Publications by authors named "Takao Ueno"

Article Synopsis
  • * A study evaluated a new method for visualizing 3D dose distributions using panoramic reconstruction computed tomography images in four head and neck cancer patients, achieving a high correlation in dose metrics.
  • * The method aids dentists by providing clear visualizations of radiation doses that can lead to complications, improving the management of dental care for these patients.
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Background: Oral ulcerative mucositis (OUM) is common in patients with cancer, particularly in those undergoing chemoradiation therapy. The effective management of OUM is crucial for continuous cancer care and patient well-being. Recent studies have advanced our understanding of the causes, leading to clinical trials toward novel treatments.

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Article Synopsis
  • Brachytherapy is a targeted radiation therapy directly applied to tumors, offering better local control compared to external beam radiation therapy (EBRT), but is usually more invasive.
  • Patients receiving brachytherapy for head and neck cancers face significant challenges, including physical issues, nutritional needs, and pain management.
  • The article aims to educate radiation oncologists and nurses on nursing care for patients undergoing high-dose rate interstitial brachytherapy (ISBT) due to the lack of existing resources on this topic.
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Currently, tongue cancers are primarily managed by surgery, and interstitial brachytherapy is only recommended for a selected group of early state T1-2N0 patients who refuse surgery or are medically inoperable. In this report, a case with T3N2cM0 tongue cancer who has been effectively treated by the combination of concurrent chemoradiotherapy involving volumetric arc therapy and boost high-dose rate interstitial brachytherapy is presented. Of course, surgery remains the main treatment strategy for tongue cancer patients; however, the authors believe that if volumetric arc therapy is carefully planned to reduce the mandible dose as much as possible and high-dose rate interstitial brachytherapy with a mouthpiece that protects the mandible is combined, it is possible to treat T3N2 disease, and this can be considered for patients who want to preserve organ function.

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Background: Oral mucositis is one of the main areas of research in supportive and palliative care of cancer patients. However, the methodology of prospective clinical trials on oral mucositis has not been established, despite its uniqueness. Here, we propose a novel research policy on oral mucositis, including an implementable set of recommendations for researchers conducting clinical trials.

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Several clinical studies have reported that Japanese herbal medicine Hangeshashinto (HST) has beneficial effects on chemotherapy-induced oral ulcerative mucositis (OUM). Our previous research demonstrated that HST improves chemotherapy-induced OUM through human oral keratinocyte (HOK) migration, which was suppressed by mitogen-activated protein kinase (MAPK) and C-X-C chemokine receptor 4 (CXCR4) inhibitors. However, the association between these molecules and HOK migration was unclear.

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  • This study evaluated the effectiveness of Episil® oral liquid for treating oral mucositis (OM) in cancer patients, highlighting its potential to improve quality of life by alleviating pain.
  • Conducted with 10 Japanese cancer patients undergoing chemotherapy or radiation, the study found significant pain reduction using Episil®, with effects lasting up to 120 minutes post-application.
  • Despite slight transient discomfort reported during application, no major adverse events occurred, suggesting Episil® is a safe option for managing oral pain in patients with OM.
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Because of its rarity, no standard therapy exists for localized squamous cell carcinoma of the nasal vestibule. Interstitial brachytherapy (ISBT) is reported to be a preferable treatment modality of choice for early-stage localized nasal vestibule cancer. In this report, a nasal vestibule cancer with hard palate invasion (T3) was treated by definitive radiation therapy.

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Purpose: Advances in allogeneic hematopoietic cell transplantation (allo-HCT) have resulted in a growing number of transplant survivors; however, long-term survivors are at risk of developing late complications, and published guidelines recommend screening of this population. We conducted a single-center prospective study to evaluate the adherence to and usefulness of recommended screenings at a long-term follow-up (LTFU) clinic.

Methods: We included consecutive patients who received allo-HCT at our center from 2014, as well as post-HCT patients visiting our outpatient clinic.

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Oral mucositis (OM) is one of the most frequently observed adverse oral events in radiation therapy for patients with head and neck cancer. Thus, objective evaluation of OM severity is needed for early and timely intervention. Here, we analyzed the time-course of salivary metabolomic profiles during the radiation therapy.

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Aim: Topical administration of oral gel may reduce radiotherapy-related oral complications. The aim of this study was to examine clinical and microbiological effects of self-administration of different gel formulations to oral mucosa in head and neck cancer patients.

Materials And Methods: Twenty-seven subjects were recruited from outpatients who underwent radiotherapy of at least 50 Gy to the head and neck area.

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The aim of this study was to compare the estimated public medical care cost of measures to address metallic dental restorations (MDRs) for head and neck radiotherapy using high-energy mega-voltage X-rays. This was considered a first step to clarify which MDR measure was more cost-effective. We estimated the medical care cost of radiotherapy for two representative MDR measures: (i) with MDR removal or (ii) without MDR removal (non-MDR removal) using magnetic resonance imaging and a spacer.

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India has a huge burden of head and neck cancer and specifically oral cancer. Supportive oral care is not a standard of care in our population and is often neglected. Currently, there are no specific guidelines for such care in India which could be followed.

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Our previous study by Murakami N, Mori T, Nakamura S, Yoshimoto S, Honma Y, Ueno T, Kobayashi K, Kashihara T, Takahashi K, Inaba K, Okuma K, Igaki H, Nakayama Y, Itami J. (J Radiat Res. 2019 Jul 30.

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Medication-related osteonecrosis of the jaw (MRONJ) is a rare but serious adverse event of bone-modifying agents used to prevent bone complications in cancer patients with bone metastasis. Currently, early treatment is the only way to prevent further progression, as the pathogenesis of MRONJ has not yet been elucidated, and a standard treatment has not been established. The aim of this study was to identify a marker for early detection marker of MRONJ by exploring substances in saliva specific to MRONJ at an early stage.

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Article Synopsis
  • Oral mucositis (OM) is a common side effect of chemotherapy, often diagnosed based on patient reports, and this study aimed to create a more accurate diagnostic tool.
  • A central review system (CRS) was implemented to evaluate OM without prior patient background knowledge, comparing it to individual clinician assessments from four institutions.
  • Results showed the CRS identified OM in 84.9% of patients, significantly higher than the 41.5% detection rate by clinicians, highlighting that OM may be frequently underestimated in chemotherapy patients.
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A reliable biomarker can contribute to appropriate treatment selection in the management of head and neck squamous cell carcinoma (HNSCC). Recently, epithelial cell adhesion molecule (EpCAM) was shown to have prognostic features in several malignancies. However, it remains to be elucidated whether EpCAM predicts prognosis of HNSCC after radiotherapy.

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Article Synopsis
  • The study evaluates a hybrid brachytherapy technique (HBT) that combines interstitial catheters with a specially designed oral spacer for treating complex cases of squamous cell carcinoma of the buccal mucosa (BSCC).
  • A retrospective review of patients treated with HBT from 2013 to 2017 showed improved dose distribution and tumor coverage compared to traditional interstitial catheter-only approaches (ISBT-only).
  • Results indicate that HBT provides better coverage of irregular tumor shapes, making it a superior option for early-stage BSCC, especially around challenging anatomical areas.
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Article Synopsis
  • - The study investigated how different assessments of oral mucositis severity from chemoradiotherapy can impact cancer treatment outcomes, emphasizing the need for effective therapies to manage this side effect.
  • - Researchers compared the severity grades of oral mucositis evaluated by local investigators and an independent central review, finding a significant discrepancy of 34% between the two assessments.
  • - The results showed differences in the rates of severe mucositis among treatment groups, indicating that using a standardized and objective evaluation method is crucial for improving clinical trial accuracy and treatment effectiveness.
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  • Oral mucositis (OM) is a painful side effect for cancer patients on chemotherapy, and an elemental diet (ED) might help in reducing its incidence, though previous studies lacked clarity on the dose and effects.
  • In a study with esophageal cancer patients undergoing chemotherapy, 70% completed the ED at a dose of 160 g/day for 49 days; those who completed the diet had a significantly lower incidence of grade ≥ 2 OM compared to those who did not.
  • The findings suggest that an elemental diet could be an effective treatment to reduce OM, warranting further investigation through randomized studies.
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  • The study evaluates a narrower radiation strategy for postoperative head and neck squamous cell carcinoma, intended to lower late radiation toxicities while monitoring patients more closely than in Western countries.
  • It includes an analysis of 72 patients treated between 2005 and 2014, considering factors such as age, lymph node status, and tumor extent to determine radiation field coverage.
  • Results showed that while 32 patients experienced disease relapse (primarily local or regional), the strategy was proposed to not compromise overall patient survival due to quick identification and salvage surgeries for recurrences.
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The cancer patients who received chemotherapy, radiotherapy, hematopoietic stem cell transplant and terminal care often have a wide range of stomatitis, which induces severe pain and limits fundamental life behaviors such as "eating, drinking and talking". In addition, oral mucositis frequently leads to systemic infection through opportunistic microorganisms, which causes extension of hospitalization. Severe oral mucositis often causes cancer patients to partially or completely discontinue/modify cancer therapy regimen, which adversely affects the curative effects of cancer.

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  • This study aimed to compare complications of Cetuximab-radiation therapy and concurrent chemoradiation (cCRT) in patients with advanced head and neck cancer, particularly focusing on gastrointestinal (GI) hemorrhage.
  • A total of 30 patients were analyzed, with those receiving Cetuximab-radiation experiencing significantly higher rates of severe skin reactions and requiring more hospitalizations compared to the cCRT group.
  • The findings suggest that certain patients on Cetuximab-radiation may also face greater risks for GI complications, emphasizing the need for careful patient selection and monitoring.
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  • Bevacizumab, an anti-cancer drug, has shown benefits in treating metastatic colorectal cancer but has been linked to periodontitis in some patients.
  • A study examined 274 patients who received bevacizumab, finding that 9.5% developed periodontitis, with most patients showing good overall health.
  • After conservative treatment for periodontitis, 85% of patients improved, highlighting the need for preventive dental care in patients undergoing bevacizumab therapy.
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C(60) reacted with aromatic and aliphatic carboxylic acids in the presence of inexpensive FeCl(3) at room temperature to produce hydroxyfullerenyl esters C(60)(OCOR)(OH) in up to 68% isolated yield. The hydroxyl group was utilized in functional group transformations to obtain a diester derivative C(60)(OCOAr)(OCOPh) (Ar = 2,6-xylyl) and a siloxyl derivative C(60)(OCOAr)(OSiMe(3)). The diester and siloxyl derivatives were found to possess low-lying LUMO levels were utilized in organic photovoltaic devices showing 1.

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