Department of Cell Biology, Neurobiology & Anatomy Medical College of Wisconsin 8701 Watertown Plank Road Milwaukee, WI 53226-0509
Phone: (414) 456-4107 FAX: (414) 456-6517 email: ngerges@mcw.edu
Education: PhD, University of Houston, 2002 Postdoctoral, University of Michigan
Graduate Programs: Program in Cell and Developmental Biology Program in Neuroscience
Positions Available: Positions are currently available for PhD students and Postdoctoral Fellows. Please contact Dr. Nashaat Gerges at ngerges@mcw.edu, or visit our Postdoctoral Positions web page.
Research Area: Cellular and molecular mechanisms of synaptic plasticity
Communication between neuronal cells in the brain occurs through tiny contacts called synapses. The ability of these synapses to change their strength and remodel is termed synaptic plasticity, which is thought to be the cellular correlate of learning and memory. Several neurological and neurodegenerative diseases (e.g., Alzheimer's disease, schizophrenia and mental retardation) as well as some hormonal and homeostasis abnormalities (e.g., hypothyroidism and stress) have some form of synaptic plasticity malfunction. The research in the laboratory is focused on elucidating the molecular and cellular mechanism of synaptic plasticity, and the associated changes in the disease states.
The major experimental approach is the expression of recombinant neurotransmitter receptors and regulatory proteins tagged with GFP or RFP in organotypic hippocampal cultured slices or in vivo. In order to understand how these regulatory molecules contribute to neuronal function, the lab uses a combination of in vivo and ex vivo electrophysiology, biochemistry, confocal imaging and electron microscopy (EM) analysis.
Electrophysiological whole-cell double recording configuration. Stimulation of Schaffer collateral pathway and simultaneous recording from a control cell and a neuron expressing a regulatory molecule.
Confocal microscopy images for a neuron expressing GluR2-GFP and a regulatory protein tagged with RFP. Immunohistochemistry enables visualizing the surface recombinant receptors (Cy5).
Electron microscopy micrographs of GluR2/3 gold immunolabelling at hippocampal CA1 synapses. * denotes presynaptic terminals; PSD is the postsynaptic density