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Kim NI, Lee J, Jin S, Park J, Jeong JY, Lee J, Kim Y, Kim C, Choi SM. Synergistic Effects in LaNiO 3 Perovskites between Nickel and Iron Heterostructures for Improving Durability in Oxygen Evolution Reaction for AEMWE. Small Methods 2024:e2400284. [PMID: 38651527 DOI: 10.1002/smtd.202400284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 04/09/2024] [Indexed: 04/25/2024]
Abstract
Perovskite materials that aren't stable during the oxygen evolution reaction (OER) are unsuitable for anion-exchange membrane water electrolyzers (AEMWE). But through manipulating their electronic structures, their performance can further increase. Among the first-row transition metals, nickel and iron are widely recognized as prominent electrocatalysts; thus, the researchers are looking into how combining them can improve the OER. Recent research has actively explored the design and study of heterostructures in this field, showcasing the dynamic exploration of innovative catalyst configurations. In this study, a heterostructure is used to manipulate the electronic structure of LaNiO3 (LNO) to improve both OER properties and durability. Through adsorbing iron onto the LNO (LNO@Fe) as γ iron oxyhydroxide (γ-FeOOH), the binding energy of nickel in the LNO exhibited negative shifts, inferring nickel movement toward the metallic state. Consequently, the electrochemical properties of LNO@Fe are further improved. LNO@Fe showed excellent performance (1.98 A cm-2, 1 m KOH, 50 °C at 1.85 V) with 84.1% cell efficiency in AEMWE single cells, demonstrating great improvement relative to LNO. The degradation for the 850 h durability analysis of LNO@Fe is ≈68 mV kh-1, which is ≈58 times less than that of LNO.
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Affiliation(s)
- Nam In Kim
- Department of Hydrogen Energy Materials, Surface & Nano Materials Division, Korea Institute of Materials Science (KIMS), Changwon, 51508, Republic of Korea
- Department of Materials Science and Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Jaehun Lee
- Department of Hydrogen Energy Materials, Surface & Nano Materials Division, Korea Institute of Materials Science (KIMS), Changwon, 51508, Republic of Korea
| | - Song Jin
- Department of Hydrogen Energy Materials, Surface & Nano Materials Division, Korea Institute of Materials Science (KIMS), Changwon, 51508, Republic of Korea
| | - Junyoung Park
- Department of Hydrogen Energy Materials, Surface & Nano Materials Division, Korea Institute of Materials Science (KIMS), Changwon, 51508, Republic of Korea
| | - Jae-Yeop Jeong
- Department of Hydrogen Energy Materials, Surface & Nano Materials Division, Korea Institute of Materials Science (KIMS), Changwon, 51508, Republic of Korea
| | - Jooyoung Lee
- Department of Hydrogen Energy Materials, Surface & Nano Materials Division, Korea Institute of Materials Science (KIMS), Changwon, 51508, Republic of Korea
| | - Yangdo Kim
- Department of Materials Science and Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Chiho Kim
- Department of Hydrogen Energy Materials, Surface & Nano Materials Division, Korea Institute of Materials Science (KIMS), Changwon, 51508, Republic of Korea
| | - Sung Mook Choi
- Department of Hydrogen Energy Materials, Surface & Nano Materials Division, Korea Institute of Materials Science (KIMS), Changwon, 51508, Republic of Korea
- Advanced Materials Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
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Kwon SW, Park J, Baek DJ, Kim H, Choi SS, Kwon JH, An J. What do we know about dermal bioaccessibility of metals coated on antibacterial films? Ecotoxicol Environ Saf 2024; 274:116213. [PMID: 38493702 DOI: 10.1016/j.ecoenv.2024.116213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/26/2024] [Accepted: 03/12/2024] [Indexed: 03/19/2024]
Abstract
Antibacterial films have gained attention since the outbreak of the COVID-19 pandemic; however, the impact of metals contained in antibacterial films on human safety have not been sufficiently investigated. This study reports on the important features that must be considered when assessing the bioaccessibility of Ag, Cu, and Zn in antibacterial films. Specifically, the effects of the artificial sweat component (i.e., amino acid and pH), surface weathering of antibacterial films, wipe sampling, and sebum were carefully examined. Our findings suggest that amino acids greatly affect bioaccessibility as amino acids act as ligands to facilitate metal ion leaching. In addition, constant exposure to ultraviolet C causes the film surface to oxidize, which significantly increases metal bioaccessibility due to the electrostatic repulsion between metal oxides and organic substrates. The presence of sebum in artificial sweat and physical damage to the film surface had no significant effects. Furthermore, the wipe sampling used to mimic the realistic dermal contact suggests the feasibility of applying this method for the assessment of bioaccessibility of metals in antibacterial films. The method offers significant advantages for evaluating the human safety aspects of skin contact with consumer products in future research.
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Affiliation(s)
- Seon-Woo Kwon
- Department of Environment Safety System Engineering, Semyung University, Jecheon 27136, South Korea
| | - Junyoung Park
- Department of Civil and Environmental Engineering, Seoul National University, Seoul 08826, South Korea; Institute of Construction and Environmental Engineering, Seoul National University, Seoul 08826, South Korea
| | - Dong-Jun Baek
- Department of Smart City Engineering, Hanyang University, Ansan 15588, South Korea
| | - Haeun Kim
- Department of Smart City Engineering, Hanyang University, Ansan 15588, South Korea
| | - Suk Soon Choi
- Department of Environment Safety System Engineering, Semyung University, Jecheon 27136, South Korea; Department of Biological and Environmental Engineering, Semyung University, Jecheon 27136, South Korea
| | - Jung-Hwan Kwon
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, South Korea
| | - Jinsung An
- Department of Smart City Engineering, Hanyang University, Ansan 15588, South Korea; Department of Civil and Environmental Engineering, Hanyang University, Ansan 15588, South Korea.
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Park J, Moon SS, Song S, Cheng H, Im C, Du L, Kim GD. Comparative review of muscle fiber characteristics between porcine skeletal muscles. J Anim Sci Technol 2024; 66:251-265. [PMID: 38628685 PMCID: PMC11016745 DOI: 10.5187/jast.2023.e126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 11/01/2023] [Accepted: 11/07/2023] [Indexed: 04/19/2024]
Abstract
Meat derived from skeletal muscles of animals is a highly nutritious type of food, and different meat types differ in nutritional, sensory, and quality properties. This study was conducted to compare the results of previous studies on the muscle fiber characteristics of major porcine skeletal muscles to the end of providing basic data for understanding differences in physicochemical and nutritional properties between different porcine muscle types (or meat cuts). Specifically, the muscle fiber characteristics between 19 major porcine skeletal muscles were compared. The muscle fibers that constitute porcine skeletal muscle can be classified into several types based on their contractile and metabolic characteristics. In addition, the muscle fiber characteristics, including size, composition, and density, of each muscle type were investigated and a technology based on these muscle fiber characteristics for improving meat quality or preventing quality deterioration was briefly discussed. This comparative review revealed that differences in muscle fiber characteristics are primarily responsible for the differences in quality between pork cuts (muscle types) and also suggested that data on muscle fiber characteristics can be used to develop optimal meat storage and packaging technologies for each meat cut (or muscle type).
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Affiliation(s)
- Junyoung Park
- Graduate School of International
Agricultural Technology, Seoul National University,
Pyeongchang 25354, Korea
- Mgenic Bio, Anseong 17529,
Korea
| | - Sung Sil Moon
- Sunjin Technology & Research
Institute, Icheon 17332, Korea
| | - Sumin Song
- Graduate School of International
Agricultural Technology, Seoul National University,
Pyeongchang 25354, Korea
| | - Huilin Cheng
- Graduate School of International
Agricultural Technology, Seoul National University,
Pyeongchang 25354, Korea
| | - Choeun Im
- Graduate School of International
Agricultural Technology, Seoul National University,
Pyeongchang 25354, Korea
| | - Lixin Du
- Graduate School of International
Agricultural Technology, Seoul National University,
Pyeongchang 25354, Korea
| | - Gap-Don Kim
- Graduate School of International
Agricultural Technology, Seoul National University,
Pyeongchang 25354, Korea
- Institutes of Green Bio Science &
Technology, Seoul National University, Pyeongchang 25354,
Korea
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Shin HH, Park J, Kim YJ, Kim D, Jin EJ, Ryu JH. Hydrophilic/Hydrophobic Janus Nanofibers Containing Compound K for Cartilage Regeneration. Int J Nanomedicine 2024; 19:1683-1697. [PMID: 38445226 PMCID: PMC10913899 DOI: 10.2147/ijn.s435156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 12/20/2023] [Indexed: 03/07/2024] Open
Abstract
Introduction Cartilage regeneration is a challenging issue due to poor regenerative properties of tissues. Electrospun nanofibers hold enormous potentials for treatments of cartilage defects. However, nanofibrous materials used for the treatment of cartilage defects often require physical and/or chemical modifications to promote the adhesion, proliferation, and differentiation of cells. Thus, it is highly desirable to improve their surface properties with functionality. We aim to design hydrophilic, adhesive, and compound K-loaded nanofibers for treatments of cartilage defects. Methods Hydrophilic and adhesive compound K-containing polycaprolactone nanofibers (CK/PCL NFs) were prepared by coatings of gallic acid-conjugated chitosan (CHI-GA). Therapeutic effects of CHI-GA/CK/PCL NFs were assessed by the expression level of genes involved in the cartilage matrix degradation, inflammatory response, and lipid accumulations in the chondrocytes. In addition, Cartilage damage was evaluated by safranin O staining and immunohistochemistry of interleukin-1β (IL-1β) using OA animal models. To explore the pathway associated with therapeutic effects of CHI-GA/CK/PCL NFs, cell adhesion, phalloidin staining, and the expression level of integrins and peroxisome proliferator-activated receptor (PPARs) were evaluated. Results CHI-GA-coated side of the PCL NFs showed hydrophilic and adhesive properties, whereas the unmodified opposite side remained hydrophobic. The expression levels of genes involved in the degradation of the cartilage matrix, inflammation, and lipogenesis were decreased in CHI-GA/CK/PCL NFs owing to the release of CK. In vivo implantation of CHI-GA/CK/PCL NFs into the cartilage reduced cartilage degradation induced by destabilization of the medial meniscus (DMM) surgery. Furthermore, the accumulation of lipid deposition and expression levels of IL-1β was reduced through the upregulation of PPAR. Conclusion CHI-GA/CK/PCL NFs were effective in the treatments of cartilage defects by inhibiting the expression levels of genes involved in cartilage degradation, inflammation, and lipogenesis as well as reducing lipid accumulation and the expression level of IL-1β via increasing PPAR.
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Affiliation(s)
- Hyun Ho Shin
- Department of Chemical Engineering, Wonkwang, University, Iksan, Jeonbuk, 54538, Republic of Korea
| | - Junyoung Park
- Department of Biological Sciences, College of Natural Sciences, Wonkwang University, Iksan, Jeonbuk, 54538, Republic of Korea
| | - Yeo-Jin Kim
- Department of Carbon Convergence Engineering, Smart Convergence Materials Analysis Center, Wonkwang University, Iksan, Jeonbuk, 54538, Republic of Korea
| | - Donghyeon Kim
- Department of Biological Sciences, College of Natural Sciences, Wonkwang University, Iksan, Jeonbuk, 54538, Republic of Korea
| | - Eun-Jung Jin
- Department of Biological Sciences, College of Natural Sciences, Wonkwang University, Iksan, Jeonbuk, 54538, Republic of Korea
- Integrated Omics Institute, Wonkwang University, Iksan, Jeonbuk, 54538, Republic of Korea
| | - Ji Hyun Ryu
- Department of Chemical Engineering, Wonkwang, University, Iksan, Jeonbuk, 54538, Republic of Korea
- Department of Carbon Convergence Engineering, Smart Convergence Materials Analysis Center, Wonkwang University, Iksan, Jeonbuk, 54538, Republic of Korea
- Integrated Omics Institute, Wonkwang University, Iksan, Jeonbuk, 54538, Republic of Korea
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Song S, Cheng H, Park J, Kim GD. Relationship between peptides and the change in quality characteristics of beef strip loin (M. longissimus lumborum) and tenderloin (M. psoas major). Food Chem 2024; 430:137036. [PMID: 37536066 DOI: 10.1016/j.foodchem.2023.137036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 07/23/2023] [Accepted: 07/26/2023] [Indexed: 08/05/2023]
Abstract
Peptides in fresh and aged beef strip loin (M. longissimus lumborum) and tenderloin (M. psoas major) were quantified to investigate the relationship between proteolysis-induced peptides and beef quality characteristics. A total of 409 and 450 peptides were quantified from strip loin and tenderloin, respectively, and found to be significantly correlated to beef quality characteristics. Changes in redness and yellowness were significantly correlated to the peptides derived from G3P, ENOB, and KCRM in both muscles during 14 days of storage. The peptides produced from MYG, ENOB, HBA, PGK1, and TPIS were strongly associated with improved tenderness, while those derived from major myofibrillar proteins, such as MYH1, MYH2, ACTS, and DESM, were associated with changes in tenderloin color. These results improve our understanding of the association between peptides and changes in meat quality during cold storage, indicating that proteolysis-induced peptides can be indicators of the quality characteristics of fresh and aged meat.
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Affiliation(s)
- Sumin Song
- Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang 25354, Republic of Korea
| | - Huilin Cheng
- Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang 25354, Republic of Korea
| | - Junyoung Park
- Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang 25354, Republic of Korea
| | - Gap-Don Kim
- Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang 25354, Republic of Korea; Institutes of Green Bio Science and Technology, Seoul National University, Pyeongchang 25354, Republic of Korea.
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Park J, Yang JH, Jung J, Kwak IS, Choe JK, An J. Comparative analysis of the capability of the extended biotic ligand model and machine learning approaches to predict arsenate toxicity. Chemosphere 2023; 344:140350. [PMID: 37793548 DOI: 10.1016/j.chemosphere.2023.140350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 09/04/2023] [Accepted: 10/01/2023] [Indexed: 10/06/2023]
Abstract
Assessment of inorganic arsenate (As(V)) is critical for ensuring a sustainable environment because of its adverse effects on humans and ecosystems. This study is the first to attempt to predict As(V) toxicity to the bioluminescent bacterium Aliivibrio fischeri exposed to varying As(V) dosages and environmental factors (pH and phosphate concentration) using six machine learning (ML)-guided models. The predicted toxicity values were compared with those predicted using the extended biotic ligand model (BLM) we previously developed to evaluate the toxic effect of oxyanion (i.e., As(V)). The relationship between the variables (input features) and toxicity (output) was found to play an important role in the prediction accuracy of each ML-guided model. The results indicated that the extended BLM had the highest prediction accuracy, with a root mean square error (RMSE) of 12.997. However, with an RMSE of 14.361, the multilayer perceptron (MLP) model exhibited quasi-accurate prediction, despite having been trained with a relatively small dataset (n = 256). In view of simplicity, an MLP model is compatible with an extended BLM and does not require expert knowledge for the derivation of specific parameters, such as binding fraction and binding constant values. Furthermore, with the development and employment of reliable in-situ sensing techniques, monitoring data are expected to be augmented faster to provide sufficient training data for the improvement of prediction accuracy which may, thus, allow it to outperform the extended BLM after obtaining sufficient data.
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Affiliation(s)
- Junyoung Park
- Department of Civil and Environmental Engineering, Seoul National University, Seoul, 08826, South Korea; Institute of Construction and Environmental Engineering, Seoul National University, Seoul, 08826, South Korea
| | - Jae Hwan Yang
- Division of Urban Planning and Transportation, Seoul Institute, Seoul, 06756, South Korea
| | - Jihyeun Jung
- Department of Civil and Environmental Engineering, Seoul National University, Seoul, 08826, South Korea
| | - Ihn-Sil Kwak
- Department of Ocean Integrated Science, Chonnam National University, Yeosu, 59626, South Korea
| | - Jong Kwon Choe
- Department of Civil and Environmental Engineering, Seoul National University, Seoul, 08826, South Korea
| | - Jinsung An
- Department of Civil & Environmental Engineering, Hanyang University, Ansan, 15588, South Korea.
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Kim G, Kim YY, Heo HJ, Park J. Remimazolam sedation with regional anesthesia in difficult airway due to huge thyroid goiter: A case report. Medicine (Baltimore) 2023; 102:e35497. [PMID: 37861519 PMCID: PMC10589527 DOI: 10.1097/md.0000000000035497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 09/14/2023] [Indexed: 10/21/2023] Open
Abstract
RATIONALE Remimazolam, a novel benzodiazepine, is known to have less respiratory depression compared to other anesthetic agents, and it also has a reversal agent that can be used in emergency situations. Remimazolam with these characteristics can be usefully utilized in the anesthetic management of patients with difficult airway. PATIENT CONCERNS A 78-year-old female patient was scheduled proximal humerus fracture surgery. The patient occasionally complained dyspnea and had multiple comorbidities including thyroid goiter, dementia, and delirium. DIAGNOSES The patient had a large thyroid goiter compressing and deviating the trachea. A short neck with increased circumference was confirmed. A difficult airway was anticipated in the preanesthetic evaluation. INTERVENTIONS Sedation with remimazolam followed by regional anesthesia was performed for the surgery. OUTCOMES The surgery was completed without complications. The patient recovered and was discharged on 15th postoperative days. LESSONS The use of remimazolam for sedation may be an appropriate option in the anesthetic management of patients with difficult airway.
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Affiliation(s)
- Gwanbeom Kim
- Department of Anesthesiology and Pain Medicine, Presbyterian Medical Center, Jeonju, Jeollabuk-Do, Korea
| | - Yu Yil Kim
- Department of Anesthesiology and Pain Medicine, Presbyterian Medical Center, Jeonju, Jeollabuk-Do, Korea
| | - Hyun Joo Heo
- Department of Anesthesiology and Pain Medicine, Presbyterian Medical Center, Jeonju, Jeollabuk-Do, Korea
| | - Junyoung Park
- Department of Anesthesiology and Pain Medicine, Presbyterian Medical Center, Jeonju, Jeollabuk-Do, Korea
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Huh SN, Indelicato DJ, Holtzman AL, Dagan R, Park JY, Brooks ED, Alghamdi A, Rutenberg MS. Low Tesla MR Imaging for Spine with Hardware. Int J Radiat Oncol Biol Phys 2023; 117:e674. [PMID: 37785987 DOI: 10.1016/j.ijrobp.2023.06.2124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Acquiring MR images with minimized susceptibility artifacts is essential for spines with medical hardware to delineate clinical target volumes (CTVs) in radiation therapy for chordomas, chondrosarcomas, and other sarcomas. Since it can be more challenging to visualize the primary structures in high-tesla MR images due to metal-induced artifacts, we optimized imaging parameters to acquire high-quality, low-tesla MR images for clinical use. MATERIALS/METHODS OptimalMR imaging parameters were investigated under general guidelines for artifact reduction techniques by testing several 3D spin echo and gradient echo sequences in a 0.23-T MR scanner. A customized spine phantom was developed to acquire MR images for bony materials which included, 4-6 industrial titanium screws, an aluminum plate, and a superflab bolus. While the 3D b-FFE sequence was used to acquire MR images with a high signal-to-noise ratio, the other 3D T1-FFE, THRIVE, and DTSE sequences were applied to reduce susceptible artifacts to the medical hardware. The optimized parameters determined in the phantom test were applied to the 15 clinical cases, including patients with residual spinal tumors and fusion hardware. The low-tesla MR imaging technique was also used to scan sarcomas of the extremities and re-irradiation cases of spinal metastases. RESULTS The optimized low-tesla MR images in the spine were noticeably useful to guide CTV delineations for patients with medical hardware, especially for residual or recurrent tumors. The imaging technique to minimize susceptibility artifacts enabled a more defined separation of each hardware component from the spinal cord and CTVs. In spine metastasis cases, pre-irradiated target volumes were determined, reflecting property changes in the bone marrow. CONCLUSION The MR images acquired using the optimized parameters showed minimal artifacts to scan spine patients with hardware. By using the low-tesla MR images, spinal chordoma and chondrosarcoma patients could be treated to improve tumor control probabilities with minimized complications.
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Affiliation(s)
- S N Huh
- University of Florida Health Proton Therapy Institute, Jacksonville, FL; Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL
| | - D J Indelicato
- University of Florida Health Proton Therapy Institute, Jacksonville, FL; Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL
| | - A L Holtzman
- University of Florida Health Proton Therapy Institute, Jacksonville, FL; Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL
| | - R Dagan
- University of Florida Health Proton Therapy Institute, Jacksonville, FL; Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL
| | - J Y Park
- University of Florida Health Proton Therapy Institute, Jacksonville, FL; Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL
| | - E D Brooks
- University of Florida Health Proton Therapy Institute, Jacksonville, FL; Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL
| | - A Alghamdi
- Queen's University, Kingston, ON, Canada
| | - M S Rutenberg
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL
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Huh SN, Zhang Y, Park JY, Indelicato DJ. Development of a Filtimator for Pediatric Image-Guided Radiation Therapy with Low Imaging Dose. Int J Radiat Oncol Biol Phys 2023; 117:S178. [PMID: 37784441 DOI: 10.1016/j.ijrobp.2023.06.2521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) We propose to use the filtimator (a filter and a collimator) for CBCT-based image-guided radiation therapy (IGRT) optimized for pediatric patients to minimize the imaging dose but not to sacrifice the imaging quality required for bony-based image fusion. MATERIALS/METHODS The filtimator was made of Tin (0.6 - 1 mm) and Cu sheets (0.6 to 1.2mm) for filter and collimation with adjustable collimation with 4 to 6 cm fields at the isocenter. The thickness of the filter in the central and the peripheral regions were determined using vendor-provided image registration software and to ensure that the rigid image registration results from the CBCT were with and without the filtimator. The image quality of the filtered CBCT was compared with the regular CBCTs. Image registration accuracy was investigated by creating a < 2° shift in pitch, roll, and rotation and < 3 cm shifts in the lateral, vertical, and longitudinal directions, using commercial head and house-made phantoms. The imaging dose reduction factor of the filtimator was measured using a CT dose index phantom. RESULTS The contrast-to-noise ratio substantially improved in the opening region of the filter, which provided better visualization of normal anatomy and target volumes. The slim filter reduced the imaging dose by > 98% in the filtered region, and the visualization of bony structures was well preserved, allowing for accurate rigid image registration with the filter. The imaging registration difference was < 0.2° shift in pitch, roll, and rotation and < 0.5 mm shift in the lateral, vertical, and longitudinal directions compared to the regular CBCT. CONCLUSION The proposed dose reduction with the filtimator was demonstrated to be efficient and effective in considerably reducing the patient imaging dose while yielding accurate registration results. This novel technique can become a valuable tool for generating 3- and 4-dimensional images with a much-reduced dose to improve the precision of target localization in radiation therapy.
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Affiliation(s)
- S N Huh
- Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL; University of Florida Health Proton Therapy Institute, Jacksonville, FL
| | - Y Zhang
- Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL; University of Florida Health Proton Therapy Institute, Jacksonville, FL
| | - J Y Park
- Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL; University of Florida Health Proton Therapy Institute, Jacksonville, FL
| | - D J Indelicato
- Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL; University of Florida Health Proton Therapy Institute, Jacksonville, FL
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Jung J, Moon SM, Kim DY, Kim SH, Lee WJ, Heo ST, Park JY, Bae S, Lee MJ, Kim B, Park SY, Jeong HW, Kim Y, Kwak YG, Song KH, Park KH, Park SH, Kim YK, Kim ES, Kim HB. Appropriateness of antibiotic use for patients with asymptomatic bacteriuria or urinary tract infection with positive urine culture: a retrospective observational multi-centre study in Korea. J Hosp Infect 2023; 140:79-86. [PMID: 37562596 DOI: 10.1016/j.jhin.2023.07.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 07/24/2023] [Accepted: 07/29/2023] [Indexed: 08/12/2023]
Abstract
BACKGROUND Antibiotic resistance threatens public health worldwide, and inappropriate use of antibiotics is one of the main causes. AIM To evaluate qualitative use of antibiotics in asymptomatic bacteriuria (ABU) and urinary tract infection (UTI). METHODS Cases of positive urine culture (≥105 colony-forning units/mL) performed in inpatient, outpatient and emergency departments in April 2021 were screened in 26 hospitals in the Republic of Korea. The cases were classified as ABU, lower UTI and upper UTI. The appropriateness of antibiotic use was evaluated retrospectively by infectious disease specialists using quality indicators based on clinical guidelines for ABU and UTI. RESULTS This study included a total of 2697 patients with ABU or UTI. The appropriateness of antibiotic use was assessed in 1157 patients with ABU, and in 677 and 863 patients with lower and upper UTI, respectively. Among the 1157 patients with ABU, 251 (22%) were prescribed antibiotics without appropriate indications. In 66 patients with ABU in which antibiotics were prescribed with appropriate indications, the duration was adequate in only 23 (34.8%) patients. The appropriateness of empirical and definite antibiotics was noted in 527 (77.8%) and 353 (68.0%) patients with lower UTI, and 745 (86.3%) and 583 (78.2%) patients with upper UTI, respectively. The duration of antibiotics was adequate in 321 (61.8%) patients with lower UTI and 576 (78.7%) patients with upper UTI. CONCLUSIONS This nationwide qualitative assessment of antibiotic use in ABU and UTI revealed that antibiotics were often prescribed inappropriately, and the duration of antibiotics was unnecessarily prolonged.
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Affiliation(s)
- J Jung
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea
| | - S M Moon
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - D Y Kim
- Division of Infectious Diseases, Department of Internal Medicine, Kyung Hee University Hospital, Kyung Hee University School of Medicine, Seoul, Republic of Korea
| | - S-H Kim
- Division of Infectious Diseases, Samsung Changwon Hospital, Sungkyunkwan University, Changwon, Republic of Korea
| | - W J Lee
- Department of Internal Medicine, Hallym Hospital, Incheon, Republic of Korea
| | - S T Heo
- Division of Infectious Disease, Department of Internal Medicine, Jeju National University College of Medicine, Jeju, Republic of Korea
| | - J Y Park
- Department of Paediatrics, Chung-Ang University Hospital, Seoul, Republic of Korea
| | - S Bae
- Division of Infectious Diseases, Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - M J Lee
- Department of Internal Medicine, Inje University Sanggye Paik Hospital, Seoul, Republic of Korea
| | - B Kim
- Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Republic of Korea
| | - S Y Park
- Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Republic of Korea; Department of Hospital Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea; Department of Biomedical Systems Informatics, Yonsei University College of Medicine, Seoul, Republic of Korea; Centres for Digital Health, Yongin Severance Hospital, Yonsei University Health System, Yongin, Republic of Korea
| | - H W Jeong
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Republic of Korea; Department of Internal Medicine, Chungbuk National University Hospital, Cheongju, Republic of Korea
| | - Y Kim
- Department of Internal Medicine, Wonkwang University College of Medicine, Iksan, Republic of Korea
| | - Y G Kwak
- Department of Internal Medicine, Inje University Ilsan Paik Hospital, Goyang, Republic of Korea
| | - K-H Song
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - K-H Park
- Department of Infectious Diseases, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - S H Park
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Y K Kim
- Department of Internal Medicine, Wonju College of Medicine, Yonsei University, Wonju, Republic of Korea
| | - E S Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - H B Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea.
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11
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Park J, Kim JY, Park JW, Kang JY, Oh H, Hahm J, Chae YC, Chakravarti D, Seo S. INHAT subunit SET/TAF-Iβ regulates PRC1-independent H2AK119 mono-ubiquitination via E3 ligase MIB1 in colon cancer. NAR Cancer 2023; 5:zcad050. [PMID: 37746636 PMCID: PMC10516711 DOI: 10.1093/narcan/zcad050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 08/21/2023] [Accepted: 09/11/2023] [Indexed: 09/26/2023] Open
Abstract
SET/TAF-Iβ, a subunit of the inhibitor of acetyltransferases (INHAT) complex, exhibits transcriptional repression activity by inhibiting histone acetylation. We find that SET/TAF-Iβ regulates mono-ubiquitination of histone H2A at lysine 119 (H2AK119ub), which is involved in polycomb-mediated transcriptional repression, in HCT116 cells. In this report, we demonstrate that SET/TAF-Iβ acts as an E2 ubiquitin-conjugating enzyme for PRC1-independent H2AK119ub. Furthermore, we identify that MIB1 is the E3 ligase partner for SET/TAF-Iβ using LC-MS/MS and in vitro ubiquitination assays. Transcriptome analysis reveals that SET/TAF-Iβ and MIB1 regulate the expression of genes related to DNA replication and cell cycle progression in HCT116 cells, and knockdown of either protein reduces proliferation of HCT116 cells by impeding cell cycle progression. Together, our study reveals a novel PRC1-independent epigenetic regulatory mechanism for H2AK119ub by SET/TAF-Iβ and MIB1 in colon cancer.
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Affiliation(s)
- Junyoung Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Ji-Young Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Jin Woo Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Joo Young Kang
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Hyein Oh
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Ja Young Hahm
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Yun-Cheol Chae
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Debabrata Chakravarti
- Division of Reproductive Sciences in Medicine, Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Sang Beom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
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12
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Kim HD, Choi H, Abekura F, Park J, Cho SH, Lee YC, Kim CH. Up-regulation of inflammatory reactions by MPT32, a secreted protein of Mycobacterium tuberculosis in RAW264.7 macrophages. J Cell Biochem 2023; 124:1423-1434. [PMID: 37642132 DOI: 10.1002/jcb.30456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 07/21/2023] [Accepted: 07/24/2023] [Indexed: 08/31/2023]
Abstract
Tuberculosis (TB) is caused by Mycobacterium tuberculosis (Mtb) and is still one of the global health burdens. The occurrence of various cases and multidrug resistance confirm that TB has not been completely conquered. For these reasons, the present research has been conducted to explore TB vaccine and drug candidate possibility using Mtb-secreted proteins. Among these proteins, MPT32 is known to have antigenicity and immunogenicity. There has not been a report on the host immune responses and regulation in macrophage cells. The present study was conducted with MPT32 in RAW 264.7 murine macrophage cells that control immune responses by sensing pathogen invasion and environmental change. We have found that MPT32 could activate lipopolysaccharide (LPS)-induced gene expression of metalloproteinase-9 (MMP-9) and inflammation in RAW 264.7 cells. After treating cells with MPT32, the increase in pro-inflammatory cytokines, such as tumor necrosis factor-α (TNF-α), interleukin (IL)-1β (IL-1β) and IL-6, was observed. In addition, activated macrophages expressed inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) to generate various inflammatory mediator molecules, such as nitric oxide (NO). The increase in iNOS and COX-2 levels, which are up-regulators of MMP-9 expression, was also confirmed. The biochemical events are involved in the downstream of activated MAPK signaling and translocation of NF-κ B transcription factor. The present results prove the immunomodulatory effect of MPT32 in the RAW 264.7 murine macrophage cells. it claims the possibility of a TB vaccination and drug candidate using MPT32, contributing to the prevention of TB.
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Affiliation(s)
- Hee-Do Kim
- Department of Biological Science, SungKyunkwan University, Suwon, Republic of Korea
| | - Hyunju Choi
- Department of Biological Science, SungKyunkwan University, Suwon, Republic of Korea
| | - Fukushi Abekura
- Department of Biological Science, SungKyunkwan University, Suwon, Republic of Korea
| | - Junyoung Park
- Department of Biological Science, SungKyunkwan University, Suwon, Republic of Korea
- Division of Zoonotic and Vector Borne Disease Research, Center for Infectious Disease Research, Korea National Institute of Health, Cheongju, Republic of Korea
| | - Seung-Hak Cho
- Division of Zoonotic and Vector Borne Disease Research, Center for Infectious Disease Research, Korea National Institute of Health, Cheongju, Republic of Korea
| | - Young-Choon Lee
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan, South Korea
| | - Cheorl-Ho Kim
- Department of Biological Science, SungKyunkwan University, Suwon, Republic of Korea
- Samsung Advanced Institute for Health Science and Technology (SAIHST), Suwon, Republic of Korea
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13
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Park J, Luo Y, Park JW, Kim SH, Hong YJ, Lim Y, Seo YJ, Bae J, Seo SB. Downregulation of DNA methylation enhances differentiation of THP-1 cells and induces M1 polarization of differentiated macrophages. Sci Rep 2023; 13:13132. [PMID: 37573395 PMCID: PMC10423279 DOI: 10.1038/s41598-023-40362-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 08/09/2023] [Indexed: 08/14/2023] Open
Abstract
DNA methylation is an epigenetic modification that regulates gene expression and plays an essential role in hematopoiesis. UHRF1 and DNMT1 are both crucial for regulating genome-wide maintenance of DNA methylation. Specifically, it is well known that hypermethylation is crucial characteristic of acute myeloid leukemia (AML). However, the mechanism underlying how DNA methylation regulates the differentiation of AML cells, including THP-1 is not fully elucidated. In this study, we report that UHRF1 or DNMT1 depletion enhances the phorbol-12-myristate-13-acetate (PMA)-induced differentiation of THP-1 cells. Transcriptome analysis and genome-wide methylation array results showed that depleting UHRF1 or DNMT1 induced changes that made THP-1 cells highly sensitive to PMA. Furthermore, knockdown of UHRF1 or DNMT1 impeded solid tumor formation in xenograft mouse model. These findings suggest that UHRF1 and DNMT1 play a pivotal role in regulating differentiation and proliferation of THP-1 cells and targeting these proteins may improve the efficiency of differentiation therapy in AML patients.
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Affiliation(s)
- Junyoung Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Yongyang Luo
- College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Jin Woo Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Song Hyun Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Ye Joo Hong
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Younghyun Lim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Young-Jin Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Jeehyeon Bae
- College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Sang Beom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, 06974, Republic of Korea.
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14
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Heo HJ, Kim G, Kim YY, Park J. Can remimazolam be safely used in cardiac tamponade?: A case report. Medicine (Baltimore) 2023; 102:e34822. [PMID: 37565852 PMCID: PMC10419573 DOI: 10.1097/md.0000000000034822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 07/28/2023] [Indexed: 08/12/2023] Open
Abstract
RATIONALE Remimazolam, a benzodiazepine drug, has recently been developed and is currently used for the induction and maintenance of anesthesia. Remimazolam provides hemodynamic stability during anesthesia induction. However, in patients with cardiac tamponade, it is unclear how hemodynamic stability is maintained during the induction and maintenance of general anesthesia with remimazolam. PATIENT CONCERNS An 88-year-old male patient had developed hemopericardium due to penetration of a pigtail catheter into the left ventricle during pericardiocentesis, which was performed to treat massive pericardial effusion. DIAGNOSES The patient was diagnosed with acute cardiac tamponade and a hemothorax. Hemopericardium and hemothorax were confirmed on chest radiography and computed tomography performed immediately after pericardiocentesis. INTERVENTIONS Decompressive pericardiostomy was performed through a left anterolateral thoracotomy with 1-lung ventilation under general anesthesia. Remimazolam was administered for total intravenous anesthesia. OUTCOMES Severe hypotension and bradycardia occurred during the induction of anesthesia with remimazolam (6 mg/kg/hours). LESSONS Remimazolam may induce severe hemodynamic instability during induction of general anesthesia in patient with cardiac tamponade.
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Affiliation(s)
- Hyun Joo Heo
- Department of Anesthesiology and Pain Medicine, Presbyterian Medical Center, Jeonju, Jeollabuk-Do, Korea
| | - Geonbo Kim
- Department of Anesthesiology and Pain Medicine, Presbyterian Medical Center, Jeonju, Jeollabuk-Do, Korea
| | - Yu Yil Kim
- Department of Anesthesiology and Pain Medicine, Presbyterian Medical Center, Jeonju, Jeollabuk-Do, Korea
| | - Junyoung Park
- Department of Anesthesiology and Pain Medicine, Presbyterian Medical Center, Jeonju, Jeollabuk-Do, Korea
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Kim Y, Kim KH, Park J, Yoon HI, Sung W. Prognosis prediction for glioblastoma multiforme patients using machine learning approaches: Development of the clinically applicable model. Radiother Oncol 2023; 183:109617. [PMID: 36921767 DOI: 10.1016/j.radonc.2023.109617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 02/28/2023] [Accepted: 03/04/2023] [Indexed: 03/16/2023]
Abstract
BACKGROUND AND PURPOSE We aimed to develop a clinically applicable prognosis prediction model predicting overall survival (OS) and progression-free survival (PFS) for glioblastoma multiforme (GBM) patients. MATERIALS AND METHODS All 467 patients treated with concurrent chemoradiotherapy at Yonsei Cancer Center from 2016 to 2020 were included in this study. We developed a conventional linear regression, Cox proportional hazards (COX), and non-linear machine learning algorithms, random survival forest (RSF) and survival support vector machine (SVM) based on 16 clinical variables. After backward feature selection and hyperparameter tuning using grid search, we repeated 100 times of cross-validations to combat overfitting and enhance the model performance. Harrell's concordance index (C-index) and integrated brier score (IBS) were employed as quantitative performance metrics. RESULTS In both predictions, RSF performed much better than COX and SVM. (For OS prediction: RSF C-index = 0.72 90%CI [0.71-0.72] and IBS = 0.12 90%CI [0.10-0.13]; For PFS prediction: RSF C-index = 0.70 90%CI [0.70-0.71] and IBS = 0.12 90%CI [0.10-0.14]). Permutation feature importance confirmed that MGMT promoter methylation, extent of resection, age, cone down planning target volume, and subventricular zone involvement are significant prognostic factors for OS. The importance of the extent of resection and MGMT promoter methylation was much higher than other selected input factors in PFS. Our final models accurately stratified two risk groups with root mean square errors less than 0.07. The sensitivity analysis revealed that our final models are highly applicable to newly diagnosed GBM patients. CONCLUSION Our final models can provide a reliable outcome prediction for individual GBM. The final OS and PFS predicting models we developed accurately stratify high-risk groups up to 5-years, and the sensitivity analysis confirmed that both final models are clinically applicable.
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Affiliation(s)
- Yeseul Kim
- Department of Biomedical Engineering and of Biomedicine & Health Science, College of Medicine, The Catholic University of Korea, Seoul 137-70, South Korea
| | - Kyung Hwan Kim
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - Junyoung Park
- Department of Industrial and Systems Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
| | - Hong In Yoon
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, South Korea.
| | - Wonmo Sung
- Department of Biomedical Engineering and of Biomedicine & Health Science, College of Medicine, The Catholic University of Korea, Seoul 137-70, South Korea.
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Kanter J, Gordon SM, Mani S, Sokalska A, Park JY, Senapati S, Huh DD, Mainigi M. Hormonal stimulation reduces numbers and impairs function of human uterine natural killer cells during implantation. Hum Reprod 2023; 38:1047-1059. [PMID: 37075311 PMCID: PMC10501469 DOI: 10.1093/humrep/dead069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 03/05/2023] [Indexed: 04/21/2023] Open
Abstract
STUDY QUESTION How does an altered maternal hormonal environment, such as that seen during superovulation with gonadotropins in ART, impact human uterine immune cell distribution and function during the window of implantation? SUMMARY ANSWER Hormonal stimulation with gonadotropins alters abundance of maternal immune cells including uterine natural killer (uNK) cells and reduces uNK cell ability to promote extravillous trophoblast (EVT) invasion. WHAT IS KNOWN ALREADY An altered maternal hormonal environment, seen following ART, can lead to increased risk for adverse perinatal outcomes associated with disordered placentation. Maternal immune cells play an essential role in invasion of EVTs, a process required for proper establishment of the placenta, and adverse perinatal outcomes have been associated with altered immune cell populations. How ART impacts maternal immune cells and whether this can in turn affect implantation and placentation in humans remain unknown. STUDY DESIGN, SIZE, DURATION A prospective cohort study was carried out between 2018 and 2021 on 51 subjects: 20 from natural cycles 8 days after LH surge; and 31 from stimulated IVF cycles 7 days after egg retrieval. PARTICIPANTS/MATERIALS, SETTING, METHODS Endometrial biopsies and peripheral blood samples were collected during the window of implantation in subjects with regular menstrual cycles or undergoing superovulation. Serum estradiol and progesterone levels were measured by chemiluminescent competitive immunoassay. Immune cell populations in blood and endometrium were analyzed using flow cytometry. uNK cells were purified using fluorescence-activated cell sorting and were subjected to RNA sequencing (RNA-seq). Functional changes in uNK cells due to hormonal stimulation were evaluated using the implantation-on-a-chip (IOC) device, a novel bioengineered platform using human primary cells that mimics early processes that occur during pregnancy in a physiologically relevant manner. Unpaired t-tests, one-way ANOVA, and pairwise multiple comparison tests were used to statistically evaluate differences. MAIN RESULTS AND THE ROLE OF CHANCE Baseline characteristics were comparable for both groups. As expected, serum estradiol levels on the day of biopsy were significantly higher in stimulated (superovulated) patients (P = 0.0005). In the setting of superovulation, we found an endometrium-specific reduction in the density of bulk CD56+ uNK cells (P < 0.05), as well as in the uNK3 subpopulation (P = 0.025) specifically (CD103+ NK cells). In stimulated samples, we also found that the proportion of endometrial B cells was increased (P < 0.0001). Our findings were specific to the endometrium and not seen in peripheral blood. On the IOC device, uNK cells from naturally cycling secretory endometrium promote EVT invasion (P = 0.03). However, uNK cells from hormonally stimulated endometrium were unable to significantly promote EVT invasion, as measured by area of invasion, depth of invasion, and number of invaded EVTs by area. Bulk RNA-seq of sorted uNK cells from stimulated and unstimulated endometrium revealed changes in signaling pathways associated with immune cell trafficking/movement and inflammation. LIMITATIONS, REASONS FOR CAUTION Patient numbers utilized for the study were low but were enough to identify significant overall population differences in select immune cell types. With additional power and deeper immune phenotyping, we may detect additional differences in immune cell composition of blood and endometrium in the setting of hormonal stimulation. Flow cytometry was performed on targeted immune cell populations that have shown involvement in early pregnancy. A more unbiased approach might identify changes in novel maternal immune cells not investigated in this study. We performed RNA-seq only on uNK cells, which demonstrated differences in gene expression. Ovarian stimulation may also impact gene expression and function of other subsets of immune cells, as well as other cell types within the endometrium. Finally, the IOC device, while a major improvement over existing in vitro methods to study early pregnancy, does not include all possible maternal cells present during early pregnancy, which could impact functional effects seen. Immune cells other than uNK cells may impact invasion of EVTs in vitro and in vivo, though these remain to be tested. WIDER IMPLICATIONS OF THE FINDINGS These findings demonstrate that hormonal stimulation affects the distribution of uNK cells during the implantation window and reduces the proinvasive effects of uNK cells during early pregnancy. Our results provide a potential mechanism by which fresh IVF cycles may increase risk of disorders of placentation, previously linked to adverse perinatal outcomes. STUDY FUNDING/COMPETING INTEREST(S) Research reported in this publication was supported by the University of Pennsylvania University Research Funding (to M.M.), the Eunice Kennedy Shriver National Institute of Child Health and Human Development (P50HD068157 to M.M., S.S., and S.M.), National Center for Advancing Translational Sciences of the National Institutes of Health (TL1TR001880 to J.K.), the Institute for Translational Medicine and Therapeutics of the Perelman School of Medicine at the University of Pennsylvania, the Children's Hospital of Philadelphia Research Institute (to S.M.G.), and the National Institute of Allergy and Infectious Diseases (K08AI151265 to S.M.G.). The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. All authors declare no conflict of interest. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- J Kanter
- Division of Reproductive Endocrinology and Infertility, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - S M Gordon
- Division of Neonatology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - S Mani
- Division of Reproductive Endocrinology and Infertility, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - A Sokalska
- Division of Reproductive Endocrinology and Infertility, Stanford University, Stanford, CA, USA
| | - J Y Park
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - S Senapati
- Division of Reproductive Endocrinology and Infertility, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - D D Huh
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
- NSF Science and Technology Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, PA, USA
| | - M Mainigi
- Division of Reproductive Endocrinology and Infertility, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
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Jung J, Park J, Choi Y, Choe JK, An J, Nam K. Environmental forensic approach towards unraveling contamination sources with receptor models: A case study in Nakdong River, South Korea. Sci Total Environ 2023:164554. [PMID: 37270013 DOI: 10.1016/j.scitotenv.2023.164554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 05/15/2023] [Accepted: 05/28/2023] [Indexed: 06/05/2023]
Abstract
The upstream of Nakdong River is contaminated by heavy metals such as Cd, Cu, Zn, As, and Pb. Although the origin of the contamination is unequivocal, it is suspected that the heavy metals have been leached from several mine tailings and a refinery. Here, receptor models, absolute principal component score (APCS) and positive matrix factorization (PMF), were used to identify the contamination sources. Source markers representing each source (factor) were investigated using correlation analysis for five major contaminants (Cd, Zn, As, Pb, and Cu) and identified as following: Cd and Zn for the refinery (factor 1), As for mine tailings (factor 2). The categorization of sources into two factors was statistically validated via the cumulative proportion and APCS-based KMO test score with the values >90 % and > 0.7 (p < 0.001), respectively. High R2 values of linear regressions between the predicted data from receptor models and observed data indicate the reliability of the model prediction; moreover, the predicted initial concentrations of contaminants were validated using a sediment sample collected from near the refinery (chi-test: p > 0.200). Concentration distribution and source contribution using GIS revealed the heavy metal contaminated zones affected by the precipitation.
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Affiliation(s)
- Jihyeun Jung
- Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Junyoung Park
- Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea; Institute of Construction and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Yongju Choi
- Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea; Institute of Construction and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Jong Kwon Choe
- Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea; Institute of Construction and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Jinsung An
- Department of Civil & Environmental Engineering, Hanyang University, Ansan 15588, South Korea
| | - Kyoungphile Nam
- Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea; Institute of Construction and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea.
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Khayam SU, Ajmal A, Park J, Kim IH, Park JW. Tendon Stress Estimation from Strain Data of a Bridge Girder Using Machine Learning-Based Surrogate Model. Sensors (Basel) 2023; 23:s23115040. [PMID: 37299765 DOI: 10.3390/s23115040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 05/10/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023]
Abstract
Prestressed girders reduce cracking and allow for long spans, but their construction requires complex equipment and strict quality control. Their accurate design depends on a precise knowledge of tensioning force and stresses, as well as monitoring the tendon force to prevent excessive creep. Estimating tendon stress is challenging due to limited access to prestressing tendons. This study utilizes a strain-based machine learning method to estimate real-time applied tendon stress. A dataset was generated using finite element method (FEM) analysis, varying the tendon stress in a 45 m girder. Network models were trained and tested on various tendon force scenarios, with prediction errors of less than 10%. The model with the lowest RMSE was chosen for stress prediction, accurately estimating the tendon stress, and providing real-time tensioning force adjustment. The research offers insights into optimizing girder locations and strain numbers. The results demonstrate the feasibility of using machine learning with strain data for instant tendon force estimation.
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Affiliation(s)
- Sadia Umer Khayam
- Department of Civil and Environmental Engineering, Urban Design and Studies, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Ammar Ajmal
- Department of Smart Cities, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Junyoung Park
- Department of Civil and Environmental Engineering, Urban Design and Studies, Chung-Ang University, Seoul 06974, Republic of Korea
| | - In-Ho Kim
- Department of Civil and Engineering, Kunsan National University, Kunsan 54150, Republic of Korea
| | - Jong-Woong Park
- Department of Civil and Environmental Engineering, Urban Design and Studies, Chung-Ang University, Seoul 06974, Republic of Korea
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Lee M, Lee S, Park J. Prediction and validation of the profiles of the top and mixed loading surfaces during discharge from multiple-outlet silos. ADV POWDER TECHNOL 2023. [DOI: 10.1016/j.apt.2023.104005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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Park J, Kang SK, Hwang D, Choi H, Ha S, Seo JM, Eo JS, Lee JS. Automatic Lung Cancer Segmentation in [ 18F]FDG PET/CT Using a Two-Stage Deep Learning Approach. Nucl Med Mol Imaging 2023; 57:86-93. [PMID: 36998591 PMCID: PMC10043063 DOI: 10.1007/s13139-022-00745-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 03/10/2022] [Accepted: 03/12/2022] [Indexed: 10/18/2022] Open
Abstract
Purpose Since accurate lung cancer segmentation is required to determine the functional volume of a tumor in [18F]FDG PET/CT, we propose a two-stage U-Net architecture to enhance the performance of lung cancer segmentation using [18F]FDG PET/CT. Methods The whole-body [18F]FDG PET/CT scan data of 887 patients with lung cancer were retrospectively used for network training and evaluation. The ground-truth tumor volume of interest was drawn using the LifeX software. The dataset was randomly partitioned into training, validation, and test sets. Among the 887 PET/CT and VOI datasets, 730 were used to train the proposed models, 81 were used as the validation set, and the remaining 76 were used to evaluate the model. In Stage 1, the global U-net receives 3D PET/CT volume as input and extracts the preliminary tumor area, generating a 3D binary volume as output. In Stage 2, the regional U-net receives eight consecutive PET/CT slices around the slice selected by the Global U-net in Stage 1 and generates a 2D binary image as the output. Results The proposed two-stage U-Net architecture outperformed the conventional one-stage 3D U-Net in primary lung cancer segmentation. The two-stage U-Net model successfully predicted the detailed margin of the tumors, which was determined by manually drawing spherical VOIs and applying an adaptive threshold. Quantitative analysis using the Dice similarity coefficient confirmed the advantages of the two-stage U-Net. Conclusion The proposed method will be useful for reducing the time and effort required for accurate lung cancer segmentation in [18F]FDG PET/CT.
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Affiliation(s)
- Junyoung Park
- Department of Electrical and Computer Engineering, Seoul National University College of Engineering, Seoul, 08826 Korea
- Department of Nuclear Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
| | - Seung Kwan Kang
- Department of Nuclear Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080 Korea
- Artificial Intelligence Institute, Seoul National University, Seoul, 08826 Korea
- Brightonix Imaging Inc., Seoul, 03080 Korea
| | - Donghwi Hwang
- Department of Nuclear Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080 Korea
- Artificial Intelligence Institute, Seoul National University, Seoul, 08826 Korea
| | - Hongyoon Choi
- Department of Nuclear Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
| | - Seunggyun Ha
- Division of Nuclear Medicine, Department of Radiology, Seoul St Mary’s Hospital, The Catholic University of Korea, Seoul, 06591 Korea
| | - Jong Mo Seo
- Department of Electrical and Computer Engineering, Seoul National University College of Engineering, Seoul, 08826 Korea
| | - Jae Seon Eo
- Department of Nuclear Medicine, Korea University Guro Hospital, 148 Gurodong-ro, Guro-gu, Seoul, 08308 Korea
| | - Jae Sung Lee
- Department of Nuclear Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080 Korea
- Artificial Intelligence Institute, Seoul National University, Seoul, 08826 Korea
- Brightonix Imaging Inc., Seoul, 03080 Korea
- Institute of Radiation Medicine, Medical Research Center, Seoul National University College of Medicine, Seoul, 03080 Korea
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21
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Seo H, Kim T, Yang C, Park J. New design for control cage to enhance coverage and uniformity of shot blasting and its validation using DEM and experiment. Sci Rep 2023; 13:5212. [PMID: 36997600 PMCID: PMC10063654 DOI: 10.1038/s41598-023-32563-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 03/29/2023] [Indexed: 04/01/2023] Open
Abstract
AbstractUnlike shot peening, shot blasting is a process that primarily uses shot balls to remove foreign substances from metal surfaces. Shot blasting is classified into air-blowing and impeller-impact types. The latter is widely used in commercial large-scale shot blasting. This study proposes a new control cage with a concave or convex shape to improve coverage and uniformity in the impeller-impact type shot blaster. The effectiveness of the proposed control cage is verified using discrete element methods and experiments. Moreover, the optimal design in terms of mass flow, coverage, and uniformity is confirmed. Additionally, the distribution of marks on the surface is analyzed through experiments and simulations. Further, the shot ball is projected over a wider area on the surface when the new concave and convex model is employed at the control cage. Consequently, we confirm that the control cage with a concave shape forms approximately a 5-% higher coverage than the conventional model and uniform shot marks while using a low mass flow rate.
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22
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Park SJ, Park J, Kim D, Lee D, Lee CL, Bechwati I, Wu D, Gupta R, Jung J. The first mobile photon-counting detector CT: the human images and technical performance study. Phys Med Biol 2023; 68. [PMID: 36990097 DOI: 10.1088/1361-6560/acc8b3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 03/29/2023] [Indexed: 03/30/2023]
Abstract
Abstract
Objective: The purpose of this study is to assess its human images and its unique capabilities such as the “on demand” higher spatial resolution and multi-spectral imaging of photon-counting-detector (PCD)-CT. 
Approach: In this study, the FDA 510(k) cleared mobile PCD-CT (OmniTom Elite) was used. To this end, we imaged internationally certified CT phantoms and a human cadaver head to evaluate the feasibility of high resolution and multi-energy imaging. We also demonstrate the performance of PCD-CT via first-in-human imaging by scanning three human volunteers. 
Main results: At the 5 mm slice thickness, routinely used in diagnostic head CT, the first human PCD-CT images were diagnostically equivalent to the EID-CT scanner. The high resolution (HR) acquisition mode of PCD-CT achieved a resolution of 11 line-pairs (lp)/cm as compared to 7 lp/cm using the same kernel (posterior fossa-kernel) in the standard acquisition mode of EID-CT. For the quantitative multi-energy CT performance, the measured CT numbers in virtual mono-energetic images (VMI) of iodine inserts in the Gammex Multi-Energy CT phantom (model 1492, Sun Nuclear Corporation, USA) matched the manufacturer reference values with mean percent error of 3.25%. Multi-energy decomposition with PCD-CT demonstrated the separation and quantification of iodine, calcium, and water.
Significance: PCD-CT can achieve multi-resolution acquisition modes without physically changing the CT detector. It can provide superior spatial resolution compared with the standard acquisition mode the conventional mobile EID-CT. Quantitative spectral capability of PCD-CT can provide accurate, simultaneous multi-energy images for material decomposition and VMI generation using a single exposure.
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23
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Nguyen DTH, Seo H, Park J. Effect of electrical stimulation amplitude on dynamic behavior of mice during evacuation. Heliyon 2023; 9:e12930. [PMID: 36747938 PMCID: PMC9898598 DOI: 10.1016/j.heliyon.2023.e12930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 12/22/2022] [Accepted: 01/09/2023] [Indexed: 01/13/2023] Open
Abstract
Profound examination of the dynamic behavior of pedestrians during evacuation can significantly reduce the number of associated accidents. Conducting experiments on animals can help obtain deep insight into the dynamic behavior of pedestrians. Previous experiments using insects, such as ants and woodlice, showed large differences between the dynamic behaviors of insects and humans. However, systematic studies on the behavioral characteristics (e.g., velocity) of mice under electrical stimulation conditions have not been reported. Therefore, this study was conducted to investigate changes in the dynamic behavior of mice during evacuation caused by electric shock. Electrical stimulation was supplied through their feet during evacuation. The average velocity, desired velocity (maximum instantaneous velocity), average velocity in the congestion zone, and escape time were measured and analyzed. According to the results, the desired velocity and escape time increased in proportion to the amplitude of the electrical stimulation; however, the average velocity decreased. Consequently, the level of emergency of mice is affected by both the amplitude of electrical stimulation and the number density in congestion area as in human experiments.
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Affiliation(s)
- Duyen Thi Hai Nguyen
- Department of Mechanical Design Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi, Gyeungbuk 39177, Republic of Korea,Department of Aeronautic, Mechanical and Electrical Convergence Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi, Gyeungbuk 39177, Republic of Korea
| | - Hyeryon Seo
- Department of Mechanical Design Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi, Gyeungbuk 39177, Republic of Korea,Department of Aeronautic, Mechanical and Electrical Convergence Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi, Gyeungbuk 39177, Republic of Korea
| | - Junyoung Park
- Department of Mechanical Design Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi, Gyeungbuk 39177, Republic of Korea,Department of Aeronautic, Mechanical and Electrical Convergence Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi, Gyeungbuk 39177, Republic of Korea,Corresponding author. Department of Mechanical Design Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi, Gyeungbuk 39177, Republic of Korea
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24
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Song S, Park J, Im C, Cheng H, Jung EY, Park TS, Kim GD. Muscle fiber type-specific proteome distribution and protease activity in relation to proteolysis trends in beef striploin (M. longissimus lumborum) and tenderloin (M. psoas major). Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Hwang IJ, Park J, Seo SB. Non-canonical transcriptional regulation of INHAT subunit SET/TAF-Iβ by EZH2. Biochem Biophys Res Commun 2022; 635:136-143. [DOI: 10.1016/j.bbrc.2022.10.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 10/10/2022] [Indexed: 11/26/2022]
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Kim SH, Park J, Park JW, Hahm JY, Yoon S, Hwang IJ, Kim KP, Seo SB. SET7-mediated TIP60 methylation is essential for DNA double-strand break repair. BMB Rep 2022; 55:541-546. [PMID: 35880433 PMCID: PMC9712704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Indexed: 12/14/2022] Open
Abstract
The repair of DNA double-strand breaks (DSBs) by homologous recombination (HR) is crucial for maintaining genomic integrity and is involved in numerous fundamental biological processes. Post-translational modifications by proteins play an important role in regulating DNA repair. Here, we report that the methyltransferase SET7 regulates HR-mediated DSB repair by methylating TIP60, a histone acetyltransferase and tumor suppressor involved in gene expression and protein stability. We show that SET7 targets TIP60 for methylation at K137, which facilitates DSB repair by promoting HR and determines cell viability against DNA damage. Interestingly, TIP60 demethylation is catalyzed by LSD1, which affects HR efficiency. Taken together, our findings reveal the importance of TIP60 methylation status by SET7 and LSD1 in the DSB repair pathway. [BMB Reports 2022; 55(11): 541-546].
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Affiliation(s)
- Song Hyun Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Junyoung Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Jin Woo Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Ja Young Hahm
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Seobin Yoon
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - In Jun Hwang
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Keun Pil Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Sang-Beom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea,Corresponding author. Tel: +82-2-820-5242; Fax: +82-2-822-4039; E-mail:
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27
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Kim SH, Park J, Park JW, Hahm JY, Yoon S, Hwang IJ, Kim KP, Seo SB. SET7-mediated TIP60 methylation is essential for DNA double-strand break repair. BMB Rep 2022; 55:541-546. [PMID: 35880433 PMCID: PMC9712704 DOI: 10.5483/bmbrep.2022.55.11.080] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/23/2022] [Accepted: 07/05/2022] [Indexed: 08/13/2023] Open
Abstract
The repair of DNA double-strand breaks (DSBs) by homologous recombination (HR) is crucial for maintaining genomic integrity and is involved in numerous fundamental biological processes. Post-translational modifications by proteins play an important role in regulating DNA repair. Here, we report that the methyltransferase SET7 regulates HR-mediated DSB repair by methylating TIP60, a histone acetyltransferase and tumor suppressor involved in gene expression and protein stability. We show that SET7 targets TIP60 for methylation at K137, which facilitates DSB repair by promoting HR and determines cell viability against DNA damage. Interestingly, TIP60 demethylation is catalyzed by LSD1, which affects HR efficiency. Taken together, our findings reveal the importance of TIP60 methylation status by SET7 and LSD1 in the DSB repair pathway. [BMB Reports 2022; 55(11): 541-546].
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Affiliation(s)
- Song Hyun Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Junyoung Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Jin Woo Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Ja Young Hahm
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Seobin Yoon
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - In Jun Hwang
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Keun Pil Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
| | - Sang-Beom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea
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28
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Park J, Song S, Cheng H, Im C, Jung EY, Moon SS, Choi J, Hur SJ, Joo ST, Kim GD. Comparison of Meat Quality and Muscle Fiber Characteristics between
Porcine Skeletal Muscles with Different Architectures. Food Sci Anim Resour 2022; 42:874-888. [PMID: 36133631 PMCID: PMC9478981 DOI: 10.5851/kosfa.2022.e40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 07/24/2022] [Accepted: 07/25/2022] [Indexed: 11/06/2022] Open
Affiliation(s)
| | - Sumin Song
- Graduate School of International
Agricultural Technology, Seoul National University,
Pyeongchang 25354, Korea
| | - Huilin Cheng
- Graduate School of International
Agricultural Technology, Seoul National University,
Pyeongchang 25354, Korea
| | - Choeun Im
- Graduate School of International
Agricultural Technology, Seoul National University,
Pyeongchang 25354, Korea
| | - Eun-Young Jung
- Institutes of Green Bio Science &
Technology, Seoul National University, Pyeongchang 25354,
Korea
| | - Sung Sil Moon
- Sunjin Technology & Research
Institute, Icheon 17332, Korea
| | - Jungseok Choi
- Department of Animal Science, Chungbuk
National University, Cheongju 28644, Korea
| | - Sun Jin Hur
- Department of Animal Science and
Technology, Chung-Ang University, Anseong 17546, Korea
| | - Seon-Tea Joo
- Division of Applied Life Science (BK21
Four), Institute of Agriculture & Life Science, Gyeongsang National
University, Jinju 52852, Korea
| | - Gap-Don Kim
- Graduate School of International
Agricultural Technology, Seoul National University,
Pyeongchang 25354, Korea
- Institutes of Green Bio Science &
Technology, Seoul National University, Pyeongchang 25354,
Korea
- Corresponding author: Gap-Don
Kim, Graduate School of International Agricultural Technology, Seoul National
University, Pyeongchang 25354, Korea, Tel: +82-33-339-5778, Fax:
+82-33-339-5779, E-mail:
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29
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Hong YJ, Park J, Hahm JY, Kim SH, Lee DH, Park KS, Seo SB. Regulation of UHRF1 acetylation by TIP60 is important for colon cancer cell proliferation. Genes Genomics 2022; 44:1353-1361. [PMID: 35951156 PMCID: PMC9569301 DOI: 10.1007/s13258-022-01298-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 07/22/2022] [Indexed: 11/28/2022]
Abstract
Background Ubiquitin-like with PHD and RING finger domains 1 (UHRF1) is upregulated in colon cancer cells and associated with silencing tumor suppressor genes (TSGs) to promote colon cancer cell proliferation. Objective To investigate epigenetic modification of UHRF1 by TIP60. Whether UHRF1 acetylation by TIP60 can induce cell proliferation in colon cancer cells. Methods Acetylation sites of UHRF1 by TIP60 was predicted by ASEB (Acetylation Set Enrichment Based) method and identified by immunoprecipitation assay using anti-pan-acetyl lysine antibody and in vitro acetylation assay. Based on this method, UHRF1 acetylation-deficient mimic 4KR (K644R, K646R, K648R, K650R) mutant was generated to investigate effects of UHRF1 acetylation by TIP60. shRNA system was used to generate stable knockdown cell line of UHRF1. With transient transfection of UHRF1 WT and 4KR, the effects of UHRF1 4KR mutant on Jun dimerization protein 2 (JDP2) gene expression, cell proliferation and cell cycle were investigated by RT-qPCR and FACS analysis in shUHRF1 colon cancer cell line. Results Downregulation of TIP60-mediated UHRF1 acetylation is correlated with suppressed cell cycle progression. Acetylation-deficient mimic of UHRF1 showed poor cell growth through increased expression of JDP2 gene. Conclusions Acetylation of UHRF1 4K residues by TIP60 is important for colon cancer cell growth. Furthermore, upregulated JDP2 expression by acetylation-deficient mutant of UHRF1 might be an important epigenetic target for colon cancer cell proliferation.
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Affiliation(s)
- Ye Joo Hong
- Department of Life Science, College of Natural Sciences, Chung-Ang University, 06974, Seoul, South Korea
| | - Junyoung Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, 06974, Seoul, South Korea
| | - Ja Young Hahm
- Department of Life Science, College of Natural Sciences, Chung-Ang University, 06974, Seoul, South Korea
| | - Song Hyun Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, 06974, Seoul, South Korea
| | - Dong Ho Lee
- Da Vinci College of General Education, Chung-Ang University, 06974, Seoul, South Korea
| | - Kwon-Sik Park
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, 22908, Charlottesville, VA, USA
| | - Sang-Beom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, 06974, Seoul, South Korea.
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Park JY, Pardosi JF, Islam MS, Respati T, Chowdhury K, Seale H. What does family involvement in care provision look like across hospital settings in Bangladesh, Indonesia, and South Korea? BMC Health Serv Res 2022; 22:922. [PMID: 35841023 PMCID: PMC9286761 DOI: 10.1186/s12913-022-08278-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 06/30/2022] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Family members provide care whilst staying in the patient's room across a range of cultural settings, irrespective of resource availability in many Asian countries. This has been reported as a contributing factor to the spread of several outbreaks, including COVID-19. Despite these reports, very little is known about the risk of healthcare-associated infection (HAI) transmission related to the involvement of family and private carers in the clinical setting. As a starting point to understanding this issue, this study aimed to provide insights regarding the patient care activities undertaken by family and private carers and the guidance provided to these carers around infection control measures in hospitals located in Bangladesh, Indonesia, and South Korea. METHOD A qualitative study involving 57 semi-structured interviews was undertaken in five tertiary level hospitals across the selected countries. Two groups of individuals were interviewed: (1) patients and their family carers and private carers; and (2) healthcare workers, including doctors, nurses, hospital managers and staff members. Drawing upon the principles of grounded theory, an inductive approach to data analysis using thematic analysis was adopted. RESULTS Five main themes were generated from the analysis of the data: (1) expectation of family carers staying with a patient; (2) residing in the patient's environment: (3) caring activities undertaken by family carers; (4) supporting and educating family carers and (5) communication around healthcare-associated infection and infection prevention and control. CONCLUSION Based on the types of activities being undertaken, coupled with the length of time family and private carers are residing within the clinical setting, coupled with an apparent lack of guidance being given around IPC, more needs to be done to ensure that these carers are not being inadvertently exposed to HAI's or other occupational risks.
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Affiliation(s)
- J Y Park
- School of Population Health, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.
| | - J F Pardosi
- School of Public Health & Social Work, Queensland University of Technology, Brisbane, QLD, Australia
| | - M S Islam
- School of Population Health, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.,International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - T Respati
- Faculty of Medicine, Universitas Islam Bandung, Bandung, Indonesia
| | - K Chowdhury
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - H Seale
- School of Population Health, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
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31
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Nam J, Nguyen DH, Lee S, Heo SM, Park J. Simulation of Non-Carious Cervical Lesions by Computational Toothbrush Model: A Novel Three-Dimensional Discrete Element Method. Sensors (Basel) 2022; 22:s22114183. [PMID: 35684809 PMCID: PMC9185324 DOI: 10.3390/s22114183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 05/28/2022] [Accepted: 05/28/2022] [Indexed: 06/01/2023]
Abstract
Non-carious cervical lesions (NCCLs) are saucer-shaped abrasions of a tooth. NCCLs can form due to various etiologies, including toothbrushing wear, acid erosion, and mechanical stress. Owing to this complex interplay, the mechanism of NCCLs in tooth abrasion has not been established. This study aims to develop a numerical method using a computational toothbrush to simulate NCCLs. The forces acting on the teeth and the amount of abrasion generated were evaluated. The discrete element method using in-house code, connected particle model, and Archard wear model were applied for brushing. In the toothbrush model, 42 acrylic tufts were fixed into a toothbrush head. The teeth models with enamel properties comprised four flat plates and two grooves to simulate the anterior teeth and NCCLs. The brushing speed and depth for one cycle were established as simulation parameters. The force applied within the ununiform plane was concentrated on several bristles as the toothbrush passed through the interproximal space. The brushing force (depth) had a greater effect on tooth abrasion than the brushing speed. Toothbrushing abrasion was mainly concentrated in the interproximal space. Therefore, forceful tooth brushing can cause NCCLs from the interproximal space to the cervical area of the tooth.
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Affiliation(s)
- Jinsu Nam
- Department of Mechanical Design Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi 39177, Gyeungbuk, Korea; (J.N.); (S.L.)
| | - Duong Hong Nguyen
- Techno Vietnam Co., JSC., TSQ Living Area (Euroland), Mo Lao Ward, Ha Dong District, Hanoi City 12110, Vietnam;
| | - Seungjun Lee
- Department of Mechanical Design Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi 39177, Gyeungbuk, Korea; (J.N.); (S.L.)
- Department of Aeronautic, Mechanical and Electrical Convergence Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi 39177, Gyeungbuk, Korea
| | - Seok-Mo Heo
- Department of Periodontology, School of Dentistry, Jeonbuk National University, Jeonju 54907, Jeonbuk, Korea
| | - Junyoung Park
- Department of Mechanical Design Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi 39177, Gyeungbuk, Korea; (J.N.); (S.L.)
- Department of Aeronautic, Mechanical and Electrical Convergence Engineering, Kumoh National Institute of Technology, 61, Daehak-Ro, Gumi 39177, Gyeungbuk, Korea
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Park J, Lee NR, Oh HK, Park SH, Kim JK, Jeong YJ. Factors associated with upgrade, malignant upgrade, and subsequent breast cancer occurrence of papillary breast lesions diagnosed on core needle biopsy. Asia Pac J Clin Oncol 2022; 19:e96-e105. [PMID: 35634788 DOI: 10.1111/ajco.13798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 04/26/2022] [Accepted: 05/08/2022] [Indexed: 11/29/2022]
Abstract
AIM In this study, we analyzed the upgrade rate and associated factors for upgrade, malignant upgrade, and subsequent breast cancer occurrence of papillary breast lesions diagnosed on core needle biopsy (CNB). METHODS One hundred sixty-nine patients who underwent surgery for the treatment of papillary breast lesions diagnosed on CNB were included in this study. Medical records including radiological and pathological reports were retrospectively reviewed. RESULTS The overall upgrade rate was 29.6%, and upgrade rate to malignancy was 16.6%. Age over 45 years, preoperative tumor size ≥0.7 cm on breast ultrasound, pathologic tumor size ≥0.4 cm, breast imaging reporting and data system (BIRADS) category 4b or 4c, and personal history of breast cancer were associated with upgrade. In addition, age over 45 years, preoperative tumor size ≥0.9 cm, pathologic tumor size ≥0.6 cm, atypia in CNB, and BIRADS category 4b or 4c were associated with malignancy. The risk of subsequent breast cancer occurrence was increased in preoperative tumor size ≥0.8 cm, pathologic tumor size ≥0.5 cm, multiple and recurrent lesions. CONCLUSION Our study showed high upgrade rate of papillary breast lesions diagnosed on CNB. Our findings suggest that surgical excision is recommended for papillary breast lesions diagnosed on CNB in selected patients.
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Affiliation(s)
- Junyoung Park
- Department of Surgery, Daegu Catholic University Hospital, Daegu, Republic of Korea
| | - Na-Rang Lee
- Department of Surgery, Daegu Catholic University Hospital, Daegu, Republic of Korea
| | - Hoon Kyu Oh
- Department of Pathology, Daegu Catholic University, School of Medicine, Daegu, Republic of Korea
| | - Sung Hwan Park
- Department of Surgery, Daegu Catholic University Hospital, Daegu, Republic of Korea.,Department of Surgery, Daegu Catholic University, School of Medicine, Daegu, Republic of Korea
| | | | - Young Ju Jeong
- Department of Surgery, Daegu Catholic University Hospital, Daegu, Republic of Korea.,Department of Surgery, Daegu Catholic University, School of Medicine, Daegu, Republic of Korea
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Xue S, Park JY, Tuell JR, Maskal JM, Johnson JS, Dinh T, Kim YHB. In Utero Heat Stress Has Minimal Impacts on Processed Pork Products: A Comparative Study. Foods 2022; 11:foods11091222. [PMID: 35563945 PMCID: PMC9104471 DOI: 10.3390/foods11091222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 04/12/2022] [Accepted: 04/19/2022] [Indexed: 02/04/2023] Open
Abstract
This study aimed to determine what effects in utero heat stress (IUHS) in pigs may have on quality of processed pork products. In two experiments, patties and emulsion sausages were prepared from lean and fat from pigs subjected to IUHS or in utero thermoneutral (IUTN) conditions. Patties formulated to contain 25% added fat had altered textural properties compared to those without additional fat, as shown by lower hardness, cohesiveness, springiness, and chewiness values (p < 0.05), which was not affected by IUHS treatment. Neither fat content nor IUHS treatment affected fluid losses of patties (p > 0.05). In general, 25% added fat patties had greater L*, a*, b*, hue angle, and chroma values than lean patties (p < 0.05). However, 25% added fat patties from the IUHS treatment maintained superior color stability during aerobic display, despite lean patties from this treatment exhibiting increased lipid oxidation (p < 0.05). For emulsion sausages, minimal differences in quality attributes and oxidative stability were found between treatment groups. Subcutaneous fat from IUHS pigs had greater C20:1 and C20:2 than IUTN (p < 0.05), although the magnitude of these differences was slight. Overall, the findings of this study suggest IUHS would have minimal impacts on the functional properties of raw pork, resulting in similar final quality of processed products to IUTN.
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Affiliation(s)
- Siwen Xue
- Meat Science and Muscle Biology Laboratory, Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA; (S.X.); (J.-y.P.); (J.R.T.); (J.M.M.)
- Key Laboratory of Meat Products Processing, Ministry of Agriculture, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Jun-young Park
- Meat Science and Muscle Biology Laboratory, Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA; (S.X.); (J.-y.P.); (J.R.T.); (J.M.M.)
| | - Jacob R. Tuell
- Meat Science and Muscle Biology Laboratory, Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA; (S.X.); (J.-y.P.); (J.R.T.); (J.M.M.)
| | - Jacob M. Maskal
- Meat Science and Muscle Biology Laboratory, Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA; (S.X.); (J.-y.P.); (J.R.T.); (J.M.M.)
| | - Jay S. Johnson
- USDA-ARS Livestock Behavior Research Unit, West Lafayette, IN 47907, USA;
| | - Thu Dinh
- Department of Animal and Dairy Sciences, Mississippi State University, Starkville, MS 39762, USA;
| | - Yuan H. Brad Kim
- Meat Science and Muscle Biology Laboratory, Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA; (S.X.); (J.-y.P.); (J.R.T.); (J.M.M.)
- Correspondence: ; Tel.: +1-765-496-1631
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Nellepalli P, Kim MP, Park J, Noh SM, Ye Z, Jung HW, Ko H, Oh JK. Dynamic and Reprocessable Fluorinated Poly(hindered urea) Network Materials Containing Ionic Liquids to Enhance Triboelectric Performance. ACS Appl Mater Interfaces 2022; 14:17806-17817. [PMID: 35385641 DOI: 10.1021/acsami.2c01963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Triboelectric nanogenerators (TENGs), a newly developed energy harvesting device that converts surrounding environmental mechanical stimuli into electricity, have been significantly explored as an ideal long-term power source for electrical devices. Despite recent advances, the development of advanced TENG devices with sufficient outputs to sustainably power electronic devices and rapid self-healability under mild conditions to improve their lifetime and function is highly demanded. Here, we report a robust self-healable and reprocessable TENG fabricated with a covalent adaptive network based on mechanically strong fluorinated poly(hindered urea) (F-PHU) integrated with ionic liquid as an efficient dielectric material to improve its triboelectric efficiency and self-healing capability simultaneously. The synthesis and integration of a well-defined reactive copolymer having both pendant fluorinated and t-butylamino bulky groups are the key to fabricate robust F-PHU networks containing fluorinated dangling chains that can interact with ionic liquids to induce ionic polarization, which raises the dielectric constant and thus increases triboelectric performance. They also are cross-linked with dynamic bulky urea linkages for rapid self-healability and high reprocessability through their reversible exchange reactions at moderate temperatures. The developed ionic F-PHU materials exhibit a high TENG output performance (power density of 173.0 mW/m2) as well as high TENG output recovery upon repairing their surface damages. This work demonstrates that such a synergistic design of triboelectric ionic F-PHU materials could have great potential for applications requiring high-performance and long-lasting energy harvesting.
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Affiliation(s)
- Pothanagandhi Nellepalli
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Minsoo P Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Junyoung Park
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Seung Man Noh
- Research Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44412, Republic of Korea
| | - Zhibin Ye
- Department of Chemical and Materials Engineering, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Hyun Wook Jung
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hyunhyub Ko
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jung Kwon Oh
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada
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Son W, Chun S, Lee JM, Jeon G, Sim HJ, Kim HW, Cho SB, Lee D, Park J, Jeon J, Suh D, Choi C. Twist-Stabilized, Coiled Carbon Nanotube Yarns with Enhanced Capacitance. ACS Nano 2022; 16:2661-2671. [PMID: 35072453 DOI: 10.1021/acsnano.1c09465] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Coil-structured carbon nanotube (CNT) yarns have recently attracted considerable attention. However, structural instability due to heavy twist insertion, and inherent hydrophobicity restrict its wider application. We report a twist-stable and hydrophilic coiled CNT yarn produced by the facile electrochemical oxidation (ECO) method. The ECO-treated coiled CNT yarn is prepared by applying low potentiostatic voltages (3.0-4.5 V vs Ag/AgCl) between the coiled CNT yarn and a counter electrode immersed in an electrolyte for 10-30 s. Notably, a large volume expansion of the coiled CNT yarns prepared by electrochemical charge injection produces morphological changes, such as surface microbuckling and large reductions in the yarn bias angle and diameter, resulting in the twist-stability of the dried ECO-treated coiled CNT yarns with increased yarn density. The resulting yarns are well functionalized with oxygen-containing groups; they exhibit extrinsic hydrophilicity and significantly improved capacitance (approximately 17-fold). We quantitatively explain the origin of the capacitance improvement using theoretical simulations and experimental observations. Stretchable supercapacitors fabricated with the ECO-treated coiled CNT yarns show high capacitance (12.48 mF/cm and 172.93 mF/cm2, respectively) and great stretchability (80%). Moreover, the ECO-treated coiled CNT yarns are strong enough to be woven into a mask as wearable supercapacitors.
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Affiliation(s)
- Wonkyeong Son
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of Korea
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Sungwoo Chun
- Department of Electronics and Information Engineering, Korea University, Sejong, 30019, Republic of Korea
| | - Jae Myeong Lee
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of Korea
| | - Gichan Jeon
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of Korea
| | - Hyeon Jun Sim
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of Korea
| | - Hyeon Woo Kim
- Convergence Technology Division, Korea Institute of Ceramic Engineering and Technology (KICET), Jinju-si, 52851, Republic of Korea
| | - Sung Beom Cho
- Convergence Technology Division, Korea Institute of Ceramic Engineering and Technology (KICET), Jinju-si, 52851, Republic of Korea
| | - Dongyun Lee
- Department of Nanoenergy Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Junyoung Park
- Department of Energy and Advanced Material Engineering, Dongguk University-Seoul, 30, Pildong-ro 1gil, Jung-gu, Seoul 04620, Republic of Korea
| | - Joonhyeon Jeon
- Division of Electronics & Electronical Engineering, Dongguk University-Seoul, 30, Pildong-ro 1gil, Jung-gu, Seoul, 04620, Republic of Korea
| | - Dongseok Suh
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Changsoon Choi
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of Korea
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Abekura F, Park J, Lim H, Kim H, Choi H, Lee M, Kim C. Mycobacterium tuberculosis
glycolipoprotein LprG inhibits inflammation through NF‐κB signaling of ERK1/2 and JNK in LPS‐induced murine macrophage cells. J Cell Biochem 2022; 123:772-781. [DOI: 10.1002/jcb.30220] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 12/20/2021] [Accepted: 01/10/2022] [Indexed: 12/18/2022]
Affiliation(s)
- Fukushi Abekura
- Department of Biological Sciences SungKyunKwan University Suwon Kyunggi‐Do Republic of Korea
| | - Junyoung Park
- Department of Biological Sciences SungKyunKwan University Suwon Kyunggi‐Do Republic of Korea
| | - Hakseong Lim
- Department of Biological Sciences SungKyunKwan University Suwon Kyunggi‐Do Republic of Korea
| | - Hee‐Do Kim
- Department of Biological Sciences SungKyunKwan University Suwon Kyunggi‐Do Republic of Korea
| | - Hyunju Choi
- Department of Biological Sciences SungKyunKwan University Suwon Kyunggi‐Do Republic of Korea
| | - Moon‐Jo Lee
- Department of Herb Science Dong‐Eui Institute of Technology Busan Republic of Korea
| | - Cheorl‐Ho Kim
- Department of Biological Sciences SungKyunKwan University Suwon Kyunggi‐Do Republic of Korea
- Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Samsung Medical Center Seoul South Korea
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Park J, Yang KA, Choi Y, Choe JK. Novel ssDNA aptamer-based fluorescence sensor for perfluorooctanoic acid detection in water. Environ Int 2022; 158:107000. [PMID: 34991260 DOI: 10.1016/j.envint.2021.107000] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 11/02/2021] [Accepted: 11/22/2021] [Indexed: 06/14/2023]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are widely detected environmental contaminants, and there is a great need for development of sensor technologies for rapid and continuous monitoring of PFAS. In this study, we have developed fluorescence based aptasensor that can possibly monitor perfluorooctanoic acid (PFOA) in water with limit of detection (LOD) of 0.17 μM. This is first to report the successful isolation of PFAS binding ssDNA aptamers. The obtained aptamer selectively binds PFOA with dissociation constant (KD) of 5.5 μM. Specific aptamer binding sites to PFOA were identified and the length of the fluorinated carbons was a key binding factor rather than the functional group. The aptamer binding to structurally similar PFAS compounds (i.e., perfluorocarboxylic acids and perfluorosulfonic acids with 4-8 carbon chains) was also investigated; the aptamer KD values were 6.5 and 3.3 μM for perfluoroheptanoic acid and perfluorohexanesulfonic acid, respectively, while other analogs did not bind to the aptamer. The presence of major inorganic ions and dissolved organic matter had negligible influences on the aptamer performance (<14% at a 10 mM concentration), and the aptamer performance was also robust in real wastewater effluent conditions, with a KD of 7.4 μM for PFOA. Fluorescence-based aptasensor developed in this study is adequate in monitoring PFOA levels in water contaminated with the accident spills and heavy usage of fire-fighting foams near the industrial sites and military bases. More importantly, the study opens up new capability of aptasensors to efficiently monitor the trace amount of various PFAS compounds and other fluorinated alternatives in natural and engineered water environments.
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Affiliation(s)
- Junyoung Park
- Department of Civil and Environmental Engineering and Institute of Construction and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Kyung-Ae Yang
- Division of Experimental Therapeutics, Department of Medicine, Columbia University, New York, NY 10032, United States
| | - Yongju Choi
- Department of Civil and Environmental Engineering and Institute of Construction and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jong Kwon Choe
- Department of Civil and Environmental Engineering and Institute of Construction and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
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Nellepalli P, Patel T, Kim MP, Park J, Ye Z, Jung HW, Ko H, Oh JK. Self-healable triboelectric nanogenerators based on ionic poly(hindered urea) network materials cross-linked with fluorinated block copolymers. Polym Chem 2022. [DOI: 10.1039/d2py00252c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The versatility of a reactive block copolymer approach to fabricate ionic poly(hindered urea)-based covalent adaptive networks having pendant fluorinated species formulated with ionic liquid for effective self-healable triboelectric nanogenerators.
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Affiliation(s)
- Pothanagandhi Nellepalli
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, Canada H4B 1R6
| | - Twinkal Patel
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, Canada H4B 1R6
| | - Minsoo P. Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Junyoung Park
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Zhibin Ye
- Department of Chemical and Materials Engineering, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Hyun Wook Jung
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hyunhyub Ko
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jung Kwon Oh
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, Canada H4B 1R6
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Kim BY, Park JY, Cho KJ, Bae JH. The potential cytotoxic effects of urban particle matter on olfaction. Rhinology 2021; 59:528-537. [PMID: 34636368 DOI: 10.4193/rhin21.192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Urban particulate matter (UPM) in ambient air is implicated in a variety of human health issues worldwide, however, few studies exist on the effect of UPM on the olfactory system. This study aimed to identify the factors affecting the destruction of the olfactory system in a mouse model following UPM exposure. METHODS Mice were divided into: control and four UPM-exposed groups (200 µg UPM at 1 and 2 weeks, and 400 µg UPM at 1 and 2 weeks [standard reference material 1649b; average particle diameter 10.5 μm]). The olfactory neuroepithelium was harvested for histologic examination, gene ontology, quantitative real-time polymerase chain reaction, and western blotting. RESULTS Compared to the control group, olfactory marker protein, Olfr1507, ADCY3, and GNAL mRNA levels were lower, and S-100, CNPase, NGFRAP1, BDNF, and TACR3 mRNA levels were higher in the olfactory neuroepithelium of the UPM groups. Moderately positive correlation was present between the 1- and 2-week groups. After analyzing the 200 and 400 UPM groups separately, the strength of the association between the 200 UPM 1- and 2-week groups was moderately positive. No differences was present in the neuroepithelial inflammatory marker levels between the UPM and control groups. CONCLUSIONS UPM could have cytotoxic effects on the olfactory epithelium. The exposure time and particular concentration of UPM exposure could affect the degree of destruction of the olfactory neuroepithelium. The olfactory regeneration mechanism could be related to the neurotrophic factors, olfactory ensheathing cell stimulation, and trigeminal nerve support.
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Affiliation(s)
- B-Y Kim
- Department of Otorhinolaryngology, School of Medicine, Ewha Womans University of Korea, Seoul, South-Korea
| | - J Y Park
- Department of clinical laboratory, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu City, Gyeonggi-do, South-Korea
| | - K J Cho
- Department of Otorhinolaryngology-Head and Neck Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu City, Gyeonggi-do, South-Korea
| | - J H Bae
- Department of Otorhinolaryngology, School of Medicine, Ewha Womans University of Korea, Seoul, South-Korea
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Choi H, Ko Y, Lee CY, Chung SJ, Kim HI, Kim JH, Park S, Hwang YI, Jang SH, Jung KS, Kim YK, Park JY. Impact of COVID-19 on TB epidemiology in South Korea. Int J Tuberc Lung Dis 2021; 25:854-860. [PMID: 34615583 DOI: 10.5588/ijtld.21.0255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING: Five referral hospitals, South Korea.OBJECTIVE: To assess epidemiological changes in TB before and during the COVID-19 pandemic.DESIGN: This was a multicentre cohort study of 3,969 patients diagnosed with TB.RESULTS: We analysed 3,453 patients diagnosed with TB prior to the COVID-19 pandemic (January 2016-February 2020) and 516 during the pandemic (March-November 2020). During the pandemic, the number of patients visits declined by 15% from the previous 4-year average, and the number of patients diagnosed with TB decreased by 17%. Patients diagnosed during the pandemic were older than those diagnosed before the pandemic (mean age, 60.2 vs. 56.6 years, P < 0.001). The proportion of patients to have primary TB at a younger age (births after 1980) among those diagnosed with TB was significantly lower during the pandemic than before (17.8% in 2020 vs. 23.5% in 2016, 24.0% in 2017, 22.5% in 2018, 23.5% in 2019; P = 0.005).CONCLUSIONS: The COVID-19 pandemic resulted in a reduction in the number of visits to respiratory departments, leading to fewer patients being diagnosed with TB. However, our results suggest that universal personal preventive measures help to suppress TB transmission in regions with intermediate TB burden.
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Affiliation(s)
- H Choi
- Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea, Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea
| | - Y Ko
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
| | - C Y Lee
- Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon, Korea
| | - S J Chung
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Dongtan, Korea
| | - H I Kim
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - J-H Kim
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - S Park
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Y I Hwang
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - S H Jang
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - K-S Jung
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Y K Kim
- Division of Infectious Diseases, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - J Y Park
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
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Park J, Kim N, Jung KI, Yoon S, Noh SM, Bang J, Jung HW. Effect of Silica Nanoparticles Blocked with Epoxy Groups on the Crosslinking and Surface Properties of PEG Hydrogel Films. Polymers (Basel) 2021; 13:polym13193296. [PMID: 34641112 PMCID: PMC8512835 DOI: 10.3390/polym13193296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/23/2021] [Accepted: 09/23/2021] [Indexed: 01/27/2023] Open
Abstract
Silica nanoparticles (G-SiNPs) blocked with 3-glycidoxypropyl trimethoxysilane (GPTS) were newly applied to hydrogel films for improving film coating properties and to distribute the epoxy groups on the film surface. The effects of the content of epoxy-functionalized G-SiNPs on the crosslinking features by photo-induced radical polymerization and the surface mechanical properties of the hydrogel films containing poly(ethylene glycol) dimethacrylate (PEGDMA) and glycidyl methacrylate (GMA) were investigated. The real-time elastic modulus of various PEG hydrogel mixtures with prepared particles was monitored using a rotational rheometer. The distribution of epoxy groups on the crosslinked film surface was directly and indirectly estimated by the elemental analysis of Si and Br. The surface mechanical properties of various hydrogel films were measured by nano-indentation and nano-scratch tests. The relationship between the rheological and surface properties of PEG-based hydrogel films suggests that the use of small amounts of G-SiNPs enhances the surface hardness and crosslinked network of the film and uniformly distributes sufficient epoxy groups on the film surface for further coating applications.
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Affiliation(s)
- Junyoung Park
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Korea; (J.P.); (N.K.); (K.I.J.); (S.Y.)
| | - Nahee Kim
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Korea; (J.P.); (N.K.); (K.I.J.); (S.Y.)
| | - Kevin Injoe Jung
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Korea; (J.P.); (N.K.); (K.I.J.); (S.Y.)
| | - Soomin Yoon
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Korea; (J.P.); (N.K.); (K.I.J.); (S.Y.)
| | - Seung Man Noh
- Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology, Ulsan 44412, Korea;
| | - Joona Bang
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Korea; (J.P.); (N.K.); (K.I.J.); (S.Y.)
- Correspondence: (J.B.); (H.W.J.); Tel.: +82-2-3290-3309 (J.B.); +82-2-3290-3306 (H.W.J.)
| | - Hyun Wook Jung
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Korea; (J.P.); (N.K.); (K.I.J.); (S.Y.)
- Correspondence: (J.B.); (H.W.J.); Tel.: +82-2-3290-3309 (J.B.); +82-2-3290-3306 (H.W.J.)
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Won J, Park JW, Park J, Shin J, Park M. Development of a Reference-Free Indirect Bridge Displacement Sensing System. Sensors (Basel) 2021; 21:s21165647. [PMID: 34451089 PMCID: PMC8402517 DOI: 10.3390/s21165647] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 08/18/2021] [Accepted: 08/18/2021] [Indexed: 11/16/2022]
Abstract
Bridge displacement measurements are important data for assessing the condition of a bridge. Measuring bridge displacement under moving vehicle loads is helpful for rating the load-carrying capacity and evaluating the structural health of a bridge. Displacements are conventionally measured using a linear variable differential transformer (LVDT), which needs stable reference points and thus prohibits the use of this method for measuring displacements for bridges crossing sea channels, large rivers, and highways. This paper proposes a reference-free indirect bridge displacement sensing system using a multichannel sensor board strain and accelerometer with a commercial wireless sensor platform (Xnode). The indirect displacement estimation method is then optimized for measuring the structural displacement. The performance of the developed system was experimentally evaluated on concrete- and steelbox girder bridges. In comparison with the reference LVDT data, the maximum displacement error for the proposed method was 2.17%. The proposed method was successfully applied to the displacement monitoring of a tall bridge (height = 20 m), which was very difficult to monitor using existing systems.
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Affiliation(s)
- Jongbin Won
- Department of Civil and Environmental Engineering, Chung-Ang University, Dongjak, Seoul 06974, Korea; (J.W.); (J.P.); (J.S.)
| | - Jong-Woong Park
- Department of Civil and Environmental Engineering, Chung-Ang University, Dongjak, Seoul 06974, Korea; (J.W.); (J.P.); (J.S.)
- Correspondence: ; Tel.: +82-2-820-5278
| | - Junyoung Park
- Department of Civil and Environmental Engineering, Chung-Ang University, Dongjak, Seoul 06974, Korea; (J.W.); (J.P.); (J.S.)
| | - Junsik Shin
- Department of Civil and Environmental Engineering, Chung-Ang University, Dongjak, Seoul 06974, Korea; (J.W.); (J.P.); (J.S.)
| | - Minyong Park
- Banseok Safety Cooperation, Namyangju-si 12014, Korea;
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Ahn JW, Jang SK, Jo BR, Kim HS, Park JY, Park HY, Yoo YM, Joo SS. A therapeutic intervention for Alzheimer's disease using ginsenoside Rg3: its role in M2 microglial activation and non-amyloidogenesis. J Physiol Pharmacol 2021; 72. [PMID: 34374655 DOI: 10.26402/jpp.2021.2.04] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 04/30/2021] [Indexed: 11/03/2022]
Abstract
Previously, we have reported that ginsenoside Rg3 has typical activities for neuroprotection and Aβ42 clearance by modulating microglia. In this study, we determined the pivotal role of ginsenoside Rg3 in microglia and neuronal cells. In human microglia, Rg3 and its stereoisomers significantly restored inflammatory M1 to normal M0 state and promoted M2 activation by up-regulating acute cytokines such as interleukin-10 and Arginase 1. Moreover, scavenger receptor type A (SRA) was significantly elevated in the presence of ginsenoside Rg3 and 20(S)-Rg3. This indicated that ginsenoside Rg3 could play a crucial role in Aβ uptake and clearance under activated M2 state. We also observed that soluble amyloid precursor protein-alpha (sAPPα) and ADAM10 levels were increased in APP swe-transfected Nuro-2a neuronal cells, whereas sAPPβ was not processed, suggesting that ginsenoside Rg3 was involved in non-amyloidogenic processing. In immunocytochemistry, SRA and a disintegrin and metalloproteinase 10 (desintegrin and metalloproteinase-containing protein 10, ADAM10) were coincidently upregulated in the presence of ginsenoside Rg3 and its stereoisomers compared to those in normal control. Taken together, these results suggested that ginsenoside Rg3 could boost acute activation of microglia, promote Aβ uptake, and elevate the sAPPα processing under activated M2 state. Although in vivo studies need to be performed, it is certain that ginsenoside Rg3 is highly involved in ameliorating the pathogenesis of neurodegeneration and can be a promising candidate for treating Alzheimer's disease as a new therapeutic intervention.
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Affiliation(s)
- J W Ahn
- College of Life Science, Gangneung-Wonju National University, Gangneung, Gangwon, Republic of Korea
| | - S K Jang
- College of Life Science, Gangneung-Wonju National University, Gangneung, Gangwon, Republic of Korea.,Huscion MAJIC R&D Center, Seongnam, Gyeonggi, Republic of Korea
| | - B R Jo
- College of Life Science, Gangneung-Wonju National University, Gangneung, Gangwon, Republic of Korea
| | - H S Kim
- College of Life Science, Gangneung-Wonju National University, Gangneung, Gangwon, Republic of Korea
| | - J Y Park
- Department of Chemical Engineering, Fergana Korea International University, Fergana, Uzbekistan
| | - H Y Park
- College of Pharmacy, Chung-Ang University, Dongjak-gu, Seoul, Republic of Korea
| | - Y-M Yoo
- College of Life Science, Gangneung-Wonju National University, Gangneung, Gangwon, Republic of Korea
| | - S S Joo
- College of Life Science, Gangneung-Wonju National University, Gangneung, Gangwon, Republic of Korea. .,Huscion MAJIC R&D Center, Seongnam, Gyeonggi, Republic of Korea
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Choi S, Park J, Kwak K, Cho M. Substituent Effects on the Vibrational Properties of the CN Stretch Mode of Aromatic Nitriles: IR Probes Useful for Time-resolved IR Spectroscopy. Chem Asian J 2021; 16:2626-2632. [PMID: 34288497 DOI: 10.1002/asia.202100657] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/19/2021] [Indexed: 11/10/2022]
Abstract
Developing ideal IR probes is essential to understand the structure and dynamics of biomolecules with time-resolved IR spectroscopies and imaging techniques. Especially, nitrile (CN) group has recently been proposed to serve as IR probes of the local environment of proteins. Herein, we investigated the effect of a substituent on the vibrational properties of the benzonitrile. The electron-donating and withdrawing character of p-substituent on benzonitrile are expected to modulate the vibrational frequency, molar extinction coefficient, and vibrational lifetime of CN probe. FT-IR revealed the positive correlation between electron-donating character and the molar extinction coefficient of CN stretch mode. Infrared pump-probe (IR-PP) measurements showed that the vibrational lifetime of CN stretch mode exhibits a relatively weak correlation with the electron-donating strength. Among the investigated samples, 4-dimethylamino benzonitrile with the strongest electron-donating strength shows enhanced absorption and extended vibrational lifetime. Utilizing substituent effects will be a practical strategy to improve the performance of the IR probe.
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Affiliation(s)
- Suin Choi
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul, 02841, Republic of Korea.,Department of Chemistry, Korea University, Seoul, 02841, Republic of Korea
| | - Junyoung Park
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul, 02841, Republic of Korea.,Department of Chemistry, Korea University, Seoul, 02841, Republic of Korea
| | - Kyungwon Kwak
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul, 02841, Republic of Korea.,Department of Chemistry, Korea University, Seoul, 02841, Republic of Korea
| | - Minhaeng Cho
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul, 02841, Republic of Korea.,Department of Chemistry, Korea University, Seoul, 02841, Republic of Korea
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Seo JK, Ko J, Park J, Eom JU, Yang HS. Effect of Pig Breed and Processing Stage on the Physicochemical Properties of Dry-Cured Loin. Food Sci Anim Resour 2021; 41:402-415. [PMID: 34017950 PMCID: PMC8112318 DOI: 10.5851/kosfa.2021.e5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/26/2021] [Accepted: 02/10/2021] [Indexed: 11/25/2022] Open
Abstract
This study investigated the effect of pig breeds on the quality characteristics
of dry-cured loins according to the processing stage. Physicochemical properties
of 20 dry-cured processed loins with the different pig breeds [Berkshire vs
Landrace×Yorkshire× Duroc (LYD; n=10)] and different
processing stages (raw, curing, dry-ripened 15 day and 30 day) were analyzed.
The pig breed influenced moisture content and pH with values of 59% and
53%, and 6.17 and 5.94, for Berkshire and LYD, respectively, on day 30.
Dry-cured loins made with Berkshire showed higher hardness and lower
cohesiveness than that of the LYD (p<0.05). Redness and yellowness were
higher for Berkshire than LYD (p<0.05). Lipid oxidation and lightness did
not affect by pig breed during processing stages (p>0.05). However,
sulfhydryl content was significantly higher in Berkshire compared to the LYD
after dry-ripened for 15 days (p<0.05). The concentration of total free
amino acids and fatty acids was higher for Berkshire during all processing
stages (p<0.05). Berkshire may be better quality due to its high moisture
content and pH compared to the LYD.
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Affiliation(s)
- Jin-Kyu Seo
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Korea
| | - Jonghyun Ko
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Korea
| | - Junyoung Park
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Korea
| | - Jeong-Uk Eom
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Korea
| | - Han-Sul Yang
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Korea.,Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Korea
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Hahm JY, Park JW, Kang JY, Park J, Kim CH, Kim JY, Ha NC, Kim JW, Seo SB. Acetylation of UHRF1 Regulates Hemi-methylated DNA Binding and Maintenance of Genome-wide DNA Methylation. Cell Rep 2021; 32:107958. [PMID: 32726623 DOI: 10.1016/j.celrep.2020.107958] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 05/14/2020] [Accepted: 07/02/2020] [Indexed: 11/28/2022] Open
Abstract
UHRF1 is a key regulator in DNA methylation maintenance. It binds histone H3K9me2/3 and hemi-methylated DNA and recruits DNMT1 to DNA replication forks during S phase. However, the regulatory mechanism of hemi-methylated DNA binding activity of UHRF1 remains unknown. In this study, we reveal that acetylation of UHRF1 is regulated by PCAF and HDAC1. We show that UHRF1 acetylation at K490 attenuates its binding affinity to hemi-methylated DNA. We analyze genome-wide DNA methylation and gene-expression patterns using stable cell lines and discover that cells where the endogenous UHRF1 is replaced with an acetyl-mimetic (UHRF1 K490Q) mutant show deficiencies in inherited DNA methylation and show different gene-expression patterns in genes related to cell survival. These results reveal that precise regulation of UHRF1 acetylation is required to maintain DNA methylation during cell division and control cell survival.
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Affiliation(s)
- Ja Young Hahm
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Jin Woo Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Joo-Young Kang
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Junyoung Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Chul-Hong Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Ji-Young Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Nam-Chul Ha
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Jung-Woong Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Sang-Beom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea.
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Abstract
In the past few decades, deep learning algorithms have become more prevalent for signal detection and classification. To design machine learning algorithms, however, an adequate dataset is required. Motivated by the existence of several open-source camera-based hand gesture datasets, this descriptor presents UWB-Gestures, the first public dataset of twelve dynamic hand gestures acquired with ultra-wideband (UWB) impulse radars. The dataset contains a total of 9,600 samples gathered from eight different human volunteers. UWB-Gestures eliminates the need to employ UWB radar hardware to train and test the algorithm. Additionally, the dataset can provide a competitive environment for the research community to compare the accuracy of different hand gesture recognition (HGR) algorithms, enabling the provision of reproducible research results in the field of HGR through UWB radars. Three radars were placed at three different locations to acquire the data, and the respective data were saved independently for flexibility.
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Affiliation(s)
- Shahzad Ahmed
- Department of Electronic Engineering, Hanyang University, Seoul, South Korea
| | - Dingyang Wang
- Department of Electronic Engineering, Hanyang University, Seoul, South Korea
| | - Junyoung Park
- Department of Electronic Engineering, Hanyang University, Seoul, South Korea
| | - Sung Ho Cho
- Department of Electronic Engineering, Hanyang University, Seoul, South Korea.
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Abstract
Quantitative single-photon emission computed tomography/computed tomography (SPECT/CT) using Tc-99m pertechnetate aids in evaluating salivary gland function. However, gland segmentation and quantitation of gland uptake is challenging. We develop a salivary gland SPECT/CT with automated segmentation using a deep convolutional neural network (CNN). The protocol comprises SPECT/CT at 20 min, sialagogue stimulation, and SPECT at 40 min post-injection of Tc-99m pertechnetate (555 MBq). The 40-min SPECT was reconstructed using the 20-min CT after misregistration correction. Manual salivary gland segmentation for %injected dose (%ID) by human experts proved highly reproducible, but took 15 min per scan. An automatic salivary segmentation method was developed using a modified 3D U-Net for end-to-end learning from the human experts (n = 333). The automatic segmentation performed comparably with human experts in voxel-wise comparison (mean Dice similarity coefficient of 0.81 for parotid and 0.79 for submandibular, respectively) and gland %ID correlation (R2 = 0.93 parotid, R2 = 0.95 submandibular) with an operating time less than 1 min. The algorithm generated results that were comparable to the reference data. In conclusion, with the aid of a CNN, we developed a quantitative salivary gland SPECT/CT protocol feasible for clinical applications. The method saves analysis time and manual effort while reducing patients' radiation exposure.
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Affiliation(s)
- Junyoung Park
- Department of Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Korea
- Department of Nuclear Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Korea
| | - Jae Sung Lee
- Department of Biomedical Sciences, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Korea
- Department of Nuclear Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Korea
- Institute of Radiation Medicine, Medical Research Center, Seoul National University, Seoul, Korea
| | - Dongkyu Oh
- Department of Nuclear Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Korea
- Department of Nuclear Medicine, Seoul National University Bundang Hospital, 82, Gumi-ro 173 Beon-gil, Bundang-gu, Seongnam-si, 13620, Gyeonggi-do, Korea
| | - Hyun Gee Ryoo
- Department of Nuclear Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Korea
- Department of Nuclear Medicine, Seoul National University Bundang Hospital, 82, Gumi-ro 173 Beon-gil, Bundang-gu, Seongnam-si, 13620, Gyeonggi-do, Korea
| | - Jeong Hee Han
- Department of Nuclear Medicine, Seoul National University Bundang Hospital, 82, Gumi-ro 173 Beon-gil, Bundang-gu, Seongnam-si, 13620, Gyeonggi-do, Korea
| | - Won Woo Lee
- Department of Nuclear Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Korea.
- Department of Nuclear Medicine, Seoul National University Bundang Hospital, 82, Gumi-ro 173 Beon-gil, Bundang-gu, Seongnam-si, 13620, Gyeonggi-do, Korea.
- Institute of Radiation Medicine, Medical Research Center, Seoul National University, Seoul, Korea.
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Park J, Choi H, Abekura F, Lim HS, Im JH, Yang WS, Hwang CW, Chang YC, Lee YC, Park NG, Kim CH. Avenanthramide C Suppresses Matrix Metalloproteinase-9 Expression and Migration Through the MAPK/NF- κB Signaling Pathway in TNF-α-Activated HASMC Cells. Front Pharmacol 2021; 12:621854. [PMID: 33841150 PMCID: PMC8027239 DOI: 10.3389/fphar.2021.621854] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 02/05/2021] [Indexed: 01/01/2023] Open
Abstract
In oat ingredients, flavonoids and phenolic acids are known to be the most important phenolic compounds. In phenolic compounds, wide-ranging biological responses, including antioxidative, anti-inflammatory, anti-allergic, and anti-cancer properties, were reported. Avenanthramide C (Avn C), a component of the phenolic compound of oats, has been reported to be highly antioxidant and anti-inflammatory, but its role in an anti-atherosclerosis response is unknown. The aim of this research was to assess the effect of Avn C on expression of MMP-9 on TNF-α-activated human arterial smooth-muscle cells (HASMC) and signaling involved in its anti-atherosclerosis activity. HASMC cells are known to produce inflammatory cytokines involving IL-6, IL-1β, and TNF-α during arteriosclerosis activity. Avn C specifically reduced IL-6 secretion in HASMC cells. Furthermore, we investigated whether Avn C could inhibit NF-κB nuclear protein translocation. Avn C suppressed nuclear protein translocation of NF-κB in TNF-α-stimulated HASMCs. The MMP-9 enzyme activity and expression are controlled through the MAPKs signaling path during the Avn C treatment. We confirmed that the levels of wound healing (p-value = 0.013, *p < 0.05) and migration (p-value = 0.007, **p < 0.01) are inhibited by 100 ng/ml TNF-α and 100 μM Avn C co-treated. Accordingly, Avn C inhibited the expression of MMP-9 and cell migration through the MAPK/NF-κB signaling pathway in TNF-α-activated HASMC. Therefore, Avn C can be identified and serve as disease prevention material and remedy for atherosclerosis.
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Affiliation(s)
- Junyoung Park
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Hyunju Choi
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Fukushi Abekura
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Hak-Seong Lim
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Jong-Hwan Im
- Department of Biotechnology, College of Fisheries Sciences, Pukyong National University, Busan, South Korea
| | | | - Cher-Won Hwang
- Department of AGEE, Handong Global University, Pohang, South Korea
| | - Young-Chae Chang
- Research Institute of Biomedical Engineering and Department of Medicine, College of Medicine, Catholic University of Daegu, Daegu, South Korea
| | - Young-Choon Lee
- Faculty of Medicinal Biotechnology, Dong-A University, Busan, South Korea
| | - Nam Gyu Park
- Department of Biotechnology, College of Fisheries Sciences, Pukyong National University, Busan, South Korea
| | - Cheorl-Ho Kim
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon, South Korea
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50
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Khan S, Won J, Shin J, Park J, Park JW, Kim SE, Jang Y, Kim DJ. SSVM: An Ultra-Low-Power Strain Sensing and Visualization Module for Long-Term Structural Health Monitoring. Sensors (Basel) 2021; 21:s21062211. [PMID: 33809847 PMCID: PMC8004234 DOI: 10.3390/s21062211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/15/2021] [Accepted: 03/19/2021] [Indexed: 11/16/2022]
Abstract
Structural health monitoring (SHM) is crucial for quantitative behavioral analysis of structural members such as fatigue, buckling, and crack propagation identification. However, formerly developed approaches cannot be implemented effectively for long-term infrastructure monitoring, owing to power inefficiency and data management challenges. This study presents the development of a high-fidelity and ultra-low-power strain sensing and visualization module (SSVM), along with an effective data management technique. Deployment of 24-bit resolution analog to a digital converter and precise half-bridge circuit for strain sensing are two significant factors for efficient strain measurement and power management circuit incorporating a low-power microcontroller unit (MCU), and electronic-paper display (EPD) enabled long-term operation. A prototype for SSVM was developed that performs strain sensing and encodes the strain response in a QR code for visualization on the EPD. For efficient power management, SSVM only activated when the trigger-signal was generated and stayed in power-saving mode consuming 18 mA and 337.9 μA, respectively. The trigger-signal was designed to be generated either periodically by a timer or intentionally by a push-button. A smartphone application and cloud database were developed for efficient data acquisition and management. A lab-scale experiment was carried out to validate the proposed system with a reference strain sensing system. A cantilever beam was deflected by increasing load at its free end, and the resultant strain response of SSVM was compared with the reference. The proposed system was successfully validated to use for long-term static strain measurement.
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Affiliation(s)
- Suleman Khan
- Department of Civil and Environmental Engineering, Chung-Ang University, Seoul 06974, Korea; (S.K.); (J.W.); (J.S.); (J.P.)
| | - Jongbin Won
- Department of Civil and Environmental Engineering, Chung-Ang University, Seoul 06974, Korea; (S.K.); (J.W.); (J.S.); (J.P.)
| | - Junsik Shin
- Department of Civil and Environmental Engineering, Chung-Ang University, Seoul 06974, Korea; (S.K.); (J.W.); (J.S.); (J.P.)
| | - Junyoung Park
- Department of Civil and Environmental Engineering, Chung-Ang University, Seoul 06974, Korea; (S.K.); (J.W.); (J.S.); (J.P.)
| | - Jong-Woong Park
- Department of Civil and Environmental Engineering, Chung-Ang University, Seoul 06974, Korea; (S.K.); (J.W.); (J.S.); (J.P.)
- Correspondence: ; Tel.: +82-2-820-5278
| | - Seung-Eock Kim
- Department of Civil and Environmental Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, Korea; (S.-E.K.); (D.J.K.)
| | - Yun Jang
- Computer Engineering and Convergence Engineering for Intelligent Drone, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, Korea;
| | - Dong Joo Kim
- Department of Civil and Environmental Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, Korea; (S.-E.K.); (D.J.K.)
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