Publications by authors named "Sumii T"

Article Synopsis
  • A nationwide surveillance in Japan studied the antimicrobial susceptibility of bacteria in acute uncomplicated cystitis, focusing on E. coli, K. pneumoniae, and S. saprophyticus, between April 2020 and September 2021.
  • The study isolated 823 bacterial strains from urine samples of 848 patients, with a majority being E. coli (92.9%), and determined susceptibility to 18 antibacterial agents.
  • Results showed a concerning increase in fluoroquinolone-resistant E. coli and extended-spectrum β-lactamase (ESBL)-producing E. coli, especially in postmenopausal women, highlighting the need for clinicians to adapt their antibiotic choices due to rising resistance rates.
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Neisseria gonorrhoeae is one of the important pathogens of sexually transmitted infections. N. gonorrhoeae is rapidly becoming antimicrobial resistant, and there are few drugs that are effective in the initial treatment of gonorrhea.

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Article Synopsis
  • The Urogenital Sub-committee and Surveillance Committee of various Japanese health organizations conducted a nationwide study to assess how susceptible Chlamydia trachomatis is to different antibiotics by collecting clinical samples from 26 hospitals between May 2016 and July 2017.
  • The study measured the minimum inhibitory concentrations (MICs) for a range of antibiotics, finding no resistant strains to fluoroquinolones, tetracyclines, or macrolides, while solithromycin showed particularly favorable MIC values.
  • However, the MIC for azithromycin was slightly higher than in previous reports, suggesting the need for ongoing monitoring of its susceptibility.
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The Japanese Surveillance Committee conducted a second nationwide surveillance of antimicrobial susceptibility patterns of uropathogens responsible for acute uncomplicated cystitis (AUC) in premenopausal patients aged 16-40 years old at 31 hospitals throughout Japan from March 2015 to February 2016. In this study, the susceptibility of causative bacteria (Escherichia coli, Klebsiella pneumoniae, Staphylococcus saprophyticus) for various antimicrobial agents was investigated by isolation and culturing of organisms obtained from urine samples. In total, 324 strains were isolated from 361 patients, including E.

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When the liver is damaged, hepatic stellate cells (HSCs) can change into an activated, highly migratory state. The migration of HSCs may be affected by shear stress due not only to sinusoidal flow but also by the flow in the space of Disse because this space is filled with blood plasma. In this study, we evaluated the effects of shear stress on HSC migration in a scratch-wound assay with a parallel flow chamber.

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Article Synopsis
  • * A surveillance study conducted in Japan collected urethral discharge samples from patients in 2009 and 2012 to test for antibiotic resistance in C. trachomatis isolates.
  • * Results showed that no resistant strains were found against common antibiotics like fluoroquinolones, tetracyclines, or macrolides during both years of the study.
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Hepatic functions, such as albumin secretion and ammonia metabolism, are upregulated in response to hepatocyte growth factor (HGF) produced by hepatic stellate cells (HSC), as well as nitric oxide (NO) produced by endothelial cells under shear stress. However, the simultaneous effect of HSC and NO has not been previously investigated in a tri-co-culture model containing hepatocytes with HSC and endothelial cells under shear stress. We hypothesized that NO inhibits HGF production from HSC.

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Worldwide, the most important concern in the treatment of sexually transmitted infections is the increase in antimicrobial resistant Neisseria gonorrhoeae strains including resistance to cephalosporins, penicillins, fluoroquinolones or macrolides. To investigate the trends of antimicrobial susceptibility among N. gonorrhoeae strains isolated from male patients with urethritis, a Japanese surveillance committee conducted the second nationwide surveillance study.

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Neisseria gonorrhoeae is one of the most important pathogens causing sexually transmitted infection, and strains that are resistant to several antimicrobials are increasing. To investigate the trends of antimicrobial susceptibility among N. gonorrhoeae strains isolated from male patients with urethritis, a Japanese surveillance committee conducted the first nationwide surveillance.

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Article Synopsis
  • A nationwide surveillance study conducted in Japan from April 2009 to November 2010 examined antimicrobial susceptibility patterns of uropathogens causing acute uncomplicated cystitis in women, involving 43 hospitals.
  • The study identified E. coli as the most common bacteria (77.8%) in urine samples, with significant occurrences of S. saprophyticus in premenopausal women, while also analyzing their resistance to 19 antimicrobial agents.
  • Results indicated high susceptibility of E. coli to fluoroquinolones and cephalosporins, but a rising trend in fluoroquinolone-resistant and ESBL-producing strains highlights the need for careful selection of empirical treatments based on patient characteristics.
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Endothelial nitric oxide synthase (eNOS) is the primary enzyme that produces nitric oxide (NO), which plays an important role in blood vessel relaxation. eNOS activation is stimulated by various mechanical forces, such as shear stress. Several studies have shown that local cooling of the human finger causes strong vasoconstriction, followed after several minutes by cold-induced vasodilation (CIVD).

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There is no agreement on the standard chemotherapeutic regimen for biliary tract cancer(BTC), although multi-drug regimens such as gemcitabine and/or S-1 have been tested in clinical trials. This study retrospectively reviewed data from patients with BTC who were seen at hospitals in the Kitakyushu and Fukuoka areas between 2005 and 2006, and examined the effect of systemic chemotherapy regimen on survival benefits in patients with unresectable BTC. Chemotherapy may benefit patients with BTC any age group, regardless of the primary site.

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The patient was a 70-year-old man with metastatic pancreatic cancer. After he received combination chemotherapy with gemcitabine and oral S-1 on day 1, he experienced severe general fatigue, anorexia and nausea. Then we changed the dose of gemcitabine from 1,000 mg/m(2) 2 to 500 mg/m(2) according to the criteria for an individual maximum repeatable dose (iMRD) determination method on day 8.

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The aim of this phase I/II study was to evaluate the tolerability and efficacy of combination chemotherapy with gemcitabine (GEM) and UFT for advanced pancreatic cancer. In phase I study UFT was given orally every day for 14 days and GEM was infused on day 1 and 8 at three dose levels (800, 900, 1,000 mg/m(2)/week) every 21 days. GEM 1,000 mg/m(2) and UFT 400 mg/m(2) did not reach the maximum tolerated dose.

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The authors present a rare case of cervical myelopathy caused by dropped head syndrome. This 68-year-old woman presented with her head hanging forward. After 1 month, she was admitted to the medical service because of head drop progression.

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Objectives: Up to now, the characteristics of pancreatic endocrine and exocrine functions in autoimmune pancreatitis (AIP) are still unclear. The aim of this study is to evaluate pancreatic functions in AIP compared with those of chronic pancreatitis (CP).

Methods: Twelve patients with AIP and 25 patients with CP were examined for exocrine and endocrine pancreas.

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In two patients with advanced pancreatic cancer with cervical lymph node or liver metastasis and no indication of pancreatic resection and radiotherapy, oral treatment with S-1 (an anti-cancer agent of fluoropyrimidine derivative) exerted high anti-tumor activity on the metastatic lesions. Both cases responded well to this therapy in the late phase II study of S-1 in patients with advanced pancreatic cancer designed to evaluate efficacy and safety. In Case 1 (with cervical lymph node metastasis), the anti-tumor efficacy of this therapy was evaluated as a partial response (PR) after the first four courses of treatment.

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Eighteen patients with metastatic or post-surgery recurrent pancreatic cancer were given weekly gemcitabine therapy. Almost all of these patients were aged or had other complications. We determined the individualized maximum repeatable dose (iMRD)as follows.

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The manufacture of laminated-type mouthguards requires skill in fusing sheets of mouthguard materials together. Adequate adhesive strength is required to use mouthguards in a stable condition for a long time. Therefore, in this study, the exfoliation test was applied and some treating techniques and conditions that improve the adhesive strength on a laminated surface were examined.

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Article Synopsis
  • A phase I/II study was conducted to assess the combination of gemcitabine and infusional 5-FU in Japanese pancreatic cancer patients, focusing on recommended dosages, efficacy, and toxicity.
  • Phase I determined a safe dosage of 5-FU (400 mg/m²/day) and identified severe hematological toxicities as common side effects, while 28 patients in phase II showed limited overall survival benefits.
  • Although the treatment did not significantly improve survival compared to gemcitabine alone, it suggested moderate effectiveness as a palliative option with low toxicity for metastatic pancreatic cancer in this patient population.
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There is increasing interest in using algorithms combining multiple magnetic resonance imaging (MRI) modalities to predict tissue infarction in acute human stroke. We developed and tested a voxel-based generalized linear model (GLM) algorithm to predict tissue infarction in an animal stroke model in order to directly compare predicted outcome with the tissue's histologic outcome, and to evaluate the potential for assessing therapeutic efficacy using these multiparametric algorithms. With acute MRI acquired after unilateral embolic stroke in rats (n=8), a GLM was developed and used to predict infarction on a voxel-wise basis for saline (n=6) and recombinant tissue plasminogen activator (rt-PA) treatment (n=7) arms of a trial of delayed thrombolytic therapy in rats.

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We describe the present and future directions of home therapy in pancreatic cancer patients according to the chemotherapy and best supportive care. Chemotherapy in an outpatient clinic is widely supported by the use of gemcitabine, and useful because of mild adverse effect, good clinical benefit response and survival benefit. Since there is no secondary chemotherapy agent after gemcitabine treatment failure, best supportive care is essential.

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A 17-year-old man was admitted to hospital because of epigastric pain. Various imaging studies showed a solid tumor (4cm in diameter) in the tail of the pancreas, multiple hypovascular tumors in liver. Serum levels of DUPAN2, SPAN1 and NSE were elevated slightly.

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