4,554 results on '"SM Kim"'
Search Results
2. Genetic ablation of smooth muscle KIR2.1 is inconsequential to the function of mouse cerebral arteries
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Paulina M Kowalewska, Jacob Fletcher, William F Jackson, Suzanne E Brett, Michelle SM Kim, Galina Yu Mironova, Nadia Haghbin, David M Richter, Nathan R Tykocki, Mark T Nelson, and Donald G Welsh
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Neurology ,Neurology (clinical) ,Cardiology and Cardiovascular Medicine - Abstract
Cerebral blood flow is a finely tuned process dependent on coordinated changes in arterial tone. These changes are strongly tied to smooth muscle membrane potential and inwardly rectifying K+ (KIR) channels are thought to be a key determinant. To elucidate the role of KIR2.1 in cerebral arterial tone development, this study examined the electrical and functional properties of cells, vessels and living tissue from tamoxifen-induced smooth muscle cell (SMC)-specific KIR2.1 knockout mice. Patch-clamp electrophysiology revealed a robust Ba2+-sensitive inwardly rectifying K+ current in cerebral arterial myocytes irrespective of KIR2.1 knockout. Immunolabeling clarified that KIR2.1 expression was low in SMCs while KIR2.2 labeling was remarkably abundant at the membrane. In alignment with these observations, pressure myography revealed that the myogenic response and K+-induced dilation were intact in cerebral arteries post knockout. At the whole organ level, this translated to a maintenance of brain perfusion in SMC KIR2.1−/− mice, as assessed with arterial spin-labeling MRI. We confirmed these findings in superior epigastric arteries and implicated KIR2.2 as more functionally relevant in SMCs. Together, these results suggest that subunits other than KIR2.1 play a significant role in setting native current in SMCs and driving arterial tone.
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- 2022
3. CHARACTERISTICS OF PATIENTS WITH UPPER GASTROINTESTINAL BLEEDING WITH ANTI-COAGULATION AGENT; FOCUSING ON REBLEEDING
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SM Kim, CH Yang, WS Kim, SH Kim, SW Lee, Ay Yoo, HJ Chun, and JJ Park
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medicine.medical_specialty ,business.industry ,Internal medicine ,medicine ,Anti coagulation ,Upper gastrointestinal bleeding ,medicine.disease ,business ,Gastroenterology - Published
- 2020
4. CLINICOPATHOLOGICAL FEATURES OF SMALL BOWEL MALIGNANCIES DIAGNOSED BY VIDEO CAPSULE ENDOSCOPY AND BALLOON-ASSISTED ENTEROSCOPY: A SINGLE CENTER EXPERIENCE
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HJ Chun, BJ Lee, CH Yang, SH Kim, Ay Yoo, WS Kim, JJ Park, SM Kim, and SW Lee
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Video capsule endoscopy ,medicine.medical_specialty ,Balloon assisted enteroscopy ,business.industry ,medicine ,Clinicopathological features ,Radiology ,Single Center ,business - Published
- 2020
5. CLINICAL OUTCOMES OF PATIENTS WITH ENDOSCOPIC SUBMUCOSAL DISSECTION OF EGC WITH UNDIFFERENTIATED TYPE HISTOLOGY
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WS Kim, Ay Yoo, HJ Chun, SM Kim, CH Yang, SH Kim, JJ Park, and SW Lee
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medicine.medical_specialty ,business.industry ,Medicine ,Histology ,Endoscopic submucosal dissection ,Radiology ,business - Published
- 2020
6. EP880 Analysis of oncologic and reproductive outcomes after fertility-sparing surgery in young women with malignant ovarian germ cell tumor
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SM Kim and UC Ju
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Gynecology ,medicine.medical_specialty ,Pregnancy ,business.industry ,Choriocarcinoma ,Ovary ,medicine.disease ,Endodermal sinus tumor ,medicine.anatomical_structure ,Malignant Ovarian Germ Cell Tumor ,medicine ,Dysgerminoma ,Immature teratoma ,business ,Live birth - Abstract
Introduction/Background The aim of this study was to evaluate the oncologic and reproductive outcomes after fertility-sparing surgery (FSS) in young women with malignant ovarian germ cell tumor (MOGCT). Methodology The medical records of women aged under 40 years with MOGCT who underwent surgery at our institution between July 2002 and December 2017 were retrospectively reviewed. FSS was defined as the preservation of the uterus and at least one adnexa. Results A total of 44 patients who underwent FSS were included. The median age of patients was 23 years (range, 7–39 years). There were 20 patients (45.5%) with immature teratoma, 13 (29.5%) with dysgerminoma, 6 (13.5%) with endodermal sinus tumor, 3 (6.8%) with mixed germ cell tumor, 1 with choriocarcinoma, and 1 with embryonal carcinoma. 29 patients (65.9%) received postoperative chemotherapy with bleomycin, etoposide, and cisplatin (BEP). During a median follow-up period of 62.5 months (range, 7–185), only 4 patients (9.1%) had a recurrence. Notably, all of 2 patients with dysgerminoma had recurrence at para-aortic lymph nodes and all of 2 patients with grade-2 immature teratoma had recurrence at contralateral ovary. Of 14 women desiring pregnancy, 12 achieved term delivery of 12 singleton pregnancies. The pregnancy rate was 85.7% and the live birth rate was 100%. Conclusion Fertility-sparing surgery is an acceptable option for young patients with MOGCT who wish to preserve their fertility, provided they are willing to undergo a prolonged follow up. Reproductive outcomes are assuring to them. Disclosure Nothing to disclose.
- Published
- 2019
7. Rapid Fire Abstract: Multimodality imaging valvular heart disease742Quantification of aortic regurgitation by pulsed Doppler examination of the left subclavian artery velocity contour: a validation study with cardiac magnetic resonance imaging743Diastolic retrograde flow in the descending aorta by cardiovascular magnetic resonance imaging for the quantification of aortic regurgitation744Native T1 relaxation time can accurately identify limited left ventricular contractile reserve in patients with aortic stenosis745The validation and assessment of myocardial fibrosis by using cardiac magnetic resonance and speckle-tracking echocardiography in severe aortic stenosis746Clinical validation of a semi-automatic quantification score of aortic valve calcification with ultrasound747A comparison among conventional 3D-transesophageal echocardiography manual analysis, 3D automatic software analysis and computed tomography for the aortic annulus sizing in TAVI patients748New insights from a multimodality imaging evaluation of LV remodeling in patients with chronic ischemic mitral regurgitation: a combined magnetic resonance and speckle tracking analysis749Multimodality imaging monitoring during percutaneous tricuspid valve repair procedures
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F. Ancona, C. Zito, L. Italia, K. Gillis, SW. Cho, T. Ondrus, A. Kammerlander, RA. Spampinato, C. Jahnke, I. Paetsch, S. Hilbert, V. Schloma, Y. Dmitrieva, E. Strotdrees, G. Hindricks, FW. Mohr, M. Wiesinger, F. Duca, S. Aschauer, C. Zotter-Tufaro, ML. Schwaiger, BA. Marzluf, PE. Bartko, D. Bonderman, J. Mascherbauer, DC. Mirica, M. Kotrc, R. Kockova, G. Van Camp, Y. Mo, A. Praveckova, M. Penicka, SJ. Park, SM. Kim, JW. Hwang, SA. Chang, DS. Jeong, SC. Lee, SW. Park, YH. Choe, PW. Park, G. Bala, B. Roosens, S. Hernot, I. Remory, S. Droogmans, B. Cosyns, G. Geremia, S. Stella, C. Marini, I. Rosa, A. Latib, M. Montorfano, A. Colombo, A. Margonato, E. Agricola, A. Bracco, E. Baldi, G. Di Bella, M. Cusma Piccione, D. Di Nunzio, R. Donato, R. Manganaro, A. Terrizzi, F. Pizzino, ML. Carerj, L. Rivetti, R. Bitto, M. Sergi, S. Carerj, M. Spartera, P. Denti, R. Hahn, and O. Alfieri
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Radiology, Nuclear Medicine and imaging ,General Medicine ,Cardiology and Cardiovascular Medicine - Published
- 2016
8. Effect of Fasting Serum Glucose Change on The Risk of Cardiovascular Disease in Men Without Type2 Diabetes
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SM Kim, J Yun, Sung-Mo Choi, Sang Min Park, Sook Hyang Jeong, G Lee, K.-W. Kim, and JS Son
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medicine.medical_specialty ,Endocrinology ,Serum glucose ,business.industry ,Health Policy ,Diabetes mellitus ,Internal medicine ,Public Health, Environmental and Occupational Health ,medicine ,Disease ,medicine.disease ,business - Published
- 2018
9. Abstract P2-18-04: No further axillary dissection in sentinel lymph node-negative breast cancer after neoadjuvant chemotherapy in patients with initial cytologically-proven axillary node metastasis
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HC Lee, JH Lee, MK Kim, WH Kil, J Kim, JE Lee, SW Kim, SJ Nam, SM Kim, SY Bae, and SK Lee
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Cancer Research ,medicine.medical_specialty ,medicine.diagnostic_test ,Axillary lymph nodes ,business.industry ,Sentinel lymph node ,Axillary Lymph Node Dissection ,Cancer ,medicine.disease ,Metastasis ,Surgery ,Fine-needle aspiration ,medicine.anatomical_structure ,Breast cancer ,Oncology ,medicine ,Lymph ,business - Abstract
Background In patients with fine needle aspiration (FNA)-proven axillary lymph node metastasis at diagnosis (cN+), the current standard surgical procedure is axillary lymph node dissection (ALND) at definitive surgery after neoadjuvant chemotherapy (NAC). However, growing evidences suggest that SLNB after NAC is feasible and may demonstrate acceptable performance in selected patients. We performed sentinel lymph node biopsy in patients treated with cytologically-confirmed axillary lymph nodes metastases at presentation, who converted to a clinically negative axillary status after NAC (ycN0). Patients and methods We retrospectively evaluated 240 patients with invasive breast cancer with ultrasound-guided FNA-proven axillary nodal metastases at the time of diagnosis. All patients received NAC and underwent surgery at Samsung medical center between October 2007 and May 2013. Among these patients, 75 patients underwent SLNB. These patients converted to clinically node-negative disease (ycN0) after NAC on breast MRI or PET/CT scan. A combined detection technique was used with radioisotope and blue dye for the detection of SLN. Patients with negative SLN on frozen pathology and low clinical suspicion of metastasis during operation were not performed further ALND. Results The detection rate of SLNB was 93.3% (70/75), and median number of retrieved sentinel lymph nodes was 3.0 (range 1-8). False negative rate was 6.7% (1/15). Of these 75 patients, 35 (46.6%) patients had positive sentinel lymph nodes (ypN+) and underwent ALND. Thirty-five (46.6%) patients had tumor-free sentinel lymph nodes (ypN0sn) and 20 patients of them were followed without subsequent ALND. In these SLN-negative patients without further ALND, 9 patients were HER2-enriched subtypes and 9 patients, TNBC subtypes. Only two of them were Luminal B subtypes. The median follow-up period was 12.0 months (range 0-26 months) with 2 events; 1 regional recurrence in ipsilateral supraclavicular node and 1 systemic recurrence in brain on postoperative 7 months and 5 months, respectively. There has not occurred an ipsilateral axillary recurrence so far. Conclusions Although the follow-up was not long enough to conclude, this study tried to demonstrate that SLNB after NAC was feasible and further ALND may not be necessary in patients with SLN-negative disease (ypN0sn). Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P2-18-04.
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- 2013
10. Cholesterol granuloma in the wall of a mandibular dentigerous cyst: a rare case report
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JH. Lee, MS. Alrashdan, KM. Ahn, MH. Kang, SP. Hong, and SM. Kim
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Fibular flap ,Mastoid process ,medicine.medical_specialty ,Pathology ,business.industry ,medicine.disease ,Dentigerous cyst ,Surgery ,Cholesterol granuloma ,medicine.anatomical_structure ,Paranasal sinuses ,Hemimandibulectomy ,hemic and lymphatic diseases ,Rare case ,Middle ear ,medicine ,lipids (amino acids, peptides, and proteins) ,business ,General Dentistry - Abstract
Cholesterol granuloma is an inflammatory reaction to cholesterol crystals deposition. It may develop in a variety of sites including the middle ear, mastoid process or even paranasal sinuses. Very few cases of cholesterol granuloma occurring in the jaws were reported. This report presents a rare case of cholesterol granuloma that developed in the wall of a large mandibular dentigerous cyst. The condition was treated with hemimandibulectomy followed by reconstruction with a free fibular flap.
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- 2010
11. Clinical manifestations of reticular pseudodrusen in Korean patients
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My Lee, Sm Kim, and Di Ham
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medicine.medical_specialty ,genetic structures ,business.industry ,General Medicine ,Clinical manifestation ,Consecutive case series ,Fundus (eye) ,Macular degeneration ,medicine.disease ,Occult ,eye diseases ,Surgery ,Geographic atrophy ,Ophthalmology ,Reticular pseudodrusen ,Choroidal neovascularization ,medicine ,sense organs ,medicine.symptom ,business - Abstract
Purpose To clarify the clinical characteristics of reticular pseudodrusen(RPD) in Korean patients. Methods The study was designed as retrospective, observational, consecutive case series. A total of 255 eyes of 130 patients diagnosed with RPD were evaluated. RPD were diagnosed by characteristic fundus findings, using multimodal imaging tests. Age related macular degeneration(AMD) was determined by the International Classification and Grading System. Results The mean age of the patients was 72.6±9.0 years(range, 43-92). Most of the RPD patients had the disease in both eyes(97.7%), with a female preponderance(86.2%). All of the 3 patients with unilateral RPD had shown neovascular AMD in the eye without RPD. AMD was found in 183 eyes(71.8%); early AMD in 115 eyes(45.1%), geographic atrophy(GA) in 41 eyes(16.1%), and neovasuclar AMD in 27 eyes(10.6%). The mean age was 73.7±9.2 years(range, 58-92) in the RPD group and 69.9±11.7 years(range, 43-90) in the control group repectively, and there was a statistically significant difference between these two groups(p
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- 2011
12. PRIMARY LOW-GRADE B CELL LYMPHOMA OF MUCOSA-ASSOCIATED LYMPHOID TISSUE TYPE OF THE COMMON BILE DUCT
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CS Kang, YS Lee, SM Kim, and BK Kim
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Hepatology ,Gastroenterology - Published
- 2001
13. Thyroid Volume and Nodularity in Dyslipidemic Patients on Statin Treatment
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JH Suk, MG Chon, KI Cho, HG Lee, SM Kim, MK Kim, and TI Kim
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- 2010
14. Antimelanogenesis effect of Vaccinium uliginosum L. extract on B16F10 melanoma cell and UVB-irradiated C57BL/6 mice
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SM Kim and SY Choung
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Pharmacology ,C57BL/6 ,biology ,Traditional medicine ,business.industry ,Organic Chemistry ,Cell ,Vaccinium uliginosum ,Pharmaceutical Science ,biology.organism_classification ,Analytical Chemistry ,medicine.anatomical_structure ,Complementary and alternative medicine ,Drug Discovery ,medicine ,Molecular Medicine ,B16f10 melanoma ,business - Published
- 2009
15. Neuronal Polarity
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Joanne SM Kim and Mei Zhen
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- 2008
16. A chemical-genetic strategy reveals distinct temporal requirements for SAD-1 kinase in neuronal polarization and synapse formation
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Brendan N. Lilley, Kevan M. Shokat, Chao Zhang, Mei Zhen, Joshua R. Sanes, and Joanne Sm Kim
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Enzymologic ,Medical and Health Sciences ,lcsh:RC346-429 ,Serine ,0302 clinical medicine ,Cell polarity ,Site-Directed ,Developmental ,Caenorhabditis elegans ,Neurons ,0303 health sciences ,Kinase ,Intracellular Signaling Peptides and Proteins ,Gene Expression Regulation, Developmental ,Cell Polarity ,Biological Sciences ,Protein-Serine-Threonine Kinases ,Phenotype ,Cell biology ,Neurological ,Drug ,Research Article ,1.1 Normal biological development and functioning ,Protein Serine-Threonine Kinases ,Biology ,behavioral disciplines and activities ,Gene Expression Regulation, Enzymologic ,Dose-Response Relationship ,03 medical and health sciences ,Enzyme activator ,Developmental Neuroscience ,Underpinning research ,mental disorders ,Genetics ,Animals ,Kinase activity ,lcsh:Neurology. Diseases of the nervous system ,030304 developmental biology ,Dose-Response Relationship, Drug ,Neurosciences ,biology.organism_classification ,Enzyme Activation ,Pyrimidines ,Gene Expression Regulation ,Mutagenesis ,Synapses ,Mutagenesis, Site-Directed ,Pyrazoles ,Developmental biology ,030217 neurology & neurosurgery ,Developmental Biology - Abstract
Background Neurons assemble into a functional network through a sequence of developmental processes including neuronal polarization and synapse formation. In Caenorhabditis elegans, the serine/threonine SAD-1 kinase is essential for proper neuronal polarity and synaptic organization. To determine if SAD-1 activity regulates the establishment or maintenance of these neuronal structures, we examined its temporal requirements using a chemical-genetic method that allows for selective and reversible inactivation of its kinase activity in vivo. Results We generated a PP1 analog-sensitive variant of SAD-1. Through temporal inhibition of SAD-1 kinase activity we show that its activity is required for the establishment of both neuronal polarity and synaptic organization. However, while SAD-1 activity is needed strictly when neurons are polarizing, the temporal requirement for SAD-1 is less stringent in synaptic organization, which can also be re-established during maintenance. Conclusion This study reports the first temporal analysis of a neural kinase activity using the chemical-genetic system. It reveals that neuronal polarity and synaptic organization have distinct temporal requirements for SAD-1.
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- 2008
17. N
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Daniel A. Cohen, David E. Hornung, Lawrence Mays, Rodney Douglas, Henry Kennedy, Kenneth Knoblauch, Kevan Martin, Valery V. Abramov, Irina A. Gontova, Tatjana Ya. Abramova, Vladimir A. Kozlov, Alexander Kusnecov, Karim Benchenane, Michaël Zugaro, Sidney Wiener, Martin Witt, Adonis Moschovakis, Anna Katharina Braun, Shigeru Kuratani, Fujio Murakami, Angela Starkweather, Yannis Dalezios, Kazuyuki Aihara, Masato Okada, Masaharu Adachi, Masataka Watanabe, Uri Rokni, Peter G. Smith, Diethelm W. Richter, Michael Müller, M. Griffiths, J. W Neal, P. Gasque, Rommy von Bernhardi, Gilles J. Guillemin, Ruud M. Buijs, Andries Kalsbeek, Cynthia L. Darlington, Dick F. Swaab, Paul J. Lucassen, Inge Huitinga, Ai-Min Bao, Bernd Ladwig, Frank W. Ohl, Hans-Ulrich Schnitzler, Annette Denzinger, Terry Takahashi, Anne-Kathrin Warzecha, Roland Kern, Koji Oishi, Kazunori Nakajima, Liliana Bernardino, Fabienne Agasse, João O. Malva, Thomas D. Bird, Mariana Alonso, David Dubayle, D. Menetrey, John J. Haddad, Anna Lobell, Philip F. Stahel, Ursula Felderhoff-Mueser, Scott R. Barnum, Mehrnaz Jafarian-Tehrani, Tetsuya Mizuno, W. Dalton Dietrich, Robert W. Keane, Jung-Soo Han, Hassan R. Dhaini, William J. Spain, Nathalie Mandairon, Anne Didier, Mark M. Rich, Yoshihisa Kudo, Araya Ruangkittisakul, Klaus Ballanyi, Naweed I. Syed, Axel Petzold, Jeffrey A. Rumbaugh, Avindra Nath, Håkan Aldskogius, José M. Delgado-García, Mineko Kengaku, Joanne SM Kim, Mei Zhen, Alistair Mathie, Emma L. Veale, Maike Stengel, Ralf Baron, Willis K. Samson, Melissa J. S. Chee, William F. Colmers, Paul F. Smith, Michael Pauen, Stacy L. Elliott, Georg Northoff, René J. Jorna, Kazuhide Inoue, Hiroshi Kawabe, Frederique Varoqueaux, Nils Brose, Kohichi Tanaka, Patrick J. Whelan, Ronald S. Petralia, Robert J. Wenthold, Matt S. Ramer, Lowell T. McPhail, Ian Mullaney, Darius Widera, Christian Kaltschmidt, Barbara Kaltschmidt, Keith R. Pennypacker, Glen Pollock, Samuel Saporta, H. Richard Koerber, Herrmann O. Handwerker, Laura Smale, Antonio A. Nunez, Nahum Shimkin, Frederick W. Tse, Nan Wang, Lei Yan, Amy Tse, Ellen Covey, and R. Alberto Travagli
- Published
- 2008
18. Chapter-62 Long-term Follow-up of Wilms' Tumor
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SM Kim
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Oncology ,medicine.medical_specialty ,business.industry ,Long term follow up ,Internal medicine ,medicine ,Wilms' tumor ,business ,medicine.disease - Published
- 2007
19. A case of bilateral submandibular gland mucoceles in a 16-month-old child
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Jun Hyen Kim, Seoung Geun Kim, Jong Duk Kim, Jun Hyeng Kim, Hye Jung Choi, and SM Kim
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medicine.medical_specialty ,Pathology ,Lower lip ,Mucocele ,Case Report ,Oral cavity ,Pediatrics ,Cystic lesion ,stomatognathic system ,Rare case ,medicine ,Child ,Submandibular gland ,business.industry ,lcsh:RJ1-570 ,lcsh:Pediatrics ,Submandibular triangle ,medicine.disease ,Surgery ,stomatognathic diseases ,medicine.anatomical_structure ,Pediatrics, Perinatology and Child Health ,Differential diagnosis ,business - Abstract
Mucoceles are common benign cystic lesions of the oral cavity that develop following extravasation or retention of mucous material from the major or minor salivary glands. Mucoceles are usually located in the lower lip (60 to 70% of cases), and the floor of the mouth is only involved in 6 to 15% of cases. Submandibular gland mucocele is extremely rare but should be considered in the differential diagnosis of swelling at the submandibular triangle in young children. We present the rare case of a 16-month-old child who was diagnosed with bilateral submandibular gland mucocele, presenting as serial swellings in both submandibular regions. We removed the cystic mass with the submandibular and sublingual glands to prevent recurrence.
- Published
- 2012
20. Energy storage in in vivo synthesizable biominerals
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Jw Ko Jong-Wan Ko, Sw Kim Sung-Wook Kim, Cb Park Chan-Beum Park, Ws Cho Woo-Suk Cho, Ks Kang Ki-Suk Kang, Jk Ryu Jung-Ki Ryu, Sm Kim Sang-Min Kim, and Ky Park Kyu-Young Park
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Materials science ,biology ,In vivo ,General Chemical Engineering ,Energy materials ,Nanotechnology ,General Chemistry ,Glycera ,biology.organism_classification ,Energy storage - Abstract
With the move toward the use of greener materials for powered vehicles, environmentally-benign synthesis of energy materials is becoming important. Here, the energy storage capability of biominerals from the jaws of a marine bloodworm, Glycera dibranchiate, is demonstrated, implying the possibility of a bio-factory (or in vivo synthesis) for energy storage.
- Published
- 2012
21. Convolutional neural network-based classification of craniosynostosis and suture lines from multi-view cranial X-rays.
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Kim SM, Yang JS, Han JW, Koo HI, Roh TH, and Yoon SH
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- Humans, Infant, Deep Learning, Male, Female, X-Rays, Image Processing, Computer-Assisted methods, Skull diagnostic imaging, Craniosynostoses diagnostic imaging, Craniosynostoses classification, Cranial Sutures diagnostic imaging, Neural Networks, Computer
- Abstract
Early and precise diagnosis of craniosynostosis (CSO), which involves premature fusion of cranial sutures in infants, is crucial for effective treatment. Although computed topography offers detailed imaging, its high radiation poses risks, especially to children. Therefore, we propose a deep-learning model for CSO and suture-line classification using 2D cranial X-rays that minimises radiation-exposure risks and offers reliable diagnoses. We used data comprising 1,047 normal and 277 CSO cases from 2006 to 2023. Our approach integrates X-ray-marker removal, head-pose standardisation, skull-cropping, and fine-tuning modules for CSO and suture-line classification using convolution neural networks (CNNs). It enhances the diagnostic accuracy and efficiency of identifying CSO from X-ray images, offering a promising alternative to traditional methods. Four CNN backbones exhibited robust performance, with F1-scores exceeding 0.96 and sensitivity and specificity exceeding 0.9, proving the potential for clinical applications. Additionally, preprocessing strategies further enhanced the accuracy, demonstrating the highest F1-scores, precision, and specificity. A qualitative analysis using gradient-weighted class activation mapping illustrated the focal points of the models. Furthermore, the suture-line classification model distinguishes five suture lines with an accuracy of > 0.9. Thus, the proposed approach can significantly reduce the time and labour required for CSO diagnosis, streamlining its management in clinical settings., (© 2024. The Author(s).)
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- 2024
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22. Atractylodes Lancea and Its Constituent, Atractylodin, Ameliorates Metabolic Dysfunction-Associated Steatotic Liver Disease via AMPK Activation.
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Song GY, Kim SM, Back S, Yang SB, and Yang YM
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Metabolic dysfunction-associated steatotic liver disease (MASLD), which encompasses a spectrum of conditions ranging from simple steatosis to hepatocellular carcinoma, is a growing global health concern associated with insulin resistance. Since there are limited treatment options for MASLD, this study investigated the therapeutic potential of Atractylodes lancea , a traditional herbal remedy for digestive disorders in East Asia, and its principal component, atractylodin, in treating MASLD. Following 8 weeks of high-fat diet (HFD) feeding, mice received oral doses of 30, 60, or 120 mg/kg of Atractylodes lancea . In HFD-fed mice, Atractylodes lancea treatment reduced the body weight; serum triglyceride, total cholesterol, and alanine aminotransferase levels; and hepatic lipid content. Furthermore, Atractylodes lancea significantly ameliorated fasting serum glucose, fasting serum insulin, and homeostatic model assessment of insulin resistance levels in response to HFD. Additionally, a glucose tolerance test demonstrated improved glucose homeostasis. Treatment with 5 or 10 mg/kg atractylodin also resulted in anti-obesity, anti-steatosis, and glucose-lowering effects. Atractylodin treatment resulted in the downregulation of key lipogenic genes ( Srebf1 , Fasn , Scd2 , and Dgat2 ) and the upregulation of genes regulated by peroxisome proliferator-activated receptor-α. Notably, the molecular docking model suggested a robust binding affinity between atractylodin and AMP-activated protein kinase (AMPK). Atractylodin activated AMPK, which contributed to SREBP1c regulation. In conclusion, our results revealed that Atractylodes lancea and atractylodin activated the AMPK signaling pathway, leading to improvements in HFD-induced obesity, fatty liver, and glucose intolerance. This study suggests that the phytochemical, atractylodin, can be a treatment option for MASLD.
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- 2024
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23. Validation of the efficacy of a personalized information-provision and exercise-coaching app on the quality of life of menopausal women.
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Kim NY, Kim DS, Han DH, Hong JS, Shim Y, Yoon YJ, Kim HJ, and Kim SM
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- Humans, Female, Middle Aged, Surveys and Questionnaires, Exercise, Republic of Korea, Quality of Life, Menopause psychology, Mobile Applications
- Abstract
Objectives: Menopausal symptoms severely impact women's quality of life (QoL). Digital health interventions provide an accessible, personalized alternative for managing menopausal symptoms. In this study, we validated the Menopause Assistant Manager (MAMA®; Hudit, Seoul, S. Korea) app developed to provide personalized information, exercise coaching, and management of appointments and medications to menopausal women, and evaluated its efficacy on their QoL., Study Design: This nonrandomized interventional trial enrolled 48 peri- and postmenopausal women into experimental (MAMA) and control (Waitlist) groups (n = 24 each). Participants in the MAMA group used the app for 8 weeks, whereas the Waitlist group received no intervention. Both groups continued their usual treatments., Main Outcome Measures: Clinical assessments at baseline and study completion included the World Health Organization Quality of Life Brief Version (WHOQOL-BREF), Menopause Rating Scale, Patient Health Questionnaire-9, Generalized Anxiety Disorder-7 (GAD-7), Patient Health Questionnaire-15 (PHQ-15), Menopause Emotional Symptom Questionnaire, and Subjective Memory Complaints Questionnaire., Results: Compared with the Waitlist group, the MAMA group showed postintervention improvements in WHOQOL-BREF physical health (F = 4.84, P = .03) and environmental (F = 5.01, P = .03) domains and GAD-7 (F = 5.53, P = .02) and PHQ-15 (F = 4.14, P = .048) scores. Changes in WHOQOL-BREF physical health scores negatively correlated with PHQ-15 scores (ρ = -0.53, P = .004)., Conclusion: By increasing treatment accessibility, the app improved physical and environmental QoL and reduced anxiety and somatic symptoms. App-based exercise coaching alleviated somatic symptoms, and the in-app psychological content reduced anxiety by normalizing menopausal symptoms, providing accurate information, decreasing uncertainty, and improving symptom perception., Trial Registration: Clinical Research Information Service KCT 0008603; https://cris.nih.go.kr/cris/search/detailSearch.do?seq=25078&status=5&seq_group=25078&search_page=M., Competing Interests: Declaration of competing interest The authors declare that they have no competing interest., (Copyright © 2024 Elsevier B.V. All rights reserved.)
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- 2024
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24. A Simple Scoring System for Identifying Favorable Neurologic Outcomes Among Out-of-Hospital Cardiac Arrest Patients With Asystole.
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Park H, Kim SM, Kwon H, Kim D, Kim YJ, and Kim WY
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- Humans, Male, Female, Middle Aged, Aged, Cardiopulmonary Resuscitation methods, Adult, Return of Spontaneous Circulation, Retrospective Studies, Aged, 80 and over, Out-of-Hospital Cardiac Arrest therapy, Out-of-Hospital Cardiac Arrest mortality
- Abstract
Study Objective: Asystole is the most common initial rhythm in out-of-hospital cardiac arrest (OHCA) but indicates a low likelihood of neurologic recovery. This study aimed to develop a novel scoring system to be easily applied at the time of emergency department arrival for identifying favorable neurologic outcomes in OHCA survivors with an asystole rhythm., Methods: This study is a secondary analysis based on a previously collected nationwide database, targeting nontraumatic adult OHCA patients aged ≥18 years with an asystole rhythm who achieved return of spontaneous circulation (ROSC) between January 2016 and December 2020. The primary outcome was a favorable neurologic outcome defined as Cerebral Performance Categories scores of 1 or 2 at hospital discharge. A prediction model was developed through multivariable logistic regression analysis in a derivation cohort in the form of a scoring system (WBC-ASystole). The performance and calibration of the model were tested using an internal validation cohort., Results: Among 19,803 OHCA patients with survival to hospital admission, 6,322 had asystole, and 285 (4.5%) achieved good neurologic outcomes. Factors associated with favorable outcomes included age, witness arrest, bystander cardiopulmonary resuscitation, time from call to hospital arrival, and out-of-hospital ROSC achievement. The WBC-ASystole score, totaling 11 points, exhibited a predictive performance with an area under the receiver operating characteristic curve of 0.80 (95% confidence interval [CI] 0.76 to 0.83) and 0.79 (95% CI 0.74 to 0.83) in the derivation and validation cohorts, respectively. After categorizing patients into 3 groups based on probability for good neurologic outcomes, the sensitivity and specificity were as follows: 0.98 (95% CI 0.97 to 0.99) and 0.09 (95% CI 0.09 to 0.10) for the very low predicted probability group (WBC-ASystole ≤2), 0.85 (95% CI 0.82 to 0.89) and 0.54 (95% CI 0.53 to 0.55) for the low predicted probability group (WBC-ASystole 3 to 4), and 0.36 (95% CI 0.34 to 0.39) and 0.93 (95% CI 0.92 to 0.93) for fair predicted probability group (WBC-ASystole≥5), respectively., Conclusions: Although external validation studies must be performed, among OHCA patients with asystole, the WBC-ASystole scoring system may identify those patients who are likely to have a favorable neurologic outcome., (Copyright © 2024 American College of Emergency Physicians. Published by Elsevier Inc. All rights reserved.)
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- 2024
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25. Efficacy of cognitive behavioral therapy for menopausal symptoms and quality of life in Korean perimenopausal women: A pilot randomized controlled trial.
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Kim DS, Kim NY, Han DH, Kim HJ, Yu ES, and Kim SM
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- Humans, Female, Middle Aged, Republic of Korea, Pilot Projects, Surveys and Questionnaires, Menopause psychology, Hot Flashes therapy, Hot Flashes psychology, Treatment Outcome, Adult, Anxiety therapy, Depression therapy, Quality of Life, Cognitive Behavioral Therapy methods, Perimenopause psychology
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Objectives: Therapeutic interventions are crucial for perimenopausal women, given the challenging physical and psychological symptoms they face. This study focused on the development and verification of the efficacy of a cognitive behavioral therapy (CBT) protocol designed specifically for Korean perimenopausal women., Study Design: A CBT protocol for perimenopausal women was newly developed based on theory and evidence. Forty menopausal women were randomly assigned to either the CBT group (n = 19) or treatment-as-usual (TAU) group (n = 21). Participants in the CBT group underwent 60-min weekly sessions for eight weeks. The TAU group received standard care from gynecologists., Main Outcome Measures: At baseline and follow-up, participants completed the Menopausal Rating Scale (MRS), World Health Organization Quality of Life Brief Version (WHOQOL-BREF), Patient Health Questionnaire-9, Generalized Anxiety Disorder-7 (GAD-7), Patient Health Questionnaire-15 (PHQ-15), Menopause Emotional Symptom Questionnaire (MESQ), and Subjective Memory Complaints Questionnaire., Results: The CBT group showed significant changes in their MRS (F = 4.18, p = .048), WHOQOL-BREF (7.60, 0.009), GAD-7 (4.61, 0.038), PHQ-15 (5.49, 0.025), and MESQ scores (7.19, 0.011) compared to the TAU group. In the CBT group, changes in GAD-7 scores were correlated with PHQ-15 (ρ = 0.57, p < .05), MESQ (0.57, < 0.05), and WHOQOL-BREF scores (-0.53, < 0.05)., Conclusion: CBT prevents the worsening of menopausal and emotional symptoms, anxiety, and quality of life. CBT may have had a therapeutic effect through the following mechanisms: managing anxiety by changing perceptions of menopause through education and training for coping with various menopausal symptoms and improving self-efficacy in symptom management., Clinical Trial Registration Number: KCT0007517., Competing Interests: Declaration of competing interest The authors declare that they have no competing interest., (Copyright © 2024 Elsevier B.V. All rights reserved.)
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- 2024
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26. Rab11 suppresses neuronal stress signaling by localizing dual leucine zipper kinase to axon terminals for protein turnover.
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Kim SM, Quagraine Y, Singh M, and Kim JH
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- Animals, Stress, Physiological, Sensory Receptor Cells metabolism, MAP Kinase Kinase Kinases metabolism, MAP Kinase Kinase Kinases genetics, Drosophila melanogaster metabolism, Drosophila melanogaster genetics, Presynaptic Terminals metabolism, Lipoylation, Drosophila Proteins metabolism, Drosophila Proteins genetics, rab GTP-Binding Proteins metabolism, rab GTP-Binding Proteins genetics, Signal Transduction
- Abstract
Dual leucine zipper kinase (DLK) mediates multiple neuronal stress responses, and its expression levels are constantly suppressed to prevent excessive stress signaling. We found that Wallenda (Wnd), the Drosophila ortholog of DLK, is highly enriched in the axon terminals of Drosophila sensory neurons in vivo and that this subcellular localization is necessary for Highwire-mediated Wnd protein turnover under normal conditions. Our structure-function analysis found that Wnd palmitoylation is essential for its axon terminal localization. Palmitoylation-defective Wnd accumulated in neuronal cell bodies, exhibited dramatically increased protein expression levels, and triggered excessive neuronal stress responses. Defective intracellular transport is implicated in neurodegenerative conditions. Comprehensive dominant-negative Rab protein screening identified Rab11 as an essential factor for Wnd localization in axon terminals. Consequently, Rab11 loss-of-function increased the protein levels of Wnd and induced neuronal stress responses. Inhibiting Wnd activity significantly ameliorated neuronal loss and c-Jun N-terminal kinase signaling triggered by Rab11 loss-of-function. Taken together, these suggest that DLK proteins are constantly transported to axon terminals for protein turnover and a failure of such transport can lead to neuronal loss. Our study demonstrates how subcellular protein localization is coupled to protein turnover for neuronal stress signaling., Competing Interests: SK, YQ, MS, JK No competing interests declared, (© 2024, Kim et al.)
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- 2024
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27. Changes in physical activity and all-cause mortality among individuals with dementia: a cohort study using the National Health Insurance Service Database in Korea.
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Park KY, Huh Y, Nam GE, Han K, Jung JH, Cho YJ, Kim SM, Hwang HS, and Park YM
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Objective: To examine associations between the amount and changes in regular physical activity (PA) before and after diagnosis of dementia and all-cause mortality risk, and whether these associations differ by PA intensity (light, moderate or vigorous)., Methods: This retrospective cohort study used data from the Korean National Health Insurance Service Database, including 60 252 individuals newly diagnosed with dementia between 2010 and 2016 who underwent health examinations both before and after diagnosis. PA was assessed using the International Physical Activity Questionnaire-Short Form. Multivariable Cox proportional hazards regression models were used to analyse the associations between PA (amount and changes) and all-cause mortality risk., Results: During a mean follow-up of 3.7 years, 16 431 (27.3%) deaths occurred. Higher PA levels after dementia diagnosis were associated with a dose-dependent decrease in mortality risk (p for trend <0.001). Maintaining regular PA, compared with remaining inactive, was associated with the lowest mortality risk (HR=0.71, 95% CI 0.65 to 0.79). Sustained engagement in PA of any intensity was associated with decreased mortality risk: light (HR=0.70, 95% CI 0.67 to 0.75), moderate (HR=0.74, 95% CI 0.64 to 0.86) and vigorous PA (HR=0.70, 95% CI 0.61 to 0.79). Initiating any PA intensity after dementia diagnosis was associated with at least 20% reduced mortality risk. These associations were consistent in Alzheimer's disease., Conclusions: Maintaining or initiating regular PA, regardless of intensity, after dementia diagnosis was associated with a reduced risk of all-cause mortality. Lifestyle modifications promoting PA might offer survival benefits for individuals with dementia., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2024
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28. Sustainable Development Goals for Cleft Care.
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Mustakim KR, Eo MY, Mustakim IG, and Kim SM
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The sustainable development goals (SDGs) are a blueprint for a better and more sustainable future for all. Understanding these initiatives helps everyone develop insights into critical global issues, including health care management, education, gender equality, and other challenges related to the 17 SDGs. Implementing these goals will contribute to sustainable development for cleft care in the least developed countries. The authors critically reviewed relevant articles on cleft lip and palate from 2014 to 2022. The authors' review utilized the online search tools Springer Nature, PubMed, and Google Scholar, using keywords of "cleft lip and palate," "cleft outreach program," "sustainable cleft care," "sustainable development goals for cleft," and "sustainable outreach program." In addition, the authors investigated the potentially necessary SDGs for sustainable cleft care management., Competing Interests: The authors report no conflicts of interest., (Copyright © 2024 by Mutaz B. Habal, MD.)
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- 2024
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29. A Discourse Analysis of Cultural Influences on Alaska Native Successful Aging.
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Kim SM, Lewis JP, Bacsu JD, Southerland JL, and Smith ML
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Geographical remoteness, limited resources, and socioeconomic disparities contribute to the migration of rural Alaska Native Elders to urban areas to access medical services and resources, improve economic situations, or reunite with family. We compared the discourse of 12 Elders in Anchorage who previously lived in four remote traditional villages in the Norton Sound region (ages 60-84) and 13 Elders in those villages (ages 48-80). Using Gee's discourse analysis framework, two patterns emerged detailing cultural effects on identity and Eldership, illuminating differences in the self-evaluation of successful aging based on cultural influences and the role of contextual factors.
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- 2024
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30. Effects of SPAD value variations according to nitrogen application levels on rice yield and its components.
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Kim TH and Kim SM
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Nitrogen (N) is the most essential element for growth, development, and grain yield determination in crops. However, excessive nitrogen application can result in environmental pollution and greenhouse gas emissions that contribute to climate change. In this study, we used 158 rice genetic resources to evaluate the relationships between the soil and plant analysis development (SPAD) value and grain yield (GY) and its components. The SPAD value ranged between 30.5 and 55.8, with a mean of 41.7 ± 5.3, under normal nitrogen conditions (NN, 9 kg/10a), and between 27.5 and 52.3, with a mean of 38.6 ± 4.8, under low nitrogen conditions (LN, 4.5 kg/10a). Under NN conditions, the SPAD values were in the following order: japonica (43.5 ± 5.8), Tongil -type (41.7 ± 2.5), others (41.7 ± 5.2), and indica (38.3 ± 3.8). By contrast, under LN conditions, the SPAD values were in the following order: Tongil -type (40.4 ± 2.1), others (40.1 ± 4.5), japonica (39.6 ± 5.2), and indica (35.6 ± 3.9). The 158 genetic resources showed no correlation between SPAD and yield. Therefore, the low-decrease rate (LDR) and high-decrease rate (HDR) SPAD groups were selected to reanalyze the relationships between the surveyed traits. The SPAD values were positively correlated with 1000-grain weight (TGW) for both LDR and HDR groups (NN: 0.63, LN: 0.53), However, SPAD and GY were positively correlated only in the LDR group. For TGW, the coefficient of determination ( R
2 ) was 20% and 13% under NN and LN conditions, respectively. For GY, R2 values of 32% and 52% were observed under NN and LN conditions, respectively. Genetic resources with higher SPAD values in the LDR group exhibited the highest yield (NN: 1.19 kg/m2 , LN: 1.04 kg/m2 ) under both NN and LN conditions. In conclusion, we selected 10 genetic resources that exhibited higher GY under both NN and LN conditions with minimal yield reductions. These genetic resources represent valuable breeding materials for nitrogen deficiency adaptation., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Kim and Kim.)- Published
- 2024
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31. Characterization and Antibacterial Activity of Silver Nanoparticles Synthesized from Oxya chinensis sinuosa (Grasshopper) Extract.
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Kim SM, Kim TY, Choi YS, Ok G, and Lim MC
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In this study, silver nanoparticles (AgNPs) were synthesized using a green method from an extract of the edible insect Oxya chinensis sinuosa (O_extract). The formation of AgNPs (O_AgNPs) was confirmed via UV-vis spectroscopy, and their stability was assessed using Turbiscan analysis. The size and morphology of the synthesized particles were characterized using transmission electron microscopy and field-emission scanning electron microscopy. Dynamic light scattering and zeta potential analyses further confirmed the size distribution and dispersion stability of the particles. The average particle size was 111.8 ± 1.5 nm, indicating relatively high stability. The synthesized O_AgNPs were further characterized using X-ray photoelectron spectroscopy (XPS), high-resolution X-ray diffraction (HR-XRD), and Fourier transform infrared (FTIR) spectroscopy. XPS analysis confirmed the chemical composition of the O_AgNP surface, whereas HR-XRD confirmed its crystallinity. FTIR analysis suggested that the O_extract plays a crucial role in the synthesis process. The antibacterial activity of the O_AgNPs was demonstrated using a disk diffusion assay, which revealed effective activity against common foodborne pathogens, including Salmonella Typhimurium, Escherichia coli , Staphylococcus aureus , and Bacillus cereus . O_AgNPs exhibited clear antibacterial activity, with inhibition zones of 15.08 ± 0.45 mm for S . Typhimurium, 15.03 ± 0.15 mm for E. coli , 15.24 ± 0.66 mm for S. aureus , and 13.30 ± 0.16 mm for B. cereus . These findings suggest that the O_AgNPs synthesized from the O_extract have potential for use as antibacterial agents against foodborne bacteria.
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- 2024
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32. Demonstration of Steep Switching Behavior Based on Band Modulation in WSe 2 Feedback Field-Effect Transistor.
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Kim SM, Jun JH, Lee J, Taqi M, Shin H, Lee S, Lee H, Yoo WJ, and Lee BH
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Feedback field-effect transistors (FBFETs) have been studied to obtain near-zero subthreshold swings at 300 K with a high on/off current ratio ~10
10 . However, their structural complexity, such as an epitaxy process after an etch process for a Si channel with a thickness of several nanometers, has limited broader research. We demonstrated a FBFET using in-plane WSe2 p-n homojunction. The WSe2 FBFET exhibited a minimum subthreshold swing of 153 mV/dec with 30 nm gate dielectric. Our modeling-based projection indicates that the swing of this device can be reduced to 14 mV/dec with 1 nm EOT. Also, the gain of the inverter using the WSe2 FBFET can be improved by up to 1.53 times compared to a silicon CMOS inverter, and power consumption can be reduced by up to 11.9%.- Published
- 2024
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33. Poly(β-amino ester) polymer library with monomer variation for mRNA delivery.
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Kim HL, Saravanakumar G, Lee S, Jang S, Kang S, Park M, Sobha S, Park SH, Kim SM, Lee JA, Shin E, Kim YJ, Jeong HS, Kim D, and Kim WJ
- Abstract
Non-viral vectors for mRNA delivery primarily include lipid nanoparticles (LNPs) and polymers. While LNPs are known for their high mRNA delivery efficiency, they can induce excessive immune responses and cause off-target effects, potentially leading to side effects. In this study, we aimed to explore polymer-based mRNA delivery systems as a viable alternative to LNPs, focusing on their mRNA delivery efficiency and potential application in mRNA vaccines. We created a library of poly(β-amino ester) (PBAE) polymers by combining various amine monomers and acrylate monomers. Through screening this polymer library, we identified specific polymer nanoparticles (PNPs) that demonstrated high mRNA expression efficiency, with sustained mRNA expression for up to two weeks. Furthermore, the PNPs showed mRNA expression only at the injection site and did not exhibit liver toxicity. Additionally, when assessing immune activation, the PNPs significantly induced T-cell immune activation and were effective in the plaque reduction neutralization test. These results suggest that polymer-based mRNA delivery systems not only hold potential for use in mRNA vaccines but also show promise for therapeutic applications., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)
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- 2024
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34. Social isolation and loneliness prevention among rural older adults aging-in-place: a needs assessment.
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Southerland JL, Zheng S, Dodson K, Mauck E, Bacsu JR, Brown MJ, Holloway J, Kim SM, Malatyali A, and Smith ML
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- Humans, Aged, Female, Male, Middle Aged, Tennessee, Independent Living, Surveys and Questionnaires, Loneliness psychology, Social Isolation psychology, Rural Population statistics & numerical data, Needs Assessment
- Abstract
Introduction: The adverse effects of social isolation and loneliness (SI/L) have been documented among older adults in rural communities and contribute to poor health outcomes, premature disability and mortality, and increased burden on the healthcare system. The identification of factors contributing to SI/L among older adults can build the foundation for rural policymakers and leaders to allocate resources and develop tailored strategies more efficiently. The purpose of this article is to describe findings from a needs assessment designed to understand local factors that contribute to SI/L among rural older adults in a county in Northeast Tennessee. Findings from the needs assessment will be used by local stakeholders to develop strategies to promote age-friendly initiatives., Methods: Eighty-two older adults [ages 62 to 74 years (59%); non-Hispanic white (95%); female (71%)] from three senior apartment complexes in a Northeast Tennessee county completed an 87-item needs assessment survey. The evaluation of social isolation utilized Lubben's 6-item Social Network Scale, while loneliness was assessed using the 3-item UCLA Loneliness Scale. Logistic regression analysis was used to identify predictors of SI/L. Given the limited sample size, statistical significance was considered at p < 0.10., Results: The prevalence of social isolation and loneliness was 42% and 37%, respectively. Residing in the county <5 years [Adjusted OR (AOR): 3.35; 95% CI: 1.04-10.81; p = 0.04] and reporting resource-related barriers to aging-in-place (AOR: 6.56; 95% CI: 2.00-21.57; p = 0.004) were associated with increases in the odds of social isolation; whereas interest in intergenerational activities decreased the odds of social isolation (AOR: 0.19; 95% CI: 0.05-0.69; p = 0.01). Boredom (AOR: 4.06; 95% CI: 1.63-12.11; p = 0.01) and limited knowledge about community services (AOR: 4.61; 95% CI: 1.42-15.02; p = 0.01) quadrupled the odds of loneliness. Similarly, older adults who were frail (AOR: 2.69; 95% CI: 0.88-8.17; p = 0.08) and who rated their community livability as low (AOR: 3.35; 95% CI: 0.81-13.87; p = 0.09) were more likely to experience loneliness., Discussion: This needs assessment provided important information about the individual and social drivers of SI/L among rural older adults in the community. Findings support the generation of localized data to support muti-partner efforts to design sustainable programs to address SI/L., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision., (Copyright © 2024 Southerland, Zheng, Dodson, Mauck, Bacsu, Brown, Holloway, Kim, Malatyali and Smith.)
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- 2024
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35. PEP-1-PIN1 Promotes Hippocampal Neuronal Cell Survival by Inhibiting Cellular ROS and MAPK Phosphorylation.
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Park JH, Shin MJ, Youn GS, Yeo HJ, Yeo EJ, Kwon HJ, Lee LR, Kim NY, Kwon SY, Kim SM, Cho YJ, Lee SH, Jung HY, Kim DW, Eum WS, and Choi SY
- Abstract
Background : The peptidyl-prolyl isomerase (PIN1) plays a vital role in cellular processes, including intracellular signaling and apoptosis. While oxidative stress is considered one of the primary mechanisms of pathogenesis in brain ischemic injury, the precise function of PIN1 in this disease remains to be elucidated. Objective : We constructed a cell-permeable PEP-1-PIN1 fusion protein and investigated PIN1's function in HT-22 hippocampal cells as well as in a brain ischemic injury gerbil model. Methods : Transduction of PEP-1-PIN1 into HT-22 cells and signaling pathways were determined by Western blot analysis. Intracellular reactive oxygen species (ROS) production and DNA damage was confirmed by DCF-DA and TUNEL staining. Cell viability was determined by MTT assay. Protective effects of PEP-1-PIN1 against ischemic injury were examined using immunohistochemistry. Results : PEP-1-PIN1, when transduced into HT-22 hippocampal cells, inhibited cell death in H
2 O2 -treated cells and markedly reduced DNA fragmentation and ROS production. This fusion protein also reduced phosphorylation of mitogen-activated protein kinase (MAPK) and modulated expression levels of apoptosis-signaling proteins in HT-22 cells. Furthermore, PEP-1-PIN1 was distributed in gerbil hippocampus neuronal cells after passing through the blood-brain barrier (BBB) and significantly protected against neuronal cell death and also decreased activation of microglia and astrocytes in an ischemic injury gerbil model. Conclusions : These results indicate that PEP-1-PIN1 can inhibit ischemic brain injury by reducing cellular ROS levels and regulating MAPK and apoptosis-signaling pathways, suggesting that PIN1 plays a protective role in H2 O2 -treated HT-22 cells and ischemic injury gerbil model.- Published
- 2024
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36. Residual Red Blood Cell Volume in Extracorporeal Blood Circuit After Hemodialysis: A Single-center Study.
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Hong SY, Beck NS, Lee JR, Jeon EK, Kim SM, Park SR, Park OJ, Hong J, and Im JI
- Abstract
Introduction: The factors contributing to blood loss during HD procedures remain underexplored. This study aimed to quantify blood loss during HD and identify the potential factors associated with it., Methods: The study included 70 ESRD patients undergoing HD. After dialysis, the extracorporeal blood circuits were rinsed with 1,000 mL of 0.05% NH3 solution in distilled water, and hemoglobin (Hb) levels were measured. Univariate regression was used to assess the linear relationship between residual red blood cell (RBC) volume and various parameters, including HD mode, dialyzer surface area, ultrafiltration goal (UFG), hypotension during HD, blood flow rate, activated partial thromboplastin time (aPTT), and C-reactive protein (CRP). Multivariate regression was also conducted to explore the relationships among these parameters., Results: The mean RBC volume remaining in the extracorporeal blood circuit after HD was 1.6 ± 0.9 ml (mode: 1.0, range: 0.3-6.5 ml). When converted to whole blood volume per patient, the mean blood volume was 5.3 ± 3.0 ml (median: 4.1 ml, mode: 4.0 ml, range: 1.0-19.0 ml). Multivariate analysis identified the dialyzer surface area as the only significant determinant of residual RBC volume., Conclusion: After HD, the remaining RBC volume in the extracorporeal blood circuit varies from 1.6 to 6.5 ml. When the RBC volume was converted to whole blood volume for each case, the blood loss ranged from 1.0 to 19.0 ml. Dialyzer surface area was the only significant determinant of residual RBC volume., (S. Karger AG, Basel.)
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- 2024
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37. Comparison of off-target pesticide drift in paddy fields from unmanned aerial vehicle spraying using cellulose deposition sampler.
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Eun HR, Kim SH, Lee YH, Kim SM, Lee YJ, Jung HY, Min YG, Noh HH, and Shin Y
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- Pesticides analysis, Chromatography, Liquid, Wind, Fungicides, Industrial analysis, Aircraft, Oryza chemistry, Environmental Monitoring methods, Cellulose chemistry, Cellulose analysis, Agriculture methods, Tandem Mass Spectrometry, Pesticide Residues analysis
- Abstract
Off-target pesticide drift in paddy fields following unmanned aerial vehicle (UAV) spraying was evaluated using cellulose deposition samplers (CDSs). An analytical method for quantifying ferimzone Z and E isomers deposited on CDSs was developed using LC-MS/MS. The suitability of the CDS method was confirmed by comparing deposition patterns on CDSs with residue levels in rice plant samples. To assess pesticide deposition in paddy fields, CDSs were strategically placed at varying distances from target areas, followed by UAV spraying. The fungicide agrochemicals were applied with and without adjuvants, and wind direction affected the drift trajectory for all treatment groups. Adjuvants, particularly soy lecithin as the major component, significantly enhanced pesticide deposition within the spray pathway while reducing drift rates relatively by 47.9-68.0 %. Higher wind speeds were found to exacerbate drift, but adjuvant-treated sprays showed less variability in deposition patterns under these conditions. Pesticide residues in harvested brown rice were found to be below the maximum residue limits (MRLs), ensuring safety for consumption. These findings highlight the importance of selecting appropriate adjuvants in UAV-based pesticide applications to optimize deposition efficiency and minimize environmental contamination., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
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- 2024
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38. Label-free detection of glutathione and glutathione disulfide in biological fluid by using an alpha-hederin nanopore.
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You SM, Jeong KB, Kang DG, Kim SM, and Kim YR
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- Animals, Humans, Cattle, Oxidative Stress, Glutathione chemistry, Glutathione analysis, Glutathione blood, Nanopores, Biosensing Techniques methods, Glutathione Disulfide analysis, Glutathione Disulfide chemistry, Glutathione Disulfide blood, Oxidation-Reduction
- Abstract
Glutathione (GSH) is indispensable for maintaining redox homeostasis in biological fluids and serves as a key component in cellular defense mechanisms. Accurate assessment of GSH relative to its oxidized counterpart, glutathione disulfide (GSSG), is critical for the early diagnosis and understanding of conditions related to oxidative stress. Despite existing methods for their quantification, the label-free and simultaneous measurement of GSH and GSSG in biological fluid presents significant challenges. Herein, we report the use of an alpha-hederin (Ah) nanopore for the direct measurement of the GSH:GSSG ratio in simulated biological fluid, containing fetal bovine serum (FBS). This system hinges on detecting characteristic relative ion blockades (ΔI/I
o ) as GSH and GSSG molecules pass through the Ah nanopore under an applied electric field. The distinct current blockage signals derived from the translocation of GSH and GSSG enabled us to determine the molar ratio of GSH and its oxidized form. Notably, the interactions between the hydroxyl groups of the sugar moiety lining the nanopore's inner surface and the sulfhydryl group of GSH significantly influence the translocation dynamics, resulting in a longer translocation time for GSH compared to GSSG. The Ah nanopore technology proposed in this study offers a promising approach for real-time, single molecule-level monitoring of glutathione redox status in biological fluids, eliminating the need for labeling or extensive sample preparation., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)- Published
- 2024
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39. Exercise effects on neuropsychiatric symptoms and quality of life in mild cognitive impairment: a systematic review and meta-analysis.
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Chen L and Kim SM
- Abstract
Background: Exercise is considered as a cost-efficient option for individuals with mild cognitive impairment (MCI). Although the potential benefits of exercise for improving cognitive function are recognized, its impact on neuropsychiatric symptoms (NPS) and the quality of life (QoL) in individuals with MCI remains unclear., Objective: This study aims to investigate the effects of exercise interventions on NPS, including depression, anxiety, sleep disorders, and the quality of life in individuals with MCI., Results: There were 17 randomized controlled trials (RCTs) involving 1,575 participants were included. The findings indicate a small but significant positive effect of exercise on depression (standardized mean difference [SMD] = -0.47, 95% confidence interval [CI]: -0.73 to -0.21), but the quality of the evidence is low. Mind-body exercises were relatively more effective in alleviating depression. No significant improvements were observed in sleep disorders (SMD = -1.27, 95% CI: -2.80 to 0.26). Exercise improved anxiety in one study but had no effect in the other. It also improved quality of life in seven studies, with two showing no effect., Conclusion: The findings suggest that exercise, particularly mind-body exercises, can improve depression in individuals with MCI. However, the effect of exercise on anxiety, sleep disorders, and quality of life is still uncertain, necessitating additional research. These findings underscore the significance of integrating customized exercise programs in managing MCI to boost quality of life and mitigate NPS., Systematic Review Registration: https://www.crd.york.ac.uk/prospero/. ID: CRD42023445369., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Chen and Kim.)
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- 2024
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40. Maternal Diet during Pregnancy Alters the Metabolites in Relation to Metabolic and Neurodegenerative Diseases in Young Adult Offspring.
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Kim SM, Oh S, Lee SS, Park S, Hur YM, Ansari A, Lee G, Paik MJ, You YA, and Kim YJ
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- Pregnancy, Animals, Female, Rats, Male, Diet, Metabolome, Metabolic Diseases metabolism, Metabolic Diseases etiology, Metabolomics methods, Tandem Mass Spectrometry, Neurodegenerative Diseases metabolism, Neurodegenerative Diseases etiology, Prenatal Exposure Delayed Effects metabolism, Rats, Sprague-Dawley, Maternal Nutritional Physiological Phenomena
- Abstract
Maternal nutrition during the critical period of pregnancy increases the susceptibility of offspring to the development of diseases later in life. This study aimed to analyze metabolite profiles to investigate the effect of maternal diet during pregnancy on changes in offspring plasma metabolites and to identify correlations with metabolic parameters. Pregnant Sprague-Dawley rats were exposed to under- and overnutrition compared to controls, and their offspring were fed a standard diet after birth. Plasma metabolism was profiled in offspring at 16 weeks of age using liquid chromatography-mass spectrometry (LC-MS/MS) and gas chromatography-tandem mass spectrometry (GC-MS/MS). We analyzed 80 metabolites to identify distinct metabolites and metabolic and neurodegenerative disease-associated metabolites that were sex-differentially altered in each group compared to controls ( p < 0.05, VIP score > 1.0). Specifically, changes in 3-indolepropionic acid, anthranilic acid, linoleic acid, and arachidonic acid, which are involved in tryptophan and linoleic acid metabolism, were observed in male offspring and correlated with plasma leptin levels in male offspring. Our results suggest that fatty acids involved in tryptophan and linoleic acid metabolism, which are altered by the maternal diet during pregnancy, may lead to an increased risk of metabolic and neurodegenerative diseases in the early life of male offspring.
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- 2024
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41. Identification of Preeclamptic Placenta in Whole Slide Images Using Artificial Intelligence Placenta Analysis.
- Author
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Jung YM, Park S, Ahn Y, Kim H, Kim EN, Park HE, Kim SM, Kim BJ, Lee J, Park CW, Park JS, Jun JK, Kim YG, and Lee SM
- Subjects
- Humans, Pregnancy, Female, Adult, Case-Control Studies, ROC Curve, Image Processing, Computer-Assisted, Area Under Curve, Algorithms, Pre-Eclampsia diagnosis, Pre-Eclampsia pathology, Placenta pathology, Artificial Intelligence
- Abstract
Background: Preeclampsia (PE) is a hypertensive pregnancy disorder linked to placental dysfunction, often involving pathological lesions like acute atherosis, decidual vasculopathy, accelerated villous maturation, and fibrinoid deposition. However, there is no gold standard for the pathological diagnosis of PE and this limits the ability of clinicians to distinguish between PE and non-PE pregnancies. Recent advances in computational pathology have provided the opportunity to automate pathological analysis for diagnosis, classification, prediction, and prediction of disease progression. In this study, we assessed whether computational pathology could be used to identify PE placentas., Methods: A total of 168 placental whole-slide images (WSIs) of patients from Seoul National University Hospital (comprising 84 PE cases and 84 normal controls) were used for model development and internal validation. For external validation of the model, 76 placental slides (including 38 PE cases and 38 normal controls) were obtained from the Boramae Medical Center (BMC). To establish standard criteria for diagnosing PE and distinguishing it from controls using placental WSIs, patch characteristics and quantification of terminal and intermediate villi were employed. In unsupervised learning, K -means clustering was conducted as a feature obtained through an Auto Encoder to extract the ratio of each cluster for each WSI. For supervised learning, quantitative assessments of the villi were obtained using a U-Net-based segmentation algorithm. The prediction model was developed using an ensemble method and was compared with a clinical feature model developed by using placental size features., Results: Using ensemble modeling, we developed a model to identify PE placentas. The model showed good performance (area under the precision-recall curve [AUPRC], 0.771; 95% confidence interval [CI], 0.752-0.790), with 77.3% of sensitivity and 71.1% of specificity, whereas the clinical feature model showed an AUPRC 0.713 (95% CI, 0.694-0.732) with 55.6% sensitivity and 86.8% specificity. External validation of the predictive model employing the BMC-derived set of placental slides also showed good discrimination (AUPRC, 0.725; 95% CI, 0.720-0.730)., Conclusion: The proposed computational pathology model demonstrated a strong ability to identify preeclamptic placentas. Computational pathology has the potential to improve the identification of PE placentas., Competing Interests: The authors have no potential conflicts of interest to disclose., (© 2024 The Korean Academy of Medical Sciences.)
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- 2024
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42. The Comparison of Intravesical Therapy and Surgery as Treatment Options for Bladder Cancer (CISTO) study: Lessons learned about management and patient enrollment in a large, pragmatic, patient-centered trial.
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Nathan KK, Follmer KM, Nash MG, Wolff EM, Lee JR, Mecham S, Yano M, Kim SM, Comstock BA, Gore JL, and Smith AB
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Background: The growth of patient and public involvement in clinical research highlights the paucity of literature on operational practices that ensure the success of large, patient-centered outcomes trials. The authors' objective was to identify tools launched by the Comparison of Intravesical Therapy and Surgery as Treatment Options for Bladder Cancer (CISTO) study team to determine their effectiveness in maximizing patient enrollment in this observational, pragmatic trial., Methods: The primary outcomes for this study were patient screening and enrollment across 36 CISTO study sites. The operational strategies included CISTOquestion email correspondence and All Sites Meetings, specifically poll performance data from meetings, and a nonanonymized feedback survey about the CISTO study's management practices. Effectiveness was measured using correlation analysis with patient cohort data, including screenings, enrollments, post-hoc exclusions, and the post-hoc exclusion rate., Results: Average screenings and enrollment rose after the implementation of CISTOquestion in April 2021, with the average number of screenings rising from 7.42 to 26.8 patients per month and enrollment rising from 3.76 to 16 patients per month. Use of CISTOquestion was correlated strongly with increased patient screenings and enrollment across all study sites. Eighty-three percent of sites with above-average post-hoc exclusion rates (≥0.092) sent below the average number of CISTOquestion inquiries. Poll performance and survey data revealed that all survey respondents who used CISTOquestion found that it was a valuable and accessible resource., Conclusions: Of the several operational tools implemented within the CISTO study that aimed to improve patient enrollment, CISTOquestion, a centralized email for addressing eligibility questions, was most beneficial to overall patient accrual., (© 2024 American Cancer Society.)
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- 2024
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43. Identification of Essential Features in Developing a Novel Femoral Stem Reflecting Anatomical Features of East Asian Population: A Morphological Study.
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Bahk JH, Han SB, Rhyu KH, Yoo JJ, Lim SJ, Park KK, Kim SM, and Lim YW
- Abstract
Background : Recent advancements in hip arthroplasty aim to enhance the stability, longevity, and functionality of femoral implants. However, the distal fitting of femoral stems, often caused by metaphyseal-diaphyseal mismatch, remains a significant issue, particularly in patients with Dorr type A femora. Such mismatches can result in suboptimal implant performance, leading to potential complications. This study focuses on evaluating the anatomical compatibility of five representative single-tapered wedge mid-short stems with the mediolateral (ML) anatomy of the proximal femur in an East Asian population, where these mismatches are often more pronounced. Methods : A total of 742 patients from two hospitals, all of whom underwent unilateral primary total hip arthroplasty, were included in the study. The contralateral proximal femur was confirmed to have normal anatomy in each patient. Hip anteroposterior radiographs were used for measurements, which were standardized in conjunction with CT images. Key anatomical parameters were measured, including proximal and distal medial-lateral canal dimensions, vertical offset, and medial offset. Five femoral stem designs-Tri-lock
® , Taperloc® , Anthology® , Accolade II® , and Fit® -were evaluated. R programming was employed for a detailed fit analysis to match stem sizes with patient anatomy, categorizing the fit as proximal, simultaneous proximal-distal, or distal engagement. Results : Among the femoral stems analyzed, the Fit® stem demonstrated the closest alignment with the regression line for ML widths in the study population (slope = 0.69; population ML slope = 0.38). This was followed by Accolade II® , which had a slope of 0.83. In terms of offset options, the Accolade II® offered the largest offset coverage, making it particularly suitable for this population. The fit analysis revealed that the Fit® stem had the highest suitable fit rate (90.56%), followed by Accolade II® (73.04%). Taperloc® , Anthology® , and Tri-lock® had similar fit rates of approximately 59%. Overall, optimal results were obtained for 92.05% of the population in the automated fitting trial, regardless of the product type. Conclusions : When designing modern cementless femoral stems intended for press-fit fixation, it is crucial to account for the anatomical variations specific to the target population. In this study, Fit® and Accolade II® femoral components demonstrated superior compatibility with the femoral anatomy of the East Asian population, particularly in those with a higher incidence of Dorr type A femora. These stems, characterized by slimmer distal dimensions and high-offset options, appear to minimize metaphyseal-diaphyseal mismatch and associated complications.- Published
- 2024
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44. Altered Gut Microbiome Composition in Dogs with Hyperadrenocorticism: Key Bacterial Genera Analysis.
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Kang HJ, Kim SW, Kim SM, La TM, Hyun JE, Lee SW, and Kim JH
- Abstract
Hyperadrenocorticism (HAC) is a common endocrine disorder in dogs, which is associated with diverse metabolic abnormalities. We hypothesized that elevated cortisol levels in dogs with HAC disrupt the gut microbiome (GM), and this disruption persists even after trilostane treatment. This study explored GM composition in dogs with HAC. We included 24 dogs, 15 with HAC and 9 healthy controls, and followed up with 5 dogs with HAC who received trilostane treatment. The GM analysis revealed significant compositional changes in dogs with HAC, including reduced microbiome diversity compared to healthy controls, particularly in rare taxa, as indicated by the Shannon index ( p = 0.0148). Beta diversity analysis further showed a distinct clustering of microbiomes in dogs with HAC, separating them from healthy dogs ( p < 0.003). Specifically, an overrepresentation of Proteobacteria (Pseudomonadota), Actinobacteria, Bacteroides , Enterococcus , Corynebacterium , Escherichia , and Proteus populations occurred alongside a decreased Firmicutes (Bacillota) population. Despite trilostane treatment, gut dysbiosis persisted in dogs with HAC at a median of 41 d post treatment, suggesting its potential role in ongoing metabolic issues. We identified GM dysbiosis in dogs with HAC by examining key bacterial genera, offering insights into potential interventions like probiotics or fecal microbiota transplants for better HAC management.
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- 2024
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45. Early Mortality Stratification with Serum Albumin and the Sequential Organ Failure Assessment Score at Emergency Department Admission in Septic Shock Patients.
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Kim SM, Ryoo SM, Shin TG, Jo YH, Kim K, Lim TH, Chung SP, Choi SH, Suh GJ, and Kim WY
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Background: Early risk stratification is crucial due to septic patients' heterogeneity. Serum albumin level may reflect the severity of sepsis and host status. This study aimed to evaluate the prognostic ability of the initial sequential organ failure assessment (SOFA) score alone and combined with serum albumin levels for predicting 28-day mortality in patients with septic shock. Methods: We conducted an observational study using a prospective, multicenter registry of septic shock patients between October 2015 and May 2022 from 12 emergency departments in the Korean Shock Society and the results were validated by examining those from the septic shock cohort in Asan Medical Center. The primary outcome was 28-day mortality. The area under the receiver operating characteristic (ROC) curve was used to compare the predictive values of SOFA score alone and SOFA score combined with serum albumin level. Results: Among 5805 septic shock patients, 1529 (26.3%) died within 28 days. Mortality increased stepwise with decreasing serum albumin levels (13.6% in albumin ≥3.5, 20.7% in 3.5-3.0, 29.7% in 3.0-2.5, 44.0% in 2.5-2.0, 56.4% in <2.0). The albumin SOFA score was calculated by adding the initial SOFA score to the 4 points assigned for albumin levels. ROC analysis for predicting 28-day mortality showed that the area under the curve for the albumin SOFA score was 0.71 (95% CI 0.70-0.73), which was significantly higher than that of the initial SOFA score alone (0.68, 95% CI: 0.67-0.69). Conclusions: The combination of the initial SOFA score with albumin can improve prognostic accuracy for patients with septic shock, suggesting the albumin SOFA score may be used as an early mortality stratification tool.
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- 2024
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46. Case report: Combination technique of balloon dilation, membrane excision, and topical mitomycin C for the treatment of nasopharyngeal stenosis in a cat.
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Kwak HH, Kim SM, Yu L, Kim JH, and Woo HM
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A two-year-old neutered male Turkish Angora cat presented with respiratory signs, including chronic snoring sounds and dyspnea with open-mouth breathing. Nasopharyngeal stenosis (NPS) was diagnosed based on endoscopy and computed tomography (CT). An attempt was made to break down the membrane, causing stenosis in the nasopharynx through balloon dilation using a valvuloplasty balloon dilation catheter (12 mm × 3 cm) and retroflexed endoscope. The balloon size was selected according to the identified diameter of the stenotic site on nasopharyngeal CT images. The balloon was inflated with radiographic contrast medium and maintained for 2 min; the similar procedure was repeated four additional times. The stenotic membrane was excised after balloon dilation. Topical Mitomycin C (MMC) was then administered to the stenotic region. After 2 weeks, an additional MMC application was repeated to prevent recurrence. The cat remained free of clinical signs without recurrence for 12 months after the most recent procedure. In this study, effective treatment results were obtained using a combination of balloon dilation, membrane excision, and topical MMC for membranous nasopharyngeal stenosis in a cat., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Kwak, Kim, Yu, Kim and Woo.)
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- 2024
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47. Enhancing Omicron Sublineage Neutralization: Insights From Bivalent and Monovalent COVID-19 Booster Vaccines and Recent SARS-CoV-2 Omicron Variant Infections.
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Jeong HW, Rollon R, Kim SM, Gil J, Casel MA, Jang H, Choi JH, Jang SG, Lazarte JC, Kim HS, Kim JH, and Choi YK
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- Humans, Neutralization Tests, Female, Male, Adult, Middle Aged, BNT162 Vaccine immunology, Antibodies, Neutralizing blood, Antibodies, Neutralizing immunology, SARS-CoV-2 immunology, SARS-CoV-2 genetics, COVID-19 prevention & control, COVID-19 immunology, COVID-19 virology, Antibodies, Viral blood, Antibodies, Viral immunology, COVID-19 Vaccines immunology, COVID-19 Vaccines administration & dosage, Immunization, Secondary
- Abstract
Background: Omicron variants have rapidly diversified into sublineages with mutations that enhance immune evasion, posing challenges for vaccination and antibody responses. This study aimed to compare serum cross-neutralizing antibody responses against various SARS-CoV-2 Omicron sublineages (BA.1, BA.5, XBB.1.17.1, FK.1.1, and JN.1) in recipients of monovalent COVID-19 boosters, bivalent booster recipients, and individuals who had recovered from Omicron BA.5 infections., Methods: We conducted a micro-neutralization assay on serum samples from monovalent BNT162b2 booster recipients (N = 54), bivalent BNT162b2 booster recipients (N = 24), and SARS-CoV-2 Omicron BA.5-recovered individuals (N = 13). The history of SARS-CoV-2 Omicron infection was assessed using ELISA against the SARS-CoV-2 NP protein., Results: Bivalent booster recipients exhibited significantly enhanced neutralization efficacy against Omicron sublineages compared to those who had received monovalent booster vaccinations. Omicron BA.5-recovered individuals displayed similar neutralizing antibodies (NAbs) to the bivalent booster recipients. Despite the improved neutralization in bivalent recipients and BA.5-recovered individuals, there were limitations in neutralization against the recently emerged Omicron subvariants: XBB.1.17.1 FK.1.1, and JN.1. In both monovalent and bivalent booster recipients, a history of Omicron breakthrough infection was associated with relatively higher geometric mean titers of NAbs against Omicron BA.1, BA.5, and XBB.1.17.1 variants., Conclusion: This study underscores the intricate interplay between vaccination strategies, immune imprinting, and the dynamic landscape of SARS-CoV-2 variants. Although bivalent boosters enhance neutralization, addressing the challenge of emerging sublineages like XBB.1.17.1, FK.1.1, and JN.1 may necessitate the development of tailored vaccines, underscoring the need for ongoing adaptation to effectively combat this highly mutable virus., (© 2024 The Author(s). Influenza and Other Respiratory Viruses published by John Wiley & Sons Ltd.)
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- 2024
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48. Exploring the Interplay: Obesity, Lipid Metabolism, and Clinical Manifestations in Atopic Dermatitis.
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Chu H, Jung YW, Kim SM, Bae BG, Bae JM, Kim LK, Lee KH, and Park CO
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Background: The interest toward the association between atopic dermatitis (AD) and obesity is increasing, yet the possibility of abnormal lipid metabolism has never been investigated before., Objective: To identify the characteristics of patients with AD who are obese and analyze the serum lipid profiles of these patients., Methods: This observational study included 167 patients diagnosed with AD and underwent evaluations for serum lipid panels between July 2017 and October 2017. The patients' body mass index was used to determine obesity and the serum lipid panels were analyzed between patients who are obese and non-obese. Also, the disease severity and subjective symptoms were evaluated and serum total immunoglobulin E (IgE) and specific IgE levels were assessed., Results: Of the 167 patients with AD, there were 36 obese and 131 non-obese subjects. Obese patients were found to have a significantly higher disease severity, as well as higher serum triglyceride and low-density lipoprotein-cholesterol levels and lower high-density lipoprotein-cholesterol levels, which was most pronounced in adult males. Obesity AD patients also had a significantly higher serum total IgE, itch intensity score, and number of allergens sensitized., Conclusion: Patients with AD who are obese should be monitored for possible abnormalities in lipid metabolism. Obesity may be a factor that contributes to a higher disease severity of AD., Competing Interests: The authors have nothing to disclose., (© 2024 The Korean Dermatological Association and The Korean Society for Investigative Dermatology.)
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- 2024
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49. Analysis to evaluate novel separable dental implant stability: An experimental study in rabbits.
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Kwon IJ, Jeong JH, Lee SH, Pang K, Kim SM, Kim MY, Kim B, Han JJ, and Lee JH
- Abstract
Background/purpose: Peri-implantitis is a representative etiology that affects the long-term survival of dental implants. It is known that decontamination of the implant surface is essential for the successful outcome of regenerative therapy for peri-implantitis. In the present study, the stability of a novel separable dental implant (SDI) was evaluated and compared with a conventional non-separable dental implant (NDI) using biomechanical and histomorphometric analyses., Materials and Methods: In this animal study, 40 rabbits were implanted with two SDI fixtures in the left tibia and two NDI fixtures in the right tibia. The rabbits were sacrificed 3 and 6 weeks after implantation, and the implant samples were evaluated using resonance frequency analysis (RFA), micro-computed tomography (CT), removal torque testing, and histomorphometric analysis., Results: SDI exhibited comparable or better osseointegration and implant stability to NDI. In particular, SDI showed significantly higher implant stability quotient (ISQ) values immediately and 6 weeks after implantation, while removal torque values were significantly higher at both 3 and 6 weeks. In addition, microgaps on the histomorphometric images were not observed and abnormal signs or inflammation did not occur at the connection between the top and bottom parts of the SDI., Conclusion: The novel SDI fixture demonstrated sufficient osseointegration and biomechanical stability compared with NDI in this animal study. In addition, the changeable top part of SDI indicates that it may be effective in easily treating peri-implantitis in clinical practice. Additional future studies on the stability and clinical application after loading to the fixture are necessary., Competing Interests: The authors have no conflicts of interest relevant to this article., (© 2024 Association for Dental Sciences of the Republic of China. Publishing services by Elsevier B.V.)
- Published
- 2024
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50. Design Rules for Capillary Force-Induced Clustering and Recovery of Monolithic Microbridges on Microapertured Polymer Membrane.
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Seol C, Lee SH, Jang S, and Kim SM
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Microbridge structures have been widely used in microelectromechanical systems. When the devices with microbridges operate in diverse environments, including wet conditions, structural failures such as crumples, clustering, and collapse of micro/nanostructures occur due to the capillary force of liquid in this environment. It is necessary to establish comprehensive design criteria to address this. Herein, we investigate the structural stability of microbridges on microsized apertures in wet conditions. The multiscale structure is fabricated with microbridge width, spacing of 10 μm, and height of 6 μm while varying the supporting micro aperture size. The behavior of the microbridges is observed through an optical microscope during water dispensing on the bridges and evaporation. It is found that the microbridges remain stable on apertures of 100 μm in diameter, while clustering occurs on larger-sized apertures (300, 500 μm). Interestingly, in contrast to the 500 μm-sized aperture, the clustered microbridges on the 300 μm-sized aperture gradually recover to their original configuration after completely evaporating water. A simple theoretical model for capillary force-induced clustering and recovery is proposed to elucidate this phenomenon, which agrees with the experimental results. The microbridges constructed following the design rule can ensure robust and stable operation even in wet conditions. These findings contribute to advancing micro/nanoscale engineering and offer insights for developing innovative microdevices.
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- 2024
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