Interpreting activity is considered a high-anxiety activity due to its immediacy, multitasking, complexity of cognitive processing, and uncertainty of cognitive processing. Research has shown that interpreting anxiety...Interpreting activity is considered a high-anxiety activity due to its immediacy, multitasking, complexity of cognitive processing, and uncertainty of cognitive processing. Research has shown that interpreting anxiety, as the biggest emotional obstacle in the interpreting process, is the main emotional factor that leads to individual differences in interpreting. Students often claim to have fear or anxiety behaviors in interpreting exams, interpreting competitions, and interpreting classes. However, the research on interpreting teaching attaches importance to the cultivation of language knowledge, cultural knowledge, and interpreting skills, and does not pay enough attention to emotional factors such as motivation and anxiety in interpreting learning, which makes it difficult for the cultivated interpreters to meet the requirements of professional practice. In recent years, virtual reality technology (VR) has been gradually applied in the field of foreign language and interpreting teaching for creating a real, interactive and experiential language learning environment. Situated Learning Theory stresses that the fundamental mechanism for learning to take place is for individuals to participate in the real context in which knowledge is generated, and to realize the construction of knowledge through the interaction with the community of practice and the environment. Virtual reality technology can satisfy the needs of language learners for real contexts by providing learners with immersive, imaginative and interactive scenario simulations, and has a certain positive effect on alleviating learning anxiety. Therefore, relying on the virtual simulation course “United Nations Kubuqi International Desert Ecological Science and Technology Innovation International Volunteer Language Service Practical Training System”, this paper adopts a combination of quantitative and qualitative analyses to investigate the interpretation anxiety level of the interpreter trainees and the factors affecting them in the VR situation to help them discover effective responses to interpreter anxiety.展开更多
Endometriosis is a common chronic gynecological disease with endometrial cell implantation outside the uterus.Angiogenesis is a major pathophysiology in endometriosis.Our previous studies have demonstrated that the pr...Endometriosis is a common chronic gynecological disease with endometrial cell implantation outside the uterus.Angiogenesis is a major pathophysiology in endometriosis.Our previous studies have demonstrated that the prodrug of epigallocatechin gallate(ProEGCG)exhibits superior anti-endometriotic and anti-angiogenic effects compared to epigallocatechin gallate(EGCG).However,their direct binding targets and underlying mechanisms for the differential effects remain unknown.In this study,we demonstrated that oral ProEGCG can be effective in preventing and treating endometriosis.Additionally,1D and 2D Proteome Integral Solubility Alteration assay-based chemical proteomics identified metadherin(MTDH)and PX domain containing serine/threonine kinase-like(PXK)as novel binding targets of EGCG and ProEGCG,respectively.Computational simulation and BioLayer interferometry were used to confirm their binding affinity.Our results showed that MTDH-EGCG inhibited protein kinase B(Akt)-mediated angiogenesis,while PXK-ProEGCG inhibited epidermal growth factor(EGF)-mediated angiogenesis via the EGF/hypoxia-inducible factor(HIF-1a)/vascular endothelial growth factor(VEGF)pathway.In vitro and in vivo knockdown assays and microvascular network imaging further confirmed the involvement of these signaling pathways.Moreover,our study demonstrated that ProEGCG has superior therapeutic effects than EGCG by targeting distinct signal transduction pathways and may act as a novel antiangiogenic therapy for endometriosis.展开更多
Clinically,arsenic trioxide(ATO)was applied to the treatment of acute promyelocytic leukemia(APL)as a reliable and effective frontline drug.However,the administration regimen of AsⅢwas limited due to its fast clearan...Clinically,arsenic trioxide(ATO)was applied to the treatment of acute promyelocytic leukemia(APL)as a reliable and effective frontline drug.However,the administration regimen of AsⅢwas limited due to its fast clearance,short therapeutic window and toxicity as well.Based on CD71 overexpressed on APL cells,in present study,a transferrin(Tf)-modified liposome(LP)was established firstly to encapsulate AsⅢin arsenic-nickel complex by nickel acetate gradient method.The AsⅢ-loaded liposomes(AsLP)exhibited the feature of acid-sensitive release in vitro.Tf-modified AsLP(Tf-AsLP)were specifically taken up by APL cells and the acidic intracellular environment triggered liposome to release AsⅢwhich stimulated reactive oxygen species level and caspase-3 activity.Tf-AsLP prolonged half-life of AsⅢin blood circulation,lowered systemic toxicity,and promoted apoptosis and induced cell differentiation at lesion site in vivo.Considering that ATO combined with RA is usually applied as the first choice in clinic for APL treatment to improve the therapeutic effect,accordingly,a Tf-modified RA liposome(Tf-RALP)was designed to reduce the severe side effects of free RA and assist Tf-AsLP for better efficacy.As expected,the tumor inhibition rate of Tf-AsLP was improved significantly with the combination of Tf-RALP on subcutaneous tumor model.Furthermore,APL orthotopic NOD/SCID mice model was established by 60CO irradiation and HL-60 cells intravenously injection.The effect of co-administration(Tf-AsLP+Tf-RALP)was also confirmed to conspicuous decrease the number of leukemia cells in the circulatory system and prolong the survival time of APL mice by promoting the APL cells’apoptosis and differentiation in peripheral blood and bone marrow.Collectively,Tf-modified acid-sensitive AsLP could greatly reduce the systemic toxicity of free drug.Moreover,Tf-AsLP combined with Tf-RALP could achieve better efficacy.Thus,transferrinmodified AsⅢliposome would be a novel clinical strategy to improve patient compliance,with promising translation prospects.展开更多
目的:探究头颈部鳞状细胞癌(head and neck squamous cell carcinoma,HNSCC)中磷酸化Zeste同源增强子(enhancer of Zeste homolog 2,EZH2)的表达特征及对化疗敏感性的影响。方法:选取2018年1月至2021年3月天津医科大学肿瘤医院HNSCC患...目的:探究头颈部鳞状细胞癌(head and neck squamous cell carcinoma,HNSCC)中磷酸化Zeste同源增强子(enhancer of Zeste homolog 2,EZH2)的表达特征及对化疗敏感性的影响。方法:选取2018年1月至2021年3月天津医科大学肿瘤医院HNSCC患者组织标本及临床资料53例。免疫组织化学染色分析HNSCC组织标本中p-EZH2^(S21)、p-STAT3^(Y705)、HIF-1α和Ki-67的表达水平。Western blot检测HNSCC组织和细胞株中p-EZH2^(S21)的表达情况。在HNSCC细胞中构建EZH2野生型(EZH2-WT)和EZH2^(S21)位点突变(EZH2-^(S21)A)的稳转细胞,CCK8实验和平板克隆实验检测EZH2以及^(S21)位点磷酸化对HNSCC细胞增殖能力及其对顺铂(cisplatin,DDP)和5-氟尿嘧啶(5-fluorouracil,5-FU)敏感性的影响。结果:HNSCC中p-EZH2^(S21)表达升高,并且与p-STAT3^(Y705)(P<0.05),HIF-1α(P<0.01)表达呈正相关。临床特征相关性分析发现HNSCC中p-EZH2^(S21)表达与淋巴结转移(P<0.0005)、T分期(P<0.05)、N分期(P<0.0001)和AJCC分期(P<0.05)呈正相关。体外实验证实EZH2表达促进HNSCC细胞增殖能力并且抑制其对化疗的敏感性,抑制EZH2^(S21)磷酸化可以恢复肿瘤细胞对DDP和5-FU的敏感性。结论:p-EZH2^(S21)在HNSCC肿瘤进展中具有重要作用,^(S21)位点磷酸化是EZH2影响HNSCC细胞增殖及其对化疗敏感性的重要途径。展开更多
Massive online courses(MOOCs)are becoming increasingly vital in the modern era,yet tools to track and detect MOOC learners’progress are inadequate.In reality,labeled MOOC data are difficult to acquire,whereas unlabel...Massive online courses(MOOCs)are becoming increasingly vital in the modern era,yet tools to track and detect MOOC learners’progress are inadequate.In reality,labeled MOOC data are difficult to acquire,whereas unlabeled data make up the majority of the data,and these massive unlabeled data are difficult to analyze,resulting in data waste.This paper tackles this issue by presenting a MOOC learning behavior anomaly detection model(M-ISFCM)for the supervision and inspection of MOOC learners’learning that combines semisupervised fuzzy C-mean clustering(SFCM)and an isolated forest algorithm.To optimize MOOC data usage,the model leverages unlabeled and labeledMOOCdata as prior assumptions.The MOOC detection runtimes are enhanced by integrating the outliers of the isolated forest approach in SFCM.The results show that the model has a higher precision rate,recall rate,andAUC than the traditional anomaly models in MOOC data.Therefore,the model is effective for recognizing anomalous MOOC learning behaviors.展开更多
文摘Interpreting activity is considered a high-anxiety activity due to its immediacy, multitasking, complexity of cognitive processing, and uncertainty of cognitive processing. Research has shown that interpreting anxiety, as the biggest emotional obstacle in the interpreting process, is the main emotional factor that leads to individual differences in interpreting. Students often claim to have fear or anxiety behaviors in interpreting exams, interpreting competitions, and interpreting classes. However, the research on interpreting teaching attaches importance to the cultivation of language knowledge, cultural knowledge, and interpreting skills, and does not pay enough attention to emotional factors such as motivation and anxiety in interpreting learning, which makes it difficult for the cultivated interpreters to meet the requirements of professional practice. In recent years, virtual reality technology (VR) has been gradually applied in the field of foreign language and interpreting teaching for creating a real, interactive and experiential language learning environment. Situated Learning Theory stresses that the fundamental mechanism for learning to take place is for individuals to participate in the real context in which knowledge is generated, and to realize the construction of knowledge through the interaction with the community of practice and the environment. Virtual reality technology can satisfy the needs of language learners for real contexts by providing learners with immersive, imaginative and interactive scenario simulations, and has a certain positive effect on alleviating learning anxiety. Therefore, relying on the virtual simulation course “United Nations Kubuqi International Desert Ecological Science and Technology Innovation International Volunteer Language Service Practical Training System”, this paper adopts a combination of quantitative and qualitative analyses to investigate the interpretation anxiety level of the interpreter trainees and the factors affecting them in the VR situation to help them discover effective responses to interpreter anxiety.
基金supported by the GRF RGC&CRF,Hong Kong(Grant Nos.:475012 and C5045-20 EF)HMRF,Hong Kong(Grant No.:03141386)+3 种基金ITF,Hong Kong(Grant No.:ITS/209/12)UGC Direct Grant 2011,2012,2021.032HKOG Trust Fund 2011,2014,2019the National Natural Science Foundation of China(Grant Nos.:81974225 and 82201823)。
文摘Endometriosis is a common chronic gynecological disease with endometrial cell implantation outside the uterus.Angiogenesis is a major pathophysiology in endometriosis.Our previous studies have demonstrated that the prodrug of epigallocatechin gallate(ProEGCG)exhibits superior anti-endometriotic and anti-angiogenic effects compared to epigallocatechin gallate(EGCG).However,their direct binding targets and underlying mechanisms for the differential effects remain unknown.In this study,we demonstrated that oral ProEGCG can be effective in preventing and treating endometriosis.Additionally,1D and 2D Proteome Integral Solubility Alteration assay-based chemical proteomics identified metadherin(MTDH)and PX domain containing serine/threonine kinase-like(PXK)as novel binding targets of EGCG and ProEGCG,respectively.Computational simulation and BioLayer interferometry were used to confirm their binding affinity.Our results showed that MTDH-EGCG inhibited protein kinase B(Akt)-mediated angiogenesis,while PXK-ProEGCG inhibited epidermal growth factor(EGF)-mediated angiogenesis via the EGF/hypoxia-inducible factor(HIF-1a)/vascular endothelial growth factor(VEGF)pathway.In vitro and in vivo knockdown assays and microvascular network imaging further confirmed the involvement of these signaling pathways.Moreover,our study demonstrated that ProEGCG has superior therapeutic effects than EGCG by targeting distinct signal transduction pathways and may act as a novel antiangiogenic therapy for endometriosis.
基金supported by the Science and Technology Commission of Shanghai Municipality (20S11902600)the National Natural Science Foundation of China (82172615)the PDH-SPFDU Joint Research Fund (RHJJ2018-05)
文摘Clinically,arsenic trioxide(ATO)was applied to the treatment of acute promyelocytic leukemia(APL)as a reliable and effective frontline drug.However,the administration regimen of AsⅢwas limited due to its fast clearance,short therapeutic window and toxicity as well.Based on CD71 overexpressed on APL cells,in present study,a transferrin(Tf)-modified liposome(LP)was established firstly to encapsulate AsⅢin arsenic-nickel complex by nickel acetate gradient method.The AsⅢ-loaded liposomes(AsLP)exhibited the feature of acid-sensitive release in vitro.Tf-modified AsLP(Tf-AsLP)were specifically taken up by APL cells and the acidic intracellular environment triggered liposome to release AsⅢwhich stimulated reactive oxygen species level and caspase-3 activity.Tf-AsLP prolonged half-life of AsⅢin blood circulation,lowered systemic toxicity,and promoted apoptosis and induced cell differentiation at lesion site in vivo.Considering that ATO combined with RA is usually applied as the first choice in clinic for APL treatment to improve the therapeutic effect,accordingly,a Tf-modified RA liposome(Tf-RALP)was designed to reduce the severe side effects of free RA and assist Tf-AsLP for better efficacy.As expected,the tumor inhibition rate of Tf-AsLP was improved significantly with the combination of Tf-RALP on subcutaneous tumor model.Furthermore,APL orthotopic NOD/SCID mice model was established by 60CO irradiation and HL-60 cells intravenously injection.The effect of co-administration(Tf-AsLP+Tf-RALP)was also confirmed to conspicuous decrease the number of leukemia cells in the circulatory system and prolong the survival time of APL mice by promoting the APL cells’apoptosis and differentiation in peripheral blood and bone marrow.Collectively,Tf-modified acid-sensitive AsLP could greatly reduce the systemic toxicity of free drug.Moreover,Tf-AsLP combined with Tf-RALP could achieve better efficacy.Thus,transferrinmodified AsⅢliposome would be a novel clinical strategy to improve patient compliance,with promising translation prospects.
基金supported by the National Natural Science Foundation of China (No.61906099)the Provincial Undergraduate Training Program for Innovation and Entrepreneurship (No.SYB2021019)the Open Fund of Key Laboratory of Urban Land Resources Monitoring and Simulation,Ministry of Natural Resources (No.KF-2019–04-065).
文摘Massive online courses(MOOCs)are becoming increasingly vital in the modern era,yet tools to track and detect MOOC learners’progress are inadequate.In reality,labeled MOOC data are difficult to acquire,whereas unlabeled data make up the majority of the data,and these massive unlabeled data are difficult to analyze,resulting in data waste.This paper tackles this issue by presenting a MOOC learning behavior anomaly detection model(M-ISFCM)for the supervision and inspection of MOOC learners’learning that combines semisupervised fuzzy C-mean clustering(SFCM)and an isolated forest algorithm.To optimize MOOC data usage,the model leverages unlabeled and labeledMOOCdata as prior assumptions.The MOOC detection runtimes are enhanced by integrating the outliers of the isolated forest approach in SFCM.The results show that the model has a higher precision rate,recall rate,andAUC than the traditional anomaly models in MOOC data.Therefore,the model is effective for recognizing anomalous MOOC learning behaviors.
