399 results on '"Chen, Yirong"'
Search Results
152. Screening and identification of specific markers for bladder transitional cell carcinoma from urine urothelial cells with suppressive subtractive hybridization and cDNA microarray
- Author
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Guo, Baihong, primary, Che, Tuanjie, additional, Shi, Baoguang, additional, Guo, Lijun, additional, Yin, Yongsheng, additional, Li, Lin, additional, Wang, Jinming, additional, Yan, Dongwen, additional, and Chen, Yirong, additional
- Published
- 2011
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153. Reply
- Author
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Li Yuan and Chen YiRong
- Subjects
Urology - Published
- 2011
154. Mining Concepts from Wikipedia for Ontology Construction
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Cui, Gaoying, primary, Lu, Qin, additional, Li, Wenjie, additional, and Chen, Yirong, additional
- Published
- 2009
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155. Attributes Selection in Chinese Ontology Acquisition with FCA
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CUI, GAOYING, primary, LU, QIN, additional, LI, WENJIE, additional, and CHEN, YIRONG, additional
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- 2008
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156. Automatic Construction of a Core Lexicon for Specific Domain
- Author
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Ji, Luning, primary, Lu, Qin, additional, Li, Wenjie, additional, and Chen, YiRong, additional
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- 2007
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157. Kojo Teikichi yu “Shiwubao.
- Author
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Chen Yirong
- Abstract
The translations in the periodical Current Affairs played an important role in the late Qing. Kojo Teikichi joined the paper at the request of Huang Zunxian and produced its "Japanese News Translations" column. During the life of the paper, Kojo produced 56 columns (issues) containing more than 600 translated articles, or about 340,000 characters in total. His translations comprised a large proportion of those published both in Current Affairs and in "Overseas News Translations." The translations covered a wide spectrum of issues and had a topical flavor. At the time, the Japanese News Translations column was the largest platform for introducing to China new vocabulary that had originated in Japan. It brought in a large number of new words and ideas, transmitted modern theories and knowledge, and enriched the Chinese people's knowledge of the west. The positive role played by Kojo Teikichi and his "Japanese News Translations" cannot be written off. [ABSTRACT FROM AUTHOR]
- Published
- 2010
158. Burden of migraine among Japanese patients: a cross-sectional National Health and Wellness Survey.
- Author
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Kikui, Shoji, Chen, Yirong, Todaka, Hiroshi, Asao, Keiko, Adachi, Kenji, and Takeshima, Takao
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ECONOMIC aspects of diseases , *HEALTH status indicators , *LABOR productivity , *MEDICAL needs assessment , *MEDICAL care use , *MEDICAL care costs , *MENTAL health , *MIGRAINE , *MULTIVARIATE analysis , *QUALITY of life , *CROSS-sectional method , *PRESENTEEISM (Labor) , *DESCRIPTIVE statistics - Abstract
Background: Limited studies have measured the burden of migraine in Japan. This study aimed at estimating the disease burden of migraine in Japan and identifying factors associated with the burden using the 2017 National Health and Wellness Survey. Methods: Migraine patients were defined by ICHD-3 like criteria with ≥4 monthly headache days (MHDs), and non-migraine respondents were selected using 1:4 propensity score matching. Multivariate analyses were conducted to compare Health-related Quality of Life (HRQoL), work productivity and activity impairment (WPAI), healthcare resource utilization (HRU) and costs between the two groups, and to identify factors associated with these outcomes in migraine patients. Results: In 30,001 respondents, 378 migraine patients were identified. Compared to matched controls (N = 1512), migraine patients had lower physical (45.17 vs. 49.89), mental (42.28 vs. 47.71) and role/social (37.91 vs. 44.19) component summary scores (p < 0.001). Migraine patients had higher absenteeism (6.4% vs. 2.2%), presenteeism (40.2% vs. 22.5%), total work productivity impairment (44.3% vs. 24.5%), total activity impairment (45.0% vs. 23.9%), indirect costs (1,492,520 JPY vs. 808,320 JPY) and more visits to healthcare providers in the past 6 months (7.23 vs. 3.96) (p < 0.001). More MHDs was associated with worse HRQoL, and higher HRU and indirect costs. Conclusions: Japanese migraine patients experience an incremental burden. This demonstrates the unmet needs among Japanese migraine patients. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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- View/download PDF
159. Stratigraphy and Structure of a South-Trending Structural High, Northern Arkoma Basin, Arkansas
- Author
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Chen, Yirong
- Subjects
- Earth sciences, Arkoma basin, Stratigraphy, Structural geology
- Abstract
The Arkoma Basin is a Carboniferous peripheral foreland basin in southeastern Oklahoma and west-central Arkansas. The formation of the Arkoma Basin is a result of a collision between the North American Plate and the Sabine Terrane. To the north of the basin, there is a structural high that extends southward from the Arkoma Shelf into the basin. This structure is in contrast with the prevailing east-trending strike of structures in the northern margin of the basin and is poorly defined. This paper examined the structure of the salient with stratigraphic and structural cross sections. Across the study area, two NS structural cross sections, three EW cross sections and one EW stratigraphic cross sections were constructed. Strata in the cross sections were divided into three intervals: Morrow I, Atoka I and Atoka II. Analysis of the five structural cross sections certified the existence of the structural high and defined the orientation and magnitude of the structural high. Examination of these three intervals in the stratigraphic cross section revealed no stratigraphic variation in thickness, so the structural high existed after middle Atokan time. The Arkoma Basin subsided at sometime after deposition of the Atoka II unit in northwest Arkansas.
- Published
- 2016
160. Sludge-derived biochar improves sludge electro-dewatering performance: Conductivity analysis.
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Yang, Yahong, Ma, Pengjin, Li, Yangying, Chen, Yirong, and Zhang, Huining
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CARBON-based materials , *CHARGE exchange , *RAMAN spectroscopy , *X-ray diffraction , *BIOCHAR - Abstract
The application of Coupled Electro-dewatering (EDW) with Carbon Materials has demonstrated significant potential in the efficient deep dewatering and solid-liquid separation of activated sludge. In this study, Fe-loaded sludge-based biochar (SBB) was synthesized via FeCl 3 impregnation, and the physicochemical properties of SBB were comprehensively characterized using XRD, Raman spectroscopy, BET analysis, FTIR, and XPS. The results demonstrated that the elevation of pyrolysis temperature facilitated the formation of graphitic carbon and graphitic nitrogen structures within the SBB, thereby augmenting current transport in the solid phase of the sludge. Meanwhile, the Fe material present on the surface of SBB undergoes dissolution in the sludge supernatant, thereby releasing Fe ions into the liquid phase and augmenting the conductivity of the liquid system. After the addition of SBB, the sludge showed an increase in Zeta potential and conductivity, along with a pH shift towards acidity, thus improving the conditions for EDW processes. The results obtained from the EDW analysis demonstrated that the application of SBB@800 significantly contributed to the enhancement of both initial current and dewatering limit, leading to a notable reduction in sludge water content from 57.2 % to 40.7 %. This study emphasizes the influence of temperature on physicochemical properties of SBB and its role in EDW, proposing an environmentally friendly approach for advanced sludge treatment using carbon materials and EDW synergy while providing insights for designing carbon materials to enhance EDW performance. [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2024
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161. Mitochondrial activity related genes of mast cells identify poor prognosis and metastasis of ovarian cancer.
- Author
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Ma, Xinghua, Ligan, Caryl, Huang, Shijia, Chen, Yirong, Li, Muxin, Cao, Yuanyuan, Zhao, Wei, and Zhao, Shuli
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DISEASE risk factors , *MAST cell tumors , *MAST cells , *EXTRACELLULAR matrix , *PROGNOSIS - Abstract
The pro-tumorigenic or anti-tumorigenic role of tumor infiltrating mast cells (TIMs) in tumors depends not only on the type of cancer and the degree of tumor progression, but also on their location in the tumor bulk. In our investigation, we employed immunohistochemistry to reveal that the mast cells (MCs) in the tumor stroma are positively correlated with metastasis of ovarian cancer (OC), but not in the tumor parenchyma. To delve deeper into the influence of different culture matrix stiffness on MCs' biological functions within the tumor parenchymal and stromal regions, we conducted a transcriptome analysis of the mouse MC line (P815) cultured in two-dimensional (2D) or three-dimensional (3D) culture system. Further research has found that the softer 3D extracellular matrix stiffness could improve the mitochondrial activity of MCs to promote proliferation by increasing the expression levels of mitochondrial activity-related genes, namely Pet100, atp5md, and Cox7a2. Furthermore, employing LASSO regression analysis, we identified that Pet100 and Cox7a2 were closely associated with the prognosis of OC patients. These two genes were subsequently employed to construct a risk score model, which revealed that the high-risk group model as one of the prognostic factors for OC patients. Additionally, the XCell algorithm analysis showed that the high-risk group displayed a broader spectrum of immune cell infiltrations. Our research revealed that TIMs in the tumor stroma could promote the metastasis of OC, and mitochondrial activity-related proteins Pet100/Cox7a2 can serve as biomarkers for prognostic evaluation of OC. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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162. Decursin ameliorates carbon-tetrachloride-induced liver fibrosis by facilitating ferroptosis of hepatic stellate cells.
- Author
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Que, Renye, Cao, Mengxing, Dai, Yancheng, Zhou, Yi, Chen, Yirong, and Lin, Liubing
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CARBON tetrachloride , *HEPATIC fibrosis , *LIVER cells , *TRANSFORMING growth factors , *CYCLOOXYGENASES , *GLUTATHIONE peroxidase - Abstract
Decursin possesses the potential to alleviate transforming growth factor (TGF)-β-induced hepatic stellate cells (HSCs) activation. However, the mechanisms by which decursin alleviates hepatic fibrosis remain not fully understood. Our aim is to explore the function of decursin on regulating HSCs' activation and hepatic fibrosis. The anti-fibrotic effect of decursin was evaluated by Masson and Sirius red staining, and immunohistochemical (IHC) and quantitative real-time PCR (qRT-PCR) analyses for alpha-smooth muscle actin (α-SMA) and collagen type I (Col1α1) expression. Ferroptosis was assessed by measuring iron concentration, glutathione peroxidase 4 (Gpx4), and prostaglandin endoperoxide synthase 2 (Ptgs2) expression, glutathione (GSH) level, lipid peroxidation, and reactive oxygen species (ROS) level. We found that decursin treatment decreased carbon tetrachloride (CCl4)-induced liver fibrosis. The primary HSCs isolated from decursin-treated group showed an increased Fe2+, lipid ROS level, and decreased Gpx4 and GSH levels compared with HSCs from the model group. Moreover, decursin promoted ferroptosis in activated HSCs in vitro, as evidenced by declined Gpx4 and GSH levels, increased Fe2+, ROS, and Ptgs2 levels compared with control. More important, ferroptosis inhibitor destroyed the anti-fibrosis effect of decursin on HSCs. In summary, these data suggest that decursin has potential to treat hepatic fibrosis. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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163. Enzyme-accelerated catalytic DNA circuits enable rapid and one-pot detection of bacterial pathogens.
- Author
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Li, Baolin, Jiang, Hui, Luo, Sijian, Zeng, Zhangrui, Xu, Xuejing, Li, Xinyu, Zhang, Songzhi, Chen, Yirong, Ding, Shijia, Li, Xinmin, Liu, Jinbo, and Chen, Wei
- Subjects
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DEOXYRIBOZYMES , *COMPLEX matrices , *HAIRPIN (Genetics) , *PATHOGENIC bacteria , *BACTERIAL diseases - Abstract
Catalytic DNA circuits, serving as signal amplification strategies, can enable simple and accurate detection of pathogenic bacteria in complex matrices but suffer from low reaction rates and depths. Herein, we design an enzyme-accelerated catalytic hairpin assembly (EACHA) in which duplex DNA products are converted into hairpin reactants to continue participating in the next circuit reaction with the assistance of RNase H. Profiting from the high recyclability of the reactants, EACHA exhibits an approximately 37.6-fold enhancement in the rate constant and a two-order-of-magnitude improvement in sensitivity compared to conventional catalytic hairpin assembly (CHA). By integrating an allosteric probe with EACHA, a one-pot method is developed for rapid and direct detection of S. enterica Enteritidis (S. Enteritidis). This method is capable of detecting 15 CFU mL−1 of S. Enteritidis within 20 min, which is superior to that of real-time PCR. By testing 60 milk samples, we demonstrate this method's high accuracy in discriminating contaminated samples, with an area under the curve (AUC) of 0.997. Moreover, this method can be employed to accurately diagnose early-stage infected mice, with an AUC of 1.00 for feces samples and 0.986 for serum samples. Therefore, this study offers a simple and feasible method for identifying pathogens in complex matrices. • We successfully developed an EACHA characterized by a high reaction rate and depth. • EACHA could detect S. Enteritidis using one-pot method in complex matrices. • The method has the potential to diagnose bacterial infections. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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164. Study on the exfoliation mechanism of graphene nanoplatelets in the polypropylene/graphene nanoplatelets composites under the elongational flow generated by convergent-divergent channels.
- Author
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Xu, Ziwei, Deng, Jingyi, Lai, Yongjian, Chen, Jianming, Chen, Yirong, Huang, Shijun, Chen, Anfu, Zhang, Jingjing, and Lei, Caihong
- Subjects
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NANOPARTICLES , *GRAPHENE , *POLYMER melting , *THERMAL conductivity , *NANOSTRUCTURED materials - Abstract
Exfoliation of graphene nanoplatelets (GNP) in polymer melts is one of the key challenges when applying melt mixing for preparing polymer-based composite. And the GNP can be exfoliated better within the polymer matrix under the elongational flow field than under the shear flow field. Here, we design three extrusion dies with different convergent-divergent channels to explore the exfoliation mechanism of GNP in polymer melt under elongational flow. The flow field in the convergent-divergent channels is numerically simulated, and the results demonstrate that elongational flow plays a dominant role in the convergent-divergent channel when compared to shear flow. The exfoliation states of GNP in different channels are assessed by the thickness and interlayer space of GNP using analysis of scanning electron micrographs, transmission electron micrographs, and X-ray diagrams. And a significant enhancement (increased by 103%) in the in-plane thermal conductivity of PP (polypropylene)/GNP composites extruded by the designed convergent-divergent channel further demonstrates the GNP are exfoliated efficiently under the elongational flow. Furthermore, an exfoliation model is used to estimate the required stress and explore the exfoliation mechanism of GNP. And the exfoliation mechanism of GNP is associated with the applied stress and the angle between the applied stress and the normal direction of GNP. This work could provide experimental and theoretical guidance for the preparation of high-performance composite filled with layered nanosheets. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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165. Novel method to decrease the exposure time of the extraction string of the ureteral stent and its efficiency and safety verification in the clinic.
- Author
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Hu, WenGang, Song, YaJun, Li, Yang, Li, YueHua, Mu, Jiao, Zhong, Xiao, Chen, YiRong, Wu, RongHua, Xiao, Ya, and Huang, ChiBing
- Subjects
- *
SURGICAL stents , *MEDICAL care costs , *DEMOGRAPHIC characteristics , *URETHRA , *CLINICS , *URETEROSCOPY - Abstract
Ureteral stent removal by an extraction string is advantageous. However, the increased risk of complications attributed to the continuous exposure of the string outside the urethra must be managed. This paper introduces a method to decrease the exposure time, and conducts a retrospective study to verify its efficiency and safety. A total of 231 male patients undergoing routine ureteroscopy (URS) were included, and all of them accepted indwelling ureteral stents with strings. Among them, 123 patients (Normal-S group) underwent the normal method to determine the length of string (Lstring), which was shortened to 4 cm (cm) past the urethral meatus; 108 patients (Novel-S group) underwent the novel method (Lstring = Lurethra + 2 cm), the length of urethra (Lurethra) was measured during ureteroscopy by ureteroscope body. The demographic characteristics, stent indwelling and removal-related variables, complications, and medical costs in each group were recorded. There was no significant difference in demographic characteristics, the rate of UTI, the operative duration of URS, or the VAS pain scores for stent removal between the 2 groups. For the Novel-S group, the stent dwelling time was longer, the self-rated discomfort and symptom, the stent dislodgement rate, the numbers of clinic or emergency visits and the overall medical cost post operation was lower in comparison with the Normal-S group, while the rate of removal of stents by hand was lower, the time for removing ureteral stents was longer. This novel method improved stenting comfort, avoided ureteral stent dislodgement, decreased complications, and lowered medical costs, it was safe and reliable and merits widespread application. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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166. Impact of neovascular age-related macular degeneration: burden of patients receiving therapies in Japan.
- Author
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Honda, Shigeru, Yanagi, Yasuo, Koizumi, Hideki, Chen, Yirong, Tanaka, Satoru, Arimoto, Manami, and Imai, Kota
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- *
MACULAR degeneration , *EYE diseases , *OPHTHALMOLOGISTS , *BLINDNESS , *MEDICAL personnel - Abstract
The chronic eye disorder, neovascular age-related macular degeneration (nAMD), is a common cause of permanent vision impairment and blindness among the elderly in developed countries, including Japan. This study aimed to investigate the disease burden of nAMD patients under treatment, using data from the Japan National Health and Wellness surveys 2009–2014. Out of 147,272 respondents, 100 nAMD patients reported currently receiving treatment. Controls without nAMD were selected by 1:4 propensity score matching. Healthcare Resource Utilisation (HRU), Health-Related Quality of Life (HRQoL), and work productivity loss were compared between the groups. Regarding HRU, nAMD patients had significantly increased number of visits to any healthcare provider (HCP) (13.8 vs. 8.2), ophthalmologist (5.6 vs. 0.8), and other HCP (9.5 vs. 7.1) compared to controls after adjusting for confounding factors. Additionally, nAMD patients had reduced HRQoL and work productivity, i.e., reduced physical component summary (PCS) score (46.3 vs. 47.9), increased absenteeism (18.14% vs. 0.24%), presenteeism (23.89% vs. 12.44%), and total work productivity impairment (33.57% vs. 16.24%). The increased number of ophthalmologist visits were associated with decreased PCS score, increased presenteeism and total work productivity impairment. The current study highlighted substantial burden for nAMD patients, requiring further attention for future healthcare planning and treatment development. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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167. Characteristics and health burden of the undiagnosed population at risk of chronic obstructive pulmonary disease in China.
- Author
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Koch, Marco, Butt, Thomas, Guo, Wudong, Li, Xue, Chen, Yirong, Tan, Diana, and Liu, Gordon G.
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OBSTRUCTIVE lung diseases , *OBSTRUCTIVE lung disease diagnosis , *QUALITY of life , *HEALTH & Nutrition Examination Survey , *PULMONARY function tests , *PUBLIC health - Abstract
Background: Chronic obstructive pulmonary disease (COPD) is a leading cause of morbidity and mortality in China. However, identifying patients has proved challenging, resulting in widespread under-diagnosis of the condition. We examined the prevalence of COPD diagnosis and COPD risk among adults in urban mainland China, the factors associated with having a COPD diagnosis or COPD risk, and the healthcare resource use and health outcomes of these groups compared with controls.Methods: Respondents to the 2017 National Health and Wellness Survey in China (n = 19,994) were classified into three groups: 'COPD Diagnosed', 'COPD Risk (undiagnosed)', and Control (unaffected), based on their self-reported diagnosis and Lung Function Questionnaire (LFQ) score. The groups were characterised by sociodemographic, health-related quality of life (HRQoL), productivity impairment, and healthcare resource use. Pairwise comparisons (t tests and chi-squared tests) and multivariable regression analyses were used to investigate factors associated with being at risk of, or diagnosed with, COPD.Results: 3320 (16.6%) respondents had a suspected risk of COPD but did not report receiving a diagnosis. This was projected to 105.3 million people, or 16.9% of adult urban Chinese. Of these respondents with an identified risk, only 554 (16.7%) were aware of COPD by name. Relative to those without COPD, those with a risk of COPD (undiagnosed) had significantly greater healthcare resource use, lower productivity and lower HRQoL not only compared to those without COPD, but also compared to people with a COPD diagnosis. Factors associated with increased odds of being at risk of COPD were older age, smoking, alcohol consumption, overweight BMI, occasional exercise, higher comorbidities, asthma diagnosis, being female, lower education, not being employed, and living in a high pollution province (p < 0.05).Conclusions: There is a substantial group of individuals, undiagnosed, but living with a risk of COPD, who have impaired HRQoL, lower productivity and elevated healthcare resource use patterns. Case-detection tools such as the LFQ may prove a quick and cost-effective approach for identifying these at-risk individuals for further definitive testing and appropriate treatment in China. [ABSTRACT FROM AUTHOR]- Published
- 2019
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168. A simple and smart AND-gate DNA nanoprobe for correlated enzymes tracking and cell-selective imaging.
- Author
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Zeng, Zijie, Guo, Bianqin, Li, Xingrong, Fu, Xuhuai, Chen, Yirong, Wu, Haiping, Zhang, Lu, Chen, Junman, and Ding, Shijia
- Subjects
- *
ENDOENZYMES , *ENZYMES , *TELOMERASE , *ENDONUCLEASES , *DNA , *DRUG therapy , *CANCER cells - Abstract
Accurate cancer diagnosis and effective drug therapy entail sensitive and dynamic monitoring of intracellular key enzymes, since their expression level is closely related to disease progression. Simultaneous monitoring of correlated enzymes is promising to help unveiling mystery of cytobiological events during tumor progression and drug response, while is challenged by lacking of a robust and simple simultaneous detection strategy. In order to construct a simple and smart strategy which is complex design-avoided and doesn't need other auxiliary enzyme, here we develop an AND-gate strategy for simultaneously monitoring correlated enzymes which both are upregulated in cancer cells (telomerase and apurinic/apyrimidinic endonuclease 1). An innovative AND-gate DNA nanoprobe has been designed to avoid mutual interference and background noise, guaranteeing an enhanced fluorescent signal output upon catalyzation of dual enzymes. This AND-gate strategy achieves sensitive detection of two enzymes in an individual manner in test tube, through which the diagnostic potential of bladder cancer has been validated by telomerase detection in clinical urine sample. The AND-gate strategy enables specific intracellular imaging of dual enzymes in different cancer cell lines. Importantly, in contrast to traditional single-targeting strategies, AND-gate imaging of dual enzymes significantly improves cancer cell selectivity. Moreover, this strategy dynamically monitors enzymatic activity changes during chemoresistance induced by chemotherapeutic treatment. This simple and smart strategy has foreseeable prospect in the fields of disease diagnosis, drug prognosis evaluation, and precise fluorescence-guided surgery. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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169. Janus wireframe DNA cube-based 3D nanomachine for rapid and stable fluorescence detection of exosomal microRNA.
- Author
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Xu, Yuan, Li, Xinmin, Niu, Changchun, Wu, Haiping, Yong, Yutao, Qi, Caihong, Gong, Wei, Bai, Huijie, Chen, Yirong, Ding, Shijia, and Liao, Pu
- Subjects
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EXOSOMES , *DNA , *FLUORESCENCE , *MICRORNA , *DETECTION limit - Abstract
Exosomal microRNAs (miRNAs) have been demonstrated to be credible biomarkers for the diagnosis and monitoring of tumors. Nevertheless, developing simple, rapid, and stable biosensing strategies that are capable of accurately detecting exosomal miRNAs remains a challenge. Herein, an accelerated and biostable three-dimensional (3D) nanomachine based on Janus wireframe DNA cube was constructed for sensitive fluorescence measurement of exosomal miRNA. The Janus wireframe DNA cube could propel target exosomal miRNA-21 rapid movement on its surface by catalytic hairpin assembly (CHA), releasing a massive fluorescence signal. Benefiting from the Janus wireframe DNA cube, the developed 3D nanomachine exhibited significantly improved reaction rate and enhanced biostability in complex biofluids compared to conventional CHA. As a result, this fluorescence biosensing strategy achieved rapid, stable, and single-step detection of exosomal miRNA-21 with the detection limit down to the picomole level. Therefore, this work offers a brief sensing tool for nucleic acid biomarkers detection, which has great application potential in tumor diagnosis. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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170. Preparation and bioactivity of TiO2 nanotube arrays containing calcium and phosphorus
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Xiao, Xiufeng, Liang, Jianhe, Tang, Haizhen, Yang, Xiaojuan, Liu, Rongfang, and Chen, Yirong
- Subjects
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BIOACTIVE compounds , *TITANIUM oxides , *NANOTUBES , *CALCIUM , *PHOSPHORUS , *GLYCERIN - Abstract
Abstract: With NH4H2PO4 and NH4F glycerin/water mixed solvent as electrolyte, through the anodic oxidation and calcium hydroxide hydrothermal treatment, TiO2 nanotube arrays containing calcium and phosphorus were prepared. Moreover, the influence of the processing time, titania crystalline phase and pH value of the solution were investigated. And the bioactivity of the nanotube arrays were examined by soaking in simulated body fluid. The results showed that the TiO2 nanotube arrays prepared in the phosphate-containing glycerin system can contain a small amount of phosphorus. When the processing time <0.5h, the nanotube arrays maintained the original tubular structure, but the quantity of Ca element reduces. When the processing time was ≥2h, the original tubular structure of the anatase nanotube arrays was transferred into nano four pillars, and with extending the processing time, the sizes of nano four pillars were slightly increased. But the morphology of the as-prepared nanotube arrays changed very slightly. And a content of Ca element increased with the increase in the hydrothermal treatment time. The existence form of Ca element is calcium titanate. The samples after hydrothermal treatment in saturated Ca(OH)2 solution are clearly more efficient in promoting apatite formation than the as-prepared or anatase nanotube arrays. [Copyright &y& Elsevier]
- Published
- 2012
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171. Modulation of Nitric Oxide on Lymphokine-activated Killer Cells in Patients with Bladder Cancer.
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Wang Zhiping, Fu Shengjun, Chen Yirong, and Qin Dashan
- Subjects
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NITRIC oxide , *LYMPHOKINES , *BLADDER cancer - Abstract
Examines the role of nitric oxide in the activation of lymphokine-activated killer (LAK) cells among patients with bladder cancer in China. Cytotoxicity of LAK cells; Determination of the activity of nitric oxide synthase in LAK cells; Inhibition of sodium nitroprusside.
- Published
- 2001
172. Treatment options for infected bone defects in the lower extremities: free vascularized fibular graft or Ilizarov bone transport?
- Author
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Ren, Gao-hong, Li, Runguang, Hu, Yanjun, Chen, Yirong, Chen, Chaojie, and Yu, Bin
- Subjects
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LEG physiology , *FEMUR physiology , *TIBIA physiology , *BONE diseases , *COMPARATIVE studies , *OSTEOMYELITIS , *SURGICAL complications , *TRANSPLANTATION of organs, tissues, etc. , *TREATMENT effectiveness , *RETROSPECTIVE studies , *DESCRIPTIVE statistics , *SURGICAL blood loss - Abstract
Objective: The objective was to explore the relative indications of free vascularized fibular graft (FVFG) and Ilizarov bone transport (IBT) in the treatment of infected bone defects of lower extremities via comparative analysis on the clinical characteristics and efficacies. Methods: The clinical data of 66 cases with post-traumatic infected bone defects of the lower extremities who underwent FVFG (n = 23) or IBT (n = 43) from July 2014 to June 2018 were retrieved and retrospectively analyzed. Clinical characteristics, operation time, and intraoperative blood loss were statistically compared between two groups. Specifically, the clinical efficacies of two methods were statistically evaluated according to the external fixation time/index, recurrence rate of deep infection, incidence of complications, the times of reoperation, and final functional score of the affected extremities. Results: Gender, age, cause of injury, Gustilo grade of initial injury, proportion of complicated injuries in other parts of the affected extremities, and numbers of femoral/tibial defect cases did not differ significantly between treatment groups, while infection site distribution after debridement (shaft/metaphysis) differed moderately, with metaphysis infection little more frequent in the FVFG group (P = 0.068). Femoral/tibial defect length was longer in the FVFG group (9.96 ± 2.27 vs. 8.74 ± 2.52 cm, P = 0.014). More patients in the FVFG group presented with moderate or complex wounds with soft-tissue defects. FVFG treatment required a longer surgical time (6.60 ± 1.34 vs. 3.12 ± 0.99 h) and resulted in greater intraoperative blood loss (873.91 ± 183.94 vs. 386.08 ± 131.98 ml; both P < 0.05) than the IBT group, while average follow-up time, recurrence rate of postoperative osteomyelitis, degree of bony union, and final functional scores did not differ between treatment groups. However, FVFG required a shorter external fixation time (7.04 ± 1.72 vs. 13.16 ± 2.92 months), yielded a lower external fixation index (0.73 ± 0.28 vs. 1.55 ± 0.28), and resulted in a lower incidence of postoperative complications (0.87 ± 0.76 vs. 2.21±1.78, times/case, P < 0.05). The times of reoperation in the two groups did not differ (0.78 ± 0.60 vs. 0.98 ± 0.99 times/case, P = 0.615). Conclusion: Both FVFG and IBT are effective methods for repairing and reconstructing infected bone defects of the lower extremities, with unique advantages and limitations. Generally, FVFG is recommended for patients with soft tissue defects, bone defects adjacent to joints, large bone defects (particularly monocortical defects), and those who can tolerate microsurgery. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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- View/download PDF
173. Evaluating influence of filling fraction of carriers packed in anaerobic side-stream reactors on membrane fouling and microbial community of the coupled membrane bioreactors.
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Zheng, Yue, Zhou, Zhen, Jiang, Lingyan, Huang, Jing, Jiang, Jie, Chen, Yirong, Shao, Yanjun, Yu, Siqi, Wang, Kaichong, Huang, Jianping, and Wang, Zhiwei
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MEMBRANE reactors , *MICROBIAL communities , *ANAEROBIC reactors , *FOULING , *SLUDGE bulking , *MICROBIAL products , *UPFLOW anaerobic sludge blanket reactors , *SLUDGE management - Abstract
• Anaerobic side-stream reactor (ASSR) coupled MBR was proposed for sludge reduction. • Effect of filling fractions of carriers in ASSR on membrane fouling (MF) was studied. • 25 % carriers alleviated MF by promoting hydrolysis and reducing sludge viscoelastic. • 50 % carriers improved MF little due to the increase of shear forces to biofilm. • MiSeq revealed biomarkers related to severe MF easily attached on membrane surface. An anoxic/oxic membrane bioreactors (AO-MBR) and three identical anaerobic side-stream reactor coupled with anoxic/oxic membrane bioreactors (ASSR-MBR) were constructed and operated in parallel to investigate the appropriate filling fraction of carriers packed in ASSR, influences on pollutants removal, sludge reduction, membrane fouling and microbial community of ASSR-MBR. Inserting ASSR achieved efficient COD removal and nitrification, and packing carriers in ASSR obtained the highest sludge reduction efficiency of 50.5 % at filling fraction of 25 %. Compared to AO-MBR, inserting ASSR without carriers induced the release of viscous components in extracellular polymeric substances (EPS) and the formation of calcium carbonate-related bacteria on membrane surface, and thus deteriorated membrane fouling. Packing carriers with 25 % filling fraction promoted the hydrolysis of soluble microbial products and EPS, whilst reduced the viscoelasticity of sludge flocs. Higher filling fraction of 50 % increased the shear forces to the biofilm and biomarkers related to membrane fouling, and thus showed little improvement to alleviate membrane fouling. MiSeq sequencing revealed that although it enriched in the bulk sludge of conventional ASSR-MBR and the coupled reactor with filling fraction of 50 %, the floc-forming, hydrolytic and fermentative bacteria were more inclined to attach on the membrane surface and alleviate fouling process. [ABSTRACT FROM AUTHOR]
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- 2020
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174. 'Tantao zai jieqing pingtai shang chuangzao caifu de chenggong zhi dao' (An Exploration for the Success of Turning Festivals into a Platform for Wealth Creation)
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Feng, C and Chen Yirong
- Abstract
Turning festivals into a platform for wealth creation is one of remarkable successful stories in China during the era of reform and opening to the outside world. This chapter examines key factors contributing to the rapid development of the festival industry or festival economy in Ningbo, a city on the east coast of China. In particular, it explores the connection between the development of the festival industry and the Chinese traditional philosophy of pragmatism, the Ningbo variety of Buddhism, and the Ningbo tradition of commercial culture.
- Published
- 2011
175. GlycoSS: A DNA Glycosignal Sieve for Deciphering Spatially Resolved EpCAM-Specific Glycoforms.
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Fan N, Yang K, Bian X, Chen Y, Zhang L, Ai Z, Li X, Ding S, Li S, and Cheng W
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- Humans, Glycosylation, Polysaccharides chemistry, Polysaccharides metabolism, MCF-7 Cells, Epithelial Cell Adhesion Molecule metabolism, Epithelial Cell Adhesion Molecule chemistry, Epithelial-Mesenchymal Transition, DNA chemistry, DNA metabolism
- Abstract
Malignant transformation of cancer is often accompanied by aberrant glycopatterns. Epithelial-mesenchymal transition (EMT) is a crucial biological process in cancer migration and invasion, accelerating cancer deterioration. High-precision analysis of protein-glycan spatial profiling in the EMT process is essential for elucidating glycosylation functions and cancer progression. However, the diversity of glycans in composition and conformation complicates their spatial analysis. Here, we develop a DNA glycosignal sieve (GlycoSS) visualization platform for screening glycoform expression with a protein spatial dimension. GlycoSS utilizes protein-anchored DNA nanoscanners of distinct lengths to control glycosignal readout, enabling protein-glycan distance modulations, and simultaneously orthogonally amplify glycoform output through signal amplification by an exchange reaction. Using GlycoSS, we screened EpCAM-specific hypoglycosylated glycoform signals in different breast cancer cell subtypes, especially characterizing the spatial distribution of glycans on the MCF-7 cell surface. Considering that the EpCAM-specific N -glycan dysregulation in EMT is pivotal, GlycoSS revealed dynamic glycan fluctuations during IGF-1-induced EMT, revealing that the N -glycans were positively associated with tumor malignancy and metastasis. GlycoSS is anticipated to accelerate the identification of aberrant N -glycosylation in tumor progression, advancing systemic glycobiology insights. Notably, GlycoSS is capable of analyzing diverse glycoprotein profiles, offering additional dimensions into the role of glycoprotein nanoenvironments in regulating membrane protein function.
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- 2024
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176. ETS1 deficiency in macrophages suppresses colorectal cancer progression by reducing the F4/80+TIM4+ macrophage population.
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Cao Y, Guo A, Li M, Ma X, Bian X, Chen Y, Zhang C, Huang S, Zhao W, and Zhao S
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- Animals, Humans, Mice, Mice, Knockout, Macrophages metabolism, Macrophages immunology, Disease Progression, Proto-Oncogene Mas, Male, Gene Expression Regulation, Neoplastic, Colorectal Neoplasms pathology, Colorectal Neoplasms genetics, Colorectal Neoplasms metabolism, Colorectal Neoplasms immunology, Proto-Oncogene Protein c-ets-1 metabolism, Proto-Oncogene Protein c-ets-1 genetics, Tumor Microenvironment immunology, Tumor-Associated Macrophages metabolism, Tumor-Associated Macrophages immunology
- Abstract
Tumor-associated macrophages (TAMs) take on pivotal and complex roles in the tumor microenvironment (TME); however, their heterogeneity in the TME remains incompletely understood. ETS proto-oncogene 1 (ETS1) is a transcription factor that is mainly expressed in lymphocytes. However, its expression and immunoregulatory role in colorectal cancer (CRC)-associated macrophages remain unclear. In the study, the expression levels of ETS1 in CD68+ macrophages in the CRC microenvironment were significantly higher than those in matched paracarcinoma tissues. Importantly, ETS1 increased the levels of chemokines C-C motif chemokine ligand 2 (CCL2) and C-X-C motif chemokine ligand 10 (CXCL10) in lipopolysaccharide-stimulated THP-1 cells. It also boosted the migration and invasion of CRC cells during the in vitro co-culture. In the ETS1 conditional knockout mouse model, ETS1 deficiency in macrophages ameliorated the histological changes in DSS-induced ulcerative colitis mouse models and prolonged the survival in an azomethane/dextran sodium sulfate (AOM/DSS)-induced CRC model. ETS1 deficiency in macrophages substantially inhibited tumor formation, reduced F4/80+TIM4+ macrophages in the mesenteric lymph nodes, and decreased CCL2 and CXCL10 protein levels in tumor tissues. Moreover, ETS1 deficiency in macrophages effectively prevented liver metastasis of CRC and reduced the infiltration of TAMs into the metastasis sites. Subsequent studies have indicated that ETS1 upregulated the expression of T-cell immunoglobulin mucin receptor 4 in macrophages through the signal transducer and activator of the transcription 1 signaling pathway activated by the autocrine action of CCL2/CXCL10. Collectively, ETS1 deficiency in macrophages potentiates antitumor immune responses by repressing CCL2 and CXCL10 expression, shedding light on potential therapeutic strategies for CRC., (© The Author(s) 2024. Published by Oxford University Press. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.)
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- 2024
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177. The effect mechanism of perceived entrepreneurial environment on Chinese college students' entrepreneurial intention: chain mediation model test.
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Lin Q, Chen Y, Lai J, and Zhang X
- Abstract
Introduction: This study aimed to explore the effect of perceived entrepreneurial environment among Chinese college students' entrepreneurial intention and its underlying mechanism., Methods: Based on a survey of 445 college students from 5 universities with the perceived entrepreneurial environment assessment scale, the achievement motivation scale, the entrepreneurial self-efficacy scale, and the entrepreneurial intention questionnaire., Results: There were significant correlations among perceived entrepreneurial environment, achievement motivation, entrepreneurial self-efficacy, and entrepreneurial intention, and perceived entrepreneurial environment could significantly positively predict entrepreneurial intention. Achievement motivation and entrepreneurial self-efficacy played significant mediating roles between the perceived entrepreneurial environment and entrepreneurial intention. There were three paths that perceived entrepreneurial environment to influence entrepreneurial intention: One was the mediating role of achievement motivation; The second was the mediating role of entrepreneurial self-efficacy; The third was the chain-mediated role of both achievement motivation and entrepreneurial self-efficacy., Discussion: The internal mechanism of the relationship between perceived entrepreneurial environment and entrepreneurial intention enriches the research results of entrepreneurial psychology among college students and provides a theoretical basis for training and guiding the entrepreneurship of college students., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Lin, Chen, Lai and Zhang.)
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- 2024
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178. Functionalized tetrahedral DNA frameworks for the capture of circulating tumor cells.
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Chen Y, Lin M, Ye D, Wang S, Zuo X, and Li M
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- Humans, Cell Separation methods, DNA, Cell Line, Tumor, Neoplastic Cells, Circulating pathology
- Abstract
Identification and characterization of circulating tumor cells (CTCs) from blood samples of patients with cancer can help monitor parameters such as disease stage, disease progression and therapeutic efficiency. However, the sensitivity and specificity of current multivalent approaches used for CTC capture is limited by the lack of control over the ligands' position. In this Protocol Update, we describe DNA-tetrahedral frameworks anchored with aptamers that can be configured with user-defined spatial arrangements and stoichiometries. The modified tetrahedral DNA frameworks, termed 'n-simplexes', can be used as probes to specifically target receptor-ligand interactions on the cell membrane. Here, we describe the synthesis and use of n-simplexes that target the epithelial cell adhesion molecule expressed on the surface of CTCs. The characterization of the n-simplexes includes measuring the binding affinity to the membrane receptors as a result of the spatial arrangement and stoichiometry of the aptamers. We further detail the capture of CTCs from patient blood samples. The procedure for the preparation and characterization of n-simplexes requires 11.5 h, CTC capture from clinical samples and data processing requires ~5 h per six samples and the downstream analysis of captured cells typically requires 5.5 h. The protocol is suitable for users with basic expertise in molecular biology and handling of clinical samples., (© 2024. Springer Nature Limited.)
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- 2024
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179. Response surface optimization of sludge dewatering process: synergistic enhancement by ultrasonic, chitosan and sludge-based biochar.
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Yang Y, Yang X, Chen Y, Li X, Yang Q, Li Y, Ma P, Zhang H, and Xu S
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- Ultrasonics, Charcoal, Filtration, Water, Waste Disposal, Fluid methods, Sewage, Chitosan
- Abstract
Due to the colloidal stability, the high compressibility and the high hydration of extracellular polymeric substances (EPS), it is difficult to efficiently dehydrate sludge. In order to enhance sludge dewatering, the process of ultrasonic (US) cracking, chitosan (CTS) re-flocculation and sludge-based biochar (SBB) skeleton adsorption of water-holding substances to regulate sludge dewaterability was proposed. Based on the response surface method, the prediction model of the specific resistance to filtration (SRF) and sludge cake moisture content (MC) was established. The US cracking time and the dosage of CTS and SBB were optimized. The results showed that the optimal parameters of the three were 5.08 s, 10.1 mg/g dry solids (DS) and 0.477 g/g DS, respectively. Meantime, the SRF and MC were 5.4125 × 10
11 m/kg and 76.8123%, which significantly improved the sludge dewaterability. According to the variance analysis, it is found that the fitting degree of SRF and MC model is good, which also confirms that there is significant interaction and synergy between US, CTS and SBB, and the contribution of CTS and SBB is greater. Moreover, the process significantly improves the sludge's calorific value and makes its combustion more durable., Competing Interests: The authors declare there is no conflict., (© 2024 The Authors This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY 4.0), which permits copying, adaptation and redistribution, provided the original work is properly cited (http://creativecommons.org/licenses/by/4.0/).)- Published
- 2024
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180. Machine Learning-Based Multiparametric Magnetic Resonance Imaging Radiomics Model for Preoperative Predicting the Deep Stromal Invasion in Patients with Early Cervical Cancer.
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Yan H, Huang G, Yang Z, Chen Y, and Xiang Z
- Abstract
Deep stromal invasion is an important pathological factor associated with the treatments and prognosis of cervical cancer patients. Accurate determination of deep stromal invasion before radical hysterectomy (RH) is of great value for early clinical treatment decision-making and improving the prognosis of these patients. Machine learning is gradually applied in the construction of clinical models to improve the accuracy of clinical diagnosis or prediction, but whether machine learning can improve the preoperative diagnosis accuracy of deep stromal invasion in patients with cervical cancer was still unclear. This cross-sectional study was to construct three preoperative diagnostic models for deep stromal invasion in patients with early cervical cancer based on clinical, radiomics, and clinical combined radiomics data using the machine learning method. We enrolled 229 patients with early cervical cancer receiving RH combined with pelvic lymph node dissection (PLND). The least absolute shrinkage and selection operator (LASSO) and the fivefold cross-validation were applied to screen out radiomics features. Univariate and multivariate logistic regression analyses were applied to identify clinical predictors. All subjects were divided into the training set (n = 160) and testing set (n = 69) at a ratio of 7:3. Three light gradient boosting machine (LightGBM) models were constructed in the training set and verified in the testing set. The radiomics features were statistically different between deep stromal invasion < 1/3 group and deep stromal invasion ≥ 1/3 group. In the training set, the area under the curve (AUC) of the prediction model based on radiomics features was 0.951 (95% confidence interval (CI) 0.922-0.980), the AUC of the prediction model based on clinical predictors was 0.769 (95% CI 0.703-0.835), and the AUC of the prediction model based on radiomics features and clinical predictors was 0.969 (95% CI 0.947-0.990). The AUC of the prediction model based on radiomics features and clinical predictors was 0.914 (95% CI 0.848-0.980) in the testing set. The prediction model for deep stromal invasion in patients with early cervical cancer based on clinical and radiomics data exhibited good predictive performance with an AUC of 0.969, which might help the clinicians early identify patients with high risk of deep stromal invasion and provide timely interventions., (© 2024. The Author(s).)
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- 2024
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181. MMP11 and MMP14 contribute to the interaction between castration-resistant prostate cancer and adipocytes.
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Tan B, Zheng X, Xie X, Chen Y, Li Y, and He W
- Abstract
Previous studies have demonstrated that adipocytes promote prostate cancer (PCa) cell progression, which facilitates the development of PCa into castration-resistant prostate cancer (CRPC); however, the underlying mechanisms are still not fully understood. Matrix metalloproteinases (MMPs) are a group of proteases responsible for the degradation of extracellular matrix (ECM) and the activation of latent factors. In our study, we detected that MMP11 expression was increased in PCa patients and that a high level of MMP11 was correlated with poor prognosis. Furthermore, siRNA knockdown of MMP11 in CRPC cells not only blocked the delipidation and dedifferentiation of mature adipocytes but also reduced the lipid uptake and utilization of CRPC cells in a cell co-culture model. The number of mitophagosomes and the expression level of Parkin were increased in MMP11-silenced CRPC cells. Moreover, we found that simultaneous downregulation of MMP14 and MMP11 expression may benefit patient survival. Indeed, MMP11/14 knockdown in CRPC cells significantly decreased lipid metabolism and cell invasion, at least partly through the mTOR/HIF1α/MMP2 signaling pathway. Importantly, MMP11/14 knockdown dramatically delayed tumor growth in a xenograft mouse model. Consistently, the decreased lipid metabolism, Ki67 and MMP2 expression, as well as the increased Parkin level were also confirmed in in vivo experiments, further demonstrating the mechanisms responsible for the tumor-promoting effects of MMP11/14. Collectively, our study elucidated the role of MMP11 and MMP14 in the bidirectional crosstalk between adipocytes and CRPC cells and provided the rationale of targeting MMP11/14 for the treatment of CRPC patients., Competing Interests: None., (AJCR Copyright © 2023.)
- Published
- 2023
182. GRP78 inhibitor HA15 increases the effect of Bortezomib on eradicating multiple myeloma cells through triggering endoplasmic reticulum stress.
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Chen Y, Tao Y, Hu K, and Lu J
- Abstract
Bortezomib (BTZ), a selective proteasome inhibitor, exhibits a significant efficacy in the therapy of multiple myeloma (MM) partly through triggering endoplasmic reticulum (ER) stress-dependent apoptosis. However, sensitivity to BTZ varies greatly among patients. ER stress functions as a double-edged sword in regulating cell survival depending on cell context and ER stress extent. The major aim of this study was to investigate whether GRP78 inhibitor, HA15, increased the therapeutic effect of BTZ on MM to through further increasing ER stress and shifting the balance towards cell apoptosis. The biological role of BTZ and HA15 was assessed using Cell counting kit- (CCK-) 8, colony formation, and Terminal deoxynucleotidyl transferase (TdT) dUTP nick-end labelling (TUNEL) assay. We found that BTZ combined with HA15 remarkably decreased MM cell viability more effective than BTZ monotherapy, though low dose of HA15 did not exhibit a significant cytotoxicity to MM cells. BTZ combined with HA15 also repressed colony formation ability of MM cell and accelerated MM cell apoptosis compared with BTZ monotherapy. Mechanistically, HA15 synergized with BTZ to trigger ER stress, as evidence by significantly increased expression of ER stress markers (GRP78, ATF4, CHOP, and XBP1). Importantly, unfolded protein response (UPR) inhibitor significantly damaged the effect of BTZ combined with HA15 on accelerating MM cell death. In vivo , combination treatment with BTZ and HA15 inhibited tumor growth more effective than BTZ alone, whereas these effects were blocked by UPR inhibitor. Taken together, these results demonstrate that ER stress is a critical pathway in regulating MM cell survival, and that combination treatment with BTZ and HA15 may be an effective strategy to treat MM patients that fail to respond to BTZ monotherapy., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2023 Published by Elsevier Ltd.)
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- 2023
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183. A CT-Based Radiomics Nomogram Combined with Clinic-Radiological Characteristics for Preoperative Prediction of the Novel IASLC Grading of Invasive Pulmonary Adenocarcinoma.
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Yang Z, Cai Y, Chen Y, Ai Z, Chen F, Wang H, Han Q, Feng Q, and Xiang Z
- Subjects
- Aged, Female, Humans, Male, Middle Aged, Neoplasm Grading, Nomograms, Tomography, X-Ray Computed, Preoperative Period, Adenocarcinoma of Lung diagnostic imaging, Adenocarcinoma of Lung pathology, Lung Neoplasms diagnostic imaging, Lung Neoplasms pathology
- Abstract
Rationale and Objectives: The novel International Association for the Study of Lung Cancer (IASLC) grading system of invasive lung adenocarcinoma (ADC) demonstrated a remarkable prognostic effect and enabled numerous patients to benefit from adjuvant chemotherapy. We sought to build a CT-based nomogram for preoperative prediction of the IASLC grading., Materials and Methods: This work retrospectively analyzed the CT images and clinical data of 303 patients with pathologically confirmed invasive ADC. The histological subtypes and radiological characteristics of the patients were re-evaluated. Radiomics features were extracted, and the optimal subset of features was established by ANOVA, spearman correlation analysis, and the least absolute shrinkage and selection operator (LASSO). Univariate and multivariate analyses identified the independent clinical and radiological variables. Finally, multivariate logistic regression analysis incorporated clinical, radiological, and optimal radiomics features into the nomogram. Receiver operating characteristic (ROC) curve, and accuracy were applied to assess the model's performance. Decision curve analysis (DCA), and calibration curve were applied to assess the clinical usefulness., Results: Nine selected CT image features were used to develop the radiomics model. The accuracy, precision, sensitivity, and specificity of the radiomics model outperformed the clinic-radiological model in the training and testing sets. Integrating Radscore with independent radiological characteristics showed higher prediction performance than clinic-radiological characteristics alone in the training (AUC, 0.915 vs. 0.882; DeLong, p < 0.05) and testing (AUC, 0.838 vs. 0.782; DeLong, p < 0.05) sets. Good calibration and decision curve analysis demonstrated the clinical usefulness of the nomogram., Conclusion: Radiomics features effectively predict high-grade ADC. The combined nomogram may facilitate selecting patients who benefit from adjuvant treatment., (Copyright © 2022 The Association of University Radiologists. Published by Elsevier Inc. All rights reserved.)
- Published
- 2023
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184. DNA-Guided Extracellular-Vesicle Metallization with High Catalytic Activity for Accurate Diagnosis of Pulmonary Nodules.
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Chen Y, Zhang S, Lu J, Li D, Wu H, Zhang L, Li X, Gao X, Xu Y, Zeng Z, Zeng L, Ding X, Li X, and Ding S
- Subjects
- Humans, Biomarkers metabolism, DNA metabolism, Membrane Proteins metabolism, Extracellular Vesicles metabolism
- Abstract
Sensitive and specific analysis of extracellular vesicles (EVs) offers a promising minimally invasive way to identify malignant pulmonary nodules from benign lesions. However, accurate analysis of EVs is subject to free target proteins in blood samples, which compromises the clinical diagnosis value of EVs. Here a DNA-guided extracellular-vesicle metallization (DEVM) strategy is described for ultrasensitive and specific analysis of EV protein biomarkers and classification of pulmonary nodules. The facile DEVM process mainly includes the incorporation of DNA labeled with cholesterol and thiol groups into EV membranes and subsequent deposition of Au
3+ and Pt4+ to allow the DNA-functionalized EVs to be encapsulated with AuPt nanoshells. It is found that the synthesized AuPt-metallized EVs possess extrinsic peroxidase-like activity. Utilizing the feature of the catalytic metal nanoshells just growth on the EV membranes, the DEVM method enables multiparametric recognition of target proteins and EV membranes and can produce an amplified colorimetric signal, avoiding the interference of free proteins. By profiling four surface proteins of EVs from 48 patients with pulmonary nodules, the highest area under the receiver operating characteristic curve (0.9983) is obtained. Therefore, this work provides a feasible EVs analysis tool for accurate pulmonary nodules management., (© 2023 Wiley-VCH GmbH.)- Published
- 2023
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185. The Burden of Attention-Deficit/Hyperactivity Disorder Traits in Adult Patients with Major Depressive Disorder in Japan.
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Kato M, Tsuda H, Chen Y, Tsuji T, and Nishigaki N
- Abstract
Purpose: Symptoms of attention-deficit/hyperactivity disorder (ADHD) often overlap with and are hidden by those of mood disorders, including major depressive disorder (MDD), resulting in adult ADHD patients being misdiagnosed as MDD. This study aims to examine if diagnosed MDD patients are more likely to exhibit ADHD traits and if the presence of ADHD traits increases the humanistic burden, including the impairment of health-related quality of life (HRQoL), work productivity and activity impairment (WPAI), and health-care resource utilization (HRU), on MDD patients in Japan., Methods: This study utilized existing National Health and Wellness Survey (NHWS) data. The 2016 Japan NHWS is an internet-based survey comprising a total of 39,000 respondents, including those with MDD and/or ADHD. A randomly selected subset of the respondents responded to the Japanese-version Adult ADHD self-report scale (ASRS-v1.1; ASRS-J) symptom checklist. Respondents were considered ASRS-J-positive if the total score was ≥36. The HRQoL, WPAI, and HRU were assessed., Results: Among MDD patients (n = 267), 19.9% were screened ASRS-J-positive, while 4.0% of non-MDD respondents (n = 8885) were ASRS-J-positive. There was a significant association between MDD status and ASRS-J status (crude odds-ratio [OR]: 5.9) as well as between MDD status and ADHD-diagnosis status (crude OR: 22.6). MDD patients who were ASRS-J positive experienced significantly lower HRQoL and higher WPAI than those who were ASRS-J negative. Limitations of this study include potential recall bias owing to the self-report nature of the survey and lack of objective confirmation of MDD diagnosis through review of medical records., Conclusion: This study demonstrated a significant association between MDD status and exhibiting ADHD traits. Adult MDD patients screened ASRS-J-positive experienced significantly higher humanistic burden than patients screened ASRS-J-negative. Our results emphasize the importance of ensuring appropriate screening of ADHD and looking out for potentially hidden ADHD symptoms when diagnosing and treating MDD in adulthood., Competing Interests: Masaki Kato has received grant funding from the Japanese Ministry of Health, Labor and Welfare, the Japan Society for the Promotion of Science, SENSHIN Medical Research Foundation, the Japan Research Foundation for Clinical Pharmacology and the Japanese Society of Clinical Neuropsychopharmacology and speaker’s honoraria from Sumitomo Pharma, Otsuka, Meiji-Seika Pharma, Eli Lilly, MSD K.K., Pfizer, Janssen Pharmaceutical, Shionogi, Mitsubishi Tanabe Pharma, Takeda Pharmaceutical, Lundbeck and Ono Pharmaceutical and participated in an advisory/review board for Otsuka, Sumitomo Pharma and Shionogi. Hiroshi Tsuda was a full-time employee of Takeda Pharmaceutical Company Limited, Tokyo, Japan and is affiliated with departments of Neurology in the faculty of Medicine of Juntendo and Toho universities and department of Clinical Research, Innovation and Education Center of Tohoku University. Yirong Chen was employed at Cerner Enviza, Singapore. Cerner Enviza received funding from Shionogi & Co. Ltd and Takeda Pharmaceutical Company Limited for conducting the analysis and manuscript development. Toshinaga Tsuji was a full-time employee of Shionogi & Co. Ltd, Osaka, Japan at the time the study was conducted. Toshinaga Tsuji is also a Stockholder of Shionogi & Co. Ltd and Takeda Pharmaceutical Company Limited. Nobuhiro Nishigaki is a full-time employee of Takeda Pharmaceutical Company Limited, Tokyo, Japan., (© 2023 Kato et al.)
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- 2023
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186. Target response controlled enzyme activity switch for multimodal biosensing detection.
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Zhang L, Wu H, Chen Y, Zhang S, Song M, Liu C, Li J, Cheng W, and Ding S
- Subjects
- Hemin chemistry, DNA, G-Quadruplexes, Biosensing Techniques methods, DNA, Catalytic chemistry, DNA, Catalytic genetics, DNA, Catalytic metabolism
- Abstract
How to achieve delicate regulation of enzyme activity and empower it with more roles is the peak in the field of enzyme catalysis research. Traditional proteases or novel nano-enzymes are unable to achieve stimulus-responsive activity modulation due to their own structural limitations. Here, we propose a novel Controllable Enzyme Activity Switch, CEAS, based on hemin aggregation regulation, to deeply explore its regulatory mechanism and develop multimodal biosensing applications. The core of CEAS relies on the dimerizable inactivation of catalytically active center hemin and utilizes a DNA template to orderly guide the G4-Hemin DNAzyme to tightly bind to DNA-Hemin, thereby shutting down the catalytic ability. By customizing the design of the guide template, different target stimulus responses lead to hemin dimerization dissociation and restore the synergistic catalysis of G4-Hemin and DNA-Hemin, thus achieving a target-regulated enzymatic activity switch. Moreover, the programmability of CEAS allowed it easy to couple with a variety of DNA recognition and amplification techniques, thus developing a series of visual protein detection systems and highly sensitive fluorescent detection systems with excellent bioanalytical performance. Therefore, the construction of CEAS is expected to break the limitation of conventional enzymes that cannot be targetable regulated, thus enabling customizable enzymatic reaction systems and providing a new paradigm for controllable enzyme activities., (© 2023. The Author(s).)
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- 2023
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187. Non-invasive brain stimulation for limb motor function and daily living activity improvement in acute stroke: A meta-analysis.
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Chen Y, Yang L, Li X, Tang L, Pi Y, and Bai D
- Subjects
- Humans, Activities of Daily Living, Systematic Reviews as Topic, Brain, Stroke Rehabilitation methods, Stroke diagnosis, Stroke therapy
- Abstract
Objective: To evaluate the effect of non-invasive brain stimulation (NIBS) in improving limb motor dysfunction and daily living activity during at the phase of acute stroke., Materials and Methods: Randomized controlled trials about the effect of NIBS on hemiparesis in acute stroke were retrieved from databases of China National Knowledge Infrastructure (CNKI), China Science and Technology Journal Database (VIP), Wanfang Data, CBM, PubMed, Embase, Cochrane Library, and Web of Science from inception until January 3rd 2022. The quality of the trials was assessed, and the data were extracted according to the Cochrane Handbook for Systematic Reviews of Interventions. A statistical analysis was carried out using Review Manager 5.3 and STATA 14. The effect size was evaluated by using the weighed mean difference (WMD) and a 95% confidence interval (CI). The stability and sensitivity of the results and sources of heterogeneity were also analyzed., Results: 12 studies involving 639 patients were included. Our meta-analysis showed that NIBS could improve the Fugl-Meyer Assessment (weighed mean difference = 3.96, 95% confidence interval = 3.45 to 4.48) and Barthel Index (weighed mean difference = 12.29, 95% confidence interval = 4.93 to 19.66), while reducing the National Institutes of Health Stroke Scale (weighed mean difference = -2.37, 95% confidence interval = -3.43 to -1.31)., Conclusion: NIBS is effective in improving paretic limb motor function and activities of daily living in patients during at the phase of acute stroke., Competing Interests: Declaration of Competing Interest There are no conflicts of interest declared by the authors., (Copyright © 2023 Elsevier Inc. All rights reserved.)
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- 2023
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188. Digital economy and pollution reduction-Mechanism and regional heterogeneity.
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Yang Z, Fu L, and Chen Y
- Subjects
- China, Cities, Economic Development, Environmental Pollution, Environmental Pollutants
- Abstract
The digital economy and ecological environment are two major issues related to high-quality economic development. Scholars have not yet reached a unified conclusion about the link between the digital economy and pollution emissions, and the impact mechanism of the former on the latter needs further study. Using data from 278 Chinese cities from 2010 to 2019, this research employs coupling coordination analysis, fixed effect analysis and mediation analysis to examine the heterogeneous impact mechanisms of the expansion of the digital economy on urban pollution reduction from many angles. It discovers that, first, the growth of the digital economy has decreased the discharge of urban pollutants overall. Second, the impact mechanisms of the digital economy are heterogeneous. From a regional perspective, industrial structure supererogation plays an intermediary role in the relationship between digital economy development and pollution reduction in the eastern and central regions, but the mediating effect is not significant in the western and northeastern regions. In terms of the city development level, industrial structure supererogation has significantly mediated the relationship between the growth of the digital economy and the reduction of pollution in first- and second-tier cities, but this mediating effect is not significant in third-tier and other cities. Third, the above conclusions are still valid after the robustness test is carried out using instrumental variable estimation, replacement of the estimation method, and replacement of explanatory variables. This study is a useful contribution to research on the effects of the digital economy and the factors influencing pollution reduction. The results advance the study of the digital economy and also have practical implications for improving China's ecological environment and fostering high-quality economic growth. Finally, we provide policy suggestions for the coordinated promotion of the digital economy's development, industrial structure supererogation and environmental pollution reduction., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2023 Yang et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2023
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189. Burden of schizophrenia among Japanese patients: a cross-sectional National Health and Wellness Survey.
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Baba K, Guo W, Chen Y, Nosaka T, and Kato T
- Subjects
- Absenteeism, Adult, Cost of Illness, Cross-Sectional Studies, Efficiency, Health Surveys, Humans, Japan epidemiology, Quality of Life, Schizophrenia epidemiology
- Abstract
Background: Schizophrenia places a great humanistic and financial burden to patients, families, and societies, and the burden is substantially impacted by comorbid conditions. This study aimed to estimate the lifetime prevalence of schizophrenia and to assess the health-related quality of life (HRQoL), work productivity, and indirect cost among schizophrenia patients with and without comorbidities (depressive symptoms, sleep disturbances, and anxiety problems)., Methods: This is a secondary analysis of existing data collected in 2019 from the Japan National Health and Wellness Survey. The schizophrenia patients were categorized based on their Patient Health Questionnaire-9 score, self-reported experience of sleep disturbances, and anxiety problems. The lifetime prevalence was estimated using the total number of diagnosed schizophrenia patients as the numerator and the total number of respondents as the denominator. The HRQoL was evaluated through the Short Form 12-Item (version 2) Health Survey and EuroQoL 5-dimensions scale. Work productivity and annual indirect costs were evaluated through the Work Productivity and Activity Impairment instrument and monthly wage rates. Multivariate analyses included the comparison of outcomes using generalized linear models., Results: The study was conducted with 178 schizophrenia patients with an average age of 42.7 years old and an estimated lifetime prevalence of 0.59% (95% CI: 0.51%, 0.68%). Patients who experienced sleep disturbances, more severe depressive symptoms, and anxiety problems had lower HRQoL, higher levels of absenteeism, presenteeism, total work productivity and activity impairment, and almost twice more indirect costs, compared to those without these conditions., Conclusion: Comorbid conditions among patients with schizophrenia impact significantly on their quality of life, work productivity as well as indirect costs., (© 2022. The Author(s).)
- Published
- 2022
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190. Saikosaponin-d alleviates hepatic fibrosis through regulating GPER1/autophagy signaling.
- Author
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Chen Y, Que R, Zhang N, Lin L, Zhou M, and Li Y
- Subjects
- Animals, Autophagy physiology, Carbon Tetrachloride pharmacology, Cells, Cultured, China, Fibrosis, Hepatic Stellate Cells drug effects, Hepatic Stellate Cells metabolism, Humans, Liver metabolism, Liver Cirrhosis pathology, Male, Mice, Mice, Inbred C57BL, Oleanolic Acid metabolism, Oleanolic Acid pharmacology, Saponins metabolism, Signal Transduction, Transforming Growth Factor beta metabolism, Liver Cirrhosis drug therapy, Oleanolic Acid analogs & derivatives, Receptors, Estrogen metabolism, Receptors, G-Protein-Coupled metabolism, Saponins pharmacology
- Abstract
Background: Hepatic fibrosis is the final pathway of chronic liver disease characterized by excessive accumulation of extracellular matrix (ECM), which eventually develop into cirrhosis and liver cancer. Emerging studies demonstrated that Saikosaponin-d (SSd) exhibits a protective role in liver fibrosis. However, the mechanism underlying anti-liver fibrosis of SSd in vivo and in vitro remains unclear., Methods and Results: Transforming growth factor (TGF)-β and carbon tetrachloride (CCl
4 ) were used for creating liver fibrosis model in vitro and in vivo, respectively. The role of SSd in regulating liver fibrosis was assessed through Sirius red and Masson staining, and IHC assay. We found that SSd attenuated remarkably CCl4 -induced liver fibrosis as evidenced by decreased collagen level, and decreased expression of fibrotic markers Col 1 and α-SMA. Meanwhile, SSd repressed autophagy activation as suggested by decreased BECN1 expression and increased p62 expression. Compared with HSCs from CCl4 -treated group, the primary HSCs from SSd-treated mice exhibited a marked inactivation of autophagy. Mechanistically, SSd treatment enhanced the expression of GPER1 in primary HSCs and in TGF-β-treated LX-2 cells. GPER1 agonist G1 repressed autophagy activation, whereas GPER1 antagonist G15 activated autophagy and G15 also damaged the function of SSd on suppressing autophagy, leading to subsequent increased levels of fibrotic marker level in LX-2 cells., Conclusions: Our findings highlight that SSd alleviates hepatic fibrosis by regulating GPER1/autophagy pathway., (© 2021. The Author(s).)- Published
- 2021
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191. Understanding Treatment Strategies and Preferences in Nonmetastatic Castration-Resistant Prostate Cancer From the Japanese Physician Perspective.
- Author
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Suzuki K, Grillo V, Chen Y, Singh S, and Ledesma DA
- Subjects
- Bayes Theorem, Humans, Japan, Male, Surveys and Questionnaires, Physicians, Prostatic Neoplasms, Castration-Resistant drug therapy
- Abstract
Purpose: Sixteen percent (16%) of patients with castration-resistant prostate cancer (CRPC) show no bone metastasis at diagnosis. However, 33% will become metastatic within 2 years. The goal of treatment in patients with nonmetastatic CRPC (nmCRPC), therefore, is to delay symptomatic metastases without undue toxicity. With novel antiandrogen treatments of different strengths and limitations available, physician preferences for nmCRPC treatment in Japan should be understood., Methods: A discrete choice experiment was conducted. Physicians chose between two hypothetical treatments in nmCRPC defined by six attributes: risk of fatigue, falls or fracture, cognitive impairment, hypertension, rashes as side effects of treatment, and extension of time until cancer-related pain occurs. Relative preference weights and relative importance were estimated by hierarchical Bayesian logistic regression. Physicians were also asked to make treatment decisions based on four hypothetical patient profiles to understand the most important factors driving decision making., Results: A total of 151 physicians completed the survey. Extension of time until cancer-related pain occurs was the most important attribute (relative importance, 32.3%; CI, 31.3% to 33.3%). Based on summed preference weights across all attributes, preferences for hypothetical treatment profiles I, II, and III were compared. A hypothetical treatment profile with better safety though shorter extension time was preferred (I: mean [standard deviation] = 1.7 [1.6 to 2.1]) over treatment profiles with lower safety but longer extension time (II: -2.7 [-2.8 to -2.6] and III: -0.2 [-0.3 to -0.1]). Treatment characteristics were more important factors for physicians' decision making than patient characteristics in prescribing treatment., Conclusion: Physicians preferred a treatment with better safety profile, and treatment characteristics were the most important factors for decision making. This might have implications in physicians' decision making for nmCRPC treatment in the future in Japan.
- Published
- 2021
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192. Molecular mechanisms of osteogenesis and antibacterial activity of Cu-bearing Ti alloy in a bone defect model with infection in vivo .
- Author
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Yang J, Qin H, Chai Y, Zhang P, Chen Y, Yang K, Qin M, Zhang Y, Xia H, Ren L, and Yu B
- Abstract
Objective: The antibacterial activity of copper (Cu)-alloy biomaterials has shown a great potential in clinical application. Here, we evaluated the osteogenesis and antibacterial effects of Ti6Al4V-6.5wt%Cu alloy in an in vivo model of infected bone defects and determine their responsible proteins and pathways using proteomics., Methods: After bone defects were filled with Ti6Al4V and Ti6Al4V-6.5wt%Cu implants for 6 week, the tissue and bone samples around the implants were harvested for radiographic, micro-CT, histological, and bone-related gene expression analyses. An iTRAQ-based protein identification/quantification approach was used to analyze the osteogenic and antibacterial effects of Ti6Al4V-6.5wt%Cu alloy., Results: Imaging and histological results showed Ti6Al4V alloy induced a stronger inflammatory response than Ti6Al4V-6.5wt%Cu alloy; imaging results and osteogenic protein levels showed Ti6Al4V-6.5wt%Cu alloy exerted a stronger osteogenic effect. In vitro experiment, we found the Ti6Al4V-6.5wt%Cu had significant antibacterial effects and inhibited the activity of Staphylococcus aureus in the early stage. In addition, the bacterial biofilm formed in Ti6Al4V-6.5wt%Cu group was significantly lower than that in Ti6Al4V group. Proteomic screening of 4279 proteins resulted in 35 differentially expressed proteins for further examination which were mainly associated with the cellular process, metabolic process, stimulus response, and cellular component organization. In further exploration of the mechanism of osteogenic mineralization of Ti6Al4V-6.5wt%Cu alloy, we found out SDC4 and AGRN were the top two target proteins associated with osteogenic differentiation and bone mineralization., Conclusion: Ti6Al4V-6.5wt%Cu alloy shows a great potential as a bone implant material due to its positive effects against bacterial infection and on bone formation., The Translational Potential of This Article: At present, titanium alloys and other non-antibacterial metal materials are used in orthopedic internal fixation operations. Our study demonstrates that Ti6Al4V-6.5wt%Cu alloy has good antibacterial and osteogenic effects in vivo and in vitro. This means that Ti6Al4V-6.5wt%Cu alloy may become a new kind of antimicrobial metallic material as internal fixation material to continuously exert its antimicrobial effects and reduce the infection rate after clinical internal fixation., Competing Interests: The authors have no conflicts of interest to disclose in relation to this article., (© 2020 The Author(s).)
- Published
- 2020
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193. The utility of LASSO-based models for real time forecasts of endemic infectious diseases: A cross country comparison.
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Chen Y, Chu CW, Chen MIC, and Cook AR
- Subjects
- Algorithms, Chickenpox epidemiology, Climate, Communicable Disease Control, Dengue epidemiology, Forecasting, Hand, Foot and Mouth Disease epidemiology, Humans, Incidence, Infectious Disease Medicine methods, Japan, Malaria epidemiology, Models, Statistical, Public Health, Reproducibility of Results, Singapore, Taiwan, Thailand, Wavelet Analysis, Communicable Diseases epidemiology, Disease Outbreaks, Machine Learning
- Abstract
Introduction: Accurate and timely prediction for endemic infectious diseases is vital for public health agencies to plan and carry out any control methods at an early stage of disease outbreaks. Climatic variables has been identified as important predictors in models for infectious disease forecasts. Various approaches have been proposed in the literature to produce accurate and timely predictions and potentially improve public health response., Methods: We assessed how the machine learning LASSO method may be useful in providing useful forecasts for different pathogens in countries with different climates. Separate LASSO models were constructed for different disease/country/forecast window with different model complexity by including different sets of predictors to assess the importance of different predictors under various conditions., Results: There was a more apparent cyclicity for both climatic variables and incidence in regions further away from the equator. For most diseases, predictions made beyond 4 weeks ahead were increasingly discrepant from the actual scenario. Prediction models were more accurate in capturing the outbreak but less sensitive to predict the outbreak size. In different situations, climatic variables have different levels of importance in prediction accuracy., Conclusions: For LASSO models used for prediction, including different sets of predictors has varying effect in different situations. Short term predictions generally perform better than longer term predictions, suggesting public health agencies may need the capacity to respond at short-notice to early warnings., (Copyright © 2018 Elsevier Inc. All rights reserved.)
- Published
- 2018
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194. Preparation of calcium phosphate cement and polymethyl methacrylate for biological composite bone cements.
- Author
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Yang J, Zhang K, Zhang S, Fan J, Guo X, Dong W, Wang S, Chen Y, and Yu B
- Subjects
- 3T3 Cells, Animals, Biomechanical Phenomena, Bone Cements toxicity, Calcium Phosphates toxicity, Compressive Strength, Humans, Materials Testing, Mice, Microscopy, Electron, Scanning, Osteoblasts drug effects, Polymethyl Methacrylate toxicity, Radiography, Rats, Rats, Sprague-Dawley, Tensile Strength, Tibial Fractures diagnostic imaging, Tibial Fractures pathology, Tibial Fractures therapy, Tissue Engineering, X-Ray Diffraction, Bone Cements chemistry, Calcium Phosphates chemistry, Polymethyl Methacrylate chemistry
- Abstract
Background: We studied the biological safety, biomechanics, and tissue compatibility of calcium phosphate cement and Polymethyl Methacrylate composite bone cement mixed in different ratios., Material/methods: CPC and PMMA were mixed in different ratios (3:1, 2:1, 1:1, 1:2, 1:5, 1:10, 1:15, and 1:20). PMMA solvent is a general solvent containing a dissolved preparation of the composite bone cement specific to a given specimen to determine biological safety, biomechanics, and tissue compatibility., Results: The CPC/PMMA (33%) group, CPC/PMMA (50%) group, CPC/PMMA (67%) group, and CPC/PMMA (75%) group were more in line with the composite bone cement without cytotoxicity requirements. The compressive strength of the CPC/PMMA (67%) group and CPC/PMMA (75%) group was 20 Mpa-30 Mpa, while that of the CPC/PMMA (4.8%) group, CPC/PMMA (6.25%) group, CPC/PMMA (9.1%) group, CPC/PMMA (16.7%) group, CPC/PMMA (33%) group, and CPC/PMMA (50%) group was 40 Mpa-70 Mpa. Curing time was longer in the CPC group (more than 11 min) and shorter in the PMMA group (less than 2 min). The results of weight loss rate showed that there were no significant differences between the CPC/PMMA group (4.8%, 6.25%, 9.1%, 16.7%, 33%) and PMMA control group (p>0.05). With the decrease of CPC content, the rate of weight loss gradually decreased., Conclusions: The CPC/PMMA (50%) group, CPC/PMMA (67%) group, and CPC/PMMA (75%) group provide greater variability and selectivity for the composite bone cement in obtaining better application.
- Published
- 2015
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195. Interaction network analysis of differentially expressed genes and screening of cancer marker in the urine of patients with invasive bladder cancer.
- Author
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Guo B, Che T, Shi B, Guo L, Zhang Z, Li L, Cai C, and Chen Y
- Abstract
Objective: To detect the expression profile of bladder cancer and to delineate the interaction network of these genes in invasive bladder cancer., Methods: A total of 126 differentially expressed genes were identified, and input into STRING online database to delineate interaction network. The network data were screened with central nodes. The expression of genes with the most evident change in the exfoliated cells of urine was detected. RNA markers with over-expression in stage Ta tumor and/or T1 to T4 tumors but low expression in blood or inflammatory cells were characterized., Results: On the basis of assay of 21,639 whole-genome oligonucleotide microarray, a total of 126 differentially expressed genes were identified, of which 69 had up-regulated expression and 57 had down-regulated expression. STRING screening showed there were interactions among 103 genes in the bladder cancer which formed a complex network. A total of 23 central nodes were screened with Cytoscape and are involved in multiple signaling pathways related to tumorigenesis. The test specificity was 80% for the 30 control patients with urinary tract infections. The combination of BLCA-4 and HOXA13 could distinguish between low and high grade tumors, with specificity and sensitivity of 80%., Conclusion: The interaction network of differentially expressed genes, especially the central nodes of this network, can provide evidence for the early diagnosis and molecular targeted therapy of invasive bladder cancer, and combined detection of IGF-1, hTERT, BLCA-4 and HOXA13 genes is helpful to evaluate BTCC at different stages.
- Published
- 2015
196. [Design of a multifunctional and transparent urinary system model].
- Author
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Hu W, Huang C, Feng J, Zhang Y, Wang J, Xu X, Song Y, Sun Z, and Chen Y
- Subjects
- Female, Humans, Kidney, Male, Prostate, Ureter, Urethra, Urinary Bladder, Models, Anatomic, Models, Biological, Urogenital System anatomy & histology
- Abstract
This article describes a novel Multifunctional and Transparent Urinary System Model (MTUSM), which can be applied to anatomy teaching, operational training of clinical skills as well as simulated experiments in vitro. This model covers kidneys, ureters, bladder, prostate, male and female urethra, bracket and pedestal, etc. Based on human anatomy structure and parameters, MTUSM consists of two transparent layers i. e. transparent organic glass external layer, which constraints the internal layer and maintains shape of the model, and transparent silica gel internal layer, which possesses perfect elasticity and deformability. It is obvious that this model is preferable in simulating the structure of human urinary system by applying hierarchical fabrication. Meanwhile, the transparent design, which makes the inner structure, internal operations and experiments visual, facilitates teaching instruction and understanding. With the advantages of simple making, high-findelity, unique structure and multiple functions, this model will have a broad application prospect and great practical value.
- Published
- 2014
197. Small double-stranded RNA mediates the anti-cancer effects of p21WAF1/ClP1 transcriptional activation in a human glioma cell line.
- Author
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Dong Z, Dang Y, and Chen Y
- Subjects
- Apoptosis genetics, Cell Line, Tumor, Cell Proliferation drug effects, Central Nervous System Neoplasms pathology, Cyclin-Dependent Kinase Inhibitor p21 metabolism, G1 Phase genetics, Gene Expression Regulation, Neoplastic, Glioma pathology, Humans, Inhibitor of Apoptosis Proteins genetics, Promoter Regions, Genetic, Survivin, Transcriptional Activation, Transfection, Up-Regulation, Central Nervous System Neoplasms genetics, Cyclin-Dependent Kinase Inhibitor p21 genetics, Glioma genetics, RNA, Double-Stranded genetics
- Abstract
Purpose: This study was conducted to investigate the small double-stranded RNA (dsRNA) mediated anti-tumor effects of p21WAF1/ClP1 (p21) transcriptional activation in vitro in the human glioma SHG-44 cell line., Materials and Methods: Human glioma SHG-44 cells were transfected with dsRNA using LipofectAMINE 2000 transfection reagent. Real-time PCR and Western blot analysis were conducted to detect p21 and survivin mRNA and protein levels, respectively. Cell proliferation was examined by MTT assay. Cell cycle distribution and apoptosis were detected by flow-cytometric analysis., Results: We found that dsRNA targeting p21 promoter (dsP21) significantly induced the expression of p21 at transcription and protein levels, and reduced the expression of survivin. AS well, dsP21 transcription significantly inhibited human glioma SHG-44 cell proliferation. Analysis of cell cycle distribution revealed that dsP21 transfection increased accumulation of cells in the G0/G1 phase and reduced accumulation of cells in the S phase. Further analysis revealed that dsP21 transcription led to an increase in both early and late stages of apoptosis in human glioma SHG-44 cells., Conclusion: In the present study, P21 activation by RNA-induced gene activation (RNAa) induced anti-tumor activity in vitro in a human glioma SHG-44 cell line. The results suggested that RNAa could be used for human glioma treatment by targeted activation of tumor suppressor genes.
- Published
- 2014
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198. Clinical characteristics of refractory melamine-related renal calculi.
- Author
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Li Y, Chen Y, Huang G, Ru X, Li W, Zhang W, and Huang X
- Subjects
- Child, Preschool, Female, Humans, Infant, Kidney Calculi chemistry, Kidney Calculi therapy, Male, Treatment Failure, Kidney Calculi diagnosis, Triazines analysis
- Abstract
Objective: The melamine urinary stones are uric acid-based and amenable to alkalization and extracorporeal shock-wave lithotripsy (ESWL). However, a significant percentage of stones failed in alkalization and ESWL. To predict it before a likely deemed failed treatment, we attempt to confirm their clinical characteristics., Methods: A total of 6 refractory- and 9 sensitive-melamine-related renal calculi were included from 15 children (age 6-51 months, mean 14). Renal function, and blood calcium and uric acid level were measured before treatment. Stone composition was determined qualitatively using Fourier transform infrared. Stone computed tomography (CT)-attenuation value, stone melamine and cyanuric acid level, and stone calcium level were performed quantitatively using spiral CT, high-performance liquid chromatography, and flame atomic absorption spectrum, respectively., Results: Blood biochemical parameters in all children within the normal reference range and no difference was observed between refractory melamine stones and sensitive melamine stones (P >.05). Compared with sensitive melamine stones, stone calcium level and stone CT-attenuation value in refractory melamine stones were significantly higher (21.58 ± 5.76% vs 1.37 ± 1.47%, P = .000; 1037 ± 341HU vs 156 ± 61HU, P = 0.000). Multivariate regression analysis indicated stone calcium level had more impact on alkalization failure than other factors (P(children's age) = .670, P(feedingtime) = .826, P(stonesize) = .376, and P(stonecalcium level) = .000, and P(regressionmodel) = .000)., Conclusion: Higher stone calcium level is the essential change of refractory melamine stones. The stones from children older than 2 years or stones with in vivo CT-attenuation value >700 Hounsfield units in clinical setting should be strong suspected for alkalization- and ESWL-resistance because they most likely contain >10.88% calcium level., (Copyright © 2011 Elsevier Inc. All rights reserved.)
- Published
- 2011
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199. [The synergistic effects of paclitaxel and gemcitabine on prostate cancer cell line PC-3].
- Author
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Sun M, Yang Y, Li H, Chen Y, Wang Z, Lu Y, Wei Q, and Yue Z
- Subjects
- Cell Line, Tumor, Deoxycytidine pharmacology, Dose-Response Relationship, Drug, Down-Regulation, Drug Synergism, Flow Cytometry, Humans, Male, Gemcitabine, Antimetabolites, Antineoplastic pharmacology, Antineoplastic Agents, Phytogenic pharmacology, Apoptosis drug effects, Deoxycytidine analogs & derivatives, Paclitaxel pharmacology, Prostatic Neoplasms pathology
- Abstract
Objective: To observe the synergistic effects of paclitaxel and gemcitabine on prostate cancer cell line PC-3 in vitro., Methods: Cell morphology, MTU, flow cytometer and immunocytochemical method were used to observe the effects of 10(-6), 10(-7), 10(-8) mol/L paclitaxel and 10(-7), 10(-8), 10(-9) mol/L gemcitabine on prostate cancer cell line PC-3 by single or synergistic administration for 48 hours in vitro., Results: Gemcitabine above 10(-8) mol/L enhanced the growth suppression [suppression ratio > or = (50.8 +/- 4.2)%, P < 0.05] and apoptosis [apoptosis ratio > or = (22.9 +/- 2.3)%, P < 0.05] and down-regulation of the expression of cyclin D1 [expression ratio < or = (9.6 +/- 1.6)%, P < 0.01] induced by paclitaxel above 10(-7) mol/L in PC-3 cells. Gemcitabine changed the ratio of G2/M cell arrest induced by paclitaxel from (70.3 +/- 9.7)% to (38.2 +/- 4.2)%, and reversed the G2/M arrest partially (P < 0.01)., Conclusion: Paclitaxel and gemcitabine can enhance the growth suppression and apoptosis induced by paclitaxel in a synergistic way. They show great potential in the treatment of androgen-independent carcinoma of the prostate.
- Published
- 2004
200. [Apoptosis and hemodynamic changes of the penile tissue in diabetic rats].
- Author
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Liu J, Xia R, Fu W, Chen Y, and Liu G
- Subjects
- Animals, Arteries pathology, Diabetes Mellitus, Experimental complications, Diabetes Mellitus, Experimental physiopathology, Erectile Dysfunction etiology, Flow Cytometry, In Situ Nick-End Labeling, Male, Penis blood supply, Rats, Rats, Wistar, Streptozocin, Apoptosis, Diabetes Mellitus, Experimental pathology
- Abstract
Objective: To compare the apoptosis and hemodynamic changes of the penile tissue in diabetic and healthy rats., Methods: Sixteen chronic diabetic and 10 matched normal control rats were injected with a single dose of streptozotocin (STZ) 65 mg/kg and the diabetic model established. Eight weeks later the rats were killed, their haemoglobin Alc( HbAlc) measured, and their penises harvested. TUNEL assay (in situ nick end-labeling) and flow cytometry were used to analyse the penile cells for apoptosis. The thickness and diameter of the arteries were measured., Results: TUNEL showed apoptosis in the chronic diabetic rats. Flow cytometric analysis showed the apoptotic peak in the penile cells of the chronic diabetic rats when compared with the controls (P < 0.05). There was significant difference between the diabetic and healthy rats. Morphological analysis revealed that the thickness of the artery wall increased while the artery diameter decreased in the diabetes group compared with the controls., Conclusion: Diabetes can lead to increasing apoptosis of the penile tissue, cause a decrease in the penile artery diameter and the thickening of the penile artery wall.
- Published
- 2004
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