Sebastian Barg
Professor at Department of Medical Cell Biology; Research Group Sebastian Barg
- Telephone:
- +46 18 471 46 60
- E-mail:
- sebastian.barg@mcb.uu.se
- Visiting address:
- BMC
Husargatan 3
751 23 Uppsala - Postal address:
- Box 571
751 23 UPPSALA
Short presentation
My research group studies the cell biology of insulin secretion using advanced light microscopy (TIRF, single molecule imaging) and patch clamp electrophysiology; a particular focus is on the regulated exocytosis of secretory granules. I teach cell biology and general endocrinology.
Biography
- 1995 MSc Biochemistry Free University Berlin
- 1995 undergraduate thesis Vanderbilt University (with Sid Fleischer)
- 2001 PhD Medical Sciences Lund University (with P Rorsman)
- 2002 Assistant professor (Swedish Science Council/Vetenskapsrådet)
- 2002-06 postdoc Vollum Institute Portland OR (with W Almers)
- 2007 research assistant professor Oregon Health & Science University
- 2007 lecturer Imperial College London
- 2008 Assistant professor Uppsala University
- 2016 Associate professor Uppsala University
- 2019 Professor Uppsala University
honors:
- 2001 best PhD thesis Medical faculty Lund
- 2002 Swedish Research Council (VR) assistant professor position
- 2002 EMBO longterm fellowship
- 2002 STINT fellowship award
- 2002 Swedish Society for Medical Research fellowship award
- 2002 Albert Renold Career Development Award (EFSD)
- 2005 Wallenberg fellowship award in Nano/micro Science
- 2008 Zetterling fellowship award
- 2008-11 Göran Gustafsson award in human biology

Publications
Selection of publications
Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
Part of Nature Communications, 2020
- DOI for Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
- Download full text (pdf) of Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
Part of eLIFE, 2019
- DOI for Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
- Download full text (pdf) of Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
Glucose-Dependent Granule Docking Limits Insulin Secretion and Is Decreased in Human Type 2 Diabetes
Part of Cell Metabolism, p. 470-478, 2018
Syntaxin clusters at secretory granules in a munc18-bound conformation
Part of Molecular Biology of the Cell, p. 2700-2708, 2018
- DOI for Syntaxin clusters at secretory granules in a munc18-bound conformation
- Download full text (pdf) of Syntaxin clusters at secretory granules in a munc18-bound conformation
Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
Part of Journal of Clinical Investigation, p. 2353-2364, 2017
- DOI for Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
- Download full text (pdf) of Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
Contact-induced clustering of syntaxin and munc18 docks secretory granules at the exocytosis site
Part of Nature Communications, 2014
Syntaxin clusters assemble reversibly at sites of secretory granules in live cells
Part of Proceedings of the National Academy of Sciences of the United States of America, p. 20804-20809, 2010
Part of Neuron, p. 287-299, 2002
Recent publications
Part of eLIFE, 2024
RFX6 haploinsufficiency predisposes to diabetes through impaired beta cell function
Part of Diabetologia, p. 1642-1662, 2024
- DOI for RFX6 haploinsufficiency predisposes to diabetes through impaired beta cell function
- Download full text (pdf) of RFX6 haploinsufficiency predisposes to diabetes through impaired beta cell function
The β-cell primary cilium is an autonomous Ca2+ compartment for paracrine GABA signaling
Part of Journal of Cell Biology, 2023
- DOI for The β-cell primary cilium is an autonomous Ca2+ compartment for paracrine GABA signaling
- Download full text (pdf) of The β-cell primary cilium is an autonomous Ca2+ compartment for paracrine GABA signaling
SEC14-like condensate phase transitions at plasma membranes regulate root growth in Arabidopsis
Part of PLoS biology, 2023
- DOI for SEC14-like condensate phase transitions at plasma membranes regulate root growth in Arabidopsis
- Download full text (pdf) of SEC14-like condensate phase transitions at plasma membranes regulate root growth in Arabidopsis
Restoration of PITPNA in Type 2 diabetic human islets reverses pancreatic beta-cell dysfunction
Part of Nature Communications, 2023
- DOI for Restoration of PITPNA in Type 2 diabetic human islets reverses pancreatic beta-cell dysfunction
- Download full text (pdf) of Restoration of PITPNA in Type 2 diabetic human islets reverses pancreatic beta-cell dysfunction
All publications
Articles in journal
Part of eLIFE, 2024
RFX6 haploinsufficiency predisposes to diabetes through impaired beta cell function
Part of Diabetologia, p. 1642-1662, 2024
- DOI for RFX6 haploinsufficiency predisposes to diabetes through impaired beta cell function
- Download full text (pdf) of RFX6 haploinsufficiency predisposes to diabetes through impaired beta cell function
The β-cell primary cilium is an autonomous Ca2+ compartment for paracrine GABA signaling
Part of Journal of Cell Biology, 2023
- DOI for The β-cell primary cilium is an autonomous Ca2+ compartment for paracrine GABA signaling
- Download full text (pdf) of The β-cell primary cilium is an autonomous Ca2+ compartment for paracrine GABA signaling
SEC14-like condensate phase transitions at plasma membranes regulate root growth in Arabidopsis
Part of PLoS biology, 2023
- DOI for SEC14-like condensate phase transitions at plasma membranes regulate root growth in Arabidopsis
- Download full text (pdf) of SEC14-like condensate phase transitions at plasma membranes regulate root growth in Arabidopsis
Restoration of PITPNA in Type 2 diabetic human islets reverses pancreatic beta-cell dysfunction
Part of Nature Communications, 2023
- DOI for Restoration of PITPNA in Type 2 diabetic human islets reverses pancreatic beta-cell dysfunction
- Download full text (pdf) of Restoration of PITPNA in Type 2 diabetic human islets reverses pancreatic beta-cell dysfunction
Local PI(4,5)P2 signaling inhibits fusion pore expansion during exocytosis
Part of Cell Reports, 2023
- DOI for Local PI(4,5)P2 signaling inhibits fusion pore expansion during exocytosis
- Download full text (pdf) of Local PI(4,5)P2 signaling inhibits fusion pore expansion during exocytosis
Part of Proceedings of the National Academy of Sciences of the United States of America, 2022
- DOI for Alternative splicing encodes functional intracellular CD59 isoforms that mediate insulin secretion and are down-regulated in diabetic islets
- Download full text (pdf) of Alternative splicing encodes functional intracellular CD59 isoforms that mediate insulin secretion and are down-regulated in diabetic islets
Part of Nature Biotechnology, p. 1042-1055, 2022
- DOI for Functional, metabolic and transcriptional maturation of human pancreatic islets derived from stem cells.
- Download full text (pdf) of Functional, metabolic and transcriptional maturation of human pancreatic islets derived from stem cells.
Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
Part of Nature Communications, 2020
- DOI for Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
- Download full text (pdf) of Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
Part of Proceedings of the National Academy of Sciences of the United States of America, p. 2484-2495, 2020
- DOI for In pancreatic islets from type 2 diabetes patients, the dampened circadian oscillators lead to reduced insulin and glucagon exocytosis
- Download full text (pdf) of In pancreatic islets from type 2 diabetes patients, the dampened circadian oscillators lead to reduced insulin and glucagon exocytosis
Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
Part of eLIFE, 2019
- DOI for Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
- Download full text (pdf) of Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
Part of Diabetes, p. 747-760, 2019
Functional Characterization of Native, High-Affinity GABAA Receptors in Human Pancreatic β Cells
Part of EBioMedicine, 2018
- DOI for Functional Characterization of Native, High-Affinity GABAA Receptors in Human Pancreatic β Cells
- Download full text (pdf) of Functional Characterization of Native, High-Affinity GABAA Receptors in Human Pancreatic β Cells
PtdIns(4,5)P2 is not required for secretory granule docking
Part of Traffic, p. 436-445, 2018
Glucose-Dependent Granule Docking Limits Insulin Secretion and Is Decreased in Human Type 2 Diabetes
Part of Cell Metabolism, p. 470-478, 2018
Syntaxin clusters at secretory granules in a munc18-bound conformation
Part of Molecular Biology of the Cell, p. 2700-2708, 2018
- DOI for Syntaxin clusters at secretory granules in a munc18-bound conformation
- Download full text (pdf) of Syntaxin clusters at secretory granules in a munc18-bound conformation
MiR-335 overexpression impairs insulin secretion through defective priming of insulin vesicles
Part of Physiological Reports, 2017
- DOI for MiR-335 overexpression impairs insulin secretion through defective priming of insulin vesicles
- Download full text (pdf) of MiR-335 overexpression impairs insulin secretion through defective priming of insulin vesicles
Recruitment of Epac2A to Insulin Granule Docking Sites Regulates Priming for Exocytosis
Part of Diabetes, p. 2610-2622, 2017
Plasma membrane PI(4,5)P-2 is critical for secretory granule exocytosis
Part of Molecular Biology of the Cell, p. 3727-3727, 2017
Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
Part of Journal of Clinical Investigation, p. 2353-2364, 2017
- DOI for Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
- Download full text (pdf) of Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
Part of PLOS ONE, 2016
- DOI for Statistical Frailty Modeling for Quantitative Analysis of Exocytotic Events Recorded by Live Cell Imaging: Rapid Release of Insulin-Containing Granules Is Impaired in Human Diabetic beta-cells
- Download full text (pdf) of Statistical Frailty Modeling for Quantitative Analysis of Exocytotic Events Recorded by Live Cell Imaging: Rapid Release of Insulin-Containing Granules Is Impaired in Human Diabetic beta-cells
Part of CELL CHEMICAL BIOLOGY, p. 816-826, 2016
How Kiss-and-Run Can Make Us Sick: SOX4 Puts a Break on the Pore
Part of Diabetes, p. 1791-1793, 2016
Quantitative Imaging of the Exocytosis Machinery Assembly
Part of Biophysical Journal, 2015
Survey of Red Fluorescence Proteins as Markers for Secretory Granule Exocytosis
Part of PLOS ONE, 2015
- DOI for Survey of Red Fluorescence Proteins as Markers for Secretory Granule Exocytosis
- Download full text (pdf) of Survey of Red Fluorescence Proteins as Markers for Secretory Granule Exocytosis
Part of Diabetologia, 2015
G-protein coupled receptor dynamics in insulin secreting cells
Part of Diabetologia, 2015
CD59 is required for pancreatic beta cell insulin exocytosis
Part of Molecular Immunology, p. 279-279, 2014
Contact-induced clustering of syntaxin and munc18 docks secretory granules at the exocytosis site
Part of Nature Communications, 2014
The Complement Inhibitor CD59 Regulates Insulin Secretion by Modulating Exocytotic Events
Part of Cell Metabolism, p. 883-890, 2014
Part of PLOS ONE, 2013
- DOI for In Intact Islets Interstitial GABA Activates GABA(A) Receptors That Generate Tonic Currents in alpha-Cells
- Download full text (pdf) of In Intact Islets Interstitial GABA Activates GABA(A) Receptors That Generate Tonic Currents in alpha-Cells
Part of Cellular Signalling, p. 85-92, 2013
- DOI for Aberrant association between vascular endothelial growth factor receptor-2 and VE-cadherin in response to vascular endothelial growth factor-a in Shb-deficient lung endothelial cells
- Download full text (pdf) of Aberrant association between vascular endothelial growth factor receptor-2 and VE-cadherin in response to vascular endothelial growth factor-a in Shb-deficient lung endothelial cells
Multivesicular exocytosis in rat pancreatic beta cells
Part of Diabetologia, p. 1001-1012, 2012
PPARβ/δ affects pancreatic β cell mass and insulin secretion in mice
Part of Journal of Clinical Investigation, p. 4105-4117, 2012
cAMP Mediators of Pulsatile Insulin Secretion from Glucose-stimulated Single β-Cells
Part of Journal of Biological Chemistry, p. 23005-23016, 2010
Quantitative analysis of t-SNARE and Ca2+-channel clusters near secretory granules
Part of Diabetologia, 2010
Defective secretion of islet hormones in chromogranin-B deficient mice
Part of PLOS ONE, 2010
Part of Proceedings of the National Academy of Sciences of the United States of America, p. 20810-20815, 2010
Syntaxin clusters assemble reversibly at sites of secretory granules in live cells
Part of Proceedings of the National Academy of Sciences of the United States of America, p. 20804-20809, 2010
Impaired glucose homeostasis in Shb-/- mice
Part of Journal of Endocrinology, p. 271-279, 2009
TCF7L2 regulates late events in insulin secretion from pancreatic islet beta-cells
Part of Diabetes, p. 894-905, 2009
Part of Biochemical and Biophysical Research Communications - BBRC, p. 241-246, 2009
Release of the styryl dyes from single synaptic vesicles in hippocampal neurons.
Part of The Journal of neuroscience : the official journal of the Society for Neuroscience, p. 1894-1903, 2008
- DOI for Release of the styryl dyes from single synaptic vesicles in hippocampal neurons.
- Download full text (pdf) of Release of the styryl dyes from single synaptic vesicles in hippocampal neurons.
Granule docking and cargo release in pancreatic β-cells
Part of Biochemical Society Transactions, p. 294-299, 2008
Selective nucleotide-release from dense-core granules in insulin-secreting cells
Part of Journal of Cell Science, p. 4271-82, 2005
- DOI for Selective nucleotide-release from dense-core granules in insulin-secreting cells
- Download full text (pdf) of Selective nucleotide-release from dense-core granules in insulin-secreting cells
Part of Diabetes, p. 2852-8, 2005
Large dense-core vesicle exocytosis in pancreatic beta-cells monitored by capacitance measurements.
Part of Methods, p. 302-11, 2004
Insulin secretion: a high-affinity Ca2+ sensor after all?
Part of The Journal of General Physiology, p. 623-5, 2004
SUR1 regulates PKA-independent cAMP-induced granule priming in mouse pancreatic B-cells.
Part of The Journal of General Physiology, p. 181-97, 2003
Mechanisms of exocytosis in insulin-secreting B-cells and glucagon-secreting A-cells.
Part of Pharmacology and Toxicology, p. 3-13, 2003
Characterization of a naturally occurring mutation (L107I) in the HNF1 alpha (MODY3) gene.
Part of Diabetologia, p. 1703-8, 2002
Part of Neuron, p. 287-299, 2002
Part of Diabetes, 2002
Fast insulin secretion reflects exocytosis of docked granules in mouse pancreatic B-cells.
Part of Pflügers Archiv, p. 43-51, 2002
Part of Journal of Membrane Biology, p. 51-64, 2002
Effect of mutant alpha-synuclein on dopamine homeostasis in a new human mesencephalic cell line.
Part of Journal of Biological Chemistry, p. 38884-94, 2002
Part of Diabetes, 2002
Priming of insulin granules for exocytosis by granular Cl(-) uptake and acidification
Part of Journal of Cell Science, p. 2145-54, 2001
Fast exocytosis with few Ca(2+) channels in insulin-secreting mouse pancreatic B cells
Part of Biophysical Journal, p. 3308-23, 2001
The Cell Physiology of Biphasic Insulin Secretion.
Part of News in Physiological Sciences - NIPS, p. 72-77, 2000
Patch-clamp characterisation of somatostatin-secreting -cells in intact mouse pancreatic islets.
Part of Journal of Physiology, p. 497-507, 2000
Part of Journal of Physiology, p. 509-20, 2000
Tight coupling between electrical activity and exocytosis in mouse glucagon-secreting alpha-cells.
Part of Diabetes, p. 1500-10, 2000
Part of Journal of Physiology, p. 109-20, 2000
Voltage-gated and resting membrane currents recorded from B-cells in intact mouse pancreatic islets.
Part of Journal of Physiology, p. 717-28, 1999
Part of The Journal of General Physiology, p. 759-70, 1999
The voltage sensitive Lc-type Ca2+ channel is functionally coupled to the exocytotic machinery.
Part of Proceedings of the National Academy of Sciences of the United States of America, p. 248-53, 1999
Part of Proceedings of the National Academy of Sciences of the United States of America, p. 5539-44, 1999
Part of The Journal of General Physiology, p. 217-28, 1997
Part of Pflügers Archiv, p. 515-24, 1997
Heterogeneity of Ca2+ gating of skeletal muscle and cardiac ryanodine receptors.
Part of Biophysical Journal, p. 141-56, 1997
Part of American Journal of Physiology, 1997
Selective binding of FKBP12.6 by the cardiac ryanodine receptor.
Part of Journal of Biological Chemistry, p. 20385-91, 1996
Articles, review/survey
Compensatory endocytosis in chromaffin cells
Part of Acta Physiologica, p. 195-201, 2008