饮食中缺铁或过度负荷对骨的影响:饮食细节很重要
Ulrike Baschant1, Brie K Fuqua2, Maria Ledesma-Colunga1
1Department of Medicine III & Center for Healthy Aging, Technische Universität Dresden, Germany.
Bone
|April 4, 2024
概括
高铁饮食对小鼠的骨强度产生负面影响,特别是皮质骨. 富含营养的饮食可能有助于减轻铁过载对骨健康的这些不良影响.
科学领域:
- 骨生物学和矿物代谢
- 营养科学和毒理学.
- 在骨科研究的体内动物模型.
背景情况:
- 铁的平衡对于骨健康至关重要,缺乏和过载都与人类的骨强度受损有关.
- 以前在小鼠身上进行的研究对铁对骨的影响产生了不一致的结果,这可能是由于饮食和遗传背景的变化.
- 了解这些差异对于阐明铁在骨完整性中的作用至关重要.
研究的目的:
- 为了研究高铁和低铁饮食对六种不同的内科小鼠菌株骨参数的影响.
- 为了评估饮食成分,除了铁含量之外,对骨对铁过载的反应的影响.
- 为了确定骨易受改变的铁平衡的菌株特异性差异.
主要方法:
- 六种内生小鼠被养高 (20,000 ppm) 或低 (∼10 ppm) 铁的饮食,在断奶后6-8周.
- 一组C57BL/6J雄性接受了不同营养特征的高铁饮食 (TUD与UCLA研究),以评估饮食成分的影响.
- 牺牲后的分析包括肝脏,血液,骨矿物质密度,微观结构和血清骨循环标志物.
主要成果:
- 在加州大学洛杉矶分校的研究中,高铁饮食显著减少了皮层和椎骨质量,加上大多数菌株的骨质再吸收率提高.
- 在C57BL/6J,A/J和DBA/2J小鼠中,缺铁并没有改变骨,但在BALB/cJ,C3H/HeJ和AKR/J小鼠中增加了轨道骨.
- 在TUD研究中,在高铁饮食的C57BL/6J小鼠中,皮层骨的参数下降,但椎骨和骨周量保持不变,这表明饮食质量发挥了作用.
结论:
- 皮层骨表现出比状骨更容易受到铁过载的敏感性.
- 富含营养的饮食对于潜在地抵消铁过载对骨健康的有害影响很重要.
- 饮食背景显著影响了小鼠对铁失调的骨反应.
相关概念视频
01:29Bone Disorders
3.5K
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...
3.5K
01:17Hormones and Bone Tissue
2.7K
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...
2.7K
01:25Role of Vitamins in Maintaining Bone Health
3.3K
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...
3.3K
01:40Bone Remodeling
38.3K
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.
38.3K
01:30Vitamins
714
Vitamins, derived from the Latin word for life, are essential organic substances required in small quantities for optimal growth and overall well-being. Unlike other organic nutrients, vitamins don't act as sources of energy or building materials but rather facilitate these nutrients' utilization by the body. Vitamins are predominantly coenzymes, assisting enzymes in specific chemical actions, like the oxidation of glucose for energy involving B vitamins. Most vitamins are not produced...
714
01:31Essential Minerals for Bone Health
3.9K
The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
3.9K