Publications by authors named "Hitoshi Yoshida"

Objectives: Esophagogastroduodenoscopy (EGD) is widely used for gastric cancer (GC) screening in Japan; however, sedation during EGD is not recommended. We aimed to assess the tolerability of unsedated EGD (USEGD) in the Japanese population.

Methods: Participants who underwent GC screening in Japanese urban areas between July 2021 and December 2022 were included in this study.

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Background And Aims: Liver fibrosis is a common adverse prognostic factor in various liver conditions. Medium-chain fatty acids (MCFAs), unique fatty acids transported directly to the liver, undergo rapid metabolism, providing energy to hepatocytes and acting as signalling molecules that mediate diverse cellular functions. Nonetheless, the precise impact of MCFAs on the pathogenesis of liver fibrosis remains incompletely understood.

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Background And Aims: Flexible GI endoscopy has been applied in the field of gynecology. GI endoscopy is useful in diagnosing uterine cervical cancers, because high-resolution imaging using magnification enables targeted biopsies. Moreover, hemostasis for uterine cancer using GI endoscopy and hemostatic forceps, as well as the local treatment of vaginal intraepithelial neoplasia, have been achieved.

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Severe constipation can cause ischemic bowel disease and other complications in older adults. However, its association with the formation of prostate abscesses has rarely been reported. An 80-year-old male recently presented to our center with syncope, dehydration, and constipation.

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Background: A new circulating biomarker superior to carbohydrate antigen 19-9 (CA19-9) is needed for diagnosing pancreatobiliary cancer (PBca). The aim of this study was to identify serum microRNA (miRNA) signatures comprising reproducible and disease-related miRNAs.

Methods: This multicenter study involved patients with treatment-naïve PBca and healthy participants.

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Article Synopsis
  • Kampo medicine can lead to severe liver injury, as shown in a case where a 29-year-old woman experienced this after taking Saibokuto, requiring steroid treatment for recovery.
  • A systematic review identified 37 cases of drug-induced liver injury linked to Kampo medicines, with 65.9% specifically associated with the ingredient Scutellariae radix.
  • The findings suggest important liver function monitoring within the first two months of taking Kampo medicines with Scutellariae radix due to the potential for liver damage.
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Background/aim: Nab-paclitaxel is used to treat patients with pancreatic cancer. However, it frequently induces peripheral neuropathy. Notably, pharmacokinetic factors may be associated with neuropathic symptoms as the onset depends on the cumulative dose.

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  • Chronic liver diseases, such as metabolic dysfunction-associated steatohepatitis (MASH), are increasingly prevalent and linked to severe fibrosis, yet effective treatments are lacking.
  • The study explored the role of the protein hydrogen peroxide-inducible clone-5 (Hic-5) in liver fibrosis and its expression in human tissues, particularly in relation to MASH, while also testing therapeutic antisense oligonucleotides (ASOs) targeting Hic-5 in a mouse model.
  • Results indicated that Hic-5 is significantly associated with the progression of liver fibrosis and that ASOs can effectively reduce Hic-5 expression, providing a potential therapeutic strategy for advanced liver diseases.
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The progress of endoscopic diagnosis and treatment for inflammatory diseases of the biliary tract and pancreas have been remarkable. Endoscopic ultrasonography (EUS) and EUS-elastography are used for the diagnosis of early chronic pancreatitis and evaluation of endocrine and exocrine function in chronic pancreatitis. Notably, extracorporeal shock wave lithotripsy and electrohydraulic shock wave lithotripsy have improved the endoscopic stone removal rate in patients for whom pancreatic stone removal is difficult.

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Background: During general anesthesia, patients with Brugada syndrome are at risk of malignant arrhythmias following worsened ST-segment elevation, potentially leading to sudden cardiac death. The protocol for safe anesthetic management of patients with Brugada syndrome has not yet been established.

Case Presentation: A 63-year-old man, diagnosed with a spontaneous Brugada type 1 pattern, was scheduled for a pleural biopsy using video-assisted thoracoscopic surgery under general anesthesia.

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Article Synopsis
  • A 75-year-old woman experienced significant symptoms like right upper abdominal pain, appetite loss, and weight loss, leading to a hospital referral due to suspected sepsis.
  • Imaging tests revealed potential metastatic tumors in her liver, lungs, and kidneys, with further examinations confirming poor carcinoma in both liver and gastric biopsies.
  • Despite efforts to treat her, the patient's condition deteriorated rapidly, resulting in her death; autopsy revealed the presence of metastatic gastric, renal, and pancreatic tumors originating from hepatocellular carcinoma (HCC), as well as a primary lung adenocarcinoma.
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In animal species that have the capability of regenerating tissues and limbs, cell proliferation is enhanced after wound healing and is essential for the reconstruction of injured tissue. Although the ability to induce cell proliferation is a common feature of such species, the molecular mechanisms that regulate the transition from wound healing to regenerative cell proliferation remain unclear. Here, we show that upon injury, InhibinβA and JunB cooperatively function for this transition during Xenopus tadpole tail regeneration.

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The inhibition of human ether-a-go-go-related gene (hERG) channels is a known cause of QT prolongation triggered by antipsychotic drugs. Our previous studies suggest that P-glycoprotein (P-gp)-mediated drug interactions may lead to increased gastrointestinal absorption of pimozide and its accumulation in cardiomyocytes, thereby enhancing the inhibitory effect of hERG channels. There is a paucity of epidemiological studies examining the risk of QT prolongation by antipsychotic drugs in terms of P-gp-mediated interactions with concomitant drugs.

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Aims: Immediate bleeding after cold snare polypectomy (CSP) for colorectal polyps might interfere with confirmation of residuals and prolong the time required for resection. We investigated whether submucosal epinephrine-added saline injection reduces the time required for the CSP procedure.

Methods: We conducted a single-center, prospective, randomized controlled trial (clinical trial registration number: UMIN000046770).

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  • This study aimed to identify factors that contribute to challenging endoscopic submucosal dissection (ESD) procedures, particularly for beginners in performing gastric ESD.
  • Over 363 superficial gastric neoplasms treated from 2015 to 2021 were analyzed, grouping operators by experience level (beginner vs. intermediate) to assess the rates of difficult ESDs.
  • Key predictors of difficult ESD included lesion location (particularly lesser curvature), size (≥20 mm), and cancerous histology, with lesser curvature being a significant challenge for both novice and intermediate operators.
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Metalloproteinases cleave transmembrane proteins that play critical roles in inflammation and cancers. Metalloproteinases include a disintegrin and metalloprotease (ADAM), which we previously examined using a fluorescence assay system, and described their association with resistance to systemic therapy in cancer patients. There are also many reports on the relation between ADAM expression and the prognosis of patients with gastroenterological chronic inflammatory diseases and cancers.

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Homeostasis is achieved by balancing cell survival and death. In cancer cells, especially those carrying driver mutations, the processes and signals that promote apoptosis are inhibited, facilitating the survival and proliferation of these dysregulated cells. Apoptosis induction is an important mechanism underlying the therapeutic efficacy of epidermal growth factor receptor (EGFR)-tyrosine kinase inhibitors (TKIs) for EGFR-mutated non-small cell lung cancer (NSCLC).

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Systemic chemotherapy has shown a significant survival benefit in patients with hepatocellular carcinoma (HCC). However, it is associated with various immune-related adverse events (irAEs). We report a case with grade 3 diarrhea and grade 2 colitis following systemic chemotherapy, successfully treated with prednisolone.

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A 44-year-old man presented to our hospital with lower gastrointestinal bleeding. We performed balloon-assisted enteroscopy, which revealed diverticulum and stricture at the ileum. The patient underwent segmental small bowel resection and diagnosed with Meckel's diverticulum.

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Although there are many reports of hemostasis with covered self-expandable metal stent (CSEMS) for bleeding from the papilla of Vater and the intrapapillary and distal bile duct, there are rare reports of its use for hemostasis in the perihilar bile duct. We report the case of a patient undergoing supportive care for perihilar cholangiocarcinoma with acute cholecystitis after side-by-side placement of uncovered SEMS for perihilar bile duct obstruction. Percutaneous transhepatic gallbladder aspiration was performed upon admission, and hematemesis occurred the next day.

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Article Synopsis
  • Osimertinib is used to treat EGFR-mutant non-small cell lung cancer (NSCLC), but its effectiveness can be compromised as cancer cells develop resistance.
  • Researchers created five resistant cell lines from NSCLC cells to study the mechanisms behind this resistance, discovering various alterations in EGFR and KRAS signaling pathways.
  • The study found distinct resistance mechanisms, including reliance on different signaling pathways and mutations, which could guide the development of new treatment approaches for NSCLC.
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The diploid anuran has emerged as a key research model in cell and developmental biology. To enhance the usefulness of this species, we developed methods for generating immortal cell lines from Nigerian strain (NXR_1018, RRID:SCR_013731) embryos. We generated 14 cell lines that were propagated for several months.

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Background: To evaluate the effect of regorafenib on soluble MHC class I polypeptide-related sequence A (MICA) (sMICA) level in vitro. In addition, we clinically examined whether its plasma levels were associated with regorafenib activity in terms of progression-free survival (PFS) in patients with CRC.

Methods: Human CRC cell line HCT116 and HT29 cells were treated with regorafenib and its pharmacologically active metabolites, M2 or M5 at the same concentrations as those in sera of patients.

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