531 results match your criteria ogasawara islands


Imaging of Oral SCC Cells by Raman Micro-Spectroscopy Technique.

Molecules 2021 Jun 15;26(12). Epub 2021 Jun 15.

Division of Dentistry and Oral Surgery, Fukui General Hospital, Egami, Fukui 910-8561, Japan.

We used Raman micro-spectroscopy technique to analyze the molecular changes associated with oral squamous cell carcinoma (SCC) cells in the form of frozen tissue. Previously, Raman micro-spectroscopy technique on human tissue was mainly based on spectral analysis, but we worked on imaging of molecular structure. In this study, we evaluated the distribution of four components at the cell level (about 10 μm) to describe the changes in protein and molecular structures of protein belonging to malignant tissue. Read More

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Detection and molecular characteristics of Pyelosomum cochlear (Digenea: Pronocephalidae) in the urinary bladder of the green sea turtle (Chelonia mydas) in the Northwest Pacific Ocean.

Infect Genet Evol 2021 Jun 8;93:104962. Epub 2021 Jun 8.

Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka 020-8550, Japan. Electronic address:

The genus Pyelosomum consists of parasitic flukes occurring primarily in marine turtles; Pyelosomum cochlear Looss 1899 is the only species of this genus that parasitizes the urinary bladder. In this study, we detected flukes in the urinary bladders of 20 of 88 green sea turtles (Chelonia mydas) harvested in the Ogasawara Islands, in the Northwest Pacific Ocean. We identified the flukes as P. Read More

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Detection and molecular characteristics of Rhytidodoides sp. (Digenea: Rhytidodidae) from the gall bladder of green sea turtles (Chelonia mydas) in the Ogasawara Islands, Japan.

Parasitol Int 2021 Aug 7;83:102377. Epub 2021 May 7.

Laboratory of Parasitology, Faculty of Veterinary medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari 794-8555, Japan.

Trematodes of the genus Rhytidodoides are parasitic in marine turtles. Of the already known species, Rhytidodoides similis Price, 1939, occurs especially in the gall bladder. In this study, we surveyed 73 green sea turtles (Chelonia mydas) in the Ogasawara Islands, Japan, and detected Rhytidodoides sp. Read More

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[Investigation of Preferences in Working Environment of Students for Maintaining Uniform Geographical Distribution of Radiological Technologists].

Nihon Hoshasen Gijutsu Gakkai Zasshi 2021 ;77(4):319-325

Faculty of Health Sciences, Hokkaido University.

Purpose: This study was designed to assess working environment preferences of students in the Department of Radiological Technology using conjoint analysis for establishing an efficient medical system.

Method: We carried a questionnaire survey on working environment preferences for 196 students in the Department of Radiological Technology in Japan. We defined eight characteristics for virtual medical facilities as follows: presence of colleagues who can be consulted, employment status, number of night shift per month, academic meeting participation, number of hospital beds, possession of nuclear medicine imaging systems and radiation therapy systems, location of medical facilities, and change rate in annual income. Read More

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Molecular signatures of long-distance oceanic dispersal and the colonization of Pacific islands in Lycium carolinianum.

Am J Bot 2021 04 2;108(4):694-710. Epub 2021 Apr 2.

Department of Biology, Amherst College, Amherst, Massachusetts, 01002, USA.

Premise: Long-distance dispersal has been important in explaining the present distributions of many plant species. Despite being infrequent, such dispersal events have considerable evolutionary consequences, because bottlenecks during colonization can result in reduced genetic diversity. We examined the phylogeographic history of Lycium carolinianum, a widespread taxon that ranges from southeastern North America to several Pacific islands, with intraspecific diversity in sexual and mating systems. Read More

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Two new deep-sea species of the genus Henricia (Asteroidea: Spinulosida: Echinasteridae) from Japanese waters.

Zootaxa 2021 Jan 6;4903(1):zootaxa.4903.1.5. Epub 2021 Jan 6.

Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. Department of Zoology, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba-shi, Ibaraki 305-0005, Japan..

Two new deep-sea Henricia species, Henricia margarethae n. sp. and Henricia fragilis n. Read More

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January 2021

Sensitivity of turtles to anticoagulant rodenticides: Risk assessment for green sea turtles (Chelonia mydas) in the Ogasawara Islands and comparison of warfarin sensitivity among turtle species.

Aquat Toxicol 2021 Apr 25;233:105792. Epub 2021 Feb 25.

Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, 060-0818, Japan. Electronic address:

Although anticoagulant rodenticides (ARs) are effectively used for the control of invasive rodents, nontarget species are also frequently exposed to ARs and secondary poisonings occur widely. However, little data is available on the effects of ARs, especially on marine organisms. To evaluate the effects of ARs on marine wildlife, we chose green sea turtles (Chelonia mydas), which are one of the most common marine organisms around the Ogasawara islands, as our primary study species. Read More

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The long-run heterogeneous effects of a cholera pandemic on stature: Evidence from industrializing Japan.

Econ Hum Biol 2021 05 6;41:100968. Epub 2021 Feb 6.

Department of Business Economics, School of Management, Tokyo University of Science, 1-11-2, Fujimi, Chiyoda-ku, Tokyo 102-0071, Japan. Electronic address:

The recent COVID-19 pandemic poses the general question on how infectious diseases can persistently affect human health. A growing body of literature has found a significant amount of evidence on the long-term adverse effects of infectious diseases, such as influenza, typhoid fever, and yellow fever. However, we must be careful about the fact that little is known about the long-term consequences of the acute diarrheal disease pandemic cholera - Vibrio cholerae bacillus - which still threatens the health of the population in many developing countries. Read More

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Polymethoxyflavone purified from reduces visceral fat in Japanese overweight individuals: a randomised, double-blind, placebo-controlled study.

Food Funct 2021 Mar;12(4):1603-1613

Fukuhara Clinic, Hokkaido 061-1351, Japan.

Visceral fat is a more important factor in obesity-associated disorders in Japanese individuals than in Caucasian individuals. The objective of this randomised, double-blind, placebo-controlled parallel group study, conducted in Japanese overweight adults, was to investigate the effects of polymethoxyflavone purified from Kaempferia parviflora on visceral fat. A total of 80 subjects (aged 20-64 years, 23. Read More

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Testing the Ability of Dogs to Detect Different Odor Concentrations of the Carolina Anole () in Japan.

Front Vet Sci 2020 30;7:590834. Epub 2020 Oct 30.

Department of Animal Science and Resources, College of Bioresource Sciences, Nihon University, Fujisawa, Japan.

The Carolina anole () is regarded as a problem in the Ogasawara Islands. The decision to use eradication measures depends on the limit of detection at low densities. We tested the ability of two dogs to discriminate the odor of anole to assess the possibility of using dogs to detect anoles at low densities. Read More

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October 2020

Re-Invasion of H5N8 High Pathogenicity Avian Influenza Virus Clade 2.3.4.4b in Hokkaido, Japan, 2020.

Viruses 2020 12 14;12(12). Epub 2020 Dec 14.

Laboratory of Microbiology, Department of Disease Control, Faculty of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Hokkaido, Japan.

Global dispersion of high pathogenicity avian influenza (HPAI), especially that caused by H5 clade 2.3.4. Read More

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December 2020

First record of Bouvieraxius keiensis Sakai, 1992 and Manaxius aurantiaca n. sp. (Decapoda: Axiidea) from the waters around the Ogasawara Islands, Japan.

Authors:
Tomoyuki Komai

Zootaxa 2020 Nov 3;4869(3):zootaxa.4869.3.4. Epub 2020 Nov 3.

Natural History Museum and Institute, Chiba, 955-2 Aoba-cho, Chuo-ku, Chiba, 260-8682 Japan..

Two species of axiid shrimp are reported from sublittoral to upper bathyal waters around the Ogasawara Islands, Japan. The first, Bouvieraxius keiensis Sakai, 1992, is recorded from Japanese waters for the first time, although it is known widely from the southwestern Pacific to western Indian Ocean. Taxonomic problems of this taxon are pointed out. Read More

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November 2020

Effect of Statin Administration After Onset of Acute Ischemic Stroke With Large Vessel Occlusion: Insights From RESCUE-Japan Registry 2.

J Am Heart Assoc 2020 12 23;9(23):e017472. Epub 2020 Nov 23.

Department of Clinical Epidemiology Hyogo College of Medicine Nishinomiya Japan.

Background Statins have been associated with reduced recurrence and better functional outcomes in patients with acute ischemic stroke. However, the effect of statins in patients with acute large vessel occlusion (LVO) is not well scrutinized. Methods and Results RESCUE (Recovery by Endovascular Salvage for Cerebral Ultra-Acute Embolism)-Japan Registry 2, a physician-initiated registry, enrolled 2420 consecutive patients with acute LVO who were admitted to 46 centers across Japan within 24 hours of onset. Read More

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December 2020

Increased Oxidative Stress Underlies Abnormal Pain Threshold in a Normoglycemic Japanese Population.

Int J Mol Sci 2020 Nov 5;21(21). Epub 2020 Nov 5.

Department of Social Medicine, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori 036-8562, Japan.

Normal-high HbA1c levels are a risk factor for attenuated pain sensation in normoglycemic subjects. It is unclear, however, what mechanisms underlie the pathogenesis of attenuated pain sensation in such a population. We, therefore, explored the relationship between oxidative stress (OS) and pain sensation in a rural Japanese population. Read More

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November 2020

DDBJ update: streamlining submission and access of human data.

Nucleic Acids Res 2021 01;49(D1):D71-D75

Bioinformation and DDBJ Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan.

The Bioinformation and DDBJ Center (DDBJ Center, https://www.ddbj.nig. Read More

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January 2021

Lipopolysaccharide-binding protein is a distinctive biomarker of abnormal pain threshold in the general Japanese population.

BMJ Open Diabetes Res Care 2020 10;8(1)

Department of Social Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan.

Introduction: Small fiber neuropathy (SFN) is an early manifestation in diabetic polyneuropathy (DPN); however, the mechanisms are not fully understood. In diabetes, SFN is presumed to be common in individuals with overt DPN, enhancing activation of polyol pathway, oxidative stress, advanced glycation end products (AGEs), and inflammation. We explored the relationship between clinicohematological factors related to DPN and pain sensation in the Japanese population. Read More

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October 2020

A new species of pagurid hermit crab assigned to the genus Kumepagurus Komai amp; Osawa, 2012 (Decapoda: Anomura: Paguroidea) from the Kaikata Seamount, Izu-Ogasawara Arc, Japan.

Authors:
Tomoyuki Komai

Zootaxa 2020 Sep 30;4858(2):zootaxa.4858.2.5. Epub 2020 Sep 30.

Natural History Museum and Institute, Chiba, 955-2 Aoba-cho, Chuo-ku, Chiba, 260-8682 Japan..

A new pagurid hermit crab species is assigned to the genus Kumepagurus Komai Osawa, 2012, previously represented only by the type species, K. cavernicolus Komai Osawa, 2012, known only from a marine cave on Ryukyu Islands, northwestern Pacific. The assignment is made because of the lack of an accessory tooth on the maxilliped 3 ischium, the operculiform right chela, the presence of two distal corneous claws on the left chela fixed finger, the simple pereopods 4 and the development and structure of the male sexual tubes on both coxae of pereopods 5, all characteristic to the type species of the genus. Read More

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September 2020

Occurrence of Cerebrovascular Diseases Decreased after the Great East Japan Earthquake and Tsunami of 2011.

Cerebrovasc Dis Extra 2020 8;10(3):105-115. Epub 2020 Oct 8.

Department of Hygiene and Preventive Medicine, Iwate Medical University, Yahaba, Japan.

Background: A temporary increase in the occurrence of cerebrovascular diseases (CVDs) after the Great East Japan Earthquake and Tsunami of 2011 was reported; however, no studies have been conducted to investigate long-term effects. We assessed the long-term impact of the disaster on the incidence of CVDs.

Methods: Incidence data for CVDs from 2008 to 2017 were acquired from the population-based Stroke Registry with an inventory survey of Iwate Prefecture, Japan. Read More

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January 2021

Rapidly Progressing Aseptic Abscesses in a Patient with Ulcerative Colitis.

Intern Med 2021 Mar 30;60(5):725-730. Epub 2020 Sep 30.

Department of Gastroenterology, Aichi Medical University School of Medicine, Japan.

Aseptic abscesses (AAs) are extraintestinal manifestations of inflammatory bowel disease (IBD). IBD-associated AAs are rare in Japan. We treated a 45-year-old man with ulcerative colitis (UC)-associated AAs. Read More

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Host-parasite relationships between seabirds and the haemadipsid leech (Annelida: Clitellata) inhabiting oceanic islands in the Pacific Ocean.

Parasitology 2020 12 18;147(14):1765-1773. Epub 2020 Sep 18.

Yamashina Institute for Ornithology, Abiko, Chiba270-1145, Japan.

The duognathous haemadipsid leeches of the genus Chtonobdella show a trans-oceanic distribution throughout the Indo-Pacific region. Although passive long-distance dispersal (LDD) of Chtonobdella leeches by birds has been suggested, little is known about the host-parasite relationships between avian hosts and Chtonobdella leeches. In the current study, we investigated Chtonobdella leech infestations of the eyes and other mucus membranes of migratory procellariiform seabirds, Pterodroma hypoleuca and Oceanodroma tristrami, captured at six locations in the Bonin Islands, Honshu and Okinawa Island, Japan. Read More

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December 2020

Cost-Effectiveness of a Continuous Glucose Monitoring Mobile App for Patients With Type 2 Diabetes Mellitus: Analysis Simulation.

J Med Internet Res 2020 09 17;22(9):e16053. Epub 2020 Sep 17.

Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan.

Background: Apps for real-time continuous glucose monitoring (CGM) on smartphones and other devices linked to CGM systems have recently been developed, and such CGM apps are also coming into use in Japan. In comparison with conventional retrospective CGM, the use of CGM apps improves patients' own blood glucose control, which is expected to help slow the progression of type 2 diabetes mellitus (DM) and prevent complications, but the effect of their introduction on medical costs remains unknown.

Objective: Our objective in this study was to perform an economic appraisal of CGM apps from the viewpoint of assessing public medical costs associated with type 2 DM, using the probability of developing type 2 DM-associated complications, and data on medical costs and utility value to carry out a medical cost simulation using a Markov model in order to ascertain the cost-effectiveness of the apps. Read More

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September 2020

Prevalence and antimicrobial-resistance profiles of Salmonella spp. isolated from green anoles (Anolis carolinensis) collected on the Haha-jima of the Ogasawara archipelago, Japan.

J Vet Med Sci 2020 Oct 16;82(10):1558-1561. Epub 2020 Sep 16.

College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan.

We investigated the prevalence of Salmonellaenterica and its antimicrobial resistance from 79 green anoles, the invasive alien species inhabits Haha-jima of the Ogasawara archipelago. Samples were collected during the period between 2009 and 2010. The resistance of S. Read More

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October 2020

Clinical trial of carotid artery stenting using dual-layer CASPER stent for carotid endarterectomy in patients at high and normal risk in the Japanese population.

J Neurointerv Surg 2021 Jun 15;13(6):524-529. Epub 2020 Sep 15.

Department of Neurosurgery, Iwate Medical University, Morioka, Japan.

Background: The dual-layer nitinol CASPER stent was designed to prevent plaque prolapse into its strut and periprocedural stroke.

Objective: To conduct a clinical trial for government approval of the device in patients at either high or normal risk for carotid endarterectomy (CEA).

Methods: Eligible patients had ≥50% symptomatic stenosis or ≥80% asymptomatic stenosis according to the North American Symptomatic Carotid Endarterectomy Trial methods (peak systolic velocity 130 and 230 cm/s on ultrasonography, respectively). Read More

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Investigating the effects of nest shading on the green turtle (Chelonia mydas) hatchling phenotype in the Ogasawara islands using a field-based split clutch experiment.

J Exp Zool A Ecol Integr Physiol 2020 11 7;333(9):629-636. Epub 2020 Sep 7.

Laboratory of Animal Behavior and Environmental Science, Department of Agriculture, School of Agriculture, Meiji University, Kanagawa, Japan.

The Ogasawara Islands are an important rookery for the green turtle (Chelonia mydas) in the North Pacific. Green turtles possess temperature-dependent sex determination, and warmer incubation temperatures produce more females than males. Therefore, conservation practices such as nest shading may be required for this population to mitigate the effect of global warming on their sex ratio. Read More

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November 2020

Factors that influence occupational physicians' decision to issue an employer warning in Japan.

J Occup Health 2020 Jan;62(1):e12147

Department of Environmental Epidemiology, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Kitakyushu, Japan.

Objectives: To elucidate the factors that influence occupational physicians' decision to issue an employer warning.

Methods: The interview was conducted with 10 Japan Society for Occupational Health certified occupational physicians (COPs) and certified senior occupational physicians (CSOPs) to create nine fictive scenarios in which an occupational physician may need to consider issuing a warning. Sixteen CSOPs assessed the seriousness of the problem in each of nine scenarios where they may need to consider issuing an employer warning. Read More

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January 2020

Changing Emotions About Fukushima Related to the Fukushima Nuclear Power Station Accident-How Rumors Determined People's Attitudes: Social Media Sentiment Analysis.

J Med Internet Res 2020 09 2;22(9):e18662. Epub 2020 Sep 2.

Quantum Medical Science Directorate, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan.

Background: Public interest in radiation rose after the Tokyo Electric Power Company (TEPCO) Fukushima Daiichi Nuclear Power Station accident was caused by an earthquake off the Pacific coast of Tohoku on March 11, 2011. Various reports on the accident and radiation were spread by the mass media, and people displayed their emotional reactions, which were thought to be related to information about the Fukushima accident, on Twitter, Facebook, and other social networking sites. Fears about radiation were spread as well, leading to harmful rumors about Fukushima and the refusal to test children for radiation. Read More

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September 2020

Health-related quality of life in Japanese patients with bladder cancer measured by a newly developed Japanese version of the Bladder Cancer Index.

Int J Clin Oncol 2020 Dec 24;25(12):2090-2098. Epub 2020 Aug 24.

Department of Urology, Hokkaido University Graduate School of Medicine, Sapporo, Japan.

Introduction: We validated a Japanese version of the Bladder Cancer Index (BCI) as a tool for measuring health-related quality of life (HRQOL) in bladder cancer patients treated with various surgical procedures.

Methods: The reliability and validity of the Japanese BCI were examined in 397 Japanese patients with bladder cancer via cross-sectional analysis. The patients simultaneously completed the Short Form (SF)-12, EQ-5D, and the Functional Assessment of Cancer Therapy-General and Bladder (FACT-G and FACT-BL). Read More

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December 2020

[Investigation of Research Trends in Radiological Technology Using Text Mining].

Nihon Hoshasen Gijutsu Gakkai Zasshi 2020 ;76(8):787-794

Faculty of Health Sciences, Hokkaido University.

The purpose of this study was to investigate the trends of researches regarding radiological technology. We collected research papers published from 2007 to 2017 from Japanese Society of Radiological Technology (JSRT). After preprocessing, we performed morphological analysis using terminology from Japan Radiological Society, Japan Society of Medical Physics, and JSRT to extract technical terms. Read More

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September 2020

Outstanding performance of an invasive alien tree relative to native tree species and implications for management of insular primary forests.

PeerJ 2020 23;8:e9573. Epub 2020 Jul 23.

Faculty of Arts and Sciences, Komazawa University, Tokyo, Japan.

Invasive alien tree species can exert severe impacts, especially in insular biodiversity hotspots, but have been inadequately studied. Knowledge of the life history and population trends of an invasive alien tree species is essential for appropriate ecosystem management. The invasive tree has overwhelmed native trees on Haha-jima Island in the Ogasawara Islands, Japan. Read More

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