Margaret E. Rice

Margaret E. Rice, PhD

Professor, Department of Neurosurgery

Professor, Department of Neuroscience and Physiology

neurochemistry and neurophysiology of the nigrostriatal dopamine pathway, channels and transporters, molecular, cellular, & translational neuroscience

Research in Dr. Rice's laboratory is focused on regulation of dopamine, a key transmitter in motor and reward pathways in the brain. The Rice group uses carbon-fiber microelectrodes with fast-scan cyclic voltammetry to provide real-time monitoring of axonal dopamine release in dorsal and ventral striatum and somatodendritic release in the substantia nigra and ventral tegmental area, primarily in brain slices. Complementary techniques include whole-cell recording of basal ganglia neurons, fluorescence imaging of calcium and reactive oxygen species (ROS), and immunocytochemistry. Current research is centered on a novel finding from the Rice group that hydrogen peroxide (H2O2), produced by mitochondrial respiration, is an endogenous regulator of synaptic and somatodendritic dopamine release, as well as dopamine neuron activity in the substantia nigra. Both dopamine release and dopamine neuron activity are suppressed by H2O2 via the activation of ATP-sensitive potassium (KATP) channels. Importantly, modulation by H2O2 is greater in the nigrostriatal dopamine pathway, which degenerates in Parkinson's disease (PD), than in the mesolimbic dopamine reward pathway that is relatively spared in PD. Given that mitochondrial dysfunction and oxidative damage have been linked causally to PD, these findings suggest that modulation by H2O2 is a double-edged sword. This diffusible messenger can rapidly link metabolism to neuron excitability; however, if generation or metabolism of H2O2 were disrupted, this could lead to oxidative damage. On-going studies are examining how H2O2 activates KATP channels, the time course of dopamine release regulation by H2O2, and how other neurons in the basal ganglia are affected by endogenous H2O2. In addition to these core project, the Rice group also studies regulation of axonal dopamine release by glutamate, GABA, calcium, cannabinoids and caffeine, the mechanism and regulation of somatodendritic dopamine release, and dopamine dysfunction in transgenic mouse models of dystonia and PD.



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455 First Avenue

Eighth Floor, Suite 869

New York, NY 10016

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Professor, Department of Neurosurgery

Professor, Department of Neuroscience and Physiology

PhD from University of Kansas

Fellowship, New York University School of Medicine, Physiology and Biophysics

Rice, Margaret E

ACS chemical neuroscience. 2017 Feb 7; 8(2):215-217

Farooq, Mobeen; Kim, Seonil; Patel, Sunny; Khatri, Latika; Hikima, Takuya; Rice, Margaret E; Ziff, Edward B

Neuropharmacology. 2017 Feb; 113(Pt A):426-433

Sulzer, D; Cragg, SJ; Rice, ME

Handbook of behavioral neuroscience. 2017; 24:373-402

Ludwig, Mike; Apps, David; Menzies, John; Patel, Jyoti C; Rice, Margaret E

Comprehensive physiology. 2016 Dec 06; 7(1):235-252

Asri, R; O'Neill, B; Patel, J C; Siletti, K A; Rice, M E

Analyst. 2016 Nov 14; 141(23):6416-6421

Sulzer, David; Cragg, Stephanie J; Rice, Margaret E

Basal ganglia. 2016 Aug; 6(3):123-148

Stouffer, Melissa A; Woods, Catherine A; Patel, Jyoti C; Lee, Christian R; Witkovsky, Paul; Bao, Li; Machold, Robert P; Jones, Kymry T; de Vaca, Soledad Cabeza; Reith, Maarten E A; Carr, Kenneth D; Rice, Margaret E

Nature communications. 2015 Oct 27; 6:8543-8543