Our lab has been examining the biology of MSCs with a view to developing rapid molecular markers and tests for evaluating/purifying maximally efficacious cultures of MSCs. The group also specializes in bone repair by MSCs. Based on detailed characterization of the molecular mechanism of osteoblast differentiation by MSCs, a novel and effective bone regeneration strategy has been developed. Additionally, we are currently examining the effects of various small molecules and immunological strategies for the safe and effective inhibition of Dkk-1 activity in bone tumors.We have recently established methods to model bone-tumor interactions using bioreactors that simulate microgravity.