开发和验证新的免费维生素D方程:健康衰老和身体组成研究
Jonathan H Cheng1,2, Andrew N Hoofnagle3, Ronit Katz4
1Division of Nephrology-Hypertension University of California San Diego CA USA.
JBMR plus
|September 13, 2023
概括
估计含有维生素D结合蛋白 (VDBP) 现型的自由维生素D (25(OH) D水平的新方程式比现有方法提供了更好的准确性. 这些进展有助于更好地评估维生素D状态,特别是当VDBP水平在个人之间有很大差异时.
科学领域:
- 生物化学 生化学
- 内分泌学 在内分泌学.
- 临床化学 临床化学
背景情况:
- 维生素D缺乏是很常见的,影响25%的美国人.
- 由于高结合蛋白 (VDBP) 的变异性,总25(OH) D水平可能不准确.
- 自由25 (OH) D是一个更准确的指标,但很难精确测量.
研究的目的:
- 开发和验证新的方程来估计自由的25 (OH) D.
- 通过包括VDBP表型来提高自由25 (OH) D估计的准确性.
- 为了比较新的方程与现有方法的性能.
主要方法:
- 在370名参与者中开发了使用多重线性回归的三种新的免费25...OH) D估计方程.
- 包括生物标志物,如白蛋白,25(OH) D,VDBP和副甲状腺激素.
- 内部使用布兰德-阿尔特曼图表验证并与测量自由25 (((OH) D.D.进行比较的方程.
主要成果:
- 这三个新的方程都预测了分别为76%-80%和48%-52%的参与者在30%和15%的范围内免费的25(OH) D.
- 包括VDBP表型在内的方程 (Eq. 2) 显示了最高的精度 (平均偏差为0.06 pg/mL).
- 现有的方程表现不那么准确,估计只有43%和22%的参与者在30%和15%之间免费的25...OH) D.
结论:
- 使用临床可用和实验室密集型生物标志物的组合,可以可靠地估计自由25 (OH) D.
- 结合VDBP表型的新方程式提高了免费25(OH) D评估的准确性.
- 这些改进的估计方法为评估不同人群中维生素D状况提供了更精确的方法.
相关概念视频
Role of Skin in Vitamin D Synthesis
5.3K
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...
5.3K
Role of Vitamins in Maintaining Bone Health
3.4K
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...
3.4K
Study Designs in Epidemiology
263
Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and...
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and...
263
Connective Tissue Cell Types
3.3K
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...
3.3K
Data Validation
5.1K
Data validation is an essential part of a comprehensive assessment. Validation is confirming or verifying and opening the door to gathering more assessment data as it clarifies vague or unclear data. The process of checking and verifying the collected information is called data validation. The primary purpose of data validation is to ensure data is as free from error, bias, and misinterpretation as possible.
Nursing assessment guides are generally based on holistic models rather than medical...
Nursing assessment guides are generally based on holistic models rather than medical...
5.1K


