Posts classified under: S

Felix Schweizer, Ph.D.

Biography

Felix E. Schweizer was born in Basel, Switzerland and conducted his graduate research in the laboratory of Prof. Max M. Burger under the direction of Dr. Theo Schafer. He received his PhD degree in biochemistry summa cum laude from the University of Basel in 1989. From 1990 to 1994, he was a post-doctoral fellow in the Department of Molecular and Cellular Physiology at Stanford University in the laboratory of Prof. Richard W. Tsien. From 1994 to 1998, he was postdoctoral fellow in the Department of Neurobiology at Duke University in the laboratory of Professor George J. Augustine. Dr. Schweizer joined the Department of Neurobiology in the David Geffen School of Medicine at UCLA in 1998 as Assistant Professor and was promoted to Full Professor in 2010. Dr. Schweizer’s research interests concern the molecular mechanisms by which neurons communicate, the regulation of communication by neurons and how alterations in neuronal communication might contribute to neuronal diseases. The Schweizer laboratory uses electrophysiological and optical tools to investigate the dynamic molecular mechanisms underlying the regulation of neurotransmitter release. We are particularly interested in the role of protein ubiquitination in regulating neuronal excitability and synaptic transmission. In collaboration with Dr. James Wohlschlegel, we used multiplexed SILAC and identified synaptic proteins that are dynamically regulated. More recently, in collaboration with Dr. David Krantz, we are using pesticides linked to neuro-degenerative disorders as unbiased tools identify novel pathways that might be involved in early signs of degeneration. In addition, we are characterizing transmission at the first synapse of the vestibular system, i.e. between utricular sensory hair cells and primary afferent neurons. In collaboration with Dr. Larry Hoffman we are finding that changing the gravitational load alters synaptic structures. We are now using serial EM and EM tomography in addition to physiology and cell biology to define in more detail the transfer function between head-movement input and afferent nerve-firing output.

Alvaro Sagasti, Ph.D.

Biography

Dr. Sagasti received his PhD from UCSF, where he worked with Cori Bargmann studying celll specification and left/right asymmetry in the nervous system of the nematode C. elegans. He began using zebrafish as a model at the Skirball Institute, NYU Medical Center as a post-doc with Alex Schier. In the summer of 2005 he was a Grass Foundation Fellow at the Marine Biological Labs in Woods Hole, Massachussetts. He began as a UCLA faculty member in the MCDB department in September 2005. His lab uses a combination of imaging, molecular, and genetic approaches in zebrafish to investigate on the morphogenesis of sensory axons and skin cells during development and repair.

Publications

A selected list of publications:

Vargas Mauricio Enrique, Yamagishi Yuya, Tessier-Lavigne Marc, Sagasti Alvaro   Live Imaging of Calcium Dynamics during Axon Degeneration Reveals Two Functionally Distinct Phases of Calcium Influx The Journal of neuroscience : the official journal of the Society for Neuroscience, 2015; 35(45): 15026-38.
Rasmussen Jeffrey P, Sack Georgeann S, Martin Seanna M, Sagasti Alvaro   Vertebrate epidermal cells are broad-specificity phagocytes that clear sensory axon debris The Journal of neuroscience : the official journal of the Society for Neuroscience, 2015; 35(2): 559-70.
O’Donnell Kelley C, Lulla Aaron, Stahl Mark C, Wheat Nickolas D, Bronstein Jeff M, Sagasti Alvaro   Axon degeneration and PGC-1α-mediated protection in a zebrafish model of α-synuclein toxicity Disease models & mechanisms, 2014; 7(5): 571-82.
O’Donnell Kelley C, Vargas Mauricio E, Sagasti Alvaro   WldS and PGC-1α regulate mitochondrial transport and oxidation state after axonal injury The Journal of neuroscience : the official journal of the Society for Neuroscience, 2013; 33(37): 14778-90.
Palanca Ana Marie S, Lee Sung-Ling, Yee Laura E, Joe-Wong Carlee, Trinh Le A, Hiroyasu Elizabeth, Husain Majid, Fraser Scott E, Pellegrini Matteo, Sagasti Alvaro   New transgenic reporters identify somatosensory neuron subtypes in larval zebrafish Developmental neurobiology, 2013; 73(2): 152-67.
Villegas Rosario, Martin Seanna M, O’Donnell Kelley C, Carrillo Simon A, Sagasti Alvaro, Allende Miguel L   Dynamics of degeneration and regeneration in developing zebrafish peripheral axons reveals a requirement for extrinsic cell types Neural development, 2012; 7(6): 19.
O’Brien Georgeann S, Rieger Sandra, Wang Fang, Smolen Gromoslaw A, Gonzalez Robert E, Buchanan JoAnn, Sagasti Alvaro   Coordinate development of skin cells and cutaneous sensory axons in zebrafish The Journal of comparative neurology, 2012; 520(4): 816-31.
Wang Fang, Wolfson Sean N, Gharib Arash, Sagasti Alvaro   LAR receptor tyrosine phosphatases and HSPGs guide peripheral sensory axons to the skin Current biology : CB, 2012; 22(5): 373-82.
Rieger Sandra, Sagasti Alvaro   Hydrogen peroxide promotes injury-induced peripheral sensory axon regeneration in the zebrafish skin PLoS biology, 2011; 9(5): e1000621.
Martin Seanna M, O’Brien Georgeann S, Portera-Cailliau Carlos, Sagasti Alvaro   Wallerian degeneration of zebrafish trigeminal axons in the skin is required for regeneration and developmental pruning Development (Cambridge, England), 2010; 137(23): 3985-94.
O’Brien Georgeann S, Martin Seanna M, Söllner Christian, Wright Gavin J, Becker Catherina G, Portera-Cailliau Carlos, Sagasti Alvaro   Developmentally regulated impediments to skin reinnervation by injured peripheral sensory axon terminals Current biology : CB, 2009; 19(24): 2086-90.
Sagasti, A Guido, MR Raible, DW Schier, AF.   Repulsive interactions shape the morphologies and functional arrangement of zebrafish peripheral sensory arbors Current biology , 2005; 15(9): 804-14.

Stephanie Seidlits, Ph.D.

Publications

A selected list of publications:

Walthers Christopher M, Seidlits Stephanie K   Gene delivery strategies to promote spinal cord repair Biomarker insights, 2015; 10(Suppl 1): 11-29.
Thomas Aline M, Seidlits Stephanie K, Goodman Ashley G, Kukushliev Todor V, Hassani Donna M, Cummings Brian J, Anderson Aileen J, Shea Lonnie D   Sonic hedgehog and neurotrophin-3 increase oligodendrocyte numbers and myelination after spinal cord injury Integrative biology : quantitative biosciences from nano to macro, 2014; 6(7): 694-705.
Seidlits Stephanie K, Gower Robert Michael, Shepard Jaclyn A, Shea Lonnie D   Hydrogels for lentiviral gene delivery Expert opinion on drug delivery, 2013; 10(4): 499-509.
Thomas Aline M, Kubilius Matthew B, Holland Samantha J, Seidlits Stephanie K, Boehler Ryan M, Anderson Aileen J, Cummings Brian J, Shea Lonnie D   Channel density and porosity of degradable bridging scaffolds on axon growth after spinal injury Biomaterials, 2013; 34(9): 2213-20.
Khaing Zin Z, Milman Brian D, Vanscoy Jennifer E, Seidlits Stephanie K, Grill Raymond J, Schmidt Christine E   High molecular weight hyaluronic acid limits astrocyte activation and scar formation after spinal cord injury Journal of neural engineering, 2011; 8(4): 046033.
Seidlits Stephanie K, Drinnan Charles T, Petersen Rebecca R, Shear Jason B, Suggs Laura J, Schmidt Christine E   Fibronectin-hyaluronic acid composite hydrogels for three-dimensional endothelial cell culture Acta biomaterialia, 2011; 7(6): 2401-9.
Yang Youjun, Seidlits Stephanie K, Adams Michelle M, Lynch Vincent M, Schmidt Christine E, Anslyn Eric V, Shear Jason B   A highly selective low-background fluorescent imaging agent for nitric oxide Journal of the American Chemical Society, 2010; 132(38): 13114-6.
Seidlits Stephanie K, Khaing Zin Z, Petersen Rebecca R, Nickels Jonathan D, Vanscoy Jennifer E, Shear Jason B, Schmidt Christine E   The effects of hyaluronic acid hydrogels with tunable mechanical properties on neural progenitor cell differentiation Biomaterials, 2010; 31(14): 3930-40.
Kijanka Gregor, Barry Richard, Chen Hong, Gould Edith, Seidlits Stephanie K, Schmid Jasmin, Morgan Maria, Mason David Y, Cordell Jacqueline, Murphy Derek   Defining the molecular target of an antibody derived from nuclear extract of Jurkat cells using protein arrays Analytical biochemistry, 2009; 395(2): 119-24.
Seidlits Stephanie K, Lee Jae Y, Schmidt Christine E   Nanostructured scaffolds for neural applications Nanomedicine (London, England), 2008; 3(2): 183-99.
Kasper F Kurtis, Seidlits Stephanie K, Tang Andrew, Crowther Roger S, Carney Darrell H, Barry Michael A, Mikos Antonios G   In vitro release of plasmid DNA from oligo(poly(ethylene glycol) fumarate) hydrogels Journal of controlled release : official journal of the Controlled Release Society, 2005; 104(3): 521-39.
Seidlits Stephanie K, Reza Tammie, Briand Kevin A, Sereno Anne B   Voluntary spatial attention has different effects on voluntary and reflexive saccades TheScientificWorldJournal, 2003; 3(3): 881-902.