John Ryan

14.5k total citations · 3 hit papers
208 papers, 9.6k citations indexed

About

John Ryan is a scholar working on Immunology, Cardiology and Cardiovascular Medicine and Pulmonary and Respiratory Medicine. According to data from OpenAlex, John Ryan has authored 208 papers receiving a total of 9.6k indexed citations (citations by other indexed papers that have themselves been cited), including 69 papers in Immunology, 66 papers in Cardiology and Cardiovascular Medicine and 53 papers in Pulmonary and Respiratory Medicine. Recurrent topics in John Ryan's work include Mast cells and histamine (52 papers), Pulmonary Hypertension Research and Treatments (47 papers) and Cardiovascular Function and Risk Factors (34 papers). John Ryan is often cited by papers focused on Mast cells and histamine (52 papers), Pulmonary Hypertension Research and Treatments (47 papers) and Cardiovascular Function and Risk Factors (34 papers). John Ryan collaborates with scholars based in United States, Canada and United Kingdom. John Ryan's co-authors include Stephen L. Archer, William E. Paul, Keats Nelms, Achsah Keegan, José Luís Zamorano, Thenappan Thenappan, Mark L. Ormiston, Carole A. Oskeritzian, Lin Piao and Nick Pullen and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Journal of Biological Chemistry and Circulation.

In The Last Decade

John Ryan

203 papers receiving 9.4k citations

Hit Papers

align trajectories sort by overperformance

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

THE IL-4 RECEPTOR: Signaling Mechanisms and Biologic Functions

1999 1.3k citations John Ryan et al. profile →
Pulmonary arterial hypertension: pathogenesis and clinical management

2018 676 citations Thenappan Thenappan, John Ryan et al. profile →
The Right Ventricle in Pulmonary Arterial Hypertension

2014 339 citations John Ryan, Stephen L. Archer Circulation Research profile →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
John Ryan	3.0k	2.5k	2.4k	2.2k	1.2k	208	9.6k
Seamas C. Donnelly	2.5k 0.8×	4.0k 1.6×	2.2k 0.9×	705 0.3×	708 0.6×	170	10.9k
Carol M. Black	6.2k 2.1×	1.5k 0.6×	3.7k 1.5×	1.8k 0.8×	1.2k 1.0×	161	13.9k
Sylvia Heeneman	1.1k 0.4×	1.3k 0.5×	1.6k 0.7×	1.7k 0.8×	418 0.3×	155	6.8k
Ulf Müller‐Ladner	2.1k 0.7×	4.2k 1.7×	3.8k 1.6×	795 0.4×	1.0k 0.8×	495	16.9k
Zoltán Szekanecz	839 0.3×	3.4k 1.4×	2.3k 1.0×	911 0.4×	587 0.5×	326	12.1k
Paul Declerck	1.8k 0.6×	1.6k 0.6×	2.7k 1.1×	933 0.4×	552 0.4×	321	10.3k
Ravi Bhatia	2.1k 0.7×	1.7k 0.7×	4.8k 2.0×	1.6k 0.7×	909 0.7×	463	21.8k
Barry S. Coller	2.1k 0.7×	1.1k 0.4×	1.9k 0.8×	4.9k 2.2×	631 0.5×	237	14.4k
Beat A. Michel	8.7k 2.9×	3.3k 1.3×	4.3k 1.8×	869 0.4×	2.8k 2.3×	205	20.9k
Giuseppe Novelli	1.5k 0.5×	2.1k 0.8×	8.1k 3.4×	797 0.4×	1.0k 0.8×	636	15.5k

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-authorship network of co-authors of John Ryan

This figure shows the co-authorship network connecting the top 25 collaborators of John Ryan. A scholar is included among the top collaborators of John Ryan based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with John Ryan. John Ryan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Leary, Peter J., Sumeet Panjabi, John M. Hartney, et al.. (2025). Location of Care Delivery for Pulmonary Arterial Hypertension in the United States. American Journal of Respiratory and Critical Care Medicine. 211(4). 619–627. 1 indexed citations

Ratchford, Stephen M., Jesse C. Craig, Van Reese, et al.. (2024). Statin administration improves vascular function in heart failure with preserved ejection fraction. Journal of Applied Physiology. 136(4). 877–888. 3 indexed citations

Bunsawat, Kanokwan, et al.. (2024). Impaired cardiopulmonary baroreflex function and altered cardiovascular responses to hypovolemia in patients with heart failure with preserved ejection fraction. Journal of Applied Physiology. 136(3). 525–534. 3 indexed citations

Garcia, Chelsea, Christopher N. Blesso, Evan R. Jellison, et al.. (2024). IL-10 Differentially Promotes Mast Cell Responsiveness to IL-33, Resulting in Enhancement of Type 2 Inflammation and Suppression of Neutrophilia. The Journal of Immunology. 212(9). 1407–1419. 2 indexed citations

Forfia, Paul R., Raymond L. Benza, Michele D’Alto, et al.. (2023). The heart of the matter: Right heart imaging indicators for treatment escalation in pulmonary arterial hypertension. Pulmonary Circulation. 13(2). e12240–e12240. 3 indexed citations

Ali, Mehboob, Mingjun Liu, Neil J. Kelly, et al.. (2023). A p53-TLR3 axis ameliorates pulmonary hypertension by inducing BMPR2 via IRF3. iScience. 26(2). 105935–105935. 11 indexed citations

Marco, Teresa De, Matthew R. Lammi, John Ryan, et al.. (2023). Regional Variation in Pulmonary Arterial Hypertension in the United States: The Pulmonary Hypertension Association Registry. Annals of the American Thoracic Society. 20(12). 1718–1725. 7 indexed citations

Straus, David B., et al.. (2021). IL-33 priming amplifies ATP-mediated mast cell cytokine production. Cellular Immunology. 371. 104470–104470. 10 indexed citations

Burger, Charles D., Daniel Grinnan, David Ralph, et al.. (2020). A Survey-based Estimate of COVID-19 Incidence and Outcomes among Patients with Pulmonary Arterial Hypertension or Chronic Thromboembolic Pulmonary Hypertension and Impact on the Process of Care. Annals of the American Thoracic Society. 17(12). 1576–1582. 39 indexed citations

10.

Ryan, John, Roham T. Zamanian, Ronald J. Oudiz, et al.. (2020). Care of patients with pulmonary arterial hypertension during the coronavirus (COVID‐19) pandemic. Pulmonary Circulation. 10(2). 1–7. 48 indexed citations

11.

Leary, Peter J., Nancy S. Jenny, David A. Bluemke, et al.. (2019). Endothelin-1, cardiac morphology, and heart failure: the MESA angiogenesis study. The Journal of Heart and Lung Transplantation. 39(1). 45–52. 14 indexed citations

12.

Abebayehu, Daniel, Andrew J. Spence, Amina Abdul Qayum, et al.. (2016). Lactic Acid Suppresses IL-33–Mediated Mast Cell Inflammatory Responses via Hypoxia-Inducible Factor-1α–Dependent miR-155 Suppression. The Journal of Immunology. 197(7). 2909–2917. 52 indexed citations

13.

Lee, Joshua F., Zachary Barrett‐O’Keefe, Ryan S. Garten, et al.. (2015). Evidence of microvascular dysfunction in heart failure with preserved ejection fraction. Heart. 102(4). 278–284. 89 indexed citations

14.

Marsboom, Glenn, Péter T. Tóth, John Ryan, et al.. (2012). Dynamin-Related Protein 1–Mediated Mitochondrial Mitotic Fission Permits Hyperproliferation of Vascular Smooth Muscle Cells and Offers a Novel Therapeutic Target in Pulmonary Hypertension. Circulation Research. 110(11). 1484–1497. 387 indexed citations

15.

Ryan, John, et al.. (2012). Mast cell-macrophage interactions alter inflammatory cytokine production. (177.10). The Journal of Immunology. 188(1_Supplement). 177.10–177.10. 4 indexed citations

16.

Pullen, Nick, Brian Barnstein, Yves T. Falanga, et al.. (2011). Novel Mechanism for FcϵRI-mediated Signal Transducer and Activator of Transcription 5 (STAT5) Tyrosine Phosphorylation and the Selective Influence of STAT5B over Mast Cell Cytokine Production. Journal of Biological Chemistry. 287(3). 2045–2054. 34 indexed citations

17.

Oskeritzian, Carole A., Megan M. Price, Nitai C. Hait, et al.. (2010). Essential roles of sphingosine-1–phosphate receptor 2 in human mast cell activation, anaphylaxis, and pulmonary edema. The Journal of Experimental Medicine. 207(3). 465–474. 101 indexed citations

18.

Norton, Sarah K., Brian Barnstein, Daniel P. Bailey, et al.. (2008). IL-10 Suppresses Mast Cell IgE Receptor Expression and Signaling In Vitro and In Vivo. The Journal of Immunology. 180(5). 2848–2854. 87 indexed citations

19.

Wright, Harry V., Daniel P. Bailey, Mohit Kashyap, et al.. (2006). IL-3-Mediated TNF Production Is Necessary for Mast Cell Development. The Journal of Immunology. 176(4). 2114–2121. 28 indexed citations

20.

Chong, Hey, Carlos Ramírez, Christopher P. Shelburne, et al.. (2004). IL-10 Inhibits FcεRI Expression in Mouse Mast Cells. The Journal of Immunology. 172(5). 3181–3188. 57 indexed citations

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.

Explore authors with similar magnitude of impact