An innovative nanomechanical strategy for in vivo biomedical applications is reviewed. The strategy is based on the use of complexes of special functionalized magnetic nanoparticles controlled by an external low-frequency nonheating magnetic field as deformation machines. The advantages of the strategy are the possibility of easily achieved nanoscale locality and molecular selectivity of action (at the level of individual macromolecules and macromolecular structures such as liposomes, living cells, cell organelles), multimodality, safety, and a high potential of therapeutic application, in particular, for noninvasive oncotherapy without drugs.

A new magnetomechanical approach in biomedicine is described. It is based on the rotational oscillations of magnetic nanoparticles (MNPs) in a non-heating magnetic field (MF) at frequencies of 0.1–1000 Hz. Nanodeformations induced in associated macromolecules can be used for selective control of their properties. Models of local molecular effects are presented, and the possibility of inducing biochemical responses through the deformation of biomembranes and membrane structures is assessed. A way of macroscopically limiting the MNP activation volume in a gradient MF is proposed.