Publications by authors named "Kusano Y"

Completion of DNA replication before chromosome segregation is essential for the stable maintenance of the genome. Under replication stress, DNA synthesis may persist beyond S phase, especially in genomic regions that are difficult to proceed with the replication processes. Incomplete replication in mitosis emerges as non-disjoined segment in mitotic chromosomes leading to anaphase bridges.

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Background/aim: The current study aimed to evaluate a treatment planning method that is robust against tumor growth and to assess its effectiveness in particle therapy for head and neck cancer.

Patients And Methods: The proposed method optimizes dose distribution by replacing the relative stopping power ratio (rSPR) of the clinical target volume (CTV) cavity region with a tumor-equivalent rSPR (Condition 1). The optimized initial treatment plan template was then recalculated using in-room CT images acquired in the same treatment position, and the doses to the tumor and organs at risk were compared with those in the initial treatment plan.

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()-Enediynes were successfully synthesized from a trio of terminal ethynes through consecutive three-step reactions: iodosulfonylation of ethyne with I/PhSONa, followed by ethynylations of iodo and sulfonyl moieties of the resulting iodosulfonylethene via Sonogashira-Hagihara coupling and nucleophilic addition-elimination, respectively. The molecular structure of the obtained ()-enediyne was fully characterized by X-ray crystal structure analysis, revealing that the nucleophilic substitution of ()-sulfonylethene with arylethynide underwent a selective stereoinversion. The ()-enediynes exhibited photoluminescence in both the solution and solid states (crystals and powders).

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Silicon oxide (SiOx) coatings are attracting significant attention and are widely used in industrial applications. They can be prepared by plasma-assisted chemical vapor deposition (PACVD). PACVD at atmospheric pressure (AP-PACVD) is often employed to synthesize SiOx coatings, but it has generally not been scaled up to an industrially viable level.

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  • This study focuses on using a surfactant hydrogel dosimeter (SHD) to accurately measure 3D absorbed dose distributions in carbon ion radiotherapy, which is important for targeting tumors effectively.
  • The researchers set up a cubic target region and conducted carbon ion beam irradiation, measuring the response of the SHD using optical computed tomography to gather data about the absorbed dose.
  • Results showed that the optical attenuation coefficients (OAC) measured were lower than the expected absorbed dose, indicating discrepancies that may affect precise dosimetry in treatment planning.
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Objectives: Disruption of the oxidative stress defense system is involved in developing various diseases. Sulfur compounds such as glutathione (GSH) and cysteine (CysSH) are representative antioxidants in the body. Recently, supersulfides, including reactive persulfide and polysulfide species, have gained attention as potent antioxidants regulating oxidative stress and redox signaling.

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  • * Single-balloon endoscopy was performed to manage biliary drainage, revealing a scar-like feature around the anastomosis and a milky whitish area indicating inflammation and fibrosis.
  • * Endoscopic dilatation through a pinhole in the stricture was successfully performed, and a plastic stent was placed, demonstrating a positive outcome and highlighting the utility of targeting the MWA as a landmark in guiding endoscopic interventions for challenging HJAS cases.
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  • Esophageal cell tumors are uncommon, but a case study presented a 48-year-old woman with an elevated esophageal lesion and long-segment Barrett's esophagus identified through an endoscopy.
  • Endoscopic ultrasonography revealed a 15 mm tumor that extended from the lamina propria mucosa to the submucosa, which was later diagnosed as a granular cell tumor based on biopsy results showing specific cell characteristics.
  • This case marks the first documented instance of a granular cell tumor arising in the context of long-segment Barrett's esophagus, and the tumor was successfully removed via endoscopic submucosal dissection.
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Although there is growing evidence of the efficacy of carbon-ion radiotherapy (CIRT) for locally advanced cervical adenocarcinoma, reports on combined treatment with CIRT and image-guided brachytherapy (IGBT) are scarce. We retrospectively analyzed patients with International Federation of Gynecology and Obstetrics (2008) stage II-IVA locally advanced cervical adenocarcinoma who received combined scanning CIRT (sCIRT) and IGBT between April 2019 and March 2022. sCIRT consisted of whole-pelvic irradiation with 36 Gy (relative biological effectiveness [RBE]) in 12 fractions and subsequent local boost irradiation with 19.

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Immune checkpoint inhibitors (ICIs) are widely used in cancer treatment; however, they can lead to immune-related adverse events, including immune checkpoint inhibitor-induced type 1 diabetes mellitus (ICI-T1DM). While fulminant T1DM is common in East Asia, ICI-T1DM has predominantly been reported in Western countries. In this report, we present the case of a 66-year-old Japanese man with type 2 diabetes mellitus undergoing dialysis for diabetic nephropathy.

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Plasmas are reactive ionised gases, which enable the creation of unique reaction fields. This allows plasmas to be widely used for a variety of chemical processes for materials, recycling among others. Because of the increase in urgency to find more sustainable methods of waste management, plasmas have been enthusiastically applied to recycling processes.

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  • Transcatheter arterial chemoembolization (TACE) for hepatocellular carcinoma can lead to complications like fever, abdominal pain, and liver dysfunction.
  • In a 68-year-old male patient, persistent symptoms after TACE were linked to bile duct obstruction from necrotic tumor material.
  • The case highlights the need to consider bile duct issues when evaluating post-TACE complications.
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One of the most distinguished features in biological effects of heavy ions would be the decrease of oxygen effect in the high-LET region. This feature has been referred to as the radiobiological basis for the control of hypoxic fraction in cancer radiotherapy. However, mechanisms to explain this phenomenon have not been fully understood.

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Purpose: The aim of this study was to identify the postoperative recurrence rate of recurrent pterygium and to evaluate risk factors for the recurrence.

Methods: This study was a retrospective interventional nonrandomized consecutive case series. In this single-center study, 119 eyes of patients with recurrent pterygium who underwent surgery with a follow-up period of >12 months after the surgery were analyzed.

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The KEAP1-NRF2 system plays a central role in cytoprotection in defence mechanisms against oxidative stress. The KEAP1-NRF2 system has been regarded as a sulfur-utilizing cytoprotective mechanism, because KEAP1 serves as a biosensor for electrophiles by using its reactive thiols and NRF2 is a transcriptional factor regulating genes involved in sulfur-mediated redox reactions. NRF2 is a key regulator of cytoprotective genes, such as antioxidant and detoxification genes, and also possesses potent anti-inflammatory activity.

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  • The study investigates the impact of chronic stress from the COVID-19 pandemic on ulcerative colitis (UC) patients, particularly after the initial wave of infections that exacerbated their condition.
  • It evaluates 289 UC patients over three years (2020, 2021, and 2022), measuring disease activity through various indices and clinical scores.
  • Results show that while UC symptoms worsened during the first wave in 2020, patients experienced significant recovery in 2021 and maintained stability in 2022, despite ongoing pandemic stress.
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This study aimed to establish a treatment planning strategy with carbon-ion scanning radiotherapy (CIRTs) for stage I esophageal cancer. The clinical data of seven patients treated with CIRTs were used. The setup error and interfractional and intrafractional motion error were analyzed using in-room computed tomography (CT) images for each treatment day.

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Background: Shear wave speed (SWS), shear wave dispersion (SWD), and attenuation imaging (ATI) are new diagnostic parameters for non-alcoholic fatty liver disease. To differentiate between non-alcoholic steatohepatitis (NASH) and non-alcoholic fatty liver (NAFL), we developed a clinical index we refer to as the "NASH pentagon" consisting of the 3 abovementioned parameters, body mass index (BMI), and Fib-4 index.

Aim: To investigate whether the area of the NASH pentagon we propose is useful in discriminating between NASH and NAFL.

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A 34-year-old man with poorly controlled type 2 diabetes was admitted to our hospital because of fever, headache, vomiting, and impaired consciousness. His hemoglobin A1c level was as high as 11.0%.

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Hybrid plasmas have been reported in various areas of research over the last 40 years. However, a general overview of hybrid plasmas has never been presented or reported. In the present work, a survey of the literature and patents is carried out to provide the reader with a broad view of hybrid plasmas.

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Background: Recently, robot-assisted thoracic surgery has been increasingly performed for mediastinal disease. However, appropriate postoperative analgesic methods have not been evaluated.

Methods: We retrospectively studied patients who underwent robot-assisted thoracic surgery for mediastinal disease at a single university hospital between January 2019 and December 2021.

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Objective: To evaluate Eustachian tube (ET) function after Kobayashi plug surgery based on the tympanic membrane (TM) findings and active opening (AO) of the ET assessed with sonotubometry.

Subjects And Methods: A retrospective survey of medical records identified 74 ears of 66 patients with patulous ET (PET) received transtympanic insertion of the Kobayashi plug. Excluding the six ears (6 patients) with abnormal preoperative TM, sixty-eight ears of 60 patients were found to have normal TM preoperatively.

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