• BMB Reports
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• 제50권3호
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• pp.126-131
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• 2017

P48 Ebp1 is expressed in rapidly proliferating cells such as cancer cells and accelerates cell growth and survival. However, its expression pattern and role in central nervous system development have not been studied. Here, we demonstrated the spatiotemporal expression pattern of p48 Ebp1 during embryonic development and the postnatal period. During embryonic development, p48 Ebp1 was highly expressed in the brain. Expression gradually decreased after birth but was still more abundant than p42 expression after birth. Strikingly, we found that p48 Ebp1 was expressed in a cell type specific manner in neurons but not astrocytes. Moreover, p48 Ebp1 physically interacted with beta tubulin but not alpha tubulin. This fits with its accumulation in distal microtubule growth cone regions. Furthermore, in injured hippocampal slices, p48 Ebp1 introduction promoted axon regeneration. Thus, we speculate that p48 Ebp1 might contribute to microtubule dynamics acting as an MAP and promotes CNS axon regeneration.

• BMB Reports
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• 제48권3호
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• pp.159-165
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• 2015

Although the short isoform of ErbB3-binding protein 1 (Ebp1), p42 has been considered to be a potent tumor suppressor in a number of human cancers, whether p42 suppresses tumorigenesis of lung cancer cells has never been clarified. In the current study we investigated the tumor suppressor role of p42 in non-small cell lung cancer cells. Our data suggest that the expression level of p42 is inversely correlated with the cancerous properties of NSCLC cells and that ectopic expression of p42 is sufficient to inhibit cell proliferation, anchorage-independent growth, and invasion as well as tumor growth in vivo. Interestingly, p42 suppresses Akt activation and overexpression of a constitutively active form of Akt restores the tumorigenic activity of A549 cells that is ablated by exogenous p42 expression. Thus, we propose that p42 Ebp1 functions as a potent tumor suppressor of NSCLC through interruption of Akt signaling.

• 성인간호학회지
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• 제28권1호
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• pp.83-94
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• 2016

Purpose: The purpose of this study was to explore how knowledge management of hospital and nurses' beliefs and competences on evidence-based practice can affect evidence-based decision making. Methods: In this descriptive study, a total of 184 nurses who were working in the five general hospitals participated. The data were collected through a self-administered questionnaire in September, 2014. Data were analyzed using descriptive statistics, independent t-test, one-way ANOVA, Pearson correlation coefficient, and step-wise multiple regression with SPSS/WIN Statistics 21.0 program. Results: Evidence-based decision making was correlated with EBP beliefs (r=.55, p<.001), EBP competence (r=.57, p<.001), and knowledge management (r=.50, p<.001). Hierarchical regression analysis showed that EBP beliefs (${\beta}=.18$, p=.005), EBP competence (${\beta}=.37$, p<.001), organizational knowledge management (${\beta}=.27$, p<.001) explained 48.6% of evidence based decision making (p<.001). Conclusion: The study results indicated that evidence-based practice competences, organizational knowledge management, and evidence-based practice beliefs were important factors on evidence-based decision making. In order to improve evidence-based practice among nurses through organizational knowledge management, EBP beliefs and competence at individual level need to be considered and incorporated into any systemic training of EBP.

• 한국식품과학회지
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• 제48권1호
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• pp.66-71
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• 2016

델피니딘은 양전하를 뛰는 diphenylpropane의 polyphenolic ring 구조를 가진 주요한 안토시아닌 색소 중에 하나이다. 최근 연구에서 델피니딘은 항산화, 항염증 뿐만 아니라 항암 효능을 가진다고 보고되었다. 본 연구에서는 전립샘 암에서 종양의 성장과 신생혈관생성에 관련된 중요한 인자인 VEGF 발현에 대한 델피니딘의 억제 효과를 조사하였다. RT-PCR을 통해 델피니딘을 처리한 PC3M 전립샘 암세포 세포에서 EGF로 유도한 VEGF mRNA 발현 수준이 감소됨을 확인하였다. 또한 델피니딘은 VEGF의 전사인자인 HIF-$1{\alpha}$와 STAT3가 세포 핵으로 전위되는 것을 효과적으로 억제하였다. 한편 luciferase assay을 통해 HRE-promoter 활성을 확인해 본 결과, 델피니딘이 HIF-$1{\alpha}$의 전사 활성을 억제시켜 VEGF 발현을 감소시키는 것을 알 수 있었다. 그리고 델피니딘은 EGFR의 발현에는 영향을 미치지 않고, Akt, p70S6K, 4EBP1의 인산화를 특이적으로 억제하는 것으로 나타났다. 결론적으로 델피니딘이 HIF-$1{\alpha}$와 STAT3, VEGF 발현을 억제를 통하여 암세포 증식억제와 신생혈관형성을 억제하는 역할을 새롭게 확인하였다.

• 동의생리병리학회지
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• 제34권1호
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• pp.24-29
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• 2020

In this study, we investigated the inhibition effects of mixtures of Atractylodes macrocephala (AM) and Amomum villosum (AV) water extracts on adipocyte differentiation. Treatment with mixtures of AM and AV extracts in a ratio of 3:1 for 24 and 48 hours did not show any cytotoxicity in OP9 cells. Mixtures of AM(3) and AV(1) extracts inhibited adipocyte differentiation, expression of peroxisome proliferator-activated receptor gamma (PPARγ) and CCAT/enhancer-binding protein alpha (C/EBPα), the major transcription factors of differentiation. It also inhibited the expression of lipoprotein lipase (LPL), adipocyte protein 2 (aP2), which are PPARγ-target genes in adipocyte. We also checked the inhibition effects on cell proliferation during the early stage of differentiation by treatment with mixtures of AM(3) and AV(1) extracts. It markedly inhibited adipocyte proliferation after 48 hours, and also the phosphorylation of ERK1/2 and Akt after 10 min or 3 hour. These results identify a possible mechanism of action of mixtures of AM(3) and AV(1) extracts, suggesting that the mixtures of AM(3) and AV(1) extracts-induced inhibition of ERK and Akt phosphorylation suppresses adipogenesis by inhibiting other signaling cascades that include PPARγ and C/EBPα during the process of OP9 adipocyte differentiation.

• Animal Bioscience
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• 제34권6호
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• pp.1006-1013
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• 2021

Objective: Cells have increased susceptibility to activation of apoptosis when suffering heat stress (HS). An effective supplementation strategy to mimic heat-induced apoptosis of bovine mammary epithelial cells (MECs) is necessary to maintain optimal milk production. This study aimed to investigate possible protective effects of the anti-apoptotic activity of 5-aminolevulinic acid (5-ALA) against HS-induced damage of bovine MECs. Methods: Bovine MECs were pretreated with or without 5-ALA at concentrations of 10, 100, and 500 µM for 24 h followed by HS (42.5℃ for 24 h and 48 h). Cell viability was measured with 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assays. Real-time quantitative polymerase chain reaction and Western blotting were used to explore the regulation of genes associated with apoptosis, oxidative stress, and endoplasmic reticulum (ER) stress genes. Results: We found that 5-ALA induces cytoprotection via inhibition of apoptosis markers after HS-induced damage. Pretreatment of bovine MECs with 5-ALA resulted in dramatic upregulation of mRNA for nuclear factor erythroid-derived 2-like factor 2, heme oxygenase-1, and NAD(P)H quinone oxidoreductase 1, all of which are antioxidant stress genes. Moreover, 5-ALA pretreatment significantly suppressed HS-induced ER stress-associated markers, glucose-regulated protein 78, and C/EBP homologous protein expression levels. Conclusion: 5-ALA can ameliorate the ER stress in heat stressed bovine MEC via enhancing the expression of antioxidant gene.

• 한국가금학회지
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• 제42권3호
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• pp.231-238
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• 2015

라이코펜은 항산화제로서 많이 알려져 있지만, 최근에는 포유동물에서 염증 관련 면역과 지방대사 조절자로서 관심의 대상이 되기 시작하였다. 본 연구는 산란계에서 라이코펜의 가공 및 급이형태가 지방대사, 지방산 및 포도당 운반, 면역관련 유전자들의 발현에 미치는 영향을 관찰하고자 실시하였다. 백색레그혼(25주령) 48수를 lycopene의 첨가원에 따라 대조군(CON, basal diet(BD)), 토마토 건조분말 급여군(T1, BD+tomato powder-containing 10 mg lycopene/kg 사료), 토마토 건조분말 유화처리군(T2, BD+micellar of tomato powder-containing 10 mg lycopene/kg 사료) 및 정제 lycopene 급여군 (T3, BD+purified 10 mg lycopene/kg 사료) 등 모두 4처리구로 설정하여 5주간 사양시험을 실시하였다. 시험 종료 후 각 개체의 간으로부터 total RNA를 추출하고 real-time PCR을 이용하여 유전자들의 발현을 분석하였다. 라이코펜을 급여받은 닭은 급여형태와 관계없이 모두 PPAR${\gamma}$의 발현을 억제하였다(P<0.05). 지방합성효소 유전자 FASN의 발현은 T2에서 효과적으로 감소하였으나(P<0.05), T1, T3에서는 영향이 없었다. SREBP2와 C/EBP${\alpha}$ 또한 T2에서 효과적으로 유전자 발현이 억제됨을 보였다. 세포 내 포도당 흡수기능을 하는 GLUT8은 T2와 T3에서 유전자 발현이 증가하였다(P<0.05). 지방산 산화를 위한 지방산 운반체인 CPT-1 유전자는 라이코펜에 의한 영향을 받지 않았다. 면역 관련 염증인자인 TNF${\alpha}$와 IL6는 라이코펜에 의하여 효과적으로 그 발현이 억제되었다(P<0.05). 본 연구결과는 라이코펜의 급여 형태가 지방대사 관련 유전자 발현에 영향을 미치며, 그 중 유화처리된 라이코펜이 지방대사, 포도당 및 면역반응에 더 효과적 급이 수단이 될 수 있음을 보여주었다.