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您的检索式：作者名="PENG ChengXu"
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| 1 | MiRNA-429 suppresses the growth of gastric cancer cells in vitro显示文摘Micro-RNAs(miRNAs) have been found to be implicated in a very wide range of physiological processes.This study was aimed to investigate the regulation of miRNA-429(miR-429) in gastric cancer cells on cell proliferation and apoptosis.Quantitative PCR was employed to detect the expressions of miR-429 after eukaryotic expression plasmid of miR-429 and its inhibitor were transiently transfected into poorly differentiated human gastric can-cer cell line BGC823.The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT) reduction as-says were used to examine proliferation ability.Apoptosis was analyzed by flow cytometry after transfection.The results showed that 48 h after transfection,overexpression of miR-429 reached maximum efficiency.Compared with mock transfection,miR-429 inhibited tumor cell proliferation significantly(P < 0.05) at 48 h and 72 h.of Overexpression of miR-429 promoted tumor cell apoptosis when compared with mock transfected cells(P < 0.05).On the contrary,miR-429 inhibitor promoted tumor cell proliferation and inhibited apoptosis when compared with controls(P < 0.05).Our results suggested that miRNA-429 may serve as a tumor suppressor during tumorigenesis of gastric cancer and may be a potential gastric cancer therapeutic target. | Di Liu Peng Xia Dongmei Diao Yao Cheng Hao Zhang Dawei Yuan Chen Huang Chengxue Dang | 2012 | The Journal of Biomedical Research2012，26，5： | 12 |
| 2 | Detection of hypermethylated fibrillin-1 in the stool samples of colorectal cancer patients显示文摘 | Qi Guo Yongchun Song Hao Zhang Xuandi Wu Peng Xia Chengxue Dang | 2013 | Medical Oncology2013，，4： | 2 |
| 3 | Recrystallization nucleation under close-setδphase in a nickel-based superalloy during annealing显示文摘Annealing is one of the most efficient heat treatment to refine the grain microstructure in metal alloys.Prior to the annealing,an aging treatment can be implemented to precipitate the second phases for more nucleation sites in deformed mixed grains during subsequent recrystallization.However,the underlying mechanism behind the second phases and recrystallization has not yet been fully understood.Taking a typical deformed nickel(Ni)-based(GH4169)superalloy as an exapmle,this research aims to clairfy the connections between the recrystallization and delta(δ)phase(Ni_(3)Nb) during annealing.All deformed samples were also treated by aging and then annealing.The results show that the microstructure and component ofδphase dominated the recrystallization nucleation in the Ni-based alloy.Moreover,there was the presence of theδphase interval limiting nucleation(PILN)andδphase protecting nucleation(PPN),when a high content of close-set phase was precipitated from the matrix.The PILN determined the primary condition for the recrystallization nucleation that happended at the interval ofδphase larger than the critical nucleation size.The peak nucleation occurred in the PPN,where the recrystallization nucleus were free of the penetration by the adjacent grains,before the nucleation incubation time was reached.Thus,a new feasible JNtheory was proposed to determine the maximum domain of recrystallization nucleation under close-set precipitated phases.All the possible nucleation sites were assumed under PPN in the JNtheory.As such,the original microstructure can be expected to design for the annealing via the aging process.A quantitative evaluation of recrystallization nucleation can also achieved in the Ni-based alloys during aging. | Guanqiang Wang Mingsong Chen Yongcheng Lin Hongbin Li Yuqiang Jiang Yanyong Ma Chengxu Peng Jinliang Cai Quan Chen | 2022 | Journal of Materials Science & Technology2022，，20： | 1 |
| 4 | A novel annealing method to uniformly refine deformed mixed grain microstructure of a solution-treated Ni-based superalloy显示文摘Increasing static recrystallization(SRX)nucleation rate and decreasing grain growth rate are the main ways to obtain uniform and fine grain microstructure by annealing treatment.However,it is contradictory to raise the SRX nucleation rate and reduce grain growth rate during isothermal annealing treatment.This is because the increase of the SRX nucleation rate needs to raise annealing temperature,while the decline of grain growth rate needs to reduce the annealing temperature.To solve the contradiction,a novel method named cooling recrystallization annealing treatment(CRT)is designed and verified.For the CRT,the relatively high annealing temperature in the primary stage can promote SRX nucleation,and the gradually decreased annealing temperature can reduce the growth rate of SRX grains.Besides,an aged treatment is first carried out to precipitate high content of theδphase before the CRT.Enoughδphases not only provide large numbers of sites for SRX nucleation but also limit the grain growth due to the pinning effect,especially in the primary high-temperature stage.The results show that the novel method can refine deformed mixed grain microstructure well when the suitable cooling rate,start and final recrystallization annealing temperatures are employed.The deformed mixed grain can be uniformly refined to an average size of 8.26μm with the route of 900℃×12 h+1020℃→970℃×20 min. | WANG GuanQiang CHEN MingSong LIN YongCheng LI HongBin ZENG WeiDong MA YanYong CAI JinLiang PENG ChengXu ZOU FenYang | 2021 | Science China(Technological Sciences)2021，64，8： | 1 |
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