Publications by authors named "Mi-hyun Kim"

Tumor-derived extracellular vesicle (tEV)-associated RNAs hold promise as diagnostic biomarkers, but their clinical use is hindered by the rarity of tEVs among nontumor EVs. Here, we present EV-CLIP, a highly sensitive droplet-based digital method for profiling EV RNA. EV-CLIP utilizes the fusion of EVs with charged liposomes (CLIPs) in a microfluidic chip.

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RET receptor tyrosine kinase is crucial for nerve and tissue development but can be an important oncogenic driver. This study focuses on exploring the design principles of potent RET inhibitors through molecular docking and 3D-QSAR modeling of 5,6-fused bicyclic heteroaromatic derivatives. First of all, RET inhibitors of 49 different bicyclic substructures were collected from five different data sources and selected through molecular docking simulations.

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Various combination therapies have been investigated to overcome the limitations of using immune checkpoint inhibitors. However, determining the optimal combination therapy remains challenging. To overcome the therapeutical limitation, we conducted a translational research to elucidate the mechanisms by which AXL inhibition enhances the anti-tumor effects when combined with anti-PD-1 antibody therapy.

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  • The study analyzed the immune cell and stromal components of the tumor microenvironment in non-small cell lung cancer (NSCLC) at a single-cell level using scRNA-seq data from 21 patients.
  • Results revealed two mutation clusters, showing distinct immune responses based on specific oncogene mutations, with one cluster having higher lymphoid structure scores and the other exhibiting alternative immune pathway expressions.
  • The findings suggest a strong link between mutation types and the tumor microenvironment, potentially guiding personalized treatment strategies for NSCLC.
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CNS Drug discovery has been challenging due to the lack of clarity on CNS diseases' basic biological and pathological mechanisms. Despite the difficulty, some CNS drugs have been developed based on phenotypic effects. Herein, we propose a phenotype-structure relationship model, which predicts an anti-neuroinflammatory potency based on 3D molecular structures of the phenotype-active or inactive compounds without specifying targets.

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  • The study assessed the effectiveness of different sampling methods for next-generation sequencing (NGS) in lung cancer diagnostics, based on data from patients at Pusan National University Hospital.
  • Overall, NGS yielded a high success rate of 97.5% across 319 patients, with no significant differences in DNA sequencing success between surgical (98%) and nonsurgical (96.4%) methods.
  • However, surgical methods had a lower success rate for RNA sequencing (78%) compared to nonsurgical methods (92.3%), suggesting a need for improved protocols to mitigate RNA degradation during surgical sampling.
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  • The study investigated the effectiveness of patient-performed rapid antigen tests (RATs) in detecting COVID-19 variants Delta and Omicron during the pandemic, particularly in self-testing scenarios in Korea.
  • Researchers conducted a multicenter clinical study involving participants without prior diagnostic experience and compared RAT results with the more accurate reverse transcriptase-polymerase chain reaction (RT-PCR) testing.
  • Results showed that RATs were better at detecting the Omicron variant, while their performance for Delta was lower, especially among those who were only partially vaccinated, highlighting the need for careful use of these tests in different vaccination contexts.
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  • The study investigates the effects of durvalumab consolidation therapy on patients with non-small cell lung cancer (NSCLC) who have either mutant (EGFR M+) or wild-type (EGFR M-) epidermal growth factor receptors, specifically looking at programmed death-ligand 1 (PD-L1) expression levels.
  • Of the 249 unresectable stage III NSCLC patients treated, only 12.4% had EGFR M+, with the median progression-free survival (PFS) being significantly longer in patients with high PD-L1 expression (≥50%) compared to those with EGFR M+ and low PD-L1 expression.
  • The findings suggest that durvalumab can be beneficial for EGFR M+
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Actionable mutations of RET kinase have been identified as oncogenic drivers of solid tumors, including thyroid cancer, metastatic colorectal cancer, and nonsmall cell lung cancer. Although multikinase inhibitors and RET selective inhibitors are used to treat patients with RET alterations, there is insufficient research addressing certain issues: which actionable mutations arise from these therapies, how to improve the clinical response rate to RET inhibitors, and how to design new inhibitors to overcome drug resistance. Therefore, the development of sophisticated tool compounds is required to investigate the molecular mechanisms of actionable mutations and to develop breakthrough therapeutics for different RET alterations.

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Purpose: Invasive mucinous adenocarcinoma (IMA) of the lungs is a rare subtype of lung adenocarcinoma with a limited understanding of its prognosis, particularly in advanced stages. This study aimed to assess the prognosis of patients with advanced IMA by focusing on treatment modalities.

Methods: This single-center retrospective study evaluated 33 patients with IMAs diagnosed with advanced-stage disease or disease progression after curative treatment between 2011 and 2021.

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  • The study aims to enhance the identification of various immune cells by analyzing both protein and mRNA expression patterns, focusing on the complex immune landscape in cancer ecosystems.
  • A total of 94,674 peripheral blood mononuclear cells (PBMCs), including 32,412 T cells, were analyzed using CITE-seq data, employing techniques like quality control, principal component analysis, and clustering visualization.
  • The results revealed that specific T cell subsets could be better distinguished using protein markers and novel mRNA correlations, leading to improved understanding of immune cell diversity and responses in health and disease.
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Purpose: The use of neoadjuvant anaplastic lymphoma kinase (ALK)-tyrosine kinase inhibitors (TKIs) has not been extensively explored. The current case report highlights the notable pathological complete response (pCR) achieved following neoadjuvant brigatinib therapy in a patient with stage IIIA ALK-positive non-small cell lung cancer (NSCLC).

Case Presentation: A 32-year-old male presented with incidental lung lesions, ultimately diagnosed as clinical stage T3N1M0, IIIA NSCLC with an gene rearrangement.

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  • The study focused on testing INV-001 for visualizing lymphatic vessels and nodes in beagles using magnetic resonance lymphangiography (MRL) without impacting venous systems.
  • An adaptive dose-finding study was performed on six beagles, determining that the optimal dose for clear visualization was 0.056 mg Fe/kg at a concentration of 15 mM, showing effective enhancement within 30 minutes of administration.
  • No toxicity was observed, and analysis of liver and kidney T, T, and T* values 48 hours later indicated complete excretion of INV-001, confirming its safety and effectiveness for the intended application.
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Purpose: Gadolinium (Gd)-based contrast agents are primarily used for contrast-enhanced magnetic resonance lymphangiography (MRL). However, overcoming venous contamination issues remains challenging. This study aims to assess the MRL efficacy of the newly developed iron-based contrast agent (INV-001) that is specially designed to mitigate venous contamination issues.

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  • The Aryl hydrocarbon receptor (AhR) is a key transcription factor involved in tumor progression and immune response, but its distribution in tumors and immune cells is not well understood.
  • This study utilized advanced techniques to analyze AhR expression in 513 patient samples, revealing that it is mainly found in cancer cells, with some presence in immune cells like T cells and macrophages.
  • The results categorized AhR expression patterns by cancer type, particularly highlighting high levels in regulatory T cells in non-small cell lung cancer, providing insights for future clinical trials on AhR-targeting therapies.
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Background: International guidelines recommend the use of local therapy (LT) to limited progression in patients with epidermal growth factor receptor (EGFR)-mutated advanced non-small cell lung cancer (NSCLC). However, the use of LT before disease progression has not been extensively analyzed. This meta-analysis evaluates the efficacy and safety of administering additional LT in conjunction with first-line EGFR-tyrosine kinase inhibitors (TKIs) before disease progression in patients with EGFR-mutated advanced NSCLC.

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G-protein-coupled receptors (GPCRs) mediate diverse cell signaling cascades after recognizing extracellular ligands. Despite the successful history of known GPCR drugs, a lack of mechanistic insight into GPCR challenges both the deorphanization of some GPCRs and optimization of the structure-activity relationship of their ligands. Notably, replacing a small substituent on a GPCR ligand can significantly alter extracellular GPCR-ligand interaction patterns and motion of transmembrane helices in turn to occur post-binding events of the ligand.

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Introduction: To understand the immune system within the tumor microenvironment (TME) of non-small cell lung cancer (NSCLC), it is crucial to elucidate the characteristics of molecules associated with T cell activation.

Methods: We conducted an in-depth analysis using single-cell RNA sequencing data obtained from tissue samples of 19 NSCLC patients. T cells were classified based on the Tumor Proportion Score (TPS) within the tumor region, and molecular markers associated with activation and exhaustion were analyzed in T cells from high TPS areas.

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  • Silver (Ag) metal structures show great potential for advanced photonics and electronics due to their high reflectivity, conductivity, and unique properties, but they are vulnerable to damage from S ions in the environment.
  • The study develops a method using (3-mercaptopropyl)trimethoxysilane (MPTS) ligands to protect Ag structures from deterioration caused by sulfur exposure, ensuring their performance remains stable.
  • This approach allows for highly sustainable Ag structures across various dimensions while potentially reducing electronic waste and its environmental impact.
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Background And Objective: Next-generation sequencing (NGS) analysis is considered standard for lung cancer diagnosis in clinical practice. Little is known about the feasibility of NGS using tumour tissue sampled with a 1.1 mm-diameter cryoprobe.

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Aims: Hepatic fibrosis is a dynamic process characterized by the net accumulation of an extracellular matrix resulting from chronic liver injury such as nonalcoholic steatohepatitis. Activation of hepatic stellate cells (HSCs) plays a role in transdifferentiation of quiescent cells into fibrogenic myofibroblasts. We aimed to examine the function of retinoic acid receptor-related orphan receptor alpha (RORα) and its novel agonistic ligand, 1-(4-benzyloxybenzyl)-3-(2-dimethylaminoethyl)-thiourea (ODH-08) against activation of HSCs using hepatic fibrosis mouse models.

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We propose a self-supervised machine learning (ML) algorithm for sequence-type classification of brain MRI using a supervisory signal from DICOM metadata (i.e., a rule-based virtual label).

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  • Polo-like kinase 1 (PLK1) is a key player in regulating the cell cycle and is a promising target for cancer treatment.
  • A new compound, DD-2, has been developed using the N-degron pathway to selectively degrade PLK1 in cancer cells, showing strong anticancer effects in lab tests.
  • In studies with mouse models, DD-2 not only inhibited tumor growth but also worked well in combination with the tyrosine kinase inhibitor osimertinib, suggesting it may enhance current cancer therapies.
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Purpose: Radial probe endobronchial ultrasound (RP-EBUS) accurately locates peripheral lung lesions (PLLs) during transbronchial biopsy (TBB). We performed an updated meta-analysis of the diagnostic yield of TBB for PLLs using RP-EBUS to generate recommendations for the development of the Korean Association of Lung Cancer guidelines.

Materials And Methods: We systematically searched MEDLINE and EMBASE (from January 2013 to December 2022), and performed a meta-analysis using R software.

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Target identification is a crucial process in drug development, aiming to identify key proteins, genes, and signal pathways involved in disease progression and their relevance in potential therapeutic interventions. While C-C chemokine receptor 8 (CCR8) has been investigated as a candidate anti-cancer target, comprehensive multi-omics analyzes across various indications are limited. In this study, we conducted an extensive bioinformatics analysis integrating genomics, proteomics, and transcriptomics data to establish CCR8 as a promising anti-cancer drug target.

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