Barry Hoffer, Director National Institute on Drug Abuse (NIDA) was invited as Global College of Neuroproetction and Neuroregeneration (GCNN) delegate by Hari & Aruna Sharma to deliver a Key Note Address in Vth International Association of Neurorestoratology (IANR) and 9th GCNN congress in Sofitel, Xi'an, China on May 5th, 2012. His talk was remarkable in relation to neurotrophic factors in Parkinson's Disease treatment showing novel data. His talk stimulated lively discussion and opened new avenue for research in this area.