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Toshinari Onishi, Kaoruko Sengoku, Yasuhiro Ichibori, Isamu Mizote, Koichi Maeda, Toru Kuratani, Yoshiki Sawa, Yasushi Sakata
Transcatheter aortic valve implantation (TAVI) is an effective and less invasive treatment for the increasing population of individuals with severe aortic stenosis (AS). Echocardiography is crucial in the assessment of AS patients from pre- to post-procedure. Transthoracic echocardiography (TTE) may be used to assess patient suitability for TAVI, as well as evaluate the severity of AS, the aortic valve complex, aortic valve morphology, mitral regurgitation (MR), and left ventricular function. Transesophageal echocardiography (TEE) is usually used as an intra-procedural monitoring tool to provide feedback during the procedure, to assess prosthetic valve function, and to detect complications rapidly before and after balloon aortic valvuloplasty (BAV) or transcatheter heart valve (THV) deployment...
February 2018: Cardiovascular Diagnosis and Therapy
Miho Ibi, Sawa Horie, Seiko Kyakumoto, Naoyuki Chosa, Mariko Yoshida, Masaharu Kamo, Masato Ohtsuka, Akira Ishisaki
Many inflammatory cells are known to home to inflamed temporomandibular joint (TMJ) tissues by stimulation with cytokines and chemokines produced by inflammatory lesions in the TMJ. However, how the inflammatory cells affect the progression of inflammation in TMJ synovial tissues after their homing to inflamed TMJ site is still uncertain. Here, we isolated and cultured TMJ synoviocyte-like cells (TMJSCs) from murine TMJ tissues. We demonstrated that interleukin 1b (IL-1β) upregulated expression of monocyte chemoattractant protein 1 (MCP-1) in TMJSCs...
March 13, 2018: Bioscience Reports
Michihito Sasaki, Paulina D Anindita, Naoto Ito, Makoto Sugiyama, Michael Carr, Hideo Fukuhara, Toyoyuki Ose, Katsumi Maenaka, Ayato Takada, William W Hall, Yasuko Orba, Hirofumi Sawa
Rabies virus (RABV) is the causative agent of fatal neurological disease. Cellular attachment is the initial and essential step for viral infections. Although extensive studies have demonstrated that RABV utilizes various target cell molecules to mediate infection, no specific molecule has been identified as an attachment factor for RABV infection. Here we demonstrate that cellular heparan sulfate (HS) supports RABV adhesion and subsequent entry into target cells. Enzymatic removal of HS reduced the cellular susceptibility to RABV infection and heparin, a highly sulfated form of HS, blocked viral adhesion and infection...
February 26, 2018: Journal of Infectious Diseases
Takashi Komatsu, Fusanori Kunugita, Mahito Ozawa, Yoshihiro Satoh, Reisuke Yoshizawa, Shingen Owada, Youhei Sawa, Yoshihiro Morino, Motoyuki Nakamura
Background and methods There is little information concerning the influence of the heart rhythm on the vascular endothelial function in patients with non-valvular atrial fibrillation (AF) compared with studies concerning sinus rhythm (SR). The present study included paroxysmal (n=184) or chronic (n=53) AF patients without heart failure and control subjects with SR (n=79) matched for age, gender and the CHA2 DS2 -VASc score. Paroxysmal AF was defined as episodes that terminated spontaneously within 7 days, while chronic AF was defined as longstanding AF that was refractory to cardioversion for 12 months or longer...
March 9, 2018: Internal Medicine
Mariko Sawa, Akira Yabuki, Moeko Kohyama, Noriaki Miyoshi, Osamu Yamato
BACKGROUND: Immunocytochemistry (ICC) is utilized as an advanced technique in veterinary cytology. In tumor diagnosis, cytokeratin and vimentin are markers used to distinguish the origin of tumor cells. Standard enzyme-based ICC has limitations in clinical use; and therefore, more convenient and reliable methods are needed. OBJECTIVES: The purpose of this study was to develop a rapid multiple immunofluorescent (RMIF) detection method for dual cytokeratin and vimentin staining on cytology slides in dogs...
March 9, 2018: Veterinary Clinical Pathology
Dean F Wong, Hiroto Kuwabara, Andrew G Horti, Joshua M Roberts, Ayon Nandi, Nicola Casella, James Brasic, Elise M Weerts, Kelly Kitzmiller, Jenny A Phan, Lorena Gapasin, Akira Sawa, Heather Valentine, Gary Wand, Noble George, Michael McDonald, William Kem, Robert Freedman, Albert Gjedde
Background: The α7 nicotinic acetylcholine receptor (nAChR) increasingly has been implicated in normal brain physiology, as well as in neuropsychiatric disorders. The highly cortical distribution of α7-nAChR suggests a role in cognition. Methods: We expanded the first-in-human PET imaging of α7-nAChR with [18F]ASEM from five to 21 healthy non-smoking volunteers and added a feasibility study in six male patients with schizophrenia. Study aims included 1) confirmation of test-retest reproducibility of [18F]ASEM binding, 2) demonstration of specificity by competition with DMXB-A, an α7-nAChR partial agonist, 3) estimation of [18F]ASEM binding potentials and α7-nAChR density in vivo in humans, and 4) demonstrating the feasibility of studying α7-nAChR as a target for schizophrenia...
March 7, 2018: International Journal of Neuropsychopharmacology
Katsuo Sekiguchi, Tomokazu Ushitani, Kosuke Sawa
Landmark-based goal-searching tasks that were similar to those for pigeons (Ushitani & Jitsumori, 2011) were provided to human participants to investigate whether they could learn and use multiple sources of spatial information that redundantly indicate the position of a hidden target in both an open field (Experiment 1) and on a computer screen (Experiments 2 and 3). During the training in each experiment, participants learned to locate a target in 1 of 25 objects arranged in a 5 × 5 grid, using two differently colored, arrow-shaped (Experiments 1 and 2) or asymmetrically shaped (Experiment 3) landmarks placed adjacent to the goal and pointing to the goal location...
March 8, 2018: Journal of Comparative Psychology
Marta Kinga Lemieszek, Andrzej Stepulak, Katarzyna Sawa-Wejksza, Arkadiusz Czerwonka, Chrysanthy Ikonomidou, Wojciech Rzeski
Regardless of contemporary improvements in cancer treatment, the results of drug treatment are not always efficacious. Thus, the development of novel approaches that affect cancer cell-specific metabolic pathways are needed. Since much evidence has shown that tumor cell proliferation and motility are stimulated by glutamate via activation of its receptors, use of antagonists to these receptors may be the key to control cancer cell progression. Riluzole noncompetitive metabotropic glutamate receptor 1 (mGluR1) antagonist, commonly used to treat patients with amyotrophic lateral sclerosis (ALS), has shown some antineoplastic properties against melanoma, breast and prostate cancer...
February 28, 2018: Anti-cancer Agents in Medicinal Chemistry
Nagako Sougawa, Shigeru Miyagawa, Satsuki Fukushima, Ai Kawamura, Junya Yokoyama, Emiko Ito, Akima Harada, Kaori Okimoto, Noriko Mochizuki-Oda, Atsuhiro Saito, Yoshiki Sawa
Induced pluripotent stem cells (iPSCs) are promising candidate cells for cardiomyogenesis in the failing heart. However, teratoma/tumour formation originating from undifferentiated iPSCs contaminating the graft is a critical concern for clinical application. Here, we hypothesized that brentuximab vedotin, which targets CD30, induces apoptosis in tumourigenic cells, thus increasing the safety of iPSC therapy for heart failure. Flow cytometry analysis identified consistent expression of CD30 in undifferentiated human iPSCs...
February 27, 2018: Scientific Reports
Rupali Srivastava, Travis Faust, Adriana Ramos, Koko Ishizuka, Akira Sawa
Mitochondria play a crucial role in neuronal function, especially in energy production, the generation of reactive oxygen species, and calcium signaling. Multiple lines of evidence have suggested the possible involvement of mitochondrial deficits in major psychiatric disorders, such as schizophrenia and bipolar disorder. This review will outline the current understanding of the physiological role of mitochondria and their dysfunction under pathological conditions, particularly in psychiatric disorders. The current knowledge about mitochondrial deficits in these disorders is somewhat limited because of the lack of effective methods to dissect dynamic changes in functional deficits that are directly associated with psychiatric conditions...
January 17, 2018: Biological Psychiatry
Sotirios Posporelis, Jennifer M Coughlin, Anouk Marsman, Subechhya Pradhan, Teppei Tanaka, Hongxing Wang, Mark Varvaris, Rebecca Ward, Cecilia Higgs, Jamie A Edwards, Candice N Ford, Pearl K Kim, Ashley M Lloyd, Richard A E Edden, David J Schretlen, Nicola G Cascella, Peter B Barker, Akira Sawa
BACKGROUND: Converging evidence suggests that cerebral metabolic and cellular homeostasis is altered in patients with recent onset of schizophrenia. As a possible marker of metabolic changes that might link to altered neurotransmission, we used proton magnetic resonance spectroscopy to estimate brain temperature, and we evaluated its relationship to a relevant metabolite, glutamate, within this study population. METHODS: Using proton magnetic resonance spectroscopy at 7T, 20 patients with recent onset (≤24 months after first psychotic symptoms) of schizophrenia and 20 healthy control subjects were studied...
March 2018: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
Ryohei Matsuura, Shigeru Miyagawa, Junichi Kikuta, Masaru Ishii, Yoshiki Sawa
Recent molecular approaches have provided deeper insight on heart failure. However, real-time in vivo cellular dynamics have not been satisfactorily visualized. Here, we present a detailed protocol for in vivo cellular imaging for visualization of the rat heart using two-photon microscopy.
2018: Methods in Molecular Biology
Shoko Noda-Narita, Keiichi Sumida, Akinari Sekine, Junichi Hoshino, Koki Mise, Tatsuya Suwabe, Noriko Hayami, Masayuki Yamanouchi, Toshiharu Ueno, Hiroki Mizuno, Masahiro Kawada, Rikako Hiramatsu, Eiko Hasegawa, Naoki Sawa, Kenmei Takaichi, Kenichi Ohashi, Takeshi Fujii, Yoshifumi Ubara
Thrombocytopenia, anasarca, fever, reticulin fibrosis, organomegaly (TAFRO) syndrome is a unique clinicopathologic subtype of multicentric Castleman's disease that has recently been identified in Japan. However, little is known about its renal histological changes and the optimal treatment for TAFRO syndrome. An 80-year-old Japanese woman was admitted to our hospital for evaluation of severe anasarca and weight gain (10 kg in a month). She had polyneuropathy, monoclonal plasma cell proliferative disorder with positive kappa M-protein, a sclerotic bone lesion, elevation of vascular endothelial growth factor (VEGF), skin changes, and extravascular volume overload, which fulfilled the diagnostic criteria for POEMS (polyneuropathy, organomegaly, endocrinopathy, and monoclonal protein, skin changes) syndrome...
February 21, 2018: CEN Case Reports
Yuji Wada, Michihito Sasaki, Agus Setiyono, Ekowati Handharyani, Ibenu Rahmadani, Siswatiana Taha, Sri Adiani, Munira Latief, Zainal Abidin Kholilullah, Mawar Subangkit, Shintaro Kobayashi, Ichiro Nakamura, Takashi Kimura, Yasuko Orba, Hirofumi Sawa
Bats are an important natural reservoir of zoonotic viral pathogens. We previously isolated an alphaherpesvirus in fruit bats in Indonesia, and here establish the presence of viruses belonging to other taxa of the family Herpesviridae. We screened the same fruit bat population with pan-herpesvirus PCR and discovered 68 sequences of novel gammaherpesvirus, designated 'megabat gammaherpesvirus' (MgGHV). A phylogenetic analysis of approximately 3.4 kbp of continuous MgGHV sequences encompassing the glycoprotein B gene and DNA polymerase gene revealed that the MgGHV sequences are distinct from those of other reported gammaherpesviruses...
March 2018: Journal of Medical Microbiology
Masamichi Tanaka, Akira Nakagawa, Nobuya Nishi, Kiyoko Iijima, Ryuichi Sawa, Daisuke Takahashi, Kazunobu Toshima
Regio- and 1,2-cis-stereoselective chemical glycosylation of unprotected glycosyl acceptors has been in great demand for the efficient synthesis of natural glycosides. However, simultaneously regulating these selectivities has been a long-standing problem in synthetic organic chemistry. In nature, glycosyl transferases catalyze regioselective 1,2-cis-glycosylations via the SN i mechanism, yet no useful chemical glycosylations based on this mechanism have been developed. In this paper, we report a highly regio- and 1,2-cis-stereoselective SN i-type glycosylation of 1,2-anhydro donors and unprotected sugar acceptors using p-nitrophenylboronic acid (10e) as a catalyst in the presence of water under mild conditions...
February 19, 2018: Journal of the American Chemical Society
Maarten Ooms, Tetsuya Tsujikawa, Talakad G Lohith, Sanché N Mabins, Sami S Zoghbi, Akiko Sumitomo, Hanna Jaaro-Peled, Yasuyuki Kimura, Sanjay Telu, Victor W Pike, Toshifumi Tomoda, Robert B Innis, Akira Sawa, Masahiro Fujita
Although still a matter of controversy, disrupted in schizophrenia protein 1 (DISC1) was suggested as a potential inhibitor of phosphodiesterase 4 (PDE4). We used Disc1 locus impairment (LI) mice to investigate the interaction between PDE4 and DISC 1 in vivo and in vitro. [11C]( R)-Rolipram binding was measured by PET in LI ( n = 11) and C57BL/6 wild-type (WT, n = 9) mice. [11C]( R)-Rolipram total distribution volumes ( VT) were calculated and corrected for plasma-free fraction ( fP) measured in a separate group of LI ( n = 6) and WT ( n = 7) mice...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
Y Sawa, G Matsumiya, K Matsuda, E Tatsumi, T Abe, K Fukunaga, S Ichiba, A Kishida, K Kokubo, T Masuzawa, A Myoui, M Nishimura, T Nishimura, T Nishinaka, E Okamoto, S Tokunaga, T Tomo, T Tsukiya, Y Yagi, T Yamaoka
No abstract text is available yet for this article.
February 9, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
Kenji Suetsugu, Chie Shimaoka, Hirokazu Fukunaga, Shinichiro Sawa
To elucidate the taxonomy of the Lecanorchis nigricans Honda, 1931 species complex, the present study investigated the detailed morphology of three L. nigricans varieties in Japan. While L. nigricans var. patipetala Y.Sawa, 1980 and L. nigricans var. yakusimensis T.Hashim., 1990 have often been treated as synonyms of L. nigricans var. nigricans, the present study demonstrates that the three varieties are morphologically distinct. More specifically, L. nigricans var. nigricans only produces complete cleistogamous flowers and is distinct from the plants currently called "L...
2018: PhytoKeys
Satoshi Nishiwada, Shinji Nakamura, Tetsuya Tanaka, Yuki Kirihataya, Daiki Nezu, Nobuhiro Sawa, Naoki Fujita, Haruka Ikegami, Atsushi Yoshimura
INTRODUCTION: Entero-enteric fistulas are rare complications that occur in patients with inflammatory bowel disease and other intestinal diseases. In this report, we present an ileo-ileal fistula accompanied by severe malnutrition caused by strangulated ileus surgery while preserving the ischemic ileum in a very elderly patient. CASE PRESENTATION: A 90-year-old woman underwent emergency surgery without bowel resection for strangulated ileus in another hospital. Minor abdominal pain and slight fever persisted after surgery...
January 27, 2018: International Journal of Surgery Case Reports
Junichi Hoshino, Kengo Furuichi, Masayuki Yamanouchi, Koki Mise, Akinari Sekine, Masahiro Kawada, Keiichi Sumida, Rikako Hiramatsu, Eiko Hasegawa, Noriko Hayami, Tatsuya Suwabe, Naoki Sawa, Shigeko Hara, Takeshi Fujii, Kenichi Ohashi, Kiyoki Kitagawa, Tadashi Toyama, Miho Shimizu, Kenmei Takaichi, Yoshifumi Ubara, Takashi Wada
BACKGROUND AND OBJECTIVES: The impact of the newly proposed pathological classification by the Japan Renal Pathology Society (JRPS) on renal outcome is unclear. So we evaluated that impact and created a new pathological scoring to predict outcome using this classification. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: A multicenter cohort of 493 biopsy-proven Japanese patients with diabetic nephropathy (DN) were analyzed. The association between each pathological factor-Tervaert' and JRPS classifications-and renal outcome (dialysis initiation or 50% eGFR decline) was estimated by adjusted Cox regression...
2018: PloS One
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