- Osmotic regulation of ion channels and vasopressin secretion
- Ca2+ channel targeting and function in neuroendocrine secretion
- Mechanisms and significance of gliotransmitter secretion
Neuroscience Research Group, Montreal General Hospital/McGill University, Montreal.
Department of Physiology and Biophysics, The Mayo Clinic, Rochester, MN, USA
Present Research Funding
- Ca2+ channel targeting in neuroendocrine cells, Natural Sciences and Engineering Research Council of Canada (2009-2014)
- Structural and functional adaptation of supraoptic neurons to sustained hyperosmolality, Canadian Institutes of Health Research Regional Partnership Program, including matching funds from the Saskatchewan Health Research Foundation (2009-2011)
- An osmosensitive K+ current that regulates vasopressin release, Heart and Stroke Foundation of Canada (2008-2011).
- Noradrenergic activation of glial release of ATP and its role in regulation of plasticity at hypothalamic glutamatergic synapses, Canadian Institutes of Health Research (2005-2010; co-investigator with J.S. Bains, University of Calgary)
People In The Lab
Current Graduate Student
Vimal Bansal - Expected Completion 2016
Xuan Vo "Ca2+ channel subunit composition in neuronal somata and terminals. Noradrenaline-evoked release of ATP from glial cells"
Former Graduate Students
|Daoyi Wang||Completed Feb 2011||"Ca2+ channel trafficking in neuroendocrine cells"|
|Naima Mumtaz||Completed Jan 2011||"Acute and chronic adaptation of supraoptic neurons to changes in osmolality"|
|Wenbo Zhang PhD||Completed 2009||"Characterization of a novel osmosensitive K+ current in supraoptic neurons"|
|Xiaoyu Xu MSc||Completed 2006||"CASK and Mint1 in Ca2+ channel clustering and function in chromaffin cells"|
|Blanc Star MSc||Completed 2005||"Dehydration increases the density of L-type Ca2+ channels in supraoptic neurons"|
|Xiaohong Liu MSc||Completed 2004||"An osmosensitive and voltage sensitive cation current in supraoptic neurons"|
Former Post-Doctoral Fellow
|Kosala Rajapaksha||2004-2006||"Alternative splicing of Ca2+ channel mRNA. Noradrenaline-evoked release of ATP from glial cells"|
Recent Summer Students
|Peter Rye*||2009||Mechanisms of osmotically-induced MNC hypertrophy.|
|Petra Dolman**||2008||Regulation of VP secretion during chronic dehydration.|
|Catherine Lacny||2008||Mechanisms underlying glial regulation of VP secretion.|
|Brent Wilkinson||2007||Osmotically-induced structural reorganization in the SON.|
|Jeff Wilkinson**||2007||Mechanisms underlying glial modulation of VP secretion.|
|Jeff Wilkinson*||2006||Mechanisms of NA-induced ATP release from glia.|
|Lauren Beliveau*||2005||Study of secretion from MNCs and glia using FM1-43.|
* Recipient of a NSERC Summer Research Award
** Recipient of a Heart & Stroke Foundation Summer Research Award
Honours and Awards for Lab Members
- Congratulations to Daoyi for having an image chosen for the cover of the Journal of Neuroendocrinology, October 2009!
- Congratulations to Daoyi on being chosen to represent the University of Saskatchewan at the CIHR Student Health Research Forum 2009!
- Congratulations to Wenbo on receiving a CIHR Canada Graduate Scholarship Doctoral Award, 2007-09!
APPLICATIONS FOR GRADUATE STUDENT AND POST-DOCTORAL POSITIONS WELCOME!
Wang, D, Yan, B, Rajapaksha, WRAKJS, and Fisher, TE (2009) Expression of voltage gated Ca2+ channels in glial cells of the rat neurohypophysis. Journal of Neuroendocrinology, in press.
Zhang, W, Wang, D, Liu, X-H, Rajapaksha, WRAKJS, and Fisher, TE (2009) An osmosensitive voltage gated K+current in rat supraoptic neurons. European Journal of Neuroscience, 29, 2335-2346.
Wang, D, Rajapaksha, WRAKJS, Davies, JN, Chen, L, Zamponi, GW, and Fisher, TE (2008) Novel splice variants of rat CaV2.1 that lack much of the synaptic protein interaction site are expressed in neuroendocrine cells. Journal of Biological Chemistry, 283, 15997-16003.
Zhang, W, Star, B, Rajapaksha, WRAKJS, and Fisher, TE (2007) Dehydration increases L-type Ca2+ current in rat supraoptic neurons. Journal of Physiology, 580, 181-193.
Liu, XH, Zhang, W, and Fisher, TE (2005) A novel osmosensitive voltage gated cation current in rat supraoptic neurones. Journal of Physiology, 568, 61-68.
Gordon, GRJ, Baimoukhametova, DV, Hewitt, SA, Rajapaksha, WRAKJS, Fisher, TE, and Bains, JS (2005) Noradrenaline triggers release of glial ATP to increase postsynaptic efficacy. Nature Neuroscience, 8, 1078-1086.
Fisher, TE, and Bourque, C. W. (2001) The function of Ca2+ channel subtypes in exocytotic secretion: new perspectives from synaptic and non-synaptic release Progress in Biophysics and Molecular Biology, 77, 269-303.
Fisher, TE, Marszalek, PE, and Fernandez, JM (2000) Stretching single protein and sugar molecules into novel conformations using the atomic force microscope Nature Structural Biology, 7,719-724.
Fisher, TE, Carrion-Vazquez, M, Oberhauser, AF, Li, H., Marszalek, PE, and Fernandez, JM (2000) Single molecule force spectroscopy of modular proteins in the nervous system. Neuron, 27, 435-446.
Fisher, TE, Carrion-Vazquez, M, and Fernandez, JM (2000) Ca2+ channel immunoreactivity on intracellular membranes in neuroendocrine axon terminals. FEBS Letters, 482, 131-138.
Fisher, TE, and Fernandez, JM (1999) Pulsed-laser imaging of Ca2+ influx in a neuroendocrine terminal. Journal of Neuroscience, 19, 7450-7457.
Wilson, GF, Richardson, FC, Fisher, TE, Olivera, BM, and Kaczmarek, LK (1996) Identification and characterization of a Ca2+-activated nonspecific cation channel and current underlying prolonged repetitive firing in Aplysia neurons.Journal of Neuroscience, 16, 3661-3671.
Fisher, TE and Bourque, CW (1996) Calcium channel subtypes in the somata and axon terminals of the magnocellular neurosecretory cells of the rat supraoptic nucleus. Trends in Neurosciences, 19, 440-4.
Fisher, TE and Bourque, CW (1995) Distinct w‑agatoxin‑sensitive calcium currents in the somata and axon terminals of a mammalian central neuron. Journal of Physiology 489.2, 383-388.
Fisher, TE and Bourque, CW (1995) Expression of voltage gated calcium channels in the magnocellular neurosecretory cells of the rat hypothalamus. Journal of Physiology 486.3, 571-580.