• 9832 Citations
  • 55 h-Index
1976 …2019
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Research Output 1976 2019

  • 9832 Citations
  • 55 h-Index
  • 128 Article
  • 5 Review article
  • 3 Chapter
  • 1 Letter
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Article
2019
12 Citations (Scopus)

Endothelial cells are critical regulators of iron transport in a model of the human blood–brain barrier

Chiou, B., Neal, E. H., Bowman, A. B., Lippmann, E. S., Simpson, I. & Connor, J., Nov 1 2019, In : Journal of Cerebral Blood Flow and Metabolism. 39, 11, p. 2117-2131 15 p.

Research output: Contribution to journalArticle

Iron
Endothelial Cells
Brain
Apoferritins
Transferrin

Transferrin and H-ferritin involvement in brain iron acquisition during postnatal development: impact of sex and genotype

Chiou, B., Neely, E. B., Mcdevitt, D. S., Simpson, I. & Connor, J., Jan 1 2019, (Accepted/In press) In : Journal of neurochemistry.

Research output: Contribution to journalArticle

Apoferritins
Sexual Development
Transferrin
Brain
Iron
2018
5 Citations (Scopus)

A role for sex and a common HFE gene variant in brain iron uptake

Duck, K. A., Neely, E. B., Simpson, I. & Connor, J., Mar 1 2018, In : Journal of Cerebral Blood Flow and Metabolism. 38, 3, p. 540-548 9 p.

Research output: Contribution to journalArticle

Iron
Brain
Genes
Mutation
Genotype
6 Citations (Scopus)

Pharmaceutical iron formulations do not cross a model of the human blood-brain barrier

Chiou, B., Neal, E. H., Bowman, A. B., Lippmann, E. S., Simpson, I. & Connor, J., Jun 1 2018, In : PloS one. 13, 6, e0198775.

Research output: Contribution to journalArticle

Drug Compounding
blood-brain barrier
Blood-Brain Barrier
Iron
iron
2 Citations (Scopus)

The role of HFE genotype in macrophage phenotype

Nixon, A. M., Neely, E., Simpson, I. & Connor, J., Feb 1 2018, In : Journal of Neuroinflammation. 15, 1, 30.

Research output: Contribution to journalArticle

Iron
Macrophages
Genotype
Phenotype
Homeostasis
2017
12 Citations (Scopus)

Regulatory mechanisms for iron transport across the blood-brain barrier

Duck, K. A., Simpson, I. & Connor, J., Dec 9 2017, In : Biochemical and Biophysical Research Communications. 494, 1-2, p. 70-75 6 p.

Research output: Contribution to journalArticle

Blood-Brain Barrier
Iron
Brain
Endothelial cells
Endothelial Cells
2015
56 Citations (Scopus)

A novel model for brain iron uptake: Introducing the concept of regulation

Simpson, I., Ponnuru, P., Klinger, M. E., Myers, R. L., Devraj, K., Coe, C. L., Lubach, G. R., Carruthers, A. & Connor, J., Jan 10 2015, In : Journal of Cerebral Blood Flow and Metabolism. 35, 1, p. 48-57 10 p.

Research output: Contribution to journalArticle

Iron
Brain
Blood-Brain Barrier
Endothelial Cells
Transferrin
2011
36 Citations (Scopus)

GLUT-1 glucose transporters in the blood-brain barrier: Differential phosphorylation

Devraj, K., Klinger, M. E., Myers, R. L., Mokashi, A., Hawkins, R. A. & Simpson, I., Dec 1 2011, In : Journal of Neuroscience Research. 89, 12, p. 1913-1925 13 p.

Research output: Contribution to journalArticle

Facilitative Glucose Transport Proteins
Blood-Brain Barrier
Phosphorylation
Brain
Glucose
36 Citations (Scopus)

Increased cerebral matrix metalloprotease-9 activity is associated with compromised recovery in the diabetic db/db mouse following a stroke

Kumari, R., Willing, L. B., Patel, S. D., Baskerville, K. A. & Simpson, I., Dec 1 2011, In : Journal of neurochemistry. 119, 5, p. 1029-1040 12 p.

Research output: Contribution to journalArticle

Metalloproteases
Stroke
Recovery
Blood-Brain Barrier
Tissue
21 Citations (Scopus)
Mifepristone
Glucocorticoid Receptors
Biomarkers
DNA Damage
Muscle
9 Citations (Scopus)

Temporal changes in mRNA expression of the brain nutrient transporters in the lithium-pilocarpine model of epilepsy in the immature and adult rat

Leroy, C., Pierre, K., Simpson, I., Pellerin, L., Vannucci, S. J. & Nehlig, A., Sep 1 2011, In : Neurobiology of Disease. 43, 3, p. 588-597 10 p.

Research output: Contribution to journalArticle

Pilocarpine
Lithium
Epilepsy
Status Epilepticus
Food
2010
32 Citations (Scopus)

The PPAR-γ agonist, darglitazone, restores acute inflammatory responses to cerebral hypoxia-ischemia in the diabetic ob/ob mouse

Kumari, R., Willing, L. B., Patel, S. D., Krady, J. K., Zavadoski, W. J., Gibbs, E. M., Vannucci, S. J. & Simpson, I., Feb 1 2010, In : Journal of Cerebral Blood Flow and Metabolism. 30, 2, p. 352-360 9 p.

Research output: Contribution to journalArticle

Brain Hypoxia-Ischemia
Peroxisome Proliferator-Activated Receptors
darglitazone
Glial Fibrillary Acidic Protein
Corticosterone
2009
10 Citations (Scopus)

Improved membrane protein solubilization and clean-up for optimum two-dimensional electrophoresis utilizing GLUT-1 as a classic integral membrane protein

Devraj, K., Geguchadze, R., Klinger, M. E., Freeman, W. M., Mokashi, A., Hawkins, R. A. & Simpson, I., Oct 30 2009, In : Journal of Neuroscience Methods. 184, 1, p. 119-123 5 p.

Research output: Contribution to journalArticle

Electrophoresis
Membrane Proteins
Facilitative Glucose Transport Proteins
Isoelectric Point
Proteins
113 Citations (Scopus)

The in vivo neuron-to-astrocyte lactate shuttle in human brain: Evidence from modeling of measured lactate levels during visual stimulation

Mangia, S., Simpson, I., Vannucci, S. J. & Carruthers, A., May 1 2009, In : Journal of neurochemistry. 109, SUPPL. 1, p. 55-62 8 p.

Research output: Contribution to journalArticle

Photic Stimulation
Astrocytes
Neurons
Magnetic resonance spectroscopy
Lactic Acid
6 Citations (Scopus)

The ketogenic diet has no effect on the expression of spike-and-wave discharges and nutrient transporters in genetic absence epilepsy rats from Strasbourg

Nehlig, A., Dufour, F., Klinger, M., Willing, L. B., Simpson, I. & Vannucci, S. J., May 1 2009, In : Journal of neurochemistry. 109, SUPPL. 1, p. 207-213 7 p.

Research output: Contribution to journalArticle

Ketogenic Diet
Absence Epilepsy
Nutrition
Nutrients
Rats
2007
116 Citations (Scopus)

Ferritin: A novel mechanism for delivery of iron to the brain and other organs

Fisher, J., Devraj, K., Ingram, J., Slagle-Webb, B., Madhankumar, A., Liu, X., Klinger, M., Simpson, I. & Connor, J., Aug 1 2007, In : American Journal of Physiology - Cell Physiology. 293, 2

Research output: Contribution to journalArticle

Apoferritins
Ferritins
Iron
Brain
Endothelial Cells
40 Citations (Scopus)

Impaired wound healing after cerebral hypoxia-ischemia in the diabetic mouse

Kumari, R., Willing, L. B., Krady, J. K., Vannucci, S. J. & Simpson, I., Apr 26 2007, In : Journal of Cerebral Blood Flow and Metabolism. 27, 4, p. 710-718 9 p.

Research output: Contribution to journalArticle

Brain Hypoxia-Ischemia
Wound Healing
Interleukin-1
Glial Fibrillary Acidic Protein
Reperfusion
73 Citations (Scopus)

Mechanism of age-dependent susceptibility and novel treatment strategy in glutaric acidemia type I

Zinnanti, W. J., Lazovic, J., Housman, C., Lanoue, K., O'Callaghan, J. P., Simpson, I., Woontner, M., Goodman, S. I., Connor, J., Jacobs, R. E. & Cheng, K., Nov 1 2007, In : Journal of Clinical Investigation. 117, 11, p. 3258-3270 13 p.

Research output: Contribution to journalArticle

Brain Injuries
Lysine
Brain
Magnetic Resonance Spectroscopy
Corpus Striatum
2006
67 Citations (Scopus)

Analysis of glucose metabolism in diabetic rat retinas

Ola, M. S., Berkich, D. A., Xu, Y., King, M. T., Gardner, T. W., Simpson, I. & LaNoue, K. F., Jun 14 2006, In : American Journal of Physiology - Endocrinology and Metabolism. 290, 6

Research output: Contribution to journalArticle

Hyperglycemia
Retina
Glucose
NAD
Citric Acid Cycle
53 Citations (Scopus)

Cationic amino acid transport across the blood-brain barrier is mediated exclusively by system y+

O'Kane, R. L., Viña, J. R., Simpson, I., Zaragozá, R., Mokashi, A. & Hawkins, R. A., Jul 17 2006, In : American Journal of Physiology - Endocrinology and Metabolism. 291, 2

Research output: Contribution to journalArticle

Blood-Brain Barrier
Basic Amino Acid Transport Systems
Amino Acids
Arginine
Endothelial Cells
18 Citations (Scopus)

Paralemmin interacts with D3 dopamine receptors: Implications for membrane localization and cAMP signaling

Basile, M., Lin, R., Kabbani, N., Karpa, K., Kilimann, M., Simpson, I. & Kester, M., Feb 1 2006, In : Archives of Biochemistry and Biophysics. 446, 1, p. 60-68 9 p.

Research output: Contribution to journalArticle

Dopamine D3 Receptors
Cell membranes
Adenylyl Cyclases
Lipid-Linked Proteins
Dopamine D4 Receptors
10 Citations (Scopus)

Pentylenetetrazol-induced status epilepticus up-regulates the expression of glucose transporter mRNAs but not proteins in the immature rat brain

Nehlig, A., Rudolf, G., Leroy, C., Rigoulot, M. A., Simpson, I. & Vannucci, S. J., Apr 12 2006, In : Brain research. 1082, 1, p. 32-42 11 p.

Research output: Contribution to journalArticle

Pentylenetetrazole
Facilitative Glucose Transport Proteins
Status Epilepticus
Seizures
Up-Regulation
10 Citations (Scopus)

Pyroglutamate stimulates Na+-dependent glutamate transport across the blood-brain barrier

Hawkins, R. A., Simpson, I., Mokashi, A. & Viña, J. R., Aug 7 2006, In : FEBS Letters. 580, 18, p. 4382-4386 5 p.

Research output: Contribution to journalArticle

Pyrrolidonecarboxylic Acid
Blood-Brain Barrier
Glutamic Acid
Membranes
Amino Acid Transport System X-AG
251 Citations (Scopus)

Structure of the blood-brain barrier and its role in the transport of amino acids

Hawkins, R. A., O'Kane, R. L., Simpson, I. & Viña, J. R., Jan 1 2006, In : Journal of Nutrition. 136, 1

Research output: Contribution to journalArticle

Blood-Brain Barrier
Amino Acids
Brain
Membranes
Neutral Amino Acid Transport Systems
2005
28 Citations (Scopus)

An active transport system in the blood-brain barrier may reduce levodopa availability

Hawkins, R. A., Mokashi, A. & Simpson, I., Sep 1 2005, In : Experimental Neurology. 195, 1, p. 267-271 5 p.

Research output: Contribution to journalArticle

Active Biological Transport
Levodopa
Blood-Brain Barrier
Brain
Amino Acid Transport Systems
36 Citations (Scopus)

Monocarboxylate transporter expression in the spontaneous hypertensive rat: Effect of stroke

Zhang, F., Vannucci, S. J., Philp, N. J. & Simpson, I., Jan 15 2005, In : Journal of Neuroscience Research. 79, 1-2, p. 139-145 7 p.

Research output: Contribution to journalArticle

Stroke
Messenger RNA
Astrocytes
Cicatrix
Cell Death
2004
59 Citations (Scopus)

Estrogen stimulates microglia and brain recovery from hypoxia-ischemia in normoglycemic but not diabetic female mice

Zhang, L., Nair, A., Krady, K., Corpe, C., Bonneau, R. H., Simpson, I. & Vannucci, S. J., Jan 1 2004, In : Journal of Clinical Investigation. 113, 1, p. 85-95 11 p.

Research output: Contribution to journalArticle

Brain Hypoxia-Ischemia
Microglia
Estrogens
Brain
Gene Expression
38 Citations (Scopus)
Amino Acid Transport System ASC
Amino Acid Transport System A
Neutral Amino Acid Transport Systems
Neutral Amino Acids
Blood-Brain Barrier
43 Citations (Scopus)

Regulation of the Profile of Iron-Management Proteins in Brain Microvasculature

Burdo, J. R., Simpson, I., Menzies, S., Beard, J. & Connor, J., Jan 1 2004, In : Journal of Cerebral Blood Flow and Metabolism. 24, 1, p. 67-74 8 p.

Research output: Contribution to journalArticle

Microvessels
Iron
Brain
Proteins
Ferritins
2003
81 Citations (Scopus)

Characterization of insulin signaling in rat retina in vivo and ex vivo

Reiter, C. E. N., Sandirasegarane, L., Wolpert, E. B., Klinger, M., Simpson, I., Barber, A., Antonetti, D. A., Kester, M. & Gardner, T. W., Oct 1 2003, In : American Journal of Physiology - Endocrinology and Metabolism. 285, 4 48-4

Research output: Contribution to journalArticle

Insulin Receptor
Retina
Insulin
Phosphotransferases
Phosphorylation
164 Citations (Scopus)

Developmental switch in brain nutrient transporter expression in the rat

Vannucci, S. J. & Simpson, I., Nov 1 2003, In : American Journal of Physiology - Endocrinology and Metabolism. 285, 5 48-5

Research output: Contribution to journalArticle

Food
Brain
Monocarboxylic Acid Transporters
Glucose
Blood-Brain Barrier
2002
46 Citations (Scopus)

Cloning and functional characterization of the mouse fructose transporter, GLUT5

Corpe, C. P., Bovelander, F. J., Munoz, C. M., Hoekstra, J. H., Simpson, I., Kwon, O., Levine, M. & Burant, C. F., Jun 7 2002, In : Biochimica et Biophysica Acta - Gene Structure and Expression. 1576, 1-2, p. 191-197 7 p.

Research output: Contribution to journalArticle

Cloning
Fructose
Organism Cloning
Complementary DNA
5' Flanking Region
7 Citations (Scopus)

Glucose transport into brain: Effects of hypoglycemia

Simpson, I. & Vannucci, S. J., Oct 1 2002, In : Diabetes, Nutrition and Metabolism - Clinical and Experimental. 15, 5, p. 281-284 4 p.

Research output: Contribution to journalArticle

hypoglycemia
Hypoglycemia
brain
Glucose
glucose
2001
226 Citations (Scopus)

Distribution of Divalent Metal Transporter 1 and Metal Transport Protein 1 in the normal and Belgrade rat

Burdo, J. R., Menzies, S. L., Simpson, I., Garrick, L. M., Garrick, M. D., Dolan, K. G., Haile, D. J., Beard, J. L. & Connor, J., Dec 15 2001, In : Journal of Neuroscience Research. 66, 6, p. 1198-1207 10 p.

Research output: Contribution to journalArticle

Carrier Proteins
Iron
Metals
Brain
Staining and Labeling
110 Citations (Scopus)

Experimental stroke in the female diabetic, db/db, mouse

Vannucci, S. J., Willing, L. B., Goto, S., Alkayed, N. J., Brucklacher, R. M., Wood, T. L., Towfighi, J., Hurn, P. D. & Simpson, I., Jan 1 2001, In : Journal of Cerebral Blood Flow and Metabolism. 21, 1, p. 52-60 9 p.

Research output: Contribution to journalArticle

Stroke
Cerebrovascular Circulation
Common Carotid Artery
Brain
Ligation
71 Citations (Scopus)

Glucose Transporter Asymmetries in the Bovine Blood-Brain Barrier

Simpson, I., Vannucci, S. J., DeJoseph, M. R. & Hawkins, R. A., Apr 20 2001, In : Journal of Biological Chemistry. 276, 16, p. 12725-12729 5 p.

Research output: Contribution to journalArticle

Facilitative Glucose Transport Proteins
Blood-Brain Barrier
Membranes
Endothelial cells
Photoaffinity Labels
6 Citations (Scopus)

Synopsis of the workshop entitled "Is lactate a nutrient for neurons" held at the brain energy meeting in Trondheim, Norway

Vannucci, S. J. & Simpson, I., Dec 1 2001, In : Journal of Neuroscience Research. 66, 5, p. 821-823 3 p.

Research output: Contribution to journalArticle

Citric Acid Cycle
Glycolysis
Norway
Glutamic Acid
Lactic Acid
2000
6 Citations (Scopus)

Cerebral glucose utilization and glucose transporter expression: Response to water deprivation and restoration

Koehler-Stec, E. M., Li, K., Maher, F., Vannucci, S. J., Smith, C. B. & Simpson, I., Jan 1 2000, In : Journal of Cerebral Blood Flow and Metabolism. 20, 1, p. 192-200 9 p.

Research output: Contribution to journalArticle

Water Deprivation
Posterior Pituitary Gland
Facilitative Glucose Transport Proteins
Glucose
Messenger RNA
136 Citations (Scopus)

Dehydroascorbic acid transport by GLUT4 xenopus oocytes and isolated rat adipocytes

Rumsey, S. C., Daruwala, R., Al-Hasani, H., Zarnowski, M. J., Simpson, I. & Levine, M., Sep 8 2000, In : Journal of Biological Chemistry. 275, 36, p. 28246-28253 8 p.

Research output: Contribution to journalArticle

Dehydroascorbic Acid
Xenopus
Adipocytes
Oocytes
Rats
22 Citations (Scopus)

Prenatal expression of the GLUT4 glucose transporter in the mouse

Vannucci, S. J., Rutherford, T., Wilkie, M. B., Simpson, I. & Lauder, J. M., Jan 1 2000, In : Developmental Neuroscience. 22, 4, p. 274-282 9 p.

Research output: Contribution to journalArticle

Facilitative Glucose Transport Proteins
Glucose Transporter Type 4
Cerebellum
Cartilage
Brain
1999
29 Citations (Scopus)

Alterations in blood-brain barrier glucose transport in SIV-infected macaques

Mankowski, J. L., Queen, S. E., Kirstein, L. M., Spelman, J. P., Laterra, J., Simpson, I., Adams, R. J., Clements, J. E. & Zink, M. C., Jan 1 1999, In : Journal of NeuroVirology. 5, 6, p. 695-702 8 p.

Research output: Contribution to journalArticle

Facilitative Glucose Transport Proteins
Macaca
Blood-Brain Barrier
Glucose
Encephalitis
150 Citations (Scopus)

Astrocytic demise precedes delayed neuronal death in focal ischemic rat brain

Liu, D., Smith, C. L., Barone, F. C., Ellison, J. A., Lysko, P. G., Li, K. & Simpson, I., May 7 1999, In : Molecular Brain Research. 68, 1-2, p. 29-41 13 p.

Research output: Contribution to journalArticle

Neuroglia
Messenger RNA
Brain
Proteins
Middle Cerebral Artery Infarction
216 Citations (Scopus)

Blood-brain barrier glucose transporter: Effects of hypo- and hyperglycemia revisited

Simpson, I., Appel, N. M., Hokari, M., Oki, J., Holman, G. D., Maher, F., Koehler-Stec, E. M., Vannucci, S. J. & Smith, Q. R., Jan 11 1999, In : Journal of neurochemistry. 72, 1, p. 238-247 10 p.

Research output: Contribution to journalArticle

Facilitative Glucose Transport Proteins
Blood-Brain Barrier
Hypoglycemia
Hyperglycemia
Glucose
29 Citations (Scopus)

Effects of barbiturates on facilitative glucose transporters are pharmacologically specific and isoform selective

Haspel, H. C., Stephenson, K. N., Davies-Hill, T., El-Barbary, A., Lobo, J. F., Croxen, R. L., Mougrabi, W., Koehler-Stec, E. M., Fenstermacher, J. D. & Simpson, I., May 17 1999, In : Journal of Membrane Biology. 169, 1, p. 45-53 9 p.

Research output: Contribution to journalArticle

Barbiturates
Facilitative Glucose Transport Proteins
Protein Isoforms
Glucose
Halogenated Hydrocarbons
1998
92 Citations (Scopus)

Alterations in GLUT1 and GLUT3 glucose transporter gene expression following unilateral hypoxia-ischemia in the immature rat brain

Vannucci, S. J., Reinhart, R., Maher, F., Bondy, C. A., Lee, W. H., Vannucci, R. C. & Simpson, I., May 15 1998, In : Developmental Brain Research. 107, 2, p. 255-264 10 p.

Research output: Contribution to journalArticle

Facilitative Glucose Transport Proteins
Brain Hypoxia-Ischemia
Ischemia
Gene Expression
Ligation
74 Citations (Scopus)

Distinct localization of GLUT-1, -3, and -5 in human monocyte-derived macrophages: Effects of cell activation

Malide, D., Davies-Hill, T. M., Levine, M. & Simpson, I., Mar 1 1998, In : American Journal of Physiology - Endocrinology and Metabolism. 274, 3 37-3

Research output: Contribution to journalArticle

Macrophages
Chemical activation
Tetradecanoylphorbol Acetate
Protein Isoforms
methionyl-leucyl-phenylalanine
110 Citations (Scopus)

Glucose transporter expression in brain: Relationship to cerebral glucose utilization

Vannucci, S. J., Clark, R. R., Koehler-Stec, E., Li, K., Smith, C. B., Davies, P., Maher, F. & Simpson, I., Oct 1 1998, In : Developmental Neuroscience. 20, 4-5, p. 369-379 11 p.

Research output: Contribution to journalArticle

Facilitative Glucose Transport Proteins
Glucose
Brain
Blood-Brain Barrier
Neuroglia
114 Citations (Scopus)

GLUT4 glucose transporter expression in rodent brain: Effect of diabetes

Vannucci, S. J., Koehler-Stec, E. M., Li, K., Reynolds, T. H., Clark, R. & Simpson, I., Jun 22 1998, In : Brain research. 797, 1, p. 1-11 11 p.

Research output: Contribution to journalArticle

Facilitative Glucose Transport Proteins
Cerebellum
Rodentia
Glucose Transporter Type 4
Insulin
126 Citations (Scopus)

Monocarboxylate transporter expression in mouse brain

Koehler-Stec, E. M., Simpson, I., Vannucci, S. J., Landschulz, K. T. & Landschulz, W. H., Sep 1 1998, In : American Journal of Physiology - Endocrinology and Metabolism. 275, 3 38-3

Research output: Contribution to journalArticle

Messenger RNA
Brain
Ependyma
Kidney
Ketone Bodies
1997
69 Citations (Scopus)

Glucose transporter Glut 5 expression in microglial cells

Payne, J., Maher, F., Simpson, I., Mattice, L. & Davies, P., Nov 1 1997, In : GLIA. 21, 3, p. 327-331 5 p.

Research output: Contribution to journalArticle

Facilitative Glucose Transport Proteins
Formaldehyde
Brain
Fructose
Immunoblotting