68 results on '"Lou Liu"'
Search Results
2. Metabolomics variation profiling of vaginal discharge identifies potential targets for cervical cancer early warning
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Hanjie, Xu, Min, Liu, Yuexiao, Song, Lou, Liu, Feng, Xu, Jiale, Chen, Huiying, Zhan, Ye, Zhang, Yu, Chen, Mudan, Lu, and Daozhen, Chen
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Biophysics ,General Medicine ,Biochemistry - Published
- 2022
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3. Role of the GalNAc-galectin pathway in the healing of premature rupture of membranes
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Jia-Le Chen, Lou Liu, Xin-Rui Peng, Yan Wang, Xiang Xiang, Yu Chen, De-xiang Xu, and Daozhen Chen
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Background: Premature rupture of membranes is an important cause of preterm birth and its associated high infant mortality and morbidity, and is an important public health problem worldwide, but the mechanism is unknown, and clinical treatment is currently mainly conservative, with a lack of effective interventions. We compared the differential metabolites in vaginal secretions between patients with preterm premature rupture of membranes and those with normal pregnancies and screened for the protective substance N-acetyl-d-galactosamine (GalNAc), an important ligand for galectin, which has several biological activities such as anti-inflammatory, antioxidant and in vitro wound healing properties. Methods: We evaluated the inflammatory response, oxidative stress, proliferation migration, EMT and ECM remodelling of human amniotic epithelial cells (WISH) by ELISA, ROS, transwell, scratch and CCK-8 assays, and examined the expression of PCNA and AKT by Western Blot. Results: The results showed that GalNAc enhanced galectin production and inhibited cellular inflammation and oxidative stress, promoted cellular EMT and migration, and altered ECM composition. In addition, GalNAc reduced the total and phosphorylated protein levels of AKT enhancing the pro-cell migration ability of GalNAc to stimulate wound healing. Conclusions: The results showed that GalNAc enhanced galectin production and inhibited cellular inflammation and oxidative stress, promoted cellular EMT and migration, synthesized GAG and altered ECM composition. The GalNAc-galectin pathway may provide a theoretical basis and a new target for the prevention and treatment of premature rupture of membranes. This study provides a theoretical basis and a new target for the prevention and treatment of premature rupture of membranes.
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- 2023
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4. Identification of the clinical and neuroimaging characteristics in children with neuromyelitis optica spectrum disorders: a case series
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Zhan Zhang, Xing-lou Liu, Sai-nan Shu, Ling-ling Liu, Hua Zhou, and Feng Fang
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Pediatrics ,medicine.medical_specialty ,Expanded Disability Status Scale ,medicine.diagnostic_test ,business.industry ,Encephalopathy ,Magnetic resonance imaging ,Disease ,medicine.disease ,Neuroimaging ,Pediatrics, Perinatology and Child Health ,Cohort ,medicine ,Biomarker (medicine) ,Original Article ,Optic neuritis ,business - Abstract
Background Childhood neuromyelitis optica spectrum disorders (NMOSDs) may cause visual impairment and brain or spinal cord damage, and the effects may be permanent if left untreated. Since the incidence of NMOSD cases in children is relatively low, the understanding of NMOSD among children is inadequate. Methods This investigation examined the clinical and neuroimaging characteristics of childhood NMOSD. We retrospectively analyzed the clinical information of 11 NMOSD patients admitted to our centre from 2012 to 2021. The disease status was assessed by the Expanded Disability Status Scale (EDSS) score. Results The two major symptoms observed in the study cohort were optic neuritis (ON) (9/11) and encephalopathy (7/11). Antibody tests were performed on 8 children, 2 of whom showed serum aquaporin 4 (AQP4) antibody positivity, and another 2 presented with serum myelin oligodendrocyte glycoprotein (MOG) antibody positivity. All patients showed white matter hyperintensity on magnetic resonance imaging (MRI) scans. Interestingly, a rare radiological sign, enlarged perivascular space (PVS), which is more commonly observed in the elderly or adults, was found in 4 participants with more severe clinical manifestations. Conclusions While NMOSD in children is less commonly diagnosed through clinical evaluations, the symptoms of ON and encephalopathy should raise the possibility of the disease. As the diagnosis of NMOSD in children is relatively difficult, enlarged PVS may represent a promising biomarker for the diagnosis and evaluation of NMOSD.
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- 2021
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5. Microbiome-metabolome analysis reveals cervical lesion alterations
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Hanjie Xu, Lou Liu, Feng Xu, Min Liu, Yuexiao Song, Jiale Chen, Huiying Zhan, Ye Zhang, Dexiang Xu, Yu Chen, Mudan Lu, and Daozhen Chen
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Biophysics ,General Medicine ,Biochemistry - Abstract
Cervical cancer (CC) continues to be one of the most common cancers among females worldwide. It takes a few years or even decades for CC to arise in a minority of women with cervical precancers. An increasing corpus of studies today indicates that local microecology and carcinogenesis are intimately related. To investigate the changes in cericovaginal microecology with the development of cervical cancer, we performed 16S rDNA sequencing and metabolomic analysis in cericovaginal fluid from 10 LSIL patients, 10 HSIL patients, 10 CC patients and 10 healthy controls to reveal the differential flora and metabolites during cervical carcinogenesis. Carcinogenesis is associated with alterations in microbiome diversity, individual taxa, and functions with notable changes in
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- 2022
6. The Role of Autophagy in Murine Cytomegalovirus Hepatitis
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Xing-lou Liu, Lin-Lin Zhang, Yidan Bi, Yuanyuan Lu, Feng Fang, and Xinyan Zhang
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0301 basic medicine ,Human cytomegalovirus ,Muromegalovirus ,viruses ,Immunology ,Cytomegalovirus ,Inflammation ,Biology ,Hepatitis ,Pathogenesis ,Mice ,Phosphatidylinositol 3-Kinases ,03 medical and health sciences ,0302 clinical medicine ,stomatognathic system ,Western blot ,Virology ,Autophagy ,medicine ,Animals ,Protein kinase B ,PI3K/AKT/mTOR pathway ,Mice, Inbred BALB C ,medicine.diagnostic_test ,virus diseases ,medicine.disease ,030104 developmental biology ,Cytomegalovirus Infections ,Molecular Medicine ,030211 gastroenterology & hepatology ,medicine.symptom - Abstract
Autophagy is involved in the pathogenesis of multiple pathogen infection. Previous studies have reported that human cytomegalovirus (CMV) activates autophagy in the early stage of infection and then inhibits autophagy. Little is known about the role of autophagy in murine CMV (MCMV) infection, especially in MCMV-induced hepatitis. The purpose of this study is to investigate the role of autophagy in MCMV hepatitis. BALB/c mice were infected with MCMV and a series of experiments involving western blot, immunofluorescence, immunohistochemistry, HE (Hematoxylin and Eosin) staining and quantitative real-time polymerase chain reaction were performed in this study. The expression of SQSTM1/p62, PI3K, the ratio of phosphorylated Akt to total Akt, and the ratio of phosphorylated mammalian target of rapamycin (mTOR) to total mTOR were increased, and the expression of light-chain 3 (LC3)-II were decreased in the livers of infected mice on days 3 and 7 postinfection (p.i.). Compared with the untreated infected group, increased transcription level of MCMV glycoprotein B (gB), increased expression levels of interleukin1-β (IL-1β), aspartate aminotransferase (AST) and alanine aminotransferase (ALT), decreased expression level of type I interferon α (IFN-α), as well as aggravated liver pathological injury were detected in starvation-treated infected group on days 3 and 7 p.i.; whereas decreased transcription level of MCMV gB, decreased expression levels of IL-1β, AST and ALT, increased expression level of type I IFN-α, as well as alleviated liver pathological injury were detected in chloroquine (CQ)-treated infected group on day 3 p.i. In conclusion, autophagy is inhibited through activating the PI3K/Akt/mTOR pathway in the liver of BALB/c mice during MCMV infection, and autophagy may promote MCMV replication and aggravate liver pathological damage and inflammation. Further understanding of the interactions between autophagy and MCMV infection and its potential mechanism may bring new important cues to the control of MCMV infection and antiviral therapy.
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- 2021
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7. Characterization of Vaginal Microbiota in Third Trimester Premature Rupture of Membranes Patients through 16S rDNA Sequencing
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Lou Liu, Jiale Chen, Yu Chen, Shiwen Jiang, Hanjie Xu, Huiying Zhan, Yongwei Ren, Dexiang Xu, Zhengfeng Xu, and Daozhen Chen
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Microbiology (medical) ,Infectious Diseases ,General Immunology and Microbiology ,Immunology and Allergy ,premature rupture of membranes ,16S rDNA sequencing ,vaginal dysbiosis ,Lactobacillus ,Molecular Biology - Abstract
In China, premature rupture of membranes (PROM) counts as a major pregnancy complication in China and usually results into adverse pregnancy outcomes. We analysed the vagina microbiome composition using 16S rDNA V3–V4 amplicon sequencing technology, in this prospective study of 441 women in their third trimester of pregnancy. We first divided all subjects into PROM and HC (healthy control) groups, in order to investigate the correlation of vagina microbiome composition and the development of PROM. We found that seven pathogens were higher in the PROM group as compared to the HC group with statistical significance. We also split all subjects into three groups based on Lactobacillus abundance-dominant (Lactobacillus > 90%), intermediate (Lactobacillus 30–90%) and depleted (Lactobacillus < 30%) groups, and explored nine pathogenic genera that were higher in the depleted group than the intermediate and dominant groups having statistical significance. Finally, using integrated analysis and logistics regression modelling, we discovered that Lactobacillus (coeff = −0.09, p = 0.04) was linked to the decreased risk of PROM, while Gardnerella (coeff = 0.04, p = 0.02), Prevotella (coeff = 0.11, p = 0.02), Megasphaera (coeff = 0.04, p = 0.01), Ureaplasma (coeff = 0.004, p = 0.01) and Dialister (coeff = 0.001, p = 0.04) were associated with the increased risk of PROM. Further study on how these pathogens interact with vaginal microbiota and the host would result in a better understanding of PROM development.
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- 2022
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8. The role of autophagy in human cytomegalovirus IE2 expression
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Xing-lou Liu, Xinyan Zhang, Yuanyuan Lu, Lin-Lin Zhang, Yuan Huang, Feng Fang, Ting Xi, and Yidan Bi
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Human cytomegalovirus ,Viral protein ,viruses ,Autophagy-Related Proteins ,Cytomegalovirus ,Biology ,Virus Replication ,medicine.disease_cause ,Immediate-Early Proteins ,03 medical and health sciences ,0302 clinical medicine ,Downregulation and upregulation ,Western blot ,Virology ,Autophagy ,medicine ,Humans ,030212 general & internal medicine ,Lung ,Cells, Cultured ,Gene knockdown ,medicine.diagnostic_test ,virus diseases ,RNA ,Transfection ,Fibroblasts ,medicine.disease ,Cell biology ,Infectious Diseases ,Gene Expression Regulation ,Host-Pathogen Interactions ,Ubiquitin-Conjugating Enzymes ,Trans-Activators ,030211 gastroenterology & hepatology - Abstract
The purpose of this study was to determine whether autophagy regulates the expression of human cytomegalovirus (HCMV) immediately early two viral protein (IE2). Rapamycin and 3-methyladenine (3-MA) were used to stimulate or suppress autophagy during HCMV infection. UL122 recombinant plasmid was transfected to overexpress IE2 and small interference RNA against autophagy-related protein 3 (ATG3) was used to knockdown ATG3. Western blot was performed to measure the expression of viral proteins and autophagy levels. Immunofluorescence was used to detect the immediately early 1 viral protein (IE1) expression. In human embryonic lung fibroblasts, infection of HCMV promotes the lipidation of light chain 3 (LC3) at 6 and 24 hours post infection (hpi), which was accompanied by the increased expression of viral protein IE2. When only IE2 was overexpressed via UL122 recombinant plasmid transfection without HCMV infection, the autophagy hallmarks LC3II and ATG3 were upregulated. Furthermore, viral protein IE2 expression was reduced at 24 and 48 hpi either by the treatment of autophagy inducer rapamycin or by the inhibitor 3-MA before HCMV infection. At the same time, small interference ATG3 transient transfection, used to suppress autophagy, significantly inhibited IE2 expression. However, when 3-MA was used to regulate autophagy levels after HCMV infection, expression of IE2 and IE1 were both decreased, while autophagy inducer rapamycin treatment after HCMV infection increased IE2 expression slightly. IE2 was involved in autophagy induced by HCMV infection and blocking autophagy could inhibit the expression of HCMV viral protein IE2, which might be one way for autophagy to restrict HCMV replication.
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- 2020
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9. Detection of Vaginal Metabolite Changes in Premature Rupture of Membrane Patients in Third Trimester Pregnancy: a Prospective Cohort Study
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Han-Jie Xu, Hui-Ying Zhan, De-Xiang Xu, Daozhen Chen, Jia-Le Chen, Yu Chen, Zheng-Feng Xu, Lou Liu, and Zhong Chen
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Adult ,0301 basic medicine ,Vaginal dysbiosis ,China ,Fetal Membranes, Premature Rupture ,Asymptomatic vaginitis ,Pregnancy Trimester, Third ,Metabolite ,Physiology ,Pregnancy: Original Article ,Prom ,Vaginal microbiome ,Asymptomatic ,Antioxidants ,Young Adult ,03 medical and health sciences ,chemistry.chemical_compound ,Obstetric Labor, Premature ,0302 clinical medicine ,Pregnancy ,medicine ,Metabolomics ,Humans ,Sex organ ,Prospective Studies ,Gonadal Steroid Hormones ,Prospective cohort study ,030219 obstetrics & reproductive medicine ,Bacteria ,business.industry ,Microbiota ,Premature rupture of membranes ,Obstetrics and Gynecology ,Estriol ,medicine.disease ,female genital diseases and pregnancy complications ,030104 developmental biology ,chemistry ,Case-Control Studies ,Vagina ,Metabolome ,Dysbiosis ,Female ,Inflammation Mediators ,medicine.symptom ,business ,Glycolysis - Abstract
Premature rupture of membranes (PROM) is usually associated with pregnant and neonatal complications. Most of the PROM cases are caused by ascending asymptomatic genital infection. In China, PROM (15.3%) is more common than spontaneous preterm labor (7.3%) and leads to more adverse pregnancy outcomes. Here, we designed a prospective cohort study to measure the metabolomics changes in vaginal swab samples and explored their potential contribution to PROM. A total of 260 differentially expressed metabolites were identified and further analyzed. In the PROM group, N-acetyl-d-galactosamine and sucrose were downregulated (P = 0.0025, P = 0.0195, respectively), both of which are the upstream metabolites of the glycolysis pathway. Furthermore, estriol 3-sulfate 16-glucuronide (P = 0.0154) and 2-methoxy-17beta-estradiol 3-glucosiduronic acid (P = 0.004), two final metabolites in steroid hormone biosynthesis, were both downregulated in the PROM group. Finally, we found two catechin metabolites (epigallocatechin-7-glucuronide, P = 0.0009; 4′-methyl-epigallocatechin-7-glucuronide, P = 0.01) as well as DL-citrulline (P = 0.0393) were also significantly downregulated in the PROM group compared with the healthy control (HC) group, which are related to important antioxidant and anti-inflammatory activities in the human body. Altogether, metabolite changes in glycolysis, steroid hormone biosynthesis, and antioxidant/anti-inflammatory pathways may contribute to (or be a consequence of) vaginal dysbiosis and PROM. Metabolite pathway analysis is a new and promising approach to further investigate the mechanism of PROM and help prevent its unfavorable pregnant outcomes at a functional level. Trial registration number: ChiCTR2000034721
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- 2020
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10. Integrated metagenomics and metabolomics analysis of third-trimester pregnant women with premature membrane rupture: a pilot study
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Han-Jie Xu, Zheng-Feng Xu, Dao-Zhen Chen, Lou Liu, Hui-Ying Zhan, Zhong Chen, Jia-Le Chen, Yu Chen, and De-Xiang Xu
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medicine.medical_specialty ,Metabolomics ,Metagenomics ,business.industry ,Obstetrics ,Medicine ,Original Article ,General Medicine ,business ,Third trimester ,Premature membrane rupture ,female genital diseases and pregnancy complications - Abstract
BACKGROUND: Premature rupture of membranes (PROM) is a major pregnancy complication in China and usually leads to adverse pregnancy outcomes. The major aim of this study was to search for microorganisms and their related metabolites that have direct relationship with PROM. METHODS: For vaginal discharge samples, metagenomics sequencing was applied to identify microorganisms that were enriched in PROM subjects, and untargeted metabolomics was applied to characterize the metabolites changes in PROM subjects compared to healthy controls (HC). Correlation analysis was then used to explore the relationship between these microorganisms and metabolites changes. RESULTS: Two upstream metabolites of glycolysis, N-acetyl-D-galactosamine (GalNAc) and sucrose, were found downregulated in the PROM group (P=0.04 and P=0.041, respectively). Higher percentages of conditional pathogens, such as of Streptococcus (8.4% vs. 6.1% in HC group, P=0.15) and Chlamydia (4.3% vs. 2.3% in HC group, P=0.07) were found in PROM group. Other common conditional pathogens including Prevotella, Staphylococcus, Mycobacterium and Enterobacter, were also higher in PROM group, although their absolute percentages were low and the differences did not reach statistical significance due to relative small sample size. Correlation analysis further demonstrated a positive correlation of downregulation of glycolysis metabolites with higher percentage of conditional pathogens. CONCLUSIONS: Integrated metagenomics and metabolomics analysis can be used to track the subtle changes in the vaginal microenvironment. Downregulation of glycolysis substrates (GalNAc and sucrose) and increase of related pathogenic microorganisms (Streptococcus and Chlamydia) could serve as early warning biomarkers of PROM.
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- 2021
11. Long-term fertilization and intensive cropping enhance carbon and nitrogen accumulated in soil clay-sized particles of red soil in South China
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Lei Wu, Kai-lou Liu, Hu Xu, Jing-ye Zhang, Minggang Xu, Qing-hai Huang, Yichao Rui, Xianni Chen, Wenju Zhang, and Gilles Colinet
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Stratigraphy ,Phosphorus ,Bulk soil ,chemistry.chemical_element ,04 agricultural and veterinary sciences ,Soil carbon ,010501 environmental sciences ,engineering.material ,complex mixtures ,01 natural sciences ,Manure ,Animal science ,chemistry ,040103 agronomy & agriculture ,engineering ,0401 agriculture, forestry, and fisheries ,Fertilizer ,Soil fertility ,Cropping system ,Red soil ,0105 earth and related environmental sciences ,Earth-Surface Processes - Abstract
Understanding the underlying mechanism of soil carbon (C) and nitrogen (N) accumulation is of great significance for soil C sequestration and climate change mitigation, as well as soil fertility improvement. The objective of this study was to evaluate the response of C and N accumulation in aggregates and fine soil particles to long-term mineral fertilizer and manure application. Five treatments from a long-term experiment with double maize cropping were examined in this study, i.e., (1) no fertilizer (control); (2) mineral nitrogen, phosphorus, and potassium application (NPK); (3) doubled application rate of the NPK (2NPK); (4) pig manure alone (M); and (5) mineral NPK fertilizers and manure combination (NPKM). By using physical particle-sized fractionation, we analyzed soil organic carbon (OC) and total nitrogen (N), and δ13C of OC in bulk soil and aggregates (53–2000 μm) and, coarse silt-sized fraction (5–53 μm), fine silt-sized fraction (2–5 μm), and clay-sized fraction (
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- 2019
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12. Comparison of carbon sequestration efficiency in soil aggregates between upland and paddy soils in a red soil region of China
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Hui-wen Hu, Jing Huang, Qing-hai Huang, Huimin Zhang, Zhi-hua Hu, Kai-lou Liu, Da-ming Li, Yu Xichu, and Ye Huicai
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0106 biological sciences ,Agriculture (General) ,chemistry.chemical_element ,CSE ,Plant Science ,engineering.material ,Carbon sequestration ,01 natural sciences ,Biochemistry ,S1-972 ,Human fertilization ,Food Animals ,soil aggregate ,Stock (geology) ,long-term fertilization ,Ecology ,04 agricultural and veterinary sciences ,Soil carbon ,Nitrogen ,Manure ,C input ,chemistry ,Agronomy ,SOC stock ,040103 agronomy & agriculture ,engineering ,0401 agriculture, forestry, and fisheries ,Environmental science ,Animal Science and Zoology ,Fertilizer ,Red soil ,Agronomy and Crop Science ,010606 plant biology & botany ,Food Science - Abstract
There is limited information on carbon sequestration efficiency (CSE) of soil aggregates in upland and paddy soils under long-term fertilization regimes. In a red soil region of southern China, an upland soil experiment started in 1986 and a paddy soil experiment commenced in 1981. These experiments were conducted using different fertilization treatments. After 30 years, soil organic carbon (SOC) content and stock of different aggregate components were analyzed. The results showed that the SOC contents and stocks in upland soil were lower than in paddy soil. In both upland and paddy soils, the SOC contents and stocks of all aggregate components in NPKM (combined treatment with chemical nitrogen (N), phosphorus (P), potassium (K) fertilizers and manure) were the highest among all treatments. Compared with CK (no fertilizer), SOC content of all aggregate components in NPKM was increased by 13.21−63.11% and 19.13−73.33% in upland and paddy soils, respectively. Meanwhile, the change rates in SOC stock of all aggregate components in upland soil were lower than in paddy soil, although the change rate of SOC stock of all aggregate components in NPKM was higher than in other treatments. Furthermore, a linear equation could fit the relationships between carbon (C) input and change rate of SOC stock (P
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- 2019
13. TMT based proteomic profiling of Sophora alopecuroides leaves reveal flavonoid biosynthesis processes in response to salt stress
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Tian-Li Ma, Wen-Juan Li, Yuan-Shu Hong, Yu-Mei Zhou, Lei Tian, Xiao-Gang Zhang, Feng-Lou Liu, and Ping Liu
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Flavonoids ,Plant Leaves ,Proteomics ,Plant Breeding ,Gene Expression Regulation, Plant ,Stress, Physiological ,Biophysics ,Biochemistry ,Salt Stress ,Sophora ,Plant Proteins - Abstract
Salt stress is the major abiotic stress worldwide, adversely affecting crop yield and quality. Utilizing salt tolerance genes for the genetic breeding of crops is one of the most effective measures to withstand salinization. Sophora alopecuroides is a well-known saline-alkaline and drought-tolerant medicinal plant. Understanding the underlying molecular mechanism for Sophora alopecuroides salt tolerance is crucial to identifying the salt-tolerant genes. In this study, we performed tandem mass tag (TMT) based proteomic profiling of S. alopecuroides leaves under 150 mM NaCl induced salt stress condition for 3 d and 7 d. Data are available on ProteomeXchange (PXD027627). Furthermore, the proteomic findings were validated through parallel reaction monitoring (PRM). We observed that the expression levels of several transporter proteins related to the secondary messenger signaling pathway were altered under salt stress conditions induced for 3 d. However, the expression of the certain transferase, oxidoreductase, dehydrogenase, which are involved in the biosynthesis of flavonoids, alkaloids, phenylpropanoids, and amino acid metabolism, were mainly alerted after 7 d post-salt-stress induction. Several potential genes that might be involved in salt stress conditions were identified; however, it demands further investigation. Although salt stress affects the level of secondary metabolites, their correlation needs to be investigated further. SIGNIFICANCE: Salinization is the most severe abiotic adversity, which has had a significant negative effect on world food security over the time. Excavating salt-tolerant genes from halophytes or medicinal plants is one of the important measures to cope with salt stress. S. alopecuroides is a well-known medicinal plant with anti-tumor, anti-inflammatory, and antibacterial effects, anti-saline properties, and resistance to drought stress. Currently, only a few studies have explored the S. alopecuroides' gene function, and regulation and these studies are mostly related to the unpublished genome sequence information of S. alopecuroides. Recently, transcriptomics and metabolomics studies have been carried on the abiotic stress in S. alopecuroides roots. Multiple studies have shown that altered gene expression at the transcript level and altered metabolite levels do not correspond to the altered protein levels. In this study, TMT and PRM based proteomic analyses of S. alopecuroides leaves under salt stress condition induced using 150 mM NaCl for 3 d and 7 d was performed. These analyses elucidated the activation of different mechanisms in response to salt stress. A total of 434 differentially abundant proteins (DAPs) in salt stress conditions were identified and analyzed. For the first time, this study utilized proteomics technology to dig out plentiful underlying salt-tolerant genes from the medicinal plant, S. alopecuroides. We believe that this study will be of great significance to crop genetics and breeding.
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- 2021
14. Balanced fertilization over four decades has sustained soil microbial communities and improved soil fertility and rice productivity in red paddy soil
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Ren Fang Shen, Dong Li, Jia Lin Wang, Kai Lou Liu, Hao Qing Zhang, Jiao Jiao Li, and Xueqiang Zhao
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Environmental Engineering ,Microbiota ,Agriculture ,Oryza ,engineering.material ,Biology ,Pollution ,Manure ,Crop ,Soil ,Nutrient ,Microbial population biology ,Agronomy ,Fertilization ,engineering ,Environmental Chemistry ,Ecosystem ,Fertilizer ,Soil fertility ,Fertilizers ,Waste Management and Disposal ,Organic fertilizer ,Soil Microbiology - Abstract
The influence of long-term fertilization on soil microbial communities is critical for revealing the association between belowground microbial flora and aboveground crop productivity—a relationship of great importance to food security, environmental protection, and ecosystem functions. Here, we examined shifts in soil chemical properties, microbial communities, and the nutrient uptake and yield of rice subjected to different chemical and organic fertilization treatments over a 40-year period in red paddy soil. Ten different treatments were used: a control without fertilizer, and applications of nitrogen (N), phosphorus (P), potassium (K), NP, NK, PK, NPK, double NPK, or NPK plus manure. Compared with the effects of withholding one or two nutrients (N, P, or K), the balanced application of chemical NPK and organic fertilizers markedly improved soil nutrient status and rice yield. This improvement of soil fertility and rice yield was not associated with bacterial, archaeal, or fungal alpha diversities. The bacterial abundance and community structure and archaeal abundance effectively explained the variation in rice yield, whereas those of fungi did not. The community structure of bacteria and archaea, but not that of fungi, was correlated with soil properties. Among various soil properties, P was the key factor influencing rice yield and soil microbial communities because of the extremely low content of soil available P. Seven keystones at the operational taxonomic unit level were identified: four archaea (belonging to Thermoplasmata, Methanosaeta, Bathyarchaeia, and Nitrososphaeraceae) and three bacteria (in Desulfobacteraceae and Acidobacteriales). These keystones, which were mainly related to soil C and N transformation and pH, may work cooperatively to influence rice yield by regulating soil fertility. Our results collectively suggest that four decades of balanced fertilization has sustained the bacterial and archaeal abundances, bacterial community structure, and keystones, which potentially contribute to soil fertility and rice yield in red paddy soil.
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- 2021
15. Hot topics and frontier evolution of research on entrepreneurial intentions——Visual analysis based on the core collection of Web of science database
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Bingni Chen and Lou Liu
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Focus (computing) ,Entrepreneurship ,Database ,business.industry ,Energy (esotericism) ,Distribution (economics) ,computer.software_genre ,Antecedent (grammar) ,Environmental sciences ,Frontier ,Order (exchange) ,Slogan ,GE1-350 ,Sociology ,business ,computer - Abstract
Since the Chinese slogan “Mass Entrepreneurship, Mass Innovation” was put forward, entrepreneurship has become a hot topic of research in academic circles and even people from all walks of life. Entrepreneurial Intentions is the best indicator to effectively predict entrepreneurial behavior. In order to understand the research status and trends of entrepreneurship intentions, based on the bibliometric method, this paper uses citespace software to visually analyze 1,038 core collections published in the Web of science database platform from January 1, 1997 to December 31, 2020. The results show that in the past 20 years, the research on entrepreneurial intentions has mainly focused on scholars from foreign universities. The distribution of research institutions is relatively concentrated, but the distribution of journals is relatively loose. Antecedent variables have become the focus of research. Future research should focus on outcome variables.
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- 2021
16. Inhibition of autophagy by 3-methyladenine restricts murine cytomegalovirus replication
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Zhan Zhang, Yuan Yuan Lu, Yidan Bi, Sai-nan Shu, Ting Xi, Lin-Lin Zhang, Xing-lou Liu, Feng Fang, Yuan Huang, and Xinyan Zhang
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Programmed cell death ,Muromegalovirus ,Apoptosis ,Biology ,Virus Replication ,03 medical and health sciences ,RIPK1 ,Mice ,0302 clinical medicine ,Virology ,medicine ,Autophagy ,Animals ,030212 general & internal medicine ,Fibroblast ,Antigens, Viral ,Caspase 3 ,Adenine ,Embryo ,Chloroquine ,Herpesviridae Infections ,Molecular biology ,Virus Release ,Mice, Inbred C57BL ,Infectious Diseases ,medicine.anatomical_structure ,Viral replication ,030211 gastroenterology & hepatology ,sense organs - Abstract
Background Cytomegalovirus (CMV) induced autophagy affects virus replication and survival of the infected cells. The purpose of this study was to investigate the role of autophagy inhibition by 3-methyladenine (3-MA) on murine cytomegalovirus (MCMV) replication and whether it is associated with caspase-3 dependent apoptosis. Methods The eyecup isolated from adult C57BL/6J mice (6-8 weeks old) and mouse embryo fibroblast cells (MEFs) were infected with MCMV K181 strain, followed by the treatment of 3-methyladenine (3-MA), chloroquine(CQ) or rapamycin to block or stimulate autophagy. Results In cultured MEFs, the ratio of LC3I/II was reduced at 24 hours post infection (h.p.i.), but was increased at 48h.p.i. In the eyecup culture, LC3I/II ratio was also decreased at 4 and 7days post infection (d.p.i.). In addition, caspase-3 cleavage was increased at 48h.p.i. in MEFs and also elevated in MCMV infected eyecups at 4, 7, 10 and 14d.p.i. 3-MA treatment significantly inhibited the virus replication in MEFs and eyecups. The expression of early antigen (EA) of MCMV was also decreased in MEFs and eyecups. Meanwhile, cleaved caspase-3 dependent cell death was promoted with the presence of 3-MA in MCMV infected MEFs and eyecups, while RIPK1/RIPK3/MLKL pathway was inhibited by 3-MA in eyecups. Conclusions Inhibition of autophagy by 3-MA restricts virus replication and promotes caspase-3 dependent apoptosis in the eyecup and MEFs with MCMV infection. It can be explained that during the early period of MCMV infection, suppressed autophagy process directly reduced virus release, but later caspase-3 dependent apoptosis dominated and resulted in decreased virus replication. This article is protected by copyright. All rights reserved.
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- 2020
17. Erratum: Optical soliton in a one-dimensional array of a metal nanoparticle-microcavity complex (2021 Commun. Theor. Phys. 73 115105)
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Ning Ji, Tao Shui, Yi-Lou Liu, Wang-Rui Zhang, Xiu-Mei Chen, and Wen-Xing Yang
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Physics and Astronomy (miscellaneous) - Published
- 2022
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18. Photon routing based on non-chiral interaction between atoms and waveguides
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Wang-Rui Zhang, Tao Shui, Yi-Lou Liu, Ning Ji, and Wen-Xing Yang
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Physics and Astronomy (miscellaneous) ,Physics::Optics ,Instrumentation - Abstract
The photon router plays an essential role in the optical quantum network. However, conventional routers generally couple photons chirally into waveguides to achieve complete transmission from the input port to the required port. Here, we use non-chiral photon-atom interactions for targeted routing. The system consists of two V-type three-level atoms and two parallel waveguides. In addition, the two atoms are driven by external coherent fields, respectively. With a real-space Hamiltonian, the probability of photon transmitted to four ports can be obtained. The study shows that a single photon input from the left port of the waveguide-a can be deterministically transferred to any of the four ports of the two waveguides by adjusting the detuning of the atom and the driving field on the atom, as well as the distance between the two atoms.
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- 2021
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19. Optical soliton in a one-dimensional array of a metal nanoparticle-microcavity complex
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Ning Ji, Wen-Xing Yang, Tao Shui, Yi-Lou Liu, Wang-Rui Zhang, and Xiu-Mei Chen
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Materials science ,Physics and Astronomy (miscellaneous) ,business.industry ,Optoelectronics ,Nanoparticle ,Soliton (optics) ,business - Published
- 2021
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20. [Basic soil productivity in the double rice cropping system under long-term fertilization regimes in the Poyang Lake region, China]
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Kai Lou, Liu, Tian Fu, Han, Qing Hai, Huang, Xi Chu, Yu, Da Ming, Li, Chang Bao, Ma, Yan Dong, Xue, and Hui Min, Zhang
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China ,Lakes ,Soil ,Agriculture ,Oryza ,Fertilizers - Abstract
We aimed to explore changes in basic soil productivity (BSP) under different fertilization regimes in the Poyang Lake region, Jiangxi Province, China. Soil samples were collected from a long-term fertilization experiment (since 1981) that included treatments of no fertilization (CK), chemical fertilization (NPK), and combined chemical and organic fertilization (NPKM). Then, a three-year pot experiment (from 2012 to 2014) with double rice cropping was conducted with two different fertilization regimes (no fertilization, F为探讨鄱阳湖流域不同施肥措施的土壤基础地力变化规律,基于长期施肥定位试验(始于1981年),采集定位30年时的不施肥(CK)、施用氮磷钾肥(NPK)和氮磷钾肥与有机肥配施(NPKM)土壤,于2012mdash;2014年进行连续3年的施肥和不施肥试验,分析水稻产量和土壤基础地力贡献率的差异及关键影响因子.结果表明:不论施肥与否,3年的水稻产量均表现出NPKM处理显著高于NPK和CK处理,尤其是在不施肥条件下,NPKM处理的年产量分别比CK和NPK处理增加37.7%~143.9%和20.8%~66.7%.3年间,CK、NPK和NPKM处理的土壤基础地力贡献率分别为41.8%~53.1%、45.2%~62.6%和59.1%~88.1%,且NPKM处理的土壤基础地力贡献率均显著高于NPK和CK处理.进一步分析发现,土壤有机质和有机碳平衡量与土壤基础地力贡献率呈显著正相关.总之,在鄱阳湖流域的双季稻田,长期有机无机肥配施有利于该地区土壤基础地力的提升,且土壤有机质和有机碳平衡是土壤基础地力变化的关键因子.
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- 2019
21. New prenylxanthones, polyketide hemiterpenoid pigments from the endophytic fungus Emericella sp. XL029 and their anti-agricultural pathogenic fungal and antibacterial activities
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Feng-Lou Liu, Deng-Feng Yang, Ting Zhao, Xue-Jiao Pang, Li-Zhen Fang, Lu-Lin Xu, Xiao-Long Yang, Hai-Li Qin, and Xia Wu
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biology ,010405 organic chemistry ,Chemistry ,General Chemical Engineering ,Pathogenic bacteria ,General Chemistry ,biology.organism_classification ,medicine.disease_cause ,Rhizoctonia ,01 natural sciences ,Physalospora ,0104 chemical sciences ,Microbiology ,010404 medicinal & biomolecular chemistry ,Staphylococcus aureus ,Fusarium oxysporum ,medicine ,Panax notoginseng ,Antibacterial activity ,Bacteria - Abstract
Four new prenylxanthones (1–4) together with five known compounds (5–9) were isolated from the solid-substrate fermentation culture of Emericella sp. XL029 associated with the leaves of Panax notoginseng. Their structures and relative configurations were elucidated by extensive spectroscopic analysis and comparison of NMR data to those of known compounds. The anti-agricultural pathogenic fungal and antibacterial activities of all isolated compounds were evaluated against eight agricultural pathogenic fungi and nine human pathogenic bacteria. The anti-agricultural pathogenic fungal assay indicated that compounds 1, 2, 4, 8 and 9 displayed significant activity against Drechslera maydis with MIC value of 25 μg mL−1. Moreover, compound 1 also exhibited significant activity against other three fungi including Rhizoctonia cerealis, Fusarium oxysporum and Physalospora piricola, and compounds 4 and 9 against Rhizoctonia cerealis with MIC value of 25 μg mL−1. Compound 5 only demonstrated significant activity against Physalospora piricola with MIC value of 25 μg mL−1. Further antibacterial activity tests revealed that compounds 1–9 showed significant antibacterial activity against all tested Gram-positive (except for drug resistant Staphylococcus aureus) and Gram-negative bacteria with MIC values ranging from 12.5 to 50 μg mL−1. While only compounds 1, 4 and 9 displayed moderate activity against drug resistant Staphylococcus aureus with MIC value of 50 μg mL−1.
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- 2017
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22. Short-lived AIM2 Inflammasome Activation Relates to Chronic MCMV Infection in BALB/c Mice
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Lin-Lin Zhang, Yuanyuan Lu, Feng Fang, Ting Xi, Yi Liao, Yuan Huang, Ya-Nan Zhang, Sai-nan Shu, and Xing-lou Liu
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Muromegalovirus ,Inflammasomes ,Interleukin-1beta ,Congenital cytomegalovirus infection ,Biochemistry ,BALB/c ,AIM2 ,Mice ,Viral Envelope Proteins ,Genetics ,medicine ,Animals ,Cells, Cultured ,Mice, Inbred BALB C ,biology ,Caspase 1 ,Inflammasome ,Herpesviridae Infections ,biology.organism_classification ,Acquired immune system ,medicine.disease ,Blot ,DNA-Binding Proteins ,Mice, Inbred C57BL ,Disease Models, Animal ,Viral replication ,Gene Expression Regulation ,Immunology ,Macrophages, Peritoneal ,Interleukin 18 ,Female ,Spleen ,medicine.drug - Abstract
Absent in melanoma 2 (AIM2) inflammasome is a crucial link bridging the innate host defense and the subsequent adaptive immunity when activated by exogenous double stranded DNA (dsDNA). Through establishing models of disseminated murine cytomegalovirus (MCMV) infection in BALB/c and C57BL/6 mice, we evaluated dynamic expression of AIM2 inflammasome components and its relationship with pathological damage and viral replication, trying to figure out whether AIM2 inflammasome is related to the chronic mechanism of MCMV. BALB/c and C57BL/6 mice were sacrificed on day 0, 1, 3, 7, 14 and 28 post infection. Expression levels of AIM2, pro-caspase-1, caspase-1 p20, pro-IL1β and mature IL1β in primary peritoneal macrophages (PMs) and spleens were detected by Western blotting. Contents of IL18 in the serum were detected by ELISA. Pathological examinations of livers were performed, and mRNA levels of MCMV glycoprotein B (gB) in salivary glands also assessed. Results showed that expression levels of AIM2 in PMs and spleens of C57BL/6 mice increased on day 3, even continued to day 28; caspase-1 p20 and mature IL1β increased on day 7, 14 and 28; the persistently high expression of IL18 in the serum started on day 1, showing a double peak curve. As for BALB/c mice, expression of AIM2 in PMs increased on day 1 and day 7, while contents of AIM2 in spleens increased on day 1 and day 3; caspase-1 p20 and mature IL1β merely increased 7 days fter infection. Thereafter, expression levels of AIM2, caspase-1 p20, mature IL1β and IL18 were limited; the duration of AIM2 inflammasome activation in BALB/c mice was much shorter than that in C57BL/6 mice. The severer pathological damage and more viral replications in BALB/c mice further proved the deficient antiviral immunity to MCMV. In conclusion, the activation of AIM2 inflammasome in BALB/c mice was short-lived, which is quite possibly related to the chronicity of MCMV infection.
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- 2019
23. A Literature Review of Female Entrepreneurship Networking
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Lou Liu
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Entrepreneurship ,business.industry ,Frame (networking) ,Context (language use) ,Sociology ,Public relations ,business - Abstract
With the transition of female entrepreneurship from opportunistic business to achievable business, the factors and the results of female entrepreneurship networking are changing, and so, the rules of evolution of female entrepreneurship networking should be studied. How to build the frame of the theory on female entrepreneurship networking? On the bases of literature review, this paper studies four sub-subjects of female entrepreneurship networking according to local context in the country.
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- 2019
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24. Maternal Murine Cytomegalovirus Infection during Pregnancy Up-regulates the Gene Expression of Toll-like Receptor 2 and 4 in Placenta
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Yuanyuan Lu, Xing-lou Liu, Lin-Lin Zhang, Ting Xi, Yi Liao, Feng Fang, Ya-Nan Zhang, and Sai-nan Shu
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0301 basic medicine ,Placenta ,Chorioamnionitis ,Biochemistry ,Proinflammatory cytokine ,Andrology ,03 medical and health sciences ,Mice ,0302 clinical medicine ,Pregnancy ,Genetics ,medicine ,Animals ,Pregnancy Complications, Infectious ,Interleukin 6 ,reproductive and urinary physiology ,Fetus ,Mice, Inbred BALB C ,biology ,business.industry ,Interleukin-6 ,Herpesviridae Infections ,medicine.disease ,Toll-Like Receptor 2 ,Interleukin-10 ,Up-Regulation ,Toll-Like Receptor 4 ,TLR2 ,030104 developmental biology ,medicine.anatomical_structure ,embryonic structures ,biology.protein ,TLR4 ,Female ,business ,030217 neurology & neurosurgery - Abstract
Increasing evidence has revealed that maternal cytomegalovirus (CMV) infection may be associated with neurodevelopmental disorders in offspring. Potential relevance between the placental inflammation and CMV-related autism has been reported by clinical observation. Meanwhile, abnormal expression of Toll-like receptor 2 (TLR2) and TLR4 in placenta of patients with chorioamnionitis was observed in multiple studies. IL-6 and IL-10 are two important maternal inflammatory mediators involved in neurodevelopmental disorders. To investigate whether murine CMV (MCMV) infection causes alterations in placental IL-6/10 and TLR2/4 levels, we analyzed the dynamic changes in gene expression of TLR2/4 and IL-6/10 in placentas following acute MCMV infection. Mouse model of acute MCMV infection during pregnancy was created, and pre-pregnant MCMV infected, lipopolysaccharide (LPS)-treated and uninfected mice were used as controls. At E13.5, E14.5 and E18.5, placentas and fetal brains were harvested and mRNA expression levels of placental TLR2/4 and IL-6/10 were analyzed. The results showed that after acute MCMV infection, the expression levels of placental TLR2/4 and IL-6 were elevated at E13.5, accompanied by obvious placental inflammation and reduction of placenta and fetal brain weights. However, LPS 50 μg/kg could decrease the EL-6 expression at E13.5 and E14.5. This suggests that acute MCMV infection during pregnancy could up-regulate the gene expression of TLR2/4 in placental trophoblasts and activate them to produce more proinflammatory cytokine IL-6. High dose of LPS stimulation (50 μg/kg) during pregnancy can lead to down-regulation of IL-6 levels in the late stage. Imbalance of IL-6 expression in placenta might be associated with the neurodevelopmental disorders in progeny.
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- 2018
25. Application of multispectral imaging in quantitative immunohistochemistry study of breast cancer: a comparative study
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Lin-Wei Wang, Yan Li, Aiping Qu, Jia-Mei Chen, Wen-Lou Liu, Jingping Yuan, Qing-Ming Xiang, Guifang Yang, and Juan Liu
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0301 basic medicine ,Adult ,Cancer Research ,Pathology ,medicine.medical_specialty ,Quantitative immunohistochemistry ,Quantitative image analysis ,Receptor, ErbB-2 ,Multispectral image ,Optical density ,Breast Neoplasms ,Accurate segmentation ,Consistency test ,Multispectral imaging ,03 medical and health sciences ,0302 clinical medicine ,Breast cancer ,Biomarkers, Tumor ,Medicine ,Humans ,Human Epidermal Growth Factor Receptor 2 ,Aged ,business.industry ,Nuclear marker ,Estrogen Receptor alpha ,General Medicine ,Middle Aged ,medicine.disease ,Immunohistochemistry ,Molecular Imaging ,030104 developmental biology ,030220 oncology & carcinogenesis ,Keratin-5 ,Original Article ,Female ,business ,Nuclear medicine ,Invasive breast cancer - Abstract
Multispectral imaging (MSI) based on imaging and spectroscopy, as relatively novel to the field of histopathology, has been used in biomedical multidisciplinary researches. We analyzed and compared the utility of multispectral (MS) versus conventional red–green–blue (RGB) images for immunohistochemistry (IHC) staining to explore the advantages of MSI in clinical-pathological diagnosis. The MS images acquired of IHC-stained membranous marker human epidermal growth factor receptor 2 (HER2), cytoplasmic marker cytokeratin5/6 (CK5/6), and nuclear marker estrogen receptor (ER) have higher resolution, stronger contrast, and more accurate segmentation than the RGB images. The total signal optical density (OD) values for each biomarker were higher in MS images than in RGB images (all P 0.05). However, by quantifying MS images, the total signal OD values of HER2 positive expression were correlated with lymph node status and histological grades (P = 0.02 and 0.04). Additionally, the consistency test results indicated the inter-observer agreement was more robust in MS images for HER2 (inter-class correlation coefficient (ICC) = 0.95, r s = 0.94), CK5/6 (ICC = 0.90, r s = 0.88), and ER (ICC = 0.94, r s = 0.94) (all P
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- 2015
26. Expression pattern of CD11c on lung immune cells after disseminated murine cytomegalovirus infection
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Feng Fang, Heyu Huang, Sai-nan Shu, Yi Liao, Ya-Nan Zhang, Xing-lou Liu, Yuan Huang, and Yuanyuan Lu
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0301 basic medicine ,CD11chiMHC-IIhi ,Muromegalovirus ,T cell ,T-Lymphocytes ,B220 ,chemical and pharmacologic phenomena ,NK cells ,Biology ,lcsh:Infectious and parasitic diseases ,Immunophenotyping ,03 medical and health sciences ,Interleukin 21 ,Virology ,medicine ,Cytotoxic T cell ,Animals ,lcsh:RC109-216 ,IL-2 receptor ,Antigen-presenting cell ,Lung ,Mice, Inbred BALB C ,CD11c ,Research ,Histocompatibility Antigens Class II ,Dendritic cell ,Dendritic Cells ,Herpesviridae Infections ,Murine cytomegalovirus ,Acquired immune system ,Flow Cytometry ,CD8+T cells ,CD11c Antigen ,Killer Cells, Natural ,Mice, Inbred C57BL ,NKp46 ,030104 developmental biology ,Infectious Diseases ,medicine.anatomical_structure ,Blood ,Immunology ,Interleukin 12 ,B220+CD11cint NK cells ,Female ,B7-2 Antigen ,Spleen - Abstract
Background Cytomegalovirus (CMV) infection occurs frequently and is widespread globally. Numerous studies have shown that various types of immune cells play roles in mediating the response to CMV infection. CD11c, a commonly used dendritic cell (DC) marker, is expressed by other immune cells as well, such as T cells. This study analyzed the immune cells that express CD11c and monitored the expression level of their specific cell surface markers in the lung following a disseminated murine (M)CMV infection. Methods Mouse models of disseminated MCMV infection were used; uninfected and lipopolysaccharide (LPS)-treated mice were used as controls. At 1, 3 and 7 days following infection, single cell suspensions prepared from freshly digested lung tissue were stained for CD11c, CD86 and MHC II. Stained cells were analyzed using flow cytometry. Peripheral blood and single cell suspensions from spleen were sorted as well. Then these cells were subjected to analyze the CD11c expression pattern on natural killer (NK) cells and T cells. Results This assay showed that after MCMV infection, the expression of CD86 on pulmonary CD11chiMHC-IIhi cells (encompassing conventional DCs) was higher at 3 days post-infection than at 1 or 7 days post-infection, accompanied by a downregulation of MHC II. In addition, expression of CD11c was greatly increased in the MCMV infection group at 7 days post infection. This study also detected a large population of cells displaying an intermediate level of expression of CD11c (CD11cint); these cells were in the MCMV groups exclusively, and were subsequently identified as CD8+ T cells. In lung, spleen and blood, different proportions of CD11cint cells among the NK cell and T cell populations were observed between the BALB/c and C57BL/6 mice with or without MCMV infection. The expression level of NKp46 in NK cells dropped to a lower level after MCMV infection. Conclusions The findings collectively indicate that CD11cintCD8+ T cells might play a key role in anti-MCMV adaptive immune response in lungs, as well as in spleen and blood. B220+CD11cint NK cells might be a more effective type of NK cell, participating in anti-MCMV infection. The downregulation of NKp46, in particular, might be linked with the immune evasion of MCMV. Electronic supplementary material The online version of this article (doi:10.1186/s12985-017-0801-x) contains supplementary material, which is available to authorized users.
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- 2017
27. Indole Derivatives Produced by the Metagenome Genes of the Escherichia coli-Harboring Marine Sponge Discodermia calyx
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Feng-Lou Liu and Xiao-Long Yang
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0301 basic medicine ,Discodermia calyx ,Indoles ,Metabolite ,Bacillus cereus ,Pharmaceutical Science ,medicine.disease_cause ,01 natural sciences ,Article ,Analytical Chemistry ,Calyx ,03 medical and health sciences ,chemistry.chemical_compound ,antibacterial activity ,Disk Diffusion Antimicrobial Tests ,Drug Discovery ,medicine ,Escherichia coli ,Animals ,Physical and Theoretical Chemistry ,indole derivative ,Indole test ,metagenomics ,biology ,010405 organic chemistry ,Organic Chemistry ,biology.organism_classification ,0104 chemical sciences ,Anti-Bacterial Agents ,Porifera ,Sponge ,030104 developmental biology ,chemistry ,Biochemistry ,Chemistry (miscellaneous) ,Molecular Medicine ,Metagenome ,Growth inhibition ,Antibacterial activity - Abstract
Three indole derivatives, a novel benzoxazine-indole hybrid (1) and two known indole trimers (2, 3), were isolated from the metagenomic library of the marine sponge Discodermia calyx based on functional screening. Their structures were elucidated by extensive spectroscopic analysis and comparison of their NMR data to that of known compounds. The antibacterial assay indicated that only compound 2 displayed significant antibacterial activity against Bacillus cereus, with approximately 20 mm diameter growth inhibition at 10 µg/paper. HPLC analyses revealed that compound 2 is a newly induced metabolite, and the concentration of 3 was obviously enhanced in contrast to negative control, while 1 was not detected, allowing us to predict that the formation of 2 might be induced by exogenous genes derived from the sponge metagenome, whereas compound 1 could be formed through a non-enzymatic process during the isolation procedure.
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- 2017
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28. Computer-aided prognosis on breast cancer with hematoxylin and eosin histopathology images: A review
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Lei Gong, Yan Li, Wen-Lou Liu, Lin-Wei Wang, Jia-Mei Chen, Juan Liu, and Jun Xu
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medicine.medical_specialty ,Pathology ,0206 medical engineering ,Feature extraction ,H&E stain ,Breast Neoplasms ,02 engineering and technology ,03 medical and health sciences ,0302 clinical medicine ,Breast cancer ,Image Interpretation, Computer-Assisted ,medicine ,Humans ,Hematoxylin ,RC254-282 ,business.industry ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Digital pathology ,Information analysis ,General Medicine ,medicine.disease ,Prognosis ,020601 biomedical engineering ,Feature (computer vision) ,030220 oncology & carcinogenesis ,Computer-aided ,Eosine Yellowish-(YS) ,Histopathology ,Female ,Radiology ,business ,Algorithms - Abstract
With the advance of digital pathology, image analysis has begun to show its advantages in information analysis of hematoxylin and eosin histopathology images. Generally, histological features in hematoxylin and eosin images are measured to evaluate tumor grade and prognosis for breast cancer. This review summarized recent works in image analysis of hematoxylin and eosin histopathology images for breast cancer prognosis. First, prognostic factors for breast cancer based on hematoxylin and eosin histopathology images were summarized. Then, usual procedures of image analysis for breast cancer prognosis were systematically reviewed, including image acquisition, image preprocessing, image detection and segmentation, and feature extraction. Finally, the prognostic value of image features and image feature–based prognostic models was evaluated. Moreover, we discussed the issues of current analysis, and some directions for future research.
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- 2017
29. The Method Research of Environmental Noise 3D Graphic Expression Based on CityEngine
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Xi Yue Yang, Tong Zhu, and Xiang Lou Liu
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Noise ,Computer science ,Computer graphics (images) ,General Engineering ,Environmental noise ,Expression (mathematics) - Abstract
Based on CityEngine as software platform, this paper put forward 3D graphic expression of environment noise, and establishes the environmental noise monitoring model of 3D space by CSG and B-Rep hybrid algorithm. Then, according to the noise data and the legend of the color grade, we render the surface area of the 3D monitoring geometric model with the expression of grid method. Finally, the simulation shows that this method can be applied to 3D graphical expression of environmental noise.
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- 2014
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30. Random Immunization Algorithm to Energy Consumption in Optical Network
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Hong Mei Song, Hai Wei Mu, Dong Xue Wang, Shuo Cheng, Xiang Lou Liu, and Dong Yan Zhao
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Service (systems architecture) ,Mathematical optimization ,Computer science ,Node (networking) ,General Engineering ,Energy consumption ,Complex network ,Immunization (finance) ,Algorithm ,Energy (signal processing) ,Network model - Abstract
The immunization algorithm is from the theory of complex network. The algorithm is simple, highly feasible based on scale-free network model. This paper uses random immunization algorithm to solve optical network energy issues. This paper selects the service to be the operator and to save energy through node immunization. The simulation results show the algorithm can be implemented. This paper provides another possibility to energy saving on optical network.
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- 2014
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31. Effects of Long-Term Organic Amendments on Soil Organic Carbon in a Paddy Field: A Case Study on Red Soil
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Wen-ju Zhang, Yu Xichu, Xu Xiaolin, Da-ming Li, Li-jun Zhou, Ye Huicai, Kai-lou Liu, Qing-hai Huang, Ying-hua Duan, Wang Sailian, and Hui-wen Hu
- Subjects
long-term field experiment ,Total organic carbon ,Ecology ,Agriculture (General) ,Plant Science ,Soil carbon ,paddy soil derived from red earth ,engineering.material ,Biochemistry ,S1-972 ,soil organic carbon ,Green manure ,organic amendments ,Food Animals ,Agronomy ,engineering ,Paddy field ,Environmental science ,Animal Science and Zoology ,Fertilizer ,Cropping system ,Red soil ,Agronomy and Crop Science ,Mulch ,Food Science - Abstract
Soil organic carbon (SOC) is one of the main carbon reservoirs in the terrestrial ecosystem. It is important to study SOC dynamics and effects of organic carbon amendments in paddy fields because of their vest expansion in south China. A study was carried out to evaluate the relationship between the SOC content and organic carbon input under various organic amendments at a long-term fertilization experiment that was established on a red soil under a double rice cropping system in 1981. The treatments included non-fertilization (CK), nitrogen-phosphorus-potassium fertilization in early rice only (NPK), green manure (Astragalus sinicus L.) in early rice only (OM1), high rate of green manure in early rice only (OM2), combined green manure in early rice and farmyard manure in late rice (OM3), combined green manure in early rice, farmyard manure in late rice and rice straw mulching in winter (OM4), combined green manure in early rice and rice straw mulching in winter (OM5). Our data showed that the SOC content was the highest under OM3 and OM4, followed by OM1, OM2 and OM5, then NPK fertilization, and the lowest under non-fertilization. However, our analyses in SOC stock indicated a significant difference between OM3 (33.9 t ha−1) and OM4 (31.8 t ha−1), but no difference between NPK fertilization (27 t ha−1) and non-fertilization (28.1 t ha−1). There was a significant linear increase in SOC over time for all treatments, and the slop of linear equation was greater in organic manure treatments (0.276–0.344 g kg−1 yr−1) than in chemical fertilizer (0.216 g kg−1 yr−1) and no fertilizer (0.127 g kg−1 yr−1).
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- 2014
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32. An Express Retrieval Method of Face Based on Semantic Features
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Hai Wei Mu, Ming Zhang, Xiang Lou Liu, and Dong Yan Zhao
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Matching (statistics) ,Computer science ,business.industry ,General Engineering ,Pattern recognition ,Automatic image annotation ,Robustness (computer science) ,Face (geometry) ,Pattern recognition (psychology) ,Digital image processing ,Computer vision ,Visual Word ,Artificial intelligence ,business ,Image retrieval - Abstract
The paper uses digital image processing technology, technology of face pattern recognition and traditional database retrieval technology, integrate image retrieval technology based on version and content, and avoid the complexity of matching image process. The experiments with 200 human samples, correctly retrieved for 155 people, exactly matched to 125. The recognition rate of the system is 75.55%, the average time of search is less than 0.1s. Experiments indicate this method has strong robustness. The semantic face image retrieval system using this method has the characteristics of fast, efficient, practical.
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- 2013
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33. Optical Network Energy Algorithm Based on the Genetic Algorithm
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Xiang Lou Liu, Dong Yan Zhao, Dong Xue Wang, Hai Wei Mu, and Ming Zhang
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Engineering ,Mathematical optimization ,Meta-optimization ,business.industry ,Cultural algorithm ,Population-based incremental learning ,Node (networking) ,General Engineering ,Energy conservation ,Operator (computer programming) ,Genetic algorithm ,business ,Algorithm ,Energy (signal processing) - Abstract
The genetic algorithm is from the law of the biological genetic evolution. The algorithm is simple, highly feasible. This paper uses a genetic algorithm for optical network energy issues. Select the business volume to be the operator and to save energy through node sleeping. The simulation confirms the algorithm can be implemented. This paper provides another possibility on optical networks energy conservation.
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- 2013
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34. Is IL-17 an accomplice contributing to salivary gland damage during CMV infection?
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Xing-lou Liu, Ge Li, Xu-fang Li, Ling-ling Liu, Wen-qing Qin, Sai-nan Shu, and Feng Fang
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Virus quantification ,Pathology ,medicine.medical_specialty ,medicine.diagnostic_test ,Salivary gland ,H&E stain ,Spleen ,Biology ,Flow cytometry ,Reverse transcription polymerase chain reaction ,Titer ,medicine.anatomical_structure ,Virology ,medicine ,Interleukin 17 - Abstract
Aim: This study aimed to explore the potential role of IL-17 in the pathological damage to the salivary gland during CMV infection. Materials & methods: For all studies, 4-week-old female BALB/c mice were used. Mouse embryo fibroblast cells were isolated from embryos of pregnant mice. The Smith murine CMV (MCMV) strain was propagated and obtained from homogenates of the salivary glands. BALB/c mice were randomly divided into two groups. Mice in one group were infected with Smith MCMV to establish disseminated infection; mice in the other group were controls. Four mice of each group were randomly chosen to be harvested on days 3, 7, 14 and 28. Viral titers in salivary gland tissues were determined using a standard plaque assay; IL-17+ T cells in the spleen were analyzed by flow cytometry; the expressions of IL-17 and IL-17 receptor (IL-17R) mRNA was measured by reverse transcription PCR; and the pathology of the salivary glands in infected mice were assessed by hematoxylin and eosin staining. Results: The viral titers in salivary gland tissues, which were much higher than those of other organs, elevated on day 7 and peaked on day 14, then gradually declined on day 28. The percentages of CD4+IL-17+ T cells were increased in MCMV-infected mice compared with controls, with the main increase of CD4+IL-17+ T cells being Th17 cells (p < 0.05). In salivary gland tissues, the expression of IL-17 and IL-17R mRNA increased significantly and achieved the highest level on day 14, which was significantly higher than that of the controls (p < 0.05). Compared with controls, serious inflammatory cellular infiltrates in the salivary glands were present on day 7 after MCMV infection, and on day 14, many of the cellular infiltrate became larger and coalesced with neighboring foci. We found that IL-17 and IL-17R were enriched in the salivary glands when the tissues were mainly injured. Conclusion: The results illustrated that the inflammatory factors, IL-17 and IL-17R, possibly contributed to the process of viral infection and played a part in inducing pathological damage of the salivary gland.
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- 2013
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35. Interaction between HCMV pUL83 and human AIM2 disrupts the activation of the AIM2 inflammasome
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Yuanyuan Lu, Feng Fang, Heyu Huang, Yi Liao, Ling-ling Liu, Xing-lou Liu, Di Ma, and Yuan Huang
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0301 basic medicine ,Human cytomegalovirus ,Inflammasomes ,viruses ,Cytomegalovirus ,AIM2 inflammasome ,Biology ,law.invention ,Cell Line ,Viral Matrix Proteins ,03 medical and health sciences ,AIM2 ,Immune system ,law ,Virology ,Two-Hybrid System Techniques ,Protein Interaction Mapping ,medicine ,Humans ,Immunoprecipitation ,pUL83 ,HCMV ,030102 biochemistry & molecular biology ,IFI16 ,Immune evasion ,Research ,HEK 293 cells ,Inflammasome ,Transfection ,medicine.disease ,Phosphoproteins ,Recombinant Proteins ,DNA-Binding Proteins ,030104 developmental biology ,Infectious Diseases ,Host-Pathogen Interactions ,Luminescent Measurements ,Recombinant DNA ,medicine.drug ,Plasmids - Abstract
Background AIM2, a cytosolic DNA sensor, plays an important role during infection caused by pathogens with double-stranded DNA; however, its role in human cytomegalovirus (HCMV) infection remains unclear. Previously, we showed an increase in AIM2 protein levels during the early stage of HCMV infection and a decrease 24 h post infection. Because HCMV has developed a variety of strategies to evade host immunity, we speculated that this decline might be attributed to a viral immune escape mechanism. The tegument protein pUL83 is an important immune evasion protein and several studies have reported that pUL83 binds to specific cellular proteins, such as AIM2-like receptor IFI16, to affect their functions. To determine whether pUL83 contributes to the variation in AIM2 levels during HCMV infection, we investigated the pUL83/AIM2 interaction and its impact on the AIM2 inflammasome activation. Methods We constructed plasmids expressing recombinant pUL83 and AIM2 proteins for two-hybrid and chemiluminescence assays. Using co-immunoprecipitation and immunofluorescent co-localization, we confirmed the interaction of pUL83/AIM2 in THP-1–derived macrophages infected with HCMV AD169 strain. Furthermore, by investigating the expression and cleavage of inflammasome-associated proteins in recombinant HEK293T cells expressing AIM2, apoptosis-associated speck-like protein (ASC), pro-caspase-1 and pro-IL-1β, we evaluated the effect of pUL83 on the AIM2 inflammasome. Results An interaction between pUL83 and AIM2 was detected in macrophages infected with HCMV as well as in transfected HEK293T cells. Moreover, transfection of the pUL83 expression vector into recombinant HEK293T cells stimulated by poly(dA:dT) resulted in reduced expression and activation of AIM2 inflammasome-associated proteins, compared with the absence of pUL83. Conclusions Our data indicate that pUL83 interacts with AIM2 in the cytoplasm during the early stages of HCMV infection. The pUL83/AIM2 interaction deregulates the activation of AIM2 inflammasome. These findings reveal a new strategy of immune evasion developed by HCMV, which may facilitate latent infection.
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- 2017
36. Allium sativum-derived allitridin inhibits treg amplification in cytomegalovirus infection
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Yong-jian Huang, Fei Huang, Xing-lou Liu, Feng Fang, Huanji Cheng, Ya-nan Li, and Sai-nan Shu
- Subjects
Muromegalovirus ,Regulatory T cell ,T cell ,medicine.medical_treatment ,chemical and pharmacologic phenomena ,Sulfides ,Biology ,T-Lymphocytes, Regulatory ,Placebos ,Mice ,Immune system ,T-Lymphocyte Subsets ,In vivo ,Virology ,medicine ,Animals ,Immunologic Factors ,IL-2 receptor ,Garlic ,Mice, Inbred BALB C ,Gene Expression Profiling ,FOXP3 ,Forkhead Transcription Factors ,Immunosuppression ,Herpesviridae Infections ,Viral Load ,Allyl Compounds ,Disease Models, Animal ,Infectious Diseases ,medicine.anatomical_structure ,Immunology ,Cytokines ,Female ,Viral load - Abstract
This study investigated the effects of allitridin compound on murine cytomegalovirus (MCMV)-induced regulatory T cell (Treg; CD4(+) CD25(+) Foxp3(+) ) amplification in vivo and in vitro. One hundred twenty MCMV-infected mice were allocated at random into two groups for treatment with allitridin or placebo. Another 120 mock-infected mice were randomly allocated as controls for the allitridin treatment and placebo treatment groups. The mice were euthanized at various time points after infection (out to 120 days) to evaluate the effects of treatment on Treg presence and function, as well as MCMV infective load. Co-culture with mouse embryo fibroblasts (MEF) and MCMV was performed to evaluate allitridin-mediated Treg and anti-CMV effects. The maximum tolerance concentration (MTC) of allitridin was used to treat cells for 3 days. Changes in Foxp3 mRNA and protein levels, percentages of T cell subsets, and Treg-related cytokines (IL-10 and TGF-β) were measured. Allitridin treatment did not influence Foxp3 expression and Treg proportion in uninfected mice, but did down-regulate each in infected mice during the chronic infection period. Additionally, allitridin treatment reduced the MCMV load in salivary glands. MTC allitridin treatment of co-cultures partially blocked MCMV induction of Foxp3 mRNA and protein expression. In vitro treatment with allitridin also increased significantly the percentages of Tc1, Tc2, and Th1, reduced the secreted levels of IL-10 and TGF-β1, and significantly suppressed viral loads. In conclusion, allitridin can promote MCMV-induced Treg expansion and Treg-mediated anti-MCMV immunosuppression. Therefore, allitridin may be useful as a therapeutic agent to enhance the specific cellular immune responses against CMV.
- Published
- 2013
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37. Optimal structural analysis with associated passive heat removal for AP1000 shield building
- Author
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Chung-Han Tsai, Yitung Chen, Ming-Lou Liu, Tzu-Chen Hung, and Duen-Sheng Lee
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Engineering ,Buoyancy ,Passive cooling ,business.industry ,Energy Engineering and Power Technology ,Thermal power station ,Structural engineering ,engineering.material ,Industrial and Manufacturing Engineering ,Seismic analysis ,Stress (mechanics) ,Shield ,Heat transfer ,business ,Size effect on structural strength - Abstract
The shield building of AP1000 was designed to protect the steel containment vessel (CV) of nuclear power plants. When the reactor is shutdown, the tank mounted above the shield building sprays water, and the intake of ambient air cools down the temperature of CV through buoyancy driven circulation. The result of heat transfer analysis indicates that the location of air intake at lower altitude is more effective than that in the original design. However, pursuing superior heat transfer may cause a conflict with the structural strength, particularly under the threat of an earthquake. Therefore, this study identified the optimal design for stress analysis to improve passive cooling. The results of structural analyses indicated that the maximal stresses developed under various water levels were in the acceptable range of yield stress limits for concrete. The water level does not pose considerable danger to the structure. In addition, the simulation result also indicated that an optimal parametric design for air intake must be implemented around the middle of the shield building, with 16 circular or oval shaped air intake.
- Published
- 2013
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38. Human cytomegalovirus triggers the assembly of AIM2 inflammasome in THP-1-derived macrophages
- Author
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Xing-lou Liu, Di Ma, Yi Liao, Yuan Huang, Feng Fang, Heyu Huang, Ling-ling Liu, Wen-qing Qin, and Yuanyuan Lu
- Subjects
0301 basic medicine ,Human cytomegalovirus ,Inflammasomes ,viruses ,030106 microbiology ,Interleukin-1beta ,Cytomegalovirus ,DNA-Directed DNA Polymerase ,Biology ,Virus ,Viral Matrix Proteins ,03 medical and health sciences ,AIM2 ,Viral Proteins ,Immune system ,Viral life cycle ,Transcription (biology) ,Virology ,medicine ,Humans ,RNA, Small Interfering ,Innate immune system ,Cell Death ,Macrophages ,Caspase 1 ,Inflammasome ,medicine.disease ,Phosphoproteins ,Immunity, Innate ,DNA-Binding Proteins ,030104 developmental biology ,Infectious Diseases ,medicine.drug - Abstract
Absent in melanoma 2 (AIM2) inflammasome is a multiprotein complex which plays a pivotal role in the host immune response to multiple pathogens. The role of AIM2 in human cytomegalovirus (HCMV) infection is poorly studied. Thus, using a small inference RNA (siRNA) approach and THP-1 derived macrophage cells infected with HCMV AD169 strain, we investigated the impact of HCMV infection on AIM2-mediated molecular events. Compared to wild-type cells, AIM2-defiecient macrophages showed a limited ability to activate caspase-1, process IL-1β, and induce cell death. In addition, AIM2-defiecient cells were unable to efficiently control HCMV infection, as the transcription of virus DNA polymerase gene UL54 and major tegument protein gene UL83 were higher compared to wild-type cells. In conclusion, HCMV infection induces an AIM2 inflammasome response, which negatively influences viral life cycle. This article is protected by copyright. All rights reserved
- Published
- 2016
39. Overexpression of TMPRSS4 promotes tumor proliferation and aggressiveness in breast cancer
- Author
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Xu Chen, Ya-Wen Wang, Xiaomei Li, Ran-Ran Ma, Hui Zhang, Wen-Lou Liu, Xiang-Yu Guo, Duan-Bo Shi, Peng Gao, Feng Hou, Hai-Ting Liu, and Li Ming
- Subjects
0301 basic medicine ,Adult ,Epithelial-Mesenchymal Transition ,proliferation ,serine protease ,Cell ,Vimentin ,Breast Neoplasms ,medicine.disease_cause ,transmembrane protease serine 4 ,Gene Expression Regulation, Enzymologic ,03 medical and health sciences ,0302 clinical medicine ,breast cancer ,Cell Movement ,Genetics ,medicine ,Humans ,Neoplasm Invasiveness ,Epithelial–mesenchymal transition ,Cell Proliferation ,Oncogene ,biology ,Cell growth ,Serine Endopeptidases ,Cancer ,Membrane Proteins ,General Medicine ,Articles ,Cell cycle ,Middle Aged ,medicine.disease ,invasion ,Neoplasm Proteins ,Gene Expression Regulation, Neoplastic ,030104 developmental biology ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,biology.protein ,Cancer research ,MCF-7 Cells ,Female ,Carcinogenesis - Abstract
Transmembrane protease serine 4 (TMPRSS4) is a novel type II transmembrane serine protease that is overexpressed in various types of human cancers and has an important function in cancer progression. However, there is a paucity of data available regarding the biological effects of TMPRSS4 on breast cancer (BC) cells and the underlying mechanisms. In this study, expression of TMPRSS4 in BC tissues was detected by immunohistochemistry. The relationship between TMPRSS4 expression and clinicopathological characteristics as well as prognosis was evaluated. The effects of TMPRSS4 on cell proliferation, migration and invasion were investigated in BC cell lines in vitro. Additionally, RT-qPCR and western blot analysis were used to determine the expressions of epithelial-mesenchymal transition (EMT) biomarkers and TMPRSS4 in BC cell lines. We found that TMPRSS4 was overexpressed in BC tissues and its expression level was closely correlated with tumor size, histological grade, lymph node metastasis, clinical stage as well as poor survival (all P
- Published
- 2016
40. Evaluation on Tangshan City Science and Technology Innovation System
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Hong Rui Zhu, Ya Lou Liu, and Guang Feng Wang
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Engineering ,Engineering management ,Countermeasure ,business.industry ,Innovation theory ,General Medicine ,Innovation system ,business ,Science, technology and society ,Civil engineering - Abstract
Based on the Tangshan scientific innovation system construction's realistic situation, profits from the domestic and foreign region innovation theory, analyzed Tangshan scientific innovation system current construction environment and the resources characteristic, has constructed the evaluating indicator system, has carried on the empirical analysis based on the indicator system using the principal components law to the Tangshan scientific innovation system construction condition, proposed in the Tangshan scientific innovation system construction exists question as well as optimized countermeasure suggestion..
- Published
- 2012
- Full Text
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41. Scale removal oxidation behavior of metal in supercritical water modeled by cellular automaton
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Yitung Chen, Tsung-Kuang Yeh, Tzu-Chen Hung, Kuan Che Lan, Ming-Lou Liu, and Ge-Ping Yu
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Oxide minerals ,Materials science ,Metal ions in aqueous solution ,Spinel ,Oxide ,Energy Engineering and Power Technology ,engineering.material ,Inconel 625 ,Chemical reaction ,Supercritical fluid ,Corrosion ,chemistry.chemical_compound ,Nuclear Energy and Engineering ,Chemical engineering ,chemistry ,engineering ,Safety, Risk, Reliability and Quality ,Waste Management and Disposal - Abstract
Corrosion and oxidation of structure material in supercritical water are specific and an important issue in the nuclear industry. A scale removal cellular automaton model was proposed to investigate the development of a continuous oxide layer of Inconel 625 in supercritical water at 24.8 MPa and 600 °C. This study presented influence of the reaction behavior of oxidation, scale removal effect, and transport ratio of oxygen and metal ions on the corrosion and oxidation process with different conditions. The formation of the spinel is simulated at mesoscopic level. The developed model is also mapped with the laboratory experimental data from a supercritical water loop.
- Published
- 2011
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42. Effects of allitridin on acute and chronic mouse cytomegalovirus infection
- Author
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Hai-xia Ge, Xing-lou Liu, Hui Wang, Ya-nan Li, Sai-nan Shu, and Feng Fang
- Subjects
Muromegalovirus ,medicine.medical_specialty ,viruses ,Congenital cytomegalovirus infection ,Cytomegalovirus ,Sulfides ,Biology ,Antiviral Agents ,Salivary Glands ,Mice ,Medical microbiology ,stomatognathic system ,In vivo ,Virology ,medicine ,Animals ,Humans ,Mice, Inbred BALB C ,virus diseases ,RNA ,Herpesviridae Infections ,General Medicine ,Viral Load ,medicine.disease ,Allyl Compounds ,Cytomegalovirus infection ,Disease Models, Animal ,Titer ,Chronic infection ,Acute Disease ,Chronic Disease ,Cytomegalovirus Infections ,Immunology ,Female ,Viral load - Abstract
This study investigated the effects of allitridin on acute and chronic mouse cytomegalovirus (MCMV) infections in vivo. The results demonstrated that allitridin reduced the titers of MCMV in salivary glands, and reductions in viral loads were confirmed by determining viral DNA and RNA levels in susceptible organs during the acute infection phase. Although allitridin did not eliminate MCMV, treatment reduced viral levels and facilitated healing of pathologic lesions in organs, particularly during the chronic infection phase. The results presented in this report suggest that allitridin could act as an effective agent against MCMV infections in vivo.
- Published
- 2011
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43. CD4+CD25+ regulatory T cells suppress the immune responses of mouse embryo fibroblasts to murine cytomegalovirus infection
- Author
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Yong-jian Huang, Hua Zhou, Xing-lou Liu, Fei Huang, Feng Fang, and Ya-nan Li
- Subjects
Muromegalovirus ,medicine.drug_class ,CD3 ,Immunology ,chemical and pharmacologic phenomena ,Monoclonal antibody ,T-Lymphocytes, Regulatory ,Mice ,Immune system ,Antigens, CD ,T-Lymphocyte Subsets ,Immune Tolerance ,medicine ,Animals ,Immunology and Allergy ,IL-2 receptor ,Antibodies, Blocking ,Cells, Cultured ,Immunity, Cellular ,Mice, Inbred BALB C ,biology ,Effector ,FOXP3 ,Forkhead Transcription Factors ,hemic and immune systems ,Herpesviridae Infections ,Fibroblasts ,Viral Load ,Coculture Techniques ,Interleukin 10 ,biology.protein ,Cytokines ,Female ,CD8 - Abstract
Cytomegaloviruses (CMVs) cause common viral infectious diseases and are difficult for the host immune system to eliminate, which leads to persistent or chronic infection. To investigate the T cell immune response stimulated by murine cytomegalovirus (MCMV) infection and the role of CD4(+)CD25(+)Foxp3(+) T regulatory cells (Tregs) in this process, T cells containing various proportions of Tregs were co-cultured with MCMV-infected mouse embryo fibroblasts (MEFs). MCMV infection stimulated proliferation of effector T cells as well as differentiation to Tregs, which consequently increased the expression of TGF-beta and IL-10. The proliferation of Tc1 (CD3(+)CD8(+)IFN-gamma(+)), Th1 (CD3(+)CD4(+)IFN-gamma(+)), and Tc2 (CD3(+)CD8(+)IL-4(+)) subsets was significantly suppressed with an increased proportion of Tregs in the co-culture system. Treg-depleted T cells inhibited viral load when co-cultured with MCMV-infected MEFs, however, this inhibitory effect was diminished when an increased proportion of Tregs was introduced. The suppressing effects of Tregs on effector T cells were attenuated by the addition of monoclonal antibody to TGF-beta, but not the one to IL-10, suggesting that TGF-beta is a major messenger involved in the immune suppressing effect of Tregs.
- Published
- 2010
- Full Text
- View/download PDF
44. Quantum dots-based double imaging combined with organic dye imaging to establish an automatic computerized method for cancer Ki67 measurement
- Author
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Yan Li, Lin-Wei Wang, Wen-Lou Liu, Jingping Yuan, Aiping Qu, Han Wu, Juan Liu, and Jia-Mei Chen
- Subjects
0301 basic medicine ,Pathology ,medicine.medical_specialty ,Breast Neoplasms ,Image processing ,Sensitivity and Specificity ,Signal ,Article ,Ki67 Measurement ,03 medical and health sciences ,0302 clinical medicine ,Breast cancer ,Quantum Dots ,Image Processing, Computer-Assisted ,Humans ,Medicine ,Coloring Agents ,Neoplasm Staging ,Multidisciplinary ,Staining and Labeling ,business.industry ,Optical Imaging ,Cancer ,medicine.disease ,Ki-67 Antigen ,030104 developmental biology ,Quantum dot ,030220 oncology & carcinogenesis ,Organic dye ,Ki67 index ,Keratins ,Female ,business ,Biomedical engineering - Abstract
As a widely used proliferative marker, Ki67 has important impacts on cancer prognosis, especially for breast cancer (BC). However, variations in analytical practice make it difficult for pathologists to manually measure Ki67 index. This study is to establish quantum dots (QDs)-based double imaging of nuclear Ki67 as red signal by QDs-655, cytoplasmic cytokeratin (CK) as yellow signal by QDs-585 and organic dye imaging of cell nucleus as blue signal by 4′,6-diamidino-2-phenylindole (DAPI) and to develop a computer-aided automatic method for Ki67 index measurement. The newly developed automatic computerized Ki67 measurement could efficiently recognize and count Ki67-positive cancer cell nuclei with red signals and cancer cell nuclei with blue signals within cancer cell cytoplasmic with yellow signals. Comparisons of computerized Ki67 index, visual Ki67 index and marked Ki67 index for 30 patients of 90 images with Ki67 ≤ 10% (low grade), 10%
- Published
- 2016
- Full Text
- View/download PDF
45. The role, mechanism and potentially novel biomarker of microRNA-17-92 cluster in macrosomia
- Author
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Xinru Wang, Lou Liu, Daozhen Chen, Jie Wu, Yali Hu, Wei Wu, Liping Chen, Hua Jiang, Qiuqin Tang, Hongjuan Ding, Yankai Xia, Hao Gu, and Jing Li
- Subjects
Ribonuclease III ,medicine.medical_specialty ,endocrine system diseases ,Cell Cycle Pathway ,Placenta ,Gene Expression ,Apoptosis ,Bioinformatics ,Retinoblastoma Protein ,Article ,Cell Line ,Fetal Macrosomia ,DEAD-box RNA Helicases ,Pregnancy ,RNA interference ,Internal medicine ,microRNA ,Fetal macrosomia ,medicine ,Birth Weight ,Humans ,Drosha ,Cell Proliferation ,Smad4 Protein ,Multidisciplinary ,biology ,Cell growth ,Infant, Newborn ,medicine.disease ,female genital diseases and pregnancy complications ,Up-Regulation ,MicroRNAs ,Endocrinology ,ROC Curve ,Case-Control Studies ,Multigene Family ,biology.protein ,Biomarker (medicine) ,Female ,RNA Interference ,Biomarkers ,Dicer - Abstract
Macrosomia is one of the most common perinatal complications of pregnancy and has life-long health implications for the infant. microRNAs (miRNAs) have been identified to regulate placental development, yet the role of miRNAs in macrosomia remains poorly understood. Here we investigated the role of miR-17-92 cluster in macrosomia. The expression levels of five miRNAs in miR-17-92 cluster were significantly elevated in placentas of macrosomia, which may due to the up-regulation of miRNA-processing enzyme Drosha and Dicer. Cell cycle pathway was identified to be the most relevant pathways regulated by miR-17-92 cluster miRNAs. Importantly, miR-17-92 cluster increased proliferation, attenuated cell apoptosis and accelerated cells entering S phase by targeting SMAD4 and RB1 in HTR8/SVneo cells. Furthermore, we found that expression of miR-17-92 cluster in serum had a high diagnostic sensitivity and specificity for macrosomia (AUC: 80.53%; sensitivity: 82.61%; specificity: 69.57%). Our results suggested that miR-17-92 cluster contribute to macrosomia development by targeting regulators of cell cycle pathway. Our findings not only provide a novel insight into the molecular mechanisms of macrosomia, but also the clinical value of miR-17-92 cluster as a predictive biomarker for macrosomia.
- Published
- 2015
- Full Text
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46. Temozolomide for Treating Malignant Melanoma
- Author
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Rong-Hua, Li, Xiao-Yang, Hou, Chun-Sheng, Yang, Wen-Lou, Liu, Jian-Qin, Tang, Yan-Qun, Liu, and Guan, Jiang
- Subjects
Dacarbazine ,Skin Neoplasms ,Treatment Outcome ,Brain Neoplasms ,Quality of Life ,Temozolomide ,Humans ,Antineoplastic Agents, Alkylating ,Melanoma - Abstract
Melanoma is one of the most malignant forms of skin cancer; with a rapidly increasing prevalence. Early-stage melanoma is curable, but advanced metastatic melanoma is almost always fatal, and patients with such advanced disease have short median survival. Surgery and radiotherapy play a limited role in the treatment of metastatic melanoma. Rather, chemotherapy remains the mainstay of treatment, although other approaches, including biotherapy and gene therapy, have been attempted. The authors hereby, evaluated the use of temozolomide (TMZ) for treating metastatic melanoma compared to dacarbazine (DTIC), the effectiveness of TMZ for treating brain metastases, as well as TMZ resistance and how the efficacy of TMZ in malignant melanoma can be increased. Two chemotherapeutic regimens are commonly used for palliative treatment of malignant melanoma: intravenous administration of DTIC and oral administration of the alkylating agent temozolomide (TMZ). Compared to DTIC, TMZ is very well tolerated and has an advantage in terms of improving the quality of life of patients with metastatic melanoma. While the prognosis is currently unpromising, chemotherapy plays a palliative role for patients with metastatic melanoma. The toxicity of treatment regimens based on DTIC and TMZ do not differ significantly, although TMZ is costlier. These findings provide a reference for future researchers via a comprehensive analysis of the relevant literature.
- Published
- 2014
47. Performance Analysis of Flexible Pavement
- Author
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Yan-Chang Chen and Ming-Lou Liu
- Subjects
Engineering ,Pavement engineering ,business.industry ,business ,Civil engineering - Published
- 2014
- Full Text
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48. Analysis of the Mechanic Behavior and Rutting of Asphalt Concrete Using a Sand Model
- Author
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Ming-Lou Liu
- Subjects
Stress path ,Rut ,business.industry ,Applied Mathematics ,Mechanical Engineering ,Plasticity ,Condensed Matter Physics ,Plasticity theory ,Asphalt concrete ,Important research ,Geotechnical engineering ,business ,Nonlinear elasticity ,Geology - Abstract
The stress-strain relationship of the sand and asphalt concrete materials is one of the most important research subjects in the past, and many conctitutive laws for these materials have been proposed in the last two decades. In this study, the Vermeer plasticity model is modified and used to predict the behavior of the sand and asphalt concrete materials under different stress path conditions. The results show that the predictions and test results agree well under different stress path conditions. However, the orignal Vermeer model can not predict the stress-strain behavior of the asphalt concrete. Finally, the modified Vermeer plasticity model is incorporated with the pavement rutting model to predict the rut depth of pavement structure under traffic loadings.
- Published
- 1999
- Full Text
- View/download PDF
49. Cutaneous polyarteritis nodosa
- Author
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Guan, Jiang, Wen-Lou, Liu, Yan-Qun, Liu, and Zhi-Ping, Wei
- Subjects
Male ,Subcutaneous Tissue ,Treatment Outcome ,Adolescent ,Lower Extremity ,Anti-Inflammatory Agents ,Humans ,Prednisone ,Polyarteritis Nodosa ,Skin - Published
- 2013
50. Identification of proteins that interact with murine cytomegalovirus early protein M112-113 in brain
- Author
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Hui, Wang, Xing-Lou, Liu, Sai-Nan, Shu, Yong-Jian, Huang, and Feng, Fang
- Subjects
Mice ,Muromegalovirus ,Viral Proteins ,Two-Hybrid System Techniques ,Animals ,Brain ,Humans ,Immunoprecipitation ,Cell Line ,Plasmids ,Protein Binding - Abstract
Murine cytomegalovirus (MCMV) early protein M112-113 is involved in viral DNA replication and believed to play a crucial role in the viral pathogenesis. To investigate the biological function of M112-113 protein in the pathogenesis of the brain disorders caused by cytomegalovirus (CMV), a screening for proteins interacting with M112-113 was performed by a yeast two-hybrid system.Bait plasmid pGBKT7-M112-113 was constructed and transformed into AH109 yeast. After confirmation of the expression of MCMV M112-113 in yeast, the bait yeast was mated with a prey yeast containing mouse brain cDNA library plasmid to screen the proteins interacting with M112-113. Interactions between M112-113 and the obtained proteins were verified by yeast two-hybrid assay and chemiluminescent co-immunoprecipitaion.Two proteins interacting with M112-113 were identified, including metastasis-associated 1 (MTA1) and zinc finger, CCHC domain containing 18 (ZCCHC18). M112-113 protein could interact with MTA1 or ZCCHC18 in yeast and mammalian cells.The interactions of M112-113 with MTA1 or ZCCHC18 may be related to the pathogenesis of MCMV-associated disease in central nervous system.
- Published
- 2012
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