Ultrasound triggers bone cell mobility

Musculoskeletal tissues, like bone and muscle, have a robust state of dynamic equilibrium in response to mechanical loading and respond to significant stimuli, such as exercise. Dr. Qin and Stony Brook colleagues Drs. Shu Zhang and Jiqi Cheng are investigating how osteoblasts (a bone-forming cell) respond to mechanical signals, such as ultrasound. In laboratory models of murine cells, the research team created a unique method to apply an ultrasound form called acoustic radiation force (ARF) for only one minute on a single osteoblastic cell and groups of cells. They consistently found that ARF through focused ultrasound beam induced cellular cytoskeletal rearrangement, the motility and mobility of the cells, and accelerated intracellular calcium transportations and concentrations.

Dr. Qin's previous findings with ultrasound include the creation of an ultrasound bone scanning device that is more advanced than existing ultrasound technology and assesses bone parameters beyond mineral density. The device is being developed as a diagnostic tool to predict early bone loss. Dr. Qin and his research team is investigating ways to combine this potential diagnostic tool with the ARF technology in the laboratory to identify bone loss and fracture within a bone region, then provide treatment via ARF to promote growth and healing.

The research projects are supported in part by the National Institutes of Health, and the National Space Biomedical Research Institute through a NASA Cooperative Agreement.