相关实验视频
Updated: Jun 1, 2025
08:56
Estrogen-Like Effect of Bazi Bushen Capsule in Ovariectomized Rats
Published on: April 7, 2023
824
在骨质母细胞中,酶性脂质过氧化的调节可以防止绝经后的骨质疏松症
Qiong-Yi Zhang1,2,3,4, Hai-Biao Gong1,2,3,4,5, Man-Ya Jiang1,2,3,4
1State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou, 510632, China.
Nature communications
|January 17, 2025
概括
绝经后的骨质疏松症涉及脂过氧化损害骨质母细胞. 增强谷氨过氧化酶4 (GPX4) 活性,可能与生醇一起,可以对抗这种损伤并促进骨健康.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 内分泌学 在内分泌学.
背景情况:
- 氧化应激与绝经后的骨质疏松症有关.
- 氧化应激在骨质母细胞中的作用尚未完全理解.
- 雌激素对骨质细胞功能的影响对骨健康至关重要.
研究的目的:
- 调查在绝经后骨质疏松症期间骨质母细胞中脂过氧化的作用.
- 为了确定将雌激素缺乏,氧化应激和骨质母细胞发生障碍联系在一起的分子机制.
- 探索减轻骨质疏松症的潜在治疗点.
主要方法:
- 在骨质母细胞中评估脂过氧化水平.
- 分析了谷氨过氧化酶4 (GPX4) 的表达和功能.
- 研究GPX4抑制/激活和脂过氧化物减少对骨质母细胞生成的影响.
- 识别涉及4-基诺和整合素结合激酶的分子相互作用.
主要成果:
- 绝经后的骨质疏松症的特征是骨质母细胞中脂过氧化增加.
- 雌激素缺乏下调GPX4,导致高脂过氧化物和骨质母细胞发生障碍.
- 抑制GPX4会加剧骨质损失,而过氧化物消除会挽救骨的形成.
- 4-hydroxynonenal通过整合素相关的激酶降解来破坏RUNX2信号传递.
- 6-和8-甘醇激活GPX4,促进骨质母细胞形成并产生抗骨质疏松作用.
结论:
- 骨质母细胞中的脂过氧化是绝经后骨质疏松症的关键驱动因素.
- GPX4是骨质细胞功能的关键调节者,也是潜在的治疗点.
- 像生醇这样的天然化合物通过激活GPX4.4来治疗骨质疏松症有希望.
相关概念视频
01:40Bone Remodeling
38.1K
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.
38.1K
01:31Osteoclasts in Bone Remodeling
2.8K
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...
2.8K
01:29Bone Disorders
3.4K
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 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...
3.4K
01:25Role of Vitamins in Maintaining Bone Health
3.1K
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...
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...
3.1K
01:17Hormones and Bone Tissue
2.6K
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...
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...
2.6K
01:24Peroxisomes
10.0K
Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
10.0K