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Kang M, Park J, Kim SA, Kim TY, Kim JY, Kim DW, Park K, Seo J. Modulus-tunable multifunctional hydrogel ink with nanofillers for 3D-Printed soft electronics. Biosens Bioelectron 2024; 255:116257. [PMID: 38574560 DOI: 10.1016/j.bios.2024.116257] [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: 01/06/2024] [Revised: 03/19/2024] [Accepted: 03/27/2024] [Indexed: 04/06/2024]
Abstract
Seamless integration and conformal contact of soft electronics with tissue surfaces have emerged as major challenges in realizing accurate monitoring of biological signals. However, the mechanical mismatch between the electronics and biological tissues impedes the conformal interfacing between them. Attempts have been made to utilize soft hydrogels as the bioelectronic materials to realize tissue-comfortable bioelectronics. However, hydrogels have several limitations in terms of their electrical and mechanical properties. In this study, we present the development of a 3D-printable modulus-tunable hydrogel with multiple functionalities. The hydrogel has a cross-linked double network, which greatly improves its mechanical properties. Functional fillers such as XLG or functionalized carbon nanotubes (fCNT) can be incorporated into the hydrogel to provide tunable mechanics (Young's modulus of 10-300 kPa) and electrical conductivity (electrical conductivity of ∼20 S/m). The developed hydrogel exhibits stretchability (∼1000% strain), self-healing ability (within 5 min), toughness (400-731 kJ/m3) viscoelasticity, tissue conformability, and biocompatibility. Upon examining the rheological properties in the modulated region, hydrogels can be 3D printed to customize the shape and design of the bioelectronics. These hydrogels can be fabricated into ring-shaped strain sensors for wearable sensor applications.
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Affiliation(s)
- Minkyong Kang
- Department of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Jae Park
- Department of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Soo A Kim
- Department of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Tae Young Kim
- Department of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Ju Yeon Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Dae Woo Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Kijun Park
- Department of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea.
| | - Jungmok Seo
- Department of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea.
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2
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Wang Y, Seo J. Transient myocardial thickening after routine ovariohysterectomy in a 15-month-old Ragdoll cat. J Small Anim Pract 2024. [PMID: 38444263 DOI: 10.1111/jsap.13722] [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] [Received: 09/04/2023] [Revised: 02/08/2024] [Accepted: 02/20/2024] [Indexed: 03/07/2024]
Abstract
A 15-month-old female Ragdoll cat was evaluated for progressive lethargy, tachypnoea and increased respiratory effort for 1 week after routine ovariohysterectomy. Thoracic radiographs and an echocardiogram showed evidence of congestive heart failure and a hypertrophic cardiomyopathy phenotype, respectively. The maximum left ventricular wall thickness in end diastole was 6.2 mm. The serum cardiac troponin I concentration was 20.86 ng/mL. The cat was treated with furosemide and clopidogrel and discharged after 3 days. A repeat echocardiogram 2 weeks later showed complete resolution of the hypertrophic cardiomyopathy phenotype (maximum left ventricular wall thickness: 5.0 mm). A repeat cardiac troponin I concentration was 0.041 ng/mL. All cardiac medications were discontinued. A final recheck 4 weeks later revealed stable normal echocardiogram and further reduction in cardiac troponin I concentration to 0.004 ng/mL. This case report demonstrates that resolution of transient myocardial thickening can take 2 weeks after the echocardiographic diagnosis of left ventricular thickening.
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Affiliation(s)
- Y Wang
- Animal Referral Centre Central, Animal Referral Centre, 8 Hereford Street, Freemans Bay, Auckland, 1011, New Zealand
| | - J Seo
- Animal Referral Centre Central, Animal Referral Centre, 8 Hereford Street, Freemans Bay, Auckland, 1011, New Zealand
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Kim Y, Ko J, Byun J, Seo J, Park B. Passivation effect on Cd 0.95Mn 0.05Te 0.98Se 0.02 radiation detection performance. Appl Radiat Isot 2023; 200:110914. [PMID: 37423060 DOI: 10.1016/j.apradiso.2023.110914] [Citation(s) in RCA: 1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 06/25/2023] [Accepted: 06/25/2023] [Indexed: 07/11/2023]
Abstract
CdTe-based detectors have the problem of Te-rich surface layers caused by Br etching, which is one of fabrication steps. Te-rich layer acts as a trapping center and serves as an additional source of charge carriers, thereby degrading transport property of charge carriers and enriching leakage current on surface of detector. To solve this problem, we introduced sodium hypochlorite (NaOCl) as a passivant, and investigated its effect on Cd0.95Mn0.05Te0.98Se0.02 (CMTS), by analyzing chemical state of surface and its performance. After passivation with NaOCl, the results of X-ray photoelectron spectroscopy (XPS) shows the formation of tellurium oxide and elimination of water on CMTS surface, and CMTS presented enhanced performance with Am-241 radioisotope. Consequently, it is demonstrated that the passivation with NaOCl reduces leakage current, compensates defect, and elevates transport of charge carriers, thereby decreasing charge loss of carriers and improving performance of CMTS detector.
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Affiliation(s)
- Y Kim
- Marine Radioactivity Monitoring Group, Korea Marine Environment Management Corporation, Busan 48931, Republic of Korea; Interdisciplinary Program in Precision Public Health, Korea university, Seoul 02841, Republic of Korea
| | - J Ko
- Department of Chemistry, Konkuk University, Seoul 05029, Republic of Korea
| | - J Byun
- Interdisciplinary Program in Precision Public Health, Korea university, Seoul 02841, Republic of Korea; Department of Health and Safety Convergence Science, Korea university, Seoul 02841, Republic of Korea
| | - J Seo
- Interdisciplinary Program in Precision Public Health, Korea university, Seoul 02841, Republic of Korea; Department of Health and Safety Convergence Science, Korea university, Seoul 02841, Republic of Korea
| | - B Park
- Interdisciplinary Program in Precision Public Health, Korea university, Seoul 02841, Republic of Korea; Department of Health and Safety Convergence Science, Korea university, Seoul 02841, Republic of Korea; Advanced Crystal Material/Device Research Center, Konkuk University, Seoul 143-701, Republic of Korea.
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Park J, Kim TY, Kim Y, An S, Kim KS, Kang M, Kim SA, Kim J, Lee J, Cho S, Seo J. A Mechanically Resilient and Tissue-Conformable Hydrogel with Hemostatic and Antibacterial Capabilities for Wound Care. Adv Sci (Weinh) 2023; 10:e2303651. [PMID: 37705116 PMCID: PMC10602564 DOI: 10.1002/advs.202303651] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/05/2023] [Indexed: 09/15/2023]
Abstract
Hydrogels are used in wound dressings because of their tissue-like softness and biocompatibility. However, the clinical translation of hydrogels remains challenging because of their long-term stability, water swellability, and poor tissue adhesiveness. Here, tannic acid (TA) is introduced into a double network (DN) hydrogel consisting of poly(vinyl alcohol) (PVA) and poly(acrylic acid) (PAA) to realize a tough, self-healable, nonswellable, conformally tissue-adhesive, hemostatic, and antibacterial hydrogel. The TA within the DN hydrogel forms a dynamic network, enabling rapid self-healing (within 5 min) and offering effective energy dissipation for toughness and viscoelasticity. Furthermore, the hydrophobic moieties of TA provide a water-shielding effect, rendering the hydrogel nonswellable. A simple chemical modification to the hydrogel further strengthens its interfacial adhesion with tissues (shear strength of ≈31 kPa). Interestingly, the TA also can serve as an effective hemostatic (blood-clotting index of 58.40 ± 1.5) and antibacterial component, which are required for a successful wound dressing. The antibacterial effects of the hydrogel are tested against Escherichia coli and Staphylococcus aureus. Finally, the hydrogel is prepared in patch form and applied to a mouse model to test in vivo biocompatibility and hemostatic performances.
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Affiliation(s)
- Jae Park
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
- LYNK Solutec Inc.Seoul03722Republic of Korea
| | - Tae Young Kim
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Yeonju Kim
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Soohwan An
- Department of BiotechnologyYonsei University50–1 Yonsei‐ro, Seodaemun‐guSeoul03722Republic of Korea
| | - Kyeong Seok Kim
- Department of ChemistryHanyang UniversitySeoul04763Republic of Korea
| | - Minkyong Kang
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Soo A Kim
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Jayoung Kim
- Department of Medical EngineeringCollege of MedicineYonsei UniversitySeoul03722Republic of Korea
| | - Joonseok Lee
- Department of ChemistryHanyang UniversitySeoul04763Republic of Korea
| | - Seung‐Woo Cho
- Department of BiotechnologyYonsei University50–1 Yonsei‐ro, Seodaemun‐guSeoul03722Republic of Korea
| | - Jungmok Seo
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
- LYNK Solutec Inc.Seoul03722Republic of Korea
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Kim SA, Lee Y, Park K, Park J, An S, Oh J, Kang M, Lee Y, Jo Y, Cho SW, Seo J. 3D printing of mechanically tough and self-healing hydrogels with carbon nanotube fillers. Int J Bioprint 2023; 9:765. [PMID: 37555082 PMCID: PMC10406165 DOI: 10.18063/ijb.765] [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: 05/31/2023] [Accepted: 02/06/2023] [Indexed: 08/10/2023] Open
Abstract
Hydrogels have the potential to play a crucial role in bioelectronics, as they share many properties with human tissues. However, to effectively bridge the gap between electronics and biological systems, hydrogels must possess multiple functionalities, including toughness, stretchability, self-healing ability, three-dimensional (3D) printability, and electrical conductivity. Fabricating such tough and self-healing materials has been reported, but it still remains a challenge to fulfill all of those features, and in particular, 3D printing of hydrogel is in the early stage of the research. In this paper, we present a 3D printable, tough, and self-healing multi-functional hydrogel in one platform made from a blend of poly(vinyl alcohol) (PVA), tannic acid (TA), and poly(acrylic acid) (PAA) hydrogel ink (PVA/TA/PAA hydrogel ink). Based on a reversible hydrogen-bond (H-bond)-based double network, the developed 3D printable hydrogel ink showed excellent printability via shear-thinning behavior, allowing high printing resolution (~100 μm) and successful fabrication of 3D-printed structure by layer-by-layer printing. Moreover, the PVA/TA/PAA hydrogel ink exhibited high toughness (tensile loading of up to ~45.6 kPa), stretchability (elongation of approximately 650%), tissue-like Young's modulus (~15 kPa), and self-healing ability within 5 min. Furthermore, carbon nanotube (CNT) fillers were successfully added to enhance the electrical conductivity of the hydrogel. We confirmed the practicality of the hydrogel inks for bioelectronics by demonstrating biocompatibility, tissue adhesiveness, and strain sensing ability through PVA/TA/PAA/CNT hydrogel ink.
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Affiliation(s)
- Soo A Kim
- School of Electrical and Electronic Engineering, Yonsei
University, Seoul 03722, Republic of Korea
| | - Yeontaek Lee
- School of Electrical and Electronic Engineering, Yonsei
University, Seoul 03722, Republic of Korea
| | - Kijun Park
- School of Electrical and Electronic Engineering, Yonsei
University, Seoul 03722, Republic of Korea
| | - Jae Park
- School of Electrical and Electronic Engineering, Yonsei
University, Seoul 03722, Republic of Korea
- LYNK Solutec Inc., Seoul 03722, Republic of Korea
| | - Soohwan An
- Department of Biotechnology, Yonsei University, Seoul
03722, Republic of Korea
| | - Jinseok Oh
- School of Electrical and Electronic Engineering, Yonsei
University, Seoul 03722, Republic of Korea
| | - Minkyong Kang
- School of Electrical and Electronic Engineering, Yonsei
University, Seoul 03722, Republic of Korea
| | - Yurim Lee
- School of Electrical and Electronic Engineering, Yonsei
University, Seoul 03722, Republic of Korea
| | - Yejin Jo
- School of Electrical and Electronic Engineering, Yonsei
University, Seoul 03722, Republic of Korea
| | - Seung-Woo Cho
- Department of Biotechnology, Yonsei University, Seoul
03722, Republic of Korea
| | - Jungmok Seo
- School of Electrical and Electronic Engineering, Yonsei
University, Seoul 03722, Republic of Korea
- LYNK Solutec Inc., Seoul 03722, Republic of Korea
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Park K, An S, Kim J, Yoon S, Song J, Jung D, Park J, Lee Y, Son D, Seo J. Resealable Antithrombotic Artificial Vascular Graft Integrated with a Self-Healing Blood Flow Sensor. ACS Nano 2023; 17:7296-7310. [PMID: 37026563 DOI: 10.1021/acsnano.2c10657] [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] [Indexed: 05/09/2023]
Abstract
Coronary artery bypass grafting is commonly used to treat cardiovascular diseases by replacing blocked blood vessels with autologous or artificial blood vessels. Nevertheless, the availability of autologous vessels in infants and the elderly and low long-term patency rate of grafts hinder extensive application of autologous vessels in clinical practice. The biological and mechanical properties of the resealable antithrombotic artificial vascular graft (RAAVG) fabricated herein, comprising a bioelectronic conduit based on a tough self-healing polymer (T-SHP) and a lubricious inner coating, match with the functions of autologous blood vessels. The self-healing and elastic properties of the T-SHP confer resistance against mechanical stimuli and promote conformal sealing of suturing regions, thereby preventing leakage (stable fixation under a strain of 50%). The inner layer of the RAAVG presents antibiofouling properties against blood cells and proteins, and antithrombotic properties, owing to its lubricious coating. Moreover, the blood-flow sensor fabricated using the T-SHP and carbon nanotubes is seamlessly integrated into the RAAVG via self-healing and allows highly sensitive monitoring of blood flow at low and high flow rates (10- and 100 mL min-1, respectively). Biocompatibility and feasibility of RAAVG as an artificial graft were demonstrated via ex vivo, and in vivo experiment using a rodent model. The use of RAAVGs to replace blocked blood vessels can improve the long-term patency rate of coronary artery bypass grafts.
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Affiliation(s)
- Kijun Park
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Soojung An
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon 16419, Republic of Korea
| | - Jihyun Kim
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Sungjun Yoon
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon 16419, Republic of Korea
- Department of Superintelligence Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jihyang Song
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon 16419, Republic of Korea
- Department of Superintelligence Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Daekwang Jung
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon 16419, Republic of Korea
| | - Jae Park
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
- Lynk Solutec Inc., Seoul 03722, Republic of Korea
| | - Yeontaek Lee
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Donghee Son
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon 16419, Republic of Korea
- Department of Superintelligence Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jungmok Seo
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
- Lynk Solutec Inc., Seoul 03722, Republic of Korea
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Park J, Kim JY, Heo JH, Kim Y, Kim SA, Park K, Lee Y, Jin Y, Shin SR, Kim DW, Seo J. Intrinsically Nonswellable Multifunctional Hydrogel with Dynamic Nanoconfinement Networks for Robust Tissue-Adaptable Bioelectronics. Adv Sci (Weinh) 2023; 10:e2207237. [PMID: 36799540 PMCID: PMC10131858 DOI: 10.1002/advs.202207237] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/02/2023] [Indexed: 06/18/2023]
Abstract
Developing bioelectronics that retains their long-term functionalities in the human body during daily activities is a current critical issue. To accomplish this, robust tissue adaptability and biointerfacing of bioelectronics should be achieved. Hydrogels have emerged as promising materials for bioelectronics that can softly adapt to and interface with tissues. However, hydrogels lack toughness, requisite electrical properties, and fabrication methodologies. Additionally, the water-swellable property of hydrogels weakens their mechanical properties. In this work, an intrinsically nonswellable multifunctional hydrogel exhibiting tissue-like moduli ranging from 10 to 100 kPa, toughness (400-873 J m-3 ), stretchability (≈1000% strain), and rapid self-healing ability (within 5 min), is developed. The incorporation of carboxyl- and hydroxyl-functionalized carbon nanotubes (fCNTs) ensures high conductivity of the hydrogel (≈40 S m-1 ), which can be maintained and recovered even after stretching or rupture. After a simple chemical modification, the hydrogel shows tissue-adhesive properties (≈50 kPa) against the target tissues. Moreover, the hydrogel can be 3D printed with a high resolution (≈100 µm) through heat treatment owing to its shear-thinning capacity, endowing it with fabrication versatility. The hydrogel is successfully applied to underwater electromyography (EMG) detection and ex vivo bladder expansion monitoring, demonstrating its potential for practical bioelectronics.
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Affiliation(s)
- Jae Park
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
- LYNK Solutec inc.Seoul03722Republic of Korea
| | - Ju Yeon Kim
- Department of Chemical and Biomolecular EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Jeong Hyun Heo
- Department of PhysiologyYonsei University College of MedicineSeoul03722Republic of Korea
| | - Yeonju Kim
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Soo A Kim
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Kijun Park
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Yeontaek Lee
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Yoonhee Jin
- Department of PhysiologyYonsei University College of MedicineSeoul03722Republic of Korea
| | - Su Ryon Shin
- Division of Engineering in MedicineDepartment of MedicineBrigham and Women's HospitalHarvard Medical School65 Lansdowne StreetCambridgeMA02139USA
| | - Dae Woo Kim
- Department of Chemical and Biomolecular EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Jungmok Seo
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
- LYNK Solutec inc.Seoul03722Republic of Korea
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Byun J, Kim Y, Seo J, Kim E, Kim K, Jo A, Lee W, Park B. Development and evaluation of photon-counting Cd 0.875Zn 0.125Te 0.98Se 0.02 detector for measuring bone mineral density. Phys Eng Sci Med 2023; 46:245-253. [PMID: 36592283 DOI: 10.1007/s13246-022-01213-4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 12/21/2022] [Indexed: 01/03/2023]
Abstract
Cadmium zinc telluride (CZT) has been actively researched and developed by researchers in various fields. In medical applications, especially photon-counting, CZT enables improved image quality, multi-material decomposition, and improved dose efficiency. Moreover, band gap engineering and selenium addition on CZT improved electrical, spectroscopic and structural properties, thereby supporting performance of CZT as a photon-counting detector. In this study, it is shown that Cd0.875Zn0.125Te0.98Se0.02 (CZTS) shows sufficient performance without loss of detection efficiency. We carried out a study involving the application of this CZTS on calculating bone mineral density (BMD) values, because this application has a novelty of new material for BMD sensor which follows the CdTe- or CdZnTe- based BMD detector. Anatomical images from different energy bins contained different information of attenuation although the images were taken in the same region at the same time. Moreover, calculated BMD values had a proper tendency depending on the amount of bone in that region. The final BMD value was 1.1972 g/cm2, which is close to the real value of 1.2 g/cm2. The introduction with a bone filter and a smaller pixel size will improve the accuracy and precision of photon-counting CZTS detectors for measuring BMD values. However, in this study the CZTS showed the feasibility that a photon-counting CZTS detector can help the measurement of BMD values and the diagnosis of osteoporosis.
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Affiliation(s)
- J Byun
- Department of Health and Safety Convergence Science, Korea University, Seoul, 02841, Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Korea
| | - Y Kim
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Korea
- Marine Radioactivity Monitoring Group, Korea Marine Environment Management Corporation, Busan, 48931, Korea
| | - J Seo
- Department of Health and Safety Convergence Science, Korea University, Seoul, 02841, Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Korea
| | - E Kim
- Department of Health and Safety Convergence Science, Korea University, Seoul, 02841, Korea
| | - K Kim
- Department of Health and Environmental Science, Korea University, Seoul, 02841, Korea
| | - A Jo
- Health Science Research Center, Korea University, Seoul, 02841, Korea
| | - W Lee
- Department of Health and Environmental Science, Korea University, Seoul, 02841, Korea
- Graduate School, Transdisciplinary Major in Learning Health Systems, Korea University, Seoul, 02841, Korea
| | - B Park
- Department of Health and Safety Convergence Science, Korea University, Seoul, 02841, Korea.
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Korea.
- Liquid Crystals Research Center, Konkuk University, Seoul, 05029, Korea.
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Novo Matos J, Sargent J, Silva J, Payne JR, Seo J, Spalla I, Borgeat K, Loureiro J, Pereira N, Simcock IC, Hutchinson JC, Arthurs OJ, Luis Fuentes V. Thin and hypokinetic myocardial segments in cats with cardiomyopathy. J Vet Cardiol 2023; 46:5-17. [PMID: 36893525 DOI: 10.1016/j.jvc.2023.02.002] [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: 02/22/2022] [Revised: 01/30/2023] [Accepted: 02/08/2023] [Indexed: 02/12/2023]
Abstract
INTRODUCTION/OBJECTIVES Thin and hypokinetic myocardial segments (THyMS) represent adverse ventricular (LV) remodeling in human hypertrophic cardiomyopathy. We describe the echocardiographic features and outcome in cats with THyMS, and in a subpopulation, the echocardiographic phenotype before LV wall thinning was detected (pre-THyMS). ANIMALS Eighty client-owned cats. MATERIALS AND METHODS Retrospective multicenter study. Clinical records were searched for cats with THyMS, defined as LV segment(s) with end-diastolic wall thickness (LVWT) <3 mm and hypokinesis in the presence of ≥one LV segment(s) with LVWT >4 mm and normal wall motion. When available, echocardiograms pre-THyMS were assessed. Survival time was defined as time from first presentation with THyMS to death. RESULTS Mean thickest LV wall segment (MaxLVWT) was 6.1 mm (95% CI 5.8-6.4 mm) and thinnest (MinLVWT) was 1.7 mm (95% CI 1.6-1.9 mm). The LV free wall was affected in 74%, apex in 13% and septum in 5%. Most cats (85%) presented with heart failure and/or arterial thromboembolism. Median circulating troponin I concentration was 1.4 ng/mL ([range 0.07-180 ng/mL]). Prior echocardiography results were available for 13/80 cats, a mean of 2.5 years pre-THyMS. In segments subsequently undergoing thinning, initial MaxLVWT measured 6.7 mm (95% CI 5.8-7.7 mm) vs. 1.9 mm (95% CI 1.5-2.4 mm) at last echocardiogram (P<0.0001). Survival data were available for 56/80 cats, median survival time after diagnosing THyMS was 153 days (95% CI 83-223 days). Cardiac histopathology in one cat revealed that THyMS was associated with severe transmural scarring. CONCLUSIONS Cats with THyMS had advanced cardiomyopathy and a poor prognosis.
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Affiliation(s)
- J Novo Matos
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, CB3 0ES, Cambridge, UK; Clinical Science and Services, Royal Veterinary College, Hawkshead Lane, Hatfield, Hertfordshire, AL9 7TA, London, UK.
| | - J Sargent
- Southern Counties Veterinary Specialists, Unit 6, Forest Corner Farm, Hangersley, BH24 3JW, Ringwood, Hampshire, UK
| | - J Silva
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, CB3 0ES, Cambridge, UK; North Downs Specialist Referrals, The Friesian Buildings 3 & 4, Brewer Street, RH1 4QP, Bletchingley, Surrey, UK
| | - J R Payne
- Langford Vets Small Animal Referral Hospital, University of Bristol, Langford House, BS40 5DU, Langford, UK
| | - J Seo
- Animal Referral Centre, 224 Albany Highway, Schnapper Rock, 0632, Auckland, New Zealand
| | - I Spalla
- Ospedale Veterinario San Francesco, Via Feltrina, 29, 31038, Castagnole, Milan, Italy
| | - K Borgeat
- Langford Vets Small Animal Referral Hospital, University of Bristol, Langford House, BS40 5DU, Langford, UK
| | - J Loureiro
- North Downs Specialist Referrals, The Friesian Buildings 3 & 4, Brewer Street, RH1 4QP, Bletchingley, Surrey, UK
| | - N Pereira
- Freelance Cardiology, Salstrasse 92, 8400, Winterthur, Switzerland
| | - I C Simcock
- Department of Clinical Radiology, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Hospital Biomedical Research Centre, London, UK
| | - J C Hutchinson
- Department of Clinical Radiology, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Hospital Biomedical Research Centre, London, UK
| | - O J Arthurs
- Department of Clinical Radiology, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH, London, UK; NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Hospital Biomedical Research Centre, London, UK
| | - V Luis Fuentes
- Clinical Science and Services, Royal Veterinary College, Hawkshead Lane, Hatfield, Hertfordshire, AL9 7TA, London, UK
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Chen YS, Huang CH, Pai PC, Seo J, Lei KF. A Review on Microfluidics-Based Impedance Biosensors. Biosensors (Basel) 2023; 13:bios13010083. [PMID: 36671918 PMCID: PMC9855525 DOI: 10.3390/bios13010083] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 11/21/2022] [Revised: 12/20/2022] [Accepted: 12/28/2022] [Indexed: 05/30/2023]
Abstract
Electrical impedance biosensors are powerful and continuously being developed for various biological sensing applications. In this line, the sensitivity of impedance biosensors embedded with microfluidic technologies, such as sheath flow focusing, dielectrophoretic focusing, and interdigitated electrode arrays, can still be greatly improved. In particular, reagent consumption reduction and analysis time-shortening features can highly increase the analytical capabilities of such biosensors. Moreover, the reliability and efficiency of analyses are benefited by microfluidics-enabled automation. Through the use of mature microfluidic technology, complicated biological processes can be shrunk and integrated into a single microfluidic system (e.g., lab-on-a-chip or micro-total analysis systems). By incorporating electrical impedance biosensors, hand-held and bench-top microfluidic systems can be easily developed and operated by personnel without professional training. Furthermore, the impedance spectrum provides broad information regarding cell size, membrane capacitance, cytoplasmic conductivity, and cytoplasmic permittivity without the need for fluorescent labeling, magnetic modifications, or other cellular treatments. In this review article, a comprehensive summary of microfluidics-based impedance biosensors is presented. The structure of this article is based on the different substrate material categorizations. Moreover, the development trend of microfluidics-based impedance biosensors is discussed, along with difficulties and challenges that may be encountered in the future.
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Affiliation(s)
- Yu-Shih Chen
- Department of Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
| | - Chun-Hao Huang
- Department of Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
| | - Ping-Ching Pai
- Department of Radiation Oncology, Linkou Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan
| | - Jungmok Seo
- Department of Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Electrical & Electronic Engineering, Yonsei University, Seoul 120-749, Republic of Korea
| | - Kin Fong Lei
- Department of Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Radiation Oncology, Linkou Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan
- Department of Electrical & Electronic Engineering, Yonsei University, Seoul 120-749, Republic of Korea
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11
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Choy S, Paolino A, Kim B, Lim S, Seo J, Tan S, Tan W, Corbett M, Barker J, Lynch M, Smith C, Mahil S. 100 Deep learning image analyses in dermatology, beyond skin lesions: a systematic review. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.110] [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: 11/19/2022]
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12
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Roh M, Seo J, Kim J, Chung K. 459 Weight-bearing activity impairs nuclear membrane and genome integrity via YAP activation in plantar melanoma. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.473] [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: 11/19/2022]
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13
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Lee J, Lee H, Lee H, Konlan K, Seo J. Living Lab: Design a digital health intervention for healthy diet of ethnic minority adolescents. Eur J Public Health 2022. [DOI: 10.1093/eurpub/ckac131.363] [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: 11/13/2022] Open
Abstract
Abstract
Eating habits cultivated during adolescence continue through adulthood, and can widen the health gap in adulthood for vulnerable ethnic minority adolescents (EMA). Living Lab is a methodological approach through which stakeholders co-create innovations as citizen scientists in real-life settings. This study aimed to design a digital health intervention (DHI) for enhancing the heathy diet of EMA using the Living Lab approach. The DHI’s content and strategies were derived through literature reviews and focus group interviews. The Living Lab was structured by using 5 principles: real-life setting, user engagement, multi-stakeholder participation, multi-method, and co-creation. It has four activity phases of discovering problems, exploring solutions, solving problems, and disseminating solutions putting more emphasis on the use of digital device and multiple stakeholders such as peers and teachers in co-ideation. DHI participants were grouped into equal proportions of EMA and Korean-ethnic peers. The DHI operates for 2 hours once a week for 4 weeks, with orientation and wrap-up sessions before and after the DHI. Each activity of the co-working process is designed by applying behavior change techniques such as prompts/cues, framing/reframing, and credible sources in a digital educational environment: creating content using Google Jamboard and Padlet, and working on the metaverse platform ZEP. The responses and feedback from the participants are received through an online reflection diary weekly. Usability and acceptability of digital technology are assessed by an online survey on completion of the DHI. The efficacy of DHI is assessed through the change in dietary behavior and food literacy. This study was designed to enable EMA recognize the harmful effects of an unhealthy diet and co-create solutions through dynamic activities in a digital environment. Further, it may serve to change the cultural sensitivity of native peers that influence the health choices of EMA.
Key messages
• Digital-based intervention would be an effective way for vulnerable ethnic minority adolescents to engage in healthy diet.
• The Living Lab approach was used as an essential strategy to develop a digital health intervention to improve the healthy diet of ethnic minority adolescents.
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Affiliation(s)
- J Lee
- FOUR Project, Yonsei University Brain Korea 21 , Seoul, South Korea
- Mo-Im Kim Nursing Research Institute, Yonsei University , Seoul, South Korea
- College of Nursing, Yonsei University , Seoul, South Korea
| | - H Lee
- Mo-Im Kim Nursing Research Institute, Yonsei University , Seoul, South Korea
- College of Nursing, Yonsei University , Seoul, South Korea
| | - H Lee
- FOUR Project, Yonsei University Brain Korea 21 , Seoul, South Korea
- Mo-Im Kim Nursing Research Institute, Yonsei University , Seoul, South Korea
- College of Nursing, Yonsei University , Seoul, South Korea
| | - K Konlan
- Mo-Im Kim Nursing Research Institute, Yonsei University , Seoul, South Korea
- College of Nursing, Yonsei University , Seoul, South Korea
| | - J Seo
- College of Nursing, Yonsei University , Seoul, South Korea
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14
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Lee H, Lee H, Lee M, Kim Y, Kim S, Lee J, Shim SY, Seo J. Diverse perspectives on social determinants of multicultural adolescents: A focus group study. Eur J Public Health 2022. [DOI: 10.1093/eurpub/ckac131.525] [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: 11/14/2022] Open
Abstract
Abstract
Background
As Korea transforms into a multicultural society, social vulnerability of the multicultural adolescents (MAs) puts them at risk for poor health and health disparities. However, there is shortage of evidence on social determinants of health (SDH), which refers to the circumstances of people from birth to death, which affects their health outcomes, for MAs. Thus, this study aims to explore the SDH of MAs from diverse stakeholders’ perspectives.
Methods
This qualitative study comprised 17 focus group interviews with 99 participants (MAs, peers, parents, teachers, neighbors, and community leaders), conducted from June to September 2020. The directed content analysis was conducted using the Minority Health and Health Disparities Research Framework with a high rigor level based on the four criteria of Lincoln and Guba’s trustworthiness.
Results
The participants addressed SDH of MAs in five domains: biological (vulnerability and mechanism); behavioral (health behavior, family/school/peer functioning, and policies and laws); physical/built environment (school/community environment); sociocultural environment (MAs'/parental sociodemographic, language proficiency, MAs'/parental acculturation, social network, and response to/interpersonal/local/societal structural discrimination); and health care system (insurance coverage, MAs'/parental health literacy, availability of services, and health care policies). However, limited SDH in biological and physical/built environment domains were identified.
Conclusions
SDH in sociocultural environment domain and interpersonal influence level were the most commonly addressed. Interpersonal discrimination of both MAs and parents were found to be the most important SDH. These findings suggest that future programs to enhance MAs’ health may be targeted toward reducing discrimination and involving their parents.
Key messages
• Sociocultural environment was found to be the most salient SDH domain to affect MAs’ health.
• SDH of MAs are linked to discrimination and their parents’ sociocultural aspects such as acculturation.
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Affiliation(s)
- H Lee
- College of Nursing, Yonsei University , Seoul, South Korea
- FOUR Project, Yonsei University Brain Korea 21 , Seoul, South Korea
| | - H Lee
- College of Nursing, Yonsei University , Seoul, South Korea
- Mo-Im Kim Nursing Research Institute, Yonsei University , Seoul, South Korea
| | - M Lee
- College of Nursing, Yonsei University , Seoul, South Korea
- FOUR Project, Yonsei University Brain Korea 21 , Seoul, South Korea
| | - Y Kim
- College of Nursing, Kosin University , Busan, South Korea
| | - S Kim
- School of Nursing, Soonchunhyang University , Cheonan, South Korea
| | - J Lee
- College of Nursing, Yonsei University , Seoul, South Korea
| | - SY Shim
- College of Nursing, Yonsei University , Seoul, South Korea
- FOUR Project, Yonsei University Brain Korea 21 , Seoul, South Korea
| | - J Seo
- College of Nursing, Yonsei University , Seoul, South Korea
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15
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Kim K, Lee SJ, Seo J, Suh YJ, Cho I, Hong GR, Ha JW, Kim YJ, Shim CY. Assessment of aortic valve area on cardiac computed tomography and doppler echocardiography: differences and clinical significance in symptomatic bicuspid aortic stenosis. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.143] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Backgrounds
This study aimed to investigate the differences and clinical significance of effective orifice area (EOA) on Doppler echocardiography and geometric orifice area (GOA) on cardiac computed tomography (CT) in bicuspid aortic stenosis (AS).
Methods
One-hundred sixty-three consecutive patients (age 64±10 years, 56.4% men) with symptomatic bicuspid AS who were referred for surgery and underwent both cardiac CT and echocardiography within 3 months were studied. For the aortic valve area, GOACT was measured by multiplanar CT planimetry, and EOAEcho was calculated by continuity equation with Doppler echocardiography. The associations of GOACT and EOAEcho with the patients' symptom scale, biomarkers, and left ventricular (LV) functional variables were comprehensively analyzed.
Results
There was a significant but modest correlation between EOAEcho and GOACT (r=0.604, p<0.001). Both EOAEcho and GOACT revealed significant correlations with mean pressure gradient and peak transaortic velocity and the coefficients were higher in EOAEcho than GOACT. EOAEcho of 1.05 cm2 and GOACT of 1.25 cm2 correspond to the hemodynamic cut-off values for diagnosing severe AS. EOAEcho was well correlated with patients' symptom scale and log NT-pro BNP, but GOACT was not. In addition, EOAEcho showed higher correlation coefficient with estimated LV filling pressure and LV global longitudinal strain than GOACT.
Conclusions
Both EOAEcho and GOACT can be used to evaluate the severity of bicuspid AS, however, the threshold for GOACT for diagnosing severe AS should be applied higher than that for EOAEcho. EOAEcho tends to be more correlated with the patients' symptom degree, biomarkers, and LV functional variables than GOACT.
Funding Acknowledgement
Type of funding sources: Public Institution(s). Main funding source(s): The Korean Cardiac Research Foundation
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Affiliation(s)
- K Kim
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - S J Lee
- Severance Hospital, Radiology , Seoul , Korea (Democratic People's Republic of)
| | - J Seo
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - Y J Suh
- Severance Hospital, Radiology , Seoul , Korea (Democratic People's Republic of)
| | - I Cho
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - G R Hong
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - J W Ha
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - Y J Kim
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - C Y Shim
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
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16
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Kim K, Seo J, Cho I, Choi EY, Hong GR, Ha JW, Rim SJ, Shim CY. Characteristics and clinical implications of premature summation of early and late diastolic filling in patients without tachycardia. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.120] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Backgrounds
The summation of early (E) and late diastolic filling (A) on mitral inflow Doppler even in the absence of tachycardia is often found during assessments of left ventricular (LV) diastolic function. We evaluated the echocardiographic characteristics and clinical implications of premature E-A summation.
Methods
We identified 1,014 subjects who showed E-A summation and normal LV ejection fraction between January 2019 and June 2021 in two tertiary hospitals. Among these, 105 (10.4%) subjects showed premature E-A summation at heart rates less than 100 beats per minute (bpm). The conventional echocardiographic parameters and LV global longitudinal strain (GLS) were compared with 1:1 age, sex, and heart rate matched controls without E-A summation.
Results
The premature E-A summation group had a heart rate of 96.4±3.7 bpm. Only 4 (3.8%) subjects were classified as having LV diastolic dysfunction according to the current guidelines. That group showed prolonged isovolumic relaxation time (107.2±25.3 vs. 61.6±15.6 msec, p<0.001), increased Tei index (0.76±0.19 vs. 0.48±0.10, p<0.001), lower LVEF (63.8±7.0 vs. 67.3±5.6%, p<0.001) and lower absolute LV GLS (|LV GLS|) (17.0±4.2 vs. 19.7±3.3%, p<0.001) than controls. As the E-A summation occurred at lower heart rate, the |LV GLS| was also lower (p for trend=0.002).
Conclusions
The premature E-A summation at heart rates less than 100 bpm is associated with subclinical LV dysfunction. Time-based indices and LV GLS are helpful for evaluating this easily overlooked population.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- K Kim
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - J Seo
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - I Cho
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - E Y Choi
- Gangnam Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - G R Hong
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - J W Ha
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - S J Rim
- Gangnam Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - C Y Shim
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
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17
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Park KW, Kim J, Seo J, Moon S, Jeong K, An K. Entropic comparison of Landau-Zener and Demkov interactions in the phase space of a quadrupole billiard. Chaos 2022; 32:103101. [PMID: 36319274 DOI: 10.1063/5.0101495] [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] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 09/05/2022] [Indexed: 06/16/2023]
Abstract
We investigate two types of avoided crossings in a chaotic billiard within the framework of information theory. The Shannon entropy in the phase space for the Landau-Zener interaction increases as the center of the avoided crossing is approached, whereas for the Demkov interaction, the Shannon entropy decreases as the center of avoided crossing is passed by with an increase in the deformation parameter. This feature can provide a new indicator for scar formation. In addition, it is found that the Fisher information of the Landau-Zener interaction is significantly larger than that of the Demkov interaction.
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Affiliation(s)
- K-W Park
- Research Institute of Mathematics, Seoul National University, Seoul 08826, South Korea
| | - J Kim
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea
| | - J Seo
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea
| | - S Moon
- Faculty of Liberal Education, Seoul National University, Seoul 08826, South Korea
| | - K Jeong
- Research Institute of Mathematics, Seoul National University, Seoul 08826, South Korea
| | - K An
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea
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18
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Sakahashi Y, Higashisaka K, Izutani R, Seo J, Kitahara G, Kobayashi J, Nakamoto Y, Yamamoto R, Tsujino H, Haga Y, Tsutsumi Y. P06-02 Silver nanoparticles inhibit intercellular fusion in the BeWo syncytialization process. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.320] [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: 10/14/2022]
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19
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Park K, Kim S, Jo Y, Park J, Kim I, Hwang S, Lee Y, Kim SY, Seo J. Lubricant skin on diverse biomaterials with complex shapes via polydopamine-mediated surface functionalization for biomedical applications. Bioact Mater 2022; 25:555-568. [PMID: 37056251 PMCID: PMC10088055 DOI: 10.1016/j.bioactmat.2022.07.019] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 07/08/2022] [Accepted: 07/17/2022] [Indexed: 12/28/2022] Open
Abstract
Implantable biomedical devices require an anti-biofouling, mechanically robust, low friction surface for a prolonged lifespan and improved performance. However, there exist no methods that could provide uniform and effective coatings for medical devices with complex shapes and materials to prevent immune-related side effects and thrombosis when they encounter biological tissues. Here, we report a lubricant skin (L-skin), a coating method based on the application of thin layers of bio-adhesive and lubricant-swellable perfluoropolymer that impart anti-biofouling, frictionless, robust, and heat-mediated self-healing properties. We demonstrate biocompatible, mechanically robust, and sterilization-safe L-skin in applications of bioprinting, microfluidics, catheter, and long and narrow medical tubing. We envision that diverse applications of L-skin improve device longevity, as well as anti-biofouling attributes in biomedical devices with complex shapes and material compositions.
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Affiliation(s)
- Kijun Park
- School of Electronic and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Seunghoi Kim
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technologies, Seoul, 02792, Republic of Korea
| | - Yejin Jo
- School of Electronic and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Jae Park
- School of Electronic and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Inwoo Kim
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technologies, Seoul, 02792, Republic of Korea
| | - Sooyoung Hwang
- School of Electronic and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Yeontaek Lee
- School of Electronic and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - So Yeon Kim
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technologies, Seoul, 02792, Republic of Korea
| | - Jungmok Seo
- School of Electronic and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
- Corresponding author.
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20
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Park B, Kim Y, Seo J, Kim K. Effectiveness of parylene coating on CdZnTe surface after optimal passivation. Nuclear Engineering and Technology 2022. [DOI: 10.1016/j.net.2022.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Byun J, Seo J, Seo J, Park B. Growth and characterization of detector-grade CdMnTeSe. Nuclear Engineering and Technology 2022. [DOI: 10.1016/j.net.2022.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Park B, Kim Y, Seo J, Byun J, Kim K. Passivation effect on large volume CdZnTe crystals. Nuclear Engineering and Technology 2022. [DOI: 10.1016/j.net.2022.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Kim S, Seo J, Nam Y, Lee K, Song S, Song J. M188 Evaluation of the ischemia modified albumin assay on the Atellica IM analyzer. Clin Chim Acta 2022. [DOI: 10.1016/j.cca.2022.04.070] [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: 11/03/2022]
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24
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Park J, Jee J, Choi W, Lee K, Lim T, Jeon H, Seo J, Yoo J. Tissue Engineering, Embryonic, Organ and Other Tissue Specific Stem Cells: ASSESSMENT OF THE MUCOSAL HEALING EFFECT OF COLON ORGANOID TRANSPLANTATION IN RADIATION COLITIS. Cytotherapy 2022. [DOI: 10.1016/s1465-3249(22)00402-9] [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: 11/30/2022]
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25
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Seo J, Pearson DA, Bradley RM, Kim JS. Nanoscale pattern formation on silicon surfaces bombarded with a krypton ion beam: experiments and simulations. J Phys Condens Matter 2022; 34:265001. [PMID: 35385840 DOI: 10.1088/1361-648x/ac64df] [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: 02/01/2022] [Accepted: 04/06/2022] [Indexed: 06/14/2023]
Abstract
The nanoscale patterns produced by bombardment of the (100) surface of silicon with a 2 keV Kr ion beam are investigated both experimentally and theoretically. In our experiments, we find that the patterns observed at high ion fluences depend sensitively on the angle of incidence Θ. For Θ values between 74° and 85°, we observe five decidedly different kinds of morphologies, including triangular nanostructures traversed by parallel-mode ripples, long parallel ridges decorated by short-wavelength ripples, and a remarkable mesh-like morphology. In contrast, only parallel-mode ripples are present for low ion fluences except for Θ = 85°. Our simulations show that triangular nanostructures that closely resemble those in our experiments emerge if a linearly dispersive term and a conserved Kuramoto-Sivashinsky nonlinearity are appended to the usual equation of motion. We find ridges traversed by ripples, on the other hand, in simulations of the Harrison-Pearson-Bradley equation (Harrisonet al2017Phys. Rev.E96032804). For Θ = 85°, the solid surface is apparently stable and simulations of an anisotropic Edwards-Wilkinson equation yield surfaces similar to those seen in our experiments. Explaining the other two kinds of patterns we find in our experiments remains a challenge for future theoretical work.
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Affiliation(s)
- J Seo
- Institute of Advanced Materials and Systems, Sook-Myung Women's University, Seoul, 04310, Republic of Korea
| | - D A Pearson
- Division of Science and Engineering, Pennsylvania State University, Abington, Abington, PA 19001, United States of America
| | - R M Bradley
- Departments of Physics and Mathematics, Colorado State University, Fort Collins, CO 80523, United States of America
| | - J-S Kim
- Institute of Advanced Materials and Systems, Sook-Myung Women's University, Seoul, 04310, Republic of Korea
- Department of Physics, Sook-Myung Women's University, Seoul 04310, Republic of Korea
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26
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Yu ES, Chae K, Kim T, Lee J, Seo J, Kim IS, Chung AJ, Lee SD, Ryu YS. Development of a Photonic Switch via Electro-Capillarity-Induced Water Penetration Across a 10-nm Gap. Small 2022; 18:e2107060. [PMID: 35187805 DOI: 10.1002/smll.202107060] [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: 11/22/2021] [Revised: 01/18/2022] [Indexed: 06/14/2023]
Abstract
With narrow and dense nanoarchitectures increasingly adopted to improve optical functionality, achieving the complete wetting of photonic devices is required when aiming at underwater molecule detection over the water-repellent optical materials. Despite continuous advances in photonic applications, real-time monitoring of nanoscale wetting transitions across nanostructures with 10-nm gaps, the distance at which photonic performance is maximized, remains a chronic hurdle when attempting to quantify the water influx and molecules therein. For this reason, the present study develops a photonic switch that transforms the wetting transition into perceivable color changes using a liquid-permeable Fabry-Perot resonator. Electro-capillary-induced Cassie-to-Wenzel transitions produce an optical memory effect in the photonic switch, as confirmed by surface-energy analysis, simulations, and an experimental demonstration. The results show that controlling the wetting behavior using the proposed photonic switch is a promising strategy for the integration of aqueous media with photonic hotspots in plasmonic nanostructures such as biochemical sensors.
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Affiliation(s)
- Eui-Sang Yu
- Department of Electrical and Computer Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Brain Science Institute, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Kyomin Chae
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Taehyun Kim
- Brain Science Institute, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Jongsu Lee
- Department of Electrical and Computer Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Brain Science Institute, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Jungmok Seo
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - In Soo Kim
- Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Aram J Chung
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Sin-Doo Lee
- Department of Electrical and Computer Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Yong-Sang Ryu
- Brain Science Institute, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02481, Republic of Korea
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Lee Y, Kim H, Kim Y, Noh S, Chun B, Kim J, Park C, Choi M, Park K, Lee J, Seo J. A multifunctional electronic suture for continuous strain monitoring and on-demand drug release. Nanoscale 2021; 13:18112-18124. [PMID: 34604894 DOI: 10.1039/d1nr04508c] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Surgical sutures are widely used for closing wounds in skin. However, the monitoring of wound integrity and promoting tissue regeneration at the same time still remains a challenge. To address this, we developed a drug-releasing electronic suture system (DRESS) to monitor the suture integrity in real-time and enhance tissue regeneration by triggered drug release. DRESS was fabricated by using a single fiber with a core-shell structure consisting of a stretchable conductive fiber core and a thermoresponsive polymer shell containing drugs. The highly conductive fiber core acts as a strain sensor that enables continuous monitoring of suture strain with high sensitivity (a gauge factor of ∼686) and mechanical durability (being able to endure more than 3000 stretching cycles). The thermoresponsive shell layer composed of flexible poly(vinyl alcohol) (PVA) grafted onto poly(N-isopropylacrylamide) (PNIPAm) facilitates on-demand drug release via Joule heating. The results of an in vitro scratch assay showed a 66% decrease in wound area upon heat-activation after 48 hours demonstrating the stimuli-responsive therapeutic efficacy of DRESS by promoting cell migration. Moreover, ex vivo testing on porcine skin demonstrated the applicability of DRESS as a electronic suture. The approach used for DRESS provides insight into multifunctional sutures and offers additional therapeutic and diagnostic options for clinical applications.
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Affiliation(s)
- Yeontaek Lee
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea.
| | - Hwajoong Kim
- Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu-si, 42988, Republic of Korea.
| | - Yeonju Kim
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea.
| | - Seungbeom Noh
- Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu-si, 42988, Republic of Korea.
| | - Beomsoo Chun
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea.
| | - Jinho Kim
- Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu-si, 42988, Republic of Korea.
| | - Charnmin Park
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea.
| | - Minyoung Choi
- Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu-si, 42988, Republic of Korea.
| | - Kijun Park
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea.
| | - Jaehong Lee
- Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu-si, 42988, Republic of Korea.
| | - Jungmok Seo
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea.
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Won C, Kwon C, Park K, Seo J, Lee T. Electronic Drugs: Spatial and Temporal Medical Treatment of Human Diseases. Adv Mater 2021; 33:e2005930. [PMID: 33938022 DOI: 10.1002/adma.202005930] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/11/2020] [Indexed: 06/12/2023]
Abstract
Recent advances in diagnostics and medicines emphasize the spatial and temporal aspects of monitoring and treating diseases. However, conventional therapeutics, including oral administration and injection, have difficulties meeting these aspects due to physiological and technological limitations, such as long-term implantation and a narrow therapeutic window. As an innovative approach to overcome these limitations, electronic devices known as electronic drugs (e-drugs) have been developed to monitor real-time body signals and deliver specific treatments to targeted tissues or organs. For example, ingestible and patch-type e-drugs could detect changes in biomarkers at the target sites, including the gastrointestinal (GI) tract and the skin, and deliver therapeutics to enhance healing in a spatiotemporal manner. However, medical treatments often require invasive surgical procedures and implantation of medical equipment for either short or long-term use. Therefore, approaches that could minimize implantation-associated side effects, such as inflammation and scar tissue formation, while maintaining high functionality of e-drugs, are highly needed. Herein, the importance of the spatial and temporal aspects of medical treatment is thoroughly reviewed along with how e-drugs use cutting-edge technological innovations to deal with unresolved medical challenges. Furthermore, diverse uses of e-drugs in clinical applications and the future perspectives of e-drugs are discussed.
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Affiliation(s)
- Chihyeong Won
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Chaebeen Kwon
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Kijun Park
- Biological Interfaces and Sensor Systems Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Jungmok Seo
- Biological Interfaces and Sensor Systems Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Taeyoon Lee
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology (KIST), 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea
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Seo J, Matos JN, Payne JR, Fuentes VL, Connolly DJ. Anterior mitral valve leaflet length in cats with hypertrophic cardiomyopathy. J Vet Cardiol 2021; 37:62-70. [PMID: 34610570 DOI: 10.1016/j.jvc.2021.09.001] [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: 09/06/2020] [Revised: 08/30/2021] [Accepted: 09/06/2021] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Anterior mitral valve leaflet (AMVL) elongation is a recognised feature of hypertrophic cardiomyopathy (HCM). However, whether AMVL elongation precedes left ventricular hypertrophy in cats is currently unknown. The aim of this study was to explore the risk of developing an HCM phenotype in cats with an elongated AMVL. ANIMALS FIFTY-FIVE APPARENTLY HEALTHY CATS WITH A NORMAL BASELINE ECHOCARDIOGRAM AND A FOLLOW-UP ECHOCARDIOGRAM AT >ONE YEAR. MATERIALS AND METHODS This was a retrospective longitudinal study. Cats at the baseline were grouped based on whether or not they developed an HCM phenotype at follow-up. AMVL length and left atrial and left ventricular dimensions were measured from two-dimensional images. RESULTS The median follow-up period of the study population was 5.4 years (25th and 75th quartile, 2.7-6.7 years). During this time, 17 cats (30.9%) developed an HCM phenotype. At the baseline, cats that subsequently developed an HCM phenotype had greater AMVL length (9.4 mm [25th and 75th quartile, 9.0-10.6 mm] vs. 8.5 mm [25th and 75th quartile, 7.6-9.1 mm], P < 0.0001) and maximal left ventricular wall thickness (4.5 mm [25th and 75th quartile, 4.1-4.7 mm] vs. 4.0 mm [25th and 75th quartile, 3.7-4.6 mm], P = 0.007) than those that did not. Multiple logistic regression analysis confirmed that both baseline variables were independent predictors for development of an HCM phenotype. CONCLUSIONS The AMVL length was greater in cats that subsequently developed left ventricular hypertrophy. Further studies investigating the clinical application of AMVL in the natural history of feline HCM are warranted.
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Affiliation(s)
- J Seo
- Animal Referral Centre, Auckland, New Zealand; School of Veterinary Science, Massey University, Palmerston North, New Zealand; Clinical Science and Services, Royal Veterinary College, Hertfordshire, United Kingdom.
| | - J Novo Matos
- Clinical Science and Services, Royal Veterinary College, Hertfordshire, United Kingdom; Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - J R Payne
- Langford Vets Small Animal Referral Hospital, University of Bristol, Bristol, United Kingdom
| | - V Luis Fuentes
- Clinical Science and Services, Royal Veterinary College, Hertfordshire, United Kingdom
| | - D J Connolly
- Clinical Science and Services, Royal Veterinary College, Hertfordshire, United Kingdom
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Park J, Kim Y, Chun B, Seo J. Rational engineering and applications of functional bioadhesives in biomedical engineering. Biotechnol J 2021; 16:e2100231. [PMID: 34469052 DOI: 10.1002/biot.202100231] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 04/30/2021] [Revised: 08/24/2021] [Accepted: 08/30/2021] [Indexed: 12/31/2022]
Abstract
For the past decades, several bioadhesives have been developed to replace conventional wound closure medical tools such as sutures, staples, and clips. The bioadhesives are easy to use and can minimize tissue damage. They are designed to provide strong adhesion with stable mechanical support on tissue surfaces. However, this monofunctionality of the bioadhesives hinders their practical applications. In particular, a bioadhesive can lose its intended function under harsh tissue environments or delay tissue regeneration during wound healing. Based on several natural and synthetic biomaterials, functional bioadhesives have been developed to overcome the aforementioned limitations. The functional bioadhesives are designed to have specific characteristics such as antimicrobial, cell infiltrative, stimuli-responsive, electrically conductive, and self-healing to ensure stability under harsh tissue conditions, facilitate tissue regeneration, and effectively monitor biosignals. Herein, we thoroughly review the functional bioadhesives from their fundamental background to recent progress with their practical applications for the enhancement of tissue healing and effective biosignal sensing. Furthermore, the future perspectives on the applications of functional bioadhesives and current challenges in their commercialization are also discussed.
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Affiliation(s)
- Jae Park
- Biological Interfaces and Sensor Systems Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seoul, Republic of Korea
| | - Yeonju Kim
- Biological Interfaces and Sensor Systems Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seoul, Republic of Korea
| | - Beomsoo Chun
- Biological Interfaces and Sensor Systems Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seoul, Republic of Korea
| | - Jungmok Seo
- Biological Interfaces and Sensor Systems Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seoul, Republic of Korea
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31
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Kim YN, Shim Y, Lee JY, Lee ST, Seo J, Lee Y, Shin S, Kim S, Choi J, Kim S. 757P Investigation of PARP inhibitor resistance through the analysis of serially collected circulating tumor DNA (ctDNA) in ovarian cancer patients. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1199] [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: 11/26/2022] Open
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Lee Y, Shin H, Lee D, Choi S, Cho I, Seo J. A Lubricated Nonimmunogenic Neural Probe for Acute Insertion Trauma Minimization and Long-Term Signal Recording. Adv Sci (Weinh) 2021; 8:e2100231. [PMID: 34085402 PMCID: PMC8336494 DOI: 10.1002/advs.202100231] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/29/2021] [Indexed: 05/06/2023]
Abstract
Brain-machine interfaces (BMIs) that link the brain to a machine are promising for the treatment of neurological disorders through the bi-directional translation of neural information over extended periods. However, the longevity of such implanted devices remains limited by the deterioration of their signal sensitivity over time due to acute inflammation from insertion trauma and chronic inflammation caused by the foreign body reaction. To address this challenge, a lubricated surface is fabricated to minimize friction during insertion and avoid immunogenicity during neural signal recording. Reduced friction force leads to 86% less impulse on the brain tissue, and thus immediately increases the number of measured signal electrodes by 102% upon insertion. Furthermore, the signal measurable period increases from 8 to 16 weeks due to the prevention of gliosis. By significantly reducing insertion damage and the foreign body reaction, the lubricated immune-stealthy probe surface (LIPS) can maximize the longevity of implantable BMIs.
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Affiliation(s)
- Yeontaek Lee
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Hyogeun Shin
- Center for BioMicrosystemsBrain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- Division of Bio‐Medical Science & Technology, KIST SchoolKorea University of Science and Technology (UST)Seoul02792Republic of Korea
| | - Dongwon Lee
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Sungah Choi
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Il‐Joo Cho
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
- Center for BioMicrosystemsBrain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- Division of Bio‐Medical Science & Technology, KIST SchoolKorea University of Science and Technology (UST)Seoul02792Republic of Korea
- Yonsei‐KIST Convergence Research InstituteYonsei UniversitySeoul03722Republic of Korea
| | - Jungmok Seo
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
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Kim D, Kim S, Park S, Seo J, Kim E, Yang J, Chang S, Choi J, Lee S, Park S. Differences in the clinical characteristics and long-term outcome of peripartum tako-tsubo cardiomyopathy and peripartum cardiomyopathy. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3303] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Some peripartum-associated cardiomyopathy patients present similarly to those of tako-tsubo cardiomyopathy (TCM), little is known about the clinical course of peripartum TCM.
Purpose
To know clinicial characteristics and outcomes of peripartum TCM, in comparison with peripartum cardiomyopathy (PPCM)
Methods and results
Of 31 pregnancy-associated cardiomyopathy patients in a tertiary hospital, 10 cases of peripartum TCM and 21 cases of PPCM were found. Maternal near-missed death was significantly more common in the peripartum TCM group than in the PPCM group (100.0% vs. 76.2%, p=0.030). Complete recovery was observed with all peripartum TCM cases, while 23.8% of the PPCM cases had residual left ventricle (LV) dysfunction. LV ejection fraction greater than 30% on the initial echocardiogram independently predicted early echocardiographic recovery of left ventricular systolic function (odds ratio 331.33, 95% confidence interval 3.87–28402.60, p=0.011). There was no difference between the two groups in terms of the rate of adverse clinical events at 3 years of follow-up (PPCM group: 26.3% [5/19] vs. TCM group: 33.3% [3/9], p=0.750).
Conclusions
One-third of pregnancy-associated cardiomyopathy patients had peripartum TCM. With contemporary supportive care, both PPCM and peripartum TCM patients had a low mortality rate and excellent long-term outcomes.
Kaplan-Meier survival curves for death,
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- D Kim
- inje University Seoul Paik Hospital, Seoul, Korea (Republic of)
| | - S.R Kim
- Samsung Medical Center, Division of cardiology, Department of medicine, Seoul, Korea (Republic of)
| | - S Park
- Samsung Medical Center, Division of cardiology, Department of medicine, Seoul, Korea (Republic of)
| | - J Seo
- Samsung Medical Center, Division of cardiology, Department of medicine, Seoul, Korea (Republic of)
| | - E.K Kim
- Samsung Medical Center, Division of cardiology, Department of medicine, Seoul, Korea (Republic of)
| | - J.H Yang
- Samsung Medical Center, Division of cardiology, Department of medicine, Seoul, Korea (Republic of)
| | - S Chang
- Samsung Medical Center, Division of cardiology, Department of medicine, Seoul, Korea (Republic of)
| | - J Choi
- Samsung Medical Center, Division of cardiology, Department of medicine, Seoul, Korea (Republic of)
| | - S Lee
- Samsung Medical Center, Division of cardiology, Department of medicine, Seoul, Korea (Republic of)
| | - S.W Park
- Samsung Medical Center, Division of cardiology, Department of medicine, Seoul, Korea (Republic of)
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Lee Y, Chung YW, Park J, Park K, Seo Y, Hong SN, Lee SH, Jeon H, Seo J. Lubricant-infused directly engraved nano-microstructures for mechanically durable endoscope lens with anti-biofouling and anti-fogging properties. Sci Rep 2020; 10:17454. [PMID: 33060752 PMCID: PMC7566624 DOI: 10.1038/s41598-020-74517-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 09/18/2020] [Indexed: 11/27/2022] Open
Abstract
While a clear operating field during endoscopy is essential for accurate diagnosis and effective surgery, fogging or biofouling of the lens can cause loss of visibility during these procedures. Conventional cleaning methods such as the use of an irrigation unit, anti-fogging surfactant, or particle-based porous coatings infused with lubricants have been used but proven insufficient to prevent loss of visibility. Herein, a mechanically robust anti-fogging and anti-biofouling endoscope lens was developed by forming a lubricant-infused directly engraved nano-/micro-structured surface (LIDENS) on the lens. This structure was directly engraved onto the lens via line-by-line ablation with a femtosecond laser. This directly engraved nano/microstructure provides LIDENS lenses with superior mechanical robustness compared to lenses with conventional particle-based coatings, enabling the maintenance of clear visibility throughout typical procedures. The LIDENS lens was chemically modified with a fluorinated self-assembled monolayer (F-SAM) followed by infusion of medical-grade perfluorocarbon lubricants. This provides the lens with high transparency (> 70%) along with superior and long-lasting repellency towards various liquids. This excellent liquid repellency was also shown to be maintained during blood dipping, spraying, and droplet condensation experiments. We believe that endoscopic lenses with the LIDENS offer excellent benefits to endoscopic surgery by securing clear visibility for stable operation.
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Affiliation(s)
- Yeontaek Lee
- School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.,Department of Research and Development, Lynk Solutec Inc., 33, Ewhayeodae 3-gil, Seodaemun-gu, Seoul, Republic of Korea
| | - Yong-Woo Chung
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Jaeho Park
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Kijun Park
- School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Youngmin Seo
- School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.,Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Seung-No Hong
- Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, Seoul National University College of Medicine, 25 Shindaebang 2-dong, Dongjak-gu, Seoul, 07061, Republic of Korea
| | - Seung Hoon Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University Ansan Hospital, Korea University College of Medicine, 123, Jeokgeum-ro, Danwon-gu, Ansan, Gyeonggi-do, 15355, Republic of Korea
| | - Hojeong Jeon
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea. .,Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea.
| | - Jungmok Seo
- School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea. .,Graduate Institute of Biomedical Engineering, Chang Gung University, No. 259, Wenhua 1st Rd., Guishan Dist., Taoyuan, 33302, Taiwan.
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35
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Chae K, Jang WY, Park K, Lee J, Kim H, Lee K, Lee CK, Lee Y, Lee SH, Seo J. Antibacterial infection and immune-evasive coating for orthopedic implants. Sci Adv 2020; 6:6/44/eabb0025. [PMID: 33115733 PMCID: PMC7608784 DOI: 10.1126/sciadv.abb0025] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 09/08/2020] [Indexed: 05/22/2023]
Abstract
Bacterial infection and infection-induced immune response have been a life-threatening risk for patients having orthopedic implant surgeries. Conventional biomaterials are vulnerable to biocontamination, which causes bacterial invasion in wounded areas, leading to postoperative infection. Therefore, development of anti-infection and immune-evasive coating for orthopedic implants is urgently needed. Here, we developed an advanced surface modification technique for orthopedic implants termed lubricated orthopedic implant surface (LOIS), which was inspired by slippery surface of Nepenthes pitcher plant. LOIS presents a long-lasting, extreme liquid repellency against diverse liquids and biosubstances including cells, proteins, calcium, and bacteria. In addition, we confirmed mechanical durability against scratches and fixation force by simulating inevitable damages during surgical procedure ex vivo. The antibiofouling and anti-infection capability of LOIS were thoroughly investigated using an osteomyelitis femoral fracture model of rabbits. We envision that the LOIS with antibiofouling properties and mechanical durability is a step forward in infection-free orthopedic surgeries.
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Affiliation(s)
- Kyomin Chae
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Woo Young Jang
- Department of Orthopedic Surgery, Korea University Anam Hospital, Seoul 02841, Republic of Korea
| | - Kijun Park
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Jinhyeok Lee
- Department of Orthopedic Surgery, Korea University Anam Hospital, Seoul 02841, Republic of Korea
| | - Hyunchul Kim
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Kyoungbun Lee
- Department of Pathology, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Chang Kyu Lee
- Department of Laboratory Medicine, Korea University Anam Hospital, Seoul 02841, Republic of Korea
| | - Yeontaek Lee
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Soon Hyuck Lee
- Department of Orthopedic Surgery, Korea University Anam Hospital, Seoul 02841, Republic of Korea.
| | - Jungmok Seo
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea.
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Maeder T, Daffre C, Oliver KI, Lasko NB, Seo J, Ulsa C, Kleim B, Pace-Schott EF. 1067 Replicative and Non-Replicative Nightmares in the Development of Posttraumatic Stress Disorder. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.1063] [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: 11/14/2022] Open
Abstract
Abstract
Introduction
Nightmares are a frequent and disturbing symptom of posttraumatic stress disorder (PTSD). They are associated with sleep disruption and increased psychopathology. There is growing evidence that different types of nightmares may differ in their effects on psychopathology. Previous findings suggest that nightmares that are close replications of the experienced traumatic event might be especially important in the development of PTSD. This study investigated trauma-related (replicative) and non-trauma-related (non-replicative) nightmares as predictors of PTSD in a civilian sample.
Methods
Participants were recruited from the general public of the greater Boston area. The sample consisted of 108 participants who had experienced a psychological trauma in the past 2 years (e.g. sexual or physical assaults and accidents). The criteria for PTSD were met by 49% of participants. PTSD diagnosis was assessed using the Structured Clinical Interview for DSM-IV-TR Axis I Disorders-Non-Patient Edition. Participants received an Actiwatch 2 (Philips Respironics, Bend, OR) and a sleep diary for sleep measurements over an average of 14 consecutive nights. The diary included a prospective nightmare assessment and an item assessing the relatedness of each nightmare to traumatic events. Logistic regression analyses were performed with PTSD as the categorical outcome variable.
Results
Our analyses showed that replicative nightmares were the only statistically significant predictor of PTSD (OR = 1.2, p = .027), while controlling for age, sex, time since the traumatic event, and actigraphy total sleep time and minutes awake after sleep onset. All of these variables, including non-replicative nightmares, did not significantly predict PTSD in our analyses.
Conclusion
This study confirms and adds to the existing knowledge of nightmares and the importance of the degree to which they replicate the trauma in the development of PTSD. These findings underline the potential role of specific nightmare treatments after traumatic events, with a special focus on replicative nightmares.
Support
R01MH109638
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Affiliation(s)
- T Maeder
- University of Zurich, Zurich, SWITZERLAND
| | - C Daffre
- Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - K I Oliver
- Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - N B Lasko
- Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - J Seo
- Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - C Ulsa
- Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - B Kleim
- University of Zurich, Zurich, SWITZERLAND
| | - E F Pace-Schott
- Massachusetts General Hospital, Harvard Medical School, Boston, MA
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37
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Seo J, Oliver KI, Daffre C, Pace-Schott EF. 0065 Initial Findings on Associations Between Sleep and Clinical Measures with Neural Activations Accompanying Fear Conditioning and Extinction in Trauma-Exposed Individuals. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.063] [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: 11/14/2022] Open
Abstract
Abstract
Introduction
We examined associations of sleep and hyperarousal with neural responses to a fear conditioning and extinction protocol in trauma-exposed individuals. We hypothesized, greater hyperarousal, poorer sleep quality and more nightmares would accompany greater activation of the salience network (associated with fear) and lesser activation of the prefrontal cortex (PFC; associated with fear regulation) throughout this protocol.
Methods
Persons exposed to trauma within the past 2 years (N=119, 43 with Post-traumatic stress disorder; PTSD) completed the PTSD Checklist-5 (PCL-5), two weeks of actigraphy and sleep/nightmare diaries, and a 2-day fear-conditioning and extinction protocol during fMRI. Hyperarousal items from PCL-5, sleep quality, and nightmare frequency were used to predict fMRI contrasts representing (1) initial activations to reinforced conditioned stimuli (CS+) during fear conditioning, (2) change in neural activation to CS+s across extinction learning, and, (3) after 24 hours (extinction recall), selective activation to an extinguished (CS+E) versus an un-extinguished CS+.
Results
During fear conditioning, hyperarousal was positively correlated with activation to the CS+ in the right lateral PFC, whereas nightmare frequency was negatively correlated with activations in bilateral orbitofrontal cortex (OFC). Across extinction learning, sleep onset latency (SOL) was negatively correlated with increased activation to CS+ in bilateral insular and dorsal and middle anterior cingulate cortices (salience regions). At extinction recall, nightmare frequency was negatively correlated with selective activation to the CS+E in the left insular cortex.
Conclusion
Except that fewer nightmares predicted greater OFC activation during fear conditioning, results did not support hypothesized relationships of hyperarousal, poor sleep and nightmares with increased salience network and decreased PFC activation to fear-related stimuli.
Support
Funding: R01MH109638
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Affiliation(s)
- J Seo
- Massachusetts General Hospital, Harvard Medical School, Charlestown, MA
| | - K I Oliver
- Massachusetts General Hospital, Harvard Medical School, Charlestown, MA
| | - C Daffre
- Massachusetts General Hospital, Harvard Medical School, Charlestown, MA
| | - E F Pace-Schott
- Massachusetts General Hospital, Harvard Medical School, Charlestown, MA
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Oliver KI, Hinton JA, Daffre C, Dominguez J, Seo J, Gannon K, Lasko NB, Pace-Schott EF. 1081 Associations Among REM Density And Parasympathetic Activity, Nightmares, And Hyperarousal In Trauma-exposed Individuals. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.1077] [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: 11/13/2022] Open
Abstract
Abstract
Introduction
Individuals with posttraumatic stress disorder (PTSD) exhibit autonomic hyperarousal and nightmares. We hypothesized that REM density (REMD) and REM heart rate variability would predict self-reported hyperarousal, nightmares, and PTSD diagnosis in trauma-exposed individuals.
Methods
Ninety-nine individuals (aged 18-40, 68 females) exposed to a DSM-5 PTSD criterion-A trauma within the past two years (48 meeting PTSD criteria) completed a night of ambulatory polysomnography (PSG) preceded by an acclimation night. REMD in scored sleep recordings were computed using the Matlab program written by Benjamin Yetton. Indices of parasympathetic tone during REM were computed using Kubios software and included Average Root Mean Square of the Successive Differences (RMSSD) and High Frequency power (HFpower). Participants completed two weeks of sleep diaries with nightmare questionnaire and completed the Clinician-Administered PTSD Scale (CAPS-5) and the PTSD Checklist for DSM-5 (PCL-5). Hyperarousal-item scores were computed from the PCL-5 without the sleep item (PCLhyp) and from the CAPS-5 (CAPShyp), and these scores (with their sleep items) were combined into a Composite Hyperarousal Index (CHI). Nightmare rate was the proportion of sleep diaries reporting a nightmare. Simple regressions measured associations among REMD, REM parasympathetic indices, hyperarousal measures, and nightmare rate.
Results
REMD did not significantly predict PTSD diagnosis or hyperarousal scores but did predict decreased parasympathetic activity for both RMSSD (p= 0.002, R= -0.316) and HFpower (p= 0.016 R= -0.250). REMD predicted increased nightmare rate (p= 0.011 R= 0.262). Parasympathetic tone was negatively correlated with CAPShyp, PCLhyp, and CHI for both RMSSD (p= 0.04, 0.011, <0.000, respectively) and HFpower (p= 0.051, 0.021, 0.010, respectively). Lower parasympathetic tone also predicted PTSD diagnosis with both RMSSD (p=0.012, t=2.559) and HFpower (p=0.010, t=2.627), but did not predict nightmare rate.
Conclusion
REMD predicted decreased parasympathetic tone and higher nightmare rate. Parasympathetic tone, but not REMD, predicted hyperarousal and PTSD diagnosis.
Support
R01MH109638
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Affiliation(s)
- K I Oliver
- Massachusetts General Hospital, Charlestown, MA
| | - J A Hinton
- Massachusetts General Hospital, Charlestown, MA
| | - C Daffre
- Massachusetts General Hospital, Charlestown, MA
| | - J Dominguez
- Massachusetts General Hospital, Charlestown, MA
| | - J Seo
- Massachusetts General Hospital, Charlestown, MA
| | - K Gannon
- Massachusetts General Hospital, Boston, MA
| | - N B Lasko
- Massachusetts General Hospital, Charlestown, MA
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Kram Mendelsohn A, Daffre C, Oliver KI, Seo J, Lasko NB, Pace-Schott EF. 1071 Subjective Measures Of Hyperarousal Predict Subjective Longitudinal And Retrospective Measures Of Sleep Quality In Individuals Exposed To Trauma. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.1067] [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: 11/14/2022] Open
Abstract
Abstract
Introduction
Hyperarousal and disturbed sleep are intrinsic symptoms of posttraumatic stress disorder (PTSD). We explored whether self-reported indices of hyperarousal predict longitudinally measured objective, subjective, and retrospective evaluations of sleep quality in trauma-exposed individuals.
Methods
Individuals exposed to a DSM-5 PTSD Criterion-A traumatic event within the past two years (N=130, 91 females), aged 18-40 (mean 24.43, SD 5.30), 51.54% of whom met DSM-5 criteria for PTSD, completed 14 days of actigraphy and sleep diaries. Participants also completed the PTSD Checklist for DSM-5 (PCL-5), the Clinician-Administered PTSD Scale (CAPS-5), published Hyperarousal (HAS) and Hypervigilance (HVQ) scales, and the Pittsburgh Sleep Quality Index (PSQI) (N=108-125 for different scales). Mean total sleep time (TST), sleep onset latency (SOL), sleep efficiency (SE) and sleep midpoint were calculated from actigraphy and subjective SOL, SE, number of awakenings, and time spent awake from diaries. Simple regressions were used to predict associations of the PCL-5, HAS, and HVQ scores with measures of sleep quality.
Results
Hyperarousal indices predicted diary but not actigraphy measures of sleep quality. Longer diary-reported SOL was predicted by higher scores for: PCL-5 total score (R=0.290, p=0.001), PCL-5 hyperarousal items without the sleep item (R=0.261, p=0.004), and HAS without sleep items (R=0.220, p=0.016). Diary-reported number of awakenings and wake time after sleep onset were predicted by higher HAS scores without the sleep question: (R=0.373, p<0.001; r=0.352, p<0.001). Similarly, all hyperarousal indices significantly predicted PSQI global score (PCL-5: R=0.482, p<0.001; PCL-5 hyperarousal: R=0.389, p<0.001; HVQ: R=0.214, p=0.017; HAS without sleep question: R=0.415, p<0.001).
Conclusion
Self-reported hyperarousal measures predict subjective longitudinal (especially SOL) and retrospective measures, but not objective measurements of sleep quality. Similar discrepancies between self-reported and objective measures of sleep quality have been reported in patients with insomnia disorder. Cognitive-behavioral therapy for insomnia may be especially effective in treating post-traumatic sleep disturbances.
Support
R01MH109638
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Affiliation(s)
| | - C Daffre
- Massachusetts General Hospital, Charlestown, MA
| | - K I Oliver
- Massachusetts General Hospital, Charlestown, MA
| | - J Seo
- Massachusetts General Hospital, Charlestown, MA
| | - N B Lasko
- Massachusetts General Hospital, Charlestown, MA
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Gomart S, Allaway D, Harrison M, Dickson D, Seo J, Ferasin L, Payne JR, Hezzell MJ, Borgeat K. Long-term biological variability and the generation of a new reference interval for plasma N-terminal pro-B-type natriuretic peptide in Labrador retrievers. J Small Anim Pract 2020; 61:368-373. [PMID: 32297329 DOI: 10.1111/jsap.13136] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 02/26/2020] [Accepted: 02/29/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVES First, to investigate the biological variability of N-terminal pro-B-type natriuretic peptide (NT-proBNP) in healthy Labrador retrievers and compare this with current laboratory recommendations for dilated cardiomyopathy screening. Second, to calculate a breed-specific reference interval and validate it in a retrospective cohort. MATERIALS AND METHODS Plasma NT-proBNP was measured in 51 clinically healthy Labrador retrievers at 0, 2, 4, 6 and 8 weeks. Coefficient of variation for individual dogs over time, the coefficient of variation for the group at each time point and the index of individuality were calculated. A reference interval was derived and tested on a clinical dataset available from four UK cardiology referral centres. RESULTS Median NT-proBNP was 865 pmol/L (315 to 2064 pmol/L). Mean individual coefficient of variation was 19% (95% CI: 16 to 21%) and group coefficient of variation was 43% (95% CI: 41 to 46%), with index of individuality at 0.44. The breed-specific reference interval was 275 to 2100 pmol/L. In the validation group, 93% of NT-proBNP measurements from healthy dogs were within the reference interval. NT-proBNP measurements exceeded the reference interval in 82% of dogs with dilated cardiomyopathy. The upper bound of the reference interval (2100 pmol/L) had a positive predictive value of 90% and a negative predictive value of 87% for identification of dilated cardiomyopathy in this population. CLINICAL SIGNIFICANCE Breed-specific reference intervals might improve the diagnostic accuracy of NT-proBNP measurement. Applying the currently recommended general cut-off value to Labradors is likely to result in frequent false positives and diagnosis would be improved by application of the new breed-specific reference interval calculated here.
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Affiliation(s)
- S Gomart
- Langford Vets, University of Bristol, Bristol, UK
| | - D Allaway
- MARS PetCare Ltd, Waltham Centre for Pet Nutrition, Waltham, UK
| | - M Harrison
- MARS PetCare Ltd, Waltham Centre for Pet Nutrition, Waltham, UK
| | | | - J Seo
- Royal Veterinary College, London, UK
| | - L Ferasin
- Lumbry Park Veterinary Specialists, Alton, UK
| | - J R Payne
- Langford Vets, University of Bristol, Bristol, UK
| | - M J Hezzell
- Bristol Veterinary School, University of Bristol, Bristol, UK
| | - K Borgeat
- Langford Vets, University of Bristol, Bristol, UK
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Lee N, Seo J, Park H, Yoon J. Diagnosis and successful percutaneous ultrasound-guided aspiration treatment of multiple bilomas in a dog. J Small Anim Pract 2020; 61:321-322. [PMID: 32166748 DOI: 10.1111/jsap.13133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 01/13/2020] [Accepted: 01/15/2020] [Indexed: 11/30/2022]
Affiliation(s)
- N Lee
- College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.,Time Animal Medical Center, 57, Dunsan-ro, Seo-gu, Daejeon, 35233, Republic of Korea
| | - J Seo
- Time Animal Medical Center, 57, Dunsan-ro, Seo-gu, Daejeon, 35233, Republic of Korea
| | - H Park
- Time Animal Medical Center, 57, Dunsan-ro, Seo-gu, Daejeon, 35233, Republic of Korea
| | - J Yoon
- College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
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42
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Ahn Y, Seo J, Hwang S, Lee E, Kim J, Park M, Almurayshid A, Yu J, Oh S. 364 Adenosine triphosphate-P2X7 axis mediates melanocyte death and skin trafficking of CD8+ T cells by CXCL9 through inflammasome activation in vitiligo. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.366] [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: 11/30/2022]
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Woo S, Lee S, Chae J, Rim J, Lee J, Seo J, Lee C. Automatic matching of computed tomography and stereolithography data. Comput Methods Programs Biomed 2019; 175:215-222. [PMID: 31104709 DOI: 10.1016/j.cmpb.2019.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 12/22/2018] [Revised: 03/10/2019] [Accepted: 04/02/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND AND OBJECTIVE Computed tomography (CT) is one of the most frequently used medical imaging methods. An important application area of CT is dental implants, which require precise inspection and analysis of oral structures. Since CT provides a precise 3D model of the teeth, bones and nerves, it can be used as a surgical guide for dental implants. Along with CT, optical 3D images called stereolithography (STL) have also been widely used. STL images obtained from optical 3D images can be used to show the 3D surfaces of oral structures. Since CT data and STL data deploy different technologies to obtain dental information, we can obtain more accurate dental implants by combining the two datasets. Since the two datasets are acquired by using different sensors, the datasets need to be registered. METHODS An automatic matching algorithm is proposed for CT and STL image registration, which is based on depth maps and maximum intensity projection. Then, fine tuning was performed based on volume matching. RESULTS When applied to real-world databases, the proposed method provided an average matching error of 2.7 mm for the upper jaw and 2.3 mm for the lower jaw with an average processing time of about 19 s. CONCLUSIONS The proposed method performs accurate registration of CT and STL.
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Affiliation(s)
- S Woo
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea.
| | - S Lee
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea.
| | - J Chae
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea.
| | - J Rim
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea.
| | - J Lee
- Dio Implant, Seoul 182-4, South Korea.
| | - J Seo
- Dio Implant, Seoul 182-4, South Korea.
| | - C Lee
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea.
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Seo J, Jin E, Chung S. Multidirectional colonoscopy quality improvement increases adenoma detection rate: results of the Seoul national university hospital healthcare system Gangnam center colonoscopy quality upgrade project (Gangnam-CUP). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.026] [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: 11/13/2022] Open
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Zheng T, Abadi PPSS, Seo J, Cha BH, Miccoli B, Li YC, Park K, Park S, Choi SJ, Bayaniahangar R, Zhang D, Lee SH, Lee CK, Khademhosseini A, Shin SR. Biocompatible Carbon Nanotube-Based Hybrid Microfiber for Implantable Electrochemical Actuator and Flexible Electronic Applications. ACS Appl Mater Interfaces 2019; 11:20615-20627. [PMID: 31050404 PMCID: PMC6660641 DOI: 10.1021/acsami.9b02927] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Biocompatible, electrically conductive microfibers with superior mechanical properties have received a great attention due to their potential applications in various biomedical applications such as implantable medical devices, biosensors, artificial muscles, and microactuators. Here, we developed an electrically conductive and mechanically stable carbon nanotube-based microactuator with a low degradability that makes it usable for an implantable device in the body or biological environments. The microfiber was composed of hyaluronic acid (HA) hydrogel and single-wall carbon nanotubes (SWCNTs) (HA/SWCNT). HA hydrogel acts as biosurfactant and ion-conducting binder to improve the dispersion of SWCNTs resulting in enhanced electrical and mechanical properties of the hybrid microfiber. In addition, HA was crosslinked to prevent the leaking of the nanotubes from the composite. Crosslinking of HA hydrogel significantly enhances Young's modulus, the failure strain, the toughness, the stability of the electrical conductivity, and the resistance to biodegradation and creep of hybrid microfibers. The obtained crosslinked HA/SWCNT hybrid microfibers show an excellent capacitance and actuation behavior under mechanical loading with a low potential of ±1 V in a biological environment. Furthermore, the HA/SWCNT microfibers exhibit an excellent in vitro viability. Finally, the biocompatibility is shown through the resolution of an early inflammatory response in less than 3 weeks after the implantation of the microfibers in the subcutaneous tissue of mice.
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Affiliation(s)
- Ting Zheng
- Division of Engineering in Medicine, Department of Medicine, Brigham Women’s Hospital, Harvard Medical School, Cambridge, Massachusetts, 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- School of Materials Science and Engineering, Harbin Institute of Technology, 150001, China
| | - Parisa Pour Shahid Saeed Abadi
- Division of Engineering in Medicine, Department of Medicine, Brigham Women’s Hospital, Harvard Medical School, Cambridge, Massachusetts, 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Department of Mechanical Engineering-Engineering Mechanics, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931, USA
| | - Jungmok Seo
- Division of Engineering in Medicine, Department of Medicine, Brigham Women’s Hospital, Harvard Medical School, Cambridge, Massachusetts, 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Byung-Hyun Cha
- Division of Engineering in Medicine, Department of Medicine, Brigham Women’s Hospital, Harvard Medical School, Cambridge, Massachusetts, 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Department of Biomedical Science, CHA University, 13488, Republic of Korea
| | - Beatrice Miccoli
- Division of Engineering in Medicine, Department of Medicine, Brigham Women’s Hospital, Harvard Medical School, Cambridge, Massachusetts, 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Department of Electronics and Telecommunications, Politecnico di Torino, Torino, 10129, Italy
| | - Yi-Chen Li
- Division of Engineering in Medicine, Department of Medicine, Brigham Women’s Hospital, Harvard Medical School, Cambridge, Massachusetts, 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Kijun Park
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Sunghyun Park
- Department of Biomedical Science, CHA University, 13488, Republic of Korea
| | - Seon-Ji Choi
- Division of Engineering in Medicine, Department of Medicine, Brigham Women’s Hospital, Harvard Medical School, Cambridge, Massachusetts, 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Rasoul Bayaniahangar
- Department of Mechanical Engineering-Engineering Mechanics, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931, USA
| | - Dongxing Zhang
- School of Materials Science and Engineering, Harbin Institute of Technology, 150001, China
| | - Soo-Hong Lee
- Department of Biomedical Science, CHA University, 13488, Republic of Korea
| | - Chang-Kee Lee
- Korea Packaging Center, Korea Institute of Industrial Technology, Bucheon, Gyeonggi-do 14449, South Korea
| | - Ali Khademhosseini
- Division of Engineering in Medicine, Department of Medicine, Brigham Women’s Hospital, Harvard Medical School, Cambridge, Massachusetts, 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Department of Bioengineering, Department of Chemical and Biomolecular Engineering, Henry Samueli School of Engineering and Applied Sciences, University of California-Los Angeles, Los Angeles, CA 90095, USA
- California NanoSystems Institute (CNSI), University of California-Los Angeles, Los Angeles, CA 90095, USA
- Department of Bioindustrial Technologies, College of Animal Bioscience and Technology, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 05029, Republic of Korea
- Center of Nanotechnology, Department of Physics, King Abdulaziz University, Jeddah 21569, Saudi Arabia
| | - Su Ryon Shin
- Division of Engineering in Medicine, Department of Medicine, Brigham Women’s Hospital, Harvard Medical School, Cambridge, Massachusetts, 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Fallahi A, Mandla S, Kerr-Phillip T, Seo J, Rodrigues RO, Jodat YA, Samanipour R, Hussain MA, Lee CK, Bae H, Khademhosseini A, Travas-Sejdic J, Shin SR. Flexible and Stretchable PEDOT-Embedded Hybrid Substrates for Bioengineering and Sensory Applications. ChemNanoMat 2019; 5:729-737. [PMID: 33859923 PMCID: PMC8045745 DOI: 10.1002/cnma.201900146] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Indexed: 05/27/2023]
Abstract
Herein, we introduce a flexible, biocompatible, robust and conductive electrospun fiber mat as a substrate for flexible and stretchable electronic devices for various biomedical applications. To impart the electrospun fiber mats with electrical conductivity, poly(3,4-ethylenedioxythiophene) (PEDOT), a conductive polymer, was interpenetrated into nitrile butadiene rubber (NBR) and poly(ethylene glycol) dimethacrylate (PEGDM) crosslinked electrospun fiber mats. The mats were fabricated with tunable fiber orientation, random and aligned, and displayed elastomeric mechanical properties and high conductivity. In addition, bending the mats caused a reversible change in their resistance. The cytotoxicity studies confirmed that the elastomeric and conductive electrospun fiber mats support cardiac cell growth, and thus are adaptable to a wide range of applications, including tissue engineering, implantable sensors and wearable bioelectronics.
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Affiliation(s)
- Afsoon Fallahi
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA, Office: (617) 768-8320,
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Serena Mandla
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA, Office: (617) 768-8320,
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- S. Mandla, Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Thomas Kerr-Phillip
- Dr. T. Kerr-Phillip, Prof. J. Travas-Sejdic, Polymer Electronics Research Centre (PERC), School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland, New Zealand
- Dr. T. Kerr-Phillip, Prof. J. Travas-Sejdic, The MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
| | - Jungmok Seo
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA, Office: (617) 768-8320,
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Prof. J. Seo, Centre for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, 14 Hwarang-ro, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Raquel O Rodrigues
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA, Office: (617) 768-8320,
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- R. O. Rodrigues, Laboratory of Separation and Reaction Engineering, Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Yasamin A Jodat
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA, Office: (617) 768-8320,
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Y. A. Jodat, Department of Mechanical Engineering, Stevens Institute of Technology, New Jersey, USA
| | - Roya Samanipour
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA, Office: (617) 768-8320,
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Dr. R. Samanipour, School of Engineering, University of British Columbia, Okanagan, BC, Canada
| | - Mohammad Asif Hussain
- Prof. M. A. Hussain, Department of Electrical and Computer Engineering, Faculty of Engineering, King Abdulaziz University, P.O. Box 80204, Jeddah 21589, Saudi Arabia
| | - Chang Kee Lee
- Dr. C. K. Lee, Korea Packaging Center, Korea Institute of Industrial Technology, Bucheon, Republic of Korea
| | - Hojae Bae
- Prof. H. Bae, Prof. A. Khademhosseini, KU Convergence Science and Technology Institute, Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul, 05029, Republic of Korea
| | - Ali Khademhosseini
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA, Office: (617) 768-8320,
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Prof. H. Bae, Prof. A. Khademhosseini, KU Convergence Science and Technology Institute, Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul, 05029, Republic of Korea
- Prof. A. Khademhosseini, Department of Bioengineering, Department of Chemical and Biomolecular Engineering, Henry Samueli School of Engineering and Applied Sciences, University of California-Los Angeles, Los Angeles, CA 90095, USA
- Prof. A. Khademhosseini, Department of Radiology, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, CA 90095, USA
- Prof. A. Khademhosseini, California NanoSystems Institute (CNSI), University of California-Los Angeles, Los Angeles, CA 90095, USA
- Prof. A. Khademhosseini, Centre for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute, University of California - Los Angeles, Los Angeles, CA 90095, USA
| | - Jadranka Travas-Sejdic
- Dr. T. Kerr-Phillip, Prof. J. Travas-Sejdic, Polymer Electronics Research Centre (PERC), School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland, New Zealand
- Dr. T. Kerr-Phillip, Prof. J. Travas-Sejdic, The MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
| | - Su Ryon Shin
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA, Office: (617) 768-8320,
- Dr. A. Fallahi, S. Mandla, Prof. J. Seo, R. O. Rodrigues, Y. A. Jodat, Dr. R. Samanipour, Prof. A. Khademhosseini, Dr. S. R. Shin, Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Park K, Lee Y, Seo J. Recent Advances in High-throughput Platforms with Engineered Biomaterial Microarrays for Screening of Cell and Tissue Behavior. Curr Pharm Des 2019; 24:5458-5470. [DOI: 10.2174/1381612825666190207093438] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 02/02/2019] [Indexed: 02/06/2023]
Abstract
In the last decades, bioengineers have developed myriad biomaterials for regenerative medicine. Development of screening techniques is essential for understanding complex behavior of cells in the biological microenvironments. Conventional approaches to the screening of cellular behavior in vitro have limitations in terms of accuracy, reusability, labor-intensive screening, and versatility. Thus, drug screening and toxicology test through in vitro screening platforms have been underwhelming. Recent advances in the high-throughput screening platforms somewhat overcome the limitations of in vitro screening platforms via repopulating human tissues’ biophysical and biomchemical microenvironments with the ability to continuous monitoring of miniaturized human tissue behavior. Herein, we review current trends in the screening platform in which a high-throughput system composed of engineered microarray devices is developed to investigate cell-biomaterial interaction. Furthermore, diverse methods to achieve continuous monitoring of cell behavior via developments of biosensor integrated high-throughput platforms, and future perspectives on high-throughput screening will be provided.
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Affiliation(s)
- Kijun Park
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Korea
| | - Yeontaek Lee
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Korea
| | - Jungmok Seo
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Korea
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48
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Ko B, Kim N, Seo J, Kim H, Gong G, Kim S, Son B, Ahn SH. Abstract P3-13-01: Application of supine MRI-based 3D printing breast surgical guide for precision breast-conserving surgery. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p3-13-01] [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: 11/16/2022]
Abstract
Abstract
Background
If the size of the tumor is large, neoadjuvant systemic therapy (NST) is performed to reduce the size of the tumor and to conserve the breast. It is known that magnetic resonance imaging is more accurate than mammography (MMG) or ultrasonography (USG) in determining the area of residual cancer in breast-conserving surgery (BSG) after NST. However, there are some problems when performing BCS using MRI. Because the posture of MRI test is different from the posture at surgery, it is difficult to accurately mark the area of the tumor observed in MRI. Neoadjuvant systemic therapy reduces tumor size and often makes it difficult to detect the original tumor area on preoperative MRI. Even if the tumor is not visible in the image, the cancer cells may remain, so it is important to accurately indicate the extent of the initial tumor and remove it. Until now, however, there has been no way to accurately mark past breast tumors in the breast. We have developed a breast surgical guide (BSG) that can mark a range of tumor directly on the breast using three-dimensional printing technology based on supine MRI. This study analyzed the results of patients who underwent BCS using a 3D printing breast surgical guide (3D-BSG) based on supine MRI.
Methods
This trial was designed as a prospective single-institution cohort study. Our study protocol was approved by the Institutional Review Board of Asan Medical Center, Seoul, Korea (IRB No. 2016-1237). Patients who were expected to undergo BCS after NST were enrolled in this study and supine MRI was performed before and after NST. From MRI images, morphological shapes of breasts and tumors were modeled. The prepared digital model was saved in stereolithography file format and then exported to a 3D printer. 3D-BSG is designed to be able to mark the skin and attach the dye injecting column to mark the around the tumor. The breast tissue was removed with blue dye on the basis of the border. To obtain tumor free margin, intraoperative frozen sections were identified in several cavities and re-excision was performed if tumor positive.
Results
Between January 2016 and May 2017, 50 patients were enrolled in the study. BCS was applied to 40 patients, except for those who were rejected or mastectomy. Complete remission was observed in 15 patients after NST. Four patients had tumor positive on resection margins on frozen biopsy during operation, two with IDC and two with DCIS. Re-excision was performed in these patients and tumor negative margin was confirmed in all patients in the final pathology results. The median size of the long axis of the tumor was 1.7 cm (range, 0.5 to 4.5 cm) and the median size of the long axis of the removed breast tissue was 5.1 cm (range, 2.3 to 8.1 cm). The distance between tumor and resection margin was 1.2 cm (range, 0.1 to 4.8 cm)..
Conclusions
In BCS, the application of the supine MRI based 3D-BSG showed low rates of positive margins. Unlike conventional localization techniques, application of 3D-BSG does not cause pain to the patient, has no radiation exposure, and has no time required for the localization procedure, so it will be helpful for patients in BCS in the future.
Citation Format: Ko B, Kim N, Seo J, Kim H, Gong G, Kim S, Son B, Ahn SH. Application of supine MRI-based 3D printing breast surgical guide for precision breast-conserving surgery [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P3-13-01.
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Affiliation(s)
- B Ko
- Asan Medical Center, University of Ulsan, Seoul, Republic of Korea
| | - N Kim
- Asan Medical Center, University of Ulsan, Seoul, Republic of Korea
| | - J Seo
- Asan Medical Center, University of Ulsan, Seoul, Republic of Korea
| | - H Kim
- Asan Medical Center, University of Ulsan, Seoul, Republic of Korea
| | - G Gong
- Asan Medical Center, University of Ulsan, Seoul, Republic of Korea
| | - S Kim
- Asan Medical Center, University of Ulsan, Seoul, Republic of Korea
| | - B Son
- Asan Medical Center, University of Ulsan, Seoul, Republic of Korea
| | - SH Ahn
- Asan Medical Center, University of Ulsan, Seoul, Republic of Korea
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Kim H, Han H, Lee S, Woo J, Seo J, Lee T. Nonfluorinated Superomniphobic Surfaces through Shape-Tunable Mushroom-like Polymeric Micropillar Arrays. ACS Appl Mater Interfaces 2019; 11:5484-5491. [PMID: 30576594 DOI: 10.1021/acsami.8b17181] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Superomniphobic surfaces showing extremely liquid-repellent properties have received a great amount of attention as they can be used in various industrial and biomedical applications. However, so far, the fabrication processes of these materials mostly have involved the coating of perfluorocarbons onto micro- and nanohierarchical structures of these surfaces, which inevitably causes environmental pollution, leading to health concerns. Herein, we developed a facile method to obtain flexible superomniphobic surfaces without perfluorocarbon coatings that have shape-tunable mushroom-like micropillars (MPs). Inspired by the unique structures on the skin of springtails, we fabricated mushroom-like structures with downward facing edges (i.e., a doubly re-entrant structure) on a surface. The flexible MP structures were fabricated using a conventional micromolding technique, and the shapes of the mushroom caps were made highly tunable via the deposition of a thin aluminum (Al) layer. Due to the compressive residual stress of the Al, the mushroom caps were observed to bend toward the polymer upon forming doubly re-entrant-MP structures. The obtained surface was found to repel most low-surface-tension liquids such as oils, alcohols, and even fluorinated solvents. The developed flexible superomniphobic surface showed liquid repellency even upon mechanical stretching and after surface energy modification. We envision that the developed superomniphobic surface with high flexibility and wetting resistance after surface energy modification will be used in a wide range of applications such as self-cleaning clothes and gloves.
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Affiliation(s)
- Hyunchul Kim
- School of Electrical and Electronic Engineering , Yonsei University , Seoul 03722 , Republic of Korea
| | - Heetak Han
- School of Electrical and Electronic Engineering , Yonsei University , Seoul 03722 , Republic of Korea
| | - Sanggeun Lee
- School of Electrical and Electronic Engineering , Yonsei University , Seoul 03722 , Republic of Korea
| | - Janghoon Woo
- School of Electrical and Electronic Engineering , Yonsei University , Seoul 03722 , Republic of Korea
| | - Jungmok Seo
- Center for Biomaterials, Biomedical Research Institute , Korea Institute of Science and Technology (KIST) , Seoul 02792 , Republic of Korea
| | - Taeyoon Lee
- School of Electrical and Electronic Engineering , Yonsei University , Seoul 03722 , Republic of Korea
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Kong M, Lee J, Yazdi IK, Miri AK, Lin YD, Seo J, Zhang YS, Khademhosseini A, Shin SR. Cardiac Fibrotic Remodeling on a Chip with Dynamic Mechanical Stimulation. Adv Healthc Mater 2019; 8:e1801146. [PMID: 30609312 PMCID: PMC6546425 DOI: 10.1002/adhm.201801146] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [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: 09/13/2018] [Revised: 11/07/2018] [Indexed: 12/19/2022]
Abstract
Cardiac tissue is characterized by being dynamic and contractile, imparting the important role of biomechanical cues in the regulation of normal physiological activity or pathological remodeling. However, the dynamic mechanical tension ability also varies due to extracellular matrix remodeling in fibrosis, accompanied with the phenotypic transition from cardiac fibroblasts (CFs) to myofibroblasts. It is hypothesized that the dynamic mechanical tension ability regulates cardiac phenotypic transition within fibrosis in a strain-mediated manner. In this study, a microdevice that is able to simultaneously and accurately mimic the biomechanical properties of the cardiac physiological and pathological microenvironment is developed. The microdevice can apply cyclic compressions with gradient magnitudes (5-20%) and tunable frequency onto gelatin methacryloyl (GelMA) hydrogels laden with CFs, and also enables the integration of cytokines. The strain-response correlations between mechanical compression and CFs spreading, and proliferation and fibrotic phenotype remolding, are investigated. Results reveal that mechanical compression plays a crucial role in the CFs phenotypic transition, depending on the strain of mechanical load and myofibroblast maturity of CFs encapsulated in GelMA hydrogels. The results provide evidence regarding the strain-response correlation of mechanical stimulation in CFs phenotypic remodeling, which can be used to develop new preventive or therapeutic strategies for cardiac fibrosis.
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Affiliation(s)
- Ming Kong
- College of Marine Life Science, Ocean University of China, Yushan Road, Qingdao, Shandong Province 266003, China
- Department of Medicine, Division of Engineering in Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Junmin Lee
- Department of Medicine, Division of Engineering in Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
- Department of Bioengineering, Department of Chemical and Biomolecular Engineering, Henry Samueli School of Engineering and Applied Sciences, University of California-Los Angeles, Los Angeles, CA90095, USA
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA90095, USA
- California NanoSystems Institute (CNSI), University of California-Los Angeles, Los Angeles, CA90095, USA
| | - Iman K. Yazdi
- Department of Medicine, Division of Engineering in Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Amir K. Miri
- Department of Medicine, Division of Engineering in Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Yi-Dong Lin
- Divisions of Genetics and Cardiovascular Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA02115, USA
| | - Jungmok Seo
- Department of Medicine, Division of Engineering in Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, 14 Hwarang-ro, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Yu Shrike Zhang
- Department of Medicine, Division of Engineering in Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ali Khademhosseini
- Department of Medicine, Division of Engineering in Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Bioengineering, Department of Chemical and Biomolecular Engineering, Henry Samueli School of Engineering and Applied Sciences, University of California-Los Angeles, Los Angeles, CA90095, USA
- Department of Radiology, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, CA90095, USA
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA90095, USA
- California NanoSystems Institute (CNSI), University of California-Los Angeles, Los Angeles, CA90095, USA
- Department of Bioindustrial Technologies, College of Animal Bioscience and Technology, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Su Ryon Shin
- Department of Medicine, Division of Engineering in Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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