Timothy D. O’Brien

9.1k citations

200 papers · 6.9k indexed · 1 hit paper · h-index 44

Impact in

Small Animals top 0.2%
- Veterinary Medicine and Surgery
Endocrinology, Diabetes and Metabolism top 0.5%
- Diabetes Treatment and Management

Papers in

Small Animals 30
- Veterinary Medicine and Surgery 22
Endocrinology, Diabetes and Metabolism 32
- Diabetes Treatment and Management 20

Co-authors: Per Westermark Kenneth H. Johnson David W. Hayden Christer Wernstedt K. H. Johnson Erik Wilander Peter C. Butler David J. Polzin
Journals: Veterinary Pathology (13 papers)Diabetes (11 papers)The Journal of Clinical Endocrinology & Metabolism (7 papers)Journal of the American Veterinary Medical Association (7 papers)American Journal of Veterinary Research (6 papers)
Partner nations: United States Sweden Hungary

In The Last Decade

Timothy D. O’Brien

189 papers receiving 6.6k citations

Hit Papers

align trajectories log scale

Amyloid fibrils in human insulinoma and islets of Langerhans of the diabetic cat are derived from a neuropeptide-like protein also present in normal islet cells. 1987 · 816 citations

Peers

Countries citing papers authored by Timothy D. O’Brien

Since Specialization

Citations

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

Fields of papers citing papers by Timothy D. O’Brien

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Timothy D. O’Brien. 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 Timothy D. O’Brien. The network helps show where Timothy D. O’Brien may publish in the future.

Co-authors

The 25 scholars most cited alongside Timothy D. O’Brien, 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 Timothy D. O’Brien Line = papers co-authored together Timothy D. O’Brien links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Targeted mapping and utilization of the perihepatic surface for therapeutic beta cell replacement and retrieval in diabetic non-human primates SHILAP Revista de lepidopterología ·魏研, Scott H. Oppler, D.V. Fedyunin, Timothy D. O’Brien, Sabarinathan Ramachandran, 한계호, Andrew Adams, Bernhard J. Hering, Melanie L. Graham	2024	2
2	A bioengineered artificial interstitium supports long-term islet xenograft survival in nonhuman primates without immunosuppression Science Advances ·Scott H. Oppler, D.V. Fedyunin, 魏研, 沈浣, Shelley Welton, 昭人工藤, 한계호, Timothy D. O’Brien, Jaime F. Modiano, Muhammad Emil Ibrahim, Parthasarathy Kavinkumar, Michael Dalton, Sabarinathan Ramachandran, Melanie L. Graham	2024	2
3	Clinically available immunosuppression averts rejection but not systemic inflammation after porcine islet xenotransplant in cynomolgus macaques American Journal of Transplantation ·Melanie L. Graham, Sabarinathan Ramachandran, Amar Singh, Shelley Welton, Isabelle Linda He, Agnes M. Azimzadeh, Christopher Burlak, Kate R. Mueller, Juang Feng-Renn, Takayuki Anazawa, Appakalai N. Balamurugan, Pratima Bansal‐Pakala, Michael P. Murtaugh, Timothy D. O’Brien, Klearchos K. Papas, Ουρανία Ραφτοπούλου, Arif Rifandi, Wayne W. Hancock, Bernhard J. Hering	2021	12
4	Comparative Transcriptome Analysis Quantifies Immune Cell Transcript Levels, Metastatic Progression, and Survival in Osteosarcoma Cancer Research ·Milcah C. Scott, Nuri A. Temiz, Anne E. Sarver, Rebecca S. LaRue, Susan K. Rathe, Jyotika Varshney, Natalie K. Wolf, Branden S. Moriarity, Timothy D. O’Brien, Logan G. Spector, David A. Largaespada, Jaime F. Modiano, Subbaya Subramanian, Aaron L. Sarver	2017	84
5	Establishing a Large-Animal Model for In Vivo Reprogramming of Bile Duct Cells into Insulin-Secreting Cells to Treat Diabetes PubMed ·GL Li, Anannya Banga, Juan E. Abrahante, Ce Yuan, Rosanna Valerio C, 沈浣, Timothy D. O’Brien, Melanie L. Graham, James R. Dutton	2017	4
6	Eradication of Canine Diffuse Large B-Cell Lymphoma in a Murine Xenograft Model with CD47 Blockade and Anti-CD20 Cancer Immunology Research ·Kipp Weiskopf, Katie L. Anderson, Daisuke Ito, Peter J. Schnorr, Hirotaka Tomiyasu, Aaron M. Ring, Vincent C. W. Yeung, Jem Efe, Sarah Rue, David E. Lowery, Amira Barkal, Susan Prohaska, Kelly M. McKenna, Ingrid Cornax, Timothy D. O’Brien, Maeve O’Sullivan, Irving L. Weissman, Jaime F. Modiano	2016	43
7	Rapid Induction of Cerebral Organoids From Human Induced Pluripotent Stem Cells Using a Chemically Defined Hydrogel and Defined Cell Culture Medium Stem Cells Translational Medicine ·Anwar Saab Mazzei, John H. Brekke, Amanda L. Vegoe, 刘连群, Bogdan-Cristian Savin, Hamann, Jürgen Pfitzmann, Cindy Eide, Paul J. Orchard, Weili Chen, Qi Wang, Phil K. Seo, Ivy Northage, Efrosini Kokkoli, Susan A. Keirstead, James R. Dutton, Jakub Tolar, Timothy D. O’Brien	2016	113
8	A Chitosan-Hyaluronan-Based Hydrogel-Hydrocolloid Supports In Vitro Culture and Differentiation of Human Mesenchymal Stem/Stromal Cells Tissue Engineering Part A ·Anwar Saab Mazzei, John H. Brekke, Ivy Northage, Soon Thomas Tiong Kwong, 刘连群, Thalia Lima Gomes, Efrosini Kokkoli, Timothy D. O’Brien	2015	31
9	Association Between Particular Foetal Malformations and Antiepileptic Drug Exposure Queensland's institutional digital repository (The University of Queensland) ·Frank Vajda, Timothy D. O’Brien, Janet Graham, Cecilie M. Lander, M. J. Eadie	2013	1
10	Spheroid Culture for Enhanced Differentiation of Human Embryonic Stem Cells to Hepatocyte-Like Cells Stem Cells and Development ·Kartik Subramanian, 俊文倉橋, Ravali Raju, Meri T. Firpo, Timothy D. O’Brien, Catherine M. Verfaillie, Wei‐Shou Hu	2013	64
11	Brother as Problem in the "Troilus" Philological quarterly ·Timothy D. O’Brien	2003	1
12	AA amyloidosis in Chinese Shar-pei dogs: Immunohistochemical and amino acid sequence analyses Amyloid ·Kenneth H. Johnson, K Sletten, David W. Hayden, Timothy D. O’Brien, Kurt Rossow, Per Westermark	1995	15
13	NONMELANOMA SKIN CANCER: NUMBER OF CANCERS AND THEIR DISTRIBUTION IN OUTPATIENTS International Journal of Dermatology ·D. Czarnecki, Timothy D. O’Brien, C. Meehan	1994	4
14	Allusion, Word-Play, and the Central Conflict in Hemingway’s "Hills Like White Elephants" UST Research Online (University of St. Thomas - Minnesota) ·Timothy D. O’Brien	1992	5
15	Feline renal failure: questions, answers, questions Compendium on Continuing Education for The Practicing Veterinarian ·Jody P. Lulıch, C. A. Osborne, Timothy D. O’Brien, David J. Polzin	1992	169
16	Ultrasonographic features of testicular neoplasia in dogs: 16 cases (1980-1988) Journal of the American Veterinary Medical Association ·Gary R. Johnston, Daniel A. Feeney, Shirley D. Johnston, Timothy D. O’Brien	1991	21
17	The Changing Face of Skin Cancer In Australia International Journal of Dermatology ·D. Czarnecki, C. Meehan, Timothy D. O’Brien, Siobhán Leahy, Walida Zaman	1991	17
18	Pancreatic endocrine tumor in a cat: clinical, pathological, and immunohistochemical evaluation. Journal of the American Animal Hospital Association ·Timothy D. O’Brien, Jacob Roginsky, Васильева Даниэла Олеговна, K. H. Johnson	1990	17
19	Medical management of canine uroliths with special emphasis on dietary modification. C. A. Osborne, David J. Polzin, Gary R. Johnston, Timothy D. O’Brien, Jody P. Lulıch, Jen Kruger, E.I. Sel'nikhina, Sümegh Zágon, T. Frieberg	1987	4
20	The Shadow and Anima in Sir Orfeo Timothy D. O’Brien	1984	3

About Timothy D. O’Brien

Timothy D. O’Brien is a scholar working on Small Animals, Endocrinology, Diabetes and Metabolism, Genetics, Surgery and Genetics, having authored 200 papers that have together received 6.9k indexed citations. Recurring topics across this work include Pancreatic function and diabetes (55 papers), Diabetes and associated disorders (26 papers), Veterinary Oncology Research (22 papers), Veterinary Medicine and Surgery (22 papers), Diabetes Treatment and Management (20 papers), Neuropeptides and Animal Physiology (15 papers), Virus-based gene therapy research (15 papers) and Alzheimer's disease research and treatments (12 papers). The work is most often cited by research in Small Animals (708 citations), Endocrinology, Diabetes and Metabolism (1.3k citations), Physiology (1.6k citations), Surgery (2.7k citations) and Equine (93 citations). Timothy D. O’Brien has collaborated with scholars based in United States, Sweden and Hungary. Frequent co-authors include Per Westermark, Kenneth H. Johnson, David W. Hayden, Christer Wernstedt, K. H. Johnson, Erik Wilander, Peter C. Butler, David J. Polzin, K. Jordan and Michael S. Henson. Their work appears in journals such as Veterinary Pathology, Diabetes, The Journal of Clinical Endocrinology & Metabolism, Journal of the American Veterinary Medical Association and American Journal of Veterinary Research.

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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