Kojin Hospital

Moriyama, Japan

Kojin Hospital

Moriyama, Japan
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Nakayama S.,Nagoya University | Teramoto H.,Kojin Hospital
Yakugaku Zasshi | Year: 2016

The umami taste amino acid, glutamate acts as a signaling molecule in multiple cellular systems in the body, including the brain and gastrointestinal tract. Therefore, glutamate may affect appetite by modulating gastrointestinal motility as well as through taste perception. In this study, we examined the effect of glutamate on gastric emptying and duodenal motility, by using rapid magnetic resonance imaging (MRI). Ten healthy male volunteers participated in the measurements. Abdominal coronal MR images were successively acquired after ingestion of a liquid meal with and without monosodium L-glutamate (MSG). Image analysis was performed with a homemade segment software, in which respiratory motions were cancelled automatically by minimizing an energy function, thereby allowing participants breathe freely during MRI measurements. In two out of 10 participants, gastric emptying slowed down, while in the remaining eight participants, gastric residual volume decreased to 84% without MSG, and to 73% with MSG after 60 min. The inclusion of MSG enhanced duodenal motility, judging from changes in, 1) the magnitude of the duodenal area, 2) the center of gravity, and 3) the mean velocity of the wall motions. The third parameter most significantly indicated the excitatory effect of MSG on duodenum motility (3-7 fold increase). In conclusion, the present observations of rapid MRI indicate that MSG accelerates gastric emptying by facilitating duodenal motility, at least in healthy subjects with positive responses to MSG. This suggests the possible use of MSG as a prokinetic nutrient for improving the quality of life in hospitalized patients after a clinical assessment. © 2016 The Pharmaceutical Society of Japan.

Ikeda M.,Aichi University | Okahisa Y.,Okayama University of Science | Aleksic B.,Nagoya University | Won M.,Japanese Genetic Initiative for Drug Abuse JGIDA | And 20 more authors.
Neuropsychopharmacology | Year: 2013

Methamphetamine (METH) use can provoke psychotic reactions requiring immediate treatment, namely METH-induced psychosis. Although the distinction between METH-induced and primary psychosis is important for understanding their clinical courses, we do not have clear diagnostic procedure by their symptoms. Not only are there similarities between the clinical features of METH-induced psychosis and schizophrenia (SCZ), but there is also epidemiological evidence of a shared genetic risk between 'METH-related' disorders and SCZ, which makes the differentiation of these two conditions difficult. In this study, we conducted a genome-wide association study (GWAS) targeting METH-dependent patients. The METH sample group, used in the METH-dependence GWAS, included 236 METH-dependent patients and 864 healthy controls. We also included a 'within-case' comparison between 194 METH-induced psychosis patients and 42 METH-dependent patients without psychosis in a METH-induced psychosis GWAS. To investigate the shared genetic components between METH dependence, METH-induced psychosis, and SCZ, data from our previous SCZ GWAS (total N=1108) were re-analyzed. In the SNP-based analysis, none of the SNPs showed genome-wide significance in either data set. By performing a polygenic component analysis, however, we found that a large number of 'risk' alleles for METH-induced psychosis are over-represented in individuals with SCZ (P best =0.0090). Conversely, we did not detect enrichment either between METH dependence and METH-induced psychosis or between METH dependence and SCZ. The results support previous epidemiological and neurobiological evidence for a relationship between METH-induced psychosis and SCZ. These also suggest that the overlap between genes scored as positive in these data sets can have higher probability as susceptibility genes for psychosis.

Nagahashi M.,Virginia Commonwealth University | Nagahashi M.,Niigata University | Yamada A.,Virginia Commonwealth University | Miyazaki H.,Kojin Hospital | And 14 more authors.
Journal of Mammary Gland Biology and Neoplasia | Year: 2016

The tumor microenvironment is a determining factor for cancer biology and progression. Sphingosine-1-phosphate (S1P), produced by sphingosine kinases (SphKs), is a bioactive lipid mediator that regulates processes important for cancer progression. Despite its critical roles, the levels of S1P in interstitial fluid (IF), an important component of the tumor microenvironment, have never previously been measured due to a lack of efficient methods for collecting and quantifying IF. The purpose of this study is to clarify the levels of S1P in the IF from murine mammary glands and its tumors utilizing our novel methods. We developed an improved centrifugation method to collect IF. Sphingolipids in IF, blood, and tissue samples were measured by mass spectrometry. In mice with a deletion of SphK1, but not SphK2, levels of S1P in IF from the mammary glands were greatly attenuated. Levels of S1P in IF from mammary tumors were reduced when tumor growth was suppressed by oral administration of FTY720/fingolimod. Importantly, sphingosine, dihydro-sphingosine, and S1P levels, but not dihydro-S1P, were significantly higher in human breast tumor tissue IF than in the normal breast tissue IF. To our knowledge, this is the first reported S1P IF measurement in murine normal mammary glands and mammary tumors, as well as in human patients with breast cancer. S1P tumor IF measurement illuminates new aspects of the role of S1P in the tumor microenvironment. © 2016 Springer Science+Business Media New York

Teramoto H.,Kojin Hospital | Shimizu T.,RTech Corporation | Yogo H.,Kojin Hospital | Nishimiya Y.,Kojin Hospital | And 3 more authors.
Experimental Physiology | Year: 2012

Gastric emptying is achieved by co-operation between gastric and duodenal motor activity. Therefore, evaluation of gastric emptying and its associated mechanisms would benefit clinical therapy as well as medical research. Healthy volunteers underwent rapid magnetic resonance imaging (MRI) of the abdomen along the coronal plane after ingestion of a liquid meal. The gastric fundal and duodenal areas were quantified semi-automatically by self-developed segment software. The average gastric fundal area determined by the serosal end in 40 sequential images was reduced to ~81% 30 min after and to ~70% 60 min after ingestion of a liquid meal. The average duodenal area also decreased to ~86% after 30 min and to 83% after 60 min. In contrast, changes in the centre of gravity increased to about fivefold after 30 min and to about threefold after 60 min. The mean velocity of the duodenal wall mimicked changes in the centre of gravity. The application of metoclopramide, a dopamine D2 receptor antagonist, accelerated gastric emptying, presumably due to facilitated duodenal activity even immediately after liquid meal ingestion. The ingestion of water caused fast gastric emptying in 30 min, accompanied by high duodenal motility, but it ceased after 60 min, presumably reflecting complete gastric emptying. A rapid MRI scan visualized the association between gastric emptying and duodenal motility that could be modified by calories and dopaminergic neurotransmission. Changes in the centre of gravity and mean velocity of the duodenal wall appear to quantify the motility obtained from cine MRI accurately. © 2012 The Authors. Experimental Physiology © 2012 The Physiological Society.

Teramoto H.,Kojin Hospital | Morita Y.,Kojin Hospital | Shimomura R.,Red Cross | Kamahora T.,Tottori University | Makino M.,National Sanatorium Oku Komyo En
Journal of Medical Virology | Year: 2010

Oku-Komyo-En is one of the national leprosy sanatoria, located on a small island in Setouchi city, Okayama prefecture of Japan since 1938. Since autopsies were carried out routinely on almost all patients who had died in the sanatorium up to 1980, approximately 1,000 formalin-fixed autopsy tissue samples were available for analysis. When these samples were reviewed, the pathological data indicated a sharp rise in the death rate caused by cirrhosis of the liver and hepatocellular carcinoma (HCC) since 1960 and 1970, respectively. Hepatitis C virus (HCV) infection is a common cause of HCC in Japan. The presence of HCV RNA was demonstrated in paraffin sections prepared from the autopsied liver tissue fixed in formalin for a prolonged period of time, by employing nested RT-PCR using type-specific primers. The data showed that HCV RNA was detectable in samples of the liver archived as early as 1940, representing the liver tissues kept in formalin for up to 67 years. HCV genotypes 1b and 2a were found by RT-PCR at 85.7% and 14.3%, respectively, in patients with leprosy. © 2010 Wiley-Liss, Inc.

Takeuchi A.,Tokyo Medical and Dental University | Matsushima E.,Tokyo Medical and Dental University | Kato M.,Keio University | Konishi M.,Keio University | And 3 more authors.
Journal of Diabetes Investigation | Year: 2012

Aims/Introduction: It has been suggested that type 2 diabetes is associated with cognitive impairment. We investigated the neuropsychological profile of inpatients with poorly controlled type 2 diabetes and assessed the effects of clinical factors on neuropsychological functions. Materials and Methods: Forty-two patients with type 2 diabetes and 32 non diabetic control subjects were matched for age, sex ratio, and level of education. Attention & working memory, processing speed, verbal memory, visuospatial memory, visuoconstruction, and executive function were tested. Information about physical function, alcohol use, hypertension, dyslipidemia, and myocardial infarction was retrieved from personal interviews and medical records. Results: Diabetic patients demonstrated mild cognitive deterioration in attention & working memory, processing speed, verbal memory, and executive function. In particular, neuropsychological decline became prominent when tasks related with speed and verbal stimuli became unstructured and complex. Age was significantly associated with the majority of neuropsychological tests, whereas tasks dealing with working memory and executive function were associated with age only in the diabetic group. Duration of diabetes was associated with Backward Digit Span. Conclusions: Accelerated aging had a major influence on cognitive decline in the diabetic group, whereas diminished performance in working memory and executive function might have been more related to diabetes-related cognitive impairment. © 2011 Asian Association for the Study of Diabetes and Blackwell Publishing Asia Pty Ltd.

Vaque J.P.,U.S. National Institutes of Health | Dorsam R.T.,U.S. Food and Drug Administration | Feng X.,U.S. National Institutes of Health | Feng X.,University of Sichuan | And 8 more authors.
Molecular Cell | Year: 2013

Activating mutations in GNAQ and GNA11, encoding members of the Gαq family of G protein α subunits, are the driver oncogenes in uveal melanoma, and mutations in Gq-linked G protein-coupled receptors have been identified recently in numerous human malignancies. How Gαq and its coupled receptors transduce mitogenic signals is still unclear because of the complexity of signaling events perturbed upon Gq activation. Using a synthetic-biology approach and a genome-wide RNAi screen, we found that a highly conserved guanine nucleotide exchange factor, Trio, is essential for activating Rho- and Rac-regulated signaling pathways acting on JNK and p38, and thereby transducing proliferative signals from Gαq to the nucleus independently of phospholipase C-β. Indeed, whereas many biological responses elicited by Gq depend on the transient activation of second-messenger systems, Gq utilizes a hard-wired protein-protein-interaction-based signaling circuitry to achieve the sustained stimulation of proliferative pathways, thereby controlling normal and aberrant cell growth. © 2013 Elsevier Inc.

Hirokawa M.,Kuma Hospital | Sugitani I.,Nippon Medical School | Kakudo K.,Nara University | Sakamoto A.,Red Cross | And 12 more authors.
Endocrine Journal | Year: 2016

The aim of this study was to clarify the histopathological features of anaplastic thyroid carcinoma in patients who achieved long-term survival. We reviewed 88 anaplastic thyroid carcinoma cases in which the patient survived less than 3 months (short-term survival), and 68 anaplastic thyroid carcinoma cases in which the patient survived more than one year (long-term survival) from the database of the Anaplastic Thyroid Carcinoma Research Consortium of Japan. We examined these cases both histologically and immunohistochemically. Six (6.8%) short-term survival cases and 27 (39.7%) long-term survival cases were considered not to be anaplastic thyroid carcinoma after central review. Of these, 12 were revised to papillary carcinoma with squamous cell carcinoma. In cases without chemotherapy, long-term survival was significantly more common if there was a pre-existing tumor, epithelial growth, or lymphocytic infiltration, and short-term survival was more common if neutrophilic infiltration was present. In cases with chemotherapy, long-term survival was significantly more common if epithelial growth or a squamous cell carcinoma component was present, whereas short-term survival was more common in cases with rhabdoid cells. Immunohistochemical results were not related to survival. Some long-term survival cases showed histological findings other than those typically associated with anaplastic thyroid carcinoma. The presence of a pre-existing tumor, epithelial growth, a squamous cell carcinoma component, no neutrophilic infiltration and lymphocytic infiltration may therefore be favorable prognostic factors in anaplastic thyroid carcinoma. © The Japan Endocrine Society.

Teramoto H.,Kojin Hospital | Kamahora T.,Tottori University | Makino M.,National Sanatorium Oku Komyo En
Journal of Clinical Microbiology | Year: 2011

The hepatitis C virus (HCV) outbreak that occurred between 1940 and 1999 in a closed leprosy sanatorium located on a small island in Japan was analyzed. The analysis of 318 nucleotides in the NS5B region of HCV allowed us to establish the existence of at least three different HCV strains in this sanatorium. Copyright © 2011, American Society for Microbiology. All Rights Reserved.

PubMed | Kojin Hospital
Type: Journal Article | Journal: Journal of clinical microbiology | Year: 2011

The hepatitis C virus (HCV) outbreak that occurred between 1940 and 1999 in a closed leprosy sanatorium located on a small island in Japan was analyzed. The analysis of 318 nucleotides in the NS5B region of HCV allowed us to establish the existence of at least three different HCV strains in this sanatorium.

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