**Nano-Particulate Calcium Phosphate as a Gene Delivery System**

Babak Mostaghaci1,2, Arash Hanifi3, Brigitta Loretz1 and Claus-Michael Lehr1,4 *1Dept. of Drug Delivery (DDEL), Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infectious Research (HZI) Saarland University, Saarbruecken 2Biomaterials Group, Materials Engineering Department Isfahan University of Technology, Isfahan 3Tissue Imaging and Spectroscopy Lab, Bioengineering Department Temple University, Philadelphia, PA 4Department of Biopharmaceutics and Pharmaceutical Technology Saarland University, Saarbruecken*  1,4*Germany* <sup>2</sup>*Iran* <sup>3</sup>*USA*
