Tomohisa Okaya

872 total citations
22 papers, 723 citations indexed

About

Tomohisa Okaya is a scholar working on Surgery, Immunology and Molecular Biology. According to data from OpenAlex, Tomohisa Okaya has authored 22 papers receiving a total of 723 indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Surgery, 8 papers in Immunology and 6 papers in Molecular Biology. Recurrent topics in Tomohisa Okaya's work include Immune Response and Inflammation (8 papers), Organ Transplantation Techniques and Outcomes (8 papers) and Liver Disease and Transplantation (3 papers). Tomohisa Okaya is often cited by papers focused on Immune Response and Inflammation (8 papers), Organ Transplantation Techniques and Outcomes (8 papers) and Liver Disease and Transplantation (3 papers). Tomohisa Okaya collaborates with scholars based in United States, Japan and Switzerland. Tomohisa Okaya's co-authors include Alex B. Lentsch, Atsushi Kato, Rebecca Schuster, Charles C. Caldwell, Thomas L. Husted, Cem Gabay, André Martignoni, John Blanchard, Hector R. Wong and Satoshi Kuboki and has published in prestigious journals such as SHILAP Revista de lepidopterología, Hepatology and Cancer Research.

In The Last Decade

Tomohisa Okaya

21 papers receiving 715 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Tomohisa Okaya United States 12 322 268 234 133 133 22 723
Gerald M. McGuire United States 9 254 0.8× 155 0.6× 178 0.8× 93 0.7× 241 1.8× 10 709
Hirohisa Harada Japan 16 428 1.3× 149 0.6× 217 0.9× 115 0.9× 64 0.5× 46 783
Tianfei Lu China 11 171 0.5× 262 1.0× 130 0.6× 158 1.2× 75 0.6× 26 570
Lesley J. Millatt France 10 248 0.8× 374 1.4× 116 0.5× 372 2.8× 30 0.2× 13 975
Daisuke Yoshinari Japan 13 167 0.5× 147 0.5× 65 0.3× 58 0.4× 79 0.6× 43 478
Daniela Spampinato Italy 12 331 1.0× 532 2.0× 60 0.3× 332 2.5× 103 0.8× 17 1.1k
Michelle Kirby United States 12 316 1.0× 243 0.9× 115 0.5× 471 3.5× 56 0.4× 16 933
Morgane Baron France 9 159 0.5× 422 1.6× 112 0.5× 484 3.6× 264 2.0× 16 986
Jun Dai China 10 164 0.5× 151 0.6× 150 0.6× 65 0.5× 39 0.3× 21 575
Jeffrey A. Handy United States 7 265 0.8× 359 1.3× 131 0.6× 690 5.2× 37 0.3× 10 1.1k

Countries citing papers authored by Tomohisa Okaya

Since Specialization
Citations

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

Fields of papers citing papers by Tomohisa Okaya

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Tomohisa Okaya

This figure shows the co-authorship network connecting the top 25 collaborators of Tomohisa Okaya. A scholar is included among the top collaborators of Tomohisa Okaya 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 Tomohisa Okaya. Tomohisa Okaya is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Okaya, Tomohisa, Ayako Shigeta, Nobuhiro Tanabe, et al.. (2024). Significance of Normal Lung Volume on Quantitative CT Imaging Analysis in Group 1 and Group 3 Pulmonary Hypertension. SHILAP Revista de lepidopterología. 2(4). 100062–100062. 1 indexed citations
2.
Kawasaki, Takeshi, Koichiro Tatsumi, Tomohisa Okaya, et al.. (2024). Transcriptome Analysis of Fibroblasts in Hypoxia-Induced Vascular Remodeling: Functional Roles of CD26/DPP4. International Journal of Molecular Sciences. 25(23). 12599–12599. 1 indexed citations
3.
Sakurai, Yoichi, Yusuke Nakamura, Hiroyuki Fukuda, et al.. (2023). Gastric type III heterotopic pancreas presenting as adenomyoma in the antrum of the stomach: a case report. Clinical Journal of Gastroenterology. 17(1). 34–40. 2 indexed citations
4.
Sakurai, Yoichi, et al.. (2020). A case of gastric ischemia caused by massive gastric dilatation due to superior mesenteric artery syndrome. Clinical Journal of Gastroenterology. 13(6). 1066–1069. 4 indexed citations
5.
Okaya, Tomohisa, Koji Nakagawa, Fumio Kimura, et al.. (2011). The alterations in hepatic microcirculation and Kupffer cell activity after biliary drainage in jaundiced mice. Journal of Hepato-Biliary-Pancreatic Sciences. 19(4). 397–404. 6 indexed citations
6.
Okaya, Tomohisa, Shinichi Hayashi, Kazuo Yamamoto, et al.. (2009). TWO CASES OF EXTRAHEPATIC CHOLANGIOCARCINOMA WITHOUT JAUNDICE. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 70(9). 2781–2785. 1 indexed citations
7.
Zahedi, Kamyar, Alex B. Lentsch, Tomohisa Okaya, et al.. (2009). Spermidine/spermine-N1-acetyltransferase ablation protects against liver and kidney ischemia-reperfusion injury in mice. American Journal of Physiology-Gastrointestinal and Liver Physiology. 296(4). G899–G909. 34 indexed citations
8.
Okaya, Tomohisa, Koji Nakagawa, Fumio Kimura, et al.. (2009). Obstructive jaundice impedes hepatic microcirculation in mice.. PubMed. 55(88). 2146–50. 4 indexed citations
9.
Kuboki, Satoshi, Tomohisa Okaya, Rebecca Schuster, et al.. (2006). Hepatocyte NF-κB activation is hepatoprotective during ischemia-reperfusion injury and is augmented by ischemic hypothermia. American Journal of Physiology-Gastrointestinal and Liver Physiology. 292(1). G201–G207. 64 indexed citations
10.
Okaya, Tomohisa, John Blanchard, Rebecca Schuster, et al.. (2005). AGE-DEPENDENT RESPONSES TO HEPATIC ISCHEMIA/REPERFUSION INJURY. Shock. 24(5). 421–427. 76 indexed citations
11.
Barone, Sharon, Tomohisa Okaya, Steve Rudich, et al.. (2005). Distinct and sequential upregulation of genes regulating cell growth and cell cycle progression during hepatic ischemia-reperfusion injury. American Journal of Physiology-Cell Physiology. 289(4). C826–C835. 51 indexed citations
12.
Caldwell, Charles C., Tomohisa Okaya, André Martignoni, et al.. (2005). Divergent functions of CD4+T lymphocytes in acute liver inflammation and injury after ischemia-reperfusion. American Journal of Physiology-Gastrointestinal and Liver Physiology. 289(5). G969–G976. 100 indexed citations
13.
Mayhew, Christopher N., Emily E. Bosco, Sejal R. Fox, et al.. (2005). Liver-Specific pRB Loss Results in Ectopic Cell Cycle Entry and Aberrant Ploidy. Cancer Research. 65(11). 4568–4577. 77 indexed citations
14.
Okaya, Tomohisa & Alex B. Lentsch. (2004). Peroxisome proliferator-activated receptor-α regulates postischemic liver injury. American Journal of Physiology-Gastrointestinal and Liver Physiology. 286(4). G606–G612. 56 indexed citations
15.
Okaya, Tomohisa & Alex B. Lentsch. (2004). Hepatic expression of S32A/S36A IκBα does not reduce postischemic liver injury. Journal of Surgical Research. 124(2). 244–249. 14 indexed citations
16.
Okaya, Tomohisa, et al.. (2004). Involvement of the neuropeptide substance P in lung inflammation induced by hepatic ischemia/reperfusion. Inflammation Research. 53(6). 257–261. 11 indexed citations
17.
Kato, Atsushi, Tomohisa Okaya, & Alex B. Lentsch. (2003). Endogenous IL-13 protects hepatocytes and vascular endothelial cells during ischemia/reperfusion injury. Hepatology. 37(2). 304–312. 34 indexed citations
18.
Okaya, Tomohisa & Alex B. Lentsch. (2003). Cytokine Cascades and the Hepatic Inflammatory Response to Ischemia and Reperfusion. Journal of Investigative Surgery. 16(3). 141–147. 1 indexed citations
19.
Kato, Atsushi, Cem Gabay, Tomohisa Okaya, & Alex B. Lentsch. (2002). Specific Role of Interleukin-1 in Hepatic Neutrophil Recruitment after Ischemia/Reperfusion. American Journal Of Pathology. 161(5). 1797–1803. 89 indexed citations
20.
Miyazaki, Masaru, Hiroshi Ito, Koji Nakagawa, et al.. (2001). Unilateral hepatic artery reconstruction is unnecessary in biliary tract carcinomas involving lobar hepatic artery: implications of interlobar hepatic artery and its preservation.. PubMed. 47(36). 1526–30. 35 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

Breakdown of academic impact, for papers by Gerald M. McGuire Breakdown of academic impact, for papers by Hirohisa Harada Breakdown of academic impact, for papers by Tianfei Lu Breakdown of academic impact, for papers by Lesley J. Millatt Breakdown of academic impact, for papers by Daisuke Yoshinari Breakdown of academic impact, for papers by Daniela Spampinato Breakdown of academic impact, for papers by Michelle Kirby Breakdown of academic impact, for papers by Morgane Baron Breakdown of academic impact, for papers by Jun Dai Breakdown of academic impact, for papers by Jeffrey A. Handy
Rankless by CCL
2026