**Chitosan and Its Modifications: Are They Possible Vehicles for Gene Therapy?**

Ureporn Kedjarune-Leggat1 and Peter A. Leggat2 *1Department of Oral Biology and Occlusion, Faculty of Dentistry Prince of Songkla University, Hat Yai, Songkhla 2Anton Breinl Centre for Public Health and Tropical Medicine James Cook University, Townsville, Queensland* 

*1Thailand* 

*2Australia* 
