Publications by authors named "S-W Park"

Background Deep learning (DL) methods can improve accelerated MRI but require validation against an independent reference standard to ensure robustness and accuracy. Purpose To validate the diagnostic performance of twofold-simultaneous-multislice (SMSx2) twofold-parallel-imaging (PIx2)-accelerated DL superresolution MRI in the knee against conventional SMSx2-PIx2-accelerated MRI using arthroscopy as the reference standard. Materials and Methods Adults with painful knee conditions were prospectively enrolled from December 2021 to October 2022.

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Objective: To investigate baseline and change of pulmonary damage biomarkers (serum Krebs von den Lungen 6 [KL-6], human surfactant protein D [hSP-D], and matrix metalloproteinase 7 [MMP-7]) with rheumatoid arthritis-associated interstitial lung disease (RA-ILD) progression.

Methods: In the Korean Rheumatoid Arthritis Interstitial Lung Disease (KORAIL) cohort, a prospective cohort, we enrolled patients with RA and ILD confirmed by chest computed tomography imaging and followed annually. ILD progression was defined as worsening in physiological and radiological domains of the 2022 American Thoracic Society, European Respiratory Society, Japanese Respiratory Society, and Latin American Thoracic Society guideline for progressive pulmonary fibrosis (PPF).

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Background: Hemophilia A is caused by coagulation factor VIII (FVIII) deficiency and increases bleeding risk during invasive procedures.

Objectives: To investigate FVIII concentrate use and bleeding outcomes for invasive procedures after valoctocogene roxaparvovec gene transfer.

Design: This manuscript presents post hoc analysis of the phase III GENEr8-1 trial.

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Background: Pulmonary vein isolation (PVI) alone is less effective in patients with persistent atrial fibrillation (AF) compared with those with paroxysmal AF. We investigate whether additional linear ablation from the superior vena cava to the right atrial septum and cavotricuspid isthmus ablation improves the rhythm outcome of patients with persistent AF undergoing cryoballoon PVI (Cryo-PVI).

Methods: In this investigator-initiated, multicenter, randomized clinical trial, 289 patients with persistent AF refractory to antiarrhythmic drug therapy were randomized 1:1 to either Cryo-PVI with additional right atrium (RA) linear ablation or Cryo-PVI alone.

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Purpose: To describe the medial-sided pathoanatomy and ligament injuries in acute MLKIs with medial-sided involvement andlook forassociated injury patterns based upon location of ligamentous injury.

Methods: Patients who underwent treatment for MLKI at two level-1 trauma centers were identified between January 2001 and May 2023. Only cases involvingcomplete disruption of the superficial medial collateral ligament (sMCL) were included.

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Adrenomyeloneuropathy is a progressive neurodegenerative disease caused by pathogenic variants in the gene, resulting in very-long-chain fatty acid (VLCFA) accumulation that leads to dying-back axonopathy. Our candidate gene therapy, SBT101 (AAV9-human [h]), aims to ameliorate pathology by delivering functional copies of h to the spinal cord. Transduced cells produce functional ABCD1 protein, thereby repairing the underlying biochemical defect.

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Article Synopsis
  • - The immune system relies on both innate and adaptive responses to fight pathogens, and individuals with weakened immune systems require effective methods to enhance their immune function.
  • - This study investigates the effects of the probiotic OTG1204 on macrophages, crucial for immune defense, specifically examining its potential to stimulate the immune response in conditions of immunosuppression induced by cyclophosphamide (CTX).
  • - Results showed that OTG1204 activated macrophages, increasing important signaling molecules and cytokines through specific pathways, and helped restore immune function in immunosuppressed mice by improving immune cell populations and overall health indicators.
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  • The study investigates how patients with Parkinson's disease (PD) learn new motor skills compared to age-matched controls during a virtual throwing task.
  • Both groups improved their performance over three days, but they exhibited different motor learning processes: PD patients started with a slower ball release velocity that increased with practice, while controls began with a faster release that stabilized at a lower rate.
  • The research highlights the need to examine various aspects of the learning process to better understand motor skill acquisition in PD, potentially aiding in the development of better rehabilitation strategies.
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  • Leucine-rich repeat kinase 2 (LRRK2) and α-synuclein play significant roles in the development of Parkinson's disease, particularly through their impact on neuroinflammation and oxidative stress.
  • In this study, a marine algal extract was found to inhibit LRRK2 activity, reduce inflammatory responses in microglial cells, and prevent α-synuclein fibril formation related to Parkinson's pathology.
  • The extract also enhanced lysosomal function in human dopaminergic neurons and slightly improved cell survival in a model of oxidative stress induced by rotenone.
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Toll-like receptors (TLRs) are critical regulators of the immune system, and altered TLR responses lead to a variety of inflammatory diseases. Interference of intracellular TLR signaling, which is mediated by multiple Toll/interleukin-1 receptor (TIR) domains on all TLRs and TLR adapters, is an effective therapeutic strategy against immune dysregulation. Peptides that inhibit TIR-TIR interactions by fragmenting interface residues have potential as therapeutic decoys.

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Muscle atrophy detrimentally impacts health and exacerbates physical disability, leading to increased mortality. In particular, sarcopenia, aging-related degenerative muscle loss, necessitates urgent remedies. Current approaches for treating muscle atrophy include exercise and nutrition, while drug exploration remains in its early stages.

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Background: Current guidelines recommend intervention for asymptomatic rheumatic mitral stenosis (MS) with mitral valve area ≤1.5 cm based on indicators including pulmonary arterial systolic pressure (PASP) >50 mm Hg and new-onset atrial fibrillation; however, evidence supporting this is lacking.

Methods: This single-center retrospective study included patients with rheumatic MS between 2006 and 2022.

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The COVID-19 pandemic has significantly influenced various aspects of society, including environmental factors such as methane emissions. This study investigates the changes in methane concentrations in Seoul, South Korea, from 2019 to 2023, using TROPOMI satellite data and rigorous statistical analyses. The normality of the sample data is first assessed using the Shapiro-Wilk (S-W) and Kolmogorov-Smirnov (K-S) tests, indicating that the data can be considered to come from a normal distribution.

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Background: Crohn's disease (CD) exhibits variability in colorectal cancer (CRC) incidence and prognostic factors due to diverse clinical and behavioral characteristics, presenting inconsistencies between Western and Eastern patients.

Objectives: This study compared clinical characteristics between CD patients with CRC from the US and Korean tertiary referral centers and defined the prognostic factors related to mortality.

Design: Retrospective study.

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Background: Social risk screening during inpatient care is required in new CMS regulations, yet its impact on inpatient care and patient outcomes is unknown.

Objectives: To evaluate whether implementing a social risk screening protocol improves discharge processes, patient-reported outcomes, and 30-day service use.

Research Design: Pragmatic mixed-methods clinical trial.

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Epithelial-to-mesenchymal transitions (EMTs) and extracellular matrix (ECM) remodeling are distinct yet important processes during carcinoma invasion and metastasis. Transforming growth factor β (TGF-β) and RAS, signaling through SMAD and RAS-responsive element-binding protein 1 (RREB1), jointly trigger expression of EMT and fibrogenic factors as two discrete arms of a common transcriptional response in carcinoma cells. Here, we demonstrate that both arms come together to form a program for lung adenocarcinoma metastasis and identify chromatin determinants tying the expression of the constituent genes to TGF-β and RAS inputs.

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Purpose: This study aimed to assess the risk of ocular adverse events, including retinal artery occlusion (RAO), retinal vein occlusion (RVO), noninfectious uveitis (NIU), noninfectious scleritis (NIS), optic neuritis (ON), ischemic optic neuropathy (ION), and ocular motor cranial nerve palsy (OMCNP), following Coronavirus Disease 2019 (COVID-19) vaccination.

Design: Population-based self-controlled case series METHODS: This study utilized nationwide claims and vaccination data provided by the Korea National Health Insurance Service and Korea Disease Control and Prevention Agency. From the entire South Korean population of 52 million individuals, patients with incident RAO, RVO, anterior NIU, nonanterior NIU, NIS, ON, ION, or OMCNP between January 2021 and March 2022 were included.

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Article Synopsis
  • FGFR genomic alterations are found in 5-10% of human cancers, and erdafitinib has shown promise in treating various advanced solid tumors but its effectiveness in Asian patients was unclear.
  • A phase IIa study was conducted to assess the efficacy of erdafitinib in Asian patients with FGFR-altered advanced cholangiocarcinoma, non-small cell lung cancer (NSCLC), and esophageal cancer by evaluating various response rates and survival metrics.
  • Results indicated a 40.9% objective response rate in cholangiocarcinoma patients, while NSCLC did not show any objective responses; however, all patients experienced adverse effects, highlighting the need for further safety assessment.
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Aims: Recently, deep learning artificial intelligence (AI) models have been trained to detect cardiovascular conditions, including hypertrophic cardiomyopathy (HCM), from the 12-lead electrocardiogram (ECG). In this external validation study, we sought to assess the performance of an AI-ECG algorithm for detecting HCM in diverse international cohorts.

Methods And Results: A convolutional neural network-based AI-ECG algorithm was developed previously in a single-centre North American HCM cohort (Mayo Clinic).

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Notch ligands [jagged (JAG) and, delta-like (DLL) families] and receptors [NOTCH family] are key regulators of Notch signaling. NOTCH signaling contributes to vascular development, tissue homeostasis, angiogenesis, and cancer progression. To elucidate the universal functions of the JAG, DLL, and NOTCH families and their connections with various biological functions, we examined 15 types of cancer using The Cancer Genome Atlas clinical database.

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  • A study was conducted to develop deep learning algorithms for the automatic segmentation of white matter hyperintensity (WMH) lesions in patients with cerebral infarction, involving a large dataset of 8,421 patients from multiple hospitals in Korea.
  • Two models, 2D UNet and SE-Unet, were trained and validated using FLAIR MRI images, with performance measured against a human-segmented gold standard using various statistical metrics.
  • Results showed that while both models had good performance, the SE-Unet outperformed the UNet with higher average Dice Similarity Coefficients (DSCs) in both internal and external validations, indicating it was more reliable for WMH segmentation.
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Background And Purpose: Hereditary hemorrhagic telangiectasia (HHT) is an autosomal dominant disease that causes vascular malformations in a variety of organs and tissues, including brain AVMs. Because brain AVMs have the potential to cause disabling or fatal intracranial hemorrhage, detection of these lesions before rupture is the goal of screening MR imaging/MRA examinations in patients with HHT. Prior studies have demonstrated superior sensitivity for HHT-related brain AVMs by using postcontrast MR imaging sequences as compared with MRA alone.

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Article Synopsis
  • - Severe fever with thrombocytopenia syndrome (SFTS) is a serious emerging infection in South Korea with a case fatality rate of about 16.8%, which has notably increased since its initial endemic phase from 2016 to 2021.
  • - Key complications among patients include bleeding, hemophagocytic lymphohistiocytosis, and infections like bacteremia and invasive pulmonary aspergillosis, with rapid clinical deterioration observed within days of hospital admission.
  • - Factors contributing to higher fatality rates include older age, co-infections at admission, and specific lab results, highlighting the urgent need for effective treatments beyond supportive care.
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Background: Atrial fibrillation (AF) can lead to stroke, heart failure, and mortality and has a greater prevalence in dialysis patients than in the general population. Several studies have suggested that uremic toxins may contribute to the development of AF. However, the association between dialysis adequacy and incident AF has not been well established.

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