Structure-activity relationship study of pyridazine derivatives as glutamate transporter EAAT2 activators

  • Bioorg Med Chem Lett. 2011 Oct 1;21(19):5774-7. doi: 10.1016/j.bmcl.2011.08.009.
Xuechao Xing  1 ,  Ling-Chu Chang ,  Qiongman Kong ,  Craig K Colton ,  Liching Lai ,  Marcie A Glicksman ,  Chien-Liang Glenn Lin ,  Gregory D Cuny
Affiliations
  • 1. Laboratory for Drug Discovery in Neurodegeneration, Harvard NeuroDiscovery Center, Brigham & Women's Hospital and Harvard Medical School, 65 Landsdowne St., Cambridge, MA 02139, USA.
PMID: 21875806 DOI: 10.1016/j.bmcl.2011.08.009
Abstract

Excitatory Amino acid Transporter 2 (EAAT2) is the major glutamate transporter and functions to remove glutamate from synapses. A thiopyridazine derivative has been found to increase EAAT2 protein levels in astrocytes. A structure-activity relationship study revealed that several components of the molecule were required for activity, such as the thioether and pyridazine. Modification of the benzylthioether resulted in several derivatives (7-13, 7-15 and 7-17) that enhanced EAAT2 levels by >6-fold at concentrations < 5 μM after 24h. In addition, one of the derivatives (7-22) enhanced EAAT2 levels 3.5-3.9-fold after 24h with an EC(50) of 0.5 μM.

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