Author Iwamuro, Masaya| Okada, Hiroyuki| Harada, Keita| Kanzaki, Hiromitsu| Hori, Keisuke| Kita, Masahide| Kawano, Seiji| Kawahara, Yoshiro| Tanaka, Takehiro| Yamamoto, Kazuhide|
Published Date 2016-12-01
Publication Title Journal of Okayama Medical Association
Volume volume128
Issue issue3
Content Type Journal Article
JaLCDOI 10.18926/AMO/53520
FullText URL 69_3_137.pdf
Author Seki, Hiroyuki| Ikeda, Fusao| Nanba, Shintaro| Moritou, Yuki| Takeuchi, Yasuto| Yasunaka, Tetsuya| Onishi, Hideki| Miyake, Yasuhiro| Takaki, Akinobu| Nouso, Kazuhiro| Iwasaki, Yoshiaki| Nakamura, Minoru| Yamamoto, Kazuhide|
Abstract A predictive marker of the rapid progression to hepatic failure is desired for patients with asymptomatic primary biliary cirrhosis (aPBC). We performed a systematic cohort analysis of 101 patients diagnosed as having aPBC and the rapid progression to liver failure in some, by focusing on cholestasis. Cholestasis was assessed by aberrant keratin7 (K-7) expressions in the patientsʼ hepatocytes. Intralobular expressions of K-7 were found in 9 of the 101 patients. The grades of K-7 expression were significantly associated with the levels of alanine aminotransferase, alkaline phosphatase, and total bilirubin at the time of diagnosis, but not with bile duct loss or cholestasis. Stepwise logistic regression analysis revealed that high grades of K-7 expression correlated positively with high levels of total bilirubin. During the follow-up period, 8 patients developed jaundice, and the mean period until the development of jaundice was 5.2 years. The proportional hazards models for the risk of developing jaundice identified a high grade of aberrant K-7 expression in hepatocytes as the only significant risk factor. Aberrant K-7 expression in hepatocytes can be used as an additional marker to predict rapid progression to liver failure in patients with aPBC at the time of diagnosis.
Keywords primary biliary cirrhosis keratin 7 hepatic failure
Amo Type Original Article
Published Date 2015-06
Publication Title Acta Medica Okayama
Volume volume69
Issue issue3
Publisher Okayama University Medical School
Start Page 137
End Page 144
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2015 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 26101189
Web of Sience KeyUT 000356903000002
JaLCDOI 10.18926/AMO/53120
FullText URL 69_1_37.pdf
Author Iwamuro, Masaya| Okada, Hiroyuki| Takata, Katsuyoshi| Kawai, Yoshinari| Kawano, Seiji| Nasu, Junichiro| Kawahara, Yoshiro| Tanaka, Takehiro| Yoshino, Tadashi| Yamamoto, Kazuhide|
Abstract The sensitivity and specificity of magnified endoscopic features for differentiating follicular lymphoma from other diseases with duodenal whitish lesions have never been investigated. Here we compared the magnified endoscopic features of duodenal follicular lymphoma with those of other whitish lesions. We retrospectively reviewed the cases of patients with follicular lymphoma (n=9), lymphangiectasia (n=7), adenoma (n=10), duodenitis (n=4), erosion (n=1), lymphangioma (n=1), and hyperplastic polyp (n=1). The magnified features of the nine follicular lymphomas included enlarged villi (n=8), dilated microvessels (n=5), and opaque white spots of various sizes (n=9). The lymphangiectasias showed enlarged villi, dilated microvessels, and white spots, but the sizes of the white spots were relatively homogeneous and their margin was clear. Observation of the adenoma and duodenitis revealed only whitish villi. Although the lymphangioma was indistinguishable from the follicular lymphomas by magnified features, it was easily diagnosed based on the macroscopic morphology. In conclusion, magnified endoscopic features, in combination with macroscopic features, are useful for differentiating follicular lymphomas from other duodenal diseases presenting whitish lesions.
Keywords duodenal neoplasm follicular lymphoma gastrointestinal lymphoma magnifying endoscopy
Amo Type Original Article
Published Date 2015-02
Publication Title Acta Medica Okayama
Volume volume69
Issue issue1
Publisher Okayama University Medical School
Start Page 37
End Page 44
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2015 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 25703169
Web of Sience KeyUT 000349740300004
JaLCDOI 10.18926/AMO/53026
FullText URL 68_6_369.pdf
Author Iwamuro, Masaya| Miyashima, Yuichi| Yoshioka, Takahiro| Murata, Toshihiro| Miyabe, Yoshio| Kawai, Yoshinari| Urata, Haruo| Shiraha, Hidenori| Okada, Hiroyuki| Yamamoto, Kazuhide|
Abstract A 67-year-old Japanese man underwent enterotomy because of enterolith ileus. Component analysis by infrared spectroscopy revealed that the enterolith was composed of a high concentration of deoxycholic acid. We further analyzed and compared the ultrastructure of the enterolith and a commercially available powdered form of deoxycholic acid by means of scanning electron microscopy and energy dispersive X-ray spectroscopy. Energy dispersive X-ray spectroscopy analysis revealed that the ratios of carbon and oxygen in the enterolith were equal to those in the deoxycholic acid powder. Scanning electron microscopy analysis showed rectangular prism-shaped particles on the surface of the enterolith. This structure was similar to that of the deoxycholic acid powder. The surgically removed enterolith had a twisted and coiled appearance. Possible mechanisms underlying the formation of this unique form are discussed.
Keywords enterolith deoxycholic acid scanning electron microscopy infrared spectroscopy energy dispersive X-ray spectroscopy
Amo Type Case Report
Published Date 2014-12
Publication Title Acta Medica Okayama
Volume volume68
Issue issue6
Publisher Okayama University Medical School
Start Page 369
End Page 374
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2014 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 25519031
Web of Sience KeyUT 000346882200007
JaLCDOI 10.18926/AMO/52898
FullText URL 68_5_291.pdf
Author Tsuzaki, Ryuichiro| Takaki, Akinobu| Yagi, Takahito| Ikeda, Fusao| Koike, Kazuko| Iwasaki, Yoshiaki| Shiraha, Hidenori| Miyake, Yasuhiro| Sadamori, Hiroshi| Shinoura, Susumu| Umeda, Yuzo| Yoshida, Ryuichi| Nobuoka, Daisuke| Utsumi, Masashi| Nakayama, Eiichi| Fujiwara, Toshiyoshi| Yamamoto, Kazuhide|
Abstract It is not known how the immune system targets hepatitis C virus (HCV)-infected HLA-mismatched hepatocytes under immune-suppressed conditions after orthotopic liver transplantation (OLT). In addition, the relationship between the HCV-specific immune response and IL28B variants as predictors of HCV clearance has not been well-characterized. We determined the IL28B polymorphisms for 57 post-OLT HCV carriers, and we assessed the HCV-specific immune responses by measuring the peripheral blood mononuclear cell-derived HCV-specific interferon-gamma (IFN-γ) response using an enzyme-linked immunospot assay. At 1-3 years after OLT, patients with no active hepatitis showed higher total spots on the immunospot assay. At>3 years after OLT, patients with resolved HCV showed higher levels of core, NS3, NS5A, and total spots compared to the chronic hepatitis patients. The IL28B major genotype in the donors correlated with higher spot counts for NS5A and NS5B proteins at 1-3 years after OLT. In the post-OLT setting, the HCV-specific immune response could be strongly induced in patients with no active hepatitis with an IL28B major donor or sustained virological response. Strong immune responses in the patients with no active hepatitis could only be maintained for 3 years and diminished later. It may be beneficial to administer IFN treatment starting 3 years after OLT, to induce the maximum immunological effect.
Keywords interferon gamma ELISPOT assay single nucleotide polymorphisms dendritic cell CD4 T cell
Amo Type Original Article
Published Date 2014-10
Publication Title Acta Medica Okayama
Volume volume68
Issue issue5
Publisher Okayama University Medical School
Start Page 291
End Page 302
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2014 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 25338486
Web of Sience KeyUT 000343269300006
Related Url http://ousar.lib.okayama-u.ac.jp/metadata/53129
JaLCDOI 10.18926/AMO/52894
FullText URL 68_5_263.pdf
Author Namba, Shihoko| Miyake, Kayoko| Ikeda, Fusao| Hazama, Tomoko| Hitobe, Yu| Yamasaki, Noriko| Shiraha, Hidenori| Takaki, Akinobu| Nouso, Kazuhiro| Iwasaki, Yoshiaki| Yamamoto, Kazuhide|
Abstract Nursing support might help patients with chronic hepatitis C (CHC) remain in good mental and physical condition during interferon (IFN) therapy. However, the effects of nursing support have not been studied adequately in this context. This case-control study evaluated the effects of nursing support during IFN therapy. Twenty-four CHC patients who received pegylated IFN and ribavirin were enrolled. Nurses advised patients on the maintenance of their mental and physical condition at weekly visits, based on the results of written questionnaires. An additional 24 patients who received IFN therapy without nursing support and who were matched for age, sex, platelet count, viral serogroup and IFN regimen were selected with propensity score matching as controls. The patients with nursing support during IFN therapy achieved higher sustained virological responses (79%) than those without nursing support (58%). Adherence to the IFN and ribavirin regimens at 24 weeks of therapy were slightly higher in the patients with nursing support than those without it, but these differences were not statistically significant. Adherence to ribavirin after 24 weeks of therapy was significantly higher in those with nursing support than those without it (93% and 66%, p=0.045). These results suggested that nursing support services could contribute to the virological responses of CHC patients by promoting drug-regimen adherence.
Keywords chronic hepatitis C nursing support interferon therapy
Amo Type Original Article
Published Date 2014-10
Publication Title Acta Medica Okayama
Volume volume68
Issue issue5
Publisher Okayama University Medical School
Start Page 263
End Page 268
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2014 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 25338482
Web of Sience KeyUT 000343269300002
JaLCDOI 10.18926/AMO/52900
FullText URL 68_5_307.pdf
Author Muro, Shinichiro| Nasu, Junichiro| Harada, Ryo| Matsubara, Minoru| Nakarai, Asuka| Kanzaki, Hiromitsu| Tsutsumi, Kouichiro| Kato, Hironari| Tanaka, Takehiro| Fujiwara, Hiroyasu| Uno, Masatoshi| Okada, Hiroyuki| Yamamoto, Kazuhide|
Abstract A 45-year-old female who presented with loss of consciousness and a cold sweat was found to have a pancreatic tumor and multiple liver metastases. Laboratory studies showed marked hypoglycemia and inappropriately elevated serum insulin, C-peptide, and serum tumor markers. Fine needle aspiration revealed Grade 3 small-cell type primary pancreatic neuroendocrine carcinoma. Consequently, the diagnosis of malignant insulinoma was made. Transarterial embolization (TAE) for hepatic metastases resulted in the reduction of tumor volume and prompt resolution of hypoglycemic attacks, whereas diazoxide and systemic chemotherapy had been ineffective for controlling blood glucose levels, and octreotide was unavailable due to the allergic effect. This case report highlights the potential usefulness of TAE for malignant insulinomas in the management of hypoglycemia.
Keywords malignant insulinoma hypoglycemia liver metastases transarterial embolization neuroendocrinetumor
Amo Type Case Report
Published Date 2014-10
Publication Title Acta Medica Okayama
Volume volume68
Issue issue5
Publisher Okayama University Medical School
Start Page 307
End Page 311
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2014 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 25338488
Web of Sience KeyUT 000343269300008
Title Alternative Fermented persimmon extract (kaki-shibu) is useful as a standard for component analyses of persimmon phytobezoars
FullText URL 126_127.pdf
Author Iwamuro, Masaya| Okamoto, Yuko| Murata, Toshihiro| Kawai, Yoshinari| Shiraha, Hidenori| Okada, Hiroyuki| Yamamoto, Kazuhide|
Abstract The definite diagnosis of persimmon phytobezoar (i.e., diospyrobezoar) is often accomplished by a component analysis using infrared spectroscopy. However, no studies have been conducted to investigate which substance is the best as a standard for the component analysis. Here we analyzed tannic acid, Japanese persimmon (kaki), fermented persimmon extract (kaki-shibu), conventional dried persimmon, and dried persimmon smoked in sulfur (ampo-kaki) by infrared spectroscopy to determine which would be optimal as a component analysis standard. The spectrum between 1,600 to 600cm-1 of a persimmon phytobezoar was quite similar to the spectrum of kaki-shibu rather than that of tannic acid. Consequently, we conclude that kaki-shibu should be used as a standard for infrared spectroscopy analyses of persimmon phytobezoars.
Keywords 柿胃石(gastric phytobezoar) タンニン酸(tannic acid) 消化管異物(gastrointestinal foreign body) 成分分析(component analysis)
Publication Title 岡山医学会雑誌
Published Date 2014-08-01
Volume volume126
Issue issue2
Start Page 127
End Page 131
ISSN 0030-1558
language 日本語
Copyright Holders Copyright (c) 2014 岡山医学会
File Version publisher
DOI 10.4044/joma.126.127
NAID 130004685263
JaLCDOI 10.18926/AMO/52790
FullText URL 68_4_243.pdf
Author Wada, Nozomu| Yasunaka, Tetsuya| Ikeda, Fusao| Nishina, Sohji| Korenaga, Masaaki| Hino, Keisuke| Fujioka, Shin-ichi| Osawa, Toshiya| Itoshima, Tatsuya| Kawanaka, Miwa| Yamada, Gotaro| Kariyama, Kazuya| Takayama, Hiroki| Kubota, Junichi| Morimoto, Yoichi| Mizushima, Takaaki| Yamashita, Haruhiko| Tanioka, Hiroaki| Negoro, Yuji| Toshimori, Junichi| Kobashi, Haruhiko| Hirano, Atsushi| Itano, Yasuo| Takaki, Akinobu| Yamamoto, Kazuhide|
Abstract Hepatitis B virus (HBV) is one of the major viruses causing acute hepatitis. Recently, the incidence of acute hepatitis with genotype A has been increasing in Japan. The aim of this study was to investigate acute hepatitis B (AHB) in Okayama prefecture, with special attention to HBV genotype A. AHB patients who visited one of 12 general hospitals in Okayama prefecture between 2006 and 2010 were retrospectively analyzed. Over the course of the study period, 128 patients were diagnosed with AHB. Sexual transmission was supposed in the majority of patients (78 patients, 61%), including 59 (76%) having sex with heterosexual partners. The genotypes of HBV were assessed in 90 patients (70%), of whom 27 patients were infected with genotype A, 5 with genotype B, and 58 with genotype C. The prevalence of genotype A was significantly higher among male patients (28.7%), aged 20-29 (35.6%, p<0.01), among men who had sex with men (100%, p<0.005), and among patients having sex with unspecified partners (44.8%, p<0.005). Genotype A was not a significant factor associated with delayed HBsAg disappearance. Caution should be exercised with regard to sexually transmissible diseases in order to slow the pandemic spread of AHB due to genotype A.
Keywords acute hepatitis hepatitis B virus
Amo Type Original Article
Published Date 2014-08
Publication Title Acta Medica Okayama
Volume volume68
Issue issue4
Publisher Okayama University Medical School
Start Page 243
End Page 247
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2014 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 25145410
Web of Sience KeyUT 000340687500006
Author Ishikawa, Hisashi| Takaki, Akinobu| Tsuzaki, Ryuichiro| Yasunaka, Tetsuya| Koike, Kazuko| Shimomura, Yasuyuki| Seki, Hiroyuki| Matsushita, Hiroshi| Miyake, Yasuhiro| Ikeda, Fusao| Shiraha, Hidenori| Nouso, Kazuhiro| Yamamoto, Kazuhide|
Published Date 2014-07-01
Publication Title PLoS ONE
Volume volume9
Issue issue7
Content Type Journal Article
Author Uchida, Daisuke| Shiraha, Hidenori| Kato, Hironari| Nagahara, Teruya| Iwamuro, Masaya| Kataoka, Junro| Horiguchi, Shigeru| Watanabe, Masami| Takaki, Akinobu| Nouso, Kazuhiro| Nasu, Yasutomo| Yagi, Takahito| Kumon, Hiromi| Yamamoto, Kazuhide|
Published Date 2014-05
Publication Title Journal of Gastroenterology and Hepatology
Volume volume29
Issue issue5
Content Type Journal Article
Author Moritou, Yuki| Ikeda, Fusao| Takeuchi, Yasuto| Seki, Hiroyuki| Nanba, Shintaro| Iwasaki, Yoshiaki| Yamamoto, Kazuhide|
Published Date 2014-02
Publication Title Journal of Clinical Microbiology
Volume volume52
Issue issue2
Content Type Journal Article
JaLCDOI 10.18926/AMO/52139
FullText URL 68_1_17.pdf
Author Moritou, Yuki| Ikeda, Fusao| Iwasaki, Yoshiaki| Baba, Nobuyuki| Takaguchi, Kouichi| Senoh, Tomonori| Nagano, Takuya| Takeuchi, Yasuto| Yasunaka, Tetsuya| Ohnishi, Hideki| Miyake, Yasuhiro| Takaki, Akinobu| Nouso, Kazuhiro| Yamamoto, Kazuhide|
Abstract The impact of hepatic steatosis on interferon therapy for patients with chronic hepatitis C (CHC) has been associated with single-nucleotide polymorphisms (SNP) of IL28B, patatin-like phospholipase domain-containing protein 3 (PNPLA3), and low-density lipoprotein (LDL) receptor. Whether this holds true for Japanese patients, however, remains unresolved. The present study prospectively enrolled 226 Japanese patients with CHC, and investigated the impact of hepatic steatosis and its related SNPs, including rs8099917 of IL28B, rs738409 of PNPLA3, and rs14158 of LDL receptor, on outcomes of peg-interferon and ribavirin therapy. In multivariate logistic regression analysis, significant factors affecting the severity of hepatic steatosis were high body mass index and the minor alleles of IL28B SNP (p=0.020 and 0.039, respectively). The risk alleles of PNPLA3 SNP also showed weak association (p=0.059). Severe steatosis and the minor alleles of IL28B SNP were significantly associated with null or partial virological response in patients with HCV genotype 1, as were female gender, and low LDL cholesterol (p=0.049, and <0.001, respectively). The SNP genotype of PNPLA3 and LDL receptor did not have a significant impact on therapeutic outcomes. With respect to the SNP sites examined, the SNP of PNPLA3 has a weak association with severe hepatic steatosis, but not with the outcome of interferon therapy.
Keywords hepatic steatosis genetic polymorphism interferon HCV
Amo Type Original Article
Published Date 2014-02
Publication Title Acta Medica Okayama
Volume volume68
Issue issue1
Publisher Okayama University Medical School
Start Page 17
End Page 22
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2014 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 24553484
Web of Sience KeyUT 000331592800003
Author Matsushita, Hiroshi| Ikeda, Fusao| Iwasaki, Yoshiaki| Seki, Hiroyuki| Nanba, Shintaro| Takeuchi, Yasuto| Moritou, Yuki| Yasunaka, Tetsuya| Onishi, Hideki| Miyake, Yasuhiro| Takaki, Akinobu| Nouso, Kazuhiro| Yamamoto, Kazuhide|
Published Date 2014-02
Publication Title Journal of Gastroenterology and Hepatology
Volume volume29
Issue issue2
Content Type Journal Article
Author Nakarai, Asuka| Kato, Jun| Hiraoka, Sakiko| Kuriyama, Motoaki| Inokuchi, Toshihiro| Takei, Daisuke| Moritou, Yuki| Akita, Mitsuhiro| Takahashi, Sakuma| Harada, Keita| Okada, Hiroyuki| Yamamoto, Kazuhide|
Published Date 2013-12-02
Publication Title 岡山医学会雑誌
Volume volume125
Issue issue3
Content Type Journal Article
Author Kawai, Daisuke| Takaki, Akinobu| Yamamoto, Kazuhide|
Published Date 2013-12-02
Publication Title 岡山医学会雑誌
Volume volume125
Issue issue3
Content Type Journal Article
Author Takahara, Masahiro| Nemoto, Yasuhiro| Oshima, Shigeru| Matsuzawa, Yu| Kanai, Takanori| Okamoto, Ryuichi| Tsuchiya, Kiichiro| Nakamura, Tetsuya| Yamamoto, Kazuhide| Watanabe, Mamoru|
Published Date 2013-12
Publication Title Immunology Letters
Volume volume156
Issue issue1-2
Content Type Journal Article
JaLCDOI 10.18926/AMO/51864
FullText URL 67_5_285.pdf
Author Akita, Mitsuhiro| Hiraoka, Sakiko| Kaji, Eisuke| Takemoto, Koji| Nagahara, Yasuhiro| Yamamoto, Hiroshi| Yamamoto, Kazuhide| Kato, Jun|
Abstract Whether presence or history of extracolonic primary malignancy is a risk for colorectal neoplasia is not fully known. In this study, 26,452 first-time colonoscopy cases were examined using a colonoscopy database. Among the analyzed subjects, 3,026 (11%) subjects had history or concomitance of extracolonic primary malignancy, while the remaining 23,426 subjects did not. Colorectal neoplasia was observed in 39% of all the subjects. A crude comparison showed that the prevalence of any type of colorectal neoplasia was higher in subjects with extracolonic malignancy than in those without (42% vs. 39%, p=0.0012). However, after adjusting for confounding factors, the odds ratios (ORs) of subjects with extracolonic malignancy for having colorectal neoplasia, advanced neoplasia, and cancer were all less than 1.0, and all significantly different from those of subjects without extracolonic malignancy. Analysis according to the type of extracolonic malignancy revealed that gastric cancer cases had a significantly lower risk for colorectal advanced neoplasia (OR:0.81;95% CI:0.67-0.99). Among major malignancies, only esophageal squamous cell cancer cases had increased risk for colorectal neoplasia (OR:1.66;95% CI:1.20-2.29). Patients with presence or history of extracolonic malignancy did not carry a higher risk of occurrence of colorectal neoplasia.
Keywords colorectal cancer colonoscopy risk factor database
Amo Type Original Article
Published Date 2013-10
Publication Title Acta Medica Okayama
Volume volume67
Issue issue5
Publisher Okayama University Medical School
Start Page 285
End Page 292
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2013 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 24145728
Web of Sience KeyUT 000325836100002
Author Onji, Masahiro| Kanno, Atsuo| Saitoh, Shin-Ichiroh| Fukui, Ryutaro| Motoi, Yuji| Shibata, Takuma| Matsumoto, Fumi| Lamichhane, Aayam| Sato, Shintaro| Kiyono, Hiroshi| Yamamoto, Kazuhide| Miyake, Kensuke|
Published Date 2013-06
Publication Title Nature Communications
Volume volume4
Content Type Journal Article
Author Fujii, Masakuni| Kawamoto, Hirofumi| Tsutsumi, Koichiro| Kato, Hironari| Hirao, Ken| Kurihara, Naoko| Mizuno, Osamu| Ishida, Etsuji| Ogawa, Tsuneyoshi| Fukatsu, Hirotoshi| Yamamoto, Kazuhide|
Published Date 2013-05
Publication Title Hepato-Gastroenterology
Volume volume60
Issue issue123
Content Type Journal Article