiment Video

Updated: Jun 27, 2026

Estrogen-Like Effect of Bazi Bushen Capsule in Ovariectomized Rats
08:56

Estrogen-Like Effect of Bazi Bushen Capsule in Ovariectomized Rats

Published on: April 7, 2023

Humic Acid Therapy Mitigates Estrogen Deficiency-Induced Alveolar Bone Loss and Modulates the RANKL/OPG Balance.

Larissa Vieira Toledo1, Maíra Gabrielle de Abreu Ribeiro1, Thays Cristina Dos Santos1

  • 1Faculty of Health Sciences, Universidade Federal de Lavras (UFLA), Lavras 37200-000, Minas Gerais, Brazil.

Biomedicines
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

Humic acids (HAs) show promise in protecting alveolar bone during estrogen deficiency. This study found HAs improved bone mineral content and reduced bone loss in an ovariectomized mouse model.

Keywords:
alveolar bonebone resorptionestrogen depletionhumic substancesnatural products

Related Experiment Videos

Last Updated: Jun 27, 2026

Estrogen-Like Effect of Bazi Bushen Capsule in Ovariectomized Rats
08:56

Estrogen-Like Effect of Bazi Bushen Capsule in Ovariectomized Rats

Published on: April 7, 2023

Area of Science:

  • Biochemistry
  • Oral Biology
  • Pharmacology

Background:

  • Estrogen deficiency disrupts bone remodeling, negatively impacting alveolar bone.
  • Humic acids (HAs) possess antioxidant and anti-inflammatory properties, potentially mitigating bone resorption.

Purpose of the Study:

  • To investigate the effects of HAs on alveolar bone in an experimental model of estrogen depletion.

Main Methods:

  • Ovariectomized (OVX) and sham-operated mice received daily oral HA or placebo for 28 days.
  • Mandibles were analyzed for structural, mineral, and histological changes.
  • Bone elemental composition, alveolar bone loss, RANKL/OPG expression, and osteoclast activity were assessed.

Main Results:

  • OVX induced bone loss, reduced calcium/phosphorus, increased RANKL, and elevated osteoclast numbers.
  • HA treatment in OVX mice increased bone mineral content and attenuated alveolar bone loss.
  • HAs partially increased osteoprotegerin (OPG) and reduced the RANKL/OPG ratio.

Conclusions:

  • Humic acid therapy attenuated alveolar bone resorption in estrogen-deficient mice.
  • HA's protective effects may involve modulating the RANKL/OPG balance.