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Kim Min Jung,Ryu Borim,Park Eun-Gee,Yi Siyeon,Kim Kwangsoo,Park Jun Won,Shin Kichul 대한의학회 2024 Journal of Korean medical science Vol.39 No.4
This retrospective cohort study aimed to compare coronavirus disease 2019 (COVID-19)- related clinical outcomes between patients with and without gout. Electronic health recordbased data from two centers (Seoul National University Hospital [SNUH] and Boramae Medical Center [BMC]), from January 2021 to April 2022, were mapped to a common data model. Patients with and without gout were matched using a large-scale propensityscore algorithm based on population-level estimation methods. At the SNUH, the risk for COVID-19 diagnosis was not significantly different between patients with and without gout (hazard ratio [HR], 1.07; 95% confidence interval [CI], 0.59–1.84). Within 30 days after COVID-19 diagnosis, no significant difference was observed in terms of hospitalization (HR, 0.57; 95% CI, 0.03–3.90), severe outcomes (HR, 2.90; 95% CI, 0.54–13.71), or mortality (HR, 1.35; 95% CI, 0.06–16.24). Similar results were obtained from the BMC database, suggesting that gout does not increase the risk for COVID-19 diagnosis or severe outcomes.
Microbial Contamination Levels of Strawberries at Domestic Farms of South Korea
Won-Il Kim,A-Ra Jo,Se-Ri Kim,Song Hee Ryu,Ki-Woong Nam,Yohan Yoon,Deok-Hoon Yoon,So-Yong Oh,Myeong Hyeon Nam,Jae-Gee Ryu,Hwang-Yong Kim 한국토양비료학회 2014 한국토양비료학회지 Vol.47 No.6
Foodborne illness due to the consumption of contaminated raw strawberries is a continuing food safety concern. This study investigated and evaluated contamination levels of bacteria on strawberries at farms stage to evaluate potential hazards associated with fresh strawberries. A total of 315 samples, 105 samples from 5 sampling sites (A to E) of 21 farms and 210 samples from 1 sampling site of 6 farms, was collected every month for four months and analyzed to enumerate aerobic bacterial counts, Coliforms/E. coli, Bacillus cereus and Staphylococcus aureus. In addition, the prevalence study of five pathogens (S. aureus, E. coli, E. coli O157:H7, Salmonella spp. and Listeria monocytogenes) was performed on each sample. Aerobic bacterial counts ranged from 0.48 to 6.36 Log CFU/g, with the highest bacterial cell counts recorded for D and E sites. Coliforms were detected in 71 samples (22.5%) with a minimum of 0.48 cfu/g and a maximum of more than 4 Log CFU/g. B. cereus was detected in 98 samples (31.1%) among total samples analyzed. S. aureus was detected in 2 samples with a minimum of 0.48 Log CFU/g and a maximum of 1.38 Log CFU/g. E. coli, E. coli O157:H7, Salmonella spp. and L. monocytogenes were not isolated from any of the samples. The microbial contamination levels of strawberries determined in this study may be used as the fundamental data for microbiological risk assessment.
Autistic-like social behaviour in Shank2-mutant mice improved by restoring NMDA receptor function
Won, Hyejung,Lee, Hye-Ryeon,Gee, Heon Yung,Mah, Won,Kim, Jae-Ick,Lee, Jiseok,Ha, Seungmin,Chung, Changuk,Jung, Eun Suk,Cho, Yi Sul,Park, Sae-Geun,Lee, Jung-Soo,Lee, Kyungmin,Kim, Daesoo,Bae, Yong Chul Nature Publishing Group, a division of Macmillan P 2012 Nature Vol.486 No.7402
Autism spectrum disorder (ASD) is a group of conditions characterized by impaired social interaction and communication, and restricted and repetitive behaviours. ASD is a highly heritable disorder involving various genetic determinants. Shank2 (also known as ProSAP1) is a multi-domain scaffolding protein and signalling adaptor enriched at excitatory neuronal synapses, and mutations in the human SHANK2 gene have recently been associated with ASD and intellectual disablility. Although ASD-associated genes are being increasingly identified and studied using various approaches, including mouse genetics, further efforts are required to delineate important causal mechanisms with the potential for therapeutic application. Here we show that Shank2-mutant (Shank2<SUP>??/??</SUP>) mice carrying a mutation identical to the ASD-associated microdeletion in the human SHANK2 gene exhibit ASD-like behaviours including reduced social interaction, reduced social communication by ultrasonic vocalizations, and repetitive jumping. These mice show a marked decrease in NMDA (N-methyl-d-aspartate) glutamate receptor (NMDAR) function. Direct stimulation of NMDARs with d-cycloserine, a partial agonist of NMDARs, normalizes NMDAR function and improves social interaction in Shank2<SUP>??/??</SUP> mice. Furthermore, treatment of Shank2<SUP>??/??</SUP> mice with a positive allosteric modulator of metabotropic glutamate receptor 5 (mGluR5), which enhances NMDAR function via mGluR5 activation, also normalizes NMDAR function and markedly enhances social interaction. These results suggest that reduced NMDAR function may contribute to the development of ASD-like phenotypes in Shank2<SUP>??/??</SUP> mice, and mGluR modulation of NMDARs offers a potential strategy to treat ASD.
Kim, Yun-Gon,Oh, Joo Youn,Gil, Geun-Cheol,Kim, Mee Kum,Ko, Jung Hwa,Lee, Sukmook,Lee, Hyun Ju,Wee, Won Ryang,Kim, Byung-Gee IRL Press 2009 Current eye research Vol.34 No.10
<P>PURPOSE: To investigate the expression of alpha-Gal or unidentified non-Gal antigens in pig corneal endothelial cells and keratocytes, we performed the qualitative and quantitative analysis by using mass spectrometry. METHODS: The N-glycans from common adult pig corneal endothelial cells and keratocytes cultured in vitro were directly analyzed by using mass spectrometric approaches. In addition, immunochemical staining was added to confirm the non-Gal antigen expression in pig corneal cells. RESULTS: Totally, 34 of the sialylated N-glycans from pig corneal endothelial cells and 27 from pig keratocytes were identified and observed to contain nonhuman sialic acid, NeuGc as well as NeuAc. In addition, we were able to detect 25 of alpha-galactosylated N-glycan structures (22.2% of total) from the pig corneal endothelial cells and 18 of that (17.5% of total) from the pig keratocytes by using mass spectrometric approaches. On immunofluorescent staining, the expression of sialylated glycans was also observed. CONCLUSIONS: As well as alpha-Gal epitopes, several promising non-Gal antigens were widely expressed on both pig corneal endothelial cells and keratocytes. The detailed structural information of the alpha-Gal and non-Gal epitopes would be a tremendous value to develop a new strategy for the successful corneal xenotransplantation in future.</P>
Effects of Absolute Permeability on the Fractal Characteristics of the Artificially Fractured Cores
Kim, Hyun Tae,Huh, Dae Gee,Kim, Se Joon,Sung, Won Mo 한국암반공학회 2004 Geosystem engineering Vol.7 No.2
The purpose of this study is to grasp the relationship between the absolute permeability and fractal dimension of fracture system examined by experimental approach. For this purpose, we prepared eight types of artificially fractured system and measured absolute permeability by pressure pulse decay method, and calculated fractal dimension by box counting method. The correlation function between absolute permeability and fractal dimension is $K=2.3386D^{2.6436}$. The fractal dimension range of its application is lower than 1.5. The equation can be used as the permeability estimation with fractal dimension appeared on cross section which is perpendicular to direction of fluid flow, even if this equation has limits on using artificially fractured cores.
Kim, Suk Jung,Roh, Hong Gee,Jeon, Pyoung,Kim, Keon Ha,Lee, Kwang Ho,Byun, Hong Sik,Moon, Won-Jin,Kim, Gyeong-Moon,Kim, Young-Wook,Kim, Dong Ik The Korean Radiological Society 2007 KOREAN JOURNAL OF RADIOLOGY Vol.8 No.4
<P><B>Objective</B></P><P>The aim of this study was to examine the incidence of ischemia during protected carotid artery stenting (CAS) as well as to compare the protective efficacy of the balloon and filter devices on diffusion-weighted MR imaging (DWI).</P><P><B>Materials and Methods</B></P><P>Seventy-one consecutive protected CAS procedures in 70 patients with a severe (> 70%) or symptomatic moderate (> 50%) carotid artery stenosis were examined. A balloon device (PercuSurge GuardWire) and a filter device (FilterWire EX/EZ, Emboshield) was used in 33 cases (CAS-B group) and 38 cases (CAS-F group) to prevent distal embolization, respectively. All the patients underwent DWI within seven days before and after the procedures. The number of new cerebral ischemic lesions on the post-procedural DWI were counted and divided into ipsilateral and contralateral lesions according to the relationship with the stenting side.</P><P><B>Results</B></P><P>New cerebral ischemic lesions were detected in 13 (39.4%) out of the 33 CAS-Bs and in 15 (39.5%) out of the 38 CAS-Fs. The mean number of total, ipsilateral and contralateral new cerebral ischemic lesion was 2.39, 1.67 and 0.73 in the CAS-B group and 2.11, 1.32 and 0.79 in the CAS-F group, respectively. No statistical differences were found between the two groups (<I>p</I> = 0.96, 0.74 and 0.65, respectively). The embolic complications encountered included two retinal infarctions and one hemiparesis in the CAS-B group (9.09%), and one retinal infarction, one hemiparesis and one ataxia in the CAS-F group (7.89%). There was a similar incidence of embolic complications in the two groups (<I>p</I> = 1.00).</P><P><B>Conclusion</B></P><P>The type of distal protection device used such as a balloon and filter does not affect the incidence of cerebral embolization after protected CAS.</P>