Keizo Oka

474 total citations
9 papers, 381 citations indexed

About

Keizo Oka is a scholar working on Molecular Biology, Immunology and Obstetrics and Gynecology. According to data from OpenAlex, Keizo Oka has authored 9 papers receiving a total of 381 indexed citations (citations by other indexed papers that have themselves been cited), including 5 papers in Molecular Biology, 3 papers in Immunology and 2 papers in Obstetrics and Gynecology. Recurrent topics in Keizo Oka's work include Pregnancy and preeclampsia studies (2 papers), Reproductive System and Pregnancy (2 papers) and Muscle Physiology and Disorders (2 papers). Keizo Oka is often cited by papers focused on Pregnancy and preeclampsia studies (2 papers), Reproductive System and Pregnancy (2 papers) and Muscle Physiology and Disorders (2 papers). Keizo Oka collaborates with scholars based in Japan and United States. Keizo Oka's co-authors include Atsushi Inoue, Hitoshi Hasegawa, Masaki Yasukawa, Masashi Kohno, Tatsuhiko Miyazaki, Satoshi Fujiwara, Hironobu Harada, Koji Furukawa, Takanori Ohnishi and Shinji Iwata and has published in prestigious journals such as Biochemical and Biophysical Research Communications, International Journal of Oncology and Parasitology Research.

In The Last Decade

Keizo Oka

9 papers receiving 374 citations

Peers

Keizo Oka

MB

PHARM

CR

CMN

ONCOL

Katherine A Blood Canada

C. González-García Spain

Jun Kotoyori Japan

Jonathon Judkins United States

Lorenzo Goglia Italy

Ken C. Walls United States

Carina Raynoschek Sweden

Nobutaka Ohkubo Japan

Natalie A. Eriksson Australia

Kejing Zhang China

Katherine A Blood Canada

Keizo Oka

258 ×1.6

MB

156 ×1.2

PHARM

105 ×1.3

CR

43 ×0.6

CMN

133 ×3.4

ONCOL

Citations per year, relative to Keizo Oka Keizo Oka (= 1×) peers Katherine A Blood

Countries citing papers authored by Keizo Oka

Since Specialization

Citations

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

Fields of papers citing papers by Keizo Oka

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keizo Oka

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

All Works

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9 of 9 papers shown

1.

Matsubara, Keiichi, et al.. (2008). Cytokine Regulation of Intercellular Adhesion Molecule-1 Expression on Trophoblasts in Preeclampsia. Gynecologic and Obstetric Investigation. 66(1). 27–33. 18 indexed citations

2.

Fujiwara, Satoshi, Kou Nakagawa, Hironobu Harada, et al.. (2007). Silencing hypoxia-inducible factor-1α inhibits cell migration and invasion under hypoxic environment in malignant gliomas. International Journal of Oncology. 30(4). 793–802. 116 indexed citations

3.

Kohno, Masashi, Hitoshi Hasegawa, Atsushi Inoue, et al.. (2006). Identification of N-arachidonylglycine as the endogenous ligand for orphan G-protein-coupled receptor GPR18. Biochemical and Biophysical Research Communications. 347(3). 827–832. 207 indexed citations

4.

Matsubara, Keiichi, et al.. (2003). Elevated Levels of Adhesion Molecules Derived from Leukocytes and Endothelial Cells in Patients with Pregnancy‐Induced Hypertension. Hypertension in Pregnancy. 22(1). 31–43. 20 indexed citations

5.

Oka, Keizo, et al.. (2002). Light-induced Changes of PKC Alpha Immunoreactivity in Rod Bipolar Cells of Normal and RD Mice. 43(13). 741–741. 2 indexed citations

6.

Fukui, Keisuke, et al.. (1995). The Effect of Follicular Fluid on Intracellular Free Calcium Levels in Human Spermatozoa. PubMed. 21(1). 43–49. 1 indexed citations

7.

Tsuboi, Takafumi, Motomi Torii, Keizo Oka, & Kazumitsu Hirai. (1994). Hepatotrophic activity in mouse serum infected with plerocercoids ofSpirometra erinacei. Parasitology Research. 80(8). 629–633. 1 indexed citations

8.

Sumida, Michihiro, et al.. (1990). Multiforms of Mammalian Adenylate Kinase and ItsMonoclonal Antibody against AK(1). Enzyme. 43(2). 57–71. 5 indexed citations

9.

HAMADA, Minoru, Hiromichi Okuda, Keizo Oka, et al.. (1981). An aberrant adenylate kinase isoenzyme from the serum of patients with Duchenne muscular dystrophy. Biochimica et Biophysica Acta (BBA) - Enzymology. 660(2). 227–237. 11 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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