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Fungal Distribution in Traditional Meju and Characterization of Isolated Strains
Ye-Eun Son,Ye-Jin Kang,Sun-Young Choi,Yoon-Kyung Choi,Ju-Eun Lee,Junyoung Kim,박희수 한국균학회 2023 韓國菌學會誌 Vol.51 No.3
This study was conducted to analyze the distribution and characteristics of fungal speciesin meju using the traditional method. Fungal distribution in meju was investigated usingmetagenomic and morphological analyses, based on which Aspergillus flavus/oryzae strainswere identified as the dominant fungi in all meju samples, followed by Pichia, Rhizopusand Lichtheimia spp. As A. flavus/oryzae was dominant, we further evaluated the aflatoxinproduction ability and enzymatic activity of the isolates. Thin-layer chromatography andpolymerase chain reaction revealed that the A. flavus/oryzae strains isolated from meju arenon-aflatoxigenic fungi. Based on the analyses of amylase and protease activities, strainswith high activities of amylase or protease were identified, which are proposed to be used asstarters for meju fermentation.
Ye Eun Lee,Jihyun Kim,Yoon Ji Choi,Jung Eun Park,Seok Hyun Kim,Jin Hyun Jun 한국발생생물학회 2017 한국발생생물학회 학술발표대회 Vol.2017 No.8
Spatiotemporal expressions of microRNAs (miRNAs) are altered by the physiological states of cells which could be influenced by microenvironment. Function of miRNAs has been focused as a new regulator of gene expressions and cell differentiation in human health and diseases. We found and identified the several miRNAs, which were related to developmental competence of preimplantation and implantation process of mouse blastocysts and outgrowth embryos by microarray-based bioinformatical studies. In this study, we evaluated three miRNAs expressions related to third cleavage event in conditioned media (CM) and blastocysts. Mouse 2-cell stage embryos were collected and monitored for 9 hours. The embryos were divided two groups as early third cleavage before 9 hours of collection and late third cleavage after 9 hours of collection. They were cultured to blastocyst stage up to day-5 after hCG injection. The total number of cells and the number of cells with fragmented DNA were assessed in blastocysts by terminal dUTP nick-end labelling (TUNEL) staining and DAPI staining. Mean cell number of early third cleavage group was significantly higher than that of late third cleavage group (105.3±8.0 vs 81.8±7.0, p<0.05), but apoptotic index was not different. The miRNAs of CM and blastocysts from early and late group were prepared, and quantified by qRT-PCR with TaqMan probes. The expression levels of three miRNAs (mmu-let-7b, mmu-miR-183, and mmu-miR-429) in CM and blastocysts were slightly upregulated in late third cleavage group. Our study suggested that the expression level of miRNAs could be altered with embryo quality, and miRNAs in CM may be used to predict miRNAs expression of embryos and developmental competence.
SARS-CoV-2-Naïve Korean Children and Adolescents Hospitalized With COVID-19 in 2021
Choi Youn Young,Choi Soo-Han,Choi Jae Hong,Kim Dong Hyun,Lee Joon Kee,Eun Byung Wook,Lee Hyunju,Kim Ye Kyung,Ahn Bin,Song Seung Ha,Yun Ki Wook 대한의학회 2022 Journal of Korean medical science Vol.37 No.42
Background: The risk of severe outcomes with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) delta variant remains low in children and adolescents, but less is known about its effect on the SARS-CoV-2-naïve population. This study evaluated clinical manifestations and risk factors for moderate-to-critical coronavirus disease 2019 (COVID-19) in mostly SARS-CoV-2-naïve children and adolescents in 2021. Methods: This multicenter retrospective study included patients aged 0–18 years who were hospitalized with COVID-19 at 8 referring hospitals in South Korea during the predeltapredominant and delta-predominant periods in 2021. Each case was labeled as either hospitalization with medical needs or for isolation. Severity was categorized as mild, moderate, severe, or critical with regard to pneumonia presence and illness severity. Results: Among 753 cases, most (99.5%) had no prior history of COVID-19 or vaccination against COVID-19. The proportions of hospitalization with medical needs (3.5% vs. 19.7%), moderate illness (0.9% vs. 4.0%), and severe/critical illness (0.8% vs. 5.3%) increased during delta predominance. The risk of moderate-to-critical COVID-19 among hospitalizations with medical needs was higher among patients aged 12–18 years (adjusted odds ratio [aOR], 4.1; 95% confidence interval [CI], 1.5–11.8) and with obesity (aOR, 6.9; 95% CI, 2.4–19.6) but not among patients infected during delta predominance. However, children with obesity experienced more severe COVID-19 during delta predominance (aOR, 6.1; 95% CI, 1.2–29.6). Conclusion: Despite its similar severity among most SARS-CoV-2-naïve children and adolescents, the delta variant may affect COVID-19 severity in those with high-risk underlying medical conditions. Underlying conditions, particularly obesity, may cause severe COVID-19 in children and adolescents, warranting strong consideration for vaccinating high-risk children.
Diagnostic Neuroimaging in Headache Patients: A Systematic Review and Meta-Analysis
Ye Eun Jang,Eun Young Cho,Hee Yea Choi,Sun Mi Kim,Hye Youn Park 대한신경정신의학회 2019 PSYCHIATRY INVESTIGATION Vol.16 No.6
Objective Neuroimaging in headache patients identifies clinically significant neurological abnormalities and plays an important role in excluding secondary headache diagnoses. We performed a systematic review and meta-analysis of the existing guidelines and studies surrounding neuroimaging in headache patients. Methods The research question involved determining the prevalence of detecting clinically significant neurological abnormalities using neuroimaging in patients suspected of primary headache. Searches of the PubMed and Embase databases were conducted on English- language studies published from 1991 to 2016, and the reference lists of the retrieved articles were also checked manually. All headache subtypes and patients aged ≥15 years were included in the analysis. Results Ten studies met the selection criteria. The pooled prevalence of detecting clinically significant abnormalities in the neuroimaging of headache patients was 8.86% (95% confidence interval: 5.12–15.33%). Subsequently, diverse subgroup analyses were performed based on the detection method, headache type, study type, study region, age group, and disease type. Conclusion The present findings indicate that limited neuroimaging methods should be carefully considered for headache diagnostic purposes when there are red flag symptoms. Limitations and suggested directions for future studies on neuroimaging in headache patients are described.
진달래뿌리 유래 탁시폴린 배당체 고함량 추출물의 멜라닌 생성 억제 및 주름개선 효과
권예은 ( Ye Eun Kwon ),김태희 ( Tae-hee Kim ),박선민 ( Sunmin Park ),정영환 ( Young Hwan Jeong ),김민석 ( Min Seok Kim ),최선은 ( Sun Eun Choi ) 한국목재공학회 2022 한국목재공학회 학술발표논문집 Vol.2022 No.1
최근 건강에 대한 관심이 증가하면서 부작용이 적은 천연물기반 소재를 향한 관심 또한 늘어나고 있다. 약용식물 기반 물질은 부작용이 적어 화장품 소재로 사용하기에 적합하다. 이와 같은 이유로 미백과 주름 개선에 효과를 가지는 천연물 기반 물질의 연구가 이루어졌다. 진달래 뿌리는 탁시폴린 배당체를 유효물질로 가지며, 예로부터 혈액순환을 통해 혈압을 개선하고, 지혈과 통증 완화, 해열진통 효과를 가지고 신경통 등에 사용되었으며, 이외에도 다양한 생리활성 기능을 가진다. 따라서 본 연구에서는 탁시폴린 배당체를 다량 함유한 진달래뿌리 추출물(RMR)의 미백과 주름개선에 대한 효과를 확인하기 위하여 멜라닌 생합성 저해 활성(Melanin assay) 및 콜라겐 분해 저해 활성(MMP-1 assay)을 평가하였다. 활성 실험 이전에 소재의 세포독성 유무를 확인하기 위해 세포독성 실험(MTT assay)을 진행하였으며, 실험에 사용된 10ppm, 50ppm, 100ppm에서 모두 독성이 없음을 확인하였다. Melanin assay에서 B16 melanoma cell에 멜라닌합성 촉진 호르몬인 α-MSH을 처리했을 때의 멜라닌 생합성율을 100%라 하였다. RMR을 농도별로 처리하였을 때 최고농도인 100ppm에서는 61.9%로 멜라닌 합성율이 감소하였고, 농도의존적으로 멜라닌의 합성을 저해하는 것을 확인하였다. MMP-1 assay에서 세포에 자외선을 조사하였을 때 콜라겐 분해를 유도하는 MMP-1의 생성율이 증가하였고, 증가한 생성율을 100%라 하였다. RMR을 농도별로 처리하여 활성을 확인하였다. 특히 50ppm과 100ppm에서는 양성대조군인 Retinoic acid의 42.2%l 보다 낮은 39.2% 와 8.0%의 생성율을 보이며 높은 MMP-1 저해 효과를 나타냈다. 이러한 결과를 통해 진달래 뿌리 추출물(RMR)은 멜라닌의 생합성을 저해하여 멜라닌의 생성을 억제하고, 콜라겐 분해를 저해하는 활성을 통해 미백과 주름개선에 효과를 가지는 것을 확인하였으며, 향후 미백과 주름개선 기능성 화장품의 소재로 개발 가능성이 높다고 사료된다.
최예원(Choi Ye Won),김찬욱(Kim Chan Wook),최미주(Choi Mi Joo),이윤정(Lee Yoon Jeong),황지영(Hwang Ji Young),박은주(Park Eun Joo),전하용(Jeon Ha Yong) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.11
최근 코로나 팬데믹으로 인해 배달음식을 즐겨 먹는 사람들이 증가하고 있다. 이로 인해 운동량 부족과 고칼로리 음식 섭취 등으로 불균형적인 영양소가 섭취가 되고 있다. 사람들의 올바른 식생활을 위해서 개인 식생활 데이터를 수집하고 분석해서 머신러닝을 이용해서 개인 맞춤형 식단을 제공하고자 한다. 본 논문에서는 머신러닝에 사용될 사람들의 식생활 데이터를 수집목적으로 개인의 식생활을 기록해서 데이터베이스에 저장하는 모바일 어플리케이션을 개발한다.