血清ビタミンDが年齢に関連する生理学的変化に及ぼす影響: 中年成人における横断的研究
Poulami Dhar1, Prajna Bhandary2, Shailaja Moodithaya1
1Department of Physiology, Nitte (Deemed to be University), KS Hegde Medical Academy, Mangalore, Karnataka, India.
Comprehensive Physiology
|September 3, 2025
まとめ
中年の成人におけるビタミンD欠乏は,早期老化マーカーに影響を与える可能性があります. この研究では,ビタミンDレベルとBMIや握り力などの表型老化指標の関連性を調べました.
科学分野:
- ゲロントロジーと栄養科学
- 老化のバイオマーカー
- 代謝 健康
背景:
- 生理学的老化は様々で,ビタミンD欠乏症 (ヒポビタミノシスD) はしばしば老化に関連しているが,若い人にも影響する.
- 体質指数 (BMI),腰比 (WHR),体脂肪率 (F%),腰身長 (WS),握り力 (HGS) を含むフェノタイプの老化マーカーは,生理学的変化の測定可能な指標です.
- ビタミンDとこれらのマーカーの関連性を理解することは 早期老化に寄与する要因を特定するのに不可欠です
研究 の 目的:
- 中年の成人のフェノタイプの老化マーカーに対するビタミンDの影響を調査する.
- ビタミンDの影響で 老化マーカーの微妙な変化が 早期老化を予測できるという仮説を 探求するためです
主な方法:
- 横断的な研究デザインが採用された.
- 健康な参加者は,外来診療所 (OPD) から都合の良いサンプルを採取した.
- 人体測定,身体検査,ビタミンD値の血液検査が行われました. 参加者は,ビタミンD不足 (<20ng/dL),不足 (20〜30ng/mL),および十分な (> 30ng/dL) グループに分けられた.
主要な成果:
- 3つのビタミンDレベルグループで頻度分析が行われました.
- 様々な表型老化マーカーとビタミンD濃度との間に有意な関連性が見られた.
結論:
- この研究は,ビタミンDを老化マーカーと関連付ける仮説を支持することを目的としたが,結果は限られていた.
- 年代的な年齢と小さなサンプルサイズとの多線性性は制限として特定され,さらなる調査を正当化しました.
関連する概念動画
Role of Skin in Vitamin D Synthesis
5.6K
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...
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...
5.6K
Bone Disorders
3.9K
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...
3.9K
Role of Vitamins in Maintaining Bone Health
3.6K
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...
3.6K
The Effect of Aging on Tissues
2.4K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
2.4K
Skeleton and Calcium Homeostasis
4.8K
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.
4.8K
Connective Tissue Cell Types
3.4K
Connective tissue develops from the mesoderm of a developing embryo and consists of cells, fibers, and ground substance: a gel-like material containing large complexes of carbohydrates and proteins. Connective tissue was first identified as a separate tissue family in the 18th century, and Johannes Peter Muller coined the term connective tissue.
Fat cells (adipocytes), smooth muscle cells (myoblasts), and bone cells (osteoblasts) are some connective tissue cell types. Some immune system cells...
Fat cells (adipocytes), smooth muscle cells (myoblasts), and bone cells (osteoblasts) are some connective tissue cell types. Some immune system cells...
3.4K


