Publications by authors named "Hosokawa A"

Cell-free DNA (cfDNA) is present in healthy individuals but is elevated in those undergoing physical exertion, trauma, sepsis, and certain cancers. Maintaining cfDNA concentrations is vital for immune homeostasis and preventing inflammatory responses. Understanding cfDNA release and clearance is essential for using cfDNA as a biomarker in clinical diagnostics.

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Background: S-1 monotherapy had previously been widely used as a second-line treatment for pancreatic cancer (PC) after gemcitabine-based chemotherapy mainly in Japan. Based on the results of the NAPOLI-1 trial, the recommended second-line therapy is now liposomal irinotecan plus fluorouracil/folinic acid (nal-IRI + 5-FU/LV). However, there have been no studies comparing nal-IRI + 5-FU/LV therapy with S-1 monotherapy.

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Introduction: Fluorouracil, leucovorin, irinotecan, and oxaliplatin (FOLFIRINOX) improve overall survival (OS) and progression-free survival (PFS) in patients with pancreatic cancer, compared with gemcitabine (GEM). However, whether PFS is a surrogate marker of OS in pancreatic cancer chemotherapy focusing on FOLFIRINOX or GEM plus nab-paclitaxel remains unknown. We aimed to verify whether PFS can be a surrogate marker of OS in prognosis prediction.

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  • Pembrolizumab, nivolumab, and the combination therapies have emerged as first-line treatments for advanced esophageal cancer, although their efficacy on primary tumors was previously unclear.
  • In a study of 23 patients experiencing esophageal dysphagia, significant improvement in swallowing was noted in 82.6%, with a median time to improvement of about 26 days.
  • While 10 patients experienced immune-related adverse events, the treatments provided high response rates and prolonged survival, indicating promising effectiveness against primary tumors.
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  • Immune checkpoint inhibitors, such as pembrolizumab, have shown effectiveness in treating metastatic colorectal cancer (CRC) with microsatellite instability-high (MSI-H), though liver metastasis often indicates resistance to these therapies.
  • A case study focuses on a 23-year-old man with MSI-H colorectal liver metastasis who achieved a complete pathological response after receiving pembrolizumab following chemotherapy.
  • Pathological analyses revealed high PD-L1 expression in both the primary tumor and regional lymph nodes, suggesting that examining lymph nodes could help predict responses to anti-PD-1/PD-L1 therapies in cancer treatment.
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Developmental and epileptic encephalopathies (DEEs) feature altered brain development, developmental delay and seizures, with seizures exacerbating developmental delay. Here we identify a cohort with biallelic variants in DENND5A, encoding a membrane trafficking protein, and develop animal models with phenotypes like the human syndrome. We demonstrate that DENND5A interacts with Pals1/MUPP1, components of the Crumbs apical polarity complex required for symmetrical division of neural progenitor cells.

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  • - This study compared the effectiveness of second-line treatments for patients with unresectable pancreatic cancer who previously received gemcitabine plus nab-paclitaxel (GnP), analyzing 318 patients treated with nanoliposomal irinotecan plus 5-fluorouracil/folinic acid (NFF), S-1, or FOLFIRINOX.
  • - Results showed that the median overall survival (OS) for the NFF group was significantly better at 9.08 months compared to 4.90 months for S-1, while FOLFIRINOX had an OS of 4.77 months with no significant difference from NFF.
  • - Factors like serum levels and duration
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  • The study focused on the detection of unauthorized GM papayas, specifically the PRSV-YK line, using two types of real-time PCR reagents (TaqMan Gene and FastGene) and different PCR instruments.
  • It found that using TaqMan Gene with certain PCR systems sometimes led to high threshold cycle (Cq) values, raising concerns about false negatives in detection tests for GM papaya lines.
  • The researchers concluded that for accurate detection of PRSV-YK and PRSV-SC, FastGene polymerase is recommended over TaqMan Gene when using ABI7500 or QS12K systems to minimize the risk of false negatives, especially at low concentrations.
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Mysids are small crustaceans that are closely related to shrimp/prawns and crabs but not subject to food allergen labeling requirements for raw materials. In the past, a processed food that contained Japanese smelt (wakasagi) was suspected of producing a false-positive result in shrimp/prawn and crab allergen test because of the presence of consumed mysids. However, there was no reported methods to confirm mysid presence.

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Background: Pimitespib (TAS-116), a first-in-class, oral, selective heat-shock protein 90 inhibitor, is approved as fourth-line treatment for gastrointestinal stromal tumors in Japan. This phase 1 study evaluated the cardiac safety of pimitespib.

Methods: In this open-label, nonrandomized, multicenter study, Japanese patients (aged ≥20 years) with refractory, advanced solid tumors received placebo on day -1, then pimitespib 160 mg daily on days 1-5 of the cardiac safety evaluation period.

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  • The study evaluated the effectiveness of definitive chemoradiotherapy (dCRT) as a method to preserve organs in patients with esophageal squamous cell carcinoma (ESCC) who showed a significant response to induction chemotherapy.
  • Eligible patients received 3 cycles of a chemotherapy regimen followed by dCRT if they were downstaged to stage IA, with the main goal of achieving high 1-year progression-free survival rates.
  • Results showed that 58.4% of patients had a remarkable response, with 89.8% achieving complete response after dCRT; the study reported a 1-year progression-free survival of 89.8% and a 3-year overall survival of 83.7% during follow-up.
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Introduction: This study examined whether visuospatial perspective uses the character perspective during narrative comprehension.

Method: Participants read narrative stimuli depicting the spatial positional relationships between characters and objects and judged whether the objects were on the left or right from the character's perspective. We manipulated whether the spatial positional relationships between characters depicted in the narrative stimuli resulted in a visuospatial perspective.

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Nanoliposomal irinotecan with fluorouracil and folinic acid (NFF) is a standard regimen after gemcitabine-based therapy for patients with unresectable or recurrent pancreatic cancer. However, there are limited clinical data on its efficacy and safety in the real-world. We therefore initiated a retrospective and prospective observational study (NAPOLEON-2).

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A 59-year-old man had developed visual abnormality, nausea, headache, and weight loss since three months before. The ophthalmologist found severe optic disc edema in both eyes, and referred him to our hospital. The patient had mild cerebellar ataxia.

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Background: Immunoglobulin (Ig)G4-related disease affects nearly every organ, and its clinical course varies depending on the involved organ; however, its occurrence in the mediastinum is rarely reported.

Case Presentation: A 58-year-old woman presented with a posterior mediastinal tumor along the thoracic spine on imaging. Based on her elevated serum IgG4 level of 349.

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  • No reliable marker for predicting peritoneal metastasis during chemotherapy for advanced gastric cancer (AGC) currently exists, which complicates treatment effectiveness.
  • A study examining 73 AGC patients receiving TAX/RAM therapy found that elevated serum CA125 levels were significantly associated with the presence of peritoneal metastasis, with 80.6% of patients showing increased CA125 levels having this condition.
  • The study concluded that monitoring CA125 kinetics can serve as an early indicator of peritoneal metastasis progress in patients undergoing this chemotherapy regimen.
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  • * The patient's double vision was due to a rare condition called a pure orbital floor blow-in fracture (BIF), which showed significantly limited eye movement upon examination.
  • * After two weeks of monitoring with no improvement, surgery was performed to remove the bone fragment, resulting in a resolution of symptoms and positive outcomes in follow-up exams.
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Developmental and epileptic encephalopathies (DEEs) are a heterogenous group of epilepsies in which altered brain development leads to developmental delay and seizures, with the epileptic activity further negatively impacting neurodevelopment. Identifying the underlying cause of DEEs is essential for progress toward precision therapies. Here we describe a group of individuals with biallelic variants in and determine that variant type is correlated with disease severity.

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  • * A retrospective study from December 2021 to June 2023 analyzed 106 AGC patients, focusing on those with severe peritoneal metastasis who received nivolumab plus mFOLFOX6, finding that 19.8% of patients had severe cases.
  • * Results showed a median progression-free survival of 7.4 months and median overall survival of 10.7 months, with notable improvements in symptoms for a number of patients; however, some experienced significant
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Background: The manubrium and body of the sternum are connected by the manubrium-sternum joint (MSJ). In performing the Nuss procedure for pectus excavatum patients, the body of the sternum is elevated as the operator flips correction bars upside down. Theoretically, the presence of the MSJ should allow elevation of the sternum body.

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Background: Severing part of the thorax prior to bar placement is effective to improve outcomes in performing the Nuss procedure for asymmetric pectus excavatum. This study aims to elucidate the patterns of severing to provide an ideal outcome.

Methods: Three-dimensional biomechanical computer models were produced simulating the thoraxes of 10 actual patients with asymmetric pectus excavatum.

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  • Scientists studied how the bacteria in our guts work with our bodies to affect our health, focusing on Japanese people.
  • They found links between certain genes and specific types of gut bacteria, like Bacteroides intestinalis, which might influence body functions.
  • Their research also connects gut bacteria to things we have in our blood, like bile acids, which could help us understand how different people's bodies react differently to food and health.
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  • Artificial photosynthesis has the potential to address environmental issues like global warming and fossil fuel depletion by converting CO2 into useful chemicals.
  • Recent research has focused on self-photosensitizing catalysts that combine the functions of photosensitization and catalysis, which simplifies electron transfer processes.
  • A newly synthesized dinuclear Ru complex has shown remarkable durability and efficiency in CO reduction, achieving a high turnover number of 2400 over 26 hours and a quantum yield of 19.7%, even at low CO concentrations.
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  • Immune checkpoint inhibitors (ICIs) show varying effectiveness depending on the metastatic site in gastric cancer (GC), influencing patient survival outcomes.
  • In a study of 148 GC patients treated with ICIs, those with non-systemic progression lived significantly longer than those with systemic progression, indicating different responses based on tumor growth patterns.
  • Liver metastasis was found to be particularly detrimental, correlating with lower CD8+ T-cell density and worse survival, suggesting that it may predict systemic progression in GC patients receiving ICIs.
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