Publications by authors named "Dae-Woon Eom"

Introduction: Predicting the response to Bacillus Calmette-Guérin (BCG) therapy in high-risk patients with non-muscle invasive bladder cancer (NMIBC) is crucial, as failure may necessitate interventions, such as radical cystectomy or salvage therapy. With the recent classification of genetic class 2a (which has HER2 protein abundance as its signature mutation of ), evaluating its prognostic role and relationship with BCG response could yield important results.

Methods: This retrospective study included 160 patients with NMIBC who underwent transurethral resection of bladder tumors at Gangneung Asan Hospital between 2000 and 2013 and were stratified based on the European Organization for Research and Treatment of Cancer (EORTC) risk criteria.

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Introduction: Human epidermal growth factor receptor type 2 (HER2) overexpression is a prognostic factor and a therapeutic target for breast cancer; however, anti-HER2 therapies are ineffective in patients with bladder cancer. The authors investigated the effect of HER2 overexpression (HER2 + ) on the prognosis of muscle-invasive bladder cancer (MIBC).

Materials And Methods: This retrospective cohort study included patients who underwent initial transurethral resection of bladder tumors between 2005 and 2013 and were registered in the Korea National Health Insurance Database, which provides data on overall survival (OS).

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Indoleamine 2, 3-dioxygenase 1 (IDO1) is an immunomodulatory enzyme that catalyzes the degradation of tryptophan to kynurenine and induces immune tolerance in tumor cells. The effects of IDO1 on extrahepatic bile duct carcinoma (EHBDC) are poorly understood. Therefore, the present study aimed to investigate the expression and prognostic significance of IDO1 in EHBDC.

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Bacillus Calmette-Guérin (BCG) is the gold standard adjuvant treatment for non-muscle-invasive bladder cancer (NMIBC). However, given the current global shortage of BCG, new treatments are needed. We evaluated tumor microenvironment markers as potential BCG alternatives for NMIBC treatment.

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Objective: Pancreatic ductal adenocarcinoma (PDAC) and extrahepatic bile duct carcinoma (EBDC) are distinct entities with different clinicopathological implications. Therefore, research to differentiate between the two diseases is compulsory. In this study, four biomarkers were selected (Hippocalcin-like 1 (HPCAL1); annexin A10 (ANXA10); MUC5AC; sodium/potassium-transporting ATPase subunit beta-1 (ATP1B1)) and focus was placed on clarifying the diagnostic performance of each biomarker and pioneering novel-combined biomarker panels to discriminate between PDAC and EBDC.

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Article Synopsis
  • Cancer stem cells (CSCs) drive tumor growth and resist chemotherapy due to specific metabolic changes, but the link between their energy metabolism and redox systems in colon CSCs is not fully understood.* -
  • This study investigates how the Sulfiredoxin-Peroxiredoxin (Srx-Prx) redox system and mitochondrial oxidative phosphorylation (OXPHOS) contribute to the properties and survival of colon CSCs, revealing that Srx stabilizes key proteins and supports CSC maintenance.* -
  • The findings suggest that the Nrf2 and FoxM1 pathways promote OXPHOS and enhance the expression of the Srx-Prx system, highlighting this redox system as a promising target for developing therapies to eliminate
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Background: Colorectal adenocarcinoma is the third most common cancer worldwide and a leading cause of cancer-related death. The recent emergence of diverse immunotherapeutic agents has made it crucial to interpret a complex tumour microenvironment intermingled with tumour-infiltrating immune cells to predict the immunotherapeutic response rate. However, in colorectal adenocarcinoma, studies are lacking that provide detailed analyses of programmed death-ligand 1 (PD-L1) and tumour-infiltrating lymphocytes (TIL) to elucidate their prognostic values and to identify immunotherapy-targetable subgroups, preferably with multiple immune-related biomarkers.

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The diagnosis of small intestinal adenocarcinoma (SIAC) is usually determined at an advanced stage due to non-specific symptoms and the difficulty of exploring the small intestine. Therefore, the majority of SIAC patients have limited chemotherapeutic options. Until recently, the development of novel and effective therapies for SIAC have been limited owing to the low number of samples that have been collected and the low incidence of SIAC.

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Heme oxygenase-1 (HO-1) is an important catalytic enzyme in heme degradation, which increases during stressful conditions. It plays a major role in antioxidative and antiapoptotic processes and is associated with tumor growth and metastasis.This study aimed to evaluate the degree of HO-1 expressions in hepatocellular carcinoma (HCC) surgical specimens and the correlation between HO-1 expression and patient prognosis.

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Background: Red ginseng is a traditional medicine that has been used to treat numerous metabolic and inflammatory diseases. Probiotic administration has been established to have beneficial effects in non-alcoholic fatty liver disease (NAFLD). The purpose of this study was to determine whether a combination of Korean red ginseng (KRG) and probiotics could synergistically reduce NAFLD and liver inflammation compared with the effects reported for each individual product.

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Goals: We categorized gastric cancers into four types of tumor immune microenvironment based on PD-L1 expression and tumor-infiltrating lymphocytes (TILs) to analyze clinicopathologic characteristics and recommend an immunotherapy-targetable subgroup.

Procedures: Formalin-fixed, paraffin-embedded tissue samples of randomly selected gastric adenocarcinoma (n=479) were obtained and arrayed using a tissue-arraying instrument. Immunohistochemical stains for PD-L1, PD-1, and CD8 were performed and evaluated in addition to microsatellite instability, EBV infection, and HER-2 analyses.

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Heme oxygenase-1 (HO-1), a stress-response protein, is highly induced in various carcinomas. It is implicated in carcinogenesis and tumor progression. High HO-1 expression is associated with better prognosis of patients with colorectal and gastric cancers.

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PRF001 is a fragmented DNA polymer extracted from the testes of salmon. The purpose of this study was to assess the anti-inflammatory effect of PRF001 as well as the protective effect of PRF001 intake against arthritis in a rat model. , cell survival and inflammatory markers after HO treatment to induce cell damage were investigated in CHON-001 cells treated with different concentrations of PRF001.

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Background: The aim of the present study was to evaluate the potential protective effects of six ginsenosides (Rb1, Rb2, Rc, Rd, Rg1, and Rg3) isolated from against tacrolimus (FK506)-induced apoptosis in renal proximal tubular LLC-PK1 cells.

Methods: LLC-PK1 cells were treated with FK506 and ginsenosides, and cell viability was measured. Protein expressions of mitogen-activated protein kinases, caspase-3, and kidney injury molecule-1 (KIM-1) were evaluated by Western blotting analyses.

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Basaloid squamous cell carcinoma of the esophagus is very rare. Further, polypoid type of esophageal cancer is also rare. We have recently treated a case of basaloid squamous cell carcinoma which presented as a 1.

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Background: Compound FK506 is an immunosuppressant agent that is frequently used to prevent rejection of solid organs upon transplant. However, nephrotoxicity due to apoptosis and inflammatory response mediated by FK506 limit its usefulness. In this study, the protective effect of Korean Red Ginseng (KRG) against FK506-induced damage in LLC-PK1 pig kidney epithelial cells was investigated.

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Background: Fermented black ginseng (FBG) is processed ginseng by the repeated heat treatment and fermentation of raw ginseng. The protective effect and mechanism of FBG on cisplatin-induced nephrotoxicity was investigated to evaluate its therapeutic potential.

Methods: The free radical scavenging activity of FBG was measured using 1,1-diphenyl-2-picrylhydrazyl (DPPH).

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We report a unique case of synchronous double primary gastric cancer consisting of adenocarcinoma components with micropapillary features and composite glandular-endocrine cell carcinoma components. The patient was a 53-year-old man presenting with a 6-month history of epigastric pain and diarrhea. A subtotal gastrectomy was performed.

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Endometriosis is a benign gynecologic disease, characterized by the presence and growth of functional endometrial-like tissue outside uterus. This ectopic endometrial tissue is most commonly found in the peritoneum, ovaries and uterosacral ligaments, but extremely rarely there is involvement of the appendix or cecum. Here we report a case of cecal endometriosis presenting as a subepithelial tumor diagnosed by surgical excision.

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Purpose: The aim of this study was to define the capsules of synchronous multicentric small hepatocellular carcinomas (HCCs) with use of high-frequency intraoperative ultrasonography (IOUS).

Methods: Among the 131 consecutive patients undergoing hepatic resection and high-frequency IOUS for HCC, 16 synchronous multicentric small HCCs in 13 patients were histologically diagnosed in the resected specimens. High-frequency IOUS and pathologic findings of these lesions were compared, with particular focus on the presence and appearance of the capsule in or around each lesion.

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Activating KRAS and/or BRAF mutations have been identified as predictors of resistance to anti-epidermal growth factor receptor (EGFR) chemotherapy in colorectal cancer. But the status of KRAS and BRAF mutations and their clinicopathologic and prognostic significance has not been extensively evaluated in small intestinal adenocarcinomas. In this work, the KRAS and BRAF genes in 190 surgically resected small intestinal adenocarcinoma cases were sequenced and their association with various clinicopathologic variables, including survival of the patients, was analyzed.

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The present study investigated the renoprotective effect of an Artemisia asiatica extract and eupatilin in kidney epithelial (LLC-PK1) cells. Although cisplatin is effective against several cancers, its use is limited due to severe nephrotoxicity. Eupatilin is a flavonoid compound isolated from the Artemisia plant and possesses antioxidant as well as potent anticancer properties.

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Objectives: An extract of Artemisia asiatica was reported to possess antioxidative and cytoprotective actions in various experiments. Ischemia-reperfusion injury remains a major problem in kidney transplant, and the inflammatory response to ischemia-reperfusion injury exacerbates the resultant renal injury. In the present study, we investigated whether an extract of Artemisia asiatica exhibits renoprotective effects against ischemia-reperfusion-induced acute kidney injury in mice.

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