Publications by authors named "Imamura C"

Introduction: Cell-free and concentrated ascites reinfusion therapy (CART) is frequently used to relieve the symptoms caused by massive ascites due to peritoneal metastasis of gastric cancer, especially in the later stages of its clinical course. Irinotecan (CPT-11) is recommended for third- or later-line chemotherapy according to gastric cancer treatment guidelines. However, the concentrations of anti-cancer drugs in the ascites and the product of CART are not well known, it is considered that some amounts of anti-cancer drugs contained in the product of CART may be readministered and induce severe adverse reactions.

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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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  • - 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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  • Nausea and vomiting are frequent side effects of trastuzumab deruxtecan (T-DXd) treatment, prompting a study to evaluate an olanzapine-based regimen to prevent these symptoms in breast cancer patients.
  • A phase II clinical trial involved 168 patients with HER2-positive metastatic breast cancer; results showed a significantly higher complete response rate in the group receiving olanzapine compared to placebo (70% vs. 56.1%) during the delayed phase.
  • The olanzapine group also experienced a higher rate of no nausea and reported better outcomes regarding appetite loss, indicating its effectiveness in managing side effects related to T-DXd treatment.*
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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: In older patients, esophageal squamous cell carcinoma (ESCC) is difficult to treat using standard therapies, including surgery and cisplatin-based chemoradiotherapy. Paclitaxel (PTX) has radiosensitizing activity. We conducted a phase I trial of PTX combined with radiotherapy to establish a standard therapy for locally advanced ESCC in older patients.

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  • - 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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  • 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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Background: Hormone receptor (HR)-positive breast cancer is a disease for which no immune checkpoint inhibitors have shown promise as effective therapies. Cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitors synergistically increased the effectiveness of antiprogrammed cell death protein-1 (anti-PD-1)/programmed death-ligand 1 (PD-L1) antibodies in preclinical studies.

Methods: This non-randomized, multicohort, phase II study evaluated the efficacy and safety of the anti-PD-1 antibody nivolumab 240 mg administered every 2 weeks in combination with the CDK4/6 inhibitor abemaciclib 150 mg twice daily and either fulvestrant (FUL) or letrozole (LET) as a first-line or second-line treatment for HR-positive HER2-negative metastatic breast cancer.

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Uridine diphosphate glucuronosyltransferases (UGTs) are highly expressed in the liver and are involved in the metabolism of many drugs. In particular, UGT1A1 has a genetic polymorphism that causes decreased activity, leading to drug-induced hepatotoxicity. Therefore, an evaluation system that accurately predicts the kinetics of drugs involving UGT1A1 is required.

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  • The aging population is leading to an increase in older cancer patients, and while geriatric assessment (GA) is recognized as valuable, there is no clear consensus on its effectiveness.
  • A literature search showed that GA or comprehensive GA (CGA) can lead to a weak recommendation for use in elderly cancer patients undergoing chemotherapy, with benefits such as reduced adverse events and improved quality of life.
  • Despite needing more resources, GA/CGA is considered safe for patients, prompting suggestions to enhance training and staffing for better implementation in clinical settings.
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  • The study investigates the effectiveness of olanzapine in managing nausea and vomiting in breast cancer patients receiving trastuzumab deruxtecan (T-DXd), which are common side effects of the treatment.
  • It is a multicenter, placebo-controlled, double-blind phase II trial involving at least 156 patients, measuring their symptoms over 22 days to determine the complete response rate for nausea and vomiting.
  • Approved by relevant ethics boards, the findings will be shared at conferences and published in scientific journals to contribute to broader cancer treatment knowledge.
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  • The study aimed to assess how the effectiveness of erlotinib treatment relates to the levels of both total and unbound erlotinib in patients with non-small cell lung cancer (NSCLC) who have specific EGFR mutations.
  • A total of 70 patients were enrolled, with 61 possessing EGFR-activating mutations, and findings showed that exposure levels did not correlate with progression-free survival (PFS), which had a median of 10.9 months.
  • The analysis indicated that skin toxicity was linked to higher total drug concentrations, but despite variability in patient responses, the standard erlotinib dose of 150 mg/day remains effective for treating NSCLC with the identified mutations.
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We created an indoor forest bathing environment in a sunlight-type environmentally controlled chamber and both physiological and psychological measurements were conducted for the evaluation of mental fatigue reduction. At first, a working memory load experiment was performed among 10 participants in a space without plants to identify an indicator correlating with feelings of fatigue, using the cerebral activity of the prefrontal cortex. Then, the indicator was used to evaluate whether a 20-min exposure to an indoor forest bathing environment reduced the level of the feeling of fatigue.

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Background: The aim of this study was to evaluate clinical validity of the S-1 dosage formula based on body surface area (BSA) and creatinine clearance (CLcr) to achieve the target area under the concentration-time curve of 5-FU, which we had developed and refined in each prospective pharmacokinetic study.

Methods: The recommended dose determined by the refined formula was assessed using data of the SPIRITS (S-1 vs. S-1 plus cisplatin [SP]) and the G-SOX (SP vs.

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Patients with NSCLC in East Asia, including Japan, frequently contain mutations. In 2018, we published the latest full clinical practice guidelines on the basis of those provided by the Japanese Lung Cancer Society Guidelines Committee. The purpose of this study was to update those recommendations, especially for the treatment of metastatic or recurrent -mutated NSCLC.

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Introduction: Immune checkpoint inhibitors (ICIs), particularly anti-PD-1 antibody, have dramatically changed cancer treatment; however, fatal immune-related adverse events (irAEs) can develop. Here, we describe a severe case of sclerosing cholangitis-like irAE. We report the use of 3 immunosuppressive agents that resulted in the death of the patient due to treatment inefficacy.

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Hierarchical structures which lie hidden between human complex conditions and reproductivity cannot be simple, and trends of each population component does not necessarily pertain to evolutionary theories. As an illustration, the fitness of individuals with heritable extreme conditions can be low across continuing generations in observational data. Autism and schizophrenia are characterized by such evolutionary paradox of survival and hypo-reproductivity in the complex human diversity.

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Background: Afatinib is a second-generation epidermal growth factor receptor () tyrosine kinase inhibitor (TKI). Combination therapies with first-generation EGFR-TKIs and bevacizumab have been reported to prolong progression-free survival (PFS). However, there are few data on the combination of afatinib and bevacizumab.

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In patients with impaired renal function, S-1-related toxicities increase due to higher exposure of 5-fluorouracil (5-FU). Our previous pharmacokinetic study in 16 cancer patients with various renal functions developed an S-1 dosage formula based on individual creatinine clearance (CLcr) and body surface area (BSA). To evaluate and refine the formula, this prospective study was conducted.

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Bosutinib is a second-generation tyrosine kinase inhibitor indicated for treatment of chronic myeloid leukemia (CML) in adult patients. The safety and efficacy of bosutinib in patients younger than 18 years of age have not been established. We here report the case of a 4-year-old male with CML who was treated with bosutinib during coordination of human leukocyte antigen-matched unrelated bone-marrow transplantation because of insufficient responses to imatinib and dasatinib.

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Patients with cancer should appropriately receive antiemetic therapies against chemotherapy-induced nausea and vomiting (CINV). Antiemetic guidelines play an important role in managing CINV. Accordingly, the first Japanese antiemetic guideline published in 2010 by the Japan Society of Clinical Oncology (JSCO) has considerably aided Japanese medical staff in providing antiemetic therapies across chemotherapy clinics.

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  • Ramucirumab (RAM) combined with weekly paclitaxel (wPTX) is a common second-line treatment for advanced gastric cancer, but the ABSOLUTE trial showed that weekly nanoparticle albumin-bound paclitaxel (w-nab-PTX) is equally effective in terms of overall survival.
  • This study, known as the P-SELECT trial, aims to determine if w-nab-PTX plus RAM is more effective than wPTX plus RAM for patients with peritoneal dissemination of gastric cancer.
  • The trial is a phase II study enrolling 105 patients, comparing the two treatment regimens, with the primary focus on overall survival and key secondary outcomes like progression-free survival and quality of life
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