Publications by authors named "Kyung Chul Choi"

Despite significant progress in the field of human breast cancer research and treatment, there is a consistent increase in the incidence rate of 0.5 percent annually, posing challenges in the development of effective novel therapeutic strategies. The failure rate of drugs in clinical trials stands at approximately 95%, primarily attributed to the limitations and lack of reliability of existing preclinical models, such as mice, which do not mimic human tumor biology.

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TP53-induced glycolysis and apoptosis regulator (TIGAR) regulates redox homeostasis and provides the intermediates necessary for cell growth by reducing the glycolytic rate. During cellular senescence, cells undergo metabolic rewiring towards the glycolytic pathway, along with the development of the senescence-associated secretory phenotype (SASP), also known as the secretome. We observed that TIGAR expression increased during replicative senescence following the in vitro expansion of human mesenchymal stromal cells (MSCs) and that TIGAR knockout (KO) decreased SASP factors and triggered premature senescence with decelerated progression.

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Lung adenocarcinoma (LUAD) exhibits significant molecular heterogeneity; however, previous studies have not fully explored its classification into distinct molecular subtypes. Here, we identified LUAD-significant chromosomal instability (CIN) phenotype genes ( = 24) using a TCGA-LUAD cohort ( = 592) and evaluated their ability to predict pathologic grade. Unsupervised clustering and principal component analysis revealed that LUAD patients could be classified into CIN phenotype-related subtypes (Group, Group, and Group), each exhibiting distinct transcriptomic patterns.

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Triple-negative breast cancer is a characteristic subtype of breast cancer that lacks the estrogen receptor, human epidermal growth factor receptor 2, and progesterone receptor. Because of its highly diverse subtypes, increased metastasis capability, and poor prognosis, the risk of mortality for people with triple-negative breast cancers is high as compared with other cancers. Chemotherapy is currently playing a major role in treating triple-negative breast cancer patients; however, poor prognosis due to drug resistance is causing serious concern.

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  • The study reviews the evolution and effectiveness of the anterior transcorporeal approach in minimally invasive cervical spine surgery, highlighting its advantages over traditional methods for treating conditions like radiculopathy and myelopathy.
  • A thorough literature review was conducted, analyzing various studies to assess the technique’s historical development, biomechanical aspects, implementation, and clinical outcomes.
  • Results indicate that this approach shows promising clinical results and has gained support due to advancements in medical technology and innovative surgical practices, making it a viable alternative for specific cervical spine disorders.
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Triple-negative breast cancer (TNBC) is a highly heterogeneous disease defined by the absence of estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER-2), resulting in poor clinical outcomes and high mortality. The present study was aimed to evaluate the efficacy of Punicalagin (PCG), a polyphenol obtained from the , against TNBC. We evaluated the therapeutic potential of PCG in TNBC (MDA-MB-231, BT-20) and ER + (MCF-7) breast cancer cells.

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Fludioxonil, an antifungal agent used as a pesticide, leaves a measurable residue in fruits and vegetables. It has been identified to cause endocrine disruption, interrupt normal development, and cause various diseases such as cancers. In this study, fludioxonil was examined for its effects on the development and metastasis of breast cancer cells.

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Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is a promising anticancer agent because it kills cancer cells while sparing normal cells. However, many cancers, including pancreatic ductal adenocarcinoma (PDAC), exhibit intrinsic or acquired resistance to TRAIL, and the molecular mechanisms underlying TRAIL resistance in cancers, particularly in PDAC, remain unclear. In this study, we demonstrated that glutamine (Gln) endows PDAC cells with resistance to TRAIL through KDM4C-mediated epigenetic regulation of cFLIP.

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Cordycepin, a valuable bioactive component isolated from , has been reported to possess anti-cancer potential and the property to enhance the effects of chemotherapeutic agents in various types of cancers. However, the ability of cordycepin to chemosensitize cholangiocarcinoma (CCA) cells to gemcitabine has not yet been evaluated. The current study was performed to evaluate the above, and the mechanisms associated with it.

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  • - This study explored the impact of gamma-aminobutyric acid-rich rice bran extract (GRBe) on stressed mice, specifically focusing on its effects in forced swimming and tail suspension tests.
  • - After four weeks of GRBe administration (500-2000 mg/kg), findings showed reduced levels of dopamine and corticosterone, along with increased serotonin levels in both blood and brain.
  • - Results indicate that GRBe may help alleviate stress and related issues like sleep disorders and obesity by balancing neurotransmitters, hormonal levels, and cytokines linked to psychological health.
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  • PhD finger protein 7 (Phf7) is crucial for spermiogenesis and male fertility, as its absence leads to infertility and growth issues in mice.
  • Phf7 knockout mice exhibit lower body weight, reduced bone density, and increased osteoclasts, indicating problems in bone remodeling.
  • Lower testosterone levels and reduced expression of key steroidogenesis genes in Phf7 mice suggests that Phf7 deficiency hampers male hormone production, impacting overall bone health.
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Fludioxonil (Flu) is a phenylpyrrole fungicide and is currently used in over 900 agricultural products globally. Flu possesses endocrine-disrupting chemical-like properties and has been shown to mediate various physiological and pathological changes, such as apoptosis and differentiation, in diverse cell lines. However, the effects of Flu on cardiomyocytes have not been studied so far.

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Cholangiocarcinoma (CCA) is a malignant biliary tract tumor with a high mortality rate and refractoriness to chemotherapy. Gemcitabine is an anti-cancer chemotherapeutic agent used for CCA, but the efficacy of gemcitabine in CCA treatment is limited, due to the acquisition of chemoresistance. The present study evaluated the chemosensitizing effects of Amurensin G (AMG), a natural sirtuin-1 inhibitor derived from , in the SNU-478 CCA cells.

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Cigarette smoke induces an inflammatory response in the lungs by recruiting inflammatory cells, leading to lung diseases such as lung cancer, chronic obstructive pulmonary disease, and pulmonary fibrosis. Existing inhalation exposure methods for assessing the adverse effects of cigarette smoke require expensive equipment and are labor-intensive. Therefore, we attempted to develop a novel method to assess these adverse effects using intratracheal instillation (ITI) of whole cigarette smoke condensate (WCSC).

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With the growing interest in companion animals and the rapidly expanding animal healthcare and pharmaceuticals market worldwide. With the advancements in RNA-sequencing (RNA-seq) technology, it has become a valuable tool for understanding biological processes in companion animals and has multiple applications in animal healthcare. Historically, veterinary diagnoses and treatments relied solely on clinical symptoms and drugs used in human diseases.

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The increase in the types and complexity of diseases has led to significant advances in diagnostic techniques and the availability of effective therapies. Recent studies have focused on the role of mitochondrial dysfunction in the pathogenesis of cardiovascular diseases (CVDs). Mitochondria are important organelles in cells that generate energy.

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Good immunity is highly valued in modern society. Although yuja's efficacy in immunity enhancement has been elucidated, there have been few studies on its role. In this study, we investigate the immune enhancement activity of yuja juice extracts (YJEs) and yuja concentrate extracts (YCEs).

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Aims: Gastric cancer (GC) is an invasive, fatal disease with a poor prognosis. Gene-directed enzyme prodrug therapy via genetically engineered neural stem cells (GENSTECs) has been widely studied in various malignancies, such as breast, ovarian, and renal cancer. In this study, the human neural stem cells expressing cytosine deaminase and interferon beta (HB1.

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Cancer is reported to be a major cause of death worldwide, accounting for 10 million in 2020 based on 19 [...

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Pancreatic ductal adenocarcinoma (PDAC) is one of the most aggressive cancer types that is highly resistant to conventional treatments, such as chemotherapy and radiotherapy. As the demand for more effective therapeutics for PDAC treatment increases, various approaches have been studied to develop novel targets. The cellular communication network (CCN) family is a matricellular protein that modulates various cellular functions, including cell adhesion, proliferation, migration, and invasiveness.

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Objective: The study aims to assess the current development status of transforaminal full-endoscopic spine surgery (TFES) by exploring and analyzing the published literature to obtain an overview of this field and discover the evolution and emerging topics that are underrepresented.

Methods: Using Bibliometrix, CiteSpace, and VOSviewer, we analyzed the bibliometric data selected from the Web of Science Core Collection between January 2002 and November 2022. The descriptive and evaluative analyses of authors, institutes, countries, journals, keywords, and references are compiled.

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  • The study aimed to assess radiation exposure for surgeons during transforaminal endoscopic lumbar foraminotomy (TELF) and compare outcomes of two techniques: C-arm fluoroscopic guidance (C-TELF) and O-arm navigation (O-TELF).
  • Researchers analyzed medical records of 40 patients (18 with C-TELF and 22 with O-TELF) between June 2015 and November 2022, measuring pain relief and radiologic features post-surgery.
  • Findings showed C-TELF exposed surgeons to a small amount of radiation, while O-TELF had no radiation exposure but took about 37 minutes longer; both methods improved patient outcomes similarly, leading to a conclusion based on surgeon
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  • The study conducted a systematic review to create a decision-making algorithm for choosing between two surgical approaches for lumbar disc herniation: transforaminal endoscopic lumbar discectomy (TELD) and interlaminar endoscopic lumbar discectomy (IELD).
  • Over the years, full-endoscopic discectomy has increased in popularity, but there has been no formal algorithm to guide surgeons in selecting the best approach.
  • The researchers analyzed 474 articles and narrowed it down to 53 relevant studies to inform the algorithm, which recommends TELD for specific zones and levels of lumbar disc herniation.
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Pancreatic ductal adenocarcinoma (PDAC) is one of the most aggressive cancers, with high mortality and recurrence rate. In this study, we generated a human immune system mouse model by transplanting human peripheral blood mononuclear cells into NSG-B2m mice followed by xenografting AsPC-1 cells, after which we assessed the role of transforming growth factor-β2 (TGF-β2) in T-cell-mediated anti-tumor immunity. We observed that inhibiting the TGF-β2 production by TGF-β2 antisense oligonucleotide (TASO) combined with IL-2 delays pancreatic cancer growth.

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Glioblastoma multiforme (GBM), the most aggressive and malignant glioma, has a poor prognosis. Although patients with GBM are treated with surgery, chemotherapy, and radiation therapy, GBM is highly resistant to treatment, making it difficult and expensive to treat. In this study, we analyzed the Gene Expression Profiling Interactive Analysis dataset, the Cancer Genome Atlas dataset, and Gene Expression Omnibus array data.

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