Publications by authors named "Hyungjoo Kim"

Background: Cardiac surgery patients are at increased risk for venous thromboembolism (VTE). Prevention is the most critical strategy to reduce VTE-associated morbidity and death. However, there is a lack of data on the optimal approach to VTE prophylaxis in this population of high-risk patients.

View Article and Find Full Text PDF
Article Synopsis
  • Obesity is linked to more frequent and aggressive cancers, particularly colorectal cancer (CRC), due to specific immune cell (macrophage) behaviors in tumor environments.* -
  • Researchers discovered that oleic acid leads to tumor cell acid production, which attracts and activates macrophages, speeding up tumor growth through signaling via the GPR65 receptor.* -
  • Increased GPR65 expression was found in tumors of obese patients with CRC and hepatocellular carcinoma (HCC), indicating its potential as a therapeutic target for obesity-related cancers.*
View Article and Find Full Text PDF

Objectives: Given both the short- and long-term deleterious effects of opioids, there has been an increased focused on reducing the use of postoperative opioid analgesia. As patients undergoing cardiac surgery often require high levels opioids postoperatively, understanding risk factors for increased postoperative opioid use may be helpful for the development of patient-specific opioid-sparing pain regimens for this patient population.

Design: A retrospective analysis of data from our electronic medical records and the Society of Thoracic Surgeon's database.

View Article and Find Full Text PDF

Objective: To assess whether bioimpedance spectroscopy analysis (BIA) can be used as a tool to guide postoperative fluid management in patients undergoing cardiac surgery.

Design: An observational study.

Setting: A single tertiary hospital.

View Article and Find Full Text PDF

Challenges in directed differentiation and survival limit the clinical use of stem cells despite their promising therapeutic potential in regenerative medicine. Nanotechnology has emerged as a powerful tool to address these challenges and enable precise control over stem cell fate. In particular, nanomaterials can mimic an extracellular matrix and provide specific cues to guide stem cell differentiation and proliferation in the field of nanotechnology.

View Article and Find Full Text PDF

Objectives: To compare the outcomes of factor eight inhibitor bypassing activity (FEIBA) versus fresh frozen plasma (FFP) as the primary treatment for postoperative coagulopathy in patients undergoing cardiac surgery.

Design: A retrospective, propensity-matched study.

Setting: A single, tertiary hospital.

View Article and Find Full Text PDF

Cysteine-rich angiogenic inducer 61 (CYR61) is a protein from the CCN family of matricellular proteins that play diverse regulatory roles in the extracellular matrix. CYR61 is involved in cell adhesion, migration, proliferation, differentiation, apoptosis, and senescence. Here, we show that CYR61 induces chemoresistance in triple-negative breast cancer (TNBC).

View Article and Find Full Text PDF

Platelet-derived growth factor receptor (PDGFR) plays an essential role in the proliferation and invasion of malignant cancer cells. However, the functional role of PDGFR alpha (PDGFRA) in HER2-positive (HER2+) breast cancer has not been fully clarified yet. Thus, the objective of this study was to investigate the clinical significance of PDGFRA and the therapeutic potential of PDGFR inhibitors as part of an effort to overcome trastuzumab (TRZ) resistance.

View Article and Find Full Text PDF

Cystic echinococcosis (CE) is a representative neglected tropical disease (NTD) with increased morbidity and mortality but is ignored and overlooked in developed countries. Serological and radiographic findings are helpful in distinguishing these parasites; however, conflicting results of these can make it difficult to diagnose if medical knowledge of hepatic parasitic disease, including the etiology, features of imaging, and immunodiagnostic test, is not acquired. We report the case of a male patient with dyspepsia and right epigastric pain who had positive results for cysticercosis antibodies on immunodiagnostic examination.

View Article and Find Full Text PDF

Background/aim: Chemokine (C-C motif) ligand 2 (CCL2) influences growth and metastasis and is associated with poor prognosis in various cancers. However, the regulatory mechanism of CCL2 induction by human epidermal growth factor receptor 2 (HER2) is not fully understood in breast cancer. Thus, we investigated how CCL2 expression is regulated in HER2-positive (HER2+) breast cancer.

View Article and Find Full Text PDF
Article Synopsis
  • Triple-negative breast cancer (TNBC) is a highly aggressive form of breast cancer characterized by poor outcomes due to rapid growth and the ability to spread.
  • Research discovered that the protein CCN3 is overexpressed in TNBC, and its knockdown led to reduced cancer stem cell formation, tumor growth, and metastasis in laboratory models.
  • The study found that CCN3 promotes the expression of GPNMB, which activates the EGFR/MAPK signaling pathway, and also enhances Wnt signaling, indicating that CCN3 could be targeted for developing new therapies for TNBC.
View Article and Find Full Text PDF

Basal-like breast cancer (BLBC) has a clinically aggressive nature. It is prevalent in young women and is known to often relapse rapidly. To date, the molecular mechanisms regarding the aggressiveness of BLBC have not been fully understood.

View Article and Find Full Text PDF

Despite advances in predicting physical peptide-major histocompatibility complex I (pMHC I) binding, it remains challenging to identify functionally immunogenic neoepitopes, especially for MHC II. By using the results of >36,000 immunogenicity assay, we developed a method to identify pMHC whose structural alignment facilitates T cell reaction. Our method predicted neoepitopes for MHC II and MHC I that were responsive to checkpoint blockade when applied to >1,200 samples of various tumor types.

View Article and Find Full Text PDF

Immune checkpoint blockades (ICBs) have revolutionized cancer treatment. Recent studies have revealed a subset of triple-negative breast cancer (TNBC) to be considered as an immunogenic breast cancer subtype. Characteristics of TNBC, such as higher mutation rates and number of tumor-infiltrating immune cells, render the immunogenic phenotypes.

View Article and Find Full Text PDF

The proactive safety seat (PSS) is a recently developed active safety system for securing occupant safety in out-of-seat position (OOSP), which was applied in the Hyundai Genesis G80 in 2020. However, there has not been sufficient quantifiable verification supporting the effectiveness of the PSS. The present study was performed to determine the effectiveness of the PSS for occupant safety in OOSP and to identify areas for additional improvement.

View Article and Find Full Text PDF

Particulate matter has been increasing worldwide causing air pollution and serious health hazards. Owing to increased time spent indoors and lifestyle changes, assessing indoor air quality has become crucial. This study investigated the effect of watering and drought and illumination conditions (constant light, light/dark cycle, and constant dark) on particulate matter2.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates the effects of extracts from a halophyte plant, specifically focusing on the dichloromethane (DCM) fraction, on colorectal cancer cells (HT-29) and explores its potential bioactive properties.
  • The DCM fraction demonstrated significant dose- and time-dependent inhibitory effects on cell viability, leading to increased apoptosis through changes in apoptosis-related proteins and mitochondrial membrane potential.
  • Additionally, the treatment with DCM caused S-phase arrest in the cell cycle, implying that this extract has the potential to inhibit cancer cell growth and induce cell death.
View Article and Find Full Text PDF

To develop a wrist robotic exoskeleton-type interface (REI) for force interaction, it should have a suitable range of motion similar to human wrist activities of daily living, large torque output performance, and low moving parts inertia for dynamic motion response to cover the human behavior frequency. In this paper, a wrist REI based on a fully actuated coaxial spherical parallel mechanism (CSPM) is proposed to satisfy the aforementioned features. The fully actuated CSPM-based wrist REI (FC-WREI) has the characteristics of pure rotation similar to the human wrist, high torque output by parallel torque synthesis, and low moving parts inertia due to the base arrangement of the actuators.

View Article and Find Full Text PDF

The seat comfort of automobiles is one of the significant factors for determining the driver's fatigue, emotional experience, and individual space (which captures their individuality, rather than just a means of transportation in modern society). Conventional automobile seats could not provide seating comfort suitable for all drivers, in the form of seats that fit each driver's body type and the difficulty of meeting individual needs. This study proposes self-shape adjustable (the SSA seats) seats that improve the sitting comfort, safety, and secure the stability, by adjusting shape fit to the driver's body type.

View Article and Find Full Text PDF

Plant polyphenols are widely used to treat various inflammatory diseases, owing to their ability to suppress reactive oxygen species production and the expression of inflammatory cytokines. Herein, we investigated phenolic compounds from using UPLC Q-TOF MS/MS and their antioxidative and anti-inflammatory activities were analyzed. The .

View Article and Find Full Text PDF

A complete hydrodeoxygenation(HDO) of vanillin to yield cycloalkanes was performed using bifunctional Ru loaded HZSM-5 catalysts with different metal loadings (0.1, 0.5, 1, 3, and 5 wt%) and Si/Al ratios (Si/Al = 23,300) in n-octane/water biphasic system.

View Article and Find Full Text PDF

The occupant's posture can be changeable to an inadvertent or unintentional out-of-seat position (OOSP) depend on their convenience. Understanding for OOSP has been demanded, but it is not sufficient; especially when AEB is activated. The aim of the current study was to characterize the motion responses of an occupant in various OOSPs when AEB is activated and to identify if there were any additional risks of injury or discomfort to the occupant.

View Article and Find Full Text PDF

About 70% of breast cancers overexpress estrogen receptor α (ERα, encoded by ESR1). Tamoxifen, a competitive inhibitor of estrogen that binds to ER, has been widely used as a treatment for ER-positive breast cancer. However, 20-30% of breast cancer is resistant to tamoxifen treatment.

View Article and Find Full Text PDF

Biochar was produced by the pyrolysis of Kraft lignin at 600 °C followed by modification with CO at 700 and 800 °C and impregnation with FeOx. The physicochemical properties and arsenic (V) adsorption performance of biochar were evaluated. The characteristics of the lignin biochar before and after CO modification and FeOx impregnation were analyzed using the following methods: proximate and ultimate analysis, specific surface area (Brunauer-Emmett-Teller (BET) surface area), porosity, scanning electron microscopy and energy dispersive spectroscopy mapping, Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy.

View Article and Find Full Text PDF

In this study, the physicochemical properties of modified biochar using different methods, such as physical (CO₂, steam) and chemical (KOH and H₃PO₄) methods, were estimated by X-ray diffraction, N₂ adsorption-desorption, field-emission scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy. The performance of chars was evaluated using a Cr adsorption performance test. Among various chars modified in this study, CHC-P modified by H₃PO₄ showed the highest chromium adsorption efficiency.

View Article and Find Full Text PDF