Publications by authors named "Joo Sung Kim"

Sensorineural hearing loss is the most common form of deafness, typically resulting from the loss of sensory cells on the basilar membrane, which cannot regenerate and thus lose sensitivity to sound vibrations. Here, we report a reconfigurable piezo-ionotropic polymer membrane engineered for biomimetic sustainable multi-resonance acoustic sensing, offering exceptional sensitivity (530 kPa) and broadband frequency discrimination (20 Hz to 3300 Hz) while remaining resistant to "dying". The acoustic sensing capability is driven by an ion hitching-in cage effect intrinsic to the ion gel combined with fluorinated polyurethane.

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Background And Aims: This study evaluated the impact of monitoring with colonoscopy and magnetic resonance enterography on clinical decision-making and long-term outcomes in advanced therapy-naïve Crohn's disease patients with moderate-to-severe disease.

Methods: A retrospective review was conducted on 157 biologic-naïve Crohn's disease patients with moderate-to-severe disease at the initiation of advanced therapy between 2006 and 2023. Participants were categorized into three groups according to monitoring method within two years post-treatment: (1) tight monitoring (colonoscopy and magnetic resonance enterography), (2) semi-tight monitoring (either colonoscopy or magnetic resonance enterography), and (3) conventional monitoring (clinical outcomes including laboratory tests only).

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Accurate diagnosis and understanding of gastrointestinal (GI) diseases such as ulcerative colitis and Hirschsprung's disease remain challenging due to the limitations of traditional two-dimensional (2D) histopathology in capturing the intricate three-dimensional (3D) architecture and dynamic microenvironment of GI tissues. This study explores the potential of integrating 3D imaging techniques with artificial intelligence (AI)-based analysis to improve histological evaluation and diagnostic accuracy. Using advanced imaging and computational tools, we identified critical structural and functional details of the enteric nervous system and associated tissues that are often missed by 2D approaches.

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Background: Acute lateral ankle sprains (ALAS) are linked to altered spinal-reflexive excitability that may predicate sensorimotor dysfunction. However, sensorimotor control is influenced by spinal and supraspinal mechanisms, necessitating examination of each following ALAS. We aimed to investigate the effects of ALAS on neural excitability during unipedal stance, relating these neural adaptations to clinical outcomes.

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Background/aims: We compared intravenous and subcutaneous infliximab (IFX) as treatment for inflammatory bowel disease (IBD).

Methods: This retrospective, multicenter, observational study enrolled patients treated with either intravenous or subcutaneous IFX. Sequential parameters were compared at baseline, 6 months, and 12 months following the initiation of treatment with either type of IFX.

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Background: Emerging evidence suggests that diet plays a significant role in the development of inflammatory bowel diseases. This study aimed to assess the association between early-life food diversity and the incidence of inflammatory bowel diseases from a nationwide retrospective cohort study in South Korea.

Methods: This study incorporated 1 242 295 South Korean infants who participated in the National Health Insurance Service.

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Background & Aims: Nonalcoholic fatty liver disease (NAFLD) is associated with an increased risk of colorectal cancer (CRC) but has rarely been investigated in adults aged <50 years. We assessed the relationship between NAFLD and early-onset CRC according to anatomical site.

Methods: This population-based cohort study included adults aged 20 to 49 years who underwent health checkups in 2009 under the Korean National Health Insurance Service with follow-up until 2019.

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Background: Clostridioides difficile infection (CDI) frequently occurs concurrently in patients with inflammatory bowel disease (IBD), and differential diagnosis from IBD flares is critical. However, clinical management of C. difficile in IBD patients with polymerase chain reaction toxin-positive (tPCR+)/enzyme immunoassay toxin-negative (tEIA-) results has not yet been investigated.

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Background: Intestinal-type gastric cancer (IGC) and diffuse-type gastric cancer (DGC) exhibit different prevalence rates between sexes. While environmental factors like Helicobacter pylori infection and alcohol consumption contribute to these differences, they do not fully account for them, suggesting a role for host genetic factors.

Methods: We conducted a meta-analysis to explore associations between single nucleotide polymorphisms (SNPs) and the risk of IGC or DGC.

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Article Synopsis
  • Inflammatory bowel disease may lead to a heightened risk of colitis-associated cancer (CAC), which this study investigates using mouse models.
  • TLR3 was examined for its role in CAC, showing that TLR3 knockout mice had more severe colitis and a higher tumor burden compared to wild-type mice.
  • The study concluded that enhancing TLR3 signaling could potentially serve as a therapeutic strategy to mitigate the development of CAC in patients with inflammatory bowel disease.
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  • Antibiotic usage in early life may influence the risk of inflammatory bowel disease (IBD), with a specific focus on ulcerative colitis among South Korean infants.
  • A study involving nearly 3 million infants found that most (87%) used antibiotics within their first year, and this usage was associated with a decreased risk of ulcerative colitis, especially when exposure occurred earlier.
  • The findings suggest that specific antibiotics, particularly penicillin, could potentially play a protective role against IBD, with the results remaining consistent after factoring in dietary influences.
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  • The use of NSAIDs for chronic conditions has led to an increase in NSAID-induced enteropathy, creating a need for effective preventive and treatment strategies.
  • Tegoprazan was tested on human epithelial cells exposed to indomethacin, showing a significant improvement in cell viability and restoration of tight-junction protein levels, which are crucial for intestinal health.
  • The study concluded that tegoprazan protects small intestinal epithelial cells from NSAID-induced damage by enhancing tight junction protein expression and reducing inflammation and cell death.
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  • Thiopurines are used to treat steroid-refractory and steroid-dependent ulcerative colitis, but their early use's effectiveness is debated.
  • A study divided patients into those starting thiopurine therapy within 6 months of diagnosis and those who started later to assess relapse rates.
  • Results showed no significant difference in clinical relapse rates between early and late thiopurine therapy, although extraintestinal manifestations increased relapse risk.
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Purpose: Interest in the quality of life (QoL) of patients with inflammatory bowel disease (IBD) has recently increased. Although measurement tools have been devised for IBD in general, there is no specific tool for measuring the QoL of patients with ulcerative colitis (UC). Therefore, we developed a QoL questionnaire specifically for patients with UC.

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Polycrystalline perovskite light-emitting diodes (PeLEDs) have shown great promise with high efficiency and easy processability. However, PeLEDs using single-cation polycrystalline perovskite emitters have demonstrated low efficiency due to defects within the grains and at the interfaces between the perovskite layer and the charge injection contact. Thus, simultaneous defect engineering of perovskites to suppress exciton loss within the grains and at the interfaces is crucial for achieving high efficiency in PeLEDs.

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is highly associated with poultry and frequently causes foodborne illness worldwide. Thus, effective control measures are necessary to reduce or prevent human infections. In this review, control methods applicable at postharvest level for poultry meat during production, storage, and preparation are discussed.

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Sepsis has a high mortality rate and leads to multi-organ failure, including lung injury. Inactive rhomboid protease family protein (iRhom2) has been identified as accountable for the release of TNF-α, a crucial mediator in the development of sepsis. This study aimed to evaluate the role of iRhom2 in sepsis and sepsis-induced acute lung injury (ALI).

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Reducing the size of perovskite crystals to confine excitons and passivating surface defects has fueled a significant advance in the luminescence efficiency of perovskite light-emitting diodes (LEDs). However, the persistent gap between the optical limit of electroluminescence efficiency and the photoluminescence efficiency of colloidal perovskite nanocrystals (PeNCs) suggests that defect passivation alone is not sufficient to achieve highly efficient colloidal PeNC-LEDs. Here, we present a materials approach to controlling the dynamic nature of the perovskite surface.

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While two-dimensional transition metal dichalcogenides (TMDCs)-based photodetectors offer prospects for high integration density and flexibility, their thinness poses a challenge regarding low light absorption, impacting photodetection sensitivity. Although the integration of TMDCs with metal halide perovskite nanocrystals (PNCs) has been known to be promising for photodetection with a high absorption coefficient of PNCs, the low charge mobility of PNCs delays efficient photocarrier injection into TMDCs. In this study, we integrated MoS with in situ formed core/shell PNCs with short ligands that minimize surface defects and enhance photocarrier injection.

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Background/aims: The prevalence and incidence of ulcerative colitis (UC) in Korea is increasing. Each patient has a different disease course and treatment response. Recently, with the development of biologic agents, histological remission has become a treatment goal.

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Bioelectronics integrates electronics with biological organs, sustaining the natural functions of the organs. Organs dynamically interact with the external environment, managing internal equilibrium and responding to external stimuli. These interactions are crucial for maintaining homeostasis.

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Article Synopsis
  • Inflammatory bowel disease (IBD), once seen primarily in Western countries, is now on the rise in Asia, with notable differences in how it affects populations there compared to the West.
  • This study focused on South Korea, analyzing data from 2010 to 2018 to assess new cases, incidence rates, medication trends, and clinical outcomes of Crohn's disease (CD) and ulcerative colitis (UC).
  • Results showed that CD incidence has stabilized, while UC rates are increasing, particularly among younger patients, and there has been a shift towards using more modern treatments like immunomodulators and biologics, resulting in improved clinical outcomes over time.*
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The development of advanced materials capable of autonomous self-healing and mechanical stimulus sensing in aquatic environments holds great promise for applications in underwater soft electronics, underwater robotics, and water-resistant human-machine interfaces. However, achieving superior autonomous self-healing properties and effective sensing simultaneously in an aquatic environment is rarely feasible. Here, we present an ultrafast underwater molecularly engineered self-healing piezo-ionic elastomer inspired by the cephalopod's suckers, which possess self-healing properties and mechanosensitive ion channels.

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Background: Acute lateral ankle sprains (ALAS) are associated with long-term impairments and instability tied to altered neural excitability. Arthrogenic muscle inhibition (AMI) has been observed in this population; however, relationships with injury-related impairments are unclear, potentially due to the resting, prone position in which AMI is typically measured. Assessing AMI during bipedal stance may provide a better understanding of this relationship.

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It has been reported that migraine is more common in patients with inflammatory bowel disease (IBD) than in general. However, the impact of migraine on the development of IBD has not yet been elucidated. The aim of this study was to determine the association between migraine and the development of IBD.

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