Keiichi Homma

ORCID: 0000-0002-9603-0874
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About
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Research Areas
  • RNA and protein synthesis mechanisms
  • Genomics and Phylogenetic Studies
  • Breast Cancer Treatment Studies
  • Breast Lesions and Carcinomas
  • Protein Structure and Dynamics
  • Machine Learning in Bioinformatics
  • Medical Imaging Techniques and Applications
  • RNA Research and Splicing
  • RNA modifications and cancer
  • Cellular transport and secretion
  • Genomics and Chromatin Dynamics
  • Metastasis and carcinoma case studies
  • Glycosylation and Glycoproteins Research
  • Bacterial Genetics and Biotechnology
  • MRI in cancer diagnosis
  • Lymphoma Diagnosis and Treatment
  • Gastrointestinal Tumor Research and Treatment
  • Endoplasmic Reticulum Stress and Disease
  • Marine and coastal ecosystems
  • Plant Reproductive Biology
  • Molecular Biology Techniques and Applications
  • Gastrointestinal disorders and treatments
  • Breast Implant and Reconstruction
  • Protist diversity and phylogeny
  • CNS Lymphoma Diagnosis and Treatment

Maebashi Institute of Technology
2008-2024

Niigata Cancer Center Hospital
2010-2021

Obayashi (Japan)
2018

University of Massachusetts Chan Medical School
2018

Bank of Japan
2002-2012

National Institute of Genetics
2002-2012

Kameda Medical Center
2011

Research Organization of Information and Systems
2004-2011

Teikyo University
2011

Dokkyo University
2011

Tadashi Imanishi Takeshi Itoh Yutaka Suzuki Claire O’Donovan Satoshi Fukuchi and 95 more Kanako O. Koyanagi Roberto A. Barrero Takuro Tamura Yumi Yamaguchi‐Kabata Motohiko Tanino Kei Yura Satoru Miyazaki Kazuho Ikeo Keiichi Homma Arek Kasprzyk Tetsuo Nishikawa Mika Hirakawa Jean Thierry‐Mieg Danielle Thierry‐Mieg Jennifer Ashurst Libin Jia Mitsuteru Nakao Michael A. Thomas Nicola Mulder Youla Karavidopoulou Lihua Jin Sangsoo Kim Tomohiro Yasuda Boris Lenhard Éric Eveno Yoshiyuki Suzuki Chisato Yamasaki Jun‐ichi Takeda Craig A. Gough Phillip B. Hilton Yasuyuki Fujii Hiroaki Sakai Susumu Tanaka Clara Amid M. Bellgard Maria de Fátima Bonaldo Hidemasa Bono Susan K. Bromberg Anthony J. Brookes Elspeth A. Bruford Piero Carninci Claude Chelala C Couillault Sandro J. de Souza Marie-Anne Debily Marie‐Dominique Devignes Inna Dubchak Toshinori Endo Anne Estreicher Eduardo Eyras Kaoru Fukami-Kobayashi Gopal Gopinath Esther Graudens Yoonsoo Hahn Michael Han Ze‐Guang Han Kousuke Hanada Hideki Hanaoka Erimi Harada Katsuyuki Hashimoto Ursula Hinz Momoki Hirai Teruyoshi Hishiki Ian Hopkinson Sandrine Imbeaud Hidetoshi Inoko Alexander Kanapin Yayoi Kaneko Takeya Kasukawa Janet Kelso Paul Kersey Reiko Kikuno Kouichi Kimura Bernhard Korn Vladimir Kuryshev Izabela Makałowska Takashi Makino Shuhei Mano Régine Mariage‐Samson Jun Mashima Hideo Matsuda Hans‐Werner Mewes Satoshi Minoshima Keiichi Nagai Hideki Nagasaki Naoki Nagata Rajni Nigam Osamu Ogasawara Osamu Ohara Masafumi Ohtsubo Norihiro Okada Toshihisa Okido Satoshi Oota Motonori Ota Toshio Ota

The human genome sequence defines our inherent biological potential; the realization of biology encoded therein requires knowledge function each gene. Currently, in this area is still limited. Several lines investigation have been used to elucidate structure and genes genome. Even so, gene prediction remains a difficult task, as varieties transcripts may vary great extent. We thus performed an exhaustive integrative characterization 41,118 full-length cDNAs that capture complete functional...

10.1371/journal.pbio.0020162 article EN cc-by PLoS Biology 2004-04-19

Phosphatidylinositol 4,5-biphosphate (PtdIns(4,5)P2), an important element in eukaryotic signal transduction, is synthesized either by phosphatidylinositol-4-phosphate 5-kinase (PtdIns(4)P 5K) from phosphatidylinositol 4-phosphate (PtdIns(4)P) or phosphatidylinositol-5-phosphate 4-kinase (PtdIns(5)P 4K) 5-phosphate (PtdIns(5)P). Two Saccharomyces cerevisiae genes, MSS4 and FAB1, are homologous to mammalian PtdIns(4)P 5Ks PtdIns(5)P 4Ks. We show here that a functional homolog of 5K but not 4K...

10.1074/jbc.273.25.15779 article EN cc-by Journal of Biological Chemistry 1998-06-01

Autophagy is a process of self-digestion generally observed in eukaryotes and has been shown to play crucial roles for survival under starvation removal deleterious substances. Despite great advances that have made, many problems mechanisms autophagy remain unsolved. As large number autophagy-related proteins are identified each species, database collects data, identifies their homologs other species makes them available will contribute research advancement. no such resources exist, we built...

10.1093/nar/gkq995 article EN Nucleic Acids Research 2010-10-23

IVL is characterized by a propensity for intravascular tumor cell proliferation. Premortem diagnosis of difficult because its nonspecific clinical, laboratory, and imaging manifestations. This study examined cerebral MR patterns their changes with without chemotherapy. Nine 11 patients studied presented abnormal findings. We define 5 findings: 1) infarctlike lesions, 2) white matter 3) meningeal enhancement, 4) masslike 5) hyperintense lesions in the pons on T2WI. Seven only 1 pattern, while...

10.3174/ajnr.a2770 article EN cc-by American Journal of Neuroradiology 2011-12-15

Although structural domains in proteins (SDs) are important, half of the regions human proteome currently left with no SD assignments. These unassigned consist not only novel SDs, but also intrinsically disordered (ID) since proteins, especially those eukaryotes, generally contain a significant fraction ID regions. As can be inferred from amino acid sequences, method that combines and region assignments determine fractions SDs any proteome.In contrast to other available prediction programs...

10.1186/1472-6807-11-29 article EN cc-by BMC Structural Biology 2011-01-01

ABSTRACT We sequenced the genome of Theileria orientalis , a tick-borne apicomplexan protozoan parasite cattle. The focus this study was comparative analysis T . relative to other highly pathogenic species, parva and annulata induce transformation infected cells lymphocyte or macrophage/monocyte lineages; in contrast, does not uncontrolled proliferation leukocytes multiplies predominantly within erythrocytes. While synteny across homologous chromosomes three species found be well conserved...

10.1128/mbio.00204-12 article EN mBio 2012-09-05

O-glycosylation of mammalian proteins is one the important posttranslational modifications. We applied a support vector machine (SVM) to predict whether Ser or Thr glycosylated, in order elucidate mechanism. O-glycosylated sites were often found clustered along sequence, whereas other located sporadically. Therefore, we developed two types SVMs for predicting and isolated separately. that amino acid composition was effective type, site-specific algorithm type. The highest prediction accuracy...

10.3390/ijms11124991 article EN cc-by International Journal of Molecular Sciences 2010-12-03

We present two cases of ciliated muconodular papillary tumour (CMPT) in this report. CMPT is a newly defined low-grade malignant with columnar epithelial cells, occurring the peripheral lung. Both patients underwent pulmonary resection due to an enlarged solitary nodule. Pathological findings both confirmed mixture and goblet cells. The tumours were rich mucous had spread along alveolar walls, as observed bronchioloalveolar carcinoma. Nuclear atypia was mild, no mitotic activity observed....

10.1510/icvts.2009.229989 article EN Interactive Cardiovascular and Thoracic Surgery 2010-08-20

Abstract Molecular characteristics of carcinoma arising from mature cystic teratoma the ovary (MCT) remain unclear due to its rarity. We analyzed RNA-sequencing data 2322 pan-cancer [1378 squamous cell carcinomas (SCC), 6 adenosquamous (ASC), and 938 adenocarcinomas (AC)] including six MCT (four SCCs, one ASC, AC). Hierarchical clustering principal component analysis showed that gene expression profiles were different between each histological type SCCs (MCT-SCCs) was apparently similar...

10.1038/s41388-020-1237-0 article EN cc-by Oncogene 2020-03-02

Abstract BACKGROUND: The objective of this study was to confirm, by means a multicenter conducted in Japan, the reliability and usefulness one‐step nucleic acid amplification (OSNA) assay routine clinical use for sentinel lymph node biopsy (SLNB) breast cancer patients. METHODS: Patients with Tis‐T2N0M0 who underwent SLNB before systemic chemotherapy comprised cohort. A whole (SLN) examined intraoperatively OSNA except 1‐mm‐thick, central slice node, which pathologic examination after...

10.1002/cncr.26683 article EN Cancer 2012-01-17

Carcinoma of possible thymic epithelial origin may occur within the thyroid gland, which was first reported by Miyauchi et al. as intrathyroid thymoma (ITET). ITET is a rare tumor comprising about 0.08% all primary malignancies. It low-grade carcinoma with squamous cell differentiation whose overall survival rate found to be 71%. Lymph node metastasis at surgery in 40% and hematogenous metastases developed bones, liver lungs. This grows gland invades into parenchyma well extrathyroid...

10.14670/hh-28.543 article EN PubMed 2013-05-01

Aims SMAD 4 acts as a tumour suppressor, and the loss of is associated with poor prognosis in colorectal cancer ( CRC ) patients. Although next‐generation sequencing NGS enabled us to detect numerous genetic alterations single assay, clinical significance alteration detected has not been fully investigated. The aim this study was evaluate clinicopathological characteristics . Methods results We retrospectively investigated 201 patients stage I– IV , by using 415‐gene panel. To analyse...

10.1111/his.13805 article EN cc-by-nc Histopathology 2019-01-12

This study seeks to determine whether high-resolution in vitro helical CT can show the internal structure of small axillary nodes and establish characteristics benign versus metastatic patients with breast cancer.We obtained images 212 excised from 19 cancer. The longest mean size was 5.9 mm, range 0.5 26.5 mm. hilar cortical characteristics, size, ratio axis shortest were evaluated. findings correlated histologic findings.Pathologic assessment a central low-density hilum visualized on...

10.2214/ajr.176.4.1761069 article EN American Journal of Roentgenology 2001-04-01

Ribosome biogenesis starts with transcription of the large ribosomal RNA precursor (47S pre-rRNA), which soon combines numerous factors to form 90S pre-ribosome in nucleolus. Although subsequent separation pre-90S particle into pre-40S and pre-60S particles is critical for production process mature small subunits, its molecular mechanisms remain undetermined. Here, we present evidence that p32, fibrillarin (FBL), Nop52 play key roles this step. Mass-based analyses combined immunoblotting...

10.1074/mcp.m110.006148 article EN cc-by Molecular & Cellular Proteomics 2011-05-03

Pancreatic ductal adenocarcinoma (PDAC) is currently one of the most intractable malignancies with a typical scirrhous pattern in histology.Due to its abundant tumor stroma and scant vascularization, chemotherapeutic agents are considered inefficiently permeable cancer nests, making it highly difficult cure patients PDAC.However, PDAC also owe intractability other critical factors such as cellular interaction between cells microenvironment well architectural barriers, which increases...

10.7150/jca.24415 article EN cc-by-nc Journal of Cancer 2018-01-01

Assignment of all transcription factors (TFs) from genome sequence data is not a straightforward task due to the wide variation in TFs among different species. A DNA binding domain (DBD) and contiguous non-DBD with characteristic SCOP or Pfam combination are observed most members TF families. We found that experimentally verified prokaryotes detectable by domains assigned DBDs non-DBDs. Based on this finding, we set up rules detect classify them into 52 Application 154 entirely sequenced...

10.1093/dnares/dsi016 article EN cc-by-nc DNA Research 2006-01-09

ABSTRACT A new method of determining the dependence cell growth on initial volume in absence division is presented. The assumptions are that a certain period time either increasing or decreasing, but not both, and independent history cells. Applying this to Gonyaulax polyedra 12 h light-12 dark cycle, between 3rd 12th hours light found be more exponential-like than linear. magnitude determined solely by environmental conditions, age. All cells decrease slightly from 23rd hour, then increase...

10.1242/jcs.92.2.303 article EN Journal of Cell Science 1989-02-01

In addition to structural domains, most eukaryotic proteins possess intrinsically disordered (ID) regions. Although ID regions often play important functional roles, their accurate identification is difficult. As human transcription factors (TFs) constitute a typical group of with long regions, we regarded them as model all and attempted accurately classify TFs into domains an extremely high fraction besides DNA binding and/or other was detected in our previous investigation, 20% the...

10.1186/1472-6807-9-26 article EN cc-by BMC Structural Biology 2009-01-01

The Genomes TO Protein Structures and Functions (GTOP) database (http://spock.genes.nig.ac.jp/~genome/gtop.html) freely provides an extensive collection of information on protein structures functions obtained by application various computational tools to the amino acid sequences entirely sequenced genomes. GTOP contains annotations 3D structures, families, functions, other useful data a interest in user-friendly ways give deep insight into structure. From initial 1999 version, has been...

10.1093/nar/gkn855 article EN cc-by-nc Nucleic Acids Research 2008-11-06
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