Publications by authors named "Wan Kyu Eo"

Background: Human endogenous retroviruses (HERVs) have been implicated in the pathogenesis of various diseases, particularly cancers. Previous investigations from our group demonstrated that targeted knockout (KO) of the HERV-K env gene led to a significant reduction in tumorigenic attributes, including proliferation, migration, and invasion of ovarian cancer cells.

Objective: In this study, we aimed to elucidate the impact of HERV-K env KO on gene expression in ovarian cancer cell lines through comparative RNA sequencing (RNA-Seq) analysis with two distinct HERV-K env KO ovarian cancer cell lines, SKOV3 and OVCAR3.

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Background: Human endogenous retrovirus (HERV)-K is a type of retrovirus that is present in the human genome, and its expression is usually silenced in healthy tissues. The precise mechanism by which HERV-K env influences cancer stemness is not fully understood, but it has been suggested that HERV-K env may activate various signaling pathways that promote stemness traits in cancer cells.

Objective: To establish the connection between HERV-K env expression and cancer stemness in ovarian cancer cells, we carried out correlation analyses between HERV-K env and the cancer stem cell (CSC) marker known as the cluster of differentiation 133 (CD133) gene in SKOV3 ovarian cancer cells.

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Background: Among various human endogenous retroviruses (HERVs), the HERV-K (HML-2) group has been reported to be highly related to cancer. In pancreatic cancer cells, shRNA-mediated downregulation of HERV-K env RNA decreases cell proliferation and tumor growth through the RAS-ERK-RSK pathway; in colorectal cancer, CRISPR-Cas9 knockout (KO) of the HERV-K env gene affects tumorigenic characteristics through the nupr-1 gene.

Objective: The effect of HERV-K env KO has not been studied in ovarian cancer cell lines.

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Background: Thymosin β4 (Tβ4) is a highly conserved actin binding protein associated with the metastatic potential of tumor cells by stimulating cell migration. The role of Tβ4 and its derived fragment peptides in migration of ovarian cancer cells has not been studied.

Objective: To analyze the effects of Tβ4 and its derived fragment peptides on ovarian cancer cell migration and invasion, we applied Tβ4 and three Tβ4-derived synthetic peptides to SKOV3 ovarian cancer cells.

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Background: Human endogenous retroviruses (HERVs) constitute around 8% of the human genome and have important roles in human health and disease, including cancers. Previous studies showed that HERV envelope (Env) proteins are highly expressed in cancer tissues and co-related with cancer progression. KAP1 has been reported to play a key role in regulating retrotransposons, including HERV-K, through epigenetic silencing.

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Several factors associated with the prognosis of patients with NSCLC have been reported in the literature; however, most of these factors cannot be examined preoperatively. In this study, the clinical utility of platelet parameters in patients with NSCLC who underwent curative resection was evaluated. A retrospective study on patients with NSCLC who underwent curative resection from July 2006 to September 2016 was conducted.

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Background: Hypomethylation of long interspersed nuclear element-1 (LINE-1) is closely related to certain cancers and concerns with aggressive tumor behavior. Previously, we reported LINE-1 open reading frame-1 (ORF1) protein level was significantly up-regulated in ovarian cancers compared with normal ovary. Hypomethylation of local LINE-1 sequence has been reported to reactivate MET proto-oncogene in colon cancers and hepatocellular carcinoma.

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Background: Constitutive photomorphogenic 1 (COP1) is an E3 ubiquitin ligase that regulates important target proteins for cell growth including p27. The tumor suppressor p27 negatively regulates the cell cycle by inhibiting cyclin-dependent kinase. COP1 negatively regulates p27 stability by mediating its nuclear export and degradation.

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: To evaluate the role of inflammatory markers for distinguishing malignant and benign ovarian masses. : Preoperative demographic, clinicopathologic, and laboratory variables were reviewed in patients with an ovarian mass that was subsequently diagnosed as either epithelial ovarian cancer (EOC) or a benign ovarian mass on histologic analysis. The differences between variables of the two groups were further evaluated.

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To measure hematologic parameters derived from the white blood cell (WBC) count and differential count (DC) as prognostic factors for survival in patients with stage IB and IIA cervical cancer. We retrospectively examined demographic, clinicopathologic, and laboratory parameters in a cohort of 233 patients with International Federation of Gynecology and Obstetrics stage IB and IIA cervical cancer who underwent surgical resection. We further assessed the effects of the WBC count and DC-derived hematologic parameters on progression-free survival (PFS) and overall survival (OS) after controlling for other parameters.

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Background: Serum vitamin B levels have been proposed as one of the survival prediction factors, although no survival analysis in metastatic cancer patients has been conducted yet. This study examined whether serum vitamin B levels could be a prognostic factor in metastatic cancer patients.

Methods: Data from a retrospective chart review were used to perform Kaplan-Meier and multivariate analyses of the Cox proportional hazards.

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Objective: We investigated whether the level of vascular endothelial growth factor (VEGF), placental growth factor (PlGF), and soluble VEGF receptor-1 (sFlt-1) in midtrimester amniotic fluid of preterm birth have different values compared with term delivery.

Materials And Methods: Our participants were 86 pregnant women who had undergone amniocentesis from 16 to 19 weeks of gestation. Forty-three cases were women with preterm delivery, and the other 43 cases were matched women with full-term delivery.

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Objective: We assessed the prognostic implications of preoperative lymphocyte-monocyte ratio (LMR) in patients with endometrial cancer (EC).

Methods: We retrospectively examined the LMR as a prognostic variable in a cohort of 255 patients with EC who underwent surgical resection. Patients were categorized into two groups according to the LMR (LMR-low and LMR-high) using cutoff points determined by receiving operator characteristic (ROC) curve analysis.

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Objective: To measure the prognostic value of the lymphocyte-monocyte ratio (LMR) in patients with epithelial ovarian cancer (EOC).

Methods: We retrospectively examined the LMR as a prognosticator in a cohort of 234 patients with EOC who underwent surgical resection. Patients were categorized into two different groups based on the LMR (LMR-low and LMR-high) using cut-off values determined by receiver operating characteristic (ROC) curve analysis.

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Nutritional status has been associated with long-term outcomes in cancer patients. The prognostic nutritional index (PNI) is calculated by serum albumin concentration and absolute lymphocyte count, and it may be a surrogate biomarker for nutritional status and possibly predicts overall survival (OS) of gastric cancer. We evaluated the value of the PNI as a predictor for disease-free survival (DFS) in addition to OS in a cohort of 314 gastric cancer patients who underwent curative surgical resection.

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Objective: To evaluate the bone mineral density (BMD) in the lumbar spine and femur in postmenopausal women with cervical cancer and endometrial cancer without bone metastasis in comparison with that in healthy control postmenopausal women, and to assess the loss of BMD according to the cancer stage.

Materials And Methods: We analyzed the BMD of the lumbar spine and femur using dual-energy X-ray absorptiometry (DXA) in 218 patients with cervical cancer, 85 patients with endometrial cancer, and 259 healthy controls. The serum levels of calcium (Ca), phosphorus (P), osteocalcin (OSC), and total alkaline phosphatase (ALP), and urine deoxypyridinoline(DPL) were measured in all participants.

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Aim: To measure the prognostic significance of absolute monocyte count/absolute lymphocyte count prognostic score (AMLPS) in patients with gastric cancer.

Methods: We retrospectively examined the combination of absolute monocyte count (AMC) and absolute lymphocyte count (ALC) as prognostic variables in a cohort of 299 gastric cancer patients who underwent surgical resection between 2006 and 2013 and were followed at a single institution. Both AMC and ALC were dichotomized into two groups using cut-off points determined by receiving operator characteristic curve analysis.

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Article Synopsis
  • DDX4 is an RNA helicase involved in various cellular processes and is specific to germ cells, playing a key role in producing oocytes.
  • Recent findings indicate that DDX4 is overexpressed in epithelial ovarian cancer and affects DNA damage response mechanisms.
  • A study found that DDX4 and the cancer stem cell marker CD133 are significantly elevated in ovarian cancer, suggesting DDX4 may be crucial for ovarian cancer stem cells and could serve as a potential marker.
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Background: Systemic treatments for advanced non-small cell lung cancer (NSCLC) have modest survival benefits but high toxicity. Rhus verniciflua Stokes (RVS), the lacquer tree, is an ancient traditional medicine being used for the treatment of cancer. We investigated the efficacy and safety of allergen-removed RVS extract (aRVS) for the prolongation of survival in NSCLC after the failure of first-line or second-line chemotherapy.

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There is no established protocol proven to be beneficial for treatment of hepatocellular carcinoma recurrence after liver transplantation. Only a few reports have shown direct treatment by surgery or ablation to be independent predictors of survival for localized recurrence. Moreover, the necessity of immunosuppression to prevent allograft rejection makes many physicians hesitate to administer systemic chemotherapy.

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Breast cancer metastases to the stomach are infrequent, with an estimated incidence rate of approximately 0.3%. Gastric metastases usually are derived from lobular rather than from ductal breast cancer.

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Objective: We wanted to evaluate the MR findings for differentiating between necrotizing fasciitis (NF) and pyomyositis (PM).

Materials And Methods: The MR images of 19 patients with surgically confirmed NF (n = 11) and pathologically confirmed PM (n = 8) were retrospectively reviewed with regard to the presence or absence of any MRI finding criteria that could differentiate between them.

Results: The patients with NF had a significantly greater prevalence of the following MR findings (p < 0.

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Renal cell carcinoma (RCC) may metastasize to almost any organ, but metastasis to the small bowel is rare. Small bowel metastasis from RCC can induce obstruction or bleeding, and perforation can also be induced in rare case. Yet RCC metastasis to the small bowel is unlikely to be a direct cause of intussusceptions.

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Purpose: The prognosis of non-Hodgkin's lymphoma (NHL) is disappointing for patients who experience primary treatment failure or relapse after an initial response. Patients in relapse may respond again to chemotherapy, however the time to disease progression becomes shorter and eventually the disease becomes resistant. The aim of this study was to evaluate the efficacy and safety of the MINE regimen in the treatment of patients with relapsed or refractory NHL.

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