World's Best Scientists 2026 revealed!

D-Index & Metrics

Biology and Biochemistry

D-Index
74
Citations
19245
World Ranking
5608
National Ranking
2662

Medicine

D-Index
74
Citations
19314
World Ranking
19419
National Ranking
9673

Ian A. Simpson publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Ian A. Simpson sits on this spectrum.

47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 414 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 849 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 950 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 841 scientists 207–216 publications: 735 scientists 217–226 publications: 709 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 418 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 197 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 60 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientists 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientists 1,028+ publications: 100 scientists
47 publications 1,028+

This scientist: 159 publications — 31st percentile

31% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,028 publications or more.

Ian A. Simpson D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Ian A. Simpson sits on this spectrum.

40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 317 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 900 scientists 52–53 D-Index: 1,026 scientists 54–55 D-Index: 1,150 scientists 56–57 D-Index: 1,236 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,163 scientists 62–63 D-Index: 1,131 scientists 64–65 D-Index: 1,032 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 715 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 72 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40 D-Index 167+

This scientist: 74 D-Index — 72nd percentile

72% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

Overview

Ian A. Simpson is affiliated with Pennsylvania State University in the United States. Their research spans the field of Medicine, with a primary focus on subfields such as Archeology, Hematology, Genetics, Molecular Biology, and Nutrition and Dietetics.

The scientist's work addresses several main topics, including:

  • Iron Metabolism and Disorders
  • Hemoglobinopathies and Related Disorders
  • Trace Elements in Health
  • Archaeology and Historical Studies
  • Archaeology and Ancient Environmental Studies
  • Ancient Mediterranean Archaeology and History
  • Restless Legs Syndrome Research

Recent publications by Ian A. Simpson illustrate the diversity of their research interests. These include:

  • "Earliest known human burial in Africa," 2021, Nature
  • "Exosomes are involved in iron transport from human blood-brain barrier endothelial cells and are modified by endothelial cell iron status," 2023, Journal of Biological Chemistry
  • "Brain iron acquisition: An overview of homeostatic regulation and disease dysregulation," 2023, Journal of Neurochemistry
  • "The role of neutrophils in mediating stroke injury in the diabetic db/db mouse brain following hypoxia-ischemia," 2020, Neurochemistry International
  • "Regulation of brain iron uptake by apo- and holo-transferrin is dependent on sex and delivery protein," 2022, Fluids and Barriers of the CNS

Ian A. Simpson frequently publishes in several journals, including:

  • Journal of Neurochemistry
  • Fluids and Barriers of the CNS
  • bioRxiv (Cold Spring Harbor Laboratory)
  • Nature
  • Journal of Biological Chemistry

Their collaborative work often involves recurring coauthors such as:

  • James R. Connor
  • Stephanie L. Baringer
  • Kondaiah Palsa
  • Achim Lichtenberger
  • Rubina Raja

Best Publications

  • Diabetic retinopathy: seeing beyond glucose-induced microvascular disease.

    David A. Antonetti;Alistair J. Barber;Sarah K. Bronson;Willard M. Freeman

  • Supply and demand in cerebral energy metabolism: the role of nutrient transporters

    Ian A Simpson;Anthony Carruthers;Susan J Vannucci

  • Glucose transporter proteins in brain: Delivery of glucose to neurons and glia

    Susan J. Vannucci;Fran Maher;Ian A. Simpson

  • Glucose transporter proteins in brain.

    Frances Maher;Susan J. Vannucci;Ian A. Simpson

  • Glucose Transporter Isoforms GLUT1 and GLUT3 Transport Dehydroascorbic Acid

    Steven C. Rumsey;Oran Kwon;Guo Wei Xu;Charles F. Burant

  • Decreased concentrations of GLUT1 and GLUT3 glucose transporters in the brains of patients with Alzheimer's disease.

    Ian A. Simpson;Koteswara R. Chundu;Theresa Davies-Hill;William G. Honer

  • Insulin-stimulated translocation of glucose transport systems in the isolated rat adipose cell. Time course, reversal, insulin concentration dependency, and relationship to glucose transport activity.

    E Karnieli;M J Zarnowski;P J Hissin;I A Simpson

  • The facilitative glucose transporter GLUT3: 20 years of distinction

    Ian A. Simpson;Donard Dwyer;Daniela Malide;Kelle H. Moley

  • Hormonal Regulation of Mammalian Glucose Transport

    Ian A. Simpson;Samuel W. Cushman

  • Structure of the Blood–Brain Barrier and Its Role in the Transport of Amino Acids

    Richard A. Hawkins;Robyn L. O'Kane;Ian A. Simpson;Juan R. Viña

  • Insulin-stimulated translocation of glucose transporters in the isolated rat adipose cells: characterization of subcellular fractions.

    Ian A. Simpson;Dena R. Yver;Paul J. Hissin;Lawrence J. Wardzala

  • Cell surface labeling of glucose transporter isoform GLUT4 by bis-mannose photolabel. Correlation with stimulation of glucose transport in rat adipose cells by insulin and phorbol ester.

    G D Holman;I J Kozka;A E Clark;C J Flower

  • Use of bismannose photolabel to elucidate insulin-regulated GLUT4 subcellular trafficking kinetics in rat adipose cells. Evidence that exocytosis is a critical site of hormone action

    S. Satoh;H. Nishimura;A.E. Clark;I.J. Kozka

  • Blood-brain barrier glucose transporter: effects of hypo- and hyperglycemia revisited.

    Ian A. Simpson;Nathan M. Appel;Mitsuhiko Hokari;Jun Oki

  • Distribution of divalent metal transporter 1 and metal transport protein 1 in the normal and Belgrade rat.

    J. R. Burdo;S. L. Menzies;Ian Simpson;L. M. Garrick

  • Developmental switch in brain nutrient transporter expression in the rat.

    Susan J. Vannucci;Ian A. Simpson

  • Dehydroascorbic Acid Transport by GLUT4 in XenopusOocytes and Isolated Rat Adipocytes

    Steven C. Rumsey;Rushad Daruwala;Hadi Al-Hasani;Mary Jane Zarnowski

  • Astrocytic demise precedes delayed neuronal death in focal ischemic rat brain.

    Dong Liu;Carolyn L Smith;Frank C Barone;Julie A Ellison

  • Ferritin - A Novel Mechanism for Delivery of Iron to the Brain and other Organs

    Jerron Lee Fisher;Kavi Devraj;Justin Ingram;Becky Slagle-Webb

  • The facilitative glucose transporter GLUT 3 : 20 years of distinction

    Ian A. Simpson;Donard Dwyer;Daniela Malide;Kelle H. Moley

Frequent Co-Authors

Samuel W. Cushman
Samuel W. Cushman National Institutes of Health
James R. Connor
James R. Connor Pennsylvania State University
Constantine Londos
Constantine Londos National Institutes of Health
Kathryn F. LaNoue
Kathryn F. LaNoue Pennsylvania State University
Geoffrey D. Holman
Geoffrey D. Holman University of Bath
Anthony Carruthers
Anthony Carruthers University of Massachusetts Chan Medical School
Peter Davies
Peter Davies University of Queensland
Astrid Nehlig
Astrid Nehlig Inserm : Institut national de la santé et de la recherche médicale
Silvia Mangia
Silvia Mangia University of Minnesota
Makoto Kuroda
Makoto Kuroda National Institutes of Health

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