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Qian Zhang, Gabriel A Al-Ghalith, Mayumi Kobayashi, Takahiro Segawa, Mitsuto Maeda, Satoshi Okabe, Dan Knights, Satoshi Ishii
Current approach to identify sources of human pathogens is largely dependent on the cultivation and isolation of target bacteria. For rapid pathogen source identification, culture-independent strain typing method is necessary. In this study, we designed new primer set that broadly covers flaA short variable region (SVR) of various Campylobacter species, and applied the flaA SVR sequencing method to examine the diversity of Campylobacter spp. in geese fecal samples ( n = 16) with and without bacteria cultivation...
2018: Frontiers in Microbiology
Toru Fujii, Yuji Shiozaki, Hiroko Segawa, Shiori Nishiguchi, Ai Hanazaki, Miwa Noguchi, Ruri Kirino, Sumire Sasaki, Kazuya Tanifuji, Megumi Koike, Mizuki Yokoyama, Yuki Arima, Ichiro Kaneko, Sawako Tatsumi, Mikiko Ito, Ken-Ichi Miyamoto
BACKGROUND: The role of Na+ -dependent inorganic phosphate (Pi) transporters in the human kidney is not fully clarified. Hereditary hypophosphatemic rickets with hypercalciuria (HHRH) is caused by loss-of-function mutations in the IIc Na+ -dependent Pi transporter (NPT2c/Npt2c/NaPi-IIc) gene. Another Na+ -dependent type II transporter, (NPT2A/Npt2a/NaPi-IIa), is also important for renal Pi reabsorption in humans. In mice, Npt2c deletion does not lead to hypophosphatemia and rickets because Npt2a compensates for the impaired Pi reabsorption...
October 13, 2018: Clinical and Experimental Nephrology
Yu Sunakawa, Kaoru Mogushi, Heinz-Josef Lenz, Wu Zhang, Akihito Tsuji, Takehiro Takahashi, Tadamichi Denda, Ken Shimada, Mitsugu Kochi, Masato Nakamura, Masahito Kotaka, Yoshihiko Segawa, Hiroaki Tanioka, Yuji Negoro, Miriana Moran, Stephanie H Astrow, Jack Hsiang, Craig Stephens, Masashi Fujii, Wataru Ichikawa
Molecular differences in tumor locations may contribute to the sidedness-specific response to cetuximab in metastatic colorectal cancer (mCRC). We investigated genes associated with the response to cetuximab treatment depending on tumor sidedness. Our study included 77 mCRC patients (13/63, right/left) with KRAS exon2 wild-type tumors from phase II trials of first-line therapy with cetuximab. Expression levels of 2551 genes were measured in tissue samples by HTG EdgeSeq Oncology Biomarker Panel. Univariate Cox regression analysis using log2 values of counts per million (CPM) was conducted in each sidedness to assess associations with clinical outcomes, and to define the optimal cutoff-point for clinically significant genes...
October 1, 2018: Molecular Cancer Therapeutics
Takumi Murakami, Takahiro Segawa, Nozomu Takeuchi, Gonzalo Barcaza Sepúlveda, Pedro Labarca, Shiro Kohshima, Yuichi Hongoh
The glacier stonefly Andiperla willinki is the largest metazoan inhabiting the Patagonian glaciers. In this study, we analysed the gut microbiome of the aquatic nymphs by 16S rRNA gene amplicon and metagenomic sequencing. The bacterial gut community was consistently dominated by taxa typical of animal digestive tracts, such as Dysgonomonadaceae and Lachnospiraceae, as well as those generally indigenous to glacier environments, such as Polaromonas. Interestingly, the dominant Polaromonas phylotypes detected in the stonefly gut were almost never detected in the glacier surface habitat...
September 24, 2018: Environmental Microbiology
Mutsumi Segawa, Cheng Wen, Izumi Orita, Satoshi Nakamura, Toshiaki Fukui
Ralstonia eutropha H16 contains both NADH- and NADPH-dependent reduction activities to acetoacetyl-CoA, and the NADPH-dependent activity is mediated by PhaB paralogs with (R)-stereospecificity providing (R)-3-hydroxybutyryl (3HB)-CoA monomer for poly((R)-3-hydroxybutyrate) synthesis. In contrast, the gene encoding the NADH-dependent enzyme has not been identified to date. This study focused on the NADH-dependent dehydrogenase with (S)-stereospecificity in R. eutropha, as the (S)-specific reduction of acetoacetyl-CoA potentially competed with the polyester biosynthesis via (R)-3HB-CoA...
September 19, 2018: Journal of Bioscience and Bioengineering
Kenji Kuwayama, Maika Nariai, Hajime Miyaguchi, Yuko T Iwata, Tatsuyuki Kanamori, Kenji Tsujikawa, Tadashi Yamamuro, Hiroki Segawa, Hiroko Abe, Hirotaro Iwase, Hiroyuki Inoue
During investigations of unnatural death, the time of death is generally estimated using anatomical examinations. However, it can be difficult to accurately determine the day of death, because postmortem changes in the body tissues can be greatly affected by the circumstances of the location of the corpse. We recently developed a method to estimate the day of drug ingestion, using micro-segmental hair analysis based on internal temporal markers (ITMs). In this method, ITMs are ingested at a specific time interval before hair collection to mark timescales within individual hair strands...
September 21, 2018: International Journal of Legal Medicine
Tsuyoshi Sekizuka, Koji Yatsu, Yuba Inamine, Takaya Segawa, Miho Nishio, Norimi Kishi, Makoto Kuroda
Antimicrobial resistance genes (ARGs) and the bacteria that harbor them are widely distributed in the environment, especially in surface water, sewage treatment plant effluent, soil, and animal waste. In this study, we isolated a KPC-2-producing Klebsiella pneumoniae strain (GSU10-3) from a sampling site in Tokyo Bay, Japan, near a wastewater treatment plant (WWTP) and determined its complete genome sequence. Strain GSU10-3 is resistant to most β-lactam antibiotics and other antimicrobial agents (quinolones and aminoglycosides)...
September 19, 2018: MSphere
Sadaki Samitsu, Hideki T Miyazaki, Hiroyo Segawa
This paper reports transmission and scattering spectra of poly(vinyl chloride) (PVC) in styrene liquid, which is derived from Christiansen effect. The spectra were measured by varying scattering angles. Further discussion on Christiansen color was provided in the paper entitled "Transmitting and scattering colors of porous particles of poly(vinyl chloride) based on Christiansen effect" (Samitsu et al., 2018) [1]. The paper additionally provides refractive indices of PVC reported in literatures because Christiansen effect has close relationship with wavelength-dependent refractive index, i...
October 2018: Data in Brief
Akihiko Suzuki, Takao Segawa, Syusaku Sawa, Chika Nishitani, Keiichi Ueda, Takuya Itou, Kiyoshi Asahina, Miwa Suzuki
AIMS: This study was conducted to assess the presence and extent of differences in the gut microbiota of common bottlenose dolphins depending on rearing facilities. METHODS AND RESULTS: Fecal samples were collected from 16 common bottlenose dolphins at three aquaria in Japan. After extracting DNA from the feces, the V3-V4 region of bacterial 16S rRNA was amplified and sequenced using Illumina MiSeq platform. The constituent phyla of the gut microbiota were similar among aquaria; however, the most dominant phylum differed depending on the facility, and the compositions of microbiota were remarkably varied at the family level among aquaria...
September 17, 2018: Journal of Applied Microbiology
Keiko Segawa, Shintaro Sugita, Tomoyuki Aoyama, Terufumi Kubo, Hiroko Asanuma, Taro Sugawara, Yumika Ito, Mitsuhiro Tsujiwaki, Hiromi Fujita, Makoto Emori, Tadashi Hasegawa
BACKGROUND: Clear cell sarcoma of soft tissue (CCSST) and clear cell sarcoma-like gastrointestinal tumor (CCSLGT) are malignant mesenchymal tumors that share some pathological features, but they also have several different characteristics. They are well known to express chimeric fusions of Ewing sarcoma breakpoint region 1 (EWSR1) and cAMP response element-binding protein (CREB) family members; namely, EWSR1-activating transcription factor 1 (ATF1) and EWSR1-CREB1. In addition, recent studies have suggested the presence of other fusions...
September 15, 2018: Diagnostic Pathology
Sawako Tatsumi, Kanako Katai, Ichiro Kaneko, Hiroko Segawa, Ken-Ichi Miyamoto
The solute carrier 34 (SLC34) family of membrane transporters is a major contributor to Pi homeostasis. Many factors are involved in regulating the SLC34 family. The roles of the bone mineral metabolism factors parathyroid hormone (PTH) and fibroblast growth factor 23 (FGF23) in Pi homeostasis are well studied. Intracellular Pi is thought to be involved in energy metabolism, such as ATP production. Under certain conditions of altered energy metabolism, plasma Pi concentrations are affected by the regulation of a Pi shift into cells or release from the tissues...
September 14, 2018: Pflügers Archiv: European Journal of Physiology
Shohei Sasaki, Hiroko Segawa, Ai Hanazaki, Ruri Kirino, Toru Fujii, Kayo Ikuta, Miwa Noguchi, Sumire Sasaki, Megumi Koike, Kazuya Tanifuji, Yuji Shiozaki, Ichiro Kaneko, Sawako Tatsumi, Takaaki Shimohata, Yoshichika Kawai, Sonoko Narisawa, José Luis Millán, Ken-Ichi Miyamoto
BACKGROUND/AIMS: Hyperphosphatemia is a serious complication of late-stage chronic kidney disease (CKD). Intestinal inorganic phosphate (Pi) handling plays an important role in Pi homeostasis in CKD. We investigated whether intestinal alkaline phosphatase 3 (Akp3), the enzyme that hydrolyzes dietary Pi compounds, is a target for the treatment of hyperphosphatemia in CKD. METHODS: We investigated Pi homeostasis in Akp3 knockout mice (Akp3-/-). We also studied the progression of renal failure in an Akp3-/- mouse adenine treated renal failure model...
September 13, 2018: Kidney & Blood Pressure Research
Tadashi Yamamuro, Shigehiko Miyamoto, Masashi Kitamura, Tomonori Muro, Yuko T Iwata, Hiroki Segawa, Kenji Kuwayama, Kenji Tsujikawa, Tatsuyuki Kanamori, Hiroyuki Inoue
In recent years, the need for analyzing cannabis DNA has increased in order to accommodate the various types of cannabis samples encountered in forensic investigation. This study was aimed to establish a simple and accurate cannabis DNA detection system using DNA chromatography. Two chromatography chip systems with different features were successfully developed. One system (the "four-line version") involves tetraplex PCR amplification, which could be used to detect cannabis DNA and distinguish between drug-type and fiber-type cannabis using the tetrahydrocannabinolic acid synthase gene sequence...
August 10, 2018: Forensic Science International
Takuya Imatoh, Kimie Sai, Mayu Takeyama, Katsuhito Hori, Masato Karayama, Kazuki Furuhashi, Katsunori Segawa, Michio Kimura, Junichi Kawakami, Yoshiro Saito
WHAT IS KNOWN AND OBJECTIVE: This study used electronic medical records to identify risk factors and establish a detection algorithm for denosumab-induced hypocalcaemia. METHODS: We identified 201 patients with cancer who were initially prescribed denosumab. Hypocalcaemia was defined as an adjusted serum calcium level of ≤2.13 mmol/L. A diagnosis of denosumab-induced hypocalcaemia was confirmed by two physicians after reviewing patient medical records. We evaluated patient characteristics as potential screening factors...
August 24, 2018: Journal of Clinical Pharmacy and Therapeutics
H Tsuchie, N Miyakoshi, K Iba, Y Kasukawa, K Nozaka, T Dohke, I Kosukegawa, T Aizawa, S Maekawa, H Abe, M Takeshima, T Tomite, T Segawa, K Ouchi, H Kinoshita, M Suzuki, T Yamashita, Y Shimada
We compared the effectiveness of promoting bone healing between two teriparatide preparations for atypical femoral fracture (AFF). A total of 45 AFFs were included in this study, and we compared the duration of bone union. Teriparatide administered by daily injection enhanced bone union more than weekly administration in complete AFFs. INTRODUCTION: The efficacy of teriparatide for atypical femoral fracture (AFF) has been recently reported. Although two different teriparatide preparations can be used to treat osteoporosis in Japan, daily or weekly injection, all previous reports on the effectiveness of teriparatide for AFF only examined daily injection formulations...
August 13, 2018: Osteoporosis International
Takahiro Segawa, Ryo Matsuzaki, Nozomu Takeuchi, Ayumi Akiyoshi, Francisco Navarro, Shin Sugiyama, Takahiro Yonezawa, Hiroshi Mori
Red-snow algae are red-pigmented unicellular algae that appear seasonally on the surface of thawing snow worldwide. Here, we analyse the distribution patterns of snow algae sampled from glaciers and snow patches in the Arctic and Antarctica based on nuclear ITS2 sequences, which evolve rapidly. The number of phylotypes is limited in both polar regions, and most are specific to either the Arctic or Antarctica. However, the bipolar phylotypes account for the largest share (37.3%) of all sequences, suggesting that red-algal blooms in polar regions may comprise mainly cosmopolitan phylotypes but also include endemic organisms, which are distributed either in the Arctic or Antarctica...
August 6, 2018: Nature Communications
Ryuji Nakamura, Hisao Kakuhara, Koyo Kikuchi, Takafumi Segawa, Hirobumi Oikawa, Kazuhiro Iwasaki, Wataru Obara, Hisanori Ariga
BACKGROUND/AIM: Secure dose escalation is required to compensate avoidance of concurrent chemotherapy in radiotherapy for increasing elderly bladder cancer. We aimed to evaluate the efficacy of lipiodol submucosally injected as a fiducial marker during image-guided radiotherapy (Lip-IGRT) for muscle invasive bladder cancer (BC). PATIENTS AND METHODS: Twenty-three patients with T2a-4aN0-1M0 BC underwent whole-bladder irradiation of 46 Gy and Lip-IGRT of 20 Gy, conventionally...
August 2018: Anticancer Research
Reiko Yamaguchi, Akimoto Nimura, Kentaro Amaha, Kumiko Yamaguchi, Yuko Segawa, Atsushi Okawa, Keiichi Akita
BACKGROUND: Anatomical knowledge of the tarsal canal and sinus is still unclear owing to the complexity of the ligamentous structures within them, particularly the relationship with the capsules of the subtalar joints. The aim of this study was to examine the anatomical relationship between the fibrous tissues of the tarsal canal and sinus and the articular capsules of the subtalar joint. METHODS: We conducted a descriptive anatomical study of 21 embalmed cadaveric ankles...
July 27, 2018: Foot & Ankle International
Yoshihisa Ishiura, Yasutaka Shiba, Yasushi Terasaki, Seiko Yoneyama, Kazutoshi Yamada, Yoshinobu Hinoue, Yoichi Ishida, Masataka Segawa, Yoshinori Doki, Kazuo Kasahara, Masaki Fujimura, Shinji Nakao, Takeshi Tamaki, Toshiki Shimizu, Shosaku Nomura
An increasing number of patients with lung cancer are undergoing outpatient chemotherapy, and thus, it is very important to maintain the quality of life(QOL)of these patients. Ninjin-Youei-To(TJ-108), a Japanese traditional medicine, has been reported to improve the QOL of patients with advanced cancer. However, the effect of TJ-108 in patients with lung cancer undergoing outpatient chemotherapy is unknown. Therefore, we conducted this study. To investigate factors influencing the QOL of these patients, we administered a QOL questionnaire,"The QOL Questionnaire for Cancer Patients Treated with Anticancer Drugs"(QOL-ACD)to 15 patients with non-small cell lung cancer...
July 2018: Gan to Kagaku Ryoho. Cancer & Chemotherapy
Guillaume Povie, Yasutomo Segawa, Taishi Nishihara, Yuhei Miyauchi, Kenichiro Itami
The synthesis and X-ray crystal structure of the first member of the carbon nanobelt family is reported. [12]Carbon nanobelt ([12]CNB) was originally obtained from a nickel-mediated reductive coupling reaction of a dodecabrominated macrocyclic precursor, albeit only in 1% yield. The present article reports on the development of this synthetic strategy and its extension to the preparation of the [16] and [24]CNB analogues. In particular, our extensive investigations on the final belt-forming, nickel-mediated reaction led to the development of a new ligand system that provides [12]CNB in up to 7% yield, contributing to the commercialization of [12]CNB...
August 8, 2018: Journal of the American Chemical Society
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