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Related Concept Videos

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 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...
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.
Introduction to the Skeletal System01:20

Introduction to the Skeletal System

The skeletal system is the central framework of the body, consisting of different connective tissues: bones, cartilage, tendons, and ligaments.
Components of the Skeletal System
Bone, or osseous tissue, is a hard connective tissue that forms an internal support structure for the human body. Bones shield vulnerable organs and soft tissue from external forces. For example, the vertebral bones protect and support the spinal cord.
Cartilage, a semi-rigid connective tissue found in regions such as...
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.
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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Related Experiment Video

Updated: May 22, 2026

A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders
11:47

A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders

Published on: June 8, 2014

Estrogen and the skeleton.

Sundeep Khosla1, Merry Jo Oursler, David G Monroe

  • 1Endocrine Research Unit and Kogod Center on Aging, Mayo Clinic and Foundation, Rochester, MN 55905, USA. khosla.sundeep@mayo.edu

Trends in Endocrinology and Metabolism: TEM
|May 19, 2012
PubMed
Summary
This summary is machine-generated.

Estrogen is crucial for bone health, regulating metabolism and preventing bone loss. Understanding its direct cellular effects offers new osteoporosis treatment strategies.

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Estrogen-Like Effect of Bazi Bushen Capsule in Ovariectomized Rats
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Estrogen-Like Effect of Bazi Bushen Capsule in Ovariectomized Rats

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Related Experiment Videos

Last Updated: May 22, 2026

A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders
11:47

A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders

Published on: June 8, 2014

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:

  • Endocrinology
  • Bone Biology
  • Metabolism

Background:

  • Estrogen is a primary regulator of bone metabolism in both sexes.
  • Estrogen deficiency leads to increased bone resorption and a formation-resorption imbalance.
  • Estrogen's protective effects on bone are of significant scientific interest.

Purpose of the Study:

  • To elucidate the mechanisms by which estrogen protects bone.
  • To understand estrogen's direct and indirect effects on bone cells.
  • To explore novel therapeutic targets for osteoporosis.

Main Methods:

  • Review of existing literature on estrogen and bone metabolism.
  • Analysis of cellular pathways involved in estrogen signaling.
  • Examination of estrogen's impact on osteoblasts, osteoclasts, and osteocytes.

Main Results:

  • Estrogen directly influences osteocytes, osteoclasts, and osteoblasts.
  • Estrogen inhibits bone remodeling and decreases bone resorption.
  • Estrogen maintains bone formation at the cellular level.
  • Estrogen modulates immune cells (T-cells) involved in bone regulation.

Conclusions:

  • Estrogen plays a vital role in maintaining bone homeostasis through multiple cellular actions.
  • Understanding these pleiotropic effects is key to developing new osteoporosis therapies.
  • Targeting estrogen pathways could offer effective prevention and treatment strategies for osteoporosis.