eLife assessment
This study describes a potential role for mechanical stimulation on non-small cell lung cancer (NSCLC) development. The findings are important and their observations are interesting, as models to study exercise in a mouse cancer setting would have practical implications beyond lung cancer, and biological roles of osteocytes in bone metastatic cancer is an area of great interest for potential therapy development. However, the methods and data interpretation are incomplete and the claims of osteocytes inducing tumor dormancy are overstated. The mechanism by which osteocytes affect tumor cells is not clear and the authors' theory on this remains unproven since much of the data are correlative rather than causative, and adequate controls, data quantification, and confirmation with secondary cell lines are often lacking.