Christopher A. O’Callaghan

13.1k citations

117 papers · 9.4k · 2 hit papers · h-index 39

Impact in

Nephrology top 0.2%
- Chronic Kidney Disease and Diabetes
- Dialysis and Renal Disease Management
Immunology top 0.5%
- Immune Cell Function and Interaction
- T-cell and B-cell Immunology
- Immunotherapy and Immune Responses
- Reproductive System and Pregnancy

Papers in

Immunology 48
- Immune Cell Function and Interaction 35
- T-cell and B-cell Immunology 22
- Immunotherapy and Immune Responses 8
Nephrology 21
- Chronic Kidney Disease and Diabetes 11
- Renal Diseases and Glomerulopathies 9
- Dialysis and Renal Disease Management 5

Co-authors: Daniel Lasserson (15 shared papers)Richard Hobbs (9 shared papers)Jennifer Hirst (5 shared papers)Nathan R. Hill (3 shared papers)Jason Oke (2 shared papers)Samuel Fatoba (2 shared papers)Andrew J. McMichael (12 shared papers)Rachel Allen (5 shared papers)
Journals: PLoS ONE (5 papers)BMJ Open (5 papers)Protein Science (5 papers)Journal of Biological Chemistry (5 papers)The Journal of Experimental Medicine (5 papers)
Partner nations: United Kingdom United States Germany

In The Last Decade

Christopher A. O’Callaghan

111 papers receiving 9.2k citations

Christopher A. O’Callaghan's Hit Papers

align trajectories log scale

Global Prevalence of Chronic Kidney Disease – A Systematic Review and Meta-Analysis 2016 · 2.7k citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2016 PLoS ONE
1998 The Journal of Experimental Medicine

Peers

Countries citing papers authored by Christopher A. O’Callaghan

Since Specialization

Citations

This map shows the geographic impact of Christopher A. O’Callaghan's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Christopher A. O’Callaghan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Christopher A. O’Callaghan more than expected).

Fields of papers citing papers by Christopher A. O’Callaghan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Christopher A. O’Callaghan. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Christopher A. O’Callaghan. The network helps show where Christopher A. O’Callaghan may publish in the future.

Co-authors

The 25 scholars most cited alongside Christopher A. O’Callaghan, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Christopher A. O’Callaghan Line = papers co-authored together Christopher A. O’Callaghan links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 117 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Global Prevalence of Chronic Kidney Disease – A Systematic Review and Meta-Analysis PLoS ONE ·Nathan R. Hill, Samuel Fatoba, Jason Oke, Jennifer Hirst, Christopher A. O’Callaghan, Daniel Lasserson, Richard Hobbs Hit paper breakdown →	2016	2697
2	Direct Visualization of Antigen-specific CD8+T Cells during the Primary Immune Response to Epstein-Barr Virus In Vivo The Journal of Experimental Medicine ·Margaret Callan, Linda Tan, N. E. Annels, Graham S. Ogg, Jamie Wilson, Christopher A. O’Callaghan, Neil Steven, Andrew J. McMichael, A. B. Rickinson Hit paper breakdown →	1998	738
3	Human myelomonocytic cells express an inhibitory receptor for classical and nonclassical MHC class I molecules. PubMed ·Marco Colonna, Jacqueline Samaridis, Marina Cella, Lena Ångman, Rachel Allen, Christopher A. O’Callaghan, P. Rod Dunbar, Graham S. Ogg, Vincenzo Cerundolo, A Rolink	1998	452
4	A Re-Evaluation of the Frequency of CD8+ T Cells Specific for EBV in Healthy Virus Carriers The Journal of Immunology ·Linda Tan, Nancy Gudgeon, Nicola Annels, Pokrath Hansasuta, Christopher A. O’Callaghan, Sarah Rowland‐Jones, Andrew J. McMichael, Alan B. Rickinson, Margaret Callan	1999	434
5	Cutting Edge: Human Myelomonocytic Cells Express an Inhibitory Receptor for Classical and Nonclassical MHC Class I Molecules The Journal of Immunology ·Marco Colonna, Jacqueline Samaridis, Marina Cella, Lena Ångman, Rachel Allen, Christopher A. O’Callaghan, (unknown), Graham S. Ogg, Vincenzo Cerundolo, Antonius Rolink	1998	415
6	Functional Heterogeneity and High Frequencies of Cytomegalovirus-Specific CD8⁺T Lymphocytes in Healthy Seropositive Donors Journal of Virology ·Geraldine M. Gillespie, Mark R. Wills, Victor Appay, Christopher A. O’Callaghan, (unknown), Neil Smith, Patrick Sissons, Sarah Rowland‐Jones, John I. Bell, Paul Moss	2000	350
7	Early highly active antiretroviral therapy for acute HIV-1 infection preserves immune function of CD8 ⁺ and CD4 ⁺ T lymphocytes Proceedings of the National Academy of Sciences ·Annette Oxenius, David A. Price, Philippa Easterbrook, Christopher A. O’Callaghan, Anthony D. Kelleher, Joseph A. Whelan, Glenn Sontag, Andrew K. Sewell, Rodney E. Phillips	2000	330
8	Cutting edge: HLA-B27 can form a novel beta 2-microglobulin-free heavy chain homodimer structure. PubMed ·Rachel Allen, Christopher A. O’Callaghan, AJ McMichael, Paul Bowness	1999	239
9	Cutting Edge: HLA-B27 Can Form a Novel β2-Microglobulin-Free Heavy Chain Homodimer Structure The Journal of Immunology ·Rachel Allen, Christopher A. O’Callaghan, Andrew J. McMichael, Paul Bowness	1999	230
10	A New Look at T Cells The Journal of Experimental Medicine ·Andrew J. McMichael, Christopher A. O’Callaghan	1998	224
11	Recognition and Blocking of Innate Immunity Cells by Candida albicans Chitin Infection and Immunity ·Héctor M. Mora‐Montes, Mihai G. Netea, Gerben Ferwerda, Megan D. Lenardon, Gordon D. Brown, Anita R. Mistry, Bart Jan Kullberg, Christopher A. O’Callaghan, Chirag C. Sheth, Frank C. Odds, Alistair J. P. Brown, Carol A. Munro, Neil A. R. Gow	2011	165
12	Structure of the fungal β‐glucan‐binding immune receptor dectin‐1: Implications for function Protein Science ·James Brown, Christopher A. O’Callaghan, Andrew S. J. Marshall, Robert J.C. Gilbert, Christian Siebold, Siamon Gordon, Gordon D. Brown, E. Yvonne Jones	2007	139
13	Oligoclonal Expansions of CD8+ T Cells in Chronic HIV Infection Are Antigen Specific The Journal of Experimental Medicine ·Jamie Wilson, Graham S. Ogg, Rachel Allen, Philip Goulder, Anthony D. Kelleher, (unknown), Christopher A. O’Callaghan, Sarah Rowland‐Jones, Margaret Callan, Andrew J. McMichael	1998	135
14	Antagonist HIV-1 Gag Peptides Induce Structural Changes in HLA B8 The Journal of Experimental Medicine ·Scott W. Reid, Steve McAdam, Kathrine J. Smith, Paul Klenerman, Christopher A. O’Callaghan, Karl Harlos, Bent K. Jakobsen, Andrew J. McMichael, John I. Bell, David I. Stuart, E. Yvonne Jones	1996	120
15	Regulation of ligands for the activating receptor NKG2D Immunology ·Anita R. Mistry, Christopher A. O’Callaghan	2007	118
16	Extracellular succinate hyperpolarizes M2 macrophages through SUCNR1/GPR91-mediated Gq signaling Cell Reports ·Mette Trauelsen, Thomas K. Hiron, Da Lin, Jacob E. Petersen, Billy Breton, Anna Sofie Husted, Siv A. Hjorth, Asuka Inoue, Thomas M. Frimurer, Michel Bouvier, Christopher A. O’Callaghan, Thue W. Schwartz	2021	116
17	CLEC-2 activates Syk through dimerization Blood ·Craig E. Hughes, Alice Y. Pollitt, Jun Mori, Johannes A. Eble, Michael G. Tomlinson, John H. Hartwig, Christopher A. O’Callaghan, Klaus Fütterer, Steve P. Watson	2010	115
18	Functionally Inert HIV-Specific Cytotoxic T Lymphocytes Do Not Play a Major Role in Chronically Infected Adults and Children The Journal of Experimental Medicine ·Philip Goulder, Yanhua Tang, Christian Brander, Michael R. Betts, Marcus Altfeld, Ken Annamalai, Alicja Trocha, Suqin He, Eric Rosenberg, Graham S. Ogg, Christopher A. O’Callaghan, Spyros A. Kalams, Ross E. McKinney, Kenneth H. Mayer, Richard A. Koup, Stephen I. Pelton, Sandra Burchett, Kenneth McIntosh, Bruce D. Walker	2000	111
19	Structural insights into hedgehog ligand sequestration by the human hedgehog-interacting protein HHIP Nature Structural & Molecular Biology ·B. Bishop, A.R. Aricescu, Karl Harlos, Christopher A. O’Callaghan, E. Yvonne Jones, Christian Siebold	2009	110
20	Activation of the Immune-Metabolic Receptor GPR84 Enhances Inflammation and Phagocytosis in Macrophages Frontiers in Immunology ·Carlota Recio, Daniel Lucy, Gareth S. D. Purvis, Poppy Iveson, Lynda Zeboudj, Asif Iqbal, Daniel W. Lin, Christopher A. O’Callaghan, Lucy J. Davison, Esther Griesbach, Angela J. Russell, Graham M. Wynne, Lea Dib, Claudia Monaco, David R. Greaves	2018	110

About Christopher A. O’Callaghan

Christopher A. O’Callaghan is a scholar working on Immunology, Nephrology, Molecular Biology, Epidemiology and Hematology, having authored 117 papers that have together received 9.4k indexed citations. Recurring topics across this work include Immune Cell Function and Interaction (35 papers), T-cell and B-cell Immunology (22 papers), HIV Research and Treatment (11 papers), Chronic Kidney Disease and Diabetes (11 papers), Renal Diseases and Glomerulopathies (9 papers), Platelet Disorders and Treatments (8 papers), Immunotherapy and Immune Responses (8 papers) and Dialysis and Renal Disease Management (5 papers). The work is most often cited by research in Nephrology (1.4k citations), Immunology (3.8k citations), Virology (813 citations), Hematology (590 citations) and Epidemiology (1.3k citations). Christopher A. O’Callaghan has collaborated with scholars based in United Kingdom, United States and Germany. Frequent co-authors include Daniel Lasserson, Richard Hobbs, Jennifer Hirst, Nathan R. Hill, Jason Oke, Samuel Fatoba, Andrew J. McMichael, Rachel Allen, Graham S. Ogg and Margaret Callan. Their work appears in journals such as PLoS ONE, BMJ Open, Protein Science, Journal of Biological Chemistry and The Journal of Experimental Medicine.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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Christopher A. O’Callaghan

Christopher A. O’Callaghan's Hit Papers

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Fields of papers citing papers by Christopher A. O’Callaghan

All Works

About Christopher A. O’Callaghan

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