Publications by authors named "Youngae Lee"

Article Synopsis
  • The review covers the genetic and epigenetic factors related to food allergies, including their inheritance and the advantages and limitations of study methods.
  • Genome-wide association studies have identified 16 significant genetic variants linked to food allergies, often overlapping with other allergic conditions.
  • The article emphasizes the importance of integrating genetic and epigenetic data for understanding disease mechanisms and suggests future implications for predicting food allergy risks and responses to treatment.
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  • Particulate matter (PM) exposure can worsen atopic dermatitis (AD), and this study investigates the role of the pregnane X receptor (PXR) in this process.
  • The research used mouse models and human skin cells to show that PM increases inflammation and skin issues associated with AD while activating PXR.
  • PXR activation helps reduce PM-related inflammation by inhibiting the NF-κB pathway, suggesting that targeting PXR could be a potential treatment strategy for PM-induced AD worsening.
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Numerous recent evidence highlights epidemiological connections between rosacea and metabolic disorders. However, the precise path through which metabolic factors impact rosacea risk is still unclear. Therefore, this study aims to investigate the role of adiponectin, a crucial adipokine that regulates metabolic homeostasis, in the pathogenesis of rosacea.

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The presence of the blood group H2 antigen on the membrane of red blood cells determines blood type O in individuals and this H2 antigen serves as a precursor to the A and B antigens expressed in blood types A and B, respectively. However, the specific involvement of ABH antigens in skin diseases is unknown. Therefore, we aim to investigate the expression of ABH antigens in skin tissue of patients with atopic dermatitis (AD) and MC903-induced AD-like mice.

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Background: Children with sensitization against foods have to be orally food-challenged before eating these foods for the first time. However, the waiting time for an oral food challenge (OFC) in Germany is about 3-6 months. In contrast, there are hints that an early introduction of allergenic foods might be protective regarding the development of food allergy.

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Psoriasis is a multifaceted chronic inflammatory skin disease; however, its underlying molecular mechanisms remain unclear. In this study, we explored the role of fucosylation in psoriasis using an imiquimod-induced psoriasis-like mouse model. ABH antigen and fucosyltransferase 1 (Fut1) expression was reduced in the granular layer of lesional skin of patients with psoriasis.

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The development of atopic dermatitis in infancy, and subsequent allergies, such as asthma in later childhood, is known as the atopic march. The mechanism is largely unknown, however the course of disease indicates an inter-epithelial crosstalk, through the onset of inflammation in the skin and progression to other mucosal epithelia. In this study, we investigated if and how skin-lung epithelial crosstalk contributes to the development of the atopic march.

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Atopic dermatitis (AD) is a common inflammatory skin condition and prior genome-wide association studies (GWAS) have identified 71 associated loci. In the current study we conducted the largest AD GWAS to date (discovery N = 1,086,394, replication N = 3,604,027), combining previously reported cohorts with additional available data. We identified 81 loci (29 novel) in the European-only analysis (which all replicated in a separate European analysis) and 10 additional loci in the multi-ancestry analysis (3 novel).

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Genome-wide association studies (GWAS) provided fundamental insight into the genetic determinants of complex allergic diseases. For eczema, 58 susceptibility loci were reported. Protein-changing variants were associated with eczema at genome-wide significance at 12 loci.

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Skullcapflavone II (SFII), a flavonoid derived from , is an anticancer agent. We aimed to validate SFII for atopic dermatitis (AD) therapy by demonstrating the anti-inflammatory effects of SFII in an AD mouse model produced by the topical application of the vitamin D3 analog MC903. We showed that topical treatment with SFII significantly suppressed MC903-induced serum IgE levels compared with topical hydrocortisone (HC) treatment.

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Background: Peanut allergy is a frequent cause of food allergy and potentially life-threatening. Within this interdisciplinary research approach, we aim to unravel the complex mechanisms of peanut allergy. As a first step were applied in an exploratory manner the analysis of peanut allergic versus non-allergic controls.

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Pathogenic variants in genes that cause dilated cardiomyopathy (DCM) and arrhythmogenic cardiomyopathy (ACM) convey high risks for the development of heart failure through unknown mechanisms. Using single-nucleus RNA sequencing, we characterized the transcriptome of 880,000 nuclei from 18 control and 61 failing, nonischemic human hearts with pathogenic variants in DCM and ACM genes or idiopathic disease. We performed genotype-stratified analyses of the ventricular cell lineages and transcriptional states.

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Background: The role of elevated pre-diagnostic C-reactive protein (CRP) concentrations on mortality in individuals with colorectal cancer (CRC) remains unclear.

Methods: We investigated the association between pre-diagnostic high-sensitivity CRP concentrations and CRP genetic variation associated with circulating CRP and CRC-specific and all-cause mortality based on data from 1,235 individuals with CRC within the European Prospective Investigation into Cancer and Nutrition cohort using multivariable-adjusted Cox proportional hazards regression.

Results: During a median follow-up of 9.

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Background: A genetic defect in the epidermal barrier protein filaggrin (FLG) plays a major role in the etiology of eczema and associated allergic airways diseases. However, it is still controversial to what extend loss-of-function (LOF) mutations in FLG contribute to the development and persistence of food allergies.

Objectives: This study tested association of FLG LOF mutations with allergic reactions to diverse foods and investigated their potential effect on the persistence of early food allergies.

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Background: Up to 8% of all children in industrialized countries suffer from food allergies, whereas children with atopic eczema are affected considerably more frequently. In addition, the type and starting time of weaning foods seem to influence the development of food allergies. However, data from interventional studies on weaning are controversial.

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Article Synopsis
  • - Previous studies have shown that common genetic variants are linked to eczema, but this research focuses on understanding the impact of rare genetic variants on eczema risk by analyzing 21 different study groups.
  • - The study finds that rare genetic variants in specific genes (DUSP1, NOTCH4, and SLC9A4) are associated with eczema, with some variants likely affecting important protein functions.
  • - Additionally, the researchers identify five new common variants related to other genes, revealing that over 20% of the genetic heritability for eczema is due to these rare and low-frequency variants, opening up potential avenues for new treatments.
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Article Synopsis
  • Interferon-inducible GTPases, like immunity-related GTPases (IRGs) and guanylate-binding proteins (GBPs), help our cells fight harmful germs that get inside them.
  • Irgm2 is a special type of IRG that helps control how effectively our body can kill these germs, even though we don’t know exactly how it gets to where it needs to be.
  • Mice without Irgm2 are more likely to get sick from infections, showing how important Irgm2 is in fighting off these germs.
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Because of their common signaling molecules, the main T cell receptor (TCR) signaling cascades in CD4+ and CD8+ T cells are considered qualitatively identical. Herein, we show that TCR signaling in CD8+ T cells is qualitatively different from that in CD4+ T cells, since CD8α ignites another cardinal signaling cascade involving phospholipase C β4 (PLCβ4). TCR-mediated responses were severely impaired in PLCβ4-deficient CD8+ T cells, whereas those in CD4+ T cells were intact.

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Background: The purpose of this study was to develop a scale for assessing children's ego strength through the observation of children playing board games in a therapeutic setting. Because ego strength is an index of psychosocial health, it is important to assess ego strength in childhood. In particular, children aged 7 to 9 exhibit their ego-strength characteristics in a situation challenged by self-competence due to their latency period.

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Sepsis is a life-threating multi-organ disease induced by host innate immunity to pathogen-derived endotoxins including lipopolysaccharide (LPS). Direct sensing of LPS by caspase-11 activates inflammasomes and causes lethal sepsis in mice. Inhibition of caspase-11 inflammasomes is important for the prevention of LPS-induced septic shock; however, whether a caspase-11 inflammasome-specific suppressive mechanism exists is unclear.

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Article Synopsis
  • A study aimed to identify genetic risk factors influencing the age at which allergic diseases like asthma, hay fever, and eczema first appear in individuals of European ancestry.
  • Researchers analyzed data from 117,130 participants in the UK Biobank, discovering 50 genetic variants linked to the age of onset, with many variants influencing multiple allergic conditions.
  • The findings revealed that early-onset individuals tend to carry more allergy risk alleles, suggesting that genetic factors may differ between those with early and late onset allergic diseases, highlighting unique underlying biological mechanisms.
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The binding modes of various cationic porphyrins to DNA in an aqueous solution and under the molecular crowding condition induced by poly(ethylene glycol) (PEG) were compared by normal absorption, circular dichroism (CD), and linear dichroism (LD) spectroscopy techniques. Large negative CD and LD signals in the Soret absorption regions of the - and -TMPyP [-tetrakis (--methylpyridiniumyl) porphyrin (, = 3) and (, = 4)] were apparent in the aqueous solution, indicating an intercalative-binding mode, while a positive CD spectrum and a less intense negative LD spectrum for the -TMPyP ( = 2)-complexed DNA suggested a major-groove-binding mode. These binding modes are retained under a molecular crowding condition, suggesting that the PEG cluster cannot access the TMPyPs that are intercalated between the DNA base pairs or that bind at the major groove.

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