Today, nanotechnology plays a vital role in biomedical applications, especially for the diagnosis and treatment of various diseases.\nAmong the many different types of fabricated nanoparticles, magnetic metal oxide nanoparticles stand out as unique and useful\ntools for biomedical applications, because of their imaging characteristics and therapeutic properties such as drug and gene\ncarriers. Polymer-coated magnetic particles are currently of particular interest to investigators in the fields of nanobiomedicine\nand fundamental biomaterials. The ranostic magnetic nanoparticles that are encapsulated or coated with polymers not only exhibit\nimaging properties in response to stimuli, but also can efficiently deliver various drugs and therapeutic genes. Even though a large\nnumber of polymer-coated magnetic nanoparticles have been fabricated over the last decade,most of these have only been used for\nimaging purposes. The focus of this review is on polysaccharide-coated magnetic nanoparticles used for imaging and gene delivery.
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