関連する実験動画
Updated: Jul 27, 2026

09:02
Breast Milk Enhances Growth of Enteroids: An Ex Vivo Model of Cell Proliferation
Published on: February 15, 2018
まとめ
授乳している母親は,授乳しない母親よりも血清ビタミンD濃度が高くなります. 授乳自体はビタミンDのレベルを有意に変化させず,授乳中にビタミンDのサプリメントを必要としないことを示唆しています.
科学分野:
- 栄養バイオケミストリー
- 母と乳児の健康について
背景:
- ビタミンDは,骨の健康と免疫機能に不可欠です.
- 母親のビタミンDの状態は,母親と乳児の両方に影響を及ぼします.
- 哺乳期中のビタミンDの動態を理解することは,幼児の栄養にとって重要です.
研究 の 目的:
- 乳児の血清25-ヒドロキシビタミンD濃度を,授乳している母親と授乳していない母親の血清25-ヒドロキシビタミンD濃度を比較する.
- ビタミンD濃度に対する授乳期間 (4~6週間) の影響を評価する.
- 哺乳期にビタミンDサプリメントが必要かどうかを判断する.
主な方法:
- 血清の循環中の25-ヒドロキシビタミンDの測定.
- 最近出産した母親が母乳を授乳していた人と授乳していない母親を比較した結果.
- ベースラインでの評価と,哺乳期4~6週間後の評価.
主要な成果:
- 授乳している母親は,授乳していない母親と比較して,血清の基礎25-ヒドロキシビタミンD濃度が著しく高かった.
- 血清25-ヒドロキシビタミンD濃度は,授乳グループでは,出血から4~6週間の出産後に有意に変化しなかった.
- 4~6週間の基礎測定と母乳育児グループ内の基礎測定の間,ビタミンD濃度の有意な差は観察されなかった.
結論:
- 授乳中の母親は,ビタミンDのレベルを自然に高く保ちます.
- 哺乳期は,母親のビタミンDの貯蔵量を大幅に減少させるようには見えません.
- 現在の証拠は,母乳育児状態のみに基づいて,日常的なビタミンDサプリメントの摂取を裏付けていません.
さらに関連する動画
06:47Isolation of Mesenchymal Stem Cells from Human Alveolar Periosteum and Effects of Vitamin D on Osteogenic Activity of Periosteum-derived Cells
Published on: May 4, 2018
08:12Isolation of Leukocytes from Human Breast Milk for Use in an Antibody-dependent Cellular Phagocytosis Assay of HIV Targets
Published on: September 6, 2019
関連する概念動画
Role of Skin in Vitamin D Synthesis
The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin D3(cholecalciferol).
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin D3(cholecalciferol).
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 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...
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...
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...
Role of Vitamins in Maintaining Bone Health
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...
Teeth
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
Development of the Oral Microbiota
The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...