Zhongguo quanke yixue (Mar 2023)
Association of Osteoporosis with Muscle, Bone and Lipid Related Indices
Abstract
Background As a chronic age-related disease known as "silent killer" in medical academic circle, osteoporosis is manifested by slow and insidious development, and obvious age-related physiological changes in muscle, bone and fat. There are few studies on the relationship of osteoporosis with muscle, bone, and fat indices. Objective To assess the relationship of osteoporosis with muscle, bone, and fat indices. Methods A total of 108 patients with primary osteoporosis were recruited from the Third Affiliated Hospital of Guangzhou University of Chinese Medicine according to the inclusion and exclusion criteria from July 19, 2019 to January 5, 2021. Data were collected, including general data (height, weight and BMI) , T-score, fat mass, muscle mass and bone mineral content measured by the dual-energy X-ray absorptiometry, bone formation indices, such as serum calcium, bone morphogenetic protein-2 (BMP2) and osteoproteintin (OPG) detected by ELISA. Height, weight, BMI, T-score, fat mass, muscle mass, fat percentage and bone mineral content were compared across three age groups. Fat mass, muscle mass, fat percentage, bone mineral contents and bone formation indices were compared across normal group (T-score≥-1.0, n=20) , bone loss group (-2.5<T-score<-1.0, n=38) and osteoporosis group (T-score ≤-2.5, n=50) divided by the T-score. Results The T-score varied significantly in three age groups of 49-58, 59-68, and≥69 (P<0.05) , and it was the highest in the 49-58 age group (P<0.01) . Compared with the normal group, bone loss group had decreased bone mineral content, while osteoporosis group had decreased fat mass and bone mineral content (P<0.05) . Compared with the bone loss group, both the muscle mass and bone mineral content in the osteoporosis group were decreased (P<0.05) . Compared with normal group, a significant decrease was found in OPG and BMP2 in osteoporosis group, and in BMP2 in bone loss group (P<0.05) . Compared with bone loss group, a significant decrease was found in OPG and BCL2 in osteoporosis group (P<0.05) . Conclusion The abnormality in dynamic balance between muscular and skeletal systems and adipose tissue is closely related to the pathogenesis of osteoporosis. Bone mineral density decreases with age, decrease in serum BMP2, OPG and Bcl2 levels may be related to the failure of apoptosis-regulatory proteins to play a good role in anti-apoptosis and promoting bone formation, resulting in the decrease of osteoblast activity and the weakening of bone formation activity.
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