TARP Auxiliary Subunits Shape AMPA Receptor Pharmacology and Functional Regulation

Supervisor Name

Mohammad Qneibi

Supervisor Email

mqneibi@najah.edu

University

An-Najah National University

Research field

Medical Sciences

Bio

Dr. Mohammad Qneibi earned a doctorate in neurochemistry from the State University of New York, Albany. Dr. Qneibi then pursued postdoctoral training at Yale University School of Medicine and Hebrew University-Hadassah School of Medicine. He joined the faculty at An-Najah University in 2016. He is the Director/Founder of the Center for Neuroscience Research and an Associate Professor in the Biomedical Sciences Department. Dr. Qneibi's research focuses on membrane proteins on the cell's surface. Extracellular signals, such as neurotransmitters, hormones, and sensory stimuli, regulate the activity of all cells. These signals are transmitted into the cell's interior via membrane receptor proteins. The primary research interest in my lab is understanding the mechanisms by which these membrane proteins facilitate signal transmission and transduction. He is particularly interested in the kinetic and molecular mechanisms of protein function, as well as how protein-protein and protein-drug interactions influence structure and function. In addition, he is working to develop more effective inhibitors/potentiators to regulate membrane protein function. In the long run, he expects his research will provide a better understanding of the mechanisms of action of these molecular machines and valuable insights for developing molecular devices that can be used as diagnostic and detection tools for disease treatment and the study of signal transduction pathways. Dr. Qneibi's research takes an interdisciplinary approach, combining electrophysiology, neuroscience, molecular biology, biochemical and biophysical chemistry, and membrane protein-specific rapid kinetic techniques.

Description

AMPA receptor-mediated neurotransmission has emerged as a crucial mechanism in various neurological disorders. The activity of AMPAR has been found to be regulated by various auxiliary proteins. Among these, TARP proteins, specifically TARPγ8, play a crucial role in modulating AMPAR. The objective of this project is to explore the structure–activity relationships of a set of heterocyclic small molecules with rigid polycyclic scaffolds and nitrogen-containing side chains, types of structures often linked with AMPAR modulation. Recombinant AMPARs will be tested in isolation and in combination with TARPγ8 in mammalian cells by employing the patch clamp electrophysiology technique. These evoked currents will be examined to determine if there are any effects of compounds on amplitude, deactivation, or desensitization of glutamate-evoked currents. The goal of this study is to determine how molecular structures and TARP association influence modulation of AMPAR through correlations of functional effects with molecular structures and TARP association. The findings of this study will be important in understanding how to modulate AMPAR in synapses in order to develop new compounds in the future.