Aptamer

  In ancient Greek ‘Nano’ means dwar. Nanotechnology is the creation and utilization of materials, devices, and systems through the control of matter on the nanometer-length scale, i.e. at the level of atoms, molecules, and supramolecular structures. These technologies have been applied to improve drug delivery and to overcome some of the problems of drug delivery for cancer treatment. The magic of nanoparticles mesmerize everyone because of their multifunctional character and they have given us hope for the recovery from this disease. Nanoparticles can be used to deliver hydrophilic drugs, hydrophobic drugs, proteins, vaccines, biological macromolecules, etc. They can be formulated by aptamer conjugation for targeted delivery to the lymphatic system, brain, arterial walls, lungs, liver, spleen, or made for long-term systemic circulation. Therefore, numerous protocols exist for synthesizing nanoparticles based on the type of drug used and the desired delivery route. In modern medicine technologies the oral administration of solid forms is the preferred route for drug delivery. Thus, in pharmaceutical applications, size, shape and morphology of the solid particles are important because they can affect the solubility as well as bioavailability of the drug particles.