• Asian Pacific Journal of Cancer Prevention
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• 제16권12호
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• pp.4965-4969
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• 2015

LCN2 (Lipocalin 2) is a 25 KD secreted acute phase protein, reported to be a novel regulator of angiogenesis in breast cancer. Up regulation of LCN2 had been observed in multiple cancers including breast cancer, pancreatic cancer and ovarian cancer. However, the role of LCN2 promoter methylation in the formation of microvessels is poorly understood. The aim of this study was to analyze the association of LCN 2 promoter methylation with microvessel formation and tumor cell proliferation in breast cancer patients. The LCN2 promoter methylation status was studied in 64 breast cancer tumors by methylation specific PCR (MSP). Evaluation of microvessel density (MVD) and Ki67 cell proliferation index was achieved by immunohistochemical staining using CD34 and MIB-1 antibodies, respectively. LCN2 promoter unmethylation status was observed in 43 (67.2%) of breast cancer patients whereas LCN2 methylation status was seen in 21 (32.8%). Further, LCN2 promoter unmethylation status was associated with aggressive tumor phenotype and elevated mean MVD in breast cancer patients.

• 동아시아식생활학회지
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• 제17권1호
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• pp.1-10
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• 2007

The effects of mulberry-leaf powder Tofu(MPT) on anthropometric measurements, including bone mineral density(BMD) in the right carpus, biochemical bone turnover markers, serum levels of lipids and macrominerals, were investigated in 30 smoking male adults who lived in Choongnam were given MPT(100 g/day) for 4 weeks. The average ages, number of smoked cigarettes and packyear were 22.38 years, 15.12/day and 3.54 years, respectively. The nutrient contents per 100 g MPT were 86.10 kcal energy, 8.98 g protein, 0.53 mg fiber, 211.33 mg Ca and 1.59 g fat. Anthropometric measurements, including dietary intake using the 24-hours recall method, carpal BMD using DEXA, serum levels of protein, albumin and glucose, lipid profiles (cholesterol, triglyceride, HDL-cholesterol, LDL-cholesterol) with Al(atherosclerosis index), HTR, CRF, LHBt, some biomarkers of BMD(serum alkaline phosphatase activity, osteocalcin, urinary DPD), and serum macrominerals(Ca, Ca/P ratio, Mg) and Pb were analyzed before and after consumption of MPT. After MPT consumption, dietary intakes of plant protein, total Ca and plant Ca increased significantly, but there were no significant differences in anthropometric measurements, BMD with bone metabolism markers, serum levels of protein, albumin or glucose, lipid profiles with AI, HTR, LHR and CRF.

• 대한한의학회지
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• 제42권2호
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• pp.90-97
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• 2021

DXA로 측정한 요추 부위와 대퇴골경의 골밀도 수치가 2년간 지속적으로 연령대 평균 이하였던 중년의 사무직 남성 환자가 접골탕을 복용하고 골밀도 수치가 개선되었다.

• 대한지역사회영양학회지
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• 제4권3호
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• pp.412-420
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• 1999

The amount and type of dietary protein that effects affect bone mineral loss after menopause and different dietary patterns may influence anthropometric measurements, biochemical values, and bone metabolism. Objective : Our objective was to investigate bone metabolism and chronic disease factors in two different dietary patterns. Design: The sample consisted of 40 lacto-ove-vegetarians(LOV) and 49 omnivores aged from 47 to 85 years in good condition without any medical problems. Results : The average energy intake of LOV was 1414.0kcal and omnivores, 1403.2kcal. The difference between means was not statistically significant. The differences of means of body weight and BMI between the two groups were not significant but the systolic blood pressure of LOV group was significantly lower than omniovores(p<0.05). The values of serum cholesterol(p<0.05) and glucose(p<0.05) of LOV were signifcantly lower than that of omnivores. The serum albumin level(p<0.01) of LOV was lower than it'scounterpart but in a normal range. The intake of crude fiber(p<0.05) of LOV group was significantly higher. The urinary pH of LOV was 7.4 and that of omnivores was 6.3(p<0.001). Plant calcium(p>0.05) and plant iron(p<0.001) had positive correlations with the uninary pH but animal protein(p>0.05) and animal iron(p>0.05) had negative correlations with the urinary pH. The level of urinary biochemical marker of bone resorption, deoxypyridinoline(DPD) of LOV was significantly lower than the other group(p>0.05). The T-scores of bone mineral density for the two sites in the two groups were not significantly different. Conclusions : The DPD level and urinary pH value of LOV were more desirable for the bone metabolism that the omnivores. The diet of LOV had lower risk factors of chronic diseases than the other group.

• 미생물학회지
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• 제39권2호
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• pp.118-122
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• 2003

바이러스 조립 과정 기작 연구를 위한 좋은 재료인 박데리오파아지 P2-P4시스템에 이용될 벡터 플라스미드를 개발하기 위하여, P4 ash8 sid71을 출발 물질로 삼아 새로운 P4 유도체 벡터를 조성하였다. 유전자 재조합 기법을 써서 쉽게 선택 가능한 tetracyclin내성 유전자(tetR)를 도입하고 플라스미드P 4의 크기를 조절하였다. 이를 통해 얻어진 P4 ash8(sid7l) tetR은 12.09 kb의 크기를 가지며, 필요할 때 P2로 induction하면 생물학적 활성을 가지는 박데리오파아지로 전환 가능하였다. 전환된 파아지의 burst size를 결정하고, CsCi 부양균등밀도 편차실험을 수행하였다. 균등밀도 실험 분포도에서 P2크기 파아지 머리의 packaging 상한을 추정할 수 있었다.

• 생물정신의학
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• 제20권4호
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• pp.119-128
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• 2013

Objectives Memory impairment is a very important mental health issue for elderly and adults. Mild cognitive impairment (MCI) is a prodromal stage of Alzheimer's disease (AD). Early detection of the prodromal stage of patients with AD is an important topic of interest for both mental health clinicians and policy makers. Methods Electroencephalograpgy (EEG) has been used as a possible biological marker for patients with MCI, and AD. In this review, we will summarize the clinical implications of EEG and ERP as a biological marker for AD and MCI. Results EEG power density, functional coupling, spectral coherence, synchronization, and connectivity were analyzed and proved their clinical efficacy in patients with the prodromal stage of AD. Serial studies on late event-related potentials (ERPs) were also conducted in MCI patients as well as healthy elders. Even though these EEG and ERP studies have some limitations for their design and method, their clinical implications are increasing rapidly. Conclusion EEG and ERP can be used as biological markers of AD and MCI. Also they can be used as useful tools for early detection of AD and MCI patients. They are useful and sensitive research tools for AD and MCI patients. However, some problems remain to be solved until they can be practical measures in clinical setting.

• 한국해양환경ㆍ에너지학회지
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• 제2권2호
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• pp.70-77
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• 1999

와류에 의한 이중 유벽 사이에 가두어진 기름층과 물의 계면의 교란에 대하여 고찰하였다. 와류는 전부 유벽의 끝에서 발생되는 것으로 간주하였다. 유동장의 해석을 위하여 포텐셜 유동 가정하에 계면을 와 특이점 분포면(vortex sheet)으로 나타내었다. 계면의 형상은 계면에 유한개의 가상의 입자를 설정한 후 그 위치를 추적하여 추하였다. 입자의 속도는 와 분포면에 의해서 유발되는 속도를 Biot-Savart 적분을 통해 구하고 여기에 이동하는 점와류(point vortex)에서 유발되는 속도를 합하여 구하였다. 시간에 대한 와 분포면상의 와도의 변화는 계면에서의 와도 방정식을 해석하여 구하였다. 여러 조건하에서 계산된 결과를 바탕으로 상당한 파고의 계면파가 전부 유벽 하단에서 발생되는 와류에 의하여 생성될 수 있음을 입증하였다.

• Animal Bioscience
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• 제36권2호
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• pp.295-306
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• 2023

Objective: Inhibiting the p38 mitogen-activated protein kinase (MAPK) signaling pathway delays differentiation and increases proliferation of muscle stem cells in most species. Here, we aimed to investigate the effect of p38 inhibitor (p38i) treatment on the proliferation and differentiation of chicken muscle stem cells. Methods: Chicken muscle stem cells were collected from the muscle tissues of Hy-line Brown chicken embryos at embryonic day 18, then isolated by the preplating method. Cells were cultured for 4 days in growth medium supplemented with dimethyl sulfoxide or 1, 10, 20 μM of p38i, then subcultured for up to 4 passages. Differentiation was induced for 3 days with differentiation medium. Each treatment was replicated 3 times. Results: The proliferation and mRNA expression of paired box 7 gene and myogenic factor 5 gene, as well as the mRNA expression of myogenic differentiation marker gene myogenin were significantly higher in p38i-treated cultures than in control (p<0.05), but immunofluorescence staining and mRNA expression of myosin heavy chain (MHC) were not significantly different between the two groups. Oil red O staining of accumulated lipid droplets in differentiated cell cultures revealed a higher lipid density in p38i-treated cultures than in control; however, the expression of the adipogenic marker gene peroxisome proliferator activated receptor gamma was not significantly different between the two groups. Conclusion: p38 inhibition in chicken muscle stem cells improves cell proliferation, but the effects on myogenic differentiation and lipid accumulation require additional analysis. Further studies are needed on the chicken p38-MAPK pathway to understand the muscle and fat development mechanism.

• 생명과학회지
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• 제25권9호
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• pp.1059-1071
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• 2015

수박과 멜론은 경제적 중요성을 지니는 대표적인 박과 작물이다. 최근 유전자 지도 작성 및 차세대 유전체 염기서열 분석에 기반한 분자마커 개발과 염기서열변이 탐색은 마커 이용 선발 및 여교잡 등 분자육종을 통한 품종육성에 필수적 기술이다. 본 연구에서는 이들 작물에 대한 국내외 유전체 분석 과 분자마커 개발 현황에 대해 분석ㆍ정리함으로서 향후 분자육종에 활용할 수 있는 정보를 제공하고자 하였다. 수박과 멜론은 참조유전체의 염기서열이 밝혀졌으며 다수의 유전자 지도가 작성되어 수량, 과특성, 내병성과 같은 주요 형질과 연관된 마커의 개발과 관련 유전자의 탐색이 꾸준히 진행되고 있다. 현재까지 해외에서 보고된 유전자지도는 수박 멜론 각 각 16종 이상이며, 40개 이상의 주요형질에 대한 유전자좌와 연관 마커들이 존재한다. 더욱이 고밀도 유전자 지도와 유전자지도 기반 클로닝을 통해 이러한 형질을 조절하는 기능 유전자에 정보가 밝혀지고 있다. 또한 참조게놈정보를 기반으로 한 다양한 유전자원의 전장유전체염기서열 재분석이 꾸준히 이루어지고 있다. 새로운 분자마커의 자체적 개발과 더불어 이와 같이 현재 활용 가능한 공개된 마커들의 정보를 통해 유전체학 이용 육종과정을 크게 앞당길 수 있을 것이다.

• Plant Breeding and Biotechnology
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• 제6권4호
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• pp.391-403
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• 2018

Genome resequencing by next-generation sequencing technology can reveal numerous single nucleotide polymorphisms (SNPs) within a closely-related cultivar group, which would enable the development of sufficient SNP markers for mapping and the identification of useful genes present in the cultivar group. We analyzed genome sequence data from 13 Korean japonica rice varieties and discovered 740,566 SNPs. The SNPs were distributed at 100-kbp intervals throughout the rice genome, although the SNP density was uneven among the chromosomes. Of the 740,566 SNPs, 1,014 SNP sites were selected on the basis of polymorphism information content (PIC) value higher than 0.4 per 200-kbp interval, and 506 of these SNPs were converted to Kompetitive Allele-Specific PCR (KASP) markers. The 506 KASP markers were tested for genotyping with the 13 sequenced Korean japonica rice varieties, and polymorphisms were detected in 400 KASP markers (79.1%) which would be suitable for genetic analysis and molecular breeding. Additionally, a genetic map comprising 205 KASP markers was successfully constructed with 188 $F_2$ progenies derived from a cross between the varieties, Junam and Nampyeong. In a phylogenetic analysis with 81 KASP markers, 13 Korean japonica varieties showed close genetic relationships and were divided into three groups. More KASP markers are being developed and these markers will be utilized in gene mapping, quantitative trait locus (QTL) analysis, marker-assisted selection and other strategies relevant to crop improvement.