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102. New Trends and Advances in Oral and Maxillofacial Imaging

Author

Morimoto, Yasuhiro, Tanaka, Tatsurou, Yamamoto, Noriaki, Kodama, Masaaki, Seta, Yuji, Habu, Manabu, Oda, Masafumi, Kito, Shinji, Wakasugi-Sato, Nao, Matsumoto-Takeda, Shinobu, Fukai, Yasuhiro, Tokitsu, Takatoshi, Tomikawa, Megumi, Matoba, Kazunari, Yamashita, Yoshihiro, Yoshioka, Izumi, Takahashi, Tetsu, and Tominaga, Kazuhiro

Published
2009

104. Differences in amino acid frequency in CagA and VacA sequences of Helicobacter pylori distinguish gastric cancer from gastric MALT lymphoma

Author

Hashinaga, Masahiko, Suzuki, Rumiko, Akada, Junko, Matsumoto, Takashi, Kido, Yasutoshi, Okimoto, Tadayoshi, Kodama, Masaaki, Murakami, Kazunari, and Yamaoka, Yoshio

Subjects
Nucleotide sequencing -- Analysis, Helicobacter pylori -- Comparative analysis -- Health aspects -- Complications and side effects -- Genetic aspects, DNA sequencing -- Analysis, Amino acids -- Analysis, Health
Abstract

Background Helicobacter pylori is a pathogenic bacterium that causes various gastrointestinal diseases. The most common gastric malignancies associated with H. pylori are gastric cancer and lymphoma of mucosa associated lymphoid tissue (MALT). Helicobacter pylori virulence genes, namely cagA and vacA, are known to be associated with malignancy development. Conventionally, cagA and vacA were classified by looking at partial sequences of the genes. However, such genotyping has hardly proven useful predicting different risks for gastric cancer or MALT lymphoma. In search of new loci that distinguish these diseases, we investigated the full sequences of cagA and vacA. Results We compared cagA and vacA sequences of 18 and 12 H. pylori strains obtained, respectively, from patients with gastric cancer and MALT lymphoma in Oita, Japan. Conventional genotyping of cagA and vacA showed no significant difference between the two diseases. We further investigated the full protein sequences of CagA and VacA to identify loci where allele frequency was significantly different between the diseases. We found four such loci on CagA, and three such loci on VacA. We also inspected the corresponding loci on the genes of 22 gastritis strains that potentially lead to gastric cancer or MALT lymphoma in the long run. Significant differences were observed at one CagA locus between gastritis and MALT lymphoma strains, and at one VacA locus between gastritis and gastric cancer strains. Conclusions We found novel candidate loci in H. pylori virulence genes in association with two different types of gastric malignancies that could not be differentiated by conventional genotyping. Biological connotations of the amino acid polymorphisms merit further study. Keywords: Helicobacter pylori, cagA, vacA, Amino acid polymorphism, Next generation sequencing, Author(s): Masahiko Hashinaga[sup.1,2] , Rumiko Suzuki[sup.1] , Junko Akada[sup.1] , Takashi Matsumoto[sup.1] , Yasutoshi Kido[sup.1] , Tadayoshi Okimoto[sup.2] , Masaaki Kodama[sup.2,3] , Kazunari Murakami[sup.2] and Yoshio Yamaoka[sup.1,4] Background More than [...]

Published
2016
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114. Screening for Oral Cancer Using Electrochemical Telomerase Assay

Author

Division of Oral and Maxillofacial Surgery, Department of Science of Physical Functions, Kyushu Dental University, Fukuoka, Japan., Department of Applied Chemistry, Kyushu Institute of Technology, Fukuoka, Japan., Department of Oral and Maxillofacial Surgery, National Hospital Organization Kumamoto Medical Center, Kumamoto, Japan., Hayakawa, Mana, Sato, Shinobu, Diala, Irmina, Kodama, Masaaki, Tomoeda‐Mori, Kumiko, Haraguchi, Kazuya, Tominaga, Kazuhiro, Takenaka, Shigeori, Division of Oral and Maxillofacial Surgery, Department of Science of Physical Functions, Kyushu Dental University, Fukuoka, Japan., Department of Applied Chemistry, Kyushu Institute of Technology, Fukuoka, Japan., Department of Oral and Maxillofacial Surgery, National Hospital Organization Kumamoto Medical Center, Kumamoto, Japan., Hayakawa, Mana, Sato, Shinobu, Diala, Irmina, Kodama, Masaaki, Tomoeda‐Mori, Kumiko, Haraguchi, Kazuya, Tominaga, Kazuhiro, and Takenaka, Shigeori

Abstract

type:Journal Article, Electrochemical telomerase assay (ECTA) developed by our group was evaluated in an oral cancer screening using exfoliated oral cells and tissues obtained from patients of oral cancer, mucosa associated disease, or healthy volunteers. Telomerase activity from ECTA is correlated with hTERT mRNA expression level using a real‐time PCR and was increasing in the following order: healthy volunteer group

Published
2019

121. 246 Helicobacter pylori Infection Increases the Risk of Colorectal Polyps: A Large Scale Case-Control Study

Author

Kawahara, Yoshinari, primary, Kodama, Masaaki, additional, Mizukami, Kazuhiro, additional, Saito, Tomoko, additional, Hirashita, Yuka, additional, Sonoda, Akira, additional, Fukuda, Kensuke, additional, Matsunari, Osamu, additional, Okamoto, Kazuhisa, additional, Ogawa, Ryo, additional, Okimoto, Tadayoshi, additional, and Murakami, Kazunari, additional

Published
2019
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122. Examine the Availability and Safety of Mucosal Cutting Biopsy Technique for Diagnosis of Gastric Submucosal Tumor

Author

Mizukami, Kazuhiro, primary, Matsunari, Osamu, additional, Ogawa, Ryo, additional, Hirashita, Yuka, additional, Okamoto, Kazuhisa, additional, Fukuda, Kensuke, additional, Sonoda, Akira, additional, Akiyama, Hidetoshi, additional, Ozaka, Sotaro, additional, Kawahara, Yoshinari, additional, Okimoto, Tadayoshi, additional, Kodama, Masaaki, additional, and Murakami, Kazunari, additional

Published
2019
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125. Endoscopic gastric mucosal atrophy as a predictor of colorectal polyps: a large scale case-control study

Author

Kawahara, Yoshinari, primary, Kodama, Masaaki, additional, Mizukami, Kazuhiro, additional, Saito, Tomoko, additional, Hirashita, Yuka, additional, Sonoda, Akira, additional, Fukuda, Kensuke, additional, Matsunari, Osamu, additional, Okamoto, Kazuhisa, additional, Ogawa, Ryo, additional, Okimoto, Tadayoshi, additional, and Murakami, Kazunari, additional

Published
2019
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128. Helicobacter pylori infection and gastroduodenal diseases in Vietnam: a cross-sectional, hospital-based study

Author

Okimoto Tadayoshi, Matsuhisa Takeshi, Hoang Hai H, Ho Dung D, Thai Ky D, Le Song H, Mai Bang H, Ta Long, Trinh Dung T, Tsukamoto Yoshiyuki, Uchida Tomohisa, Nguyen Tung L, Kodama Masaaki, Murakami Kazunari, Fujioka Toshio, Yamaoka Yoshio, and Moriyama Masatsugu

Subjects
Diseases of the digestive system. Gastroenterology, RC799-869
Abstract

Abstract Background The rate of H. pylori infection in Vietnam is reportedly high, but the spectrum of H. pylori-associated gastroduodenal diseases has not been systematically investigated. Moreover, despite the similarities of ethnicity and diet, the age-standardized incidence rate of gastric cancer in the northern city of Hanoi is higher than that in the southern city of Ho Chi Minh, but the reason for this phenomenon is unknown. The virulence of Vietnamese H. pylori has also not been investigated in detail. Methods Individuals undergoing esophagogastroduodenoscopy were randomly recruited. H. pylori infection status was determined based on the combined results of culture, histology, immunohistochemistry, rapid urine test and serum ELISA. Peptic ulcer (PU) and gastroesophageal reflux disease was diagnosed by endoscopy, and chronic gastritis was determined histologically. H. pylori virulence factors were investigated by PCR and sequencing. Results Among the examined patients, 65.6% were infected with H. pylori. The prevalence of infection was significantly higher in those over 40 years of age than in those aged ≤40. Chronic gastritis was present in all H. pylori-infected individuals, 83.1% of whom had active gastritis, and 85.3% and 14.7% had atrophy and intestinal metaplasia, respectively. PU was present in 21% of infected patients, whereas its incidence was very low in non-infected individuals. The prevalence of PU was significantly higher in Hanoi than in Ho Chi Minh. The prevalence of vacA m1, which has been identified as an independent risk factor for PU in Vietnam, was significantly higher among H. pylori isolates from Hanoi than among those from Ho Chi Minh. Conclusions H. pylori infection is common in Vietnam and is strongly associated with PU, active gastritis, atrophy and intestinal metaplasia. vacA m1 is associated with an increased risk for PU and might contribute to the difference in the prevalence of PU and gastric cancer between Hanoi and Ho Chi Minh.

Published
2010
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131. Analysis of virulence factors of Helicobacter pylori isolated from a Vietnamese population

Author

Ta Long, Trinh Tuan, Matsuhisa Takeshi, Murakami Kazunari, Kodama Masaaki, Okimoto Tadayoshi, Takayama Akiko, Nguyen Lam, Uchida Tomohisa, Ho Dang, Hoang Hoa, Kishida Tetsuko, Fujioka Toshio, Moriyama Masatsugu, and Yamaoka Yoshio

Subjects
Microbiology, QR1-502
Abstract

Abstract Background The incidence of gastric cancer differs among countries in Asia, and it has been suggested that virulence factors associated with Helicobacter pylori are partly responsible. The aim of this study was to investigate several genetic factors regarded as virulence or molecular epidemiologic markers in H. pylori isolates from Vietnamese subjects. Results The cagA, vacA and cag right-end junction genotypes of 103 H. pylori strains from Vietnam (54 from Hanoi and 49 from Ho Chi Minh) were determined by PCR and sequencing. Three types of deletion in the region located upstream of the cagA Glu-Pro-Ile-Tyr-Ala (EPIYA) repeat region were identified: the 39-bp deletion type, the 18-bp deletion type, and the no-deletion type. The majority of strains studied (77%; 80/103) had the 18-bp deletion irrespective of geographical location in the country or clinical outcome. All of the 39-bp and 18-bp deletion-type strains possessed the East Asian type cagA repeat region. The type II cag right-end junction genotype was predominant (84%). The vacA m1 genotype was significantly more common in strains isolated in Hanoi, where the incidence of gastric cancer is higher, than in strains from Ho Chi Minh. Conclusion Pre-EPIYA-region typing of the cagA gene could provide a new genetic marker of H. pylori genomic diversity. Our data support the hypothesis that vacA m1 is closely associated with gastric carcinogenesis.

Published
2009
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132. Combination of retrograde superselective intra-arterial chemotherapy and Seldinger method in locally advanced oral cancer

Author

Uehara, Masataka, Ohya, Ryouichi, Kodama, Masaaki, Shiraishi, Takeshi, Asahina, Izumi, and Tominaga, Kazuhiro

Subjects
Mouth cancer -- Drug therapy -- Research, Chemotherapy -- Methods -- Analysis -- Health aspects -- Research, Health
Abstract

Byline: Masataka. Uehara, Ryouichi. Ohya, Masaaki. Kodama, Takeshi. Shiraishi, Izumi. Asahina, Kazuhiro. Tominaga The nonsurgical strategies for locally advanced oral cancer are desirable. Superselective intra-arterial infusion with radiotherapy was utilized [...]

Published
2015

137. A temporal shift of the evolutionary principle shaping intratumor heterogeneity in colorectal cancer

Author

Saito, Tomoko, primary, Niida, Atsushi, additional, Uchi, Ryutaro, additional, Hirata, Hidenari, additional, Komatsu, Hisateru, additional, Sakimura, Shotaro, additional, Hayashi, Shuto, additional, Nambara, Sho, additional, Kuroda, Yosuke, additional, Ito, Shuhei, additional, Eguchi, Hidetoshi, additional, Masuda, Takaaki, additional, Sugimachi, Keishi, additional, Tobo, Taro, additional, Nishida, Haruto, additional, Daa, Tsutomu, additional, Chiba, Kenichi, additional, Shiraishi, Yuichi, additional, Yoshizato, Tetsuichi, additional, Kodama, Masaaki, additional, Okimoto, Tadayoshi, additional, Mizukami, Kazuhiro, additional, Ogawa, Ryo, additional, Okamoto, Kazuhisa, additional, Shuto, Mitsutaka, additional, Fukuda, Kensuke, additional, Matsui, Yusuke, additional, Shimamura, Teppei, additional, Hasegawa, Takanori, additional, Doki, Yuichiro, additional, Nagayama, Satoshi, additional, Yamada, Kazutaka, additional, Kato, Mamoru, additional, Shibata, Tatsuhiro, additional, Mori, Masaki, additional, Aburatani, Hiroyuki, additional, Murakami, Kazunari, additional, Suzuki, Yutaka, additional, Ogawa, Seishi, additional, Miyano, Satoru, additional, and Mimori, Koshi, additional

Published
2018
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138. Significance and usefulness of imaging characteristics of gubernaculum tracts for the diagnosis of odontogenic tumors or cysts

Author

Oda, Masafumi, primary, Nishida, Ikuko, additional, Miyamoto, Ikuya, additional, Saeki, Katsura, additional, Tanaka, Tatsurou, additional, Kito, Shinji, additional, Yamamoto, Noriaki, additional, Yada, Naomi, additional, Yoshiga, Daigo, additional, Matsumoto-Takeda, Shinobu, additional, Wakasugi-Sato, Nao, additional, Habu, Manabu, additional, Kodama, Masaaki, additional, Kokuryo, Shinya, additional, Osawa, Kenji, additional, Nishimura, Shun, additional, Joujima, Takaaki, additional, Miyamura, Yuichi, additional, Matsuo, Kou, additional, Tominaga, Kazuhiro, additional, Yoshioka, Izumi, additional, Maki, Kenshi, additional, and Morimoto, Yasuhiro, additional

Published
2018
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140. Dysbiosis of the Gut Microbiota on the Inflammatory Background due to Lack of Suppressor of Cytokine Signalling-1 in Mice

Author

Gendo, Yoshiko, primary, Matsumoto, Takashi, additional, Kamiyama, Naganori, additional, Saechue, Benjawan, additional, Fukuda, Ciaki, additional, Dewayani, Astri, additional, Hidano, Shinya, additional, Noguchi, Kaori, additional, Sonoda, Akira, additional, Ozaki, Takashi , additional, Sachi, Nozomi, additional, Hirose, Haruna, additional, Ozaka, Sotaro, additional, Eshita, Yuki, additional, Mizukami, Kazuhiro, additional, Okimoto, Tadayoshi, additional, Kodama, Masaaki, additional, Yoshimatsu, Tomoko, additional, Nishida, Haruto, additional, Daa, Tsutomu, additional, Yamaoka, Yoshio, additional, Murakami, Kazunari, additional, and Kobayashi, Takashi, additional

Published
2018
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141. Endoscopic and Immunohistochemical Characteristics of Gastric Cancer with versus without Helicobacter Pylori Eradication

Author

Kodama, Masaaki, primary, Okimoto, Tadayoshi, additional, Mizukami, Kazuhiro, additional, Abe, Hisanori, additional, Ogawa, Ryo, additional, Okamoto, Kazuhisa, additional, Shuto, Mitsutaka, additional, Matsunari, Osamu, additional, Hirashita, Yuka, additional, Sato, Ryugo, additional, Abe, Takashi, additional, Nagai, Takayuki, additional, Arita, Tsuyoshi, additional, and Murakami, Kazunari, additional

Published
2018
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144. Ferrocenylnaphthalene Diimide-Based Electrochemical Detection of Aberrant Methylation in hTERT Gene

Author

Department of Applied Chemistry, Research Center for Biomicrosensing Technology, Kyushu Institute of Technology, Department of Applied Chemistry, Kyushu Institute of Technology, Department of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Science, Kyushu Dental College, Oral Bioresearch Center, Kyushu Dental College, Sato, Shinobu, Saeki, Toshiro, Tanaka, Tomoki, Kanezaki, Yusuke, Hayakawa, Mana, Haraguchi, Kazuya, Kodama, Masaaki, Nishihara, Tatsuji, Tominaga, Kazuhiro, Takenaka, Shigeori, Department of Applied Chemistry, Research Center for Biomicrosensing Technology, Kyushu Institute of Technology, Department of Applied Chemistry, Kyushu Institute of Technology, Department of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Science, Kyushu Dental College, Oral Bioresearch Center, Kyushu Dental College, Sato, Shinobu, Saeki, Toshiro, Tanaka, Tomoki, Kanezaki, Yusuke, Hayakawa, Mana, Haraguchi, Kazuya, Kodama, Masaaki, Nishihara, Tatsuji, Tominaga, Kazuhiro, and Takenaka, Shigeori

Abstract

type:Journal Article, Since aberrant methylation at CpG sites is linked to the silencing of tumor suppressor genes, DNA methylation analysis is important for cancer diagnosis. We developed ferrocenylnaphthalene diimide (FND), which has two ferrocenyl moieties at the substituent termini, as an electrochemical indicator for hybridized DNA duplexes. In this study, we attempted to detect aberrant methylation of human telomerase reverse transcriptase gene (hTERT), an efficient cancer marker, using FND-based hybridization coupled with electrochemical detection via a multi-electrode chip., source:https://doi.org/10.1007/s12010-014-1030-z

Published
2017

145. MOESM2 of Differences in amino acid frequency in CagA and VacA sequences of Helicobacter pylori distinguish gastric cancer from gastric MALT lymphoma

Author

Hashinaga, Masahiko, Suzuki, Rumiko, Akada, Junko, Matsumoto, Takashi, Kido, Yasutoshi, Okimoto, Tadayoshi, Kodama, Masaaki, Murakami, Kazunari, and Yamaoka, Yoshio

Abstract

Additional file 2: Figure S1. Phylogenetic tree of the 18 GC and 12 MALT strains with 1439 PubMLST strains. This tree shows 18 GC and 12 MALT strains in 1439 global strains obtained from the PubMLST database. Orange and green triangles represent GC and MALT strains, respectively. hspEAsia, hspMaori, and hspAmerind are subpopulations of hpEastAsia. All GC and MALT strains were included within hpEastAsia population. (NJ-tree, Kimura-2 parameters, MEGA v. 6.0.).

Published
2016
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146. Pseudo-nitzschia species, a possible causative organism of domoic acid in Spondylus versicolor collected from Nha Phu Bay, Khanh Hoa Province, Vietnam

Author

Dao, Viet Ha, Omura, Takuo, Takata, Yoshinobu, Pham, Xuan Ky, Fukuyo, Yasuwo, and Kodama, Masaaki

Subjects
domoic acid, tropical bivalve, Pseudo-nitzschia sp, Spondylus, amnesic shellfish poisoning
Abstract

Proceedings of the Horiba International Conference "New Direction of Ocean Research in the Western Pacific" : Past, Present and Future of UNESCO/IOC/WESTPAC Activity for 50 years and the JSPS Project "Coastal Marine Science", Section I: Research Articles/Harmful microalgae

Published
2012

147. High individual variation in the toxicity of three species of marine puffer in Vietnam

Author

Dao, Viet Ha, Nguyen, Tien Dung, Nguyen, Thu Hong, Takata, Yoshinobu, Sato, Shigeru, Kodama, Masaaki, and Fukuyo, Yasuwo

Subjects
toxic puffer, Lagocephalus sceleratus, Torquigener gloerfelti, Takifugu oblongus, tetrodotoxin
Abstract

Proceedings of the Horiba International Conference "New Direction of Ocean Research in the Western Pacific" : Past, Present and Future of UNESCO/IOC/WESTPAC Activity for 50 years and the JSPS Project "Coastal Marine Science", Section I: Research Articles/Harmful microalgae

Published
2012

148. 空気浮上実験装置を用いた非協力衛星とマニピュレータとの接触力学解析

Author

Kodama, Masaaki, Nakanishi, Hiroki, and Yoshida, Kazuya

Subjects
ロボットアーム, impedance model, エンドエフェクタ, control theory, 制御系設計, time lag, 時間遅れ, インピーダンスモデル, equation of motion, robot control, 制御理論, end effector, satellite capture, manipulator, マニピュレータ, equivalent mass, 運動方程式, impedance control, 衛星捕獲, robot arm, インピーダンス制御, contact dynamics, 接触力学, ロボット制御, control system design, 等価質量
Abstract

宇宙空間において、ターゲットを捕獲する場合、初期接触でターゲットを弾き飛ばさないことが必須である。手先インピーダンス制御を用いて手先の見かけの慣性特性をコントロールすることによって接触力を減少させることが可能であるが、実際の宇宙空間では接触時間が非常に短く、また、ロボットの制御時間遅れや敏捷性が影響するために、ターゲットとの接触を維持することは容易ではない。本論文では、フリーフライングロボットにおける手先インピーダンス制御を用いたロボットアームと2次元微小重力環境を模擬できる空気浮上型実験装置を用いて接触力学解析を行う。, This paper presents the analysis on the contact dynamics between a robotic manipulator under impedance control and a floating target in space. After the contact of two free-flying bodies in space, both parties are easily bounced away and start rotating by the contact force. In order to reduce the contact force in satellite capture, the dynamic conditions between the manipulator under impedance control and a free flying target are investigated. As evaluation criteria, the equivalent mass of the tip of the manipulator coming from the impedance control is discussed. The influence of the impedance characteristics and the control time delay upon the equivalent mass are evaluated using experiments and numerical simulations. To replicate microgravity environment, a airfloating testbed on a stone surface plate is used., 資料番号: AA0063718062

Published
2008

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