Free Radicals and Gastric Cancer

Mahmoud Lotfy1 and Yousery E. Sherif2 1Associate Professor of Molecular Cell Biology & Immunology, Molecular and Cellular Biology Department, Genetic Engineering and Biotechnology Research Institute, Minufiya University, Sadat City, Minufiya, Egypt and Department of Applied Medical Sciences, Jouf University, Qurayat, 2Clinical Pharmacology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt and Department of Chemistry, Faculty of Science and Arts, Olla, Taibah University, Saudi Arabia