John Ryan

3.4k citations

77 papers · 1.6k indexed · h-index 23

Impact in

Hepatology top 2%
- Hepatitis C virus research
- Liver Disease and Transplantation
Hematology top 5%
- Iron Metabolism and Disorders

Papers in ⓘ

Hepatology 15
- Hepatitis C virus research 8
- Liver Disease and Transplantation 7
Hematology 15
- Iron Metabolism and Disorders 12

Co-authors: John R. Goellner (1 shared paper)J. Aidan Carney (1 shared paper)Michael Pavlides (4 shared papers)Emmanuel Tsochatzis (4 shared papers)Pathik Parikh (1 shared paper)Ahmad Moolla (2 shared papers)John Crowe (4 shared papers)Paul C. Adams (2 shared papers)
Journals: Clinical Gastroenterology and Hepatology (4 papers)Journal of Hepatology (4 papers)Liver International (3 papers)Hepatology (3 papers)The Journal of Immunology (2 papers)
Partner nations: Ireland United States United Kingdom

In The Last Decade

John Ryan

72 papers receiving 1.5k citations

Peers

Countries citing papers authored by John Ryan

Since Specialization

Citations

This map shows the geographic impact of John Ryan'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 John Ryan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John Ryan more than expected).

Fields of papers citing papers by John Ryan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John Ryan. 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 John Ryan. The network helps show where John Ryan may publish in the future.

Co-authors

The 25 scholars most cited alongside John Ryan, 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 John Ryan Line = papers co-authored together John Ryan 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 77 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Hyalinizing Trabecular Adenoma of the Thyroid Gland The American Journal of Surgical Pathology ·J. Aidan Carney, John Ryan, John R. Goellner	1987	156
2	Expenditure freeze: the metabolic response of small mammals to cold environments Ecology Letters ·Murray M. Humphries, Stan Boutin, Donald W. Thomas, John Ryan, Colin Selman, Andrew G. McAdam, Dominique Berteaux, John R. Speakman	2005	89
3	Non-invasive Markers of Liver Fibrosis: Adjuncts or Alternatives to Liver Biopsy? Frontiers in Pharmacology ·Jun Liong Chin, Michael Pavlides, Ahmad Moolla, John Ryan	2016	77
4	EASL Clinical Practice Guidelines on haemochromatosis Journal of Hepatology ·Heinz Zoller, Benedikt Schaefer, Annick Vanclooster, Bill Griffiths, Edouard Bardou‐Jacquet, Elena Corradini, Graça Porto, John Ryan, Markus Cornberg	2022	76
5	Fibrosis assessment in patients with chronic hepatitis B virus (HBV) infection Annals of Translational Medicine ·Pathik Parikh, John Ryan, Emmanuel Tsochatzis	2017	75
6	PYY plays a key role in the resolution of diabetes following bariatric surgery in humans EBioMedicine ·Claudia Guida, Sam D. Stephen, Michael Watson, Niall Dempster, Pierre Larraufie, Thomas Marjot, Tamsin Cargill, Lisa Rickers, Michael Pavlides, Jeremy Tomlinson, Jeremy Cobbold, Chun‐Mei Zhao, Duan Chen, Fiona M. Gribble, Frank Reimann, Richard Gillies, Bruno Sgromo, Patrik Rorsman, John Ryan, Reshma Ramracheya	2019	74
7	Hepatic iron is the major determinant of serum ferritin in NAFLD patients Liver International ·John Ryan, Andrew E. Armitage, Jeremy Cobbold, Rajarshi Banerjee, Oscar Borsani, Paola Dongiovanni, Stefan Neubauer, R Morovat, Lai Mun Wang, Sant‐Rayn Pasricha, Silvia Fargion, Jane Collier, Eleanor Barnes, Hal Drakesmith, Luca Valenti, Michael Pavlides	2017	73
8	Suppression of a deletion mutation in the gene encoding essential PBP2b reveals a new lytic transglycosylase involved in peripheral peptidoglycan synthesis in Streptococcus pneumoniae D39 Molecular Microbiology ·Ho‐Ching Tiffany Tsui, Jia-Qi Zheng, Ariel N. Magallon, John Ryan, Rachel Yunck, Britta E. Rued, Thomas G. Bernhardt, Malcolm E. Winkler	2016	72
9	Multiplexed LC-MS/MS method for the simultaneous quantitation of three novel hepatitis C antivirals, daclatasvir, asunaprevir, and beclabuvir in human plasma Journal of Pharmaceutical and Biomedical Analysis ·Hao Jiang, Hamza Kandoussi, Jianing Zeng, Jian Wang, Roger Demers, Timothy Eley, Bing He, Richard C. Burrell, John A. Easter, Pathanjali Kadiyala, Janice Pursley, Laura Cojocaru, Chanda Baker, John Ryan, Anne‐Françoise Aubry, Mark E. Arnold	2015	60
10	AKR1D1 is a novel regulator of metabolic phenotype in human hepatocytes and is dysregulated in non-alcoholic fatty liver disease Metabolism ·Nikolaos Nikolaou, Laura Gathercole, Lea Marchand, Sara Althari, Niall Dempster, Charlotte Green, Martijn van de Bunt, Catriona McNeil, Anastasia Arvaniti, Beverly Hughes, Bruno Sgromo, Richard Gillies, Hanns–Ulrich Marschall, T.M. Penning, John Ryan, Wiebke Arlt, Leanne Hodson, Jeremy Tomlinson	2019	58
11	A multidisciplinary approach to the management of NAFLD is associated with improvement in markers of liver and cardio-metabolic health Frontline Gastroenterology ·Ahmad Moolla, Kenzo Motohashi, Thomas Marjot, Amelia Shard, Mark Ainsworth, Alastair Gray, Rury R. Holman, Michael Pavlides, John Ryan, Jeremy Tomlinson, Jeremy Cobbold	2019	51
12	Defective Bone Morphogenic Protein Signaling Underlies Hepcidin Deficiency in HFE Hereditary Hemochromatosis Hepatology ·John Ryan, Eleanor Ryan, Aurélie Fabre, Matthew W. Lawless, John Crowe	2010	50
13	Predicting complicated Crohn's disease and surgery: phenotypes, genetics, serology and psychological characteristics of a population-based cohort Alimentary Pharmacology & Therapeutics ·John Ryan, Mark S. Silverberg, Wei Xu, Lesley A. Graff, Laura E. Targownik, John R. Walker, Rachel Carr, Ian Clara, Neil Miller, Linda Rogala, C N Bernstein	2013	48
14	Haemochromatosis The Lancet ·Paul C. Adams, Gary P. Jeffrey, John Ryan	2023	44
15	Pegylated interferon-α induced hypoferremia is associated with the immediate response to treatment in hepatitis C Hepatology ·John Ryan, Sandro Altamura, Emma Devitt, Sarah Mullins, Matthew W. Lawless, Martina U. Muckenthaler, John Crowe	2012	41
16	Younger Age at Diagnosis Is Associated With Panenteric, but Not More Aggressive, Crohn's Disease Clinical Gastroenterology and Hepatology ·Eran Israeli, John Ryan, Leigh–Anne Shafer, Çharles N. Bernstein	2013	41
17	Differences in the cellular response and signaling pathways of cisplatin and BBR3464 ([{trans-PtCl(NH3)2}2μ-(trans-Pt(NH3)2(H2N(CH2)6-NH2)2)]4+) influenced by copper homeostasis Biochemical Pharmacology ·Peyman Kabolizadeh, John Ryan, Nicholas P. Farrell	2006	33
18	A sensitive and accurate liquid chromatography–tandem mass spectrometry method for quantitative determination of the novel hepatitis C NS5A inhibitor BMS-790052 (daclastasvir) in human plasma and urine Journal of Chromatography A ·Hao Jiang, Jianing Zeng, Hamza Kandoussi, Yifei Liu, Xiaodong Wang, Marc Bifano, Laura Cojocaru, John Ryan, Mark E. Arnold	2012	33
19	Blood alanine aminotransferase levels >1,000 IU/l – causes and outcomes Clinical Medicine ·Zita Galvin, Anna McDonough, John Ryan, Stephen Stewart	2015	30
20	Systematic Review of the Clinical Outcomes of Iron Reduction in Hereditary Hemochromatosis Hepatology ·Anil Prabhu, Tamsin Cargill, Nia Roberts, John Ryan	2020	28

About John Ryan

John Ryan is a scholar working on Hepatology, Hematology, Genetics, Epidemiology and Health Informatics, having authored 77 papers that have together received 1.6k indexed citations. Recurring topics across this work include Liver Disease Diagnosis and Treatment (20 papers), Iron Metabolism and Disorders (12 papers), Hemoglobinopathies and Related Disorders (8 papers), Trace Elements in Health (8 papers), Hepatitis C virus research (8 papers), Liver Disease and Transplantation (7 papers), Hepatitis B Virus Studies (4 papers) and HIV/AIDS drug development and treatment (4 papers). The work is most often cited by research in Hepatology (349 citations), Hematology (233 citations), Epidemiology (592 citations), Endocrinology, Diabetes and Metabolism (268 citations) and Genetics (166 citations). John Ryan has collaborated with scholars based in Ireland, United States and United Kingdom. Frequent co-authors include John R. Goellner, J. Aidan Carney, Michael Pavlides, Emmanuel Tsochatzis, Pathik Parikh, Ahmad Moolla, John Crowe, Paul C. Adams, Matthew W. Lawless and Jeremy Cobbold. Their work appears in journals such as Clinical Gastroenterology and Hepatology, Journal of Hepatology, Liver International, Hepatology and The Journal of Immunology.

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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