Publications by authors named "Hye-Jin Chang"

The aim of this study was to identify differentially expressed lncRNAs (DElncRNAs) and mRNAs (DEmRNAs) in the endometrium of individuals with and without endometriosis (EMS) during the proliferative (P) and secretory (S) phases of the menstrual cycle. Tissues were obtained from 18 control (CT; P-phase [pCT], = 8; S-phase [sCT], = 13) and 23 EMS patients (P-phase [pEMS], = 13; S-phase [sEMS], = 12). DElncRNAs and DEmRNAs were analyzed using total RNA-sequencing.

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In the delivery room, fetal well-being is evaluated through laboratory tests, biosignals like cardiotocography, and imaging techniques such as fetal echocardiography. We have developed a multimodal machine learning model that integrates medical records, biosignals, and imaging data to predict fetal acidosis, using a dataset from a tertiary hospital's delivery room (n=2,266). To achieve this, features were extracted from unstructured data sources, including biosignals and imaging, and then merged with structured data from medical records.

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Article Synopsis
  • Excessive alcohol consumption affects the brain by altering neurotransmitter and hormonal systems, impacting areas like the hippocampus and forebrain.
  • The study investigated how ethanol exposure influences the expression of coding and noncoding RNAs in Neuro2a neuroblastoma cells over 24 and 72 hours, revealing significant changes in cell proliferation and RNA expression.
  • Results showed that chronic exposure to ethanol (100 mM for 72 hours) reduced cell growth and led to over 1700 RNA transcripts' changes, particularly involving long noncoding RNAs, enhancing the understanding of alcohol's neurobiological impacts.
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Purpose: Fetal well-being is usually assessed via fetal heart rate (FHR) monitoring during the antepartum period. However, the interpretation of FHR is a complex and subjective process with low reliability. This study developed a machine learning model that can classify fetal cardiotocography results as normal or abnormal.

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Acetylation on lysine residues is considered one of the most potent protein post-translational modifications, owing to its crucial role in cellular metabolism and regulatory processes. Recent advances in experimental techniques have unraveled several lysine acetylation substrates and sites. However, owing to its cost-ineffectiveness, cumbersome process, time-consumption, and labor-intensiveness, several efforts have been geared towards the development of computational tools.

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  • PFASs (perfluoroalkyl substances) are concerning due to their health risks and ability to persist in the environment, especially affecting pregnant women and their fetuses through placental transfer.
  • In a study involving 62 pregnant Korean women and their partners, researchers measured PFAS concentrations in maternal, paternal, and umbilical cord serum, finding notable differences in PFAS compositions between these groups.
  • The study revealed that certain PFASs, like PFOA and PFHxS, had higher placental transfer rates compared to PFOS, and factors such as gestational age and birth weight influenced these transfer rates, highlighting the need for more research on newer PFAS compounds.
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Introduction: Psychological factors such as anxiety and confidence that students have in the patient care situation are important in that this affects the actual clinical performance. Students who are just starting clinical practice have a lack of clinical knowledge, skill proficiency, and patient communication skills, so they experience anxiety and lack of confidence in clinical setting. Practice in a safe environment, such as simulation education, can help students perform more settled and competently in patient care.

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Betulinic acid (BA) is a naturally arising pentacyclic triterpenoid that has anti-malarial, anti-retroviral, anti-inflammatory, and anti-cancer biological effects. More recently, it has been reported to possess anti-obesity activity mediated by the activation of AMP-activated protein kinase (AMPK). We further investigated antidiabetic activity of BA in mouse tissues at the cellular and systemic levels.

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Anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is a severe autoimmune paraneoplastic syndrome associated with ovarian teratomas. Most patients develop neurologic symptoms, including psychosis, memory deficits, seizures, or abnormal movements, and experience abdominal pain related to ovarian neoplasm. We present a case report of three patients diagnosed with anti-NMDAR encephalitis accompanied by ovarian teratomas at Ajou University Hospital in Korea.

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  • The study explores the role of mitochondrial tumor suppressor 1 (MTUS1) in the mouse uterus during early pregnancy and its regulation by progesterone receptor (PGR) and ARID1A.
  • Researchers used quantitative techniques to analyze MTUS1 expression and its response to hormone treatment throughout pregnancy stages.
  • Findings indicate that MTUS1 levels rise early in pregnancy but drop in specific genetically altered mice, suggesting that both ARID1A and PGR are crucial for MTUS1 regulation in the uterine epithelial cells.
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The PI3K/AKT signaling pathway plays a critical role in the maintenance of equilibrium between cell survival and apoptosis. The Pik3ca gene is mutated in a range of human cancers. It has been found to be oncogenic, and mutations lead to constitutive activation of the PI3K/AKT pathway.

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The ovarian steroid hormones, estrogen (E2) and progesterone (P4), are essential regulators of uterine functions necessary for development, embryo implantation, and normal pregnancy. ARID1A plays an important role in steroid hormone signaling in endometrial function and pregnancy. In previous studies, using high density DNA microarray analysis, we identified phosphatidylinositol-3-kinase interacting protein 1 (Pik3ip1) as one of the genes up-regulated by ARID1A.

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The four jointed box 1 (FJX1) is a regulator of angiogenesis, and the levels of FJX1 are increased in several types of cancer. Angiogenesis plays a critical role in endometrial growth as well as in several gynecologic disorders including endometriosis. However, the function of FJX1 has not been studied in endometriosis.

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Recently, preparation and screening of compound libraries remain one of the most challenging tasks in drug discovery, biomarker detection, and biomolecular profiling processes. So far, several distinct encoding/decoding methods such as chemical encoding, graphical encoding, and optical encoding have been reported to identify those libraries. In this paper, a simple and efficient surface-enhanced Raman spectroscopic (SERS) barcoding method using highly sensitive SERS nanoparticles (SERS ID) is presented.

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Immune dysregulation, polyendocrinopathy, enteropathy, X-linked (IPEX) syndrome (OMIM 304790) is a rare hereditary disorder of the immune regulatory system caused by FOXP3 mutations. The clinical features of this syndrome include a wide spectrum of severe autoimmune diseases and renal involvement, mostly due to tubulointerstitial diseases, in some patients. Glomerulopathy of membranous nephropathy (MN) and minimal change nephrotic syndrome (MCNS), however, have also been reported.

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This prospective study investigated the relationship between anti-Müllerian hormone (AMH) level in the follicular fluid (FF) and the quality of the oocyte and embryo. A total of 65 FF samples from 54 women were included in this study. FF was collected from the largest preovulatory follicle sized≥20 mm of mean diameter from each ovary.

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Objective: To evaluate the feasibility of single-port laparoscopic myomectomy (SPLM) with intracoporeal suture-tying and transumbilical morcellation.

Study Design: We retrospectively reviewed the medical records of 100 consecutive women who underwent SPLM without any combined surgery between January 2010 and July 2011. The medical records were reviewed and the clinical outcomes were analyzed.

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Purpose: Adult Korean patients on chronic dialysis have a 9-year survival rate of 50%, with cardiovascular problems being the most significant cause of death. The 2011 annual report of the North American Pediatric Renal Trials and Collaborative Studies group reported 3-year survival rates of 93.4% and relatively poorer survival in younger patients.

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Objective: To investigate the association of individual follicular fluid (FF) leptin and adiponectin levels with the quality of the corresponding oocyte and embryo.

Methods: We prospectively enrolled 67 women who underwent controlled ovarian hyperstimulation with 89 FF samples. FF and the corresponding oocyte was obtained from a single dominant preovulatory follicle at the time of oocyte retrieval.

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Hemolytic uremic syndrome (HUS) is one of the most common causes of acute renal failure in childhood and is primarily diagnosed in up to 4.5% of children who undergo chronic renal replacement therapy. Escherichia coli serotype O157:H7 is the predominant bacterial strain identified in patients with HUS; more than 100 types of Shiga toxin-producing enterohemorrhagic E.

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Objective: To investigate outcomes of stimulated IVF cycles in which GnRH antagonist was omitted on the ovulation triggering day.

Methods: A total of 86 women who underwent controlled ovarian hyperstimulation with recombinant FSH and GnRH antagonist flexible multiple-dose protocols were recruited and prospectively randomized into the conventional group (group A) or cessation group (group B). The GnRH antagonist, 0.

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Objective: To investigate the effect of peroxisome proliferator activated receptor γ (PPARγ) agonist on the cell proliferation properties and expression of human telomerase reverse transcriptase (hTERT) and aromatase in cultured endometrial stromal cell (ESC) from patients with endometriosis.

Methods: Human endometrial tissues were obtained from women with endometriosis and healthy women (controls) using endometrial biopsy. Isolated ESCs were cultured and the cell proliferation was measured by 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide assay and expression of hTERT, aromatase, and cyclooxygenase (COX)-2 by western blotting according to the addition of rosiglitazone (PPARγ agonist).

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Aim: In order to find the optimal exposure time of cryoprotectant, we performed a comparison of vitrification versus slow freezing according to the degree of normal morphology and apoptosis of human ovarian follicles.

Materials And Methods: Eleven patients aged 20-41 years who underwent operative laparoscopy for benign ovarian cysts or cesarean section were enrolled in this study. We carried out a prospective parallel comparison of survival and morphology of follicles after freezing (slow freezing and vitrification) and thawing.

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