ABSTRACT
BACKGROUND: The physical health and quality of life of the elderly are severely affected by osteoporosis (OP). METHODS: We explored the regulatory mechanism of ICA in vivo and in vitro by constructing OP rats and inducing osteogenic differentiation of BMSCs. First, we determined the expression of miR-335-5p in bone tissues of OP patients, bone tissues of OP rats, and osteogenic BMSCs by RT-qPCR. Alizarin red staining was employed to detect the formation of calcium nodules in the cells. MTT was used to detect cell viability. Finally, we detected the bone tissue changes in OP rats by overexpression of miR-335-5p or oral ICA. RESULTS: miR-335-5p was lowly expressed in bone tissues of OP patients and OP rats. ICA treatment reversed the inhibitory effect of miR-335-5p inhibitor on BMSCs matrix mineralization. Moreover, PTEN was verified to be a downstream effector of miR-335-5p. During ICA induction, overexpression of PTEN reversed the promotive effect of miR-335-5p mimics on the osteogenic differentiation of BMSCs. In vivo experiments also found that overexpression of miR-335-5p or ICA treatment improved the pathogenesis of OP in rats. CONCLUSION: ICA improved OP by up-regulating miR-335-5p to inhibit PTEN, thereby providing a new strategy for the prevention and treatment of OP.
Subject(s)
Mesenchymal Stem Cells , MicroRNAs , Osteoporosis , Aged , Animals , Bone Marrow Cells/metabolism , Cell Differentiation , Cells, Cultured , Flavonoids , Humans , Mesenchymal Stem Cells/metabolism , MicroRNAs/metabolism , Osteogenesis/genetics , Osteoporosis/drug therapy , Osteoporosis/genetics , Osteoporosis/metabolism , Quality of Life , RatsABSTRACT
OBJECTIVE: To explore the operative method and clinical effect of lateral mini plate and Kirschner wire in the treatment of distal humeral metaphysis junction fracture in children. METHODS: From January 2015 to December 2018, 21 cases of distal humeral diaphyseal metaphyseal junction fracture were analyzed retrospectively, including 12 males and 9 females, aged 2 to 10 years with an average age of 4.5 years, and the time from injury to operation was 6 hours to 7 days. The imaging data showed that the fracture line was located at the junction of the distal humerus and metaphysis. There were 10 oblique fractures, 8 transverse fractures and 3 comminuted fractures. The operation methods were open reduction, lateral mini plate and Kirschner wire assisted internal fixation, and the improved Flynn elbow joint scoring standard was used to evaluate the clinical effect. RESULTS: All the 21 children were followed up for 8 to 24 months, with an average of 13 months. The healing time was 6 to 8 weeks, with an average of 7.2 weeks. There were no complications such as fracture displacement, cubitus varus and ulnar nerve injury. According to the improved Flynn elbow joint scoring standard, 19 cases were excellent and 2 cases were good. CONCLUSION: The treatment of distal humeral metaphyseal junction fracture in children is different from that of supracondylar fracture of humerus.
