Structure, Function, and Pharmacology of Glutamate Receptor Ion Channels
Published on 11.10.2021 in Pharmacological Reviews
Kasper B. Hansen, Lonnie P. Wollmuth, Derek Bowie, Hiro Furukawa, Frank S. Menniti, Alexander I. Sobolevsky, Geoffrey T. Swanson, Sharon A. Swanger, Ingo H. Greger, Terunaga Nakagawa, Chris J. McBain, Vasanthi Jayaraman, Chian-Ming Low, Mark L. Dell’Acqua, Jeffrey S. Diamond, Chad R. Camp, Riley E. Perszyk, Hongjie Yuan and Stephen F. Traynelis
Many physiologic effects of l-glutamate, the major excitatory neurotransmitter in the mammalian central nervous system, are mediated via signaling by ionotropic glutamate receptors (iGluRs). These ligand-gated ion channels are critical to brain function and are centrally implicated in numerous psychiatric and neurologic disorders. There are different classes of iGluRs with a variety of receptor subtypes in each class that play distinct roles in neuronal functions. The diversity in iGluR subtypes, with their unique functional properties and physiologic roles, has motivated a large number of studies. Our understanding of receptor subtypes has advanced considerably since the first iGluR subunit gene was cloned in 1989, and the research focus has expanded to encompass facets of biology that have been recently discovered and to exploit experimental paradigms made possible by technological advances. Here, we review insights from more than 3 decades of iGluR studies with an emphasis on the progress that has occurred in the past decade. We cover structure, function, pharmacology, roles in neurophysiology, and therapeutic implications for all classes of receptors assembled from the subunits encoded by the 18 ionotropic glutamate receptor genes.
Significance Statement Glutamate receptors play important roles in virtually all aspects of brain function and are either involved in mediating some clinical features of neurological disease or represent a therapeutic target for treatment. Therefore, understanding the structure, function, and pharmacology of this class of receptors will advance our understanding of many aspects of brain function at molecular, cellular, and system levels and provide new opportunities to treat patients.
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