Publications by authors named "Hyeji Lee"

Background: The phenotypic outcomes of de novo variants (DNVs) in autism spectrum disorder (ASD) exhibit wide variability. To date, no study has comprehensively estimated DNV effects accounting for familial phenotypic background.

Methods: To evaluate DNV effects in a family-relative context, we defined within-family standardized deviations (WFSD) by subtracting phenotype scores of unaffected family members and standardizing the result.

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Large-scale national biobank projects utilizing whole-genome sequencing have emerged as transformative resources for understanding human genetic variation and its relationship to health and disease. These initiatives, which include the UK Biobank, All of Us Research Program, Singapore's PRECISE, Biobank Japan, and the National Project of Bio-Big Data of Korea, are generating unprecedented volumes of high-resolution genomic data integrated with comprehensive phenotypic, environmental, and clinical information. This review examines the methodologies, contributions, and challenges of major WGS-based national genome projects worldwide.

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Background: Congenital anomalies (CAs) encompass a wide spectrum of structural and functional abnormalities during fetal development, commonly presenting at birth. Identifying the cause of CA is essential for accurate diagnosis and treatment. Using a target-gene approach, genetic variants could be found in certain CA patients.

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  • Whole-genome sequencing (WGS) of Korean autism families reveals that autistic females have a higher genetic burden than males, indicating a higher liability threshold for females compared to males across different ancestries.
  • The study analyzes data from a large sample of Korean individuals and compares it with European ancestry cohorts, finding that sex differences in genetic burden and autism symptoms vary significantly.
  • Results show that while females carry more damaging genetic variants, male siblings of autistic females display more severe social communication issues, highlighting the complexity of autism's genetic factors and the influence of sex on autistic traits.
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The drive to enhance the operational durability and reliability of stretchable and wearable electronic and electrochemical devices has led to the exploration of self-healing materials that can recover from both physical and functional failures. In the present study, we fabricated a self-healable solid polymer electrolyte, referred to as an ionogel, using reversible hydrogen bonding between the ureidopyrimidone units of a block copolymer (BCP) network swollen in an ionic liquid (IL). The BCP consisted of poly(styrene--(methyl acrylate--ureidopyrimidone methacrylate)) [poly(S--(MA--UPyMA)], with the IL-phobic polystyrene forming micellar cores that were interconnected via intercorona hydrogen bonding between the ureidopyrimidone units.

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  • The study aimed to assess how smoking status affects hidden coronary artery disease (atherosclerosis) in people without symptoms, using advanced imaging technology (CCTA).
  • Out of 9,285 participants examined, current smokers had notably higher risks of various forms of arterial plaque and obstructive coronary artery disease compared to never smokers, while former smokers mainly showed increased risk for non-calcified plaque.
  • The findings highlight that current smoking is strongly linked to early signs of heart disease, and former smoking also raises cardiovascular risk due to more non-calcified plaques.
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Variants in cis-regulatory elements link the noncoding genome to human pathology; however, detailed analytic tools for understanding the association between cell-level brain pathology and noncoding variants are lacking. CWAS-Plus, adapted from a Python package for category-wide association testing (CWAS), enhances noncoding variant analysis by integrating both whole-genome sequencing (WGS) and user-provided functional data. With simplified parameter settings and an efficient multiple testing correction method, CWAS-Plus conducts the CWAS workflow 50 times faster than CWAS, making it more accessible and user-friendly for researchers.

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Scope: The decline in estrogen during menopause contributes to a variety of menopausal symptoms, for which hormone replacement therapy (HRT) has been extensively applied. Regarding side effects and limited effectiveness of HRT for specific individuals, there is a growing interest in safe alternatives such as phytoestrogens which are structurally analogous to estrogens. This study aims to investigate the efficacy of yam and gromwell extracts, rich in bioactive compounds, and the synergistic effect of extracts on symptoms induced by estrogen deficiency in ovariectomized (OVX) mice.

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Aim: Short tandem repeats (STRs) are repetitive DNA sequences and highly mutable in various human disorders. While the involvement of STRs in various genetic disorders has been extensively studied, their role in autism spectrum disorder (ASD) remains largely unexplored. In this study, we aimed to investigate genetic association of STR expansions with ASD using whole genome sequencing (WGS) and identify risk loci associated with ASD phenotypes.

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Objective: This study was to examine characteristics concerning frequent users of emergency medical services (EMS) transport by comparing patients who used EMS transport frequently for one year and those who used EMS transport for more than two years consecutively.

Methods: A retrospective review for frequent use of EMS transport was conducted. The patients from the fire stations that transported more than 70% of all EMS transport to the study hospital emergency department (ED) were included.

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Article Synopsis
  • The research explores the link between noncoding genome variants and brain diseases, emphasizing a lack of tools to analyze these connections effectively.
  • A new tool called CWAS-Plus has been developed to enhance the analysis of noncoding variants using whole-genome sequencing and functional data, providing quicker and more efficient results.
  • CWAS-Plus successfully identified significant noncoding variant associations in autism and Alzheimer's disease, showcasing its effectiveness for large-scale genomic studies.
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We demonstrate an understanding of different physicochemical properties of copolymers induced by systematic changes in their structural parameters, i.e., the chemical structure of the comonomer unit, composition, molecular weight, and dispersity.

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Background: The relationship between depression and subclinical coronary atherosclerosis in asymptomatic individuals is not clear. We evaluated this relationship in a Korean population.

Methods And Results: We analyzed 3920 individuals (mean age 54.

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Allium ulleungense (AU) and A. microdictyon (AM) are valuable medicinal and edible vegetables, referred to as mountain garlic in Korea. The identification of AU, AM and a neighboring species A.

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This study sought to evaluate the association between the degree of hypertension and subclinical coronary atherosclerosis in asymptomatic subjects with and without diabetes mellitus (DM). We retrospectively analyzed 7,352 asymptomatic subjects (mean age 52.8 ± 7.

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In this context, the open-circuit voltage generated by either poly (vinylidene fluoride) or PVDF and ZnO composite sample before being enhanced to 4.2 V compared to 1.2 V for the samples of pure PVDF.

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This experimental study was conducted to evaluate the deflection performance of wire-integrated steel deck plates with various end details subjected to cumulative gravity loads. In general, when deck plates are installed in the Republic of Korea, vertical bars are mounted at the ends of the wire-integrated deck plates. However, this process can extend the construction time, thus incurring additional costs.

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Smoking is a severe addictive health risk behavior and notorious for the high likelihood of relapse after attempted cessation. Such an addictive pattern in smoking has been associated with neurobiological changes in the brain. However, little is known whether the neural changes associated with chronic smoking persist after a long period of successful abstinence.

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  • The study aimed to explore the genetic factors influencing early neurodevelopmental outcomes in children with developmental disabilities (DDs).
  • A cohort of 191 children was assessed, with 19 showing diagnostic improvement and 172 not improving by the age of 72-84 months.
  • Findings indicated that the improvement group had fewer risk variants in known DD-related genes, suggesting that genetic factors may play a role in clinical outcomes and could inform future models for analyzing these conditions.
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  • Researchers studied tiny particles called exosomes that come from brain cancer cells, especially those from glioblastoma.
  • They loaded a new cancer-fighting drug called selumetinib into these exosomes to see how well they could target brain tumors.
  • The results showed that these exosomes can deliver selumetinib directly to the cancer cells without harming healthy brain cells, making them a promising way to treat glioblastoma.
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  • * The analysis divided participants into married and unmarried categories, with no significant differences found in the prevalence of coronary plaque or significant stenosis based on marital status after adjusting for cardiovascular risk factors.
  • * Ultimately, the findings suggest that being unmarried does not correlate with an increased risk of subclinical coronary atherosclerosis in this population.
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Background And Aims: There is limited data on the association between serum phosphorus concentration (SPC) and subclinical coronary atherosclerosis in low-risk asymptomatic subjects without kidney dysfunction.

Materials And Methods: We retrospectively analyzed 1,636 Korean individuals (mean age 52.6 ± 7.

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