1 Melatonin enhances the response to l-dopa in MPTP-parkinsonian mice: implication for l-dopa therapy in Parkinson’s disease Sawsan A. Zaitone * and Lamiaa N. Hammad a Department of Pharmacology and Toxicology, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt. /////////////////////////////////// Correspondence at: Dr. Sawsan A. Zaitone, Department of Pharmacology and Toxicology, Suez Canal University, Ismailia 41522, Egypt, Tel: 002-111-1691365 Fax: 002-164-331741 e-mail: Sawsan_zaytoon@pharm.suez.edu.eg, A short running title: Melatonin improves response to l-dopa Sources of support: The authors did not receive a fund from any organization This work was done at The Department of Pharmacology and Toxicology, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt The authors did not receive a fund from NIH; Wellcome Trust; HHMI or other(s). The authors report no conflicts of interest. This work has not been published in its current format and has not been accepted for publication elsewhere Requests for reprint should be made to the corresponding Author This work did not receive any financial support from any organization