Design of NAALADase Inhibitors A Novel Neuroprotective Strategy
Abstract:Excessive glutamatergic transmission is thought to be responsible for the injury observed in a variety of neurological disorders such as stroke. N-acetylaspartylglutamate (NAAG), a major peptidic component of the brain, has been suggested to serve as a potential storage form of glutamate. N-acetylated-a-linked acidic dipeptidase (NAALADase, EC 220.127.116.11) is responsible for the hydrolysis of NAAG into N-acetylaspartate (NAA) and glutamate. If NAAG is a storage form of glutamate, then inhibition of NAALADase should be neuroprotective in diseases in which excess glutamatergic transmission is detrimental. In addition, NAAG has been demonstrated to be an agonist at group II metabotropic glutamate receptors and functions as a mixed agonist antagonist at N-methyl-D-aspartate receptors. Therefore, inhibition of NAALADase would also function to increase NAAG levels which, in turn, should provide neuroprotection via the interaction of NAAG with these receptors. Recently, potent and selective inhibitors of the enzyme have been designed and subsequently used to demonstrate that inhibition of NAALADase is neuroprotective in animal models of neurodegeneration. As such, NAALADase inhibition represents a novel method of regulating extracellular glutamate levels and provides a new avenue for the treatment of neurological disorders.
Keywords: N-acetylaspartate; N-acetylaspartylglutamate NAAG; N-acetylated-a-linked acidic dipeptidase NAALADase; NAALADase INHIBITOR; NAALADase Inhibitors; Neuroprotective Strategy; PHOSPHORUS; glutamatergic transmission
Document Type: Review Article
Publication date: July 1, 2001
- Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.