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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.
Lei Zhu,조선복,Shu Ye,Kefayat Ullah,Zeda Meng,오원춘 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.22 No.-
CoS2, CoS2–graphene and CoS2–graphene/TiO2 composite was synthesized by a facile sonochemical andhydrothermal method. X-ray diffraction, scanning electron microscopy with energy-dispersive X-rayanalysis, transmission electron microscopy, FT-IR, UV–vis and BET surface area was calculated bynitrogen adsorption were used. The FT-IR results illuminated that CoS2 and TiO2 band transfers electronsto graphene with functional groups attached. UV–vis patterns indicated that CoS2–graphene/TiO2 havegood photoinduction effects in visible light region. The photocatalytic activity of sample was evaluatedby measuring the degradation of organic pollutants such as methylene blue (MB), and industrial dyessuch as Texbrite BA-L (TBA) under visible light.
Lei Zhu,Yali Zhang,Wen Zhang,Jiang Lu 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.2
The effects of exogenous abscisic acid (ABA) on phenolic characteristics of grapes and wines were investigated in Vitis vinifera cvs. Merlot and Cabernet Sauvignon. Exogenous ABA treatment at veraison significantly improved phenolic contents, mainly anthocyanins and flavonols, and antioxidant properties of the grape skins, but had no effects on total phenolics and antioxidant activities in the seeds or on basic fruit qualities. The wines made from ABA-treated grapes were also consequently enhanced in total phenolics, anthocyanins, flavonols and antioxidant activities. The proportions of methylated anthocyanins in the skins and acylated anthocyanins and derived pigments in the wines were decreased to some degree by exogenous ABA treatment. No distinct relationships were observed between ABA concentrations and phenolic characteristics, and the effects were observed even with 200 mg/L ABA. The results revealed that exogenous ABA applied at veraison offered opportunities to improve phenolic contents and nutritional values of grape skins and wines.
Zhu, Lei,Meng, Ze-Da,Oh, Won-Chun The Korean Ceramic Society 2012 한국세라믹학회지 Vol.49 No.2
This paper reported a simple deposition-precipitation method, introducing the metal (Ni, Ag and Sn) and $Na_2S{\cdot}5H_2O$ to preparedispersion metal sulfide nanoparticles on the surface of the Multi-walled carbon nanotube for synthesis of CNT-$M_xS_y$ ($NiS_2$, $Ag_2S$, SnS) composite photocatalysts. The characterization of the prepared CNT-$M_xS_y$ ($NiS_2$, $Ag_2S$, SnS) composites was performed by X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis and BET analysis. Furthermore, the MB degradation rate constant for CNT-SnS composite was $5.68{\times}10^{-3}$ under visible light irradiation, which was much higher than the corresponding values for other samples. The detailed formation and photocatalytic mechanism are also provided here.
Lei Zhu,Ze-Da Meng,오원춘 한국세라믹학회 2012 한국세라믹학회지 Vol.49 No.2
This paper reported a simple deposition–precipitation method, introducing the metal (Ni, Ag and Sn) and Na2S· 5H2O to preparedispersion metal sulfide nanoparticles on the surface of the Multi-walled carbon nanotube for synthesis of CNT-MxSy (NiS2, Ag2S, SnS) composite photocatalysts. The characterization of the prepared CNT-MxSy (NiS2, Ag2S, SnS) composites was performed by X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis and BET analysis. Furthermore, the MB degradation rate constant for CNT-SnS composite was 5.68 × 10−3 under visible light irradiation, which was much higher than the corresponding values for other samples. The detailed formation and photocatalytic mechanism are also provided here.
Lei Zhu,Xin Wu,Xixi Hu,Xinyue Li,Shanshan Lv,Chuan Zhan,Yunhua Chen,Changyuan Wang,Jingyu Xu 한국식품과학회 2023 Food Science and Biotechnology Vol.32 No.2
The total contents and antioxidant activities of phenolic compounds as well as anthocyanin profiles were analyzed and compared in fresh berries and fermented pomace of three grape cultivars with different pedigrees. The phenolic contents and antioxidant activities decreased significantly in skins (p < 0.05), while relatively large amounts of them were retained in seeds after fermentative maceration. Fermentative maceration also had a significant impact on the anthocyanin compositions. The proportions of anthocyanins with more stable structures, such as malvidin derivatives, methylated, diglucosides and nonacylated anthocyanins, increased significantly in the pomace skins (p < 0.05). There were obvious differences in phenolic features and anthocyanin profiles among the three cultivars. ‘NW196’, a wine hybrid of Vitis vinifera and V. quinquangularis, was characterized by the highest total anthocyanin contents and degree of diglucosylation. The results obtained in this study could contribute to the primary data for the development and utilization of winemaking pomace, especially from local non-Vitis vinifera grapes.
ZHU LEI,조대헌,이소영 한국국토정보공사 2017 지적과 국토정보 Vol.47 No.2
Visible Infrared Imaging Radiometer Suite Day-Night Band (VIIRS-DNB) data provides a much higher capability for observing and quantifying nighttime light (NTL) brightness in comparison with Defense Meteorological Satellite-Operational Linescan System (DMSP-OLS) data. In South Korea, there is little research on the detection of NTL brightness change using VIIRS-DNB data. This study analyzed the spatial distribution and change of NTL brightness between 2013 and 2016 using VIIRS-DNB data, and detected its spatial relation with possible influencing factors using regression models. The intra-year seasonality of NTL brightness in 2016 was also studied by analyzing the deviation and change clusters, as well as the influencing factors. Results are as follows: 1) The higher value of NTL brightness in 2013 and 2016 is concentrated in Seoul and its surrounding cities, which positively correlated with population density and residential areas, economic land use, and other factors; 2) There is a decreasing trend of NTL brightness from 2013 to 2016, which is obvious in Seoul, with the change of population density and area of industrial buildings as the main influencing factors; 3) Areas in Seoul, and some surrounding areas have high deviation of the intra-year NTL brightness, and 71% of the total areas have their highest NTL brightness in January, February, October, November and December; and 4) Change of NTL brightness between summer and winter demonstrated a significantly positive relation with snow cover area change, and a slightly and significantly negative relation with albedo change.
Lei Yang,Shuai Guo,Qiuling Yang,Yuankun Zhu,Bing Dai,Hailing Yu,Pei Lei,Jiecai Han,Ying Hou,Jiaqi Zhu 대한금속·재료학회 2015 ELECTRONIC MATERIALS LETTERS Vol.11 No.6
The preferentially oriented In2O3 thin films were prepared on glass substrates by conventional magnetron sputtering with Ar+ plasma exposure at room temperature. Based on the x-ray diffraction, x-ray photoelectron spectroscopy, and UV photoelectron spectroscopy results, it was found that the Ar+ plasma exposure not only enhanced the low-temperature crystallization of In2O3 thin films, but also led to a dramatic improvement in the work function. Furthermore, it demonstrated that the shift mechanism of the work function in In2O3 thin films mainly combined with theelimination of oxygen defects and the change of the preferential orientation of In2O3 film surface.
Lei Zhu,Mei Mei Peng,조광연,Shu Ye,Sourav Sarkar,Kefayat Ullah,Ze-Da Meng,오원춘 한국세라믹학회 2013 한국세라믹학회지 Vol.50 No.6
In this study, ZnSe-TiO2 composites were synthesized by a facile hydrothermal-assisted sol-gel process and characterized by nitrogen adsorption isotherms (77 K), X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM) and UV-vis diffuse reflectance spectrophotometry. The photocatalytic activity was investigated by decoloration methylene blue (MB), methyl orange (MO), and rhodamine B (Rh.B) in an aqueous solution under visible light irradiation. The results revealed that the photocatalytic activity of the ZnSe-TiO2 photocatalyst was much higher than that of pureTiO2. The ZnSe nanoparticles, which act as a photosensitizer, not only extend the spectral response of TiO2 to the visible region but also reduce charge recombinations.
Lei Zhu,임창성,Ze-Da Meng,최종근,박종연,Trisha Ghosh,조광연,오원춘 한양대학교 세라믹연구소 2012 Journal of Ceramic Processing Research Vol.13 No.3
Nanoscale ZnS-photosensitized TiO2 particles supported on acid functionalized multi-wall carbon nanotubes (MWCNTs) were prepared via a mild hydrothermal route. The new optical properties and porous structure of the as-prepared samples were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), BET surface area analysis,UV-vis DRS and X-ray diffraction (XRD). The photocatalytic activities of the composite catalysts were evaluated by the decomposition of an MB solution under visible light irradiation. The results indicate that the addition of an appropriate amount of MWCNTs as supports for TiO2 and ZnS efficiently inhibit the agglomeration of ZnS/TiO2 thus improving the dispersion of nanoparticles and the activity of visible photodegradation was remarkably improved.