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Ahn YS, Woo SH, Kim S, Lim JH, An TH, Kim MS. Does the coronoid fracture in terrible triad injury always need to be fixed? BMC Surg 2024; 24:125. [PMID: 38664803 PMCID: PMC11044357 DOI: 10.1186/s12893-024-02394-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 03/20/2024] [Indexed: 04/29/2024] Open
Abstract
BACKGROUND The ideal treatment of terrble triad injuries and whether fixation of coronoid process fractures is needed or not are still debated. Therefore, we aimed to investigate if terrible triad injuries necessitate coronoid fracture fixation and evaluate if non-fixation treatments have similar efficacies and outcomes as fixation-treatments in cases of terrible triad injuries. METHODS From August 2011 to July 2020, 23 patients with acute terrible triad injuries without involvement of the anteromedial facet of the coronoid process were included to evaluate the postoperative clinical and radiological outcomes (minimum follow-up of 20 months). According to the preoperative height loss evaluation of the coronoid process and an intraoperative elbow stability test, seven patients underwent coronoid fracture fixation, and the other eight patients were treated conservatively. The elbow range of motion (ROM), Mayo Elbow Performance Score (MEPS), and modified Broberg-Morrey score were evaluated at the last follow-up. In addition, plain radiographs were reviewed to evaluate joint congruency, fracture union, heterotopic ossification, and the development of arthritic changes. RESULTS At the last follow-up, the mean arcs of flexion-extension and supination-pronation values were 118.2° and 146.8° in the fixation group and 122.5° and 151.3° in the non-fixation group, respectively. The mean MEPSs were 96.4 in the fixation group (excellent, nine cases; good, tow cases) and 96.7 in the non-fixation group (excellent, ten cases; good, two cases). The mean modified Broberg-Morrey scores were 94.0 in the fixation group (excellent, sevev cases; good, four cases) and 94.0 in the non-fixation group (excellent, ten cases; good, tow cases). No statistically significant differences in clinical scores and ROM were identified between the two groups. However, the non-fixation group showed a significantly lower height loss of the coronoid process than the fixation group (36.3% versus 54.5%). CONCLUSIONS There were no significant differences in clinical outcomes between the fixation and non-fixation groups in terrible triad injuries.
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Affiliation(s)
- Yeong-Seub Ahn
- Department of Orthopaedic Surgery, Chonnam National University Hospital, Chonnam National University College of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 61469, South Korea
- Department of Orthopaedic Surgery, Good Morning General Hospital, Pyeongtaek, Republic of Korea
| | - Seong-Hwan Woo
- Department of Orthopaedic Surgery, Chonnam National University Hospital, Chonnam National University College of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 61469, South Korea
| | - Sungmin Kim
- Department of Orthopaedic Surgery, Chonnam National University Hospital, Chonnam National University College of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 61469, South Korea
| | - Jun-Hyuk Lim
- Department of Orthopaedic Surgery, Chonnam National University Hospital, Chonnam National University College of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 61469, South Korea
| | - Tae-Hoon An
- Department of Orthopaedic Surgery, Chonnam National University Hospital, Chonnam National University College of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 61469, South Korea
| | - Myung-Sun Kim
- Department of Orthopaedic Surgery, Chonnam National University Hospital, Chonnam National University College of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 61469, South Korea.
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Lee CH, Jung ST, Park CG, Kim J, Kang GR, Kim S. Minimally invasive surgical technique for unstable supracondylar humerus fractures in children (Gartland type III or IV). Front Pediatr 2024; 12:1352887. [PMID: 38720943 PMCID: PMC11076715 DOI: 10.3389/fped.2024.1352887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 04/15/2024] [Indexed: 05/12/2024] Open
Abstract
Background Achieving and maintaining anatomical reduction during the treatment of pediatric humerus fractures, classified as Gartland type III or IV, presents a clinical challenge. Herein, we present a minimally invasive surgical approach using a novel and simple K-wire push technique that aids in achieving and maintaining anatomical reduction. Methods We reviewed data of children receiving treatment for supracondylar fractures of the humerus at our hospital between January 2016 and December 2020. Patients were divided into two groups based on the method of treatment: Group 1 was treated with the K-wire push technique, and Group 2 was treated with the standard technique as described by Rockwood and Wilkins. The medical records and radiographic images were reviewed. In total, 91 patients with Gartland types III and IV fractures were included, with 37 and 54 patients in Groups 1 and 2, respectively. Results The postoperative reduction radiographic parameters and Flynn scores at final follow-up were not significantly different between the two groups. Conclusion The minimally invasive K-wire push technique for unstable supracondylar fractures in children is a safe and effective alternative for improving reduction. Using this technique, complications can be minimized, and the requirement for open reduction can be reduced.
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Affiliation(s)
- Chang-Hyun Lee
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Sung-Taek Jung
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Chun-Gon Park
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Joonyeong Kim
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Gyo Rim Kang
- Department of Orthopedic Surgery, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Sungmin Kim
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
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Zhang W, Yao H, Khare R, Zhang P, Yang B, Hu W, Ray D, Hu J, Camaioni DM, Wang H, Kim S, Lee MS, Sarazen ML, Chen JG, Lercher JA. Chloride and Hydride Transfer as Keys to Catalytic Upcycling of Polyethylene into Liquid Alkanes. Angew Chem Int Ed Engl 2024; 63:e202319580. [PMID: 38433092 DOI: 10.1002/anie.202319580] [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: 12/18/2023] [Revised: 01/24/2024] [Accepted: 02/19/2024] [Indexed: 03/05/2024]
Abstract
Transforming polyolefin waste into liquid alkanes through tandem cracking-alkylation reactions catalyzed by Lewis-acid chlorides offers an efficient route for single-step plastic upcycling. Lewis acids in dichloromethane establish a polar environment that stabilizes carbenium ion intermediates and catalyzes hydride transfer, enabling breaking of polyethylene C-C bonds and forming C-C bonds in alkylation. Here, we show that efficient and selective deconstruction of low-density polyethylene (LDPE) to liquid alkanes is achieved with anhydrous aluminum chloride (AlCl3) and gallium chloride (GaCl3). Already at 60 °C, complete LDPE conversion was achieved, while maintaining the selectivity for gasoline-range liquid alkanes over 70 %. AlCl3 showed an exceptional conversion rate of 5000g L D P E m o l c a t - 1 h - 1 ${{{\rm g}}_{{\rm L}{\rm D}{\rm P}{\rm E}}{{\rm \ }{\rm m}{\rm o}{\rm l}}_{{\rm c}{\rm a}{\rm t}}^{-1}{{\rm \ }{\rm h}}^{-1}}$ , surpassing other Lewis acid catalysts by two orders of magnitude. Through kinetic and mechanistic studies, we show that the rates of LDPE conversion do not correlate directly with the intrinsic strength of the Lewis acids or steric constraints that may limit the polymer to access the Lewis acid sites. Instead, the rates for the tandem processes of cracking and alkylation are primarily governed by the rates of initiation of carbenium ions and the subsequent intermolecular hydride transfer. Both jointly control the relative rates of cracking and alkylation, thereby determining the overall conversion and selectivity.
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Affiliation(s)
- Wei Zhang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory (PNNL), Richland, Washington, 99354, USA
- Department of Chemistry and Catalysis Research Center, Technical University of Munich (TUM), Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Hai Yao
- Department of Chemistry and Catalysis Research Center, Technical University of Munich (TUM), Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Rachit Khare
- Department of Chemistry and Catalysis Research Center, Technical University of Munich (TUM), Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Peiran Zhang
- Department of Chemistry and Catalysis Research Center, Technical University of Munich (TUM), Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Boda Yang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory (PNNL), Richland, Washington, 99354, USA
| | - Wenda Hu
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory (PNNL), Richland, Washington, 99354, USA
| | - Debmalya Ray
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory (PNNL), Richland, Washington, 99354, USA
| | - Jianzhi Hu
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory (PNNL), Richland, Washington, 99354, USA
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington, 99164, USA
| | - Donald M Camaioni
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory (PNNL), Richland, Washington, 99354, USA
| | - Huamin Wang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory (PNNL), Richland, Washington, 99354, USA
| | - Sungmin Kim
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory (PNNL), Richland, Washington, 99354, USA
| | - Mal-Soon Lee
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory (PNNL), Richland, Washington, 99354, USA
| | - Michele L Sarazen
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey, 08544, USA
| | - Jingguang G Chen
- Department of Chemical Engineering, Columbia University, New York, 10027, USA
| | - Johannes A Lercher
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory (PNNL), Richland, Washington, 99354, USA
- Department of Chemistry and Catalysis Research Center, Technical University of Munich (TUM), Lichtenbergstrasse 4, 85747, Garching, Germany
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Lim JH, Ahn YS, Kim S, Kim MS. Novel Use of a Fibular Strut Allograft with Fibular Head in an Elderly Patient with Proximal Humeral Fracture and Severe Metaphyseal Comminution: An Alternative to Shoulder Arthroplasty. J Clin Med 2024; 13:2200. [PMID: 38673473 PMCID: PMC11050512 DOI: 10.3390/jcm13082200] [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: 02/29/2024] [Revised: 04/01/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
Treatment of a comminuted proximal humerus fracture (PHF) in elderly patients with severe osteoporosis is challenging, often leading to arthroplasty (such as hemiarthroplasty or reverse shoulder arthroplasty) as the treatment of choice. However, arthroplasty does not always guarantee favorable outcomes. In contrast, the use of intramedullary fibular strut allografts provides additional reduction stability during locking plate fixation; however, to our knowledge, there is limited literature on the use of fibular strut allografts, including the fibular head. Here we aim to report the advantages of using a fibular strut containing the fibular head in severe osteoporotic PHFs. We present the case of an 88-year-old female patient with severe osteoporosis diagnosed with a left PHF accompanied by severe metaphyseal comminution following a fall from a chair. Rather than shoulder arthroplasty, we performed osteosynthesis using a fibular strut allograft containing the fibular head. At the one-year follow-up after surgery, we observed excellent bony union and a favorable functional outcome without major complications, such as reduction loss. The novel use of a fibular strut allograft containing the fibular head could be promising for PHFs with severe metaphyseal comminution, potentially avoiding the need for arthroplasty.
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Affiliation(s)
- Jun-Hyuk Lim
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital, Dong-gu, Gwangju 61469, Republic of Korea; (J.-H.L.); (S.K.)
| | - Yeong-Seub Ahn
- Department of Orthopedic Surgery, Good Morning General Hospital, Pyeongtaek 17874, Republic of Korea;
| | - Sungmin Kim
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital, Dong-gu, Gwangju 61469, Republic of Korea; (J.-H.L.); (S.K.)
| | - Myung-Sun Kim
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital, Dong-gu, Gwangju 61469, Republic of Korea; (J.-H.L.); (S.K.)
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Shin Y, Kim S, Liang G, An W. MMP-9-dependent proteolysis of the histone H3 N-terminal tail: a critical epigenetic step in driving oncogenic transcription and colon tumorigenesis. Mol Oncol 2024. [PMID: 38600695 DOI: 10.1002/1878-0261.13652] [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: 09/19/2023] [Revised: 03/08/2024] [Accepted: 04/03/2024] [Indexed: 04/12/2024] Open
Abstract
Matrix metalloproteinase 9 (MMP-9) is a member of the MMP family and has been recently identified as a nuclear protease capable of clipping histone H3 N-terminal tails (H3NT). This MMP-9-dependent H3NT proteolysis is critical for establishing an active state of gene transcription during osteoclast differentiation and melanoma development. However, whether H3NT cleavage by MMP-9 plays a similar role in other cellular events has not been explored. Here, we dissect the functional contribution of MMP-9-dependent H3NT clipping to colonic tumorigenesis by using a combination of genome-wide transcriptome data, ChIP/ChIPac-qPCR, CRISPR/dCas9 gene-targeting system, and in vivo xenograft models. We show that MMP-9 is overexpressed in colon cancer cells and catalyzes H3NT proteolysis to drive transcriptional activation of growth stimulatory genes. Our studies using knockdown and inhibition approaches clearly indicate that MMP-9 mediates transcriptional activation and promotes colonic tumorigenesis in a manner dependent on its protease activity toward H3NT. Remarkably, artificial H3NT proteolysis at target gene promoters with dCAS9-MMP-9 is sufficient for establishing their transcriptional competence in colon cancer cells, underscoring the importance of MMP-9-dependent H3NT proteolysis per se in the transactivation process. Our data establish new functions and mechanisms for MMP-9 in driving the oncogenic transcription program in colon cancer through H3NT proteolysis, and demonstrate how this epigenetic pathway can be exploited as a potential therapeutic target for cancer treatment.
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Affiliation(s)
- Yonghwan Shin
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, USA
| | - Sungmin Kim
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, USA
| | - Gangning Liang
- Department of Urology, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, USA
| | - Woojin An
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, USA
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An SY, Jin SA, Seo HJ, Lee YR, Kim S, Jeon BH, Jeong JO. Protective effect of secretory APE1/Ref-1 on doxorubicin-induced cardiotoxicity via suppression of ROS and p53 pathway. ESC Heart Fail 2024; 11:1182-1193. [PMID: 38286792 DOI: 10.1002/ehf2.14686] [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: 08/24/2023] [Revised: 11/28/2023] [Accepted: 12/28/2023] [Indexed: 01/31/2024] Open
Abstract
AIMS The clinical application of doxorubicin (DOX), a potent anthracycline anticancer drug that effectively treats various malignancies, is limited by its side effects, such as cardiomyopathy. Apurinic/apyrimidinic endonuclease 1/redox factor-1 (APE1/Ref-1) is a multifunctional protein that can be secreted and is a promising target for the reduction of DOX-induced inflammation and oxidative stress. We aimed to investigate the protective role of secretory APE1/Ref-1 against DOX-induced cardiac injury. METHODS AND RESULTS Designated adenoviral preprotrypsin-leading sequence APE1/Ref-1 (Ad-PPTLS-APE1/Ref-1) was used to overexpress secretory APE1/Ref-1 and assess its role in preventing DOX-induced cardiomyopathy in vitro. Our findings revealed that exposure to secretory APE1/Ref-1 significantly decreased N-terminal pro-B-type natriuretic peptide levels in DOX-treated H9C2 cells. In addition, secretory APE1/Ref-1 reduced the severity of cardiomyocyte injury and apoptosis in both in vitro and in vivo DOX-induced cardiotoxicity models. The observed cardioprotective effects of secretory APE1/Ref-1 were mediated via inhibition of the p53 signalling pathway and enhancement of cell viability through attenuation of oxidative stress in DOX-treated cardiomyocytes. CONCLUSIONS Our study provides evidence that secretory APE1/Ref-1 has the potential to inhibit DOX-induced cardiac toxicity by inhibiting oxidative stress and p53 related apoptosis both in vitro and in vivo. These findings suggest that secretory APE1/Ref-1 supplementation is a promising strategy to attenuate DOX-induced cardiomyocyte damage in a preclinical model. Further clinical investigations are essential to validate the therapeutic efficacy and safety of the intervention in human subjects.
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Affiliation(s)
- Soo Yeon An
- Division of Cardiology, Department of Internal Medicine, Chungnam National University Hospital, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
- Department of Medical Sciences, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Seon-Ah Jin
- Division of Cardiology, Department of Internal Medicine, Chungnam National University Hospital, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
- Research Institute for Medical Sciences, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Hee Jeong Seo
- Research Institute for Medical Sciences, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Yu Ran Lee
- Research Institute for Medical Sciences, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
- Department of Physiology, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Sungmin Kim
- Department of Medical Sciences, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
- Department of Physiology, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Byeong Hwa Jeon
- Department of Medical Sciences, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
- Research Institute for Medical Sciences, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
- Department of Physiology, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Jin-Ok Jeong
- Division of Cardiology, Department of Internal Medicine, Chungnam National University Hospital, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
- Research Institute for Medical Sciences, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
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Choi MS, Chang JS, Kim K, Kim JH, Kim TH, Kim S, Cha H, Cho O, Choi JH, Kim M, Kim J, Kim TG, Yeo SG, Chang AR, Ahn SJ, Choi J, Kang KM, Kwon J, Koo T, Kim MY, Choi SH, Jeong BK, Jang BS, Jo IY, Lee H, Kim N, Park HJ, Im JH, Lee SW, Cho Y, Lee SY, Chang JH, Chun J, Lee EM, Kim JS, Shin KH, Kim YB. Corrigendum to 'Assessment of deep learning-based auto-contouring on interobserver consistency in target volume and organs-at-risk delineation for breast cancer: Implications for RTQA program in a multi-institutional study' [The Breast 73 (2024) 103599]. Breast 2024; 74:103624. [PMID: 38161095 PMCID: PMC10985602 DOI: 10.1016/j.breast.2023.103624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024] Open
Affiliation(s)
- Min Seo Choi
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jee Suk Chang
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Kyubo Kim
- Department of Radiation Oncology, Ewha Womans University College of Medicine, Seoul, Republic of Korea; Department of Radiation Oncology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea
| | - Jin Hee Kim
- Department of Radiation Oncology, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea
| | - Tae Hyung Kim
- Department of Radiation Oncology, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul, Republic of Korea
| | - Sungmin Kim
- Department of Radiation Oncology, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Hyejung Cha
- Department of Radiation Oncology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Oyeon Cho
- Department of Radiation Oncology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Jin Hwa Choi
- Department of Radiation Oncology, Chung-Ang University Hospital, Seoul, Republic of Korea
| | - Myungsoo Kim
- Department of Radiation Oncology, Incheon St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Juree Kim
- Department of Radiation Oncology, Ilsan CHA Medical Center, CHA University School of Medicine, Goyang, Republic of Korea
| | - Tae Gyu Kim
- Department of Radiation Oncology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Republic of Korea
| | - Seung-Gu Yeo
- Department of Radiation Oncology, Soonchunhyang University College of Medicine, Soonchunhyang University Hospital, Bucheon, Republic of Korea
| | - Ah Ram Chang
- Department of Radiation Oncology, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - Sung-Ja Ahn
- Department of Radiation Oncology, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Jinhyun Choi
- Department of Radiation Oncology, Jeju National University Hospital, Jeju University College of Medicine, Republic of Korea
| | - Ki Mun Kang
- Gyeongsang National University Changwon Hospital, Gyeongsang National University College of Medicine, Jinju, Republic of Korea
| | - Jeanny Kwon
- Department of Radiation Oncology, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Taeryool Koo
- Department of Radiation Oncology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea
| | - Mi Young Kim
- Department of Radiation Oncology, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea
| | - Seo Hee Choi
- Department of Radiation Oncology, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - Bae Kwon Jeong
- Department of Radiation Oncology, Gyeongsang National University Hospital, Gyeongsang National University College of Medicine, Jinju, Republic of Korea
| | - Bum-Sup Jang
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea; Department of Radiation Oncology, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Republic of Korea
| | - In Young Jo
- Department of Radiation Oncology, Soonchunhyang University Hospital, Cheonan, Republic of Korea
| | - Hyebin Lee
- Department of Radiation Oncology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Nalee Kim
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Hae Jin Park
- Department of Radiation Oncology, Hanyang University College of Medicine, Seoul, Republic of Korea
| | - Jung Ho Im
- Department of Radiation Oncology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Republic of Korea
| | - Sea-Won Lee
- Department of Radiation Oncology, Eunpyeong St. Mary's Hospital, Catholic University of Korea College of Medicine, Seoul, Republic of Korea
| | - Yeona Cho
- Department of Radiation Oncology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Sun Young Lee
- Department of Radiation Oncology, Chonbuk National University Hospital, Jeonju, Republic of Korea
| | - Ji Hyun Chang
- Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jaehee Chun
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Eung Man Lee
- Department of Radiation Oncology, Ewha Womans University College of Medicine, Seoul, Republic of Korea
| | - Jin Sung Kim
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea; Oncosoft Inc., Seoul, Republic of Korea.
| | - Kyung Hwan Shin
- Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Yong Bae Kim
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea
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Choi MS, Chang JS, Kim K, Kim JH, Kim TH, Kim S, Cha H, Cho O, Choi JH, Kim M, Kim J, Kim TG, Yeo SG, Chang AR, Ahn SJ, Choi J, Kang KM, Kwon J, Koo T, Kim MY, Choi SH, Jeong BK, Jang BS, Jo IY, Lee H, Kim N, Park HJ, Im JH, Lee SW, Cho Y, Lee SY, Chang JH, Chun J, Lee EM, Kim JS, Shin KH, Kim YB. Assessment of deep learning-based auto-contouring on interobserver consistency in target volume and organs-at-risk delineation for breast cancer: Implications for RTQA program in a multi-institutional study. Breast 2024; 73:103599. [PMID: 37992527 PMCID: PMC10700624 DOI: 10.1016/j.breast.2023.103599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/30/2023] [Accepted: 11/09/2023] [Indexed: 11/24/2023] Open
Abstract
PURPOSE To quantify interobserver variation (IOV) in target volume and organs-at-risk (OAR) contouring across 31 institutions in breast cancer cases and to explore the clinical utility of deep learning (DL)-based auto-contouring in reducing potential IOV. METHODS AND MATERIALS In phase 1, two breast cancer cases were randomly selected and distributed to multiple institutions for contouring six clinical target volumes (CTVs) and eight OAR. In Phase 2, auto-contour sets were generated using a previously published DL Breast segmentation model and were made available for all participants. The difference in IOV of submitted contours in phases 1 and 2 was investigated quantitatively using the Dice similarity coefficient (DSC) and Hausdorff distance (HD). The qualitative analysis involved using contour heat maps to visualize the extent and location of these variations and the required modification. RESULTS Over 800 pairwise comparisons were analysed for each structure in each case. Quantitative phase 2 metrics showed significant improvement in the mean DSC (from 0.69 to 0.77) and HD (from 34.9 to 17.9 mm). Quantitative analysis showed increased interobserver agreement in phase 2, specifically for CTV structures (5-19 %), leading to fewer manual adjustments. Underlying IOV differences causes were reported using a questionnaire and hierarchical clustering analysis based on the volume of CTVs. CONCLUSION DL-based auto-contours improved the contour agreement for OARs and CTVs significantly, both qualitatively and quantitatively, suggesting its potential role in minimizing radiation therapy protocol deviation.
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Affiliation(s)
- Min Seo Choi
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jee Suk Chang
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Kyubo Kim
- Department of Radiation Oncology, Ewha Womans University College of Medicine, Seoul, Republic of Korea; Department of Radiation Oncology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea
| | - Jin Hee Kim
- Department of Radiation Oncology, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea
| | - Tae Hyung Kim
- Department of Radiation Oncology, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul, Republic of Korea
| | - Sungmin Kim
- Department of Radiation Oncology, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Hyejung Cha
- Department of Radiation Oncology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Oyeon Cho
- Department of Radiation Oncology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Jin Hwa Choi
- Department of Radiation Oncology, Chung-Ang University Hospital, Seoul, Republic of Korea
| | - Myungsoo Kim
- Department of Radiation Oncology, Incheon St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Juree Kim
- Department of Radiation Oncology, Ilsan CHA Medical Center, CHA University School of Medicine, Goyang, Republic of Korea
| | - Tae Gyu Kim
- Department of Radiation Oncology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Republic of Korea
| | - Seung-Gu Yeo
- Department of Radiation Oncology, Soonchunhyang University College of Medicine, Soonchunhyang University Hospital, Bucheon, Republic of Korea
| | - Ah Ram Chang
- Department of Radiation Oncology, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - Sung-Ja Ahn
- Department of Radiation Oncology, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Jinhyun Choi
- Department of Radiation Oncology, Jeju National University Hospital, Jeju University College of Medicine, Republic of Korea
| | - Ki Mun Kang
- Gyeongsang National University Changwon Hospital, Gyeongsang National University College of Medicine, Jinju, Republic of Korea
| | - Jeanny Kwon
- Department of Radiation Oncology, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Taeryool Koo
- Department of Radiation Oncology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea
| | - Mi Young Kim
- Department of Radiation Oncology, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea
| | - Seo Hee Choi
- Department of Radiation Oncology, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - Bae Kwon Jeong
- Department of Radiation Oncology, Gyeongsang National University Hospital, Gyeongsang National University College of Medicine, Jinju, Republic of Korea
| | - Bum-Sup Jang
- Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - In Young Jo
- Department of Radiation Oncology, Soonchunhyang University Hospital, Cheonan, Republic of Korea
| | - Hyebin Lee
- Department of Radiation Oncology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Nalee Kim
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Hae Jin Park
- Department of Radiation Oncology, Hanyang University College of Medicine, Seoul, Republic of Korea
| | - Jung Ho Im
- Department of Radiation Oncology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Republic of Korea
| | - Sea-Won Lee
- Department of Radiation Oncology, Eunpyeong St. Mary's Hospital, Catholic University of Korea College of Medicine, Seoul, Republic of Korea
| | - Yeona Cho
- Department of Radiation Oncology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Sun Young Lee
- Department of Radiation Oncology, Chonbuk National University Hospital, Jeonju, Republic of Korea
| | - Ji Hyun Chang
- Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jaehee Chun
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Eung Man Lee
- Department of Radiation Oncology, Ewha Womans University College of Medicine, Seoul, Republic of Korea
| | - Jin Sung Kim
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea.
| | - Kyung Hwan Shin
- Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Yong Bae Kim
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea
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Kim JY, Hong JY, Kim SM, Ryu KH, Kim DS, Lee SH, Na JH, Cho HH, Yu J, Lee J. Socio-economic factors and medical conditions affecting regular stomach cancer screening in Korea: a retrospective longitudinal study using national public health data for 11 years. Public Health 2024; 227:70-77. [PMID: 38128357 DOI: 10.1016/j.puhe.2023.11.029] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 11/03/2023] [Accepted: 11/15/2023] [Indexed: 12/23/2023]
Abstract
OBJECTIVE This study aimed to explore socio-economic factors and medical conditions that affect regular stomach cancer (SC) screening among Korean adults. STUDY DESIGN This was a retrospective observational study. METHODS Study subjects were 5545 adults aged ≥40 years who participated in the 2007-2012 Korean National Health and Nutrition Examination Survey and were followed up to year 2017 based on data linking to the Korean National Health Insurance Service and Korean Health Insurance Review and Assessment. Socio-economic factors included sex, age, residential area, education, occupation, marital status, disability, public and private health insurance, service through local public health organizations, history of cancer except for SC, and family history of SC. Medical factors included six gastric lesions with the possibility of facilitating SC screening, including benign gastric neoplasm, chronic atrophic gastritis, gastric polyp, Helicobacter pylori infection, intestinal metaplasia, and peptic ulcers. The outcome was adherence to SC screening, which was divided into non-adherence, irregular adherence, and regular adherence. RESULTS After adjusting for the effects of socio-economic factors, multivariate ordinal logistic regression revealed that participants with a history of four types of gastric lesions were more likely to regularly participate in SC screening: chronic atrophic gastritis (odds ratio [OR] 1.567; 95% confidence interval [CI] = 1.276-1.923), gastric polyps (OR 1.565; 95% CI = 1.223-2.003), H. pylori infection (OR 1.637; 95% CI = 1.338-2.003), and peptic ulcer (OR 2.226; 95% CI 1.750-2.831). CONCLUSIONS To improve participation in SC screening, it is necessary to implement personalized strategies for individuals at risk for gastric cancer in addition to population-based strategies for vulnerable groups.
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Affiliation(s)
- J-Y Kim
- Department of Biomedical Informatics, College of Medicine, Konyang University, Daejeon, South Korea; Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Konyang University, Daejeon, South Korea
| | - J Y Hong
- Department of Biomedical Informatics, College of Medicine, Konyang University, Daejeon, South Korea
| | - S M Kim
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Konyang University College of Medicine, 158, Gwanjeodong-ro, Seo-gu, Daejeon, South Korea.
| | - K H Ryu
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Konyang University College of Medicine, 158, Gwanjeodong-ro, Seo-gu, Daejeon, South Korea
| | - D S Kim
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Konyang University College of Medicine, 158, Gwanjeodong-ro, Seo-gu, Daejeon, South Korea
| | - S H Lee
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Konyang University College of Medicine, 158, Gwanjeodong-ro, Seo-gu, Daejeon, South Korea
| | - J H Na
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Konyang University College of Medicine, 158, Gwanjeodong-ro, Seo-gu, Daejeon, South Korea
| | - H H Cho
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Konyang University College of Medicine, 158, Gwanjeodong-ro, Seo-gu, Daejeon, South Korea
| | - J Yu
- Medical Data Research group, Konyang University Hospital, Daejeon, South Korea
| | - J Lee
- Medical Data Research group, Konyang University Hospital, Daejeon, South Korea
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10
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Kim S, Qu F, Wang Y, Lam WK. Examining the joint coordination during dynamic balance learning using vector coding and statistical parametric mapping analyses. Sci Rep 2024; 14:1724. [PMID: 38242922 PMCID: PMC10799072 DOI: 10.1038/s41598-023-44216-1] [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: 06/01/2023] [Accepted: 10/05/2023] [Indexed: 01/21/2024] Open
Abstract
We aimed to examine the changes in balance performance, kinematic variables, and joint coordination of the lower extremities during the Y-balance learning task. Twenty female university students completed five consecutive blocks of Y-balance learning from days 3 to 7 (135 trials). Pre-tests and tests were performed on days 1 and 9. Maximum reach distance, peak joint angle, and joint coordination in the anterior (AL), posterolateral (PL), and posteromedial (PM) directions were measured to determine the efficacy of Y-balance performance. A repeated measures ANOVA was performed for the maximum reach distance across learning blocks to confirm whether learning had occurred. Our results indicated that the maximum reach distance on day 5 was longer than that on other learning days. The maximum reach distance significantly increased in the PL and PM directions after learning. The hip flexion (PL/PM), abduction (PM), internal rotation (PM), and external rotation (PL) angles increased after learning. The knee joint flexion angle increased in both AL and PL directions. Only the ankle dorsiflexion angle increased in the AL direction. Joint coordination indicated that the knee and hip joints performed simultaneously during internal rotation. Ankle-knee joint coordination was performed using dorsiflexion and flexion strategies. Statistical parametric mapping analysis indicated significant differences in the ankle sagittal plane in the AL direction, hip horizontal and hip/knee sagittal planes in the PL direction, and hip/knee sagittal and hip frontal/horizontal planes in the PM direction. These data suggest that the dynamic balance ability of the novice participants improved in relation to changes in coordination patterns after learning. The results of this study can be applied to other populations to improve their dynamic balance and prevent fall injuries.
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Affiliation(s)
- Sungmin Kim
- Institute of School Physical Education, Korea National University of Education, Cheongju, Chungbuk, Republic of Korea
| | - Feng Qu
- Biomechanics Laboratory, Beijing Sports University, Beijing, China.
| | - Yi Wang
- Department of Physical Education, Renmin University of China, Beijing, China.
- Sports and Social Development Research Center, Renmin University of China, Beijing, China.
| | - Wing-Kai Lam
- Sports Information and External Affairs Centre, Hong Kong Sports Institutes, Sha Tin, Hong Kong, China
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11
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Lee G, Lee Y, Kim S, Kim D, Park H, Woo M, Song T, Paik U. Oxidation differences on Si- versus C-terminated surfaces of SiC during planarization in the fabrication of high-power, high-frequency semiconductor device. Sci Rep 2023; 13:22847. [PMID: 38129454 PMCID: PMC10739720 DOI: 10.1038/s41598-023-49622-z] [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: 09/12/2023] [Accepted: 12/10/2023] [Indexed: 12/23/2023] Open
Abstract
Silicon carbide (SiC) wafers have attracted attention as a material for advanced power semiconductor device applications due to their high bandgap and stability at high temperatures and voltages. However, the inherent chemical and mechanical stability of SiC poses significant challenges in the chemical mechanical planarization (CMP) process, an essential step in reducing defects and improving surface flatness. SiC exhibits different mechanical and chemical properties depending on SiC terminal faces, affecting SiC oxidation behavior during the CMP process. Here, we investigate the process of oxide layer formation during the CMP process and how it relates to the SiC terminal faces. The results show that under the same conditions, the C-terminated face (C-face) exhibits higher oxidation reaction kinetics than the Si-terminated face (Si-face), forming an oxide layer of finer particles. Due to the different oxidation kinetic tendencies, the oxide layer formed on the C-face has a higher friction coefficient and more defects than the oxide layer formed on the Si-face. This results in a higher removal rate during CMP for the C-face than the Si-face. Furthermore, by controlling the physicochemical properties of the oxide film, high removal rates can be achieved by friction with the pad alone, without the need for nanoparticle abrasives.
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Affiliation(s)
- Ganggyu Lee
- Department of Energy Engineering, Hanyang University, Seoul, Republic of Korea
| | - Yeram Lee
- Department of Energy Engineering, Hanyang University, Seoul, Republic of Korea
| | - Sungmin Kim
- Department of Energy Engineering, Hanyang University, Seoul, Republic of Korea
| | - Donghwan Kim
- Department of Energy Engineering, Hanyang University, Seoul, Republic of Korea
| | - Hongjun Park
- Department of Energy Engineering, Hanyang University, Seoul, Republic of Korea
| | - Myungju Woo
- Department of Energy Engineering, Hanyang University, Seoul, Republic of Korea
| | - Taeseup Song
- Department of Energy Engineering, Hanyang University, Seoul, Republic of Korea.
| | - Ungyu Paik
- Department of Energy Engineering, Hanyang University, Seoul, Republic of Korea.
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12
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Kim S, Han S, Kim S, Moon J. The effects of knee ligament load using simulated hip abductor and hamstring muscle strengthening during cutting maneuver. Medicine (Baltimore) 2023; 102:e35742. [PMID: 37986289 PMCID: PMC10659627 DOI: 10.1097/md.0000000000035742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/03/2023] [Accepted: 09/29/2023] [Indexed: 11/22/2023] Open
Abstract
BACKGROUND This study aimed to analyze knee ligament of load and joint moment to simulate the strengthening of the hip abductor and hamstring muscles using musculoskeletal modeling, thereby contributing to decrease of knee ligament load. METHODS Forty participants (age: 21.85 ± 1.90 years; height: 1.76 ± 0.06 m; body mass: 68.5 ± 7.06 kg) were instructed to run at 4.5 ± 0.2 m/s from a 5 m distance posterior to the force plate, land their feet on the force plate, and perform the cutting maneuver on the left. In the musculoskeletal modeling, the hip abductor and hamstring muscles were targeted to construct a model with a 30% increase in the contraction force of the hip abductor, hamstring, and both 2 muscles. The variables were the ligament force and knee joint moment. One-way repeated measure ANOVA and Bonferroni test were used to compare the abductor/hamstring, abductor, hamstring and control models. RESULTS There were significant differences in anterior bundle of the anterior cruciate ligament (ACL) (P = .001), inferior bundle of the superficial layer of the medial collateral ligament (MCL) (P = .016), and posterior bundle of the superficial layer of the MCL (P = .022) force. The post hoc showed that the hamstring model had lower anterior bundle of the ACL and inferior bundle of the superficial layer of the MCL than the abductor/hamstring and abductor models (P < .05) and lower posterior bundle of the superficial layer of the MCL than the abductor and control models (P < .05). There was a significant difference in the adduction (P = .028) and internal rotation moments (P = .014). The post hoc showed that both moments were lower in the hamstring model than in the other models (P < .05). CONCLUSIONS The hamstring strengthening may contribute significantly to preventing ACL or MCL injury by reducing knee ligament load.
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Affiliation(s)
- Sungmin Kim
- Institute of School Physical Education, Korea National University of Education, Chungbuk, Republic of Korea
| | - Sanghyuk Han
- Human Performance Laboratory, Descente Innovation Studio Complex, Busan, Republic of Korea
| | - Seongyong Kim
- Futures R&D Center, SSG LANDERS, Incheon, Republic of Korea
| | - Jeheon Moon
- Department of Physical Education, Korea National University of Education, Chungbuk, Republic of Korea
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Kim S, Seon JK, Ko B, Lim JH, Song WC, Kang GR, Shin Y, Jung ST. Outcome Prediction Model Following Proximal Femoral Osteotomy in Legg-Calvé-Perthes Disease Using Machine Learning Algorithms. J Pediatr Orthop 2023; 43:632-639. [PMID: 37728109 DOI: 10.1097/bpo.0000000000002494] [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: 09/21/2023]
Abstract
BACKGROUND The purpose of the current study was (1) to analyze various factors that may be associated with the outcomes of Legg-Calvé-Perthes disease (LCPD), and (2) to develop and internally validate machine learning algorithms capable of providing patient-specific predictions of which patients with LCPD will achieve relevant improvement in radiologic outcomes after proximal femoral varus osteotomy (PFVO). We examined several variables, previously identified as factors, that may influence the outcome of LCPD and developed a machine learning algorithm based on them. METHODS In this retrospective study, we analyzed patients aged older than 6 years at the time of LCPD diagnosis who underwent PFVO at our institution between 1979 and 2015. Univariate and multivariate logistic regression analyses were used to examine the effects of variables on the sphericity of the femoral head at skeletal maturity, including age at onset, sex, stage at operation, extent of epiphyseal involvement and collapse, presence of specific epiphyseal, metaphyseal, and acetabular changes, and postoperative neck shaft angle (NSA). Recursive feature selection was used to identify the combination of variables from an initial pool of 13 features that optimized the model performance. Five machine learning algorithms [extreme gradient boosting (XGBoost), multilayer perception, support vector machine, elastic-net penalized logistic regression, and random forest) were trained using 5-fold cross-validation 3 times and applied to an independent testing set of patients. RESULTS Ninety patients with LCPD who underwent PFVO were included in this study. The mean age at diagnosis was 7.93 (range, 6.0 to 12.33) years. The average follow-up period was 10.11 (range, 5.25 to 22.92) years. A combination of 8 variables, optimized algorithm performance, and specific cutoffs were found to decrease the likelihood of achieving the 1 or 2 Stulberg classification: age at onset ≤ 8.06, lateral classification ≤ B, 12.40 < preoperative migration percentage (MP) ≤ 22.85, Catterall classification ≤ 2, 117.4 < postoperative NSA ≤ 122.90, -10.8 < postoperative MP ≤ 6.5, 139.65 < preoperative NSA ≤ 144.67, and operation at stage 1. The XGBoost model demonstrated the best performance (F1 score: 0.78; area under the curve: 0.84). CONCLUSIONS The XGBoost machine learning algorithm achieved the best performance in predicting the postoperative radiologic outcomes in patients with LCPD who underwent PFVO. In our population, age at onset ≤ 8.06, lateral classification ≤ B, 12.40 < preoperative MP ≤ 22.85, Catterall classification ≤ 2, 117.4 < postoperative NSA ≤ 122.90, -10.8 < postoperative MP ≤ 6.5, 139.65 < preoperative NSA ≤ 144.67, and operation at an early stage had the likelihood of achieving the spherical femoral head for the patients with LCPD that underwent PFVO. After external validation, the online application of this model may enhance shared decision-making. LEVEL OF EVIDENCE Level III-retrospective cohort study.
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Affiliation(s)
- Sungmin Kim
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital
| | - Jong-Keun Seon
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital, Hwasun-eup, Hwasun-gun, Jeollanam-do, Korea
| | - Bonggyun Ko
- Department of Mathematics and Statistics, Chonnam National University, Gwangju
| | - Jun-Hyuk Lim
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital
| | - Woo-Chan Song
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital
| | - Gyo Rim Kang
- Department of Orthopedic Surgery, Chonnam National University Hospital, Donggu
| | - Yonggwan Shin
- Department of Mathematics and Statistics, Chonnam National University, Gwangju
| | - Sung-Taek Jung
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital
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14
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Sha L, Yang Z, An S, Yang W, Kim S, Oh H, Xu J, Yin J, Wang H, Lenz HJ, An W, Cho US, Dou Y. Non-canonical MLL1 activity regulates centromeric phase separation and genome stability. Nat Cell Biol 2023; 25:1637-1649. [PMID: 37945831 DOI: 10.1038/s41556-023-01270-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 09/26/2023] [Indexed: 11/12/2023]
Abstract
Epigenetic dysregulation is a prominent feature in cancer, as exemplified by frequent mutations in chromatin regulators, including the MLL/KMT2 family of histone methyltransferases. Although MLL1/KMT2A activity on H3K4 methylation is well documented, their non-canonical activities remain mostly unexplored. Here we show that MLL1/KMT2A methylates Borealin K143 in the intrinsically disordered region essential for liquid-liquid phase separation of the chromosome passenger complex (CPC). The co-crystal structure highlights the distinct binding mode of the MLL1 SET domain with Borealin K143. Inhibiting MLL1 activity or mutating Borealin K143 to arginine perturbs CPC phase separation, reduces Aurora kinase B activity, and impairs the resolution of erroneous kinetochore-microtubule attachments and sister-chromatid cohesion. They significantly increase chromosome instability and aneuploidy in a subset of hepatocellular carcinoma, resulting in growth inhibition. These results demonstrate a non-redundant function of MLL1 in regulating inner centromere liquid condensates and genome stability via a non-canonical enzymatic activity.
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Affiliation(s)
- Liang Sha
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Zi Yang
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Sojin An
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Wentao Yang
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Sungmin Kim
- Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Hoon Oh
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jing Xu
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jun Yin
- Clinical and Translational Research, CARIS Life Sciences, Phoenix, AZ, USA
| | - He Wang
- Novartis Institutes for BioMedical Research, Cambridge, MA, USA
| | - Heinz-Josef Lenz
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Woojin An
- Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Uhn-Soo Cho
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Yali Dou
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
- Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, USA.
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15
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Hwang S, Lee S, Yoon B, Jeong B, Kim J, Kim S, Kim J. GaN-Based 4-MHz Full-Bridge Electrosurgical Generator Using Zero-Voltage Switching Over Wide Load Impedance Range. IEEE Trans Biomed Circuits Syst 2023; 17:1125-1134. [PMID: 37651483 DOI: 10.1109/tbcas.2023.3310880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
In this article, a 4-MHz full-bridge inverter system for an electrosurgical generator (ESG) is presented with zero-voltage switching (ZVS) turn-on over a wide load impedance range based on wideband gap material gallium nitride (GaN) technology. The proposed resonant circuit is used for impedance matching and limits the current when the load is short state while performing ZVS over a wide load impedance range. It also ensures high power performance at high frequencies for electric surgery. The implementation methods of the GaN switch at 4 MHz with high output performance are guided by the low inductance from the gate-driver output to the switch gate node and the effective heating management structure of the GaN-based inverter. The proposed generator achieved a maximum output power of 99 W to the load and a maximum overall efficiency of 89% with overcurrent of <3 A at short state of the load. The ESG can generate constant output power of 20, 50, 70 W through mode control of 2, 5, and 7 s. The overcurrent Moreover, the proposed generator is tested on porcine tissue samples to verify its effectiveness as an ESG.
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16
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Pyo JH, Lee SY, Lee IJ, Kim SM, Kim JW. Beneficial Role of Multi-Disciplinary Treatment for Anaplastic Thyroid Cancer with Initial Distant Metastasis. Int J Radiat Oncol Biol Phys 2023; 117:e616-e617. [PMID: 37785850 DOI: 10.1016/j.ijrobp.2023.06.1996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Anaplastic thyroid cancer (ATC) is a rare, highly aggressive tumor, with median survival around 5 months. Approximately half of the ATC patients presents with distant metastases at diagnosis, showing even more devastating prognosis, yet no outcome analysis had been reported. In this study, we aim to evaluate the clinical outcome of M1 ATC patients, and to define the group of patients who would benefit from local treatment based on multi-disciplinary approach. MATERIALS/METHODS A total of 133 histology-confirmed ATC patients underwent protocol-based multidisciplinary treatment including surgery and chemoradiotherapy (CRT) between May 2016 and January 2022. Patients received intensity-modulated radiotherapy of 30 fractions concurrently with paclitaxel on days 1, 8 and 15 every 4 weeks, and lenvatinib was added upon progression. After 18 fractions of CRT, interim response analysis using modified RECIST was conducted for adaptive treatment planning. We reviewed 58 patients with distant metastasis at diagnosis (stage IVC). Overall survival (OS) and progression-free survival (PFS) were measured from the day of diagnosis. RESULTS Most common metastatic site was lung (91.4%), followed by bone (31.0%) and brain (5.2%). Lenvatinib was added for 35 patients after any sign of progression. Fourteen patients received upfront surgery (16 debulking and 5 total) followed by adjuvant CRT in 16 patients. Thirty-one patients received upfront CRT with 2 patients receiving total resection after sufficient down-staging. Six (10%) patients could not complete radiotherapy but continued receiving systemic treatment. The median follow-up was 5.9 months. The median and 1-year OS were 6.2 months and 20.5%, and PFS were 3.7 months and 3.5%. Total RT dose over 60 Gy significantly improved median OS (7.5 vs 4.1 months, p = 0.012) and median PFS (4.4 vs 3.0, p = 0.010). Patients with less than 10 initial metastatic tumors showed better median OS (9.1 vs 4.6 months, p = 0.002) but not PFS (5.1 vs 3.6, p = 0.485). At interim analysis, early response (CR, PR and SD) of primary tumor was not associated with survival, while progression of distant metastases showed significantly worse median OS (9.8 vs 4.6 months, p = 0.001). More than 10 metastatic tumors (HR 2.73, 95% CI 1.32-5.66) and stable metastasis at interim analysis (HR 2.39, 95% CI 1.04-5.48) remained as significant factor in the multivariable cox regression analysis. Median OS and PFS of patients with less than 10 metastases showing no progression at interim analysis were 9.1 months, and 5.1 months. CONCLUSION Local treatment combined with chemotherapy for M1 ATC patients showed outcome comparable to those of non-metastatic ATC results. Active local treatment should be considered especially for patients with less than 10 metastases, and patients without distant progression in early response evaluation.
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Affiliation(s)
- J H Pyo
- Department of Radiation Oncology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - S Y Lee
- Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - I J Lee
- Department of Radiation Oncology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - S M Kim
- Department of Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - J W Kim
- Department of Radiation Oncology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
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Kim S, Lee MS, Camaioni DM, Gutiérrez OY, Glezakou VA, Govind N, Huthwelker T, Zhao R, Rousseau R, Fulton JL, Lercher JA. Self-Organization of 1-Propanol at H-ZSM-5 Brønsted Acid Sites. JACS Au 2023; 3:2487-2497. [PMID: 37772176 PMCID: PMC10523365 DOI: 10.1021/jacsau.3c00259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 08/03/2023] [Accepted: 08/18/2023] [Indexed: 09/30/2023]
Abstract
In situ Al K-edge X-ray absorption near edge structure (XANES) and Extended X-ray absorption fine structure (EXAFS) spectroscopy in conjunction with ab initio molecular dynamics (AIMD) simulations show that adsorption of 1-propanol alters the structure of the Brønsted acid site through changes in the associated aluminum-oxygen tetrahedron in zeolite H-MFI. The decreasing intensity of the pre-edge signal of the in situ Al K-edge XANES spectra with increasing 1-propanol coverage shows that Al T-sites become more symmetric as the sorbed alcohol molecules form monomers, dimers, and trimers. The adsorption of monomeric 1-propanol on Brønsted acid sites reduces the distortion of the associated Al T-site, shortens the Al-O distance, and causes the formation of a Zundel-like structure. With dimeric and trimeric alcohol clusters, the zeolite proton is fully transferred to the alcohols and the aluminum-oxygen tetrahedron becomes fully symmetric. The subtle changes in Al-K-edge XANES in the presence of sorbate structures, with the use of theory, are used to probe the local zeolite structures and provide a basis to predict the population and chemical state of the sorbed species.
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Affiliation(s)
- Sungmin Kim
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Mal-Soon Lee
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Donald M. Camaioni
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Oliver Y. Gutiérrez
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Vassiliki-Alexandra Glezakou
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Niranjan Govind
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Thomas Huthwelker
- Swiss
Light Source, Paul Scherrer Institut (PSI), 5232 Villigen, Switzerland
| | - Ruixue Zhao
- Department
of Chemistry and Catalysis Research Institute, TU München, Lichtenbergstrasse 4, 85748 Garching, Germany
| | - Roger Rousseau
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - John L. Fulton
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Johannes A. Lercher
- Institute
for Integrated Catalysis and Physical Science Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Department
of Chemistry and Catalysis Research Institute, TU München, Lichtenbergstrasse 4, 85748 Garching, Germany
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18
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Shin Y, Kim S, Liang G, Ulmer TS, An W. VprBP/DCAF1 Triggers Melanomagenic Gene Silencing through Histone H2A Phosphorylation. Biomedicines 2023; 11:2552. [PMID: 37760992 PMCID: PMC10526264 DOI: 10.3390/biomedicines11092552] [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: 08/02/2023] [Revised: 09/10/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
Vpr binding protein (VprBP), also known as DDB1- and CUL4-associated factor1 (DCAF1), is a recently identified atypical kinase and plays an important role in downregulating the transcription of tumor suppressor genes as well as increasing the risk for colon and prostate cancers. Melanoma is the most aggressive form of skin cancer arising from pigment-producing melanocytes and is often associated with the dysregulation of epigenetic factors targeting histones. Here, we demonstrate that VprBP is highly expressed and phosphorylates threonine 120 (T120) on histone H2A to drive the transcriptional inactivation of growth-regulatory genes in melanoma cells. As is the case for its epigenetic function in other types of cancers, VprBP acts to induce a gene silencing program dependent on H2AT120 phosphorylation (H2AT120p). The significance of VprBP-mediated H2AT120p is further underscored by the fact that VprBP knockdown- or VprBP inhibitor-induced lockage of H2AT120p mitigates melanoma tumor growth in xenograft models. Collectively, our results establish VprBP-mediated H2AT120p as a key epigenetic signal for melanomagenesis and suggest the therapeutic potential of targeting VprBP kinase activity for effective melanoma treatment.
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Affiliation(s)
- Yonghwan Shin
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA 90033, USA; (Y.S.); (S.K.)
| | - Sungmin Kim
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA 90033, USA; (Y.S.); (S.K.)
| | - Gangning Liang
- Department of Urology, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA 90089, USA;
| | - Tobias S. Ulmer
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, CA 90033, USA;
| | - Woojin An
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA 90033, USA; (Y.S.); (S.K.)
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Kim D, Kim N, Lee Y, Kim S, Kwon J. Sound stimulation using the individual's heart rate to improve the stability and homeostasis of the autonomic nervous system. Physiol Rep 2023; 11:e15816. [PMID: 37726255 PMCID: PMC10509153 DOI: 10.14814/phy2.15816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 08/23/2023] [Accepted: 08/24/2023] [Indexed: 09/21/2023] Open
Abstract
OBJECTIVES In this study, we explain the role of enhancing the stability and homeostasis of the autonomic nervous system (ANS) by proposing the average heart rate sound resonance (aHRSR), a sound stimulation to prevent imbalance of ANS due to dynamic movement. The effect of aHRSR on ANS was analyzed through the time and frequency domain of heart rate variability (HRV) using the photoplethysmogram data (PPG) of 22 participants (DUIRB-202109-12). METHOD When the subjects performed dynamic movements that could cause changes in the ANS, HRV indicators using PPG data for 5 min before and after the movements were analyzed according to the presence or absence of aHRSR. The standard deviation of the NN intervals (SDNN), the square root of the mean squared differences of the NN intervals (RMSSD), low-frequency band (LF), and high-frequency band (HF), which represent sympathetic and parasympathetic nerve activity, were used as indicators, where SNDD and LF represent total ANS and sympathetic activity, while RMSSD and HF represent parasympathetic activity. RESULTS As the effects of aHRSR on dynamic movement, the recovery time of RR interval was advanced by about 15 s, SDNN increased from ([44.16 ± 13.11] to [47.85 ± 15.16]) ms, and RMSSD increased from ([23.73 ± 9.95] to [31.89 ± 12.48]) ms (p < 0.05), increasing the stability of the ANS and reducing instability. The effect of homeostasis of the ANS according to aHRSR is also shown in reducing the change rate of LF from (-13.83 to -8.83) %, and the rate of change of HF from (10.59 to 3.27) %. CONCLUSIONS These results suggest that aHRSR can affect the cardiovascular system by assisting physiological movements that occur during dynamic movement.
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Affiliation(s)
- Daechang Kim
- Department of Medical BiotechnologyDongguk UniversityGyeonggi‐doKorea
| | - Nahyeon Kim
- Department of Medical BiotechnologyDongguk UniversityGyeonggi‐doKorea
| | - Younju Lee
- Department of Medical BiotechnologyDongguk UniversityGyeonggi‐doKorea
| | - Sungmin Kim
- Department of Medical BiotechnologyDongguk UniversityGyeonggi‐doKorea
| | - Jiyean Kwon
- Department of Medical Device and HealthcareDongguk UniversitySeoulKorea
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20
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Kim IS, Kim S, Yoo TH, Kim JK. Diagnosis and treatment of hypertension in dialysis patients: a systematic review. Clin Hypertens 2023; 29:24. [PMID: 37653470 PMCID: PMC10472689 DOI: 10.1186/s40885-023-00240-x] [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: 10/22/2022] [Accepted: 05/24/2023] [Indexed: 09/02/2023] Open
Abstract
In patients with end-stage renal disease (ESRD) undergoing dialysis, hypertension is common but often inadequately controlled. The prevalence of hypertension varies widely among studies because of differences in the definition of hypertension and the methods of used to measure blood pressure (BP), i.e., peri-dialysis or ambulatory BP monitoring (ABPM). Recently, ABPM has become the gold standard for diagnosing hypertension in dialysis patients. Home BP monitoring can also be a good alternative to ABPM, emphasizing BP measurement outside the hemodialysis (HD) unit. One thing for sure is pre- and post-dialysis BP measurements should not be used alone to diagnose and manage hypertension in dialysis patients. The exact target of BP and the relationship between BP and all-cause mortality or cause-specific mortality are unclear in this population. Many observational studies with HD cohorts have almost universally reported a U-shaped or even an L-shaped association between BP and all-cause mortality, but most of these data are based on the BP measured in HD units. Some data with ABPM have shown a linear association between BP and mortality even in HD patients, similar to the general population. Supporting this, the results of meta-analysis have shown a clear benefit of BP reduction in HD patients. Therefore, further research is needed to determine the optimal target BP in the dialysis population, and for now, an individualized approach is appropriate, with particular emphasis on avoiding excessively low BP. Maintaining euvolemia is of paramount importance for BP control in dialysis patients. Patient heterogeneity and the lack of comparative evidence preclude the recommendation of one class of medication over another for all patients. Recently, however, β-blockers could be considered as a first-line therapy in dialysis patients, as they can reduce sympathetic overactivity and left ventricular hypertrophy, which contribute to the high incidence of arrhythmias and sudden cardiac death. Several studies with mineralocorticoid receptor antagonists have also reported promising results in reducing mortality in dialysis patients. However, safety issues such as hyperkalemia or hypotension should be further evaluated before their use.
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Affiliation(s)
- In Soo Kim
- Department of Internal Medicine & Kidney Research Institute, Hallym University Sacred Heart Hospital, Pyungan-dong, Dongan-gu, Anyang, 431-070, Korea
| | - Sungmin Kim
- Department of Internal Medicine & Kidney Research Institute, Hallym University Sacred Heart Hospital, Pyungan-dong, Dongan-gu, Anyang, 431-070, Korea
| | - Tae-Hyun Yoo
- Department of Internal Medicine, College of Medicine, Institute of Kidney Disease Research, Yonsei University, Seoul, Korea
| | - Jwa-Kyung Kim
- Department of Internal Medicine & Kidney Research Institute, Hallym University Sacred Heart Hospital, Pyungan-dong, Dongan-gu, Anyang, 431-070, Korea.
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Kim S, Yoon J, Kym D, Hur J, Kim M, Park J, Cho YS, Chun W, Yoon D. Evaluating clinical heterogeneity and predicting mortality in severely burned patients through unsupervised clustering and latent class analysis. Sci Rep 2023; 13:13600. [PMID: 37604951 PMCID: PMC10442401 DOI: 10.1038/s41598-023-40927-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 08/18/2023] [Indexed: 08/23/2023] Open
Abstract
Burn injuries often result in a high level of clinical heterogeneity and poor prognosis in patients with severe burns. Clustering algorithms, which are unsupervised methods that can identify groups with similar trajectories in patients with heterogeneous diseases, can provide insights into the mechanisms of the disease pathogenesis. This study aimed to analyze routinely collected biomarkers to understand their mortality prediction power, identify the clinical meanings or subtypes, and inform treatment decisions to improve the outcomes of patients with burns. This retrospective cohort study included patients aged ≥ 18 years who were admitted between January 2010 and December 2021. The patients were divided into four subgroups based on the time period of their admission: week 1, 2, 3, and 4. The study revealed that 22 biomarkers were evaluated, and the red blood cell distribution width, bicarbonate level, pH, platelets, and lymphocytes were significantly associated with the mortality risk. Latent class analysis further demonstrated that the pH, platelets, lymphocytes, lactate, and albumin demonstrated the lowest levels in the cluster with the highest risk of mortality, with the lowest levels of pH and lactate being particularly noteworthy in week 1 of the study. During the week 2, the pH and lymphocyte levels were demonstrated to be significant predictors of the mortality risk, whereas the lymphocyte and platelet counts were meaningful predictors in week 3. During week 4, pH, platelet count, and albumin level were important predictors of mortality risk. Analysis of routinely collected biomarkers using clustering algorithms and latent class analysis can provide valuable insights into the heterogeneity of burn injuries and improve the ability to predict disease progression and mortality. Our findings suggest that lactate levels are a better indicator of cellular hypoxia in the early stages of burn shock, whereas platelet and lymphocyte levels are more indicative of infections such as sepsis. Albumin levels are considered a better indicator of reduced nutritional loss with decrease in unhealed burn wounds; however, the pH levels reflect the overall condition of the patient throughout the study period. These findings can be used to inform treatment decisions and improve the outcomes of burn patients.
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Affiliation(s)
- Sungmin Kim
- Department of Surgery and Critical Care, Burn Center, Hangang Sacred Heart Hospital, Hallym University Medical Center, College of Medicine, Hallym University, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea
| | - Jaechul Yoon
- Department of Surgery and Critical Care, Burn Center, Hangang Sacred Heart Hospital, Hallym University Medical Center, College of Medicine, Hallym University, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea
| | - Dohern Kym
- Department of Surgery and Critical Care, Burn Center, Hangang Sacred Heart Hospital, Hallym University Medical Center, College of Medicine, Hallym University, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea.
- Burn Institutes, Hangang Sacred Heart Hospital, Hallym University Medical Center, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea.
| | - Jun Hur
- Department of Surgery and Critical Care, Burn Center, Hangang Sacred Heart Hospital, Hallym University Medical Center, College of Medicine, Hallym University, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea
- Burn Institutes, Hangang Sacred Heart Hospital, Hallym University Medical Center, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea
| | - Myongjin Kim
- Department of Surgery and Critical Care, Burn Center, Hangang Sacred Heart Hospital, Hallym University Medical Center, College of Medicine, Hallym University, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea
| | - Jongsoo Park
- Department of Surgery and Critical Care, Burn Center, Hangang Sacred Heart Hospital, Hallym University Medical Center, College of Medicine, Hallym University, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea
| | - Yong Suk Cho
- Department of Surgery and Critical Care, Burn Center, Hangang Sacred Heart Hospital, Hallym University Medical Center, College of Medicine, Hallym University, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea
| | - Wook Chun
- Department of Surgery and Critical Care, Burn Center, Hangang Sacred Heart Hospital, Hallym University Medical Center, College of Medicine, Hallym University, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea
- Burn Institutes, Hangang Sacred Heart Hospital, Hallym University Medical Center, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea
| | - Dogeon Yoon
- Burn Institutes, Hangang Sacred Heart Hospital, Hallym University Medical Center, 12, Beodeunaru-ro 7-gil, Youngdeungpo-gu, Seoul, 07247, Korea
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22
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Shin Y, Kim S, Liang G, Ulmer TS, An W. VprBP/DCAF1 triggers melanomagenic gene silencing through histone H2A phosphorylation. Res Sq 2023:rs.3.rs-3147199. [PMID: 37502858 PMCID: PMC10371079 DOI: 10.21203/rs.3.rs-3147199/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Background Melanoma is the most aggressive form of skin cancer arising from pigment-producing melanocytes and is often associated with dysregulation of epigenetic factors targeting histones. VprBP, also known as DCAF1, is a recently identified kinase and plays an important role in downregulating the transcription of tumor suppressor genes as well as increasing the risk for colon and prostate cancers. However, it remains unknown whether VprBP is also involved in triggering the pathogenesis of other types of cancer. Results We demonstrate that VprBP is highly expressed and phosphorylates threonine 120 (T120) on histone H2A to drive transcriptional inactivation of growth regulatory genes in melanoma cells. As is the case for its epigenetic function in colon and prostate cancers, VprBP acts to induce gene silencing program dependently of H2AT120 phosphorylation (H2AT120p). The significance of VprBP-mediated H2AT120p is further underscored by the fact that VprBP knockdown- or VprBP inhibitor-induced lockage of H2AT120p mitigates melanoma tumor growth in xenograft models. Moreover, artificial tethering of VprBP wild type, but not VprBP kinase-dead mutant, to its responsive genes is sufficient for achieving an inactive transcriptional state in VprBP-depleted cells, indicating that VprBP drives gene silencing program in an H2AT120p-dependent manner. Conclusions Our results establish VprBP-mediated H2AT120p as a key epigenetic signal for melanomagenesis and suggest the therapeutic potential of targeting VprBP kinase activity for effective melanoma treatment.
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23
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Shin Y, Kim S, Liang G, Ulmer TS, An W. VprBP/DCAF1 triggers melanomagenic gene silencing through histone H2A phosphorylation. Res Sq 2023:rs.3.rs-2950076. [PMID: 37293029 PMCID: PMC10246234 DOI: 10.21203/rs.3.rs-2950076/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Background Melanoma is the most aggressive form of skin cancer arising from pigment-producing melanocytes and is often associated with dysregulation of epigenetic factors targeting histones. VprBP, also known as DCAF1, is a recently identified kinase and plays an important role in downregulating the transcription of tumor suppressor genes as well as increasing the risk for colon and prostate cancers. However, it remains unknown whether VprBP is also involved in triggering the pathogenesis of other types of cancer. Results We demonstrate that VprBP is highly expressed and phosphorylates threonine 120 (T120) on histone H2A to drive transcriptional inactivation of growth regulatory genes in melanoma cells. As is the case for its epigenetic function in colon and prostate cancers, VprBP acts to induce gene silencing program dependently of H2AT120 phosphorylation (H2AT120p). The significance of VprBP-mediated H2AT120p is further underscored by the fact that VprBP knockdown- or VprBP inhibitor-induced lockage of H2AT120p mitigates melanoma tumor growth in xenograft models. Moreover, artificial tethering of VprBP wild type, but not VprBP kinase-dead mutant, to its responsive genes is sufficient for achieving an inactive transcriptional state in VprBP-depleted cells, indicating that VprBP drives gene silencing program in an H2AT120p-dependent manner. Conclusions Our results establish VprBP-mediated H2AT120p as a key epigenetic signal for melanomagenesis and suggest the therapeutic potential of targeting VprBP kinase activity for effective melanoma treatment.
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24
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Lim JH, Jung ST, Cheon JH, Kim S. Treatment of bilateral congenital extensor tendon dislocation on multiple digits with only one sagittal band reconstruction: a case report. Front Pediatr 2023; 11:1078459. [PMID: 37425263 PMCID: PMC10326519 DOI: 10.3389/fped.2023.1078459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 06/02/2023] [Indexed: 07/11/2023] Open
Abstract
Bilateral congenital dislocation of the extensor tendon in the metacarpophalangeal joint is an exceedingly rare disease and often involves multiple fingers. Surgical treatment of multiple congenital extensor tendon dislocations in both hands has been reported; however, no report has clearly stated whether all fingers should be surgically treated in patients with multiple finger involvement. We report a case in which we successfully treated bilateral congenital extensor tendon dislocation on multiple digits with only one single-loop reconstruction of the sagittal band instead of operating on all involved fingers.
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25
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Nguyen HP, Lee HJ, Kim S. Feasibility study for the automatic surgical planning method based on statistical model. J Orthop Surg Res 2023; 18:398. [PMID: 37264435 DOI: 10.1186/s13018-023-03870-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 05/21/2023] [Indexed: 06/03/2023] Open
Abstract
PURPOSE In this study, we proposed establishing an automatic computer-assisted surgical planning approach based on average population models. METHODS We built the average population models from humerus datasets using the Advanced Normalization Toolkits (ANTs) and Shapeworks. Experiments include (1) evaluation of the average population models before surgical planning and (2) validation of the average population models in the context of predicting clinical landmarks on the humerus from the new dataset that was not involved in the process of building the average population model. The evaluation experiment consists of explained variation and distance model. The validation experiment calculated the root-mean-square error (RMSE) between the expert-determined clinical ground truths and the landmarks transferred from the average population model to the new dataset. The evaluation results and validation results when using the templates built from ANTs were compared to when using the mean shape generated from Shapeworks. RESULTS The average population models predicted clinical locations on the new dataset with acceptable errors when compared to the ground truth determined by an expert. However, the templates built from ANTs present better accuracy in landmark prediction when compared to the mean shape built from the Shapeworks. CONCLUSION The average population model could be utilized to assist anatomical landmarks checking automatically and following surgical decisions for new patients who are not involved in the dataset used to generate the average population model.
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Affiliation(s)
- Hang Phuong Nguyen
- Department of Electrical, Electronic, and Computer Engineering, University of Ulsan, Ulsan, Korea
| | - Hyun-Joo Lee
- Department of Orthopaedic Surgery, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, Korea
| | - Sungmin Kim
- Department of Electrical, Electronic, and Computer Engineering, University of Ulsan, Ulsan, Korea.
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26
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Ghate NB, Kim S, Shin Y, Kim J, Doche M, Valena S, Situ A, Kim S, Rhie SK, Lenz HJ, Ulmer TS, Mumenthaler SM, An W. Phosphorylation and stabilization of EZH2 by DCAF1/VprBP trigger aberrant gene silencing in colon cancer. Nat Commun 2023; 14:2140. [PMID: 37069142 PMCID: PMC10110550 DOI: 10.1038/s41467-023-37883-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 04/04/2023] [Indexed: 04/19/2023] Open
Abstract
Our recent work has shown that DCAF1 (also known as VprBP) is overexpressed in colon cancer and phosphorylates histone H2AT120 to drive epigenetic gene inactivation and oncogenic transformation. We have extended these observations by investigating whether DCAF1 also phosphorylates non-histone proteins as an additional mechanism linking its kinase activity to colon cancer development. We now demonstrate that DCAF1 phosphorylates EZH2 at T367 to augment its nuclear stabilization and enzymatic activity in colon cancer cells. Consistent with this mechanistic role, DCAF1-mediated EZH2 phosphorylation leads to elevated levels of H3K27me3 and altered expression of growth regulatory genes in cancer cells. Furthermore, our preclinical studies using organoid and xenograft models revealed that EZH2 requires phosphorylation for its oncogenic function, which may have therapeutic implications for gene reactivation in colon cancer cells. Together, our data define a mechanism underlying DCAF1-driven colonic tumorigenesis by linking DCAF1-mediated EZH2 phosphorylation to EZH2 stability that is crucial for establishing H3K27me3 and gene silencing program.
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Affiliation(s)
- Nikhil B Ghate
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Sungmin Kim
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Yonghwan Shin
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Jinman Kim
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Michael Doche
- Lawrence J. Ellison Institute for Transformative Medicine, University of Southern California, Los Angeles, CA, 90064, USA
| | - Scott Valena
- Lawrence J. Ellison Institute for Transformative Medicine, University of Southern California, Los Angeles, CA, 90064, USA
| | - Alan Situ
- Department of Biochemistry and Molecular Medicine, Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, CA, 90033, USA
| | - Sangnam Kim
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Suhn K Rhie
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Heinz-Josef Lenz
- Division of Medical Oncology, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Tobias S Ulmer
- Department of Biochemistry and Molecular Medicine, Zilkha Neurogenetic Institute, University of Southern California, Los Angeles, CA, 90033, USA
| | - Shannon M Mumenthaler
- Lawrence J. Ellison Institute for Transformative Medicine, University of Southern California, Los Angeles, CA, 90064, USA
| | - Woojin An
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA.
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27
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Ghate NB, Kim S, Mehmood R, Shin Y, Kim K, An W. VprBP/DCAF1 regulates p53 function and stability through site-specific phosphorylation. Oncogene 2023; 42:1405-1416. [PMID: 37041410 PMCID: PMC10121470 DOI: 10.1038/s41388-023-02685-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 03/21/2023] [Accepted: 03/24/2023] [Indexed: 04/13/2023]
Abstract
VprBP (also known as DCAF1) is a recently identified kinase that is overexpressed in cancer cells and serves as a major determinant for epigenetic gene silencing and tumorigenesis. The role of VprBP in driving target gene inactivation has been largely attributed to its ability to mediate histone H2A phosphorylation. However, whether VprBP also phosphorylates non-histone proteins and whether these phosphorylation events drive oncogenic signaling pathways have not been explored. Here we report that serine 367 phosphorylation (S367p) of p53 by VprBP is a key player in attenuating p53 transcriptional and growth suppressive activities. VprBP catalyzes p53S367p through a direct interaction with the C-terminal domain of p53. Mechanistically, VprBP-mediated S367p inhibits p53 function in the wake of promoting p53 proteasomal degradation, because blocking p53S367p increases p53 protein levels, thereby enhancing p53 transactivation. Furthermore, abrogation of VprBP-p53 interaction by p53 acetylation is critical for preventing p53S367p and potentiating p53 function in response to DNA damage. Together, our findings establish VprBP-mediated S367p as a negative regulator of p53 function and identify a previously uncharacterized mechanism by which S367p modulates p53 stability.
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Affiliation(s)
- Nikhil Baban Ghate
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Sungmin Kim
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Roasa Mehmood
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Yonghwan Shin
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
| | - Kyunghwan Kim
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA
- Department of Biological Sciences and Biotechnology, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Woojin An
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, 90033, USA.
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Lee YR, Joo HK, Lee EO, Kim S, Jin H, Choi YH, Choi EJ, Jeon BH. Abstract 6124: Recombinant apurinic/apyrimidinic endonuclease-1/redox factor-1 plus acetylsalicylic acid combination therapy inhibits tumorigenesis in an orthotopic xenograft murine model of triple-negative breast cancer. Cancer Res 2023. [DOI: 10.1158/1538-7445.am2023-6124] [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: 04/07/2023]
Abstract
Abstract
Triple-negative breast cancer (TNBC) is characterized with hormone receptor negative and frequently exhibits inherently aggressive clinical behavior, resulting in poor prognoses. TNBCs are highly heterogenic, leading to obstacles in identifying new therapeutic targets and performing targeted therapy. Apurinic/apyrimidinic endonuclease 1/redox factor-1 (APE1/Ref-1), a multifunctional protein, is mainly involved in DNA repair and redox regulation; it is upregulated in various cancers and is extracellularly secreted because of hyperacetylation. We previously reported that hyperacetylation induced APE1/Ref-1 release causes apoptosis in TNBCs. In the current study, we aimed to assess the therapeutic efficacy of combination treatment involving recombinant human APE1/Ref-1 (rhAPE1/Ref-1) plus acetylsalicylic acid (ASA) in TNBC xenograft mice. ASA co-treatment was used to induce and lasting acetylation of rhAPE1/Ref-1. For in vivo analysis, we constructed an orthotopic xenograft in vivo model of TNBC by using MDA-MB-231 cells. We performed combination therapy involving intravenous injection of purified rhAPE1/Ref-1 (1 mg/kg) and oral administration of ASA (20 mg/kg) thrice a week for 6 weeks in TNBC xenograft mice. This rhAPE1/Ref-1 plus ASA combination therapy inhibited tumor formation and growth, without damaging liver or kidney tissue, and decreased plasma levels of the cancer marker CEA and breast cancer-specific markers CA27-29 and CA15-3 in the TNBC xenograft mice. The TNBC group, which underwent combination therapy, had more apoptotic cells and greater inflammatory cell infiltration in tumor tissues than the vehicle group did. Additionally, in tumor tissue of TNBC with combination therapy exhibits increased apoptosis following upregulation of Bax, cleaved-caspase-3, and cleaved-PARP. Thus, we found that rhAPE1/Ref-1 plus ASA combination therapy enhanced antitumor effects in TNBCs via inflammatory cell infiltration and apoptosis signaling pathways. Our findings indicate the therapeutic potential of rhAPE1/Ref-1 plus ASA combination therapy for TNBC.
Citation Format: Yu Ran Lee, Hee Kyoung Joo, Eun-Ok Lee, Sungmin Kim, Hao Jin, Yeon Hee Choi, Eun Ju Choi, Byeong Hwa Jeon. Recombinant apurinic/apyrimidinic endonuclease-1/redox factor-1 plus acetylsalicylic acid combination therapy inhibits tumorigenesis in an orthotopic xenograft murine model of triple-negative breast cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 6124.
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Affiliation(s)
- Yu Ran Lee
- 1College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Hee Kyoung Joo
- 1College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Eun-Ok Lee
- 1College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Sungmin Kim
- 1College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Hao Jin
- 1College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Yeon Hee Choi
- 1College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Eun Ju Choi
- 1College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Byeong Hwa Jeon
- 1College of Medicine, Chungnam National University, Daejeon, Republic of Korea
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Choi SK, Chung HS, Ko HS, Gen Y, Kim SM, Shin JE, Kil KC, Kim YH, Wie JH, Jo YS. Hemorrhagic morbidity in nulliparous patients with placenta previa without placenta accrete spectrum disorders. Niger J Clin Pract 2023; 26:432-437. [PMID: 37203107 DOI: 10.4103/njcp.njcp_456_22] [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] [Indexed: 05/20/2023]
Abstract
Background Placental adhesion spectrum (PAS) is a disease in which the trophoblast invades the myometrium, and is a well-known high-risk condition associated with placental previa. Aim The morbidity of nulliparous women with placenta previa without PAS disorders is unknown. Patients and Methods The data from nulliparous women who underwent cesarean delivery were collected retrospectively. The women were dichotomized into malpresentation (MP) and placenta previa groups. The placenta previa group was categorized into previa (PS) and low-lying (LL) groups. When the placenta covers the internal cervical os, it is called placenta previa, when the placenta is near the cervical os, it is called the low-lying placenta. Their maternal hemorrhagic morbidity and neonatal outcomes were analyzed and adjusted using multivariate analysis based on univariate analysis. Results A total of 1269 women were enrolled: 781 women in the MP group and 488 women in the PP-LL group. Regarding packed red blood cell transfusion, PP and LL had adjusted odds ratio (aOR) of 14.7 (95% confidence interval (CI): 6.6 - 32.5), and 11.3 (95% CI: 4.9 - 26) during admission, and 51.2 (95% CI: 22.1 - 122.7) and 10.3 (95% CI: 3.9 - 26.6) during operation, respectively. For intensive care unit admission, PS and LL had aOR of 15.9 (95% CI: 6.5 - 39.1) and 3.5 (95% CI: 1.1 - 10.9), respectively. No women had cesarean hysterectomy, major surgical complications, or maternal death. Conclusion Despite placenta previa without PAS disorders, maternal hemorrhagic morbidity was significantly increased. Thus, our results highlight the need for resources for those women with evidence of placenta previa including a low-lying placenta, even if those women do not meet PAS disorder criteria. In addition, placenta previa without PAS disorder was not associated with critical maternal complications.
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Affiliation(s)
- S K Choi
- Department of Obstetrics and Gynaecology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H S Chung
- Department of Anaesthesiology and Pain Medicine, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H S Ko
- Department of Obstetrics and Gynaecology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Y Gen
- Department of Obstetrics and Gynaecology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S M Kim
- Department of Obstetrics and Gynaecology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - J E Shin
- Department of Obstetrics and Gynaecology, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K C Kil
- Department of Obstetrics and Gynaecology, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Y H Kim
- Department of Obstetrics and Gynaecology, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - J H Wie
- Department of Obstetrics and Gynaecology, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Y S Jo
- Department of Obstetrics and Gynaecology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Lim JH, Song H, Kang GR, Kim S, Jung ST. Relationship between Slip Severity and BMI in Patients with Slipped Capital Femoral Epiphysis Treated with In Situ Screw Fixation. J Pers Med 2023; 13:jpm13040604. [PMID: 37108990 PMCID: PMC10142615 DOI: 10.3390/jpm13040604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/22/2023] [Accepted: 03/28/2023] [Indexed: 04/03/2023] Open
Abstract
Background: Slipped capital femoral epiphysis (SCFE) is a hip disorder that occurs in adolescence before epiphyseal plate closure, causing anatomical changes in the femoral head. Obesity is known to be the single most important risk factor for idiopathic slipped capital femoral epiphysis (SCFE), which is highly related to mechanical factors. Meanwhile, as increased slip angle increases major complications in patients with SCFE, slip severity is an important factor to evaluate prognosis. In obese patients with SCFE, higher shear stress is loaded on the joint, which increases the likelihood of slip. The study aim was to assess the patients with SCFE treated with in situ screw fixation according to the degree of the obesity and to find any factors affecting the severity of slip. Methods: Overall, 68 patients (74 hips) with SCFE who were treated with in situ fixation screw fixation were included (mean age 11.38, range: 6–16) years. There were 53 males (77.9%) and 15 females (22.1%). Patients were categorized underweight, normal weight, overweight, and obese depending on BMI percentile for age. We determined slip severity of patients using the Southwick angle. The slip severity was defined as mild if the angle difference was less than 30 degrees, moderate if the angle difference was between 30 and 50 degrees, and severe if the angle difference was greater than 50 degrees. To examine the effects of several variables on slip severity, we used a univariable and multivariate regression analysis. The following data were analyzed: age at surgery, sex, BMI, symptom duration before diagnosis (acute, chronic, and acute on chronic), stability, and ability to ambulate at the time of the hospital visit. Results: The mean BMI was 25.18 (range: 14.7–33.4) kg/m2. There were more patients with overweight and obese than those with normal weight in SCFE (81.1% vs. 18.9%). We did not find significant differences between overall slip severity and degree of obesity or in any subgroup analysis. Conclusions: We did not find a relationship between slip severity and degree of obesity. A prospective study related to the mechanical factors affecting the slip severity according to the degree of obesity is needed.
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Mackenzie CFR, Kwak SY, Kim S, Zysman-Colman E. The design and synthesis of green emissive iridium(III) complexes guided by calculations of the vibrationally-resolved emission spectra. Dalton Trans 2023; 52:4112-4121. [PMID: 36883433 DOI: 10.1039/d3dt00304c] [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: 03/04/2023]
Abstract
A key challenge in developing emissive materials for organic light-emitting diodes is to optimize their colour saturation, which means targeting narrowband emitters. In this combined theoretical and experimental study, we investigate the use of heavy atoms in the form of trimethylsilyl groups as a tool to reduce the intensity of the vibrations in the 2-phenylpyridinato ligands of emissive iridium(III) complexes that contribute to the vibrationally coupled modes that broaden the emission profile. An underutilised computational technique, Frank-Condon vibrationally coupled electronic spectral modelling, was used to identify the key vibrational modes that contribute to the broadening of the emission spectra in known benchmark green-emitting iridium(III) complexes. Based on these results, a family of eight new green-emitting iridium complexes containing trimethylsilyl groups substituted at different positions of the cyclometalating ligands has been prepared to explore the impact that these substituents have on reducing the intensity of the vibrations and the resulting reduction in the contribution of vibrationally coupled emission modes to the shape of the emission spectra. We have demonstrated that locating a trimethylsilyl group at the N4 or N5 position of the 2-phenylpyridine ligand damps the vibrational modes of the iridium complex and provides a modest narrowing of the emission spectrum of 8-9 nm (or 350 cm-1). The strong correlation between experimental and calculated emission spectra highlights the utility of this computational method to understand how the vibrational modes contribute to the profile of the emission spectra in phosphorescent iridium(III) emitters.
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Affiliation(s)
- Campbell Frank Ross Mackenzie
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK.
| | - Seung-Yeon Kwak
- Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd., Suwon, Gyeonggi-do 16678, Republic of Korea
| | - Sungmin Kim
- Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd., Suwon, Gyeonggi-do 16678, Republic of Korea
| | - Eli Zysman-Colman
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK.
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Lyu Z, Harada KH, Kim S, Fujitani T, Hitomi T, Pan R, Park N, Fujii Y, Kho Y, Choi K. Temporal trends in bisphenol exposures and associated health risk among Japanese women living in the Kyoto area from 1993 to 2016. Chemosphere 2023; 316:137867. [PMID: 36642136 DOI: 10.1016/j.chemosphere.2023.137867] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 01/10/2023] [Accepted: 01/12/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND Bisphenols, and especially bisphenol A, are widely used as components of epoxy resins and polycarbonate. Widespread detection and potential health risks have led to bisphenol A being replaced by other alternatives, including structurally similar bisphenol analogs. Several bisphenol analogs are suspected to have similar adverse health consequences. This study examined the temporal trends in bisphenol exposure among a group of Japanese women from 1993 to 2016, and assessed the associated health risks. METHODS We used archived single spot urine samples of healthy Japanese women living in the Kyoto area (n = 133) collected in 1993, 2000, 2003, 2009, 2011, and 2016. We measured the concentrations of 10 bisphenols in these samples. RESULTS A sharp increase in the detection rates of bisphenol F was observed after 2000. There was a distinct downward trend in urinary bisphenol A concentrations and an upward trend in bisphenol E concentrations after 2009. While the hazard index for all measured bisphenols was below 1 in all subjects, bisphenol F was determined as the most important risk driver after 2000, rather than bisphenol A. DISCUSSION Trends of decreasing bisphenol A and increasing bisphenol E exposure especially after 2011, along with no significant change in the sum of all bisphenol analogs in urine, provide clear evidence that bisphenol A has been replaced by other bisphenols in the study population. We found no significant change in the total exposure to bisphenols during the study period. Bisphenol F might become the most important bisphenol in terms of risk, while cumulative risks due to all bisphenol exposure were deemed insignificant. Considering the accumulating evidence indicating adverse effects at lower exposure levels, further studies are warranted to assess exposure and risk from bisphenol A analogs.
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Affiliation(s)
- Zhaoqing Lyu
- Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine, Yoshida, Kyoto, 606-8501, Japan
| | - Kouji H Harada
- Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine, Yoshida, Kyoto, 606-8501, Japan.
| | - Sungmin Kim
- Department of Health, Environment & Safety, Eulji University, Seongnam, 13135, Republic of Korea
| | - Tomoko Fujitani
- Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine, Yoshida, Kyoto, 606-8501, Japan
| | - Toshiaki Hitomi
- Department of Preventive Medicine, St. Marianna University School of Medicine, Kawasaki, 216-8511, Japan
| | - Rui Pan
- Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine, Yoshida, Kyoto, 606-8501, Japan; Department of Global Environmental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-0033, Japan
| | - Nayoun Park
- Department of Health, Environment & Safety, Eulji University, Seongnam, 13135, Republic of Korea
| | - Yukiko Fujii
- Department of Pharmaceutical Sciences, Daiichi University of Pharmacy, Fukuoka, 815-8511, Japan
| | - Younglim Kho
- Department of Health, Environment & Safety, Eulji University, Seongnam, 13135, Republic of Korea
| | - Kyungho Choi
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, 08826, Republic of Korea
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Machain-Williams C, Reyes-Solis GC, Blitvich BJ, Laredo-Tiscareño V, Dzul-Rosado AR, Kim S, AbuBakar S. Evaluation of an Immunoglobulin E Capture Enzyme-Linked Immunosorbent Assay for the Early Diagnosis of Dengue. Viral Immunol 2023; 36:101-109. [PMID: 36862827 DOI: 10.1089/vim.2022.0110] [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] [Indexed: 03/04/2023] Open
Abstract
Dengue virus (DENV) is the etiological agent of dengue, the most important mosquito-transmitted viral disease of humans worldwide. Enzyme-linked immunosorbent assays (ELISAs) designed to detect DENV IgM are commonly used for dengue diagnosis. However, DENV IgM is not reliably detected until ≥4 days after illness onset. Reverse transcription-polymerase chain reaction (RT-PCR) can diagnose early dengue but requires specialized equipment, reagents, and trained personnel. Additional diagnostic tools are needed. Limited work has been performed to determine whether IgE-based assays can be used for the early detection of vector-borne viral diseases, including dengue. In this study, we determined the efficacy of a DENV IgE capture ELISA for the detection of early dengue. Sera were collected within the first 4 days of illness onset from 117 patients with laboratory-confirmed dengue, as determined by DENV-specific RT-PCR. The serotypes responsible for the infections were DENV-1 and DENV-2 (57 and 60 patients, respectively). Sera were also collected from 113 dengue-negative individuals with febrile illness of undetermined etiology and 30 healthy controls. The capture ELISA detected DENV IgE in 97 (82.9%) confirmed dengue patients and none of the healthy controls. There was a high false positivity rate (22.1%) among the febrile non-dengue patients. In conclusion, we provide evidence that IgE capture assays have the potential to be explored for early diagnosis of dengue, but further research is necessary to address the possible false positivity rate among patients with other febrile illnesses.
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Affiliation(s)
- Carlos Machain-Williams
- Laboratorio de Arbovirologia, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi," Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico
| | - Guadalupe C Reyes-Solis
- Laboratorio de Arbovirologia, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi," Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico
| | - Bradley J Blitvich
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
| | - Viridiana Laredo-Tiscareño
- Laboratorio de Arbovirologia, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi," Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico.,Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
| | | | - Sungmin Kim
- Department of Infectious Diseases in Internal Medicine, Sejong Chungnam National University Hospital, School of Medicine, Chungnam National University, Sejong, Korea
| | - Sazaly AbuBakar
- Tropical Infectious Diseases Research and Education Centre (TIDREC), Higher Institution Center of Excellence (HICOE), Universiti Malaya, Kuala Lumpur, Malaysia
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Zhang W, Kim S, Wahl L, Khare R, Hale L, Hu J, Camaioni DM, Gutiérrez OY, Liu Y, Lercher JA. Low-temperature upcycling of polyolefins into liquid alkanes via tandem cracking-alkylation. Science 2023; 379:807-811. [PMID: 36821681 DOI: 10.1126/science.ade7485] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Selective upcycling of polyolefin waste has been hampered by the relatively high temperatures that are required to cleave the carbon-carbon (C-C) bonds at reasonably high rates. We present a distinctive approach that uses a highly ionic reaction environment to increase the polymer reactivity and lower the energy of ionic transition states. Combining endothermic cleavage of the polymer C-C bonds with exothermic alkylation reactions of the cracking products enables full conversion of polyethylene and polypropylene to liquid isoalkanes (C6 to C10) at temperatures below 100°C. Both reactions are catalyzed by a Lewis acidic species that is generated in a chloroaluminate ionic liquid. The alkylate product forms a separate phase and is easily separated from the reactant catalyst mixture. The process can convert unprocessed postconsumer items to high-quality liquid alkanes with high yields.
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Affiliation(s)
- Wei Zhang
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Sungmin Kim
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
| | - Lennart Wahl
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Rachit Khare
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Lillian Hale
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
| | - Jianzhi Hu
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
| | - Donald M Camaioni
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
| | - Oliver Y Gutiérrez
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
| | - Yue Liu
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany.,Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, PR China
| | - Johannes A Lercher
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany.,Institute for Integrated Catalysis, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
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Moon J, Koo D, Kim S, Panday SB. Effect of sprinting velocity on anterior cruciate ligament and knee load during sidestep cutting. Front Bioeng Biotechnol 2023; 11:1033590. [PMID: 36824350 PMCID: PMC9941960 DOI: 10.3389/fbioe.2023.1033590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 01/23/2023] [Indexed: 02/10/2023] Open
Abstract
The purpose of the study was to investigate the effect of an increase in sprinting velocity on the anterior cruciate ligament (ACL) load, knee joint load, and activation of femoral muscles using the musculoskeletal modeling approach. Fourteen high school male athletes were recruited (age: 17.4 ± 0.7 years, height: 1.75 ± 0.04 m, weight: 73.3 ± 8.94 kg), with the right foot dominant and physical activity level of about 3-4 h per day. The kinematics, kinetics, and co-contraction index (CCI) of the extensors and flexors of the right leg's femoral muscles were calculated. The anterior cruciate ligament load was estimated using the musculoskeletal modeling method. In the results, it was observed that the anterior cruciate ligament load (p < 0.017) increased as sidestep cutting velocity increased, resulting in increased adduction (p < 0.017) and the internal rotation moment of the knee joint. This was significantly higher than when sprinting at a similar velocity. The co-contraction index result, which represents the balanced activation of the femoral extensor and flexor muscles, showed a tendency of decrement with increasing sprinting velocity during sidestep cutting (p < 0.017), whereas no significant differences were observed when running at different sprinting conditions. Therefore, we postulate that factors such as knee joint shear force, extended landing posture with increasing sprinting velocity, internal rotation moment, and femoral muscle activity imbalance influence the increase of anterior cruciate ligament load during a sidestep cutting maneuver.
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Affiliation(s)
- Jeheon Moon
- Department of Physical Education, Korea National University of Education, Chungbuk, Republic ofKorea
| | - Dohoon Koo
- Department of Exercise Prescription, Jeonju University, Chonbuk, Republic ofKorea
| | - Sungmin Kim
- Institute of School Physical Education, Korea National University of Education, Chungbuk, Republic ofKorea
| | - Siddhartha Bikram Panday
- Department of Physical Education, Hanyang University, Seoul, Republic ofKorea,Department of Art and Sportainment, Hanyang University, Seoul, Republic ofKorea,*Correspondence: Siddhartha Bikram Panday,
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Lee EO, Joo HK, Lee YR, Kim S, Lee KH, Lee SD, Jeon BH. APE1/Ref-1 Inhibits Adipogenic Transcription Factors during Adipocyte Differentiation in 3T3-L1 Cells. Int J Mol Sci 2023; 24:ijms24043251. [PMID: 36834665 PMCID: PMC9961804 DOI: 10.3390/ijms24043251] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/26/2023] [Accepted: 02/03/2023] [Indexed: 02/10/2023] Open
Abstract
Apurinic/apyrimidinic endonuclease 1/redox factor-1 (APE1/Ref-1) is a multifunctional protein involved in DNA repair and redox regulation. The redox activity of APE1/Ref-1 is involved in inflammatory responses and regulation of DNA binding of transcription factors related to cell survival pathways. However, the effect of APE1/Ref-1 on adipogenic transcription factor regulation remains unknown. In this study, we investigated the effect of APE1/Ref-1 on the regulation of adipocyte differentiation in 3T3-L1 cells. During adipocyte differentiation, APE1/Ref-1 expression significantly decreased with the increased expression of adipogenic transcription factors such as CCAAT/enhancer binding protein (C/EBP)-α and peroxisome proliferator-activated receptor (PPAR)-γ, and the adipocyte differentiation marker adipocyte protein 2 (aP2) in a time-dependent manner. However, APE1/Ref-1 overexpression inhibited C/EBP-α, PPAR-γ, and aP2 expression, which was upregulated during adipocyte differentiation. In contrast, silencing APE1/Ref-1 or redox inhibition of APE1/Ref-1 using E3330 increased the mRNA and protein levels of C/EBP-α, PPAR-γ, and aP2 during adipocyte differentiation. These results suggest that APE1/Ref-1 inhibits adipocyte differentiation by regulating adipogenic transcription factors, suggesting that APE1/Ref-1 is a potential therapeutic target for regulating adipocyte differentiation.
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Affiliation(s)
- Eun-Ok Lee
- Research Institute of Medical Sciences, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
| | - Hee-Kyoung Joo
- Research Institute of Medical Sciences, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
| | - Yu-Ran Lee
- Research Institute of Medical Sciences, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
| | - Sungmin Kim
- Research Institute of Medical Sciences, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
| | - Kwon-Ho Lee
- Department of Physical Therapy, Joongbu University, 201 Daehak-ro, Geumsan-gun 32713, Chungcheongnam-do, Republic of Korea
| | - Sang-Do Lee
- Research Institute of Medical Sciences, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
| | - Byeong-Hwa Jeon
- Research Institute of Medical Sciences, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
- Department of Medical Science, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Jung-gu, Republic of Korea
- Correspondence: ; Tel.: +82-42-580-8214
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Shin MY, Choi JW, Lee S, Kim S, Kho Y, Choi K, Kim S. Pharmacokinetics of transdermal methyl-, ethyl-, and propylparaben in humans following single dermal administration. Chemosphere 2023; 310:136689. [PMID: 36220432 DOI: 10.1016/j.chemosphere.2022.136689] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/13/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Parabens are common chemicals used as preservatives in foods, cosmetics, and personal care products. Although transdermal exposure to parabens occurs, studies on human pharmacokinetics (PK) following dermal exposure to parabens are scarce. In this study, the PK following dermal exposure to parabens was determined and compared with our previous findings on oral exposure. A paraben mixture cream containing 0.8% deuterated methyl-, ethyl-, and propylparaben (MeP-d4 0.26%; EtP-d4 0.26%, and PrP-d4 0.28%) was dermally applied to the whole arm of five male volunteers at a dose of 24 g/person over 30 min. Blood and urine samples were collected at several intervals over the course of 48 h to measure the levels of MeP-d4, EtP-d4, and PrP-d4 and their conjugated metabolites using HPLC-MS/MS. As a result of non-compartmental analysis, the average peak values of total (sum of conjugated and unconjugated metabolites) MeP-d4, EtP-d4, and PrP-d4 were reached at 7.8 h, 10.5 h, and 5.3 h, indicating a slower absorption rate compared to that of oral exposure (<2 h). The terminal elimination half-lives of MeP-d4, EtP-d4, and PrP-d4 were 12.2 h, 12.0 h, and 9.3 h, respectively. Fractional urinary excretion (Fue) of total MeP-d4, EtP-d4, and PrP-d4 was 1.7%, 2.3%, and 1.9%, respectively. The Fue of total and unconjugated PrP-d4 following dermal exposure was five times lower and three times higher, respectively, compared with those after oral exposure, suggesting that PrP is relatively less metabolized to the conjugated form after dermal exposure. Taken together, dermal exposure to paraben leads to a longer apparent half-life and results in higher proportions of biologically active unconjugated parabens in the systemic circulation as compared to oral exposure. This study provides insights into the kinetic properties of parabens and their metabolites in humans.
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Affiliation(s)
- Mi-Yeon Shin
- Graduate School of Public Health, Seoul National University, Seoul, South Korea; Office of Dental Education, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Jeong Weon Choi
- Graduate School of Public Health, Seoul National University, Seoul, South Korea
| | - Seungho Lee
- Department of Preventive Medicine, College of Medicine, Dong-A University, Busan, South Korea
| | - Sungmin Kim
- Department of Health, Environmental and Safety, School of Human and Environmental Sciences, Eulji University, Seongnam-si, Gyeonggi-do, South Korea
| | - Younglim Kho
- Department of Health, Environmental and Safety, School of Human and Environmental Sciences, Eulji University, Seongnam-si, Gyeonggi-do, South Korea
| | - Kyungho Choi
- Graduate School of Public Health, Seoul National University, Seoul, South Korea; Institute of Health and Environment, Graduated School of Public Health, Seoul National University, Seoul, South Korea
| | - Sungkyoon Kim
- Graduate School of Public Health, Seoul National University, Seoul, South Korea; Institute of Health and Environment, Graduated School of Public Health, Seoul National University, Seoul, South Korea.
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Lee S, Jeong J, Kim N, Shin M, Kim S. Improving Performance of the Human Pupil Orbit Model (HPOM) Estimation Method for Eye-Gaze Tracking. Sensors (Basel) 2022; 22:9398. [PMID: 36502099 PMCID: PMC9737162 DOI: 10.3390/s22239398] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Eye-gaze direction-tracking technology is used in fields such as medicine, education, engineering, and gaming. Stability, accuracy, and precision of eye-gaze direction-tracking are demanded with simultaneous upgrades in response speed. In this study, a method is proposed to improve the speed with decreases in the system load and precision in the human pupil orbit model (HPOM) estimation method. The new method was proposed based on the phenomenon that the minor axis of the elliptical-deformed pupil always pointed toward the rotational center presented in various eye-gaze direction detection studies and HPOM estimation methods. Simulation experimental results confirmed that the speed was improved by at least 74 times by consuming less than 7 ms compared to the HPOM estimation. The accuracy of the eye's ocular rotational center point showed a maximum error of approximately 0.2 pixels on the x-axis and approximately 8 pixels on the y-axis. The precision of the proposed method was 0.0 pixels when the number of estimation samples (ES) was 7 or less, which showed results consistent with those of the HPOM estimation studies. However, the proposed method was judged to work conservatively against the allowable angle error (AAE), considering that the experiment was conducted under the worst conditions and the cost used to estimate the final model. Therefore, the proposed method could estimate HPOM with high accuracy and precision through AAE adjustment according to system performance and the usage environment.
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Affiliation(s)
- Seungbong Lee
- Department of Medical Biotechnology, Dongguk University Biomedi Campus, 32, Dongguk-ro, Ilsan dong-gu, Goyang-si 10326, Republic of Korea
| | - Jaehoon Jeong
- Medical Device Industry Program in Graduate School, Dongguk University, 30, Pildong-ro 1-gill, Jung-gu, Seoul 04620, Republic of Korea
| | - Nahyun Kim
- Department of Medical Biotechnology, Dongguk University Biomedi Campus, 32, Dongguk-ro, Ilsan dong-gu, Goyang-si 10326, Republic of Korea
| | - Manjae Shin
- Department of Medical Biotechnology, Dongguk University Biomedi Campus, 32, Dongguk-ro, Ilsan dong-gu, Goyang-si 10326, Republic of Korea
| | - Sungmin Kim
- Department of Medical Biotechnology, Dongguk University Biomedi Campus, 32, Dongguk-ro, Ilsan dong-gu, Goyang-si 10326, Republic of Korea
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Kim D, Woo J, Jeong J, Kim S. The sound stimulation method and EEG change analysis for development of digital therapeutics that can stimulate the nervous system: Cortical activation and drug substitution potential. CNS Neurosci Ther 2022; 29:402-411. [PMID: 36377425 PMCID: PMC9804039 DOI: 10.1111/cns.14014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 10/17/2022] [Accepted: 10/18/2022] [Indexed: 11/16/2022] Open
Abstract
INTRODUCTION The purpose of this study is to propose a treatment method and the effect on the nervous system of digital therapeutics, which is a new treatment method to replace surgery and drug prescription for the treatment and prevention of diseases. METHODS The 20 subjects who participated in the experiment, including men and women, had an average age of 26 ± 2.40 years. The proposed treatment method used three types of sound stimulation and air or bone conduction sound transmission methods to induce total of 6-time EEG electroencephalogram(EEG) changes. EEG was measured with 200 sampling rate each in the P4, Cz, F8 and T7 channel located in the parietal, central, frontal and temporal lobes, respectively, according to the 10/10 system. A total of 2 min of data were created by extracting EEG signals with less noise from the measured data and the extracted data were applied with a 1-40 Hz Butterworth filter and a 50 Hz notch filter with a quality factor of 30. After that, EEG are subdivided into delta (0.5-4 Hz), theta (4-8 Hz), alpha (8-13 Hz), beta (13-30 Hz), and gamma (30-45 Hz) bands. Finally, EEG changes in response to sound stimuli were analyzed using power spectral density and T-test validation in the frequency band. RESULTS When a sound stimulus of less than 1 KHz was stimulated by air conduction, brainstem activation was induced and the reticular activation system was activated. In addition, a great potential for replacing drugs was confirmed by inducing changes in the nervous system similar to drugs used for sedation. CONCLUSION These results will be able to expand the concept of digital therapeutics, and it is expected that it will be developed as a safer treatment method that can replace surgery and drugs.
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Affiliation(s)
- Deachang Kim
- Department of Medical BiotechnologyDongguk University‐Bio Medi CampusSouth Korea
| | - JaeHyun Woo
- Department of R&D SupportResearch Institute for Commercialization of Biomedical Convergence TechnologySeoulSouth Korea
| | - Jeahoon Jeong
- Research Institute for Commercialization of Biomedical Convergence TechnologyDongguk UniversitySouth Korea
| | - Sungmin Kim
- Department of Medical BiotechnologyDongguk University‐Bio Medi CampusSouth Korea
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Lee YJ, Park E, Park KS, Lim JH, Kim S, Kim MS, Eom TJ. Quantification method to objectively evaluate the fibrous structural status of tendons based on polarization-sensitive OCT. J Biophotonics 2022; 15:e202200065. [PMID: 35766447 DOI: 10.1002/jbio.202200065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 06/27/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
Histological analysis is widely used to evaluate injured tendons; however, it has the limitation of being semi-quantitative. Hence, we developed a quantification method to objectively evaluate the fibrous structure of tendons, exhibiting the optical property of birefringence, using polarization-sensitive optical coherence tomography (PS-OCT). We used a partial-rupture rat model in which the middle 0.75 cm of the Achilles tendon was cut with a blade. Rats were sacrificed at 2, 4 or 6 weeks after the injury, and PS-OCT and histological analyzes were performed. The PS-OCT phase retardation images and score well represented the structural changes of the injured tendon according to the wound healing state. Therefore, the proposed novel quantification method using PS-OCT can be used to evaluate the fibrous structural status of tendons.
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Affiliation(s)
- Yong-Jae Lee
- Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju, South Korea
- Engineering Research Center for Color-modulated Extra-sensory Perception Technology, Pusan National University, Busan, South Korea
| | - Eunwoo Park
- Department of Convergence IT Engineering, Pohang University of Science and Technology, Pohang, South Korea
| | - Kwan Seob Park
- Physical Measurement Laboratory, National Institute of Standard and Technology, Gaithersburg, Maryland, USA
| | - Jun-Hyuk Lim
- Department of Orthopedic Surgery, Chonnam National University Hospital, Chonnam National University College of Medicine, Gwangju, South Korea
| | - Sungmin Kim
- Department of Orthopedic Surgery, Chonnam National University Hospital, Chonnam National University College of Medicine, Gwangju, South Korea
| | - Myung-Sun Kim
- Department of Orthopedic Surgery, Chonnam National University Hospital, Chonnam National University College of Medicine, Gwangju, South Korea
| | - Tae Joong Eom
- Engineering Research Center for Color-modulated Extra-sensory Perception Technology, Pusan National University, Busan, South Korea
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, South Korea
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Kim J, Hwang KY, Kim S, Lim J, Kang B, Lee KH, Choi B, Kwak S, Lee JY. Enhancing Horizontal Ratio of Transition Dipole Moment in Homoleptic Ir Complexes for High Outcoupling Efficiency of Organic Light-Emitting Diodes. Adv Sci (Weinh) 2022; 9:e2203903. [PMID: 36055795 PMCID: PMC9631091 DOI: 10.1002/advs.202203903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/12/2022] [Indexed: 06/15/2023]
Abstract
The light-emitting dipole orientation (EDO) of a phosphorescent emitter is a key to improving the external quantum efficiency (EQE) of organic light-emitting diodes (OLEDs) without structural modification of the device. Here, four homoleptic Ir complexes as a phosphorescent emitter are systematically designed based on the molecular structure of tris(2-phenylpyridine)iridium(III) (Ir(ppy)3 ) to control the EDO. Trimethylsilane, methyl, 2-methylpropyl, and cyclopentylmethyl group substituted to pyridine ring of the ligand contribute to the improvement of the EDO from 76.5% for Ir(ppy)3 to 87.5%. A linear relationship between the EDO and the aspect ratio (geometric anisotropy factor) is founded, implying the importance of the effective area for the nonbonding force between host and dopant molecules. Also, it is investigated that the EDO enhancement mainly originates from the vertical alignment of the C3 axis of molecule in the substrate axis rather than the change in the direction of the transition dipole alignment in the molecular axis. The optical simulation reveals that the outcoupling efficiency of phosphorescent OLEDs adopting new dopants reaches 38.4%. The green OLEDs exhibiting 28.3% of EQE, 103.2 cd A-1 of current efficiency, and 98.2 lm W-1 of power efficiency are demonstrated, which is understood to have little electrical loss.
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Affiliation(s)
- Jae‐Min Kim
- School of Chemical EngineeringSungkyunkwan University2066, Seobu‐ro, Jangan‐guSuwonGyeonggi‐do16419Republic of Korea
| | - Kyu Young Hwang
- Samsung Advanced Institute of TechnologySamsung Electronics Co. Ltd.SuwonGyeonggi‐do16678Republic of Korea
| | - Sungmin Kim
- Samsung Advanced Institute of TechnologySamsung Electronics Co. Ltd.SuwonGyeonggi‐do16678Republic of Korea
| | - Junseop Lim
- School of Chemical EngineeringSungkyunkwan University2066, Seobu‐ro, Jangan‐guSuwonGyeonggi‐do16419Republic of Korea
| | - Byungjoon Kang
- Samsung Advanced Institute of TechnologySamsung Electronics Co. Ltd.SuwonGyeonggi‐do16678Republic of Korea
| | - Kum Hee Lee
- Samsung Advanced Institute of TechnologySamsung Electronics Co. Ltd.SuwonGyeonggi‐do16678Republic of Korea
| | - Byoungki Choi
- Samsung Advanced Institute of TechnologySamsung Electronics Co. Ltd.SuwonGyeonggi‐do16678Republic of Korea
| | - Seung‐Yeon Kwak
- Samsung Advanced Institute of TechnologySamsung Electronics Co. Ltd.SuwonGyeonggi‐do16678Republic of Korea
| | - Jun Yeob Lee
- School of Chemical EngineeringSungkyunkwan University2066, Seobu‐ro, Jangan‐guSuwonGyeonggi‐do16419Republic of Korea
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Lee YH, Kim SM, Kim EK, Park SJ, Lee SC, Park SW, Jeong DS, Chang SA. Pattern of pericardial calcification determines the mid-term postoperative outcome after pericardiectomy in chronic constrictive pericarditis. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1797] [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: 11/15/2022] Open
Abstract
Abstract
Background/Introduction
Although pericardiectomy is an effective treatment of constrictive pericarditis (CP), clinical outcome is not always successful. Pericardial calcification is a unique finding in CP. However, the amount and localization of calcification vary. Computer tomography (CT) can visualize the pericardial calcification with high sensitivity and provide the anatomical assessment.
Purpose
We investigated that how the pattern and amount of pericardial calcification affect the mid-term postoperative outcome after pericardiectomy in CP.
Methods
All of the patients who underwent total pericardiectomy in our hospital from 2010 to 2020 were derived from electrical medical records (n=105). Among them, preoperative CT scans (non-gated non-contrast) of 98 patients were available and, thus, 98 consecutive patients were finally analyzed. Medical records were reviewed in a retrospective manner. Cardiovascular event is defined as cardiovascular death or hospitalization associated with a heart failure symptom and all cause event is defined as all events that require admission. CT scan was analyzed by Aquarius Workstation, and the volume and localization pattern of pericalcification were derived. Pericardium calcium score was given as an Agatston score.
Results
Of 98 patients, 25 (25.5%) patients were hospitalized with heart failure symptom after pericardiectomy. Median follow up duration of patients is 172 weeks. A group with cardiovascular event had higher NYHA grade (P<0.001), lower calcium volume (P=0.004), and lower calcium score (P=0.01). Multivariate cox proportional analysis showed that high ln(calcium score) before pericardiectomy was dependent predictor of cardiovascular event (hazard ratio, 0.90; P=0.04) and all cause event (hazard ratio, 0.91, P=0.04) after pericardiectomy. When we set the cut off value at 7.22, based on ROC curve, there was a significant difference in cardiovascular event between the groups divided by this cutoff value in Kaplan-Meier curve (P=0.002) and multivariate cox proportional analysis (P=0.04). In the subgroup analysis, myocardium invasion and circumferential calcification were more common in the high calcium score group. Idiopathic & tuberculosis pericarditis were more associated with high calcium score group and post-operative pericarditis, other reasons (infection, radiation, etc) were more associated with low calcium group.
Conclusion
Low burden of pericardial calcification was associated high rate of mid-term clinical event after pericardiectomy CP. Preoperative evaluation of pericardial calcification pattern can be used as predictor of postoperative outcomes.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- Y H Lee
- Sungkyunkwan University School of Medicine , Seoul , Korea (Republic of)
| | - S M Kim
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Department of Radiology , Seoul , Korea (Republic of)
| | - E K Kim
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - S J Park
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - S C Lee
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - S W Park
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
| | - D S Jeong
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Department of Thoracic and Cardiovascular Surgery , Seoul , Korea (Republic of)
| | - S A Chang
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Division of Cardiology, Department of Internal Medicine , Seoul , Korea (Republic of)
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Bak M, Choi KH, Kim JH, Park TK, Kim EK, Kim SM, Choi SH, Park SJ. Risk factors and clinical effects of late leaflet thrombosis after transcatheter aortic valve replacement. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1569] [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
As the indications for trans-catheter aortic valve replacement (TAVR) expand, it is expected that the number of TAVR patients would increase and the follow-up duration would be longer. It is known that the incidence of leaflet thrombosis is higher in TAVR than in surgical aortic valve replacement (SAVR), but not much is known about the risk factors of late leaflet thrombosis in TAVR.
Aim
Therefore, in this study, the incidence and risk factors of late leaflet thrombosis at late term after TAVR and the effect on clinical course of late leaflet thrombosis would be investigated.
Method
There were 176 patients undergone TAVR from January 2015 to October 2020 in one tertiary hospital of south korea. 94 patients had follow-up cardiovascular computed tomography (CT) between 3 months and 2 years after TAVR. Among 94 patients, late leaflet thrombosis was discovered at 20 patients, and risk factors were analyzed by comparing clinical factors, echocardiographic and cardiovascular CT information, and angiographic data between the group with and without late leaflet thrombosis. And the difference in aortic valve hemodynamics between the group with and without leaflet thrombosis was examined and clinical outcomes were compared. Clinical outcome was defined as the composite of all-cause death, stroke, heart failure (HF) admission, redo-aortic valve (AV) replacement and major bleeding after detection of late leaflet thrombosis.
Results
Indexed mean sinus of Valsalva diameter, AV calcium score and post procedure estimated orifice area (EOA) had predictability of late leaflet thrombosis with AUC value of 0.670 (95% CI [0.546–0.795], p value = 0.020), AUC value of 0.698 (95% CI [0.544–0.851], p value = 0.012) and AUC value of 0.665 (95 percent CI [0.548–0.782], p value = 0.031), respectively (Figure 1).
In echocardiography performed at the time of follow-up CT, AV max velocity and AV mean pressure gradient were higher in thrombosis group and EOA and Doppler velocity index were lower in thrombosis group than in no thrombosis group within normal range (Figure 2). Clinical outcome was not significant different between the two groups (log rank p value = 0.560).
Conclusion
Larger indexed sinus of Valsalva diameter, higher AV calcium score and smaller post procedure AV EOA were risk factors for late leaflet thrombosis after TAVR. Subclinical late leaflet thrombosis have a benign course when properly managed.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- M Bak
- Samsung Medical Center, Division of Cardiology, Cardiovascular Imaging Center, Heart Vascular Stroke Institute , Seoul , Korea (Republic of)
| | - K H Choi
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - J H Kim
- Samsung Medical Center, Division of Cardiology, Cardiovascular Imaging Center, Heart Vascular Stroke Institute , Seoul , Korea (Republic of)
| | - T K Park
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - E K Kim
- Samsung Medical Center, Division of Cardiology, Cardiovascular Imaging Center, Heart Vascular Stroke Institute , Seoul , Korea (Republic of)
| | - S M Kim
- Samsung Medical Center, Department of Radiology, Cardiovascular Imaging Center, Heart Vascular Stroke Institute , Seoul , Korea (Republic of)
| | - S H Choi
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - S J Park
- Samsung Medical Center, Division of Cardiology, Cardiovascular Imaging Center, Heart Vascular Stroke Institute , Seoul , Korea (Republic of)
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Kim S, Oh HS, Lee M, Jung ST. Effect of Postoperative Femoral Neck Shaft Angle on Femoral Head Sphericity Following Proximal Femoral Osteotomy in Legg-Calve-Perthes Disease. J Pediatr Orthop 2022; 42:432-438. [PMID: 35794820 DOI: 10.1097/bpo.0000000000002200] [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: 02/07/2023]
Abstract
BACKGROUND Herein, we aimed to examine the relationship between the postoperative neck shaft angle (NSA) and the Stulberg outcome at skeletal maturity in patients with Legg-Calvé-Perthes disease (LCPD) who underwent proximal femoral varus osteotomy (PFVO) and to determine the optimal angle of varization. METHODS In this retrospective study, we analyzed the data of 90 patients aged older than 6 years at the time of diagnosis with LCPD who underwent PFVO at our institution between 1979 and 2014. Univariate and multivariate logistic regression analyses were used to examine the effects of variables on the sphericity of the femoral head at skeletal maturity, including the age at onset, sex, stage at operation, extent of epiphyseal involvement and epiphyseal collapse, presence of specific epiphyseal, metaphyseal, and acetabular changes, and postoperative NSA. The sphericity of the femoral head on the final plain follow-up radiographs of the hip joint at skeletal maturity was assessed using the Stulberg classification. Cases of spherical femoral head (Stulberg I or II) were rated as good, whereas those of ovoid or flat femoral head (Stulberg III, IV, or V) were rated as bad. RESULTS The mean age at diagnosis was 7.93 (range, 6.0-12.33) years. The average follow-up period was 10.11 (range, 5.25-22.92) years. The pre and postoperative mean NSAs were 137.31±6.86 degrees (range, 115.7-158 degrees) and 115.7±9.83 degrees (range, 88.6-137.6 degrees), respectively. The age at diagnosis, lateral pillar classification, and postoperative NSA were found to be closely related to the sphericity of the femoral head at skeletal maturity. Patients with a postoperative NSA of <105 degree or more than 125 degree were less likely to have a spherical femoral head. CONCLUSIONS Our study showed that patients with a postoperative NSA between 105 and 125 degrees were more likely to have a spherical femoral head. When performing PFVO in patients with LCPD, reasonable varus angulation of PFVO should be taken into consideration for the success of the operation. LEVEL OF EVIDENCE Level III retrospective cohort study.
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Affiliation(s)
- Sungmin Kim
- Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital, Dong-gu, Gwangju Republic of Korea
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Kim S, An JN, Song YR, Kim SG, Lee HS, Cho AJ, Kim JK. Effect of once-weekly dulaglutide on renal function in patients with chronic kidney disease. PLoS One 2022; 17:e0273004. [PMID: 35960776 PMCID: PMC9374206 DOI: 10.1371/journal.pone.0273004] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 07/30/2022] [Indexed: 11/29/2022] Open
Abstract
Background Dulaglutide is associated with improved cardiovascular and kidney outcomes and can be a good therapeutic option for patients with type 2 diabetes with chronic kidney disease (CKD). In this study, the effects of dulaglutide on glucose-lowering efficacy and changes in renal function were analyzed. Methods This retrospective study involved 197 patients with type 2 diabetes with mild-to-severe CKD treated with dulaglutide for at least 3 months between January 2017 and December 2020 at two tertiary hospitals in Korea. Changes in the creatinine-based estimated glomerular filtration rate (eGFR) and HbA1c were compared before and after the use of dulaglutide in each patient. Results The number of patients and mean eGFR (mL/min/1.73 m2) in CKD 2, 3a, 3b, and 4 were 94 (75.0 ± 8.5), 46 (54.8 ± 6.3), 31 (38.8 ± 4.4), and 26 (22.5 ± 5.4), respectively. Mean HbA1c level and body mass index (BMI) at the initiation of dulaglutide were 8.9% ± 1.4% and 29.1 ± 3.6 kg/m2, the median duration of the use of dulaglutide was 16 months. The use of dulaglutide was associated with a mean decrease in HbA1c by 0.9% ± 1.5% and the glucose-lowering efficacy was similar across all stages of CKD. Also, it was associated with a reduced decline in the eGFR; the mean eGFR change after the use of dulaglutide was –0.76 mL/min/1.73 m2 per year, whereas it was –2.41 mL/min/1.73 m2 before use (paired t-test, P = 0.003). The difference was more pronounced in patients with an eGFR < 60 mL/min/1.73 m2. Subgroup analysis showed that the renal protective effect was better in patients with proteinuria, age ≤ 65 years, and HbA1c < 9.0%, but showed no association with BMI. Conclusions The use of dulaglutide provided adequate glycemic control irrespective of CKD stage and was associated with a reduced decline in the eGFR in the CKD population.
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Affiliation(s)
- Sungmin Kim
- Department of Internal Medicine & Kidney Research Institute, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Jung Nam An
- Department of Internal Medicine & Kidney Research Institute, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Young Rim Song
- Department of Internal Medicine & Kidney Research Institute, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Sung Gyun Kim
- Department of Internal Medicine & Kidney Research Institute, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Hyung Seok Lee
- Department of Internal Medicine & Kidney Research Institute, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - AJin Cho
- Department of Internal Medicine & Kidney Research Institute, Kangnam Sacred Heart Hospital, Seoul, Korea
- * E-mail: (JKK); (AC)
| | - Jwa-Kyung Kim
- Department of Internal Medicine & Kidney Research Institute, Hallym University Sacred Heart Hospital, Anyang, Korea
- * E-mail: (JKK); (AC)
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Park BK, Park H, Park KB, Rhee I, Kim S, Kim HW. Fate of hips complicated by avascular necrosis of the femoral head following reconstructive surgery in nonambulatory patients with cerebral palsy. Sci Rep 2022; 12:11767. [PMID: 35817817 PMCID: PMC9273671 DOI: 10.1038/s41598-022-16023-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 07/04/2022] [Indexed: 11/12/2022] Open
Abstract
The purpose of this study was to evaluate the influence of avascular necrosis of the femoral head (AVN) following hip reconstructions on the future hip development of cerebral palsy (CP) patients. A retrospective study of 394 hips in 205 nonambulatory patients with spastic CP who underwent reconstructive hip surgery was performed. The mean age at surgery was 7.3 ± 2.4 years. The mean follow-up duration was 5.6 ± 2.7 years, and the mean age at the latest follow-up was 12.8 ± 3.4 years. AVN was classified in terms of its severity and location. Femoral head remodelling was assessed by the spherical index and the Mose circle. An unsatisfactory radiological outcome was defined as having a migration percentage of more than 30% at the final follow-up. AVN was observed in 169 (42.9%) hips. Older age at the time of surgery, higher preoperative migration percentage, and open reduction procedures were predictors for the development of AVN. Hips with AVN confined to the lateral epiphysis, and AVN involving the entire epiphysis with preserved height experienced successful remodelling. 27 (65.9%) of the 41 hips with unsatisfactory outcomes experienced AVN. Younger age, higher postoperative migration percentage, and occurrence of AVN were related to unsatisfactory outcomes. The highest incidence of failed remodelling and unsatisfactory outcomes were observed in hips with entire epiphyseal involvement and more than 50% loss of its height. AVN following hip reconstructions is not necessarily associated with poor hip development, however, depending on the severity and location, it is a prognostic factor for unsatisfactory radiological outcomes.
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Affiliation(s)
- Byoung Kyu Park
- Department of Orthopaedic Surgery, Inje University Haeundae Paik Hospital, Busan, Republic of Korea
| | - Hoon Park
- Department of Orthopaedic Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Kun Bo Park
- Division of Pediatric Orthopaedic Surgery, Severance Children's Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Isaac Rhee
- Department of Orthopaedics, St Vincent's Hospital, Melbourne, Australia
| | - Sungmin Kim
- Department of Orthopaedic Surgery, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Hyun Woo Kim
- Division of Pediatric Orthopaedic Surgery, Severance Children's Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
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Kim D, Lee Y, Jeong J, Kim S. Stimulation method and individual health index study for real-time cardiovascular and autonomic nervous system reactivity analysis using PPG signal. Biomed Signal Process Control 2022. [DOI: 10.1016/j.bspc.2022.103714] [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]
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Lyu Z, Harada KH, Kim S, Fujitani T, Cao Y, Hitomi T, Fujii Y, Kho Y, Choi K. Exposure to phthalate esters in Japanese females in Kyoto, Japan from 1993 to 2016: Temporal trends and associated health risks. Environ Int 2022; 165:107288. [PMID: 35588674 DOI: 10.1016/j.envint.2022.107288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 05/06/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
Phthalates are used as plasticizers in many products used in daily life worldwide. Due to industrial and economic developments, exposure among general population to phthalates may vary geographically and temporally. However, studies are lacking for investigating temporal changes in phthalate exposure in the Japanese population. In the present study, the temporal trends in exposure to various phthalates were assessed among a group of Japanese adult female population over 1993-2016 and derived associated risks. For this purpose, urine samples of healthy Japanese females in Kyoto, Japan (N = 132) collected in 1993, 2000, 2003, 2009, 2011, and 2016, were employed and measured for the concentrations of 18 phthalate metabolites. Over this period, the detection rates of mono(3-carboxypropyl) phthalate (MCPP) and monoisobutyl phthalate (MiBP) decreased, and the geometric means of the urinary concentrations of mono(2-ethyl-5-carboxypentyl) phthalate (MECPP), and mono(2-ethyl-5-oxohexyl) phthalate (MEOHP) showed a significant decreasing trend. Cumulative risk due to exposure to dibutyl phthalate (DBP), diisobutyl phthalate (DiBP), butyl benzyl phthalate (BBP), and di-2-ethylhexyl phthalate (DEHP) showed a dramatic decrease only between 1993 and 2000. The maximum hazard quotient (HQM) was attributed to DEHP in most subjects regardless of sampling year. This study showed the temporal trend of the exposure of Japanese females to several phthalate esters over two decades. As of the late 2010's, DEHP was still the predominant component of phthalate ester exposure in the population. The HI value, however, indicates that direct risk due to phthalate exposure was unlikely among the studied population.
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Affiliation(s)
- Zhaoqing Lyu
- Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine, Yoshida, Kyoto 606-8501, Japan
| | - Kouji H Harada
- Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine, Yoshida, Kyoto 606-8501, Japan.
| | - Sungmin Kim
- Department of Health, Environment & Safety, Eulji University, Seongnam 13135, Republic of Korea
| | - Tomoko Fujitani
- Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine, Yoshida, Kyoto 606-8501, Japan
| | - Yang Cao
- Department of Preventive Medicine, St. Marianna University School of Medicine, Kawasaki 216-8511, Japan
| | - Toshiaki Hitomi
- Department of Preventive Medicine, St. Marianna University School of Medicine, Kawasaki 216-8511, Japan
| | - Yukiko Fujii
- Department of Pharmaceutical Sciences, Daiichi University of Pharmacy, Fukuoka 815-8511, Japan
| | - Younglim Kho
- Department of Health, Environment & Safety, Eulji University, Seongnam 13135, Republic of Korea
| | - Kyungho Choi
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul 08826, Republic of Korea
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Abstract
In this study, a wettability-predicting method that uses an artificial neural network (ANN) by learning from digital images of the actual surface structures was developed. Polyester film surfaces were treated with oxygen plasma to realize various nanostructured surfaces. Surface structural characteristics from SEM images were quantified in a multifaceted way using a box-counting algorithm, a gray-level co-occurrence matrix algorithm, and binary image analysis. An ANN model that can predict wettability from surface structures was developed using the quantified surface structure and the resulting wettability as learning data. Furthermore, a surface with an optimal nanostructure to achieve superhydrophobicity was suggested by considering extracted surface structural parameters that significantly affect the surface wettability.
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Affiliation(s)
- Yoonkyung Cho
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
| | - Sungmin Kim
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea
| | - Chung Hee Park
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea
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Shi HJ, Nham E, Kim B, Joo EJ, Cheong HS, Hong SH, Hyun M, Kim HA, Jang S, Rhee JY, Kim J, Kim S, Cho HK, Wi YM, Cheon S, Kim YS, Lim S, Seok H, Jung SI, Eom JS, Peck KR. Clinical Characteristics and Risk Factors for Mortality in Critical Coronavirus Disease 2019 Patients 50 Years of Age or Younger During the Delta Wave: Comparison With Patients > 50 Years in Korea. J Korean Med Sci 2022; 37:e175. [PMID: 35668685 PMCID: PMC9171351 DOI: 10.3346/jkms.2022.37.e175] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 05/06/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Numerous patients around the globe are dying from coronavirus disease 2019 (COVID-19). While age is a known risk factor, risk analysis in the young generation is lacking. The present study aimed to evaluate the clinical features and mortality risk factors in younger patients (≤ 50 years) with a critical case of COVID-19 in comparison with those among older patients (> 50 years) in Korea. METHODS We analyzed the data of adult patients only in critical condition (requiring high flow nasal cannula oxygen therapy or higher respiratory support) hospitalized with PCR-confirmed COVID-19 at 11 hospitals in Korea from July 1, 2021 to November 30, 2021 when the delta variant was a dominant strain. Patients' electronic medical records were reviewed to identify clinical characteristics. RESULTS During the study period, 448 patients were enrolled. One hundred and forty-two were aged 50 years or younger (the younger group), while 306 were above 50 years of age (the older group). The most common pre-existing conditions in the younger group were diabetes mellitus and hypertension, and 69.7% of the patients had a body mass index (BMI) > 25 kg/m². Of 142 younger patients, 31 of 142 patients (21.8%, 19 women) did not have these pre-existing conditions. The overall case fatality rate among severity cases was 21.0%, and it differed according to age: 5.6% (n = 8/142) in the younger group, 28.1% in the older group, and 38% in the ≥ 65 years group. Age (odds ratio [OR], 7.902; 95% confidence interval [CI], 2.754-18.181), mechanical ventilation therapy (OR, 17.233; 95% CI, 8.439-35.192), highest creatinine > 1.5 mg/dL (OR, 17.631; 95% CI, 8.321-37.357), and combined blood stream infection (OR, 7.092; 95% CI, 1.061-18.181) were identified as independent predictors of mortality in total patients. Similar patterns were observed in age-specific analyses, but most results were statistically insignificant in multivariate analysis due to the low number of deaths in the younger group. The full vaccination rate was very low among study population (13.6%), and only three patients were fully vaccinated, with none of the patients who died having been fully vaccinated in the younger group. Seven of eight patients who died had a pre-existing condition or were obese (BMI > 25 kg/m²), and the one remaining patient died from a secondary infection. CONCLUSION About 22% of the patients in the young critical group did not have an underlying disease or obesity, but the rate of obesity (BMI > 25 kg/m²) was high, with a fatality rate of 5.6%. The full vaccination rate was extremely low compared to the general population of the same age group, showing that non-vaccination has a grave impact on the progression of COVID-19 to a critical condition. The findings of this study highlight the need for measures to prevent critical progression of COVID-19, such as vaccinations and targeting young adults especially having risk factors.
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Affiliation(s)
- Hye Jin Shi
- Division of Infectious Diseases, Department of Internal Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea
| | - Eliel Nham
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - Bomi Kim
- Division of Infectious Diseases, Department of Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Eun-Jeong Joo
- Division of Infectious Diseases, Department of Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hae Suk Cheong
- Division of Infectious Diseases, Department of Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Shin Hee Hong
- Division of Infectious Diseases, Department of Internal Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea
| | - Miri Hyun
- Department of Infectious Diseases, Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, Korea
| | - Hyun Ah Kim
- Department of Infectious Diseases, Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, Korea
| | - Sukbin Jang
- Division of Infectious Diseases, Department of Medicine, Dankook University School of Medicine, Cheonan, Korea
| | - Ji-Young Rhee
- Division of Infectious Diseases, Department of Medicine, Dankook University School of Medicine, Cheonan, Korea
| | - Jungok Kim
- Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Korea
- Devision of Infectious Diseases, Chungnam National University Sejong Hospital, Sejong, Korea
| | - Sungmin Kim
- Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Korea
- Devision of Infectious Diseases, Chungnam National University Sejong Hospital, Sejong, Korea
| | - Hyun Kyu Cho
- Division of Infectious Diseases, Department of Medicine, Changwon Samsung Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Yu Mi Wi
- Division of Infectious Diseases, Department of Medicine, Changwon Samsung Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Shinhye Cheon
- Division of Infectious Diseases, Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Korea
| | - Yeon-Sook Kim
- Division of Infectious Diseases, Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Korea
| | - Seungjin Lim
- Division of Infectious Diseases, Department of Internal Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Hyeri Seok
- Division of Infectious Diseases, Department of Medicine, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea
| | - Sook In Jung
- Department of Infectious Diseases, Chonnam National University Medical School, Gwangju, Korea.
| | - Joong Sik Eom
- Division of Infectious Diseases, Department of Internal Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea.
| | - Kyong Ran Peck
- Division of Infectious Diseases, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
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