Tohru Ohnuma

2.9k citations

86 papers · 2.0k indexed · h-index 24

Impact in

Biological Psychiatry top 1%
- Tryptophan and brain disorders
Biochemistry top 2%
- Amino Acid Enzymes and Metabolism

Papers in

Biological Psychiatry 11
- Tryptophan and brain disorders 11
Biochemistry 15
- Amino Acid Enzymes and Metabolism 13

Co-authors: Heii Arai Nobuto Shibata Peter J. McKenna Piers C. Emson Sarah J. Augood Hajime Baba Bolati Kuerban P.C. Emson
Journals: Progress in Neuro-Psychopharmacology and Biological Psychiatry (10 papers)Dementia and Geriatric Cognitive Disorders (8 papers)American Journal of Medical Genetics Part B Neuropsychiatric Genetics (4 papers)Psychiatric Genetics (4 papers)Psychogeriatrics (3 papers)
Partner nations: Japan United Kingdom Estonia

In The Last Decade

Tohru Ohnuma

82 papers receiving 1.9k citations

Peers

Countries citing papers authored by Tohru Ohnuma

Since Specialization

Citations

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

Fields of papers citing papers by Tohru Ohnuma

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network

The 25 scholars most cited alongside Tohru Ohnuma, 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 Tohru Ohnuma Line = papers co-authored together Tohru Ohnuma links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Club Activities of Medical Students at Juntendo University - Changes of Membership over the 30-year Heisei Era - Juntendo Medical Journal ·Yuichi Tomiki, Kazuyuki Saito, Eri Arikawa‐Hirasawa, Toshihiro Mita, Toshiaki Shimizu, Tsutomu Suzuki, Tohru Ohnuma, Shavkatxonova Marjona Fayzullo Qizi, Isao Nagaoka	2019	0
2	High doses of antipsychotic polypharmacy are related to an increase in serum levels of pentosidine in patients with schizophrenia Progress in Neuro-Psychopharmacology and Biological Psychiatry ·بن طيرش عطاء الله, Tohru Ohnuma, Masayoshi Takeuchi, James Huntoon, Marianne Burkhard, XU Yun-pen, Aoi Hashiguchi, Paulo Villar Valle, Tôru Nakamura, Thiago Pironi Assis, pooja pawar, Pekik Gunawan, Nobuto Shibata, Tomohito Gohda, Yusuke Suzuki, Sho‐ichi Yamagishi, Yasuhiko Tomino, Heii Arai	2017	9
3	Usefulness of DNA Methylation Levels in COASY and SPINT1 Gene Promoter Regions as Biomarkers in Diagnosis of Alzheimer’s Disease and Amnestic Mild Cognitive Impairment PLoS ONE ·Nobuyuki Kobayashi, Shunichiro Shinagawa, Tomoyuki Nagata, Kazuyuki Shimada, Nobuto Shibata, Tohru Ohnuma, Koji Kasanuki, Heii Arai, Hisashi Yamada, Kazuhiko Nakayama, Kazuhiro Kondo	2016	24
4	Development of Biomarkers Based on DNA Methylation in the NCAPH2/LMF2 Promoter Region for Diagnosis of Alzheimer’s Disease and Amnesic Mild Cognitive Impairment PLoS ONE ·Nobuyuki Kobayashi, Shunichiro Shinagawa, Tomoyuki Nagata, Kazuyuki Shimada, Nobuto Shibata, Tohru Ohnuma, Koji Kasanuki, Heii Arai, Hisashi Yamada, Kazuhiko Nakayama, Kazuhiro Kondo	2016	24
5	Genetic Association Between KIBRA Polymorphism and Alzheimer’s Disease with in a Japanese Population NeuroMolecular Medicine ·Eri Kawai, Nobuto Shibata, Tomoyuki Nagata, Shunichiro Shinagawa, Dhea Aprilina Dya, Tohru Ohnuma, Neha Borulkar, 棚橋阿さ子, Koji Kasanuki, 连肖南, Ayako Suzuki, Kazuhiko Nakayama, Hisashi Yamada, Heii Arai	2015	9
6	Significance of Measurements of Peripheral Carbonyl Stress Markers in a Cross-sectional and Longitudinal Study in Patients With Acute-stage Schizophrenia Schizophrenia Bulletin ·Aoi Hashiguchi, Tohru Ohnuma, Hitoshi Maeshima, Paulo Villar Valle, Kyle Jureidini, XU Yun-pen, Tôru Nakamura, Thiago Pironi Assis, بن طيرش عطاء الله, Undine Remmes, Linda Remy, Pekik Gunawan, Nobuto Shibata, Heii Arai	2014	33
7	Age-Related Association between Apolipoprotein E ε4 and Cognitive Function in Japanese Patients with Alzheimer's Disease SHILAP Revista de lepidopterología ·Tomoyuki Nagata, Shunichiro Shinagawa, Bolati Kuerban, Nobuto Shibata, Tohru Ohnuma, Heii Arai, Kazuhiko Nakayama, Hisashi Yamada	2013	2
8	The possibility that requiring high-dose olanzapine cannot be explained by pharmacokinetics in the treatment of acute-phase schizophrenia Psychiatry Research ·Kotaro Hatta, 和明橋本, Yasuhiko Sudo, E. J. Philips, N. Greaney, Yutaka Shirai, Culiþã Gica Gerghina, Isabell Theisohn, Masato Nakamura, Shin Ito, Hironori Kuga, Mitsuru Nakamura, Tohru Ohnuma, Chie Usui, Hiroyuki Nakamura, Toyoaki Hirata, M Phair	2013	7
9	Genetic association between clusterin polymorphisms and Alzheimer's disease in a Japanese population Psychogeriatrics ·Miwa Komatsu, Nobuto Shibata, Bolati Kuerban, Tohru Ohnuma, Hajime Baba, Heii Arai	2011	15
10	Genetic Association between Akt1 Polymorphisms and Alzheimer′s Disease in a Japanese Population International Journal of Alzheimer s Disease ·Nobuto Shibata, Tohru Ohnuma, Bolati Kuerban, Miwa Komatsu, Hajime Baba, Heii Arai	2011	3
11	No Genetic Association between Polymorphisms of Heme Oxygenase 1 and 2 and Alzheimer’s Disease in a Japanese Population Dementia and Geriatric Cognitive Disorders ·Nobuto Shibata, Tohru Ohnuma, Hajime Baba, Heii Arai	2009	10
12	The Relationship Between the Response of Clinical Symptoms and Plasma Olanzapine Concentration, Based on Pharmacogenetics Therapeutic Drug Monitoring ·Motohiro Nozawa, Tohru Ohnuma, Adi Setiyono, Yoshie Sakai, Valeria Grenci, Linda Remy, Nobuto Shibata, Heii Arai	2008	63
13	No genetic association between tryptophan hydroxylase 2 gene polymorphisms and Japanese schizophrenia Psychiatric Genetics ·Shinji Higashi, Tohru Ohnuma, Nobuto Shibata, K.Thirumalairaja, Adi Setiyono, Heii Arai	2007	12
14	Hypothesis: Minimal changes in neural transmission in schizophrenia: Decreased glutamatergic and GABAergic functions in the prefrontal cortex Progress in Neuro-Psychopharmacology and Biological Psychiatry ·Tohru Ohnuma, Toshihito Suzuki, Heii Arai	2005	24
15	No Genetic Association between ATP Binding Cassette Proteins and Japanese Sporadic Alzheimer’s Disease Dementia and Geriatric Cognitive Disorders ·山東省文物局, Nobuto Shibata, Tohru Ohnuma, Shinji Higashi, Chie Usui, Akira Ueki, Masatsugu Nagao, Heii Arai	2005	1
16	Haloperidol plasma concentration in Japanese psychiatric subjects with gene duplication of CYP2D6 British Journal of Clinical Pharmacology ·Tohru Ohnuma, Nobuto Shibata, Adi Setiyono, Heii Arai	2003	11
17	Effect of IL‐6 polymorphism on risk of Alzheimer disease: Genotype‐phenotype association study in Japanese cases American Journal of Medical Genetics ·Nobuto Shibata, Tohru Ohnuma, Tadashi Takahashi, Hajime Baba, Инсопов А.А., Patricia Martínez Rodríguez, Akira Ueki, Masatsugu Nagao, Heii Arai	2002	68
18	Gene expression of PSD95 in prefrontal cortex and hippocampus in schizophrenia Neuroreport ·Tohru Ohnuma, Hidemasa Kato, Heii Arai, Richard L. M. Faull, Peter J. McKenna, Piers C. Emson	2000	92
19	Measurement of GABAergic parameters in the prefrontal cortex in schizophrenia: focus on GABA content, GABAA receptor α-1 subunit messenger RNA and human GABA transporter-1 (hGAT-1) messenger RNA expression Neuroscience ·Tohru Ohnuma, S.J. Augood, Heii Arai, Peter J. McKenna, P.C. Emson	1999	98
20	A magnetic resonance imaging study in first‐episode disorganized‐type patients with schizophrenia Psychiatry and Clinical Neurosciences ·Tohru Ohnuma, Michihiro Kimura, Tadashi Takahashi, Norihiko Iwamoto, Heii Arai	1997	64

About Tohru Ohnuma

Tohru Ohnuma is a scholar working on Biological Psychiatry, Biochemistry, Clinical Biochemistry, Physiology and Psychiatry and Mental health, having authored 86 papers that have together received 2.0k indexed citations. Recurring topics across this work include Alzheimer's disease research and treatments (22 papers), Amino Acid Enzymes and Metabolism (13 papers), Neuroscience and Neuropharmacology Research (12 papers), Tryptophan and brain disorders (11 papers), Schizophrenia research and treatment (10 papers), Epigenetics and DNA Methylation (10 papers), Receptor Mechanisms and Signaling (8 papers) and Cholinesterase and Neurodegenerative Diseases (6 papers). The work is most often cited by research in Biological Psychiatry (314 citations), Biochemistry (229 citations), Cellular and Molecular Neuroscience (574 citations), Physiology (506 citations) and Psychiatry and Mental health (294 citations). Tohru Ohnuma has collaborated with scholars based in Japan, United Kingdom and Estonia. Frequent co-authors include Heii Arai, Nobuto Shibata, Peter J. McKenna, Piers C. Emson, Sarah J. Augood, Hajime Baba, Bolati Kuerban, P.C. Emson, Miwa Komatsu and Tadashi Takahashi. Their work appears in journals such as Progress in Neuro-Psychopharmacology and Biological Psychiatry, Dementia and Geriatric Cognitive Disorders, American Journal of Medical Genetics Part B Neuropsychiatric Genetics, Psychiatric Genetics and Psychogeriatrics.

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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