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相关概念视频

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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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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Bone Formation by Intramembranous Ossification01:29

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Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into ...
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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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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
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Osteoclasts in Bone Remodeling01:31

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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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Culturing and Measuring Fetal and Newborn Murine Long Bones
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一种孕产妇的大脑激素,可以构建骨.

Muriel E Babey1, William C Krause2, Kun Chen3

  • 1Department of Medicine, Division of Endocrinology and Metabolism, University of California, San Francisco, San Francisco, CA, USA.

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概括

来自大脑神经元的细胞通信网络因子3 (CCN3) 在哺乳期母亲中建立骨. 这种激素支持骨质量并确保后代的生存,为骨质损失提供了潜在的新疗法.

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科学领域:

  • 神经内分泌学神经内分泌学
  • 骨生物学 骨生物学
  • 生殖生物学 生殖生物学

背景情况:

  • 哺乳期由于高需求,导致母亲的骨质损失显著.
  • 产后雌激素水平下降,减少了骨的保护.
  • 之前观察到的一种女性特有的密度骨表型表明涉及的幽默因素.

研究的目的:

  • 为了确定负责哺乳期骨质调节的幽默因子.
  • 研究来自大脑的细胞通信网络因子3 (CCN3) 在骨代谢中的作用.
  • 为了确定CCN3是否充当骨代谢激素.

主要方法:

  • 鉴定了CCN3作为由弧形核KISS1 (ARCKISS1) 神经元分泌的幽默因子.
  • 在实验室中评估CCN3对小鼠和人类骨干细胞活性的影响.
  • 评估CCN3对小鼠骨重塑和骨折修复的影响.
  • 在哺乳小鼠的ARCKISS1神经元中操纵CCN3表达.

主要成果:

  • CCN3刺激骨干细胞活动和骨质突变潜能.
  • 在年轻和老老的小鼠中,CCN3促进骨重塑并加速骨折修复.
  • 哺乳期母亲的CCN3水平降低导致骨质损失和受损的后代在低饮食的生存率.
  • 在哺乳期,ARCKISS1神经元中的CCN3表达增加.

结论:

  • CCN3是一种新型的,来自大脑的骨代谢激素,对于在哺乳期间维持骨质量至关重要.
  • CCN3充当母亲激素,对后代的生存至关重要.
  • CCN3是治疗两性骨质损失的潜在治疗点.