Polymer Nanoparticle Technologies for Gene Delivery and Gene Therapy focuses on the concept of polymer nanoparticles applications in gene delivery and gene therapy. Gene therapy is a relatively young branch of medicine that has the potential to relieve and treat numerous illnesses that are resistant to standard treatment. Polymers used to form nanoparticles can be both synthetic and natural polymers. These nanocarriers have been demonstrated for use as a variety of applications: such as drug delivery, imaging, and detection of apoptosis. This book covers many of the cationic polymers have been studied both in vitro and in vivo for gene delivery.