L-335A Auditory Neuroscience Oregon Health & Science University 3181 SW Sam Jackson Park Rd, Portland, OR 97239 Phone: 503-494-2967 (W) Email: lut@ohsu.edu Tao Lu Research Experience & Peer-Reviewed Research Articles 1999–the present Oregon Health & Science Univ. Portland, OR Research Associate Lu T, Rubio ME, Trussell LO. “Glycinergic transmission shaped by the co-release of GABA in a mammalian auditory synapse.” Neuron. 2008; 57(4):524-35. I found that GABA, when co-released with glycine, directly modifies postsynaptic glycine receptor and reduces the duration of glycinergic synaptic transmission. This is of particular significance in auditory system because the temporal precision and brevity of inhibition is recognized as crucial for functions such as sound source localization. I also suggested more general utilization of this novel mechanism for synaptic fine-tuning, i.e. mixing of ligands of different affinities in synaptic vesicles. The background and significance of this study was discussed in a Preview article in the same issue by Dr. Joshua Singer of Northwestern University. Lu T, Trussell LO. “Development and elimination of excitatory synapses in chick cochlea nucleus.” The Journal of Neuroscience. 2007; 27(4):808-17. In a unique endbulb synapse preparation, I found that for synapses competing for postsynaptic targets, those destined for elimination have significantly smaller quantal size. This is consistent with earlier observations in peripheral nervous system, but is controversial for CNS synapses. Proper function of the auditory system requires precise tonotopic projections arising from such elimination of supernumerary synapses. The endbulb preparation and the methodology described in this study may be well suited for testing molecules suspected of initiating or mediating synapse elimination. The Journal of Neuroscience featured this study in the section “This Week In The Journal.” Lu T, Trussell LO. “Mixed excitatory and inhibitory GABAmediated transmission in chick cochlear nucleus.” Journal of Physiology. 2001; 535(Pt 1):125-31. In this Rapid Report, I noted a GABAergic synapse with consistently depolarized reversal potential, regardless of the developmental stage. Surprisingly, this synapse is capable of either exciting or inhibiting the postsynaptic neurons, depending on the activation context. This further expands the spectrum of functional roles played by GABAergic synapses in CNS. 1997-1999 University of Wisconsin-Madison Madison, WI Postdoctoral Fellow Lu T, Trussell LO. “Inhibitory transmission mediated by asynchronous transmitter release.” Neuron. 2000; 26(3):683- 94. I demonstrated in a GABAergic synapse that asynchronous release might dominate inhibitory synaptic transmission with high level of activity. I also argued, by using pharmacological and modeling approaches, that asynchronous and synchronous releases may share in their respective pools of vesicles and exocytotic Ca++ sensors. The smooth inhibitory tone arising from the enhanced asynchronous release may help preserve the temporal precision of spiking for neurons in the auditory brainstem. The background and significance of this study was discussed in a Preview article in the same issue by Dr. Sacha Nelson of Brandeis University. 1991–1996 Shanghai Institute of Physiology, Chinese Academy of Sciences Shanghai, China Candidate for Ph.D. in Neurophysiology Shen Y, Lu T, and Yang XL. “Modulation of desensitization at glutamate receptors in isolated crucian carp horizontal cells by concanavalin A, cyclothiazide, aniracetam and PEPA.” Neuroscience. 1999; 89(3):979-90. Lu T, Shen Y, and Yang XL. “Desensitization of AMPA receptors on horizontal cells isolated from crucian carp retina.” Neuroscience Research. 1998; 31(2):123-35. Lu T, Yang XL. “The dissociation, morphology and physiological properties of retinal horizontal cells.” Chinese Journal of Neuroanatomy. 1995; 11(4):299-306. Education 1991-1996 Shanghai Institute of Physiology, Chinese Academy of Sciences Shanghai, China Ph.D. in Neurophysiology 1987-1991 Beijing University Beijing, China Bachelor in Science (Major: Physiology, Biophysics) (责任编辑:泉水) |