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10篇 您的检索式:作者名="Mengzhen Ding"
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1Resorbable polymer electrospun nanofibers:History,shapes and application for tissue engineering显示文摘Resorbable polymer electrospun nanofiber-based materials/devices have high surface-to-volume ratio and often have a porous structure with excellent pore interconnectivity,which are suitable for growth and development of different types of cells.Due to the huge advantages of both resorbable polymers and electrospun nano fibers,re sorbable polymer electrospun nanofibers(RPENs)have been widely applied in the field of tissue engineering.In this paper,we will mainly introduce RPENs for tissue engineering.Firstly,the electrospinning technique and electrospun nanofiber architectures are briefly introduced.Secondly,the application of RPENs in the field of tissue engineering is mainly reviewed.Finally,the advantages and disadvantages of RPENs for tissue engineering are discussed.This review will provide a comprehensive guide to apply resorbable polymer electrospun nanofibers for tissue engineering.Tingting Wu Mengzhen Ding Cuiping Shi Yiqun Qiao Panpan Wang Ruirui Qiao Xichang Wang Jian Zhong 2020Chinese Chemical Letters2020,31,3:8
2Gelatin-stabilized traditional emulsions:Emulsion forms,droplets,and storage stability显示文摘Fish oils are important substances in the field of food and drug delivery.Due to their unstable double bonds,fishy taste,and poor water solubility,it is pivotal to investigate novel dosage forms for fish oils,such as encapsulated droplets.In this work,we primarily prepared gelatin-stabilized fish oil-loaded traditional emulsions and investigated their emulsion forms,droplets,and storage stability under different preparation and storage conditions.Our results showed that higher gelatin solution pH,higher storage temperature in the range of 4–37℃,and increased storage time induced the emulsion form switch from a liquid form to a redispersible gel form of the fish oil emulsion.The droplets had core-shell microstructures and a trimodal size distribution,which decreases linearly with increasing gelatin solution pH and homogenizing time,but decreases exponentially with increasing homogenizing speed.In addition,storage temperature showed a notably different effect on traditional emulsion storage.This work provides a fundamental knowledge for the formation,microstructure,and properties of gelatin-based traditional emulsions.It also provides a promising new application for fish oil-loaded emulsions in food beverages,soft candy,and other food products.Mengzhen Ding Ting Zhang Huan Zhang Ningping Tao Xichang Wang Jian Zhong 2020Food Science and Human Wellness2020,9,4:3
3Preparation of multicore millimeter-sized spherical alginate capsules to specifically and sustainedly release fish oil显示文摘Specific and sustained release of nutrients from capsules to the gastrointestinal tract has attracted many attentions in the field of food and drug delivery.In this work,we reported a monoaxial dispersion electrospraying-ionotropic gelation technique to prepare multicore millimeter-sized spherical capsules for specific and sustained release of fish oil.The spherical capsules had diameters from 2.05 mm to 0.35 mm with the increased applied voltages.The capsules consisted of uniform(at applied voltages of≤10 k V)or nonuniform(at applied voltages of>10 k V)multicores.The obtained capsules had reasonable loading ratios(9.7%-6.3%)due to the multicore structure.In addition,the obtained capsules had specific and sustained release behaviors of fish oil into the small intestinal phase of in vitro gastrointestinal tract and small intestinal tract models.The simple monoaxial dispersion electrospraying-ionotropic gelatin technique does not involve complicated preparation formulations and polymer modification,which makes the technique has a potential application prospect for the fish oil preparations and the encapsulation of functional active substances in the field of food and drug industries.Lina Tao Panpan Wang Ting Zhang Mengzhen Ding Lijie Liu Ningping Tao Xichang Wang Jian Zhong 2023Food Science and Human Wellness2023,12,2:1
4Droplet and creaming stability of fish oil-loaded gelatin/surfactant-stabilized emulsions depends on both the adsorption ways of emulsifiers and the adjusted pH显示文摘The droplet and creaming stability of food emulsions stabilized by mixed emulsifiers is a research hotspot in the field of emulsions.In this work,we mainly explore the effect of pH change on the droplet and creaming stability of fish oil-loaded emulsions synergistically(Span 80 and SL)or competitively(Tween 80 and SDS)stabilized by gelatin/surfactant.The results demonstrated that initial droplet stability and droplet storage stability,and creaming stability of the pH-adjusted emulsions are dependent on both the adsorption ways of emulsifiers and the adjusted pH:(1)Competitively stabilized emulsions have more stable droplets than synergistically stabilized emulsions;(2)SDS-dominant competitively stabilized emulsions have more stable droplets than gelatin-dominant emulsions;(3)Basic pH-adjusted emulsions have more stable droplets than acidic pH-adjusted emulsions;(4)The synergistically stabilized emulsions at acidic pH have significantly higher creaming indexes than that at basic pH;and(5)The competitively stabilized emulsions have high or similar creaming indexes to that at acidic pH.Further,the mechanisms are proposed according to Stokes’Law.This work will provide useful information to understand the interfacial properties of mixed emulsifiers in the food emulsions and promising application perspective for the development of food beverages including acidic and alkali beverages.Ting Zhang Mengzhen Ding Xichang Wang Jian Zhong 2020Food Science and Human Wellness2020,9,3:0
5Optimization of Extraction Process and Anti-ultraviolet Activity of Polysaccharide from Cordyceps militaris显示文摘Extraction process of Cordyceps militaris polysaccharide(PS)was optimized with single factor experiment and orthogonal test.Then,the anti-UVB ability of the polysaccharide was investigated to develop anti-UV sun-screening agent through determining the cell viability after UVB irradiation.The results showed that the optimum were solid-liquid ratio at 1∶40(g/ml)at 80℃ for 4 h,and the extract ratio was 27.4%according to the verification test.The PS showed no cytotoxicity to HaCaT cells and pretreatment with the PS significantly decreased UVB-induced cytotoxicity in a dose-dependent relationship.It suggests that the PS has strong anti-UVB irradiation ability and has a good application prospect in developing sunscreen agent.Duofei WANG Mengzhen DING Huijuan ZHANG Liyan LI 2021Agricultural Biotechnology2021,10,2:0
6LncRNA KCNQ1OT1:Molecular mechanisms and pathogenic roles in human diseases显示文摘Long non-coding RNAs(lncRNAs)exhibit a length more than 200 nucleotides and they are characterized by non-coding RNAs(ncRNA)not encoded into proteins.Over the past few years,the role and development of lncRNAs have aroused the rising attention of researchers.To be specific,KCNQ1OT1,the KCNQ1 opposite strand/antisense transcript 1,is clearly classified as a regulatory ncRNA.KCNQ1OT1 is capable of interacting with miRNAs,RNAs and proteins,thereby affecting gene expression and various cell functions(e.g.,cell proliferation,migration,epithelialemesenchymal transition(EMT),apoptosis,viability,autophagy and inflammation).KCNQ1OT1 is dysregulated in a wide range of human diseases(e.g.,cardiovascular disease,cancer,diabetes,osteoarthritis,osteoporosis and cataract),and it is speculated to act as a therapeutic target for treating various human diseases.On the whole,this review aims to explore the biological functions,underlying mechanisms and pathogenic roles of KCNQ1OT1 in human diseases.Fangqi Xia Yaqi Wang Mengzhen Xue Leiqi Zhu Dengke Jia Yue Shi Yan Gao Luoying Li Yuanyang Li Silong Chen Guangfu Xu Ding Yuan Chengfu Yuan 2022Genes & Diseases2022,9,6:0
7Pre-mobilization platelet count predicts stem cell yield during mobilization in patients with multiple myeloma显示文摘Background Autologous hematopoietic stem cell(HSC)transplantation remains the recommended treatment for eligible patients with multiple myeloma(MM).Increasing the number of transplanted CD34^(+)cells shorten the time to hematopoietic reconstitution and increases the overall survival of patients.With the harvest of a sufficient CD34^(+)cell number being crucial,this study aimed to predict the factors that affect stem cell collection.Methods We conducted a retrospective study of 110 patients who were newly diagnosed with MM and underwent autologous HSC collection at Beijing Jishuitan Hospital between March 2016 and July 2022.Multiple factors were analyzed using the Mann-Whitney U tests for between-group comparisons.Differences were considered statistically significant at P<0.05.Results We found that patient age affected stem cell collection significantly;for patients younger than 55 years,the number of CD34^(+)cells harvested may be≥2×10^(6)/L,is unlikely to reach 5×10^(6)/L.Platelet count at initial mobilization was a predictor of the number of CD34^(+)cells collected.Collection may fail when the platelet count at initial mobilization is below 17×10^(9)/L and may be excellent when it is higher than 199×10^(9)/L.Conclusions This finding could guide us to predict the approximate number of CD34^(+)cells collected in advance during autologous transplant mobilization for MM and to decide in advance whether to apply plerixafor to improve the number of HSCs collected.Yuan Chen Shan Gao Yutong Wang Minqiu Lu Bin Chu Lei Shi Qiuqing Xiang Lijuan Fang Yuehua Ding Mengzhen Wang Xi Liu Xin Zhao Kai Sun Li Bao 2023Cancer Pathogenesis and Therapy2023,1,1:0
8A novel strategy for treating oncogene-mutated tumors by targeting tumor microenvironment and synergistically enhancing anti-PD-1 immunotherapy显示文摘Oncogenes are critical factors in tumorigenesis of diverse cancer types and play essential roles in tumor immune escape.Mutations in Kirsten rat sarcoma viral oncogene homolog(KRAS)and epidermal growth factor receptor(EGFR)are among the most frequent gain-of-function alterations[1].After many years of in-depth research,inhibitors targeting EGFR or KRAS mutations have been successfully developed,however,their clinical benefit is relatively limited,and they will inevitably encounter the challenge of drug resistance.The emergence of resistance is attributed to secondary mutations in driver genes and other complicated factors.Yingqiang Liu Linjiang Tong Mengge Zhang Qi Zhang Qiupei Liu Fang Feng Yan Li Mengzhen Lai Haotian Tang Yi Chen Meiyu Geng Wenhu Duan Jian Ding Hua Xie 2024Cancer Communications2024,44,3:0
92-Oxo-3,4-dihydropyrimido[4,5-d] pyrimidines as new reversible inhibitors of EGFR C797S(Cys797 to Ser797)mutant显示文摘Extensive structure-activity relationships(SARs)study of JND3229 was conducted to yield a series of new reve rsible 2-oxo-3,4-dihydropyrimido[4,5-d]pyrimidine privileged scaffold as EGFRC797 S inhibitors.One of the most potent compound 6 i potently suppressed EGFRL858 R/T790 M/C797 S kinase with an IC50 value of 3.1 nmol/L,and inhibited the proliferation of BaF3 cells harboring EGFRL858 R/T790 M/C797 S and EGFR19 D/T790 M/C797 S mutants with IC50 values of 290 nmol/L and 316 nmol/L,respectively.Further,6 i dose-dependently induced suppression of the phosphorylation of EGFRL858 R/T790 M/C797 S and EGFR19 D/T790 M/C797 S in BaF3 cells.Compound 6 i may serve as a promising lead compound for further drug discovery overcoming the acquired resistance of non-small cell lung cancer(NSCLC)patients.Xianglong Hu Qiuju Xun Tao Zhang Su-Jie Zhu Qian Li Linjiang Tong Mengzhen Lai Tao Huang Cai-Hong Yun Hua Xie Ke Ding Xiaoyun Lu 2020Chinese Chemical Letters2020,31,5:0
10Clinical characteristics and prognostic significance of immunoglobulin isotype switch in patients with multiple myeloma显示文摘Immunoglobulin(Ig)isotype switching in multiple myeloma(MM)is a rare form of clonal evolution.The aim of this study was to investigate the clinical features and prognostic significance of Ig isotype switching by observing Ig transformation in patients with relapse.A retrospective analysis was performed on 506 patients with newly diagnosed MM who were treated at our hospital from February 2005 to February 2020.The patients who experienced relapse were divided into the following four groups according to Ig phenotype:original paraprotein,complete isotype switching,light chain escape(LCE),and non-secretory clinical relapse.For comparative purposes with the original paraprotein group,the last three groups were pooled as the transformation group.Among the 506 included patients,376(74.3%)relapsed.Among them,13/376(3.5%)patients exhibited Ig isotype switching,including 3 with complete isotype switching,3 with LCE,and 7 with non-secretory clinical relapse.Eleven remained sensitive to therapy,exhibiting at least a partial response.Seven patients survived for at least 20 months after relapse.The median overall survival time of the LCE,clinical relapse,and complete isotype switching groups were 6,20,and 76 months,respectively,after recurrence.The clinical manifestations and Ig phenotypes of MM recurrence were different from those at the initial diagnosis in the 13 patients exhibiting Ig isotype switching.These differences vividly conveyed the heterogeneity of the clonal populations and provides direct clinical evidence for MM clonal evolution.Minqiu Lu Bin Chu Yutong Wang Lei Shi Shan Gao Lijuan Fang Qiuqing Xiang Xi Liu Yuehua Ding Yuan Chen Xin Zhao Mengzhen Wang Kai Sun Li Bao 2023Cancer Pathogenesis and Therapy2023,1,2:0
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