title: The neuroprotective effect of ladostigil against hydrogen peroxide-mediated cytotoxicity.
abstract: The multifunctional, anti-Alzheimer drug, ladostigil (TV3326) [(N-propargyl-(3R) aminoindan-5yl)-ethyl methyl carbamate] combines the neuroprotective effects of the anti-Parkinson drug, rasagiline, a selective monoamine oxidase (MAO)-B inhibitor, with the cholinesterase (ChE) inhibitory activity of rivastigmine in a single molecule. Ladostigil has been shown to possess potent antiapoptotic and neuroprotective activities in various oxidative insults in vitro and in vivo, such as prevention of the fall in mitochondrial membrane potential and regulation of Bcl-2 family proteins. In the present study, we demonstrate that ladostigil (1 microM) increased cell viability, associated with the increase of catalase activity and decrease of intracellular reactive oxygen species (ROS) production in human SH-SY5Y neuroblastoma cells exposed to (hydrogen peroxide) H(2)O(2). Furthermore, ladostigil significantly elevated mRNA levels of the antioxidants enzymes, catalase, NAD(P)H quinone oxidoreductase 1 (NQO1) and peroxiredoxin 1 (Prx 1) in H(2)O(2)-treated SH-SY5Y cells. Chronic treatment with ladostigil (1 mg/kg gavage per day for 30 days) markedly up-regulated mRNA expression levels of various antioxidant enzymes in aged rat hippocampus (e.g. glutathione peroxidase precursor (GSHPX-P), glutathione S-transferase (GST) and glucose-6-phosphate dehydrogenase (G6PD)). These findings indicate that in addition to its multiple neuroprotective characteristics, ladostigil also possesses antioxidant properties, which might be beneficial for the treatment of oxidative stress (OS) in aging and age-associated neurodegenerative diseases.
authors.affiliation: Eve Topf and USA National Parkinson Foundation Centers of Excellence for Neurodegenerative Diseases Research and Department of Pharmacology, Rappaport Family Research Institute, Technion-Faculty of Medicine, Haifa, Israel.
authors.forename: Orly
authors.initials: O
authors.lastname: Weinreb
authors.forename: Orit
authors.initials: O
authors.lastname: Bar-Am
authors.forename: Tamar
authors.initials: T
authors.lastname: Amit
authors.forename: Noam
authors.initials: N
authors.lastname: Drigues
authors.forename: Yotam
authors.initials: Y
authors.lastname: Sagi
authors.forename: Moussa B H
authors.initials: MB
authors.lastname: Youdim
mesh_terms: D001483:Base Sequence; D045744:Cell Line, Tumor; D017931:DNA Primers; D006801:Humans; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D007189:Indans / Q000494:pharmacology*; D018696:Neuroprotective Agents / Q000494:pharmacology*; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: C423264:(N-propargyl-(3R) aminoindan-5-yl)-ethyl methyl carbamate; D017931:DNA Primers; D007189:Indans; D018696:Neuroprotective Agents; D006861:Hydrogen Peroxide