Ling-Gang Wu, M.D., Ph.D.
Synaptic Transmission Section
Building 35, Room 2B-1012
35 Convent Drive
Bethesda, MD 20892-3706
Exocytosis and endocytosis are two fundamental cellular processes in nearly all cells, including neurons. They underlie many important functions, such as intracellular trafficking, nutrient uptake, viral infection, hormone secretion, blood glucose regulation, and synaptic transmission that is essential for our brain functions. We aim at understanding vesicle exo- and endocytosis with respect to their dynamic structural changes, molecular mechanisms, and functions at the sub-vesicle resolution at millisecond time scale. We study the structural changes and molecular mechanisms that mediate fusion between two bilayer membranes, that open a fusion pore, that expand a fusion pore, that constrict a fusion or fission pore, that close a fusion or fission pore and that generate a membrane curvature. We study how these structural changes control release of vesicular contents and recycling of vesicles. We used a variety of advanced techniques, including confocal imaging, super-resolution STED imaging, super-resolution STORM imaging, molecular biological techniques, electron microscopy, and advanced electrophysiological techniques (e.g., whole-cell current and capacitance recordings, cell-attached single channel current and capacitance recordings). We used three preparations, the giant calyx of Held nerve terminal, the cultured hippocampal synapse and the neuroendocrine adrenal chromaffin cell.
The lab is constantly seeking highly talented and motivated postdoctoral candidates with experience in molecular biology (e.g., knockdown or knockout), cell biology (e.g., live-cell fluorescence imaging), electron microscopy, and/or electrophysiology. The lab is also seeking graduate students majored in Neurobiology, Cell Biology, Pharmacology, Genetics, and Biomedical Engineering, with an interest in exo- and endocytosis. Contact Dr. Wu for further information.
He L, Xue L, Xu J, McNeil BD, Bai L, Melicoff E, Adachi R, Wu LG. Compound vesicle fusion increases quantal size and potentiates synaptic transmission. Nature. 2009;459(7243):93-7.
Wu XS, Lee SH, Sheng J, Zhang Z, Zhao WD, Wang D, Jin Y, Charnay P, Ervasti JM, Wu LG. Actin Is Crucial for All Kinetically Distinguishable Forms of Endocytosis at Synapses. Neuron. 2016;92(5):1020-1035.
Sheng J, He L, Zheng H, Xue L, Luo F, Shin W, Sun T, Kuner T, Yue DT, Wu LG. Calcium-channel number critically influences synaptic strength and plasticity at the active zone. Nat Neurosci. 2012;15(7):998-1006.
Zhao WD, Hamid E, Shin W, Wen PJ, Krystofiak ES, Villarreal SA, Chiang HC, Kachar B, Wu LG. Hemi-fused structure mediates and controls fusion and fission in live cells. Nature. 2016;534(7608):548-52.
Chiang HC, Shin W, Zhao WD, Hamid E, Sheng J, Baydyuk M, Wen PJ, Jin A, Momboisse F, Wu LG. Post-fusion structural changes and their roles in exocytosis and endocytosis of dense-core vesicles. Nat Commun. 2014;5:3356.
Related Scientific Focus Areas
Biomedical Engineering and Biophysics
This page was last updated on May 3rd, 2017