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Christopher A. O’Callaghan

Christopher A. O’Callaghan

University of Oxford
United Kingdom

D-Index & Metrics

Biology and Biochemistry

D-Index
47
Citations
18379
World Ranking
18538
National Ranking
1451

Christopher A. O’Callaghan 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 Christopher A. O’Callaghan 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: 162 publications — 32nd percentile

32% of scientists in this discipline score the same or lower.

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

Christopher A. O’Callaghan 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 Christopher A. O’Callaghan 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: 47 D-Index — 6th percentile

6% of scientists in this discipline score the same or lower.

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

Overview

Christopher A. O'Callaghan is affiliated with the University of Oxford in the United Kingdom. Their research primarily focuses on the field of Medicine, with significant contributions across several subfields including Molecular Biology, Immunology, Nephrology, Epidemiology, and Economics and Econometrics.

The scientist's recent publications illustrate a range of interests within medical research. Key papers include:

  • Extracellular succinate hyperpolarizes M2 macrophages through SUCNR1/GPR91-mediated Gq signaling (2021, Cell Reports)
  • Impact of the COVID-19 pandemic on emergency department attendances and acute medical admissions (2021, BMC Emergency Medicine)
  • Prevalence of chronic kidney disease in the community using data from OxRen: a UK population-based cohort study (2020, British Journal of General Practice)
  • Prevalence and factors associated with multimorbidity among primary care patients with decreased renal function (2021, PLoS ONE)
  • Process of care and activity in a clinically inclusive ambulatory emergency care unit: progressive effect over time on clinical outcomes and acute medical admissions (2020, Future Healthcare Journal)

Frequent co-authors collaborating with O'Callaghan include:

  • Michael E. Reschen
  • Richard Hobbs
  • Thomas K. Hiron
  • Daniel Lasserson
  • Jiahao Jiang

O'Callaghan's work often appears in notable publication venues such as:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • British Journal of General Practice
  • PLoS ONE
  • Future Healthcare Journal
  • Applied Microbiology and Biotechnology

The main topics addressed within their research include:

  • Chronic Disease Management Strategies
  • Dialysis and Renal Disease Management
  • Immune cells in cancer
  • Chronic Kidney Disease and Diabetes
  • Health Systems, Economic Evaluations, Quality of Life
  • Atherosclerosis and Cardiovascular Diseases
  • Immune Cell Function and Interaction

Best Publications

  • Global Prevalence of Chronic Kidney Disease - A Systematic Review and Meta-Analysis.

    Nathan R. Hill;Samuel T. Fatoba;Jason L. Oke;Jennifer A. Hirst

  • HLA-E binds to natural killer cell receptors CD94/NKG2A, B and C

    Veronique M. Braud;David S. J. Allan;Christopher A. O'Callaghan;Kalle Söderström

  • Direct Visualization of Antigen-specific CD8+T Cells during the Primary Immune Response to Epstein-Barr Virus In Vivo

    M.F.C. Callan;L. Tan;N. Annels;G.S. Ogg

  • Human myelomonocytic cells express an inhibitory receptor for classical and nonclassical MHC class I molecules.

    Marco Colonna;Jacqueline Samaridis;Marina Cella;Lena Angman

  • A Re-Evaluation of the Frequency of CD8+ T Cells Specific for EBV in Healthy Virus Carriers

    Linda C. Tan;Nancy Gudgeon;Nicola E. Annels;Pokrath Hansasuta

  • Functional Heterogeneity and High Frequencies of Cytomegalovirus-Specific CD8+ T Lymphocytes in Healthy Seropositive Donors

    Geraldine M. A. Gillespie;Mark R. Wills;Victor Appay;Chris O'Callaghan

  • Production of soluble alphabeta T-cell receptor heterodimers suitable for biophysical analysis of ligand binding.

    B E Willcox;G F Gao;Wyer;C A O'Callaghan

  • Early highly active antiretroviral therapy for acute HIV-1 infection preserves immune function of CD8+ and CD4+ T lymphocytes

    Annette Oxenius;David A. Price;Philippa J. Easterbrook;Christopher A. O'Callaghan

  • Genetic fine mapping and genomic annotation defines causal mechanisms at type 2 diabetes susceptibility loci

    Kyle J Gaulton;Kyle J Gaulton;Teresa Ferreira;Yeji Lee;Anne Raimondo

  • A New Look at T Cells

    Andrew J. McMichael;Christopher A. O'Callaghan

  • Cutting edge: HLA-B27 can form a novel beta 2-microglobulin-free heavy chain homodimer structure.

    Rachel L. Allen;Chris A. O’Callaghan;Andrew J. McMichael;Paul Bowness

  • Functional characterization of HLA-F and binding of HLA-F tetramers to ILT2 and ILT4 receptors.

    E J Lepin;J M Bastin;D S Allan;G Roncador

  • Structure and function of the human MHC class Ib molecules HLA-E, HLA-F and HLA-G

    Christopher A. O'Callaghan;John I. Bell

  • Structural features impose tight peptide binding specificity in the nonclassical MHC molecule HLA-E

    C A O'Callaghan;J Tormo;B E Willcox;B E Willcox;V M Braud

  • Recognition and Blocking of Innate Immunity Cells by Candida albicans Chitin

    Héctor M. Mora-Montes;Mihai G. Netea;Gerben Ferwerda;Megan D. Lenardon

  • A genetics-led approach defines the drug target landscape of 30 immune-related traits

    H Fang;H De Wolf;B Knezevic;K L Burnham

  • Regulation of ligands for the activating receptor NKG2D

    Anita R. Mistry;Chris A. O'Callaghan

  • Oligoclonal Expansions of CD8+ T Cells in Chronic HIV Infection Are Antigen Specific

    Jamie D.K. Wilson;Graham S. Ogg;Rachel L. Allen;Philip J.R. Goulder

  • Structure of the Fungal Beta-Glucan-Binding Immune Receptor Dectin-1: Implications for Function.

    J. Brown;C.A. O'Callaghan;A.S.J. Marshall;R.J.C. Gilbert

  • Functionally Inert HIV-Specific Cytotoxic T Lymphocytes Do Not Play a Major Role in Chronically Infected Adults and Children

    Philip J.R. Goulder;Philip J.R. Goulder;Yanhua Tang;Christian Brander;Michael R. Betts

Frequent Co-Authors

Andrew J. McMichael
Andrew J. McMichael University of Oxford
John I. Bell
John I. Bell Ellison Institute of Technology
E Y Jones
E Y Jones University of Oxford
Graham S. Ogg
Graham S. Ogg University of Oxford
Bent K. Jakobsen
Bent K. Jakobsen Continuum Life Sciences
Karl Harlos
Karl Harlos University of Oxford
David I. Stuart
David I. Stuart University of Oxford
Philip J. R. Goulder
Philip J. R. Goulder University of Oxford
Steve P. Watson
Steve P. Watson University of Birmingham
Richard J. Cornall
Richard J. Cornall University of Oxford

External Links

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Best Scientists Citing Christopher A. O’Callaghan

Bruce D. Walker

Bruce D. Walker

Harvard University

Publications: 110

Lorenzo Moretta

Lorenzo Moretta

Bambino Gesù Children's Hospital

Publications: 105

Andrew J. McMichael

Andrew J. McMichael

University of Oxford

Publications: 105

David Price

David Price

University of Aberdeen

Publications: 72

Edgardo D. Carosella

Edgardo D. Carosella

Université Paris Cité

Publications: 67

Alessandro Moretta

Alessandro Moretta

University of Genoa

Publications: 67

Philip J. R. Goulder

Philip J. R. Goulder

University of Oxford

Publications: 67

Jamie Rossjohn

Jamie Rossjohn

Monash University

Publications: 63

Steve P. Watson

Steve P. Watson

University of Birmingham

Publications: 57

Paul Klenerman

Paul Klenerman

University of Oxford

Publications: 53

Lewis L. Lanier

Lewis L. Lanier

University of California, San Francisco

Publications: 53

Nathalie Rouas-Freiss

Nathalie Rouas-Freiss

French Alternative Energies and Atomic Energy Commission (CEA)

Publications: 51

Paul Moss

Paul Moss

University of Birmingham

Publications: 47

Alan B. Rickinson

Alan B. Rickinson

University of Birmingham

Publications: 47

Paul Bowness

Paul Bowness

University of Oxford

Publications: 47

Marcus Altfeld

Marcus Altfeld

University Medical Center Hamburg-Eppendorf

Publications: 46

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