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Professor Jean-Claude Baron

University Position
Professor

Interests

My research focuses on the pathophysiology of ischaemic stroke and the mechanisms underlying subsequent deterioration or recovery, including neuronal damage, tissue inflammation and long-term plasticity processes. In terms of methodology, my approach is characterized by 1) combining brain imaging, both structural and functional (PET and fMRI) and assessment of performance measured using behavioural, cognitive or psychophysical tools; and 2) undertaking parallel studies in stroke patients and animal models, in the latter including microPET, in vitro autoradiographic and post mortem histopathologic techniques to inform the human studies.

Key Publications

Parametric mapping of [18F]fluoromisonidazole positron emission tomography using basis functions.

DOI: http://doi.org/10.1038/jcbfm.2010.141
Journal: J Cereb Blood Flow Metab
E-pub date: 1 Feb 2011
Authors: YT Hong, JS Beech, R Smith, J-C Baron, TD Fryer

Nucleus accumbens D2/3 receptors predict trait impulsivity and cocaine reinforcement.

DOI: http://doi.org/10.1126/science.1137073
Journal: Science
E-pub date: 2 Mar 2007
Authors: JW Dalley, TD Fryer, L Brichard, ESJ Robinson, DEH Theobald, K Lääne, Y Peña, ER Murphy, Y Shah, K Probst, I Abakumova, FI Aigbirhio, HK Richards, Y Hong, J-C Baron, BJ Everitt, TW Robbins

Publications

Early-stage 11C-Flumazenil PET predicts day-14 selective neuronal loss in a rodent model of transient focal cerebral ischemia.

DOI: http://doi.org/10.1177/0271678X19883040
Journal: J Cereb Blood Flow Metab
E-pub date: 1 Oct 2020
Authors: JL Hughes, JS Beech, PS Jones, D Wang, DK Menon, FI Aigbirhio, TD Fryer, J-C Baron

Assessing the Effects of Cytoprotectants on Selective Neuronal Loss, Sensorimotor Deficit and Microglial Activation after Temporary Middle Cerebral Occlusion.

DOI: http://doi.org/10.3390/brainsci9100287
Journal: Brain Sci
E-pub date: 22 Oct 2019
Authors: JV Emmrich, S Ejaz, DJ Williamson, YT Hong, S Sitnikov, TD Fryer, FI Aigbirhio, H Wulff, J-C Baron

Relationships between selective neuronal loss and microglial activation after ischaemic stroke in man.

DOI: http://doi.org/10.1093/brain/awy121
Journal: Brain
E-pub date: 1 Jul 2018
Authors: RS Morris, P Simon Jones, JA Alawneh, YT Hong, TD Fryer, FI Aigbirhio, EA Warburton, J-C Baron

Brain hypoxia mapping in acute stroke: Back-to-back T2′ MR versus 18F-fluoromisonidazole PET in rodents.

DOI: http://doi.org/10.1177/1747493017706221
Journal: Int J Stroke
E-pub date: 1 Oct 2017
Authors: U Jensen-Kondering, R Manavaki, S Ejaz, SJ Sawiak, TA Carpenter, TD Fryer, FI Aigbirhio, DJ Williamson, J-C Baron

Effects of hyperoxia on 18F-fluoro-misonidazole brain uptake and tissue oxygen tension following middle cerebral artery occlusion in rodents: Pilot studies.

DOI: http://doi.org/10.1371/journal.pone.0187087
Journal: PLoS One
E-pub date: 1 Aug 2017
Authors: TD Fryer, S Ejaz, U Jensen-Kondering, DJ Williamson, S Sitnikov, SJ Sawiak, FI Aigbirhio, YT Hong, J-C Baron

Normobaric hyperoxia markedly reduces brain damage and sensorimotor deficits following brief focal ischaemia.

DOI: http://doi.org/10.1093/brain/awv391
Journal: Brain
E-pub date: 1 Mar 2016
Authors: S Ejaz, JV Emmrich, SL Sitnikov, YT Hong, SJ Sawiak, TD Fryer, FI Aigbirhio, DJ Williamson, J-C Baron

Does stroke location predict walk speed response to gait rehabilitation?

DOI: http://doi.org/10.1002/hbm.23059
Journal: Hum Brain Mapp
E-pub date: 1 Feb 2016
Authors: PS Jones, VM Pomeroy, J Wang, G Schlaug, S Tulasi Marrapu, S Geva, PJ Rowe, E Chandler, A Kerr, J-C Baron, SWIFT-Cast investigators

Is CT-Based Perfusion and Collateral Imaging Sensitive to Time Since Stroke Onset?

DOI: http://doi.org/10.3389/fneur.2015.00070
Journal: Front Neurol
E-pub date: 1 Aug 2015
Authors: S Agarwal, T Matys, ST Marrapu, DJ Scoffings, J Mitchell, PS Jones, J-C Baron, EA Warburton

Early-Phase 11C-PiB PET in Amyloid Angiopathy-Related Symptomatic Cerebral Hemorrhage: Potential Diagnostic Value?

DOI: http://doi.org/10.1371/journal.pone.0139926
Journal: PLoS One
E-pub date: 1 Aug 2015
Authors: K Farid, YT Hong, FI Aigbirhio, TD Fryer, DK Menon, EA Warburton, J-C Baron

White matter perivascular spaces on magnetic resonance imaging: marker of cerebrovascular amyloid burden?

DOI: http://doi.org/10.1161/STROKEAHA.115.009090
Journal: Stroke
E-pub date: 1 Jun 2015
Authors: A Charidimou, YT Hong, HR Jäger, Z Fox, FI Aigbirhio, TD Fryer, DK Menon, EA Warburton, DJ Werring, J-C Baron

Diffusion and perfusion correlates of the 18F-MISO PET lesion in acute stroke: pilot study.

DOI: http://doi.org/10.1007/s00259-013-2581-x
Journal: Eur J Nucl Med Mol Imaging
E-pub date: 1 Apr 2014
Authors: JA Alawneh, RR Moustafa, ST Marrapu, U Jensen-Kondering, RS Morris, PS Jones, FI Aigbirhio, TD Fryer, TA Carpenter, EA Warburton, J-C Baron

Amyloid imaging with carbon 11-labeled Pittsburgh compound B for traumatic brain injury.

DOI: http://doi.org/10.1001/jamaneurol.2013.4847
Journal: JAMA Neurol
E-pub date: 1 Jan 2014
Authors: YT Hong, T Veenith, D Dewar, JG Outtrim, V Mani, C Williams, S Pimlott, PJA Hutchinson, A Tavares, R Canales, CA Mathis, WE Klunk, FI Aigbirhio, JP Coles, J-C Baron, JD Pickard, TD Fryer, W Stewart, DK Menon

Diagnostic utility of amyloid PET in cerebral amyloid angiopathy-related symptomatic intracerebral hemorrhage.

DOI: http://doi.org/10.1038/jcbfm.2014.43
Journal: Journal of Cerebral Blood Flow and Metabolism
E-pub date: 1 Jan 2014
Authors: J-C Baron, K Farid, E Dolan, G Turc, ST Marrapu, E O'Brien, FI Aigbirhio, TD Fryer, DK Menon, EA Warburton, YT Hong

A positron emission tomography study of nigro-striatal dopaminergic mechanisms underlying attention: implications for ADHD and its treatment.

DOI: http://doi.org/10.1093/brain/awt263
Journal: Brain
E-pub date: 10 Oct 2013
Authors: N del Campo, TD Fryer, YT Hong, R Smith, L Brichard, J Acosta-Cabronero, SR Chamberlain, R Tait, D Izquierdo, R Regenthal, J Dowson, J Suckling, J-C Baron, FI Aigbirhio, TW Robbins, BJ Sahakian, U Müller

Is neural activation within the rescued penumbra impeded by selective neuronal loss?

DOI: http://doi.org/10.1093/brain/awt112
Journal: Brain
E-pub date: 1 Jun 2013
Authors: E Carrera, PS Jones, RS Morris, J Alawneh, YT Hong, FI Aigbirhio, TD Fryer, TA Carpenter, EA Warburton, J-C Baron

Radiosynthesis and characterization of astemizole derivatives as lead compounds toward PET imaging of τ-pathology

DOI: http://doi.org/10.1039/c3md00017f
Journal: MedChemComm
E-pub date: 1 May 2013
Authors: PJ Riss, L Brichard, V Ferrari, DJ Williamson, TD Fryer, YT Hong, JC Baron, FI Aigbirhio

A comparison of four PET tracers for brain hypoxia mapping in a rodent model of stroke.

DOI: http://doi.org/10.1016/j.nucmedbio.2012.11.012
Journal: Nucl Med Biol
E-pub date: 1 Apr 2013
Authors: DJ Williamson, S Ejaz, S Sitnikov, TD Fryer, SJ Sawiak, P Burke, J-C Baron, FI Aigbirhio

Characterizing infarction and selective neuronal loss following temporary focal cerebral ischemia in the rat: a multi-modality imaging study.

DOI: http://doi.org/10.1016/j.nbd.2012.11.002
Journal: Neurobiol Dis
E-pub date: 1 Mar 2013
Authors: S Ejaz, DJ Williamson, T Ahmed, S Sitnikov, YT Hong, SJ Sawiak, TD Fryer, FI Aigbirhio, J-C Baron

A comparison of VLSM and VBM in a cohort of patients with post-stroke aphasia.

DOI: http://doi.org/10.1016/j.nicl.2012.08.003
Journal: Neuroimage Clin
E-pub date: 1 Aug 2012
Authors: S Geva, J-C Baron, PS Jones, CJ Price, EA Warburton

Validation and quantification of [18F]altanserin binding in the rat brain using blood input and reference tissue modeling.

DOI: http://doi.org/10.1038/jcbfm.2011.94
Journal: J Cereb Blood Flow Metab
E-pub date: 1 Dec 2011
Authors: PJ Riss, YT Hong, D Williamson, D Caprioli, S Sitnikov, V Ferrari, SJ Sawiak, J-C Baron, JW Dalley, TD Fryer, FI Aigbirhio

Microembolism versus hemodynamic impairment in rosary-like deep watershed infarcts: a combined positron emission tomography and transcranial Doppler study.

DOI: http://doi.org/10.1161/STROKEAHA.111.616334
Journal: Stroke
E-pub date: 1 Nov 2011
Authors: RR Moustafa, I Momjian-Mayor, PS Jones, S Morbelli, DJ Day, FI Aigbirhio, TD Fryer, EA Warburton, J-C Baron

The neural correlates of inner speech defined by voxel-based lesion-symptom mapping.

DOI: http://doi.org/10.1093/brain/awr232
Journal: Brain
E-pub date: 1 Oct 2011
Authors: S Geva, PS Jones, JT Crinion, CJ Price, J-C Baron, EA Warburton

Using positron emission tomography and Carbon 11-labeled Pittsburgh Compound B to image Brain Fibrillar β-amyloid in adults with down syndrome: safety, acceptability, and feasibility.

DOI: http://doi.org/10.1001/archneurol.2011.36
Journal: Arch Neurol
E-pub date: 1 Jul 2011
Authors: J Landt, JC D'Abrera, AJ Holland, FI Aigbirhio, TD Fryer, R Canales, YT Hong, DK Menon, J-C Baron, SH Zaman

Predicting infarction within the diffusion-weighted imaging lesion: does the mean transit time have added value?

DOI: http://doi.org/10.1161/STROKEAHA.110.606970
Journal: Stroke
E-pub date: 1 Jun 2011
Authors: E Carrera, PS Jones, JA Alawneh, I Klærke Mikkelsen, T-H Cho, S Siemonsen, JV Guadagno, K Mouridsen, L Ribe, N Hjort, TD Fryer, TA Carpenter, FI Aigbirhio, J Fiehler, N Nighoghossian, EA Warburton, L Ostergaard, J-C Baron

Single-subject statistical mapping of acute brain hypoxia in the rat following middle cerebral artery occlusion: a microPET study.

DOI: http://doi.org/10.1016/j.expneurol.2011.02.005
Journal: Experimental Neurology
E-pub date: 1 Jun 2011
Authors: M Takasawa, JS Beech, TD Fryer, PS Jones, T Ahmed, R Smith, FI Aigbirhio, J-C Baron

The vascular mean transit time: a surrogate for the penumbra flow threshold?

DOI: http://doi.org/10.1038/jcbfm.2010.197
Journal: Journal of Cerebral Blood Flow and Metabolism
E-pub date: 1 Apr 2011
Authors: E Carrera, PS Jones, S Iglesias, JV Guadagno, EA Warburton, TD Fryer, FI Aigbirhio, J-C Baron

Carotid plaque inflammation is associated with cerebral microembolism in patients with recent transient ischemic attack or stroke: a pilot study.

DOI: http://doi.org/10.1161/CIRCIMAGING.110.938225
Journal: Circ Cardiovasc Imaging
E-pub date: 1 Sep 2010
Authors: RR Moustafa, D Izquierdo-Garcia, TD Fryer, MJ Graves, JHF Rudd, JH Gillard, PL Weissberg, J-C Baron, EA Warburton

Watershed infarcts in transient ischemic attack/minor stroke with > or = 50% carotid stenosis: hemodynamic or embolic?

DOI: http://doi.org/10.1161/STROKEAHA.110.580415
Journal: Stroke
E-pub date: 1 Jul 2010
Authors: RR Moustafa, D Izquierdo-Garcia, PS Jones, MJ Graves, TD Fryer, JH Gillard, EA Warburton, J-C Baron

Benzodiazepine binding site occupancy by the novel GABAA receptor subtype-selective drug 7-(1,1-dimethylethyl)-6-(2-ethyl-2H-1,2,4-triazol-3-ylmethoxy)-3-(2-fluorophenyl)-1,2,4-triazolo[4,3-b]pyridazine (TPA023) in rats, primates, and humans.

DOI: http://doi.org/10.1124/jpet.109.157909
Journal: J Pharmacol Exp Ther
E-pub date: 1 Jan 2010
Authors: JR Atack, DF Wong, TD Fryer, C Ryan, S Sanabria, Y Zhou, RF Dannals, W-S Eng, RE Gibson, HD Burns, JM Vega, L Vessy, P Scott-Stevens, JS Beech, J-C Baron, B Sohal, ML Schrag, FI Aigbirhio, RM McKernan, RJ Hargreaves

T2*-weighted MRI versus oxygen extraction fraction PET in acute stroke.

DOI: http://doi.org/10.1159/000229017
Journal: Cerebrovasc Dis
E-pub date: 1 Aug 2009
Authors: ML Donswijk, PS Jones, JV Guadagno, TA Carpenter, RR Moustafa, TD Fryer, FI Aigbirhio, EA Warburton, JC Baron

Modelling human drug abuse and addiction with dedicated small animal positron emission tomography.

DOI: http://doi.org/10.1016/j.neuropharm.2008.05.029
Journal: Neuropharmacology
E-pub date: 1 Aug 2009
Authors: JW Dalley, TD Fryer, FI Aigbirhio, L Brichard, HK Richards, YT Hong, J-C Baron, BJ Everitt, TW Robbins

Dopamine release in dissociable striatal subregions predicts the different effects of oral methylphenidate on reversal learning and spatial working memory.

DOI: http://doi.org/10.1523/JNEUROSCI.3266-08.2009
Journal: J Neurosci
E-pub date: 15 Apr 2009
Authors: PL Clatworthy, SJG Lewis, L Brichard, YT Hong, D Izquierdo, L Clark, R Cools, FI Aigbirhio, J-C Baron, TD Fryer, TW Robbins

Selective neuronal loss in rescued penumbra relates to initial hypoperfusion.

DOI: http://doi.org/10.1093/brain/awn175
Journal: Brain
E-pub date: 1 Oct 2008
Authors: JV Guadagno, PS Jones, FI Aigbirhio, D Wang, TD Fryer, DJ Day, N Antoun, I Nimmo-Smith, EA Warburton, JC Baron

How reliable is perfusion MR in acute stroke? Validation and determination of the penumbra threshold against quantitative PET.

DOI: http://doi.org/10.1161/STROKEAHA.107.500090
Journal: Stroke
E-pub date: 1 Mar 2008
Authors: M Takasawa, PS Jones, JV Guadagno, S Christensen, TD Fryer, S Harding, JH Gillard, GB Williams, FI Aigbirhio, EA Warburton, L Østergaard, J-C Baron

Imaging of brain hypoxia in permanent and temporary middle cerebral artery occlusion in the rat using 18F-fluoromisonidazole and positron emission tomography: a pilot study.

DOI: http://doi.org/10.1038/sj.jcbfm.9600405
Journal: J Cereb Blood Flow Metab
E-pub date: 1 Apr 2007
Authors: M Takasawa, JS Beech, TD Fryer, YT Hong, JL Hughes, K Igase, PS Jones, R Smith, FI Aigbirhio, DK Menon, JC Clark, J-C Baron

How affected is oxygen metabolism in DWI lesions?: A combined acute stroke PET-MR study.

DOI: http://doi.org/10.1212/01.wnl.0000233984.66907.db
Journal: Neurology
E-pub date: 12 Sep 2006
Authors: JV Guadagno, EA Warburton, PS Jones, DJ Day, FI Aigbirhio, TD Fryer, S Harding, CJ Price, HA Green, O Barret, JH Gillard, J-C Baron

Local relationships between restricted water diffusion and oxygen consumption in the ischemic human brain.

DOI: http://doi.org/10.1161/01.STR.0000232437.00621.86
Journal: Stroke
E-pub date: 1 Jul 2006
Authors: JV Guadagno, PS Jones, TD Fryer, O Barret, FI Aigbirhio, TA Carpenter, CJ Price, JH Gillard, EA Warburton, J-C Baron

Intrinsic activated microglia map to the peri-infarct zone in the subacute phase of ischemic stroke.

DOI: http://doi.org/10.1161/01.STR.0000226980.95389.0b
Journal: Stroke
E-pub date: 1 Jul 2006
Authors: CJS Price, D Wang, DK Menon, JV Guadagno, M Cleij, T Fryer, F Aigbirhio, J-C Baron, EA Warburton

The diffusion-weighted lesion in acute stroke: heterogeneous patterns of flow/metabolism uncoupling as assessed by quantitative positron emission tomography.

DOI: http://doi.org/10.1159/000084087
Journal: Cerebrovasc Dis
E-pub date: 1 Aug 2005
Authors: JV Guadagno, EA Warburton, PS Jones, TD Fryer, DJ Day, JH Gillard, TA Carpenter, FI Aigbirhio, CJ Price, J-C Baron

Does the acute diffusion-weighted imaging lesion represent penumbra as well as core? A combined quantitative PET/MRI voxel-based study.

DOI: http://doi.org/10.1097/01.WCB.0000141557.32867.6B
Journal: J Cereb Blood Flow Metab
E-pub date: 1 Nov 2004
Authors: JV Guadagno, EA Warburton, FI Aigbirhio, P Smielewski, TD Fryer, S Harding, CJ Price, JH Gillard, TA Carpenter, J-C Baron