Masahiro Sakaguchi

Teine Keijinkai Hospital, Sapporo, Hokkaidō, Japan

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Publications (7)12.18 Total impact

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    ABSTRACT: To compare efficacy of proton pump inhibitors (PPIs) with H(2)-receptor antagonists (H(2)RAs) plus prokinetics (Proks) for dysmotility-like symptoms in functional dyspepsia (FD). Subjects were randomized to receive open-label treatment with either rabeprazole 10 mg od (n = 57) or famotidine 10 mg bid plus mosapride 5 mg tid (n = 57) for 4 wk. The primary efficacy endpoint was change (%) from baseline in total dysmotility-like dyspepsia symptom score. The secondary efficacy endpoint was patient satisfaction with treatment. The improvement in dysmotility-like dyspepsia symptom score on day 28 was significantly greater in the rabeprazole group (22.5% ± 29.2% of baseline) than the famotidine + mosapride group (53.2% ± 58.6% of baseline, P < 0.0001). The superior benefit of rabeprazole treatment after 28 d was consistent regardless of Helicobacter pylori status. Significantly more subjects in the rabeprazole group were satisfied or very satisfied with treatment on day 28 than in the famotidine + mosapride group (87.7% vs 59.6%, P = 0.0012). Rabeprazole therapy was the only significant predictor of treatment response (P < 0.0001), defined as a total symptom score improvement ≥ 50%. PPI monotherapy improves dysmotility-like symptoms significantly better than H(2)RAs plus Proks, and should be the treatment of first choice for Japanese FD.
    World Journal of Gastroenterology 04/2012; 18(13):1517-24. · 2.55 Impact Factor
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    ABSTRACT: A 63-year-old woman who presented with chest and back pain underwent an upper gastrointestinal endoscopy which revealed elevated legion in the antrum mucosa. Histologic examinations of gastric biopsies were showing monoclonal proliferation plasma cells containing Russell bodies. Differential diagnosis from B-cell lymphoma and plasmacytoma is difficult, because of monoclonality. Molecular analyses of immunoglobulin heavy chain (IgH) gene demonstrated that gene rearrangement was negative. Thus, diagnosis of Russell body gastritis was made. The Giemsa stains were also showing infection of Helicobacter pylori (H.pylori). After eradication therapy for H.pylori, follow-up upper gastrointestinal endoscopy was performed. She then recovered.
    Nippon Shokakibyo Gakkai zasshi The Japanese journal of gastro-enterology 01/2012; 109(6):929-35.
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    ABSTRACT: In Europe and the United States, it is known that obesity, which is increasing, is closely associated with gastroesophageal reflux disease (GERD), but in Japan no definite consensus has been reached on this relationship. Clarification of the relationship between the two is an important issue. After screening, gastrointestinal endoscopic examinations were conducted on 1813 subjects who were surveyed using a questionnaire in which they recorded body weight, height, weight loss or gain, chief complaints, and underlying disease to prospectively examine the relationship between obesity and GERD. Differences in GERD prevalence and esophageal hiatal hernia prevalence in thin (body mass index less than 18.5 kg/m2), normal (18.5 to 25.0), and obese (greater than 25.0) subjects were examined, and the differences in GERD prevalence in patients with weight loss or gain were also investigated. GERD prevalence was 20.96% in the thin group, 24.42% in the normal group, and 31.86% in the obese group, indicating a significantly higher prevalence in the obese group compared with the other groups. The prevalence of hernia was also significantly higher in the obese group. GERD prevalence in the weight gain group was significantly higher than in the unchanged weight group and weight loss group. Both GERD prevalence and the prevalence of hernia were significantly higher in obese subjects, and the prevalence of GERD in subjects who had gained weight was also significantly higher. From these results, it was concluded that obesity is a risk factor for GERD in Japan.
    Journal of Gastroenterology 02/2008; 43(1):57-62. · 3.79 Impact Factor
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    ABSTRACT: A 42-year-old male dialysis patient was infected with hepatitis C virus (HCV), and treated with interferon beta (IFN-beta) for a rapid increase in viral load. After dialysis three times a week, 3 million units of IFN-beta were intravenously infused for 1 h. The treatment was markedly effective, and the virus was eliminated in the sixth week. Therapy was continued for 24 weeks, and HCV negativity has been maintained for more than 6 months after the completion of administration. The blood IFN level slowly decreased immediately after administration. The mean trough level was 37 U/mL, and the half-life was 65 min. No adverse event requiring discontinuation of the treatment occurred, showing that IFN alone may safely eliminate the virus in dialysis patients with high hepatitis C viral load. Many dialysis patients are latently infected with HCV, and the infection affects the prognosis. Therefore, establishment of a therapeutic method is urgently needed.
    Therapeutic apheresis and dialysis: official peer-reviewed journal of the International Society for Apheresis, the Japanese Society for Apheresis, the Japanese Society for Dialysis Therapy 09/2007; 11(4):306-8. · 1.53 Impact Factor
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    ABSTRACT: Helicobacter pylori has been reported to play an important role in the development of gastritis and gastric ulcer. This study included 168 patients with end-stage renal disease (ESRD; 30 non-dialysis patients, 138 patients receiving dialysis; mean duration of dialysis: 57.3 +/- 61.7 months) and 138 control volunteers. We investigated the prevalence of H. pylori infection by measuring H. pylori antibody (IgG) levels. The prevalence of H. pylori infection was 62.3% in the control group, 53.3% in the non-dialysis patients, and 36.9% in the dialysis patients. The percentage decreased with a reduction of renal function. In addition, the proportion of H. pylori-positive patients decreased with the duration of dialysis, and the antibody titre was also significantly decreased. There was no association between long-term oral administration of H2RA (H2 receptor antagonist) and the incidence of H. pylori infection. Among dialysis patients, the proportion of H. pylori-positive patients was low. An aetiological factor other than H2RA agents was suggested. Renal failure or dialysis treatment may influence H. pylori infection.
    Nephrology 05/2004; 9(2):73-6. · 1.69 Impact Factor
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    ABSTRACT: Perforated duodenal ulcer was clinically evaluated with respect to Helicobacter pylori infection and rate of recurrence in 38 ulcer patients perforated and 154 patients with non-perforated duodenal ulcer who visited our hospital in past 5 years and 6 months. The frequency of occurrence of H. pylori-positivity was 42.1% in patients with perforated duodenal ulcer, significantly lower than that of 92.9% in patients with non-perforated lesions. This result suggests that H. pylori is hardly involved in the development of perforated duodenal ulcer. The rate of recurrence was significantly lower for perforated duodenal ulcer than for non-perforated ulcer. In particular, perforated duodenal ulcer did not recur in the group on maintenance therapy with H2-recepter antagonists. Maintenance therapy using inhibitors of gastric acid secretion seems effective for the prevention of recurrence of perforated duodenal ulcer.
    Nippon Shokakibyo Gakkai zasshi The Japanese journal of gastro-enterology 11/2002; 99(10):1197-204.
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    ABSTRACT: Helicobacter pylori (H. pylori) is considered to cause gastritis and gastric ulcer. In dialysis patients, digestive tract hemorrhage is sometimes fatal. However, in regard to H. pylori infection in patients with end-stage renal disease (ESRD), many issues remain to be clarified. This study included 76 symptom-free patients with ESRD. The subjects consisted of 25 patients with chronic renal failure who had not received dialysis and 51 patients receiving dialysis. On upper digestive tract endoscopy, specimens were taken for analysis of H. pylori. Urease test, culture, and microscopy were performed. In non-dialysed patients, the prevalence of H. pylori-positive patients was 56.0%. In dialysed patients, the percentage was significantly lower (27.5%). In dialysed patients, the mean duration of dialysis was 8.1 +/- 7.5 months (mean +/- SD) in H. pylori-positive patients and 56.2 +/- 60.9 months (mean +/- SD) in H. pylori-negative patients (p < 0.001). 11 of 13 non-dialysed patients with chronic gastritis were positive for H. pylori. However, only 5 of 24 dialysed patients were positive for H. pylori infection. Long-term dialysis decreased the prevalence of H. pylori. The reduction of gastric acid secretion related to chronic gastritis may be involved.
    American Journal of Nephrology 01/2002; 22(5-6):468-72. · 2.62 Impact Factor