Publications by authors named "Osamu Muto"

Although Kirsten rat sarcoma virus (KRAS) G12C inhibitors alter the treatment strategy for patients with KRAS G12C-mutant lung cancer, their efficacy remains insufficient to eliminate tumors. Here, we identify that inhibition of mutant KRAS promotes escape from macrophage phagocytosis by upregulating the expression of cluster of differentiation 47 (CD47) and CD24. These proteins are induced by the binding of FOXA1 to the super-enhancer of CD47 and grainyhead-like transcription factor 2 (GRHL2) to the promoter of CD24, respectively.

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Summary: Dynamic gene expression is controlled by transcriptional and post-transcriptional regulation. Recent studies on transcriptional bursting and buffering have increasingly highlighted the dynamic gene regulatory mechanisms. However, direct measurement techniques still face various constraints and require complementary methodologies, which are both comprehensive and versatile.

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Background: Precise implant positioning during total hip arthroplasty (THA) is an important factor influencing dislocation rate and long-term implant survival. Although a special carbon fiber traction table for THA improves the accuracy of implant positioning, it is too expensive. We aimed to report the accuracy of cup positioning and complication rate in patients undergoing THA via the direct anterior approach using a conventional noncarbon fiber traction table, which is generally used for osteosynthesis of femoral fractures.

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Aim: To evaluate the feasibility and safety of total neoadjuvant therapy with long-course chemoradiotherapy followed by consolidation chemotherapy in Japanese patients with locally advanced rectal cancer.

Methods: This prospective, multicenter, single-arm, phase II trial was conducted at 10 centers. The eligibility criteria included age ≥20 y, locally advanced rectal cancer within 12 cm of the anal verge, and cT3-4N0M or TanyN+M0 at diagnosis, enabling curative resection.

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Article Synopsis
  • Vaccine protection against SARS-CoV-2 relies on T cells and neutralizing antibodies, and a new antigen delivery system called pullulan nanogel (PNG) enhances the induction of CD8 T cells.
  • PNG selectively targets medullary macrophages by binding to the C-type lectin SIGN-R1, which is crucial for effective vaccine delivery.
  • In mouse models, vaccinations with PNG-encapsulated spikes reduced viral load and improved survival, emphasizing that even low-frequency specific CD8 T cells significantly contribute to clearing the virus and improving vaccine effectiveness.
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Aflibercept (AFL) plus FOLFIRI prolongs overall survival (OS) in patients with metastatic colorectal cancer (mCRC). However, there is limited evidence on the efficacy and safety of AFL plus FOLFIRI previously treated with anti-epidermal growth factor receptor (EGFR) agents. Therefore, we conducted a prospective open-label phase II trial evaluating the efficacy and safety of AFL plus FOLFIRI in Japanese patients with mCRC failing a prior oxaliplatin-based chemotherapy plus an anti-EGFR agent.

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Objective: The incidence of periprosthetic fractures after total hip arthroplasty using a short tapered-wedge stem is high. Callus formation preceding this fracture, which indicates postoperative stress fracture around the stem, has been reported. However, previous studies on postoperative callus are limited.

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  • A study was conducted to evaluate the effectiveness and safety of Capecitabine plus oxaliplatin (CapeOX) as a first-line treatment for advanced gastric cancer in patients aged 70 years and older.
  • The trial included 108 chemotherapy-naive patients, who were given either the original or reduced doses of CapeOX, with overall survival (OS) being the primary measurement.
  • Results showed a median OS of 12.9 months, with some patients experiencing significant side effects, mainly neutropenia and anemia, indicating that CapeOX is a viable treatment option for older patients with advanced gastric cancer.
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Background: Accurate identification of the cricothyroid membrane is crucial for successful cricothyrotomy; however, a manoeuvre that helps identify it both accurately and quickly remains unclear. The effectiveness of the so-called 'bottom-up manoeuvre' has never been investigated. This study aimed to examine whether the bottom-up manoeuvre is as rapid and accurate as the conventional 'top-down manoeuvre' at identifying the cricothyroid membrane.

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The effects of gene polymorphisms or prior irinotecan treatment on treatment outcomes of nanoliposomal-irinotecan plus 5-fluorouracil/leucovorin (nal-IRI+5-FU/LV) in patients with unresectable pancreatic ductal adenocarcinoma (PDAC) are not established. This multicenter, retrospective cohort study compared treatment outcomes in patients with and those with or genotypes. We also analyzed the impact of prior irinotecan treatment on survival outcomes in 54 patients treated with nal-IRI+5-FU/LV.

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Background: Although initial therapy with a parenteral anticoagulant is required before edoxaban, this strategy is frequently avoided in actual clinical practice because of its complexity. This study assessed the feasibility of edoxaban without initial heparin usage for asymptomatic cancer-associated thrombosis (CAT) in Japanese patients with gastrointestinal cancer (GIC) at high risk of bleeding.

Methods: In this multicenter prospective feasibility study conducted at 10 Japanese institutions, patients with active GIC who developed accidental asymptomatic CAT during chemotherapy were recruited.

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Article Synopsis
  • The study aims to assess the safety and effectiveness of FOLFIRI combined with aflibercept (AFL) as a second-line chemotherapy for patients with metastatic colorectal cancer (mCRC) who are resistant to prior treatments involving anti-EGFR antibodies.
  • The main goal is to evaluate the 6-month progression-free survival (PFS) rate, with secondary goals including overall survival, response rates, and potential adverse effects, based on a sample size of 41 participants.
  • This research is necessary due to the lack of clinical trial data specifically for mCRC patients who have failed anti-EGFR therapy, highlighting the need for a prospective study to fill this knowledge gap.
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Background: Ramucirumab is a human IgG1 monoclonal vascular endothelial growth factor receptor-2 antibody that inhibits tumor cell growth and affects the tumor cell microenvironment. We assessed the efficacy and safety of ramucirumab plus irinotecan combination therapy as second-line treatment in patients with previously treated advanced gastric cancer.

Materials And Methods: Patients with advanced gastric cancer refractory or intolerant to primary chemotherapy were included.

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  • DNA methylation status is linked to how well patients with metastatic colorectal cancer respond to anti-EGFR treatment, highlighting its importance in drug selection.
  • A new assay was developed to classify patients as having high or low methylated colorectal cancer, using data from a large group of patients.
  • Results indicated that patients with high methylation status had significantly worse clinical outcomes compared to those with low methylation, making DNA methylation an independent and valuable biomarker for predicting treatment response.
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Background: Angiogenesis inhibitors (AIs) combination with cytotoxic chemotherapy is a promising treatment for patients with colorectal cancer (CRC). Aflibercept (AFL) is an option for second-line treatment of CRC, according to the 'VELOUR' trial. Currently, we can choose from three AIs, including bevacizumab, ramucirumab, and AFL.

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Background Adolescent idiopathic scoliosis (AIS) is a potentially progressive deformity, and early detection is crucial for timely intervention. However, the methods and criteria justifying screening for pediatric scoliosis remain controversial. We have, therefore, independently developed a Digital Moiré (DM) as a tool for scoliosis screening.

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A 26-year-old man was admitted to our hospital due to upper abdominal pain. He had previously been diagnosed with gastroduodenal ulcer at 23 and 25 years old and had been treated with proton-pump inhibitors. Endoscopic hemostasis and a biopsy were performed on the hemorrhagic gastroduodenal ulcers.

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Desmoplastic small round cell tumor (DSRCT) is a rare aggressive malignant tumor. It is a refractory tumor and the median overall survival is very short. We report two autopsy cases of DSRCT, both of which were already advanced and metastasized at the first medical examination.

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Immune checkpoint inhibitors may have different clinical effects compared with conventional anticancer drugs. An 85-year-old male received chemotherapy for recurrent gastric cancer. As liver metastasis progressed, nivolumab was introduced as a fourth line treatment.

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A 32-year-old woman was found to have a gastric adenocarcinoma with multiple bone metastases. Chemotherapy in the first, second and third-line was not effective. Blood examinations showed disseminated intravascular coagulation(DIC)at the end of the second-line chemotherapy.

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Glioblastoma (GBM) is the most lethal and aggressive adult brain tumor, requiring the development of efficacious therapeutics. Towards this goal, we screened five genetically distinct patient-derived brain-tumor initiating cell lines (BTIC) with a unique collection of small molecule epigenetic modulators from the Structural Genomics Consortium (SGC). We identified multiple hits that inhibited the growth of BTICs in vitro, and further evaluated the therapeutic potential of EZH2 and HDAC inhibitors due to the high relevance of these targets for GBM.

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Article Synopsis
  • A patient with advanced colon cancer experiencing thrombocytopenia from oxaliplatin chemotherapy underwent mild partial splenic embolization (PSE).
  • This procedure helped manage the low platelet count caused by splenomegaly, allowing the patient to continue with systemic chemotherapy.
  • The case suggests that mild PSE could be a beneficial option for cancer patients facing similar issues, broadening their treatment possibilities.
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Purpose: To evaluate the safety and efficacy of a modified administration schedule of docetaxel, cisplatin, and fluorouracil (mDCF)in patients with advanced gastric cancer with gastrointestinal stenosis in clinical practice.

Methods: In the chemotherapy-naïve patients who had metastatic or recurrent histologically confirmed gastric cancer, docetaxel(40mg/m2), levofolinate(200mg/m / / / 2), fluorouracil(400mg/m2)on day 1, fluorouracil 1,000 mg/m2d-2 days intravenous continuous in fusion beginning on day 1, and cisplatin(40mg/m2)on day 3 was administered every 2 weeks.

Results: Six patients received mDCF therapy.

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