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MiR-886-5p Inhibition Inhibits Growth and Induces Apoptosis of MCF7 Cells
Zhang, Lei-Lei,Wu, Jiang,Liu, Qiang,Zhang, Yan,Sun, Zhu-Lei,Jing, Hong Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.4
Background and Aims: To explore the molecular mechanisms of miR-886-5p in breast cancer., we examined roles in inhibiting growth and migration of MCF-7 cells. Methods: MiR-886-5p mimics and inhibitors were used to express or inhibit MiR-886-5p, respectively, and MTT and clone formation assays were used to determine the survival and proliferation. Hoechst 33342/ PI double staining was applied to detect apoptosis. The expression of caspase-3, caspase-8, caspase-9, MT1-MMP, VEGF-C and VEGF-D was detected by Western blotting, and the levels of MMP2 and MMP9 secreted from MCF-7 cells were assessed by ELISA. MCF-7 cell migration was determined by wound healing and Transwell assays. Results: We found that the growth of MCF-7 cells was inhibited upon decreasing miR-886-5p levels. Inhibiting miR-866-5p also significantly induced apoptosis and decreased the migratory capacity of these cells. The expression of VEGF-C, VEGF-D, MT1-MMP, MMP2, and MMP9 was also found to be decreased as compared to controls. Conclusions: Our data show that downregulation of miR-886-5p expression in MCF-7 cells could significantly inhibit cell growth and migration. This might imply that inhibiting miR-886-5p could be a therapeutic strategy in breast cancer.
Genome-wide Association Studies for Osteoporosis: A 2013 Update
Hong-Wen Deng,Lei Zhang,Christopher J. Papasian,Hong-Wen Deng 대한골대사학회 2014 대한골대사학회지 Vol.21 No.2
In the past few years, the bone field has witnessed great advances in genome-wide as-sociation studies (GWASs) of osteoporosis, with a number of promising genes identified. In particular, meta-analysis of GWASs, aimed at increasing the power of studies by com-bining the results from different study populations, have led to the identification of nov-el associations that would not otherwise have been identified in individual GWASs. Re-cently, the first whole genome sequencing study for osteoporosis and fractures waspublished, reporting a novel rare nonsense mutation. This review summarizes the im-portant and representative findings published by December 2013. Comments are madeon the notable findings and representative studies for their potential influence and im-plications on our present understanding of the genetics of osteoporosis. Potential limi-tations of GWASs and their meta-analyses are evaluated, with an emphasis on under-standing the reasons for inconsistent results between different studies and clarificationof misinterpretation of GWAS meta-analysis results. Implications and challenges ofGWAS are also discussed, including the need for multi- and inter-disciplinary studies.
Hong-Lei Mu,Young-Chan Lee,Dong-Fang Ran 대한산업경영학회 2018 산업융합연구 Vol.16 No.3
근거리 무선통신 (Near Field Communication: NFC) 기술을 이용한 서비스가 많이 소개되고 있다. 본 연구의 목적은 NFC 간편결제 채택의도에 영양을 미치는 요일을 찾기 위한 것이다. 이를 위해, 본 연구는 기술수용모델 (Technology Acceptance Model: TAM)을 기반으로 한 연구모형을 제안하고자 한다. 인터넷 설문조사를 통해 NFC 간 편결제 서비스를 사용하는 사용자 353명의 자료가 수집되었다. 분석결과 상대적 이점, 사회적 영향 및 기술 가용성이 인지된 유용성에 중요한 영향을 미친다는 것을 확인할 수 있었다. 그러나 사용 용이성에는 상대적인 이점과 사회적 영 향만이 영향을 미치는 것으로 확인되었다. 인지된 사용 편의성은 인지된 유용성에 큰 영향을 미치며, 이들 모두 NFC 간편결제 채택의도에 큰 영향을 미치는 것으로 나타났다. 또한 분석결과, 개인 혁신성이 조절효과는 가지는 것으로 밝혀졌다. Near Field Communication has been emerged as a spectacular phenomenon. The aim of this study is to determine the factors influencing the adoption of NFC-enabled mobile payment. In order to analyze, this study proposes a research framework based on Technology Acceptance Model. 353 valid data were collected through the Internet who has used NFC technology. Results show that relative advantage, social influence, and technology availability have a significant effect on perceived usefulness (0.190***, 0.211***, 0.227***respectively). However, for perceived ease of use, only relative advantage and social influence were verified to have significant influence. Perceived ease of use significantly influence perceived usefulness (0.348***), and both of them significantly affect the NFC-payment adoption intention (0.199**, 0.361***). The results also verified the moderator variable of personal innovativeness (0.20*** and 0.297***respectively).
Lei He,Yong Dai,Zhe Wang,Lutao Yang,Luxia Zhang,Pengpeng Hu,Yutian Lei,Hong Mo,Haomiao Zhu,Jun Zhang 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.8
Oilfield wastewater has a significantly negative influence on the recovery efficiency due to its hypersalinity. Therefore, magnetic graphene oxide (GO) modified with ethylene diamine tetraacetic acid (EDTA) and grafted bypolyethylene glycol (PEG) nano-adsorbent was prepared to remove the Ca2+ and Cr6+ in Jidong Oilfield wastewaterspecifically. It was noteworthy that PEG-g-EDTA/Fe3O4/GO nano-adsorbent had excellent adsorption performance,with removal ratios up to 71.6% for Ca2+ and 42.7% for Cr6+ at 30 min. After the fifth recycling run, the nano-adsorbentstill remained with high removal ratios (69.3% for Ca2+ and 30.5% for Cr6+) and high reuse rates (89.4% for Ca2+and 95.2% for Cr6+), indicating that the nano-adsorbent had outstanding adsorption-desorption efficacy and high reusability. The adsorption test results demonstrated that the total salinity of the treated oilfield wastewater decreased byabout 5,000 ppm, and the displacement efficiency further increased by 12.5% by chemical flooding compared with theuntreated wastewater. Therefore, PEG-g-EDTA/Fe3O4/GO nano-adsorbent is an adsorbent with excellent potentialwhich can effectively remove Ca2+ and Cr6+ in oilfield wastewater to enhance oil recovery (EOR).
Analyzing the Adoption of Online Payment using System Dynamics
Hong-Lei Mu,Young-Chan Lee 대한산업경영학회 2018 산업융합연구 Vol.16 No.1
온라인 소매업은 인터넷 기반 회사들에게 전 세계의 온라인 고객들과 연결될 수 있는 기회를 제공했다. 그러 나 많은 고객들은 온라인 지불결제 서비스의 위험성이나 사용의 어려움으로 인해 원하는 상품을 선택하고도 온라인에 서 거래를 완료하지 못하는 경우가 종종 있다. 그동안 많은 연구자들이 온라인 지불결제에 영향을 미치는 요인들을 조 사했지만 온라인 시장 환경이 급격하게 변화되면서 향후 5년 또는 10년 후의 전개될 상황을 예측하기란 매우 어렵다. 본 연구의 목적은 온라인 지불결제에 영향을 미치는 요인들을 검토하고 제3자 결제 회사 및 온라인 서비스 제공 업체 에게 장기적인 동태적 의사 결정 모형을 제공하는데 있다. 이를 위해 본 연구는 온라인 지불결제 서비스 수용 모형을 개발하고 향후 10년 동안 전개될 상황을 시뮬레이션하기 위해 시스템 다이내믹스 기법을 사용하였다. 분석결과 온라인 지불결제 고객은 10년 안에 지속적으로 증가할 것이며 핵심 영향 요인으로는 서비스 품질, 시스템 품질 및 예상 소요 시간인 것으로 나타났다. Online retail business has provided internet-based companies with the opportunities to be connected with online customers from all over the world. However, many online customers do not complete their transactions online even if they have already choose what they want because they perceive online payment service is risky or perceive difficulty of paying online. A large body of researchers have examined the important variables that influence online payment, however, these studies can hardly predict the future development tendency after five or ten years since the environment of online market changes so fast more than ever. Therefore, the purpose of this study is to examine the importance of factors affecting online payment and to provide long term dynamic decision making model for third-party payment companies and online service providers. To serve the purpose, this study used system dynamics approach to develop a model of online payment adoption and to simulate various development paths for ten years. The analysis results show that the number of online payment customers increase continuously in ten years, and service quality, system quality, and effort expectancy are key factors for customers to pay online.