Publications by authors named "Okita K"

Article Synopsis
  • Pancreatic ductal adenocarcinomas (PDAC) are highly aggressive and lack effective treatments; this study examines potential new therapies using rat monoclonal antibodies (mAbs) targeting specific membrane proteins.
  • Key membrane proteins such as HER1-4, MET, S1PR1, LAT1, and CD44v are frequently expressed in PDAC, and targeting them with mAbs demonstrated growth inhibition in various cancer cell lines.
  • High levels of CD44v in PDAC correlate with poor patient prognosis, indicating that targeting CD44v and related proteins could provide new diagnostic and therapeutic avenues for treating this aggressive cancer.
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Influenza virus, adenovirus, and respiratory syncytial virus cause major respiratory infections. These infections have similar initial symptoms making it difficult to differentiate them based on symptoms alone. PCR is currently used as the standard diagnostic test for these infections, however, it has its limitations such as non-specific and false-negative amplifications, high cost, and the inability to distinguish between a live or dead virus.

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  • Plants under low oxygen conditions can produce more active phytochemicals, like kaempferol from highland quinoa, which may enhance metabolism and energy production.
  • A study involving 13 male university athletes tested whether a single 10 mg dose of kaempferol could improve performance during two 400-m runs, comparing results to a placebo.
  • While kaempferol didn’t significantly change race times, it notably lowered heart and respiratory rates and reduced markers of muscle damage, indicating it may help athletes during intense exercise.
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  • Olanzapine is an atypical antipsychotic that helps prevent nausea and vomiting, particularly after highly emetogenic chemotherapy (HEC), but it can cause side effects like hyperglycemia and drowsiness.
  • A systematic review and meta-analysis assessed the effectiveness of olanzapine combined with standard triplet antiemetic therapy compared to triplet therapy alone, focusing on outcomes like nausea control and adverse effects.
  • Results showed that adding olanzapine significantly improved nausea and vomiting prevention in both acute and delayed phases with minimal adverse effects, indicating it can be beneficial for patients undergoing HEC.
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  • Research lacks a standardized multi-day antiemetic regimen for chemotherapy, making it difficult to assess efficacy and safety.
  • A comprehensive search revealed no direct comparisons between multi-day and single-day antiemetic regimens, with variations in study quality and treatment protocols hindering robust analysis.
  • Preliminary findings indicate that three-drug combination therapies, particularly using aprepitant, may outperform two-drug regimens; further research is needed to better define antiemetic approaches for multi-day chemotherapy.
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  • Palonosetron is a second-generation anti-nausea drug that might be more effective than first-generation medications, and this study explores how dexamethasone (DEX) works with it during chemotherapy.
  • Researchers compared the effects of giving DEX for 1 day versus 3 days in preventing nausea and vomiting after moderately emetogenic chemotherapy (MEC), using data from studies published between 1990 and 2020.
  • The findings showed that while the 3-day DEX group had a higher rate of no vomiting, there were no major differences in most anti-nausea effects, suggesting that DEX treatment could be shortened to just 1 day when paired with palonosetron.
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To understand the physiological mechanisms by which pituitary-derived gonadotropins (Gths), follicle-stimulating hormone (Fsh) and luteinizing hormone (Lh) regulate asynchronous oocyte development, we investigated the function and expression of Fsh and Lh receptors (Fshr and Lhr, respectively) in Pacific bluefin tuna (PBT, Thunnus orientalis). As a first, we cloned the full-length cDNAs encoding PBT Fshr and Lhr. Recombinant PBT Fsh and Lh single-chain proteins were produced in abundance using stable CHO-DG44 cell lines and were subsequently purified from the culture medium, culminating in their yields being 87.

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Article Synopsis
  • - The study focuses on the effectiveness and safety of dexamethasone-sparing antiemetic therapies, particularly neurokinin-1 antagonists (NKRA), for preventing chemotherapy-induced nausea and vomiting (CINV) in patients undergoing highly emetogenic chemotherapy (HEC).
  • - A systematic review of literature identified and analyzed two studies involving anthracycline-cyclophosphamide and cisplatin-based regimens; while no significant differences in vomiting prevention were found, some outcomes related to nausea showed variability.
  • - The review concludes that dexamethasone-sparing antiemetic therapies can be effective in preventing CINV for HEC, particularly in patients receiving anthracycline-cyclophosphamide
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The interim analysis of the CIRCULATE-Japan GALAXY observational study demonstrated the association of circulating tumor DNA (ctDNA)-based molecular residual disease (MRD) detection with recurrence risk and benefit from adjuvant chemotherapy (ACT) in resectable colorectal cancer (CRC). This updated analysis with a 23-month median follow-up, including 2,240 patients with stage II-III colon cancer or stage IV CRC, reinforces the prognostic value of ctDNA positivity during the MRD window with significantly inferior disease-free survival (DFS; hazard ratio (HR): 11.99, P < 0.

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  • Chemotherapy-induced nausea and vomiting (CINV) negatively impacts patient quality of life, leading to a study that evaluated the effectiveness of adding neurokinin-1 receptor antagonists (NK1RAs) to existing antiemetic treatments for patients undergoing moderately emetogenic chemotherapy (MEC).
  • A systematic review of clinical studies identified 15 randomized controlled trials involving over 4,400 patients, revealing that triplet antiemetic regimens including NK1RAs significantly improved complete response and complete control of nausea compared to doublet regimens, without increasing adverse events.
  • While the addition of NK1RA shows promise for enhancing antiemetic efficacy in carboplatin-based chemotherapy, further research is needed
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Background: With the advent of multiplex polymerase chain reaction (PCR) using samples from a positive blood culture, the time required to identify a pathogen has significantly shortened to a few hours. It can help us select appropriate antimicrobial agents more quickly. The present study aimed to assess the impact of using a multiplex PCR blood culture panel on the appropriate administration of antimicrobial agents.

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Triploidization influences various biological characteristics of fish, which is associated with reductions in the number of multiple cell types in different tissues/organs. Our behavioral analyses revealed that triploid Pacific bluefin tuna (Thunnus orientalis) larvae exhibit lower sensitivity to light compared to diploids. Furthermore, histological analyses revealed a reduction in the number of ganglion cells and an increase in their size in the retinas of triploid T.

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In Japan, the landscape of clinical practice for substance use disorder is changing significantly, primarily due to an increase in patients using over-the-counter drugs. A major concern is the rising number of patients misusing dextromethorphan (DXM). These patients with DXM use disorders often have severe trauma-related and mood symptoms, and therefore try to cope with those symptoms by self-medicating with DXM.

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Rationale: Treatment strategies for rectal squamous cell carcinoma (rSCC) are yet to be established, given its rarity. Although squamous cell carcinoma has been reported to be highly sensitive to cetuximab and radiation, there is no report of combination therapy of cetuximab and radiation for rSCC. In this study, we firstly reported a case of rSCC in which a complete response was achieved with the original chemoradiotherapy comprising oxaliplatin, S-1, cetuximab, and simultaneous radiation.

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Article Synopsis
  • - The Japan Society of Clinical Oncology updated its 2023 Clinical Practice Guidelines for Antiemesis to incorporate recent findings on antiemetics and cancer treatments, reflecting the latest advancements in the field
  • - A thorough literature search from 1990 to 2020 was conducted to guide the update, leading to the development of 13 background questions, 12 clinical questions, and three future research questions
  • - The updated guidelines aim to enhance understanding and decision-making about antiemetic therapy for both patients and healthcare providers
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Article Synopsis
  • The study evaluated the effectiveness of non-drug therapies for managing anticipatory chemotherapy-induced nausea and vomiting (CINV) in cancer patients, focusing on the impact of past chemotherapy experiences.
  • Out of 107 studies reviewed, six were suitable for inclusion, highlighting three key non-pharmacologic treatments: systematic desensitization, hypnotherapy, and yoga therapy; systematic desensitization showed significant positive results in reducing nausea and vomiting.
  • Despite promising findings for systematic desensitization, concerns about study quality and inconsistent reporting of side effects indicate a need for more rigorous research before these methods are widely adopted in clinical practice.
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Photoexcitation of a solute alters the solute-solvent interaction, resulting in the nonequilibrium relaxation of the solvation structure, often called a dynamic Stokes shift or solvation dynamics. Thanks to the local nature of the solute-solvent interaction, the characteristics of the local solvent environment dissolving the solute can be captured by the observation of this process. Recently, we derived the energy-represented Smoluchowski-Vlasov (ERSV) equation, a diffusion equation for molecular liquids, which can be used to analyze the solvation dynamics on the diffusion timescale.

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Aim: To investigate changes in the clinical characteristics of patients who abused benzodiazepine receptor agonists (BZRA) or over-the-counter (OTC) drugs before and after COVID-19 based on the 2018 and 2022 data of the "Nationwide Psychiatric Hospital (NPH) Survey on Drug-related Psychiatric Disorders."

Method: A total of 446 and 155 cases, and 435 and 273 cases, who mainly abused BZRAs or OTC drugs, respectively, were extracted from the database of the two NPH Surveys. Demographic variables, education, employment, criminal record, drug use during the previous year, psychiatric diagnosis, and types of abused drugs were compared between 2018 and 2022.

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Background: The benefits of novel androgen receptor axis-targeted agents (ARATs) on oncological outcomes in patients with non-metastatic castration-resistant prostate cancer (nmCRPC) in real-world settings are unclear.

Methods: This multi-institutional retrospective study included 178 patients with nmCRPC treated between September 2003 and August 2022. Patients were divided into two groups: those who were treated with any novel ARATs, including apalutamide, enzalutamide, darolutamide, and abiraterone acetate, during any line of nmCRPC treatment (novel ARATs group) and those who were not (control group).

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Aim: The aim of this study was to verify the clinical feasibility of tele-proctoring using our ultra-low latency communication system with shared internet access.

Methods: Connections between two multiple remote locations at various distances were established through the TELEPRO® tele-proctoring system. The server records the latency between the two locations for tele-proctoring using the annotations.

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Objectives: Medicinal herbs are plants with potential medicinal and health benefits. In recent years, they are being increasingly used as a treatment alternative owing to their effectiveness against various diseases. In this study, we investigated the inhibitory effects of 15 medicinal herbs on causative bacteria for dental caries and periodontal disease.

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Recent regenerative studies using human pluripotent stem cells (hPSCs) have developed multiple kidney-lineage cells and organoids. However, to further form functional segments of the kidney, interactions of epithelial and interstitial cells are required. Here we describe a selective differentiation of renal interstitial progenitor-like cells (IPLCs) from human induced pluripotent stem cells (hiPSCs) by modifying our previous induction method for nephron progenitor cells (NPCs) and analyzing mouse embryonic interstitial progenitor cell (IPC) development.

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