Independence of the body composition index from nutritional status affecting bone maturation
Huiping Su1, Yan Li1,2, Zhongwei Xu1
1Department of Endocrinology, Shenzhen Children's Hospital, Shenzhen, China.
Background:
To examine the characteristics and factors associated with bone maturation among children aged 6-15 years in Shenzhen, stratified by sex, age, and pubertal stage.
Methods:
The Evaluation and Monitoring on School-based Nutrition and Growth in Shenzhen, China' data on body mass index, body composition, bone age (BA), and biochemical examinations were analyzed. The Z-score of BA minus chronological age (ZBA-CA) was calculated for the same sex, age, and pubertal stage.
Results:
We included 3780 students aged 6-15 years, comprising 2091 (55.3%) boys and 1689 (44.7%) girls. The proportions of children with BA advancement ≥2 years were 10.1% for boys and 9.9% for girls. We established the standard deviation curves of BA-CA for boys and girls with normal weights at different ages under different pubertal stages. Visceral fat area rank (VFA-R) and relative handgrip strength rank (RHGS-R) correlated positively with ZBA-CA at each quantile in boys, while only VFA-R correlated positively in girls.
Conclusions:
Bone maturation should be evaluated according to sex, age, nutritional status, and pubertal stage. VFA-R and RHGS-R were positively correlated with ZBA-CA, independent of the nutritional status.
Impact Statement:
We produced the first standard deviation curves of bone age minus chronological age (BA-CA) for children aged 6-15 years, stratified by sex, age and pubertal stage, to evaluate bone maturation. Our findings revealed that body composition index might affect bone maturation independent of nutritional status. Body mass index, commonly used to evaluate obese children with advanced bone age, does not account for differences and relationship between body composition and bone maturation. These findings offer valuable insights for clinical practice to formulate targeted interventions for slowing down bone maturation and improving growth-related disorders' management in children.
Related Concept Videos
01:10Nature and Nurture
01:29Bone Disorders
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...
01:31Essential Minerals for 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...
01:17Hormones and Bone Tissue
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...
01:09Changes in the Appendicular Skeleton with Age
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
01:25Role of Vitamins in Maintaining Bone Health
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...