41 results on '"Shihao Guo"'
Search Results
2. Study on Mechanical Property of Coal-Rock Combination Under Different Unloading Confining Pressure Rate
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Shanchao Hu, Xuedong Zhou, Wenkai Ru, Jinming Han, Shihao Guo, Chenxi Zhang, and Lei Yang
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Architecture ,Soil Science ,Geology ,Geotechnical Engineering and Engineering Geology - Published
- 2023
3. CBS-H2S axis preserves the intestinal barrier function by inhibiting COX-2 through sulfhydrating human antigen R in colitis
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Shihao Guo, Zhihao Huang, Jing Zhu, Taohua Yue, Xin Wang, Yisheng Pan, Dingfang Bu, Yucun Liu, Pengyuan Wang, and Shanwen Chen
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Multidisciplinary - Published
- 2023
4. Absorption-Dominant, Low-Reflection Multifunctional Electromagnetic Shielding Material Derived from Hydrolysate of Waste Leather Scraps
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Dangge Gao, Shihao Guo, Yingying Zhou, Bin Lyu, Xinjing Li, Ping Zhao, and Jianzhong Ma
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General Materials Science - Abstract
High-performance flexible conductive films are highly promising for the development of wearable devices, artificial intelligence, medical care, etc. Herein, a three-step procedure was developed to produce electromagnetic interference (EMI) shielding, Joule heating, and a hydrophobic nanofiber film based on hydrolysate of waste leather scraps (HWLS): (i) electrospinning preparation of the HWLS/polyacrylonitrile (PAN)/zeolitic imidazolate framework-67 (ZIF-67) nanofiber film, (ii) carbonization of the HWLS/PAN/ZIF-67 nanofiber film, and (iii) coating of the carbon nanofiber@cobalt (Co@CNF) nanofiber film with perfluorooctyltriethoxysilane (POTS). The X-ray diffraction results showed that metal nanoparticles and amorphous carbon had obvious peaks. The micromorphology results showed that metal nanoparticles were coated with carbon nanofibers. The conductivity and shielding efficiency of the carbon nanofiber film with 250 μm thickness could reach 45 S/m and 49 dB, respectively, and absorption values (
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- 2022
5. The Effect of 1T Phase Molybdenum Disulfide on the Tribological Performance of Polyethylene Glycol
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Ning Li, Shihao Guo, Bingli Pan, Mengxin Xie, Junjiang Yan, and Zhe Chen
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Polymers and Plastics ,Materials Chemistry ,General Chemistry ,Condensed Matter Physics - Published
- 2022
6. Close-loop recyclable and flexible halide perovskite@wool keratin sensor with piezoelectric property
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Yingying Zhou, Dangge Gao, Bin Lyu, Chi Zheng, Litao Tang, Shihao Guo, and Jianzhong Ma
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Fuel Technology ,Electrochemistry ,Energy Engineering and Power Technology ,Energy (miscellaneous) - Published
- 2023
7. Effects of the Excavation of a Hydraulic Tunnel on Groundwater at the Wuyue Pumped Storage Power Station
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Tong Jiang, Xun Pei, Wenxue Wang, Longfei Li, and Shihao Guo
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Fluid Flow and Transfer Processes ,pumped storage ,Wuyue Reservoir ,transient numerical simulation ,parameter inversion ,seepage field ,Process Chemistry and Technology ,General Engineering ,General Materials Science ,Instrumentation ,Computer Science Applications - Abstract
The tailwater tunnel of the Wuyue pumped storage power station is located in bedrock and extends to depths between tens and hundreds of meters. It is impossible to analyze and evaluate the whole engineering area from geological exploration data, and the hydrogeological conditions are complicated. In the early stages of the tailwater tunnel’s construction, the drinking water wells in four villages dried up. This paper reports the results from a field investigation, in situ tests, laboratory tests, and numerical simulation carried out to determine how the groundwater was affected when the tunnel was excavated. A hydrogeological model of the region was established from the inverted regional natural flow field parameters. The model was validated, and an analysis of the errors showed that there was an average error of 1.98% between the natural flow field and the hydrogeological survey flow field. The model was then used to simulate the three-dimensional transient seepage fields under normal seepage conditions and limited seepage conditions, as far as was practical. The results showed that, as the excavation of the tailwater tunnel advanced, the water inflow to the tunnel also increased. When the water inflow increased from 1000 to 5000 m3/d, the water level at a distance of 100 m from the axis of the tunnel dropped from −0.956 to −1.604 m. We then analyzed how the water level changed as the water inflow varied and proposed a formula for calculating the extent of the influence on the groundwater. We studied how the water level changed at different well points to ascertain how a groundwater well became depleted and determined the factors that influenced seepage in the regional flow field. The water level in different areas of the project area was simulated and analyzed, and the extent of the groundwater area affected by the tunnel construction was clarified. We then studied how the groundwater in different areas of, and distances from, the project area was influenced by normal seepage conditions and limited seepage conditions and proposed a formula for calculating the extent of the influence on groundwater for different water inflows. We constructed a ‘smart site’ for visualizing data, sharing information, and managing the project. Time–frequency domain analysis was applied to explore the extent of the impacts and range of the vibration effects on residential housing at different distances from the project area caused by the different methods for excavating the tailwater tunnel. The results from this analysis will provide useful insights into how the excavation of this tailwater tunnel will impact the local residents and living areas.
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- 2023
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8. 2D graphene/FeOCl heterojunctions with enhanced tribology performance as a lubricant additive for liquid paraffin
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Mengxin Xie, Bingli Pan, Ning Li, Shuang Zhao, Junjiang Yan, Shihao Guo, Zhe Chen, and Honggang Wang
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General Chemical Engineering ,General Chemistry - Abstract
Graphene/FeOCl (G/FeOCl) heterojunctions were prepared by microwave-pyrolysis, thoroughly characterised and used to probe the synergistic lubrication of G with FeOCl in liquid paraffin. We provide a pathway for low-friction lubricants by deploying G/FeOCl 2D materials.
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- 2022
9. SPARC enhances 5-FU chemosensitivity in gastric cancer by modulating epithelial-mesenchymal transition and apoptosis
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Guowei Chen, Pengyuan Wang, Junling Zhang, Ju Ma, Yongchen Ma, Jing Zhu, Shihao Guo, Shanwen Chen, Taohua Yue, Yucun Liu, and Jianwen Hu
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0301 basic medicine ,Epithelial-Mesenchymal Transition ,Cell ,Biophysics ,Mice, Nude ,Antineoplastic Agents ,Apoptosis ,Biochemistry ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Stomach Neoplasms ,Cell Line, Tumor ,medicine ,Animals ,Humans ,Osteonectin ,Viability assay ,Epithelial–mesenchymal transition ,RNA, Small Interfering ,Molecular Biology ,Mice, Inbred BALB C ,Caspase 3 ,Chemistry ,Cell growth ,Cell migration ,Cell Biology ,Transfection ,Xenograft Model Antitumor Assays ,Actins ,Up-Regulation ,030104 developmental biology ,medicine.anatomical_structure ,Drug Resistance, Neoplasm ,Gene Knockdown Techniques ,030220 oncology & carcinogenesis ,Cancer cell ,Cancer research ,Female ,Fluorouracil ,Poly(ADP-ribose) Polymerases - Abstract
Previous studies have shown that secreted protein acidic and rich in cysteine (SPARC) proteins can inhibit the development of cancer cells in various ways, such as by inhibiting angiogenesis and inhibiting cell proliferation. In fact, SPARC proteins may have an effect on the chemoresistance of gastric cancer cells to 5-Fluorouracil (5-FU), which needs further research in the future. Therefore, the purpose of this study was to explore the relationship between SPARC proteins and the chemosensitivity of gastric cancer cells to 5-FU. In vitro, after SPARC protein levels were regulated by plasmid, siRNA and human recombinant SPARC protein transfection in MGC-803, SGC-7901 and BGC-823 cells, we detected epithelial-mesenchymal transition (EMT), apoptosis markers and cell viability after 5-FU treatment. In vivo, we implanted BGC-823 cells with stable SPARC overexpression into nude mice. Tumour size was measured to assess the effect of SPARC protein on tumour formation and 5-FU chemosensitivity. In SGC-7901 and BGC-823 cells, both endogenous and exogenous upregulation of SPARC protein levels decreased cell viability, destroyed cytoskeletal F-actin, inhibited cell migration, and downregulated a series of transcription factors to inhibit cell EMT; it also upregulated cell apoptosis-related proteins to promote cell apoptosis. However, we obtained opposite results in SPARC knockdown MGC-803 cells. In vivo, compared with the control group, the group engrafted with BGC-823 cells stably overexpressing SPARC had a significant smaller tumour size. After 5-FU treatment, the new tumour gradually decreased in size. Our results show that the SPARC protein could enhance 5-FU chemosensitivity in gastric cancer cell lines by inhibiting EMT and promoting cell apoptosis.
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- 2021
10. Endogenous hydrogen sulfide regulates xCT stability through persulfidation of OTUB1 at cysteine 91 in colon cancer cells
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Dingfang Bu, Pengyuan Wang, Yisheng Pan, Xin Wang, Jing Zhu, Taohua Yue, Shanwen Chen, Yucun Liu, and Shihao Guo
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0301 basic medicine ,Cancer Research ,Synthetic lethality ,Amino Acid Transport System y+ ,Gene Expression ,Transsulfuration pathway ,Models, Biological ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Ubiquitin ,In vivo ,Cell Line, Tumor ,Animals ,Humans ,Ferroptosis ,Cysteine ,RC254-282 ,Original Research ,Deubiquitinating Enzymes ,biology ,Hydrogen sulfide ,Protein Stability ,Chemistry ,xCT ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Immunohistochemistry ,In vitro ,Cell biology ,Gene Expression Regulation, Neoplastic ,Disease Models, Animal ,030104 developmental biology ,Tissue Array Analysis ,OTUB1 ,Apoptosis ,030220 oncology & carcinogenesis ,Colonic Neoplasms ,biology.protein ,Fluorouracil ,Synthetic Lethal Mutations ,Protein Processing, Post-Translational ,Protein Binding - Abstract
Increased xCT and transsulfuration pathway has been associated with metabolic reprogramming of colorectal cancer. However, the correlation between these 2 events and the underlying molecular mechanism remains obscure. xCT expression was determined in tissue microarrays of colorectal cancer. RNA sequencing and functional assays in vitro was adopted to delineate the involvement of transsulfuration pathway in the proper function of xCT in maintaining the chemoresistant phenotype. The synthetic lethality of blocking xCT and the transsulfuration pathway was investigated both in vitro and in vivo. The up-regulation of the transsulfuration pathway after inhibiting xCT in colon cancer cells was evident and exogenous H2S partially reversed the loss of chemoresistance phenotype after inhibiting xCT. Mechanistically, CTH derived H2S increased the stability of xCT through persulfidation of OTU domain-containing ubiquitin aldehyde-binding protein 1 at cysteine 91. AOAA and Erastin resulted in synthetic lethality both in vitro and in vivo, which was mediated through increased ferroptosis and apoptosis. Our findings suggest that a reciprocal regulation exists between xCT and the transsulfuration pathway, which is a targetable metabolic vulnerability. Mechanistically, CTH derived H2S increased the stability of xCT through persulfidation of OTU domain-containing ubiquitin aldehyde-binding protein 1 at cysteine 91.
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- 2021
11. The aging-related risk signature in colorectal cancer
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Jing Zhu, Shuai Zuo, Pengyuan Wang, Yucun Liu, Shihao Guo, Zhihao Huang, Shanwen Chen, and Taohua Yue
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Male ,Oncology ,Senescence ,Aging ,medicine.medical_specialty ,Colon ,Colorectal cancer ,colorectal cancer ,risk signature ,Risk Factors ,Internal medicine ,Tumor Microenvironment ,medicine ,Humans ,Genetic Predisposition to Disease ,Protein Interaction Maps ,Intestinal Mucosa ,Survival analysis ,Aged ,Tumor microenvironment ,Framingham Risk Score ,Proportional hazards model ,business.industry ,Gene sets ,Cancer ,Cell Biology ,TCGA ,Prognosis ,GEO ,medicine.disease ,Survival Analysis ,Female ,Colorectal Neoplasms ,business ,Genes, Neoplasm ,Research Paper - Abstract
Background Colorectal cancer (CRC) is the third most common cancer worldwide. The opening of the TCGA and GEO databases has promoted the progress of CRC prognostic assessment, while the aging-related risk signature has never been mentioned. Methods R software packages, GSEA software, Venn diagram, Metascape, STRING, Cytoscape, cBioPortal, TIMER and GeneMANIA website were used in this study. Results Aging-related gene sets, GO_AGING, GO_CELL_AGING and GO_CELLULAR_SENESCENCE, were activated significantly in CRC tissues. We constructed an aging-related risk signature using LASSO COX regression in training group TCGA and validated in testing group GSE39582. The risk score was significantly associated with the overall survival of CRC patients, whose stability was clarified by stratified survival analysis and accuracy was demonstrated using the ROC curve. The risk score was significantly increased in the advanced stage, T3-4, N1-3 and M1 and positively correlated with the richness of immune cell infiltration in the tumor microenvironment. We further investigated the molecular characteristics of 15 hub genes at the DNA and protein levels and performed GSEA between high- and low-risk groups. Conclusions The aging-related signature is a reliable prognostic analysis model and can predict the severity and immune cell infiltration of CRC patients.
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- 2021
12. Identification of Key Genes Affecting Flavor Formation in Beijing-You Chicken Meat by Transcriptome and Metabolome Analyses
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Kai Gai, Yu Ge, Dapeng Liu, He Zhang, Bailin Cong, Shihao Guo, Yizheng Liu, Kai Xing, Xiaolong Qi, Xiangguo Wang, Longfei Xiao, Cheng Long, Yong Guo, and Xihui Sheng
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meat flavor ,Health (social science) ,metabolome ,Plant Science ,Beijing-You chicken ,transcriptome ,Health Professions (miscellaneous) ,Microbiology ,regulatory network ,Food Science - Abstract
The flavor of chicken meat is influenced by muscle metabolites and regulatory genes and varies with age. In this study, the metabolomic and transcriptomic data of breast muscle at four developmental stages (days 1, 56, 98, and 120) of Beijing-You chickens (BJYs) were integrated and 310 significantly changed metabolites (SCMs) and 7,225 differentially expressed genes (DEGs) were identified. A Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis showed that SCMs and DEGs were enriched in amino acid, lipid, and inosine monophosphate (IMP) metabolism pathways. Furthermore, genes highly associated with flavor amino acids, lipids, and IMP were identified by a weighted gene co-expression network analysis (WGCNA), including cystathionine β-synthase (CBS), glycine amidinotransferase (GATM), glutamate decarboxylase 2 (GAD2), patatin-like phospholipasedomain containing 6 (PNPLA6), low-specificity L-threonine aldolase (ItaE), and adenylate monophosphate deaminase 1 (AMPD1) genes. A regulatory network related to the accumulation of key flavor components was constructed. In conclusion, this study provides new perspectives regarding the regulatory mechanisms of flavor metabolites in chicken meat during development.
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- 2023
13. Identification of 6 Hub Proteins and Protein Risk Signature of Colorectal Cancer
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Taohua Yue, Hao Xu, Shihao Guo, Jing Zhu, Yuyang Zhang, Zhihao Huang, Shanwen Chen, Yucun Liu, Pengyuan Wang, and Cheng Liu
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Male ,0301 basic medicine ,Oncology ,Receptor, ErbB-2 ,Colorectal cancer ,Kaplan-Meier Estimate ,Tyrosine-kinase inhibitor ,0302 clinical medicine ,Risk Factors ,Data Mining ,Medicine ,Gene Regulatory Networks ,Protein Interaction Maps ,Databases, Protein ,beta Catenin ,Framingham Risk Score ,General Medicine ,Middle Aged ,Prognosis ,ErbB Receptors ,Gene Expression Regulation, Neoplastic ,Treatment Outcome ,030220 oncology & carcinogenesis ,Regression Analysis ,Female ,Colorectal Neoplasms ,Research Article ,medicine.medical_specialty ,Article Subject ,medicine.drug_class ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,Text mining ,Internal medicine ,Biomarkers, Tumor ,Humans ,Correlation test ,Aged ,Proportional Hazards Models ,General Immunology and Microbiology ,business.industry ,Proportional hazards model ,Gene Expression Profiling ,Cancer ,medicine.disease ,Protein expression profile ,030104 developmental biology ,Transcriptome ,business - Abstract
Background. Colorectal cancer (CRC) is the second most common cause of cancer death in the United States and the third most common cancer globally. The incidence of CRC tends to be younger, and we urgently need a reliable prognostic assessment strategy. Methods. Protein expression profile and clinical information of 390 CRC patients/samples were downloaded from the TCPA and TCGA database, respectively. The Kaplan-Meier, Cox regression, and Pearson correlation analysis were applied in this study. Results. Based on the TCPA and TCGA database, we screened 6 hub proteins and first constructed protein risk signature, all of which were significantly associated with CRC patients’ overall survival (OS). The risk score was an independent prognostic factor and significantly related with the size of the tumor in situ (T). 6 hub proteins were differentially expressed in cancer and normal tissues and in different CRC stages, which were validated at the ONCOMINE database. Next, 40 coexpressed proteins of 6 hub proteins were extracted from the TCPA database. In the protein-protein interaction (PPI) network, HER1, HER2, and CTNNB1 were at the center. Function enrichment analysis illustrated that 46 proteins were mainly involved in the EGFR (HER1) tyrosine kinase inhibitor resistance pathway. Conclusion. Studies indicated that 6 hub proteins might be considered as new targets for CRC therapies, and the protein risk signature can be used to predict the OS of CRC patients.
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- 2020
14. Overexpression of CBS/H2S inhibits proliferation and metastasis of colon cancer cells through downregulation of CD44
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Yuyang Zhang, Shanwen Chen, Jing Zhu, Shihao Guo, Taohua Yue, Hao Xu, Jianwen Hu, Zhihao Huang, Zeyang Chen, Pengyuan Wang, and Yucun Liu
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Cancer Research ,Oncology ,Genetics - Abstract
Background The role of hydrogen sulfide (H2S) in cancer biology is controversial, including colorectal cancer. The bell-shaped effect of H2S refers to pro-cancer action at lower doses and anti-cancer effect at higher concentrations. We hypothesized that overexpression of cystathionine-beta-synthase (CBS)/H2S exerts an inhibitory effect on colon cancer cell proliferation and metastasis. Methods Cell proliferation was assessed by Cell Counting Kit-8 (CCK-8), clone-formation and sphere formation assay. Cell migration was evaluated by transwell migration assay. Intracellular H2S was detected by H2S probe. Chromatin immunoprecipitation (ChIP) analysis was carried out to examine DNA–protein interaction. Cell experiments also included western blotting, flow cytometry, immunohistochemistry (IHC) and immunofluorescence analysis. We further conducted in vivo experiments to confirm our conclusions. Results Overexpression of CBS and exogenous H2S inhibited colon cancer cell proliferation and migration in vitro. In addition, overexpression of CBS attenuated tumor growth and liver metastasis in vivo. Furthermore, CD44 and the transcription factor SP-1 was probably involved in the inhibitory effect of CBS/H2S axis on colon cancer cells. Conclusions Overexpression of CBS and exogenous provision of H2S inhibited colon cancer cell proliferation and migration both in vivo and in vitro. Molecular mechanisms might involve the participation of CD44 and the transcription factor SP-1.
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- 2022
15. Macrophage-derived SPARC Attenuates M2-mediated Pro-tumour Phenotypes
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Xin Wang, Ju Ma, Xiaoqian Zhang, Yucun Liu, Shihao Guo, Guowei Chen, Yanpeng Yang, Yongchen Ma, Taohua Yue, Pengyuan Wang, Yingze Ning, Jing Zhu, Shanwen Chen, Zhihao Huang, and Jianwen Hu
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0301 basic medicine ,tumour-associated macrophages ,gastric cancer ,proliferation ,Regulator ,apoptosis ,Cancer ,SPARC ,Biology ,medicine.disease ,migration ,Phenotype ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,Oncology ,Apoptosis ,030220 oncology & carcinogenesis ,medicine ,Cancer research ,Macrophage ,Protein kinase B ,PI3K/AKT/mTOR pathway ,Cysteine ,Research Paper - Abstract
Since the theory of seed and soil was put forward, people have increasingly recognized that the tumour microenvironment is an important regulator of tumour progression and therapeutic response. Among them, M2-type macrophages (M2, as the major macrophage subtype in the tumour foci) have important promoting effects on various biological behaviours. Secreted protein acidic and rich in cysteine (SPARC) is an important anti-tumour component in the microenvironment of gastric cancer. This study shows that macrophages are an important source of the SPARC and that SPARC overexpression in M2 can reduce M2-mediated promoting proliferation, migration and anti-apoptotic effects in gastric cancer. Additionally, the AKT/mTOR signalling pathways may participate in the malignant process.
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- 2020
16. Aminooxyacetic acid (AOAA) sensitizes colon cancer cells to oxaliplatin via exaggerating apoptosis induced by ROS
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Yucun Liu, Guowei Chen, Xin Wang, Yisheng Pan, Shihao Guo, Pengyuan Wang, Shuai Zuo, Long Wen, Ju Ma, Shanwen Chen, Yongchen Ma, Xiaoqian Zhang, Yurong Wang, Jianwen Hu, Jing Zhu, Taohua Yue, Dingfang Bu, and Zihao Yao
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0301 basic medicine ,hydrogen sulfide ,colorectal cancer ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,In vivo ,medicine ,Caspase ,reactive oxygen species ,biology ,Cell growth ,apoptosis ,oxaliplatin ,Intrinsic apoptosis ,AOAA ,Cancer ,Glutathione ,medicine.disease ,Aminooxyacetic acid ,030104 developmental biology ,Oncology ,chemistry ,Apoptosis ,030220 oncology & carcinogenesis ,biology.protein ,Cancer research ,Research Paper - Abstract
Background: As the third confirmed gaseous transmitter, the role of hydrogen sulfide (H2S) in the pathogenesis of multiple types of cancer has been attracting increasing attention. Increased expression of cystathionine β-synthase (CBS) and H2S in colon cancer tissue samples has been validated and tumor-derived H2S, mainly produced by CBS, stimulates bioenergetics, cell proliferation, and angiogenesis in colon cancer. Recently, the therapeutic manipulation of H2S has been proposed as a promising anticancer approach. However, the effect of aminooxyacetic acid (AOAA), which has been widely used as an inhibitor of CBS dependent synthesis of H2S, on the chemotherapeutic effect of oxaliplatin (OXA) and the underlying mechanisms remain to be illustrated. Methods: We examined the expression of CBS in human colorectal cancer specimens and matched normal mucosa by immunohistochemistry. The effect of AOAA on the sensitivity of colon cancer cells to OXA and the level of apoptosis induced by caspase cascade was investigated in both HCT116 and HT29 cell lines utilizing CCK-8 assays, flow cytometry analysis and western blot analysis. The endogenous levels of reactive oxygen species (ROS) were detected fluorescently by DCF-DA, and glutathione (GSH) levels were measured by a Total GSH Detection Kit. Tumor bearing xenograft mouse models and in vivo imaging systems were further used to investigate the effect of AOAA in vivo and immunohistochemistry (IHC) and TUNEL analysis were performed. Results: In the current study, we confirmed CBS, the main target of AOAA, is overexpressed in human colorectal cancer by immunohistochemistry. The inhibitory effect of AOAA on the synthesis of H2S was validated utilizing fluorescent probe and specific electrode. AOAA significantly reduced the IC50 values of OXA in both colon cancer cell lines. Co-incubation with AOAA elicited increased apoptosis induced by OXA, featured by increased activation of caspase cascade. Besides, AOAA further increased the levels of ROS induced by OXA and attenuated the synthesis of glutathione (GSH), which is a vital antioxidant. Besides, the results of in vivo imaging and following IHC and TUNEL analysis were in accordance with cellular experiments, indicating that AOAA sensitizes colon cancer cells to OXA via exaggerating intrinsic apoptosis. Conclusion: The results suggested that CBS is overexpressed in colorectal cancer tissues and AOAA sensitizes colon cancer cells to OXA via exaggerating apoptosis both in vitro and in vivo. Decreasing the endogenous level of GSH and consequently impaired detoxification of ROS might be one of the mechanisms underlying the effect of AOAA.
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- 2020
17. A Novel Fish Counting Method Based on Multiscale and Multicolumn Convolution Group Network
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Yuxuan Zhang, Junfeng Wu, Hong Yu, Shihao Guo, Yizhi Zhou, and Jing Li
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- 2022
18. Fabrication of Coral Tentacle-Like Zif-67 Derived Ni-Co Ldh/Ag Nanowires on Cotton Fibers for Wearable Supercapacitor Electrode Materials
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Dangge Gao, Jiamin Zhu, Bin Lyu, Jianzhong Ma, Yingying Zhou, Ping Zhao, and Shihao Guo
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History ,Polymers and Plastics ,Business and International Management ,Industrial and Manufacturing Engineering - Published
- 2022
19. The CBS-H(2)S axis promotes liver metastasis of colon cancer by upregulating VEGF through AP-1 activation
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Shihao Guo, Jichang Li, Zhihao Huang, Taohua Yue, Jing Zhu, Xin Wang, Yucun Liu, Pengyuan Wang, and Shanwen Chen
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Transcription Factor AP-1 ,Vascular Endothelial Growth Factor A ,Cancer Research ,Mice ,Oncology ,Colonic Neoplasms ,Liver Neoplasms ,Animals ,Cystathionine beta-Synthase ,Humans ,Hydrogen Sulfide ,Article ,Cell Proliferation - Abstract
BACKGROUND: The main therapy for colon cancer with liver metastasis is chemotherapy based on 5-fluorouracil combined with targeted drugs. However, acquired drug resistance and severe adverse reactions limit patients’ benefit from standard chemotherapy. Here, we investigate the involvement of endogenous hydrogen sulfide (H(2)S) in liver metastasis of colon cancer and its potential value as a novel therapeutic target. METHODS: We used the CRISPR/Cas9 system to knockdown CBS gene expression in colon cancer cell lines. PCR arrays and proteome arrays were applied to detect the transcription and protein expression levels, respectively, of angiogenesis-related genes after knockdown. The molecular mechanism was investigated by western blot analysis, RT–qPCR, immunofluorescence staining, ChIP assays and dual-luciferase reporter assays. A liver metastasis mouse model was adopted to investigate the effect of targeting CBS on tumour metastasis in vivo. RESULTS: Knockdown of CBS decreased the metastasis and invasion of colon cancer cells and inhibited angiogenesis both in vivo and in vitro. Tissue microarray analysis showed a positive correlation between CBS and VEGF expression in colon cancer tissues. Further analysis at the molecular level validated a positive feedback loop between the CBS-H(2)S axis and VEGF. CONCLUSIONS: Endogenous H(2)S promotes angiogenesis and metastasis in colon cancer, and targeting the positive feedback loop between the CBS-H(2)S axis and VEGF can effectively intervene in liver metastasis of colon cancer.
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- 2021
20. Computer Prediction Model of the Election Result through BP Neural Network and Principal Component Analysis
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Xiaowen Lin, Shihao Guo, and Zhangteng Ma
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- 2021
21. Hydrophobic, flexible electromagnetic interference shielding films derived from hydrolysate of waste leather scraps
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Dangge Gao, Shihao Guo, Yingying Zhou, Bin Lyu, Jianzhong Ma, Ping Zhao, Dingjie Pan, and Shaowei Chen
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Biomaterials ,Colloid and Surface Chemistry ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials - Abstract
With the rapid development of wireless telecommunication technologies, it is of fundamental and technological significance to design and engineer high-performance shielding materials against electromagnetic interference (EMI). Herein, a three-step procedure is developed to produce hydrophobic, flexible nanofiber films for EMI shielding and pressure sensing based on hydrolysate of waste leather scraps (HWLS): (i) electrospinning preparation of HWLS/polyacrylonitrile (PAN) nanofiber films, (ii) adsorption of silver nanowires (AgNWs) onto HWLS/PAN nanofiber films, and (iii) coating of HWLS/PAN/AgNWs nanofiber films with polydimethylsiloxane (PDMS). Scanning electron microscopy studies show that AgNWs are interweaved with HWLS/PAN nanofibers to form a conductive network, exhibiting an electrical conductivity of 10
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- 2021
22. Overexpression of CBS/H
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Yuyang, Zhang, Shanwen, Chen, Jing, Zhu, Shihao, Guo, Taohua, Yue, Hao, Xu, Jianwen, Hu, Zhihao, Huang, Zeyang, Chen, Pengyuan, Wang, and Yucun, Liu
- Abstract
The role of hydrogen sulfide (HCell proliferation was assessed by Cell Counting Kit-8 (CCK-8), clone-formation and sphere formation assay. Cell migration was evaluated by transwell migration assay. Intracellular HOverexpression of CBS and exogenous HOverexpression of CBS and exogenous provision of H
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- 2021
23. Bio-modification and application of coal fly ash in cementitious composites
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Wenxing Wang, Shihao Guo, Xiaowei Gu, Xiaohui Li, Weiyu Huang, and Ang Li
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Materials Science (miscellaneous) - Published
- 2022
24. One-step synthesis of carbon sphere@ 1 T-MoS2 towards superior antiwear and lubricity
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Mengxin Xie, Bingli Pan, Hongyu Liu, Ning Li, Zhe Chen, Junjiang Yan, Zhaohui Fu, Shihao Guo, and Honggang Wang
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Mechanics of Materials ,Mechanical Engineering ,Surfaces and Interfaces ,Surfaces, Coatings and Films - Published
- 2022
25. Modeling and Analysis of the Influence of Directional Network Model on Music under Big Data Technology
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Erqiang Bao, Ting Gao, Yuru Huang, and Shihao Guo
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Measure (data warehouse) ,Computer science ,business.industry ,Big data ,Pearson product-moment correlation coefficient ,Task (project management) ,symbols.namesake ,Musicology ,Human–computer interaction ,Similarity (psychology) ,symbols ,Radar chart ,business ,Network model - Abstract
Music plays an important role in the development of human society. Because music itself is complex and difficult to quantify, how to judge the influence of music has become a difficult task. Based on big data technology, this paper constructs a music directional network, builds a comprehensive evaluation model based on intergenerational transmission and weight design reduction, measures the influence of each music genre and other genres, and visualizes it. In addition, we constructed a mathematical model based on the Pearson correlation coefficient to measure the similarity between songs and between musicians and genres. Finally, we also analyzed and evaluated the attributes of the artist through the radar chart. We hope that through this experiment, we can contribute to the study of music influence and the division of music genres.
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- 2021
26. FIRN: A Novel Fish Individual Recognition Method with Accurate Detection and Attention Mechanism
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Chunqi Gao, Junfeng Wu, Hong Yu, Jianhao Yin, and Shihao Guo
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Computer Networks and Communications ,Hardware and Architecture ,Control and Systems Engineering ,Signal Processing ,object detection ,fish individual recognition ,deep learning ,Electrical and Electronic Engineering - Abstract
Fish individual recognition technology is one of the key technologies to realize automated farming. Aiming at the deficiencies in the existing animal individual recognition technology, this paper proposes a method for individual recognition of underwater fish based on deep learning technology, which is divided into two parts: fish individual object detection and fish individual recognition. In the object detection part, the research has improved a new object detection for underwater fish based on the YOLOv4 algorithm, which changed the feature extraction network in YOLOv4 from CSP Darknet53 to Mobilenetv3 and changed the 3 × 3 convolution in the enhanced feature extraction network PANet to depthwise separable convolution. Compared with the original YOLOv4, the mean average precision is improved by 1.97%. For individual recognition, an algorithm called FIRN (Fish Individual Recognition Network) for individual recognition of underwater fish is proposed. The feature extraction network of the algorithm uses the improved ResNext50, and the loss function uses Arcface Loss. The CBAM attention module is introduced in the residual block of ResNext50, the max-pooling layer in the trunk is removed, and dilated convolution is introduced in the residual block, which increases the receptive field and improves the ability of feature extraction. Experiments show that the FIEN algorithm can enhance the compactness within a class while ensuring the separability between classes, and has a better recognition effect than other algorithms.
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- 2022
27. Two Similar Signatures for Predicting the Prognosis and Immunotherapy Efficacy of Stomach Adenocarcinoma Patients
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Xin Wang, Jichang Li, Zhihao Huang, Shuai Zuo, Jing Zhu, Taohua Yue, Shihao Guo, Pengyuan Wang, Yucun Liu, and Shanwen Chen
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0301 basic medicine ,Candidate gene ,Stromal cell ,QH301-705.5 ,medicine.medical_treatment ,Cell ,Biology ,03 medical and health sciences ,Cell and Developmental Biology ,0302 clinical medicine ,stomach adenocarcinoma ,medicine ,Biology (General) ,Gene ,macrophage abundance ,immunotherapy efficacy ,Original Research ,Tumor microenvironment ,Cell Biology ,Immunotherapy ,CD8A ,3-gene signature ,030104 developmental biology ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Cancer research ,prognosis ,Stem cell ,Developmental Biology - Abstract
BackgroundGlobally, stomach adenocarcinoma (STAD)’s high morbidity and mortality should arouse our urgent attention. How long can STAD patients survive after surgery and whether novel immunotherapy is effective are questions that our clinicians cannot escape.MethodsVarious R packages, GSEA software, Metascape, STRING, Cytoscape, Venn diagram, TIMER2.0 website, TCGA, and GEO databases were used in our study.ResultsIn the TCGA and GEO, macrophage abundance of STAD tissues was significantly higher than that of adjacent tissues and was an independent prognostic factor, significantly related to the overall survival (OS) of STAD patients. Between the high- and low- macrophage abundance, we conducted differential expression, univariate and multivariate Cox analysis, and obtained 12 candidate genes, and finally constructed a 3-gene signature. Both low macrophage abundance group and group D had higher TMB and PD-L1 expression. Furthermore, top 5 common gene-mutated STAD tissues had lower macrophage abundance. Macrophage abundance and 3 key genes expression were also lower in the Epstein-Barr Virus (EBV) and HM-indel STAD subtypes and significantly correlated with the tumor microenvironment score. The functional enrichment and ssGSEA revealed 2 signatures were similar and closely related to BOQUEST_STEM_CELL_UP, including genes up-regulated in proliferative stromal stem cells. Hsa-miR-335-5p simultaneously regulated 3 key genes and significantly related to the expression of PD-L1, CD8A and PDCD1.Conclusionmacrophage abundance and 3-gene signature could simultaneously predict the OS and immunotherapy efficacy, and both 2 signatures had remarkable similarities. Hsa-miR-335-5p and BOQUEST_STEM_CELL_UP might be novel immunotherapy targets.
- Published
- 2021
28. 1,25(OH)2D3 Attenuates IL-1β-Induced Epithelial-to-Mesenchymal Transition Through Inhibiting the Expression of lncTCF7
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Jing Zhu, Ju Ma, Shihao Guo, Pengyuan Wang, Shanwen Chen, Yucun Liu, Yongchen Ma, Tengyu Li, and Shuai Zuo
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Male ,0301 basic medicine ,Cancer Research ,Epithelial-Mesenchymal Transition ,Interleukin-1beta ,Mice, Nude ,Vimentin ,Calcitriol receptor ,Article ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Western blot ,medicine ,Animals ,Humans ,lncTCF7 ,Hepatocyte Nuclear Factor 1-alpha ,Epithelial–mesenchymal transition ,Vitamin D ,Epithelial–mesenchymal transition (EMT) ,Cell Proliferation ,medicine.diagnostic_test ,biology ,Chemistry ,Cell growth ,Cancer ,Promoter ,General Medicine ,medicine.disease ,Molecular biology ,030104 developmental biology ,Oncology ,IL-1β ,Vitamin D receptor ,030220 oncology & carcinogenesis ,biology.protein ,1,25(OH)2D3 ,Chromatin immunoprecipitation - Abstract
The activated form of vitamin D3, 1,25-dihydroxyvitamin D3 [1,25(OH)2D3], regulates numerous cellular processes, including inhibition of cancer progression. IL-1β has been reported to facilitate cancer development, especially by inducing an epithelial-to-mesenchymal transition (EMT) in several malignant tumors. However, the underlying mechanism of 1,25(OH)2D3 and IL-1β in colorectal cancer (CRC) still remains largely unknown. To fill in this knowledge gap, we measured cell proliferation and invasion by CCK-8 and Transwell assays after stimulation with 1,25(OH)2D3 and IL-1β. E-cadherin and vimentin were chosen as markers of EMT measured by immunofluorescence, quantitative real-time PCR (qRT-PCR), and Western blot. The expression and function of the vitamin D receptor (VDR) was evaluated by Western blot and luciferase reporter assay. qRT-PCR and RNA-FISH were performed to detect the expression and location of lncTCF7 in vitro. The binding sites of VDR in the lncTCF7 promoter were confirmed by a chromatin immunoprecipitation assay. Based on the above experiments, we found that 1,25(OH)2D3 attenuates IL-1β-induced increased proliferation and invasion in colorectal cancer through enhancing VDR, which inhibits the expression of lncTCF7 by directly binding to its promoter region.
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- 2019
29. Design and Simulation Analysis of the Folding DPF for Agricultural Diesel
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Shihao Guo, Xiang Wen, Lizhuang Dou, Guiyue Kou, and Mingfei Mu
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History ,Computer Science Applications ,Education - Abstract
According to the demand of diesel particulate filter (DPF) for agricultural machinery diesel, a folding DPF was designed by using metal fiber felt as filter element material. The flow characteristics in the designed DPF are simulated by CFD software Fluent, to optimize the structural parameters of the folding DPF. The results show that the pressure drop increases obviously when the ratio of filter element height to inlet height greater than 2; When keeping the filtering area unchanged, the pressure drops of odd filter layers 5, 7 are smaller than that of even filter layers 4, 6, 8, which can be reduced up to 14%; Increasing the length of the filter element helps to make the velocity distribution more uniform along the radial direction at the rear end of the DPF.
- Published
- 2022
30. Electrodeposited Ni-W coatings as the effective reaction barrier at Ga-21.5In-10Sn/Cu interfaces
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Zhaoqing Gao, Chen Wang, Nan Gao, Shihao Guo, Yinbo Chen, Zhenbang Chai, Yunpeng Wang, and Haitao Ma
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General Physics and Astronomy ,Surfaces and Interfaces ,General Chemistry ,Condensed Matter Physics ,Surfaces, Coatings and Films - Published
- 2022
31. Full‐Stokes Polarimetry for Visible Light Enabled by an All‐Dielectric Metasurface
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Yongze Ren, Shihao Guo, Wenqi Zhu, Pengcheng Huo, Sijia Liu, Song Zhang, Peng Chen, Lu Chen, Henri J. Lezec, Amit Agrawal, Yanqing Lu, and Ting Xu
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General Medicine - Published
- 2022
32. Live-cell fluorescence imaging reveals dynamic production and loss of bacterial flagella
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Zhuoran Li, Seiji Kojima, Chien-Jung Lo, Michio Homma, Ziyi Zhao, Pengyuan Wang, Fan Bai, Shihao Guo, and Xiang Yu Zhuang
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Cell division ,Cell ,Population ,Motility ,Flagellum ,Microbiology ,03 medical and health sciences ,Bacterial Proteins ,medicine ,education ,Molecular Biology ,Vibrio alginolyticus ,030304 developmental biology ,0303 health sciences ,education.field_of_study ,biology ,030306 microbiology ,Cell growth ,Cell Cycle ,Optical Imaging ,Gene Expression Regulation, Bacterial ,biology.organism_classification ,Cell biology ,medicine.anatomical_structure ,Microscopy, Fluorescence ,Flagella ,Bacteria ,Cell Division - Abstract
Bacterial flagella are nanomachines that drive bacteria motility and taxis in response to environmental changes. Whether flagella are permanent cell structures and, if not, the circumstances and timing of their production and loss during the bacterial life cycle remain poorly understood. Here we used the single polar flagellum of Vibrio alginolyticus as our model and implementing in vivo fluorescence imaging revealed that the percentage of flagellated bacteria (PFB) in a population varies substantially across different growth phases. In the early-exponential phase, the PFB increases rapidly through the widespread production of flagella. In the mid-exponential phase, the PFB peaks at around 76% and the partitioning of flagella between the daughter cells are 1:1 and strictly at the old poles. After entering the stationary phase, the PFB starts to decline, mainly because daughter cells stop making new flagella after cell division. Interestingly, we observed that bacteria can actively abandon flagella after prolonged stationary culturing, though cell division has long been suspended. Further experimental investigations confirmed that flagella were ejected in V. alginolyticus, starting from breakage in the rod. Our results highlight the dynamic production and loss of flagella during the bacterial life cycle. IMPORTANCE: Flagella motility is critical for many bacterial species. The bacterial flagellum is made up of about 20 different types of proteins in its final structure and can be self-assembled. The current understanding of the lifetime and durability of bacterial flagella is very limited. In the present study, we monitored Vibrio alginolyticus flagellar assembly and loss by in vivo fluorescence labeling, and found that the percentage of flagellated bacteria varies substantially across different growth phases. The production of flagella was synchronized with cell growth but stopped when cells entered the stationary phase. Surprisingly, we observed that bacteria can actively abandon flagella after prolonged stationary culturing, as well as in the low glucose buffering medium. We then confirmed the ejection of flagella in V. alginolyticus started with breakage of the rod. Our results highlight the dynamic production and loss of flagella during the bacterial life cycle.
- Published
- 2020
33. The effectiveness of gamification in programming education: Evidence from a meta-analysis
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Zehui Zhan, Luyao He, Yao Tong, Xinya Liang, Shihao Guo, and Xixin Lan
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Artificial Intelligence ,Computer Science Applications ,Education - Published
- 2022
34. Review of the applied mechanical problems in ocean thermal energy conversion
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Ye Li, Shihao Guo, Wei Zhang, and Wu Xiaoni
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Work (thermodynamics) ,Thermal efficiency ,Ocean thermal energy conversion ,Renewable Energy, Sustainability and the Environment ,business.industry ,020209 energy ,Fluid mechanics ,02 engineering and technology ,Power (physics) ,Steam turbine ,0202 electrical engineering, electronic engineering, information engineering ,Environmental science ,Current (fluid) ,business ,Thermal energy ,Marine engineering - Abstract
Ocean thermal energy attracted significant attention for its large storage in the ocean. With the increasing exploitation of ocean thermal energy due to the development of technology, several devices were proposed, which can be categorized into the closed cycle, open cycle and hybrid cycle systems. Many researchers have focused on the evaluation of these systems in regard to the economic evaluation, power and efficiency evaluation, function evaluation and environmental impact evaluation. To analyze the performance of such device in the ocean environment, several fluid mechanics problems need to be considered, including steam turbine specific for OTEC system, the wake induced by the long cold water pipe and the turbidity currents on the steep slope. The current work gives a review of these different systems, and presents the power and efficiency calculation formulas. The mechanical applications in the ocean thermal energy conversion (OTEC) system are then discussed.
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- 2018
35. Anisotropic Shape Memory Behaviors of Polylactic Acid/Citric Acid–Bentonite Composite with a Gradient Filler Concentration in Thickness Direction
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Ting-hua Cao, Ruimeng Wang, Fudong Wu, Shihao Guo, Chuanhui Xu, and Lihua Fu
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Thermogravimetric analysis ,Materials science ,Scanning electron microscope ,General Chemical Engineering ,Composite number ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Polylactic acid ,Chemical engineering ,Bentonite ,Fourier transform infrared spectroscopy ,0210 nano-technology ,Citric acid ,Dispersion (chemistry) - Abstract
To date, polylactic acid (PLA) composites with a uniform dispersion of fillers have been extensively studied. However, there is little research about the shape memory (SM) behavior of a PLA composite in which the nanoclays have a nonuniform dispersion. In this paper, the alkaline calcium bentonite (ACBT) was first modified by citric acid (CA) to improve the compatibility between bentonite (BT) and PLA. The structure of CA-modified bentonite (CABT) was characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Then the CABT/PLA composite with gradient concentration of CABT in thickness direction was fabricated. Because of the good affinity between the grafted CA and the ester groups, the CABT imposed powerful restrictions on the PLA chains, which contributed to the anisotropic driving force for shape recovery. The relationship between the structure and the properties and the mechanism of anisotropic SM...
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- 2018
36. Dynamic production and loss of flagellar filaments during the bacterial life cycle
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Pengyuan Wang, Shihao Guo, Michio Homma, Chien-Jung Lo, Fan Bai, Xiang-Yu Zhuang, Ziyi Zhao, Seiji Kojima, and Zhuoran Li
- Subjects
education.field_of_study ,Cell division ,biology ,Chemistry ,Population ,Bacterial growth ,Flagellum ,biology.organism_classification ,Cell biology ,Protein filament ,Extracellular ,Basal body ,education ,Bacteria - Abstract
Bacterial flagella are large extracellular protein organelles that drive bacteria motility and taxis in response to environmental changes. Previous research has focused mostly on describing the flagellar assembly, its rotation speed and power output. However, whether flagella are permanent cell structures and, if not, the circumstances and timing of their production and loss during the bacterial life cycle remain poorly understood. Here we used the single polar flagellum ofVibrio alginolyticusas our model and, usingin vivofluorescence imaging, revealed that the percentage of flagellated bacteria (PFB) in a population varies substantially across different bacterial growth phases. In the early-exponential phase, the PFB increases rapidly in respect to incubation time, mostly through widespread flagella production. In the mid-exponential phase, the PFB peaks at around 76% and the partitioning of flagella between the daughter cells is 1:1 and strictly at the old poles. After entering the stationary phase, the PFB starts to decline, mainly because daughter cells stop making new flagella after cell division. Interestingly, we discovered that bacteria can actively abandon flagella after prolonged stationary culturing, though cell division has long been suspended. Lack of glucose was found to be a major factor promoting flagellar disassembly. We also revealed that the active loss of flagella was initiated by breakage in the rod connecting the extracellular filament to the basal body formed by MS- and C-rings. Our results highlight the dynamic production and loss of flagellar filaments during the bacterial life cycle.
- Published
- 2019
- Full Text
- View/download PDF
37. The administration of Escherichia coli Nissle 1917 ameliorates irinotecan-induced intestinal barrier dysfunction and gut microbial dysbiosis in mice
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Mei Feng, Shihao Guo, Lie Sun, Shanwen Chen, Taohua Yue, Yurong Wang, Pengyuan Wang, Qisheng Hou, Yisheng Pan, Hao Xu, and Yucun Liu
- Subjects
0301 basic medicine ,Diarrhea ,Male ,Gastrointestinal Diseases ,medicine.medical_treatment ,Intraperitoneal injection ,Ileum ,Gut flora ,Irinotecan ,digestive system ,030226 pharmacology & pharmacy ,General Biochemistry, Genetics and Molecular Biology ,Microbiology ,03 medical and health sciences ,Mice ,0302 clinical medicine ,Western blot ,Claudin-1 ,medicine ,Escherichia coli ,Animals ,Humans ,General Pharmacology, Toxicology and Pharmaceutics ,Intestinal Mucosa ,Barrier function ,Mice, Inbred BALB C ,Intestinal permeability ,Tight Junction Proteins ,biology ,Tight junction ,medicine.diagnostic_test ,Chemistry ,Probiotics ,General Medicine ,biology.organism_classification ,medicine.disease ,Gastrointestinal Microbiome ,Intestines ,Intestinal Diseases ,030104 developmental biology ,medicine.anatomical_structure ,Dysbiosis ,Caco-2 Cells - Abstract
Aims The present study investigated the effect of Escherichia coli Nissle 1917 (EcN) on irinotecan-induced intestinal barrier dysfunction and gut microbial dysbiosis in a mouse model and in the human colonic cells lines Caco-2. Materials and methods Male BALB/c mice received irinotecan intraperitoneal injection with or without EcN administration intragastrically. Body weight, diarrhea severity, intestinal permeability and histopathological analysis of ileum epithelia of mice from different groups were assessed. The expression and localization of tight junction proteins were examined using western blot and immunofluorescence. Gut microbiota structure and diversity were measured with 16 S rRNA sequencing. Caco-2 monolayers were incubated with EcN culture supernatant (EcNsup) or SN-38 and the monolayer barrier function was assessed by transepithelial electrical resistance (TER) and FITC-dextran 4000 Da (FD-4) flux. Key findings Pretreatment with EcN significantly attenuated irinotecan-induced weight loss and diarrhea in mice. In addition, EcN inhibited the increased intestinal permeability and decreased Claudin-1 expression in irinotecan-treated mice. Furthermore, irinotecan treatment decreased the diversity of gut microbiota and increased the relative abundance of Proteobacteria compared to control group. EcN administration ameliorated the gut microbiota dysbiosis. In Caco-2 monolayers, EcNsup ameliorated the decreased TER and increased FD-4 flux elicited by SN-38. Moreover, EcNsup attenuated SN-38-induced altered localization and distribution of Claudin-1 in Caco-2 monolayers. Significance Our results indicated that the administration of EcN protected against irinotecan-induced intestinal injury by regulating intestinal barrier function and gut microbiota.
- Published
- 2019
38. Escherichia coli Nissle 1917 Protects Intestinal Barrier Function by Inhibiting NF
- Author
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Shihao, Guo, Shanwen, Chen, Ju, Ma, Yongchen, Ma, Jing, Zhu, Yuanyuan, Ma, Yucun, Liu, Pengyuan, Wang, and Yisheng, Pan
- Subjects
Male ,Tight Junction Proteins ,Blotting, Western ,NF-kappa B ,Transcription Factor RelA ,Tight Junctions ,Mice, Inbred C57BL ,Mice ,Occludin ,Sepsis ,Escherichia coli ,Zonula Occludens-1 Protein ,Animals ,Humans ,Caco-2 Cells ,Intestinal Mucosa ,Phosphorylation ,Signal Transduction ,Research Article - Abstract
Escherichia coli Nissle 1917 (EcN), a kind of probiotic, has been reported to have a protective effect on the intestinal barrier function and can ameliorate certain gastrointestinal disorders. In this study, the potential protective effect of EcN on the intestinal barrier function in a septic mouse model induced by cecal ligation and puncture (CLP) operation was investigated. FITC-Dextran 4,000 Da (FD-4) flux and the expression levels of tight junction (TJ) proteins were measured to evaluate the protective effect of EcN on the intestinal barrier function. Then, Caco-2 monolayers were utilized to further investigate the protective effect of the EcN supernatant (EcNsup) on the barrier dysfunction induced by TNF-α and IFN-γ in vitro; the plasma level of both the cytokines increased significantly during sepsis. Transepithelial electrical resistance (TEER) and FD-4 transmembrane flux were measured, and the localization of ZO-1 and Occludin was investigated by immunofluorescence. The expression of MLCK and the phosphorylation of MLC were detected by western blot. The activation of NF-κB was explored by immunofluorescence, and CHIP assays were performed to investigate the conjunction of NF-κB with the promoter of MLCK. The results indicated that EcN protected the intestinal barrier function in sepsis by ameliorating the altered expression and localization of TJ proteins and inhibiting the NF-κB-mediated activation of the MLCK-P-MLC signaling pathway which might be one of the mechanisms underlying the effect of EcN.
- Published
- 2019
39. Escherichia coli Nissle 1917 Protects Intestinal Barrier Function by Inhibiting NF-κB-Mediated Activation of the MLCK-P-MLC Signaling Pathway
- Author
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Shanwen Chen, Yongchen Ma, Yucun Liu, Ju Ma, Yisheng Pan, Yuanyuan Ma, Pengyuan Wang, Jing Zhu, and Shihao Guo
- Subjects
0301 basic medicine ,medicine.diagnostic_test ,Tight junction ,Article Subject ,Immunology ,NF-κB ,Cell Biology ,Occludin ,Cell biology ,Blot ,03 medical and health sciences ,chemistry.chemical_compound ,030104 developmental biology ,0302 clinical medicine ,Western blot ,chemistry ,030220 oncology & carcinogenesis ,lcsh:Pathology ,medicine ,Phosphorylation ,Signal transduction ,Barrier function ,lcsh:RB1-214 - Abstract
Escherichia coli Nissle 1917 (EcN), a kind of probiotic, has been reported to have a protective effect on the intestinal barrier function and can ameliorate certain gastrointestinal disorders. In this study, the potential protective effect of EcN on the intestinal barrier function in a septic mouse model induced by cecal ligation and puncture (CLP) operation was investigated. FITC-Dextran 4,000 Da (FD-4) flux and the expression levels of tight junction (TJ) proteins were measured to evaluate the protective effect of EcN on the intestinal barrier function. Then, Caco-2 monolayers were utilized to further investigate the protective effect of the EcN supernatant (EcNsup) on the barrier dysfunction induced by TNF-α and IFN-γ in vitro; the plasma level of both the cytokines increased significantly during sepsis. Transepithelial electrical resistance (TEER) and FD-4 transmembrane flux were measured, and the localization of ZO-1 and Occludin was investigated by immunofluorescence. The expression of MLCK and the phosphorylation of MLC were detected by western blot. The activation of NF-κB was explored by immunofluorescence, and CHIP assays were performed to investigate the conjunction of NF-κB with the promoter of MLCK. The results indicated that EcN protected the intestinal barrier function in sepsis by ameliorating the altered expression and localization of TJ proteins and inhibiting the NF-κB-mediated activation of the MLCK-P-MLC signaling pathway which might be one of the mechanisms underlying the effect of EcN.
- Published
- 2019
- Full Text
- View/download PDF
40. Activated gastric cancer-associated fibroblasts contribute to the malignant phenotype and 5-FU resistance via paracrine action in gastric cancer
- Author
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Xin Wang, Shihao Guo, Yucun Liu, Pengyuan Wang, Taohua Yue, Shanwen Chen, Yongchen Ma, Ju Ma, Junling Zhang, Jianwen Hu, Jing Zhu, Tengyu Li, and Guowei Chen
- Subjects
0301 basic medicine ,Cancer Research ,Cell ,Activation ,lcsh:RC254-282 ,Flow cytometry ,03 medical and health sciences ,Paracrine signalling ,0302 clinical medicine ,Fibroblast activation protein, alpha ,Genetics ,medicine ,Viability assay ,Epithelial–mesenchymal transition ,lcsh:QH573-671 ,Cancer-associated fibroblasts ,medicine.diagnostic_test ,lcsh:Cytology ,business.industry ,digestive, oral, and skin physiology ,Cancer ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,medicine.disease ,digestive system diseases ,030104 developmental biology ,medicine.anatomical_structure ,Oncology ,Tumor progression ,Drug resistance ,030220 oncology & carcinogenesis ,Cancer research ,Primary Research ,Gastric cancer ,business - Abstract
Background Cancer-associated fibroblasts (CAFs) play important roles in tumor progression. However, the behaviors of activated CAFs in gastric cancer remain to be determined. The aim of the present study was to investigate the correlations between activated gastric CAFs and the prognosis of patients with gastric cancer, and to determine the effects of activated CAFs on the malignant phenotype and 5-fluorouracil resistance in this cancer. Methods Ninety-five patients with primary gastric cancer were enrolled in this study. Activation states of gastric CAFs were evaluated by immunohistochemistry. A modified method for the primary culture of gastric CAFs was employed. Types of CAFs and activation states were identified by immunocytochemical and immunofluorescent staining. Cell co-culture and gastric CAF conditioned medium transfer models were established to investigate the paracrine effects of activated CAFs on the migration and invasion of gastric cell lines. The half maximal inhibitory concentration of 5-fluorouracil and levels of cell apoptosis were examined using cell viability assay and flow cytometry, respectively. Protein expression levels of associated molecules were measured by Western blotting. Results Kaplan–Meier survival curves showed that activated gastric CAFs identified via fibroblast activation protein were significantly related to poorer cumulative survival in gastric cancer patients. Five strains of CAFs were successfully cultured via the modified culture method, and three gastric CAFs strains were identified as activated gastric CAFs. The migration and invasion abilities of gastric cells were significantly enhanced in both the co-culture group and the conditioned medium group. The half maximal inhibitory concentration for 5-fluorouracil in BGC-823 cells was elevated after treatment with conditioned medium, and early apoptosis was inhibited. Additionally, an obvious elevation of epithelial–mesenchymal transition level was observed in the conditioned medium group. Conclusions Activated gastric CAFs correlate with a poor prognosis of cancer patients and may contribute to the malignant phenotype and the development of resistance to 5-fluorouracil via paracrine action in gastric cancer. Gastric CAFs with a specific activation state might be used as a tumor biomarker within the microenvironment for prognosis and as a new therapeutic target for chemoresistant gastric cancer. Electronic supplementary material The online version of this article (10.1186/s12935-018-0599-7) contains supplementary material, which is available to authorized users.
- Published
- 2018
41. MOESM3 of Activated gastric cancer-associated fibroblasts contribute to the malignant phenotype and 5-FU resistance via paracrine action in gastric cancer
- Author
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Yongchen Ma, Zhu, Jing, Shanwen Chen, Tengyu Li, Ma, Ju, Shihao Guo, Jianwen Hu, Taohua Yue, Junling Zhang, Pengyuan Wang, Wang, Xin, Guowei Chen, and Yucun Liu
- Subjects
integumentary system - Abstract
Additional file 3. Wound-healing assay in MKN-45 and SGC-7901 cell lines. MKN-45 and SGC-7901 cells were co-cultured with GCAFs or CM from GCAFs for 72 hours before the wounds were generated. And the scratch area after 48 hours was measured to evaluate the migration abilities of cancer cells (scale bar=500 Âľm).
- Published
- 2018
- Full Text
- View/download PDF
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