Keiji Sakai

608 total citations
24 papers, 486 citations indexed

About

Keiji Sakai is a scholar working on Endocrinology, Diabetes and Metabolism, Obstetrics and Gynecology and Molecular Biology. According to data from OpenAlex, Keiji Sakai has authored 24 papers receiving a total of 486 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Endocrinology, Diabetes and Metabolism, 7 papers in Obstetrics and Gynecology and 6 papers in Molecular Biology. Recurrent topics in Keiji Sakai's work include Growth Hormone and Insulin-like Growth Factors (11 papers), Pregnancy and preeclampsia studies (7 papers) and Birth, Development, and Health (5 papers). Keiji Sakai is often cited by papers focused on Growth Hormone and Insulin-like Growth Factors (11 papers), Pregnancy and preeclampsia studies (7 papers) and Birth, Development, and Health (5 papers). Keiji Sakai collaborates with scholars based in Japan, Iran and United States. Keiji Sakai's co-authors include Mitsutoshi Iwashita, David R. Clemmons, Maryam Kabir‐Salmani, Shigetatsu Shiokawa, Yoshihiro Akimoto, Jane B. Clarke, Shinya Nagamatsu, Yukio Nakamura, Walker H. Busby and Henry B. Lowman and has published in prestigious journals such as Journal of Biological Chemistry, The Journal of Clinical Endocrinology & Metabolism and Diabetes.

In The Last Decade

Keiji Sakai

24 papers receiving 477 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Keiji Sakai Japan 16 146 140 131 126 82 24 486
Shelly Tartakover Matalon Israel 17 89 0.6× 159 1.1× 164 1.3× 95 0.8× 46 0.6× 31 645
Shigehito Kamimura Japan 11 112 0.8× 183 1.3× 74 0.6× 32 0.3× 50 0.6× 19 584
Ioanna Bouba Greece 13 112 0.8× 147 1.1× 71 0.5× 83 0.7× 122 1.5× 31 561
Michał Pyźlak Poland 15 225 1.5× 103 0.7× 157 1.2× 22 0.2× 127 1.5× 52 528
Agnieszka Gach Poland 11 63 0.4× 202 1.4× 57 0.4× 147 1.2× 85 1.0× 52 570
Venkateshwari Ananthapur India 15 128 0.9× 154 1.1× 134 1.0× 16 0.1× 66 0.8× 73 547
F Gómez United States 8 113 0.8× 85 0.6× 65 0.5× 246 2.0× 145 1.8× 12 461
S. J. Lye Canada 9 261 1.8× 172 1.2× 137 1.0× 28 0.2× 171 2.1× 13 477
Aiping Qin China 15 115 0.8× 119 0.8× 174 1.3× 37 0.3× 50 0.6× 48 595

Countries citing papers authored by Keiji Sakai

Since Specialization
Citations

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

Fields of papers citing papers by Keiji Sakai

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keiji Sakai

This figure shows the co-authorship network connecting the top 25 collaborators of Keiji Sakai. A scholar is included among the top collaborators of Keiji Sakai 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 Keiji Sakai. Keiji Sakai 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.
Kobayashi, Yoichi, et al.. (2017). Ramelteon, a selective MT1/MT2 receptor agonist, suppresses the proliferation and invasiveness of endometrial cancer cells. Human Cell. 30(3). 209–215. 19 indexed citations
2.
Tanaka, Kei, Keiji Sakai, Takashi Nagashima, et al.. (2016). Branched-chain amino acids regulate insulin-like growth factor-binding protein 1 (IGFBP1) production by decidua and influence trophoblast migration through IGFBP1. Molecular Human Reproduction. 22(8). 890–899. 9 indexed citations
3.
Kimura, Tōru, Shinji Tanigaki, Toshiyuki Fukutomi, et al.. (2014). Paracellular route is the major urate transport pathway across the blood-placental barrier. Physiological Reports. 2(5). e12013–e12013. 11 indexed citations
4.
Tanaka, Kei, et al.. (2014). Intrapartum group B Streptococcus screening using real-time polymerase chain reaction in Japanese population. The Journal of Maternal-Fetal & Neonatal Medicine. 29(1). 130–134. 15 indexed citations
5.
Tanaka, Kei, et al.. (2014). Prenatal diagnosis of Klippel–Trenaunay–Weber syndrome with Kasabach–Merritt syndrome in utero. Journal of Medical Ultrasonics. 42(1). 109–112. 10 indexed citations
6.
Tanaka, Kei, Shinji Tanigaki, Noriko Miyazaki, et al.. (2013). Prenatal Diagnosis of Umbilical Artery Thrombosis. Fetal Diagnosis and Therapy. 35(2). 148–150. 15 indexed citations
7.
Sakai, Keiji, et al.. (2013). Hypoxia alters phosphorylation status of insulin‐like growth factor (IGF)‐binding protein‐1 and attenuates biological activities of IGF‐I in HepG2 cell cultures. Journal of obstetrics and gynaecology research. 39(9). 1367–1373. 8 indexed citations
8.
Sakai, Keiji, et al.. (2012). Improvement of insulin sensitivity promotes extravillous trophoblast cell migration stimulated by insulin-like growth factor-I. Endocrine Journal. 60(3). 359–368. 29 indexed citations
9.
Shibuya, Hiromi, et al.. (2010). Polymerization of insulin‐like growth factor‐binding protein‐1 (IGFBP‐1) potentiates IGF‐I actions in placenta. Journal of Cellular Physiology. 226(2). 434–439. 14 indexed citations
10.
11.
Shimizu, Yūji, Maryam Kabir‐Salmani, Mehri Azadbakht, et al.. (2008). Expression and Localization of Galectin-9 in the Human Uterodome. Endocrine Journal. 55(5). 879–887. 39 indexed citations
12.
Kabir‐Salmani, Maryam, Michiko N. Fukuda, Masami Kanai‐Azuma, et al.. (2007). The Membrane-Spanning Domain of CD98 Heavy Chain Promotes αvβ3 Integrin Signals in Human Extravillous Trophoblasts. Molecular Endocrinology. 22(3). 707–715. 24 indexed citations
13.
14.
Kabir‐Salmani, Maryam, Shigetatsu Shiokawa, Yoshihiro Akimoto, et al.. (2003). αvβ3 Integrin Signaling Pathway Is Involved in Insulin-Like Growth Factor I-Stimulated Human Extravillous Trophoblast Cell Migration. Endocrinology. 144(4). 1620–1630. 53 indexed citations
15.
Shiokawa, Shigetatsu, Yoshihiro Akimoto, Keiji Sakai, et al.. (2003). Physiologic Role of Decidual .BETA.1 Integrin and Focal Adhesion Kinase in Embryonic Implantation. Endocrine Journal. 50(2). 189–198. 15 indexed citations
16.
Sakai, Keiji, Henry B. Lowman, & David R. Clemmons. (2002). Increases in Free, Unbound Insulin-like Growth Factor I Enhance Insulin Responsiveness in Human Hepatoma G2 Cells in Culture. Journal of Biological Chemistry. 277(16). 13620–13627. 30 indexed citations
17.
Sakai, Keiji, A. Joseph D’Ercole, Liam J. Murphy, & David R. Clemmons. (2001). Physiological Differences in Insulin-Like Growth Factor Binding Protein-1 (IGFBP-1) Phosphorylation in IGFBP-1 Transgenic Mice. Diabetes. 50(1). 32–38. 32 indexed citations
18.
Sakai, Keiji, Walker H. Busby, Jane B. Clarke, & David R. Clemmons. (2001). Tissue Transglutaminase Facilitates the Polymerization of Insulin-like Growth Factor-binding Protein-1 (IGFBP-1) and Leads to Loss of IGFBP-1's Ability to Inhibit Insulin-like Growth Factor-I-stimulated Protein Synthesis. Journal of Biological Chemistry. 276(12). 8740–8745. 40 indexed citations
19.
Iwashita, Mitsutoshi, et al.. (1997). Regulation of decidual IGF-binding proteins and protease activity by placental hormones. Placenta. 18. 53–62. 1 indexed citations
20.
Sakai, Keiji, Mitsutoshi Iwashita, & Yoshihiko Takeda. (1997). Profiles of Insulin-Like Growth Factor Binding Proteins and the Protease Activity in the Maternal Circulation and Its Local Regulation Between Placenta and Decidua.. Endocrine Journal. 44(3). 409–417. 21 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.

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