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Xiong Y, Liu J, Yu J, Chen D, Li T, Zhou F, Wu T, Liu X, Du Y. OPEs-ID: A software for non-targeted screening of organophosphate esters based on liquid chromatography-high-resolution mass spectrometry. J Hazard Mater 2024; 465:133275. [PMID: 38157816 DOI: 10.1016/j.jhazmat.2023.133275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/05/2023] [Accepted: 12/13/2023] [Indexed: 01/03/2024]
Abstract
Organophosphate esters (OPEs) are widely used as flame retardants and plasticizers, presenting a potential threat to the environment and human health. To date, no automatic software exists for the nontargeted screening of OPEs. In this study, OPEs-ID, a user-friendly software, was developed for the identification of OPEs using liquid chromatography-high-resolution mass spectrometry. The main workflow of OPEs-ID included fragments-dependent precursor ion screening, elemental composition determination, extracted ion chromatograms (EIC) comparison, and molecular structure identification via MetFrag strategy. A mixture of 17 OPE standards was identified with an identification rate of 100% by OPEs-ID. OPEs-ID demonstrated a rate of 94.1% for correctly ranking within the top 1 candidate in a local database (41.2% in PubChem) for the 17 OPE standards, which remarkably improved the identification when compared to conventional in silico fragmentation algorithms. Using a pooled airborne fine particle sample (PM2.5), OPEs-ID could automatically retrieve 22 valid molecules with structure candidates. The detection frequencies of 9 newly identified OPEs were between 13% and 100% in the 32 PM2.5 samples. Their semi-quantification concentrations were comparable to those of some traditional OPEs. Overall, OPEs-ID offers a powerful tool to significantly enrich our understanding of the OPEs present in the environment.
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Affiliation(s)
- Yinran Xiong
- School of Chemistry & Molecular Engineering and Research Centre of Analysis and Test, East China University of Science and Technology, Shanghai 200237, China; Chongqing Municipal Key Laboratory of Scientific Utilization of Tobacco Resources, Chongqing 400060, China
| | - Jinyue Liu
- School of Chemistry & Molecular Engineering and Research Centre of Analysis and Test, East China University of Science and Technology, Shanghai 200237, China
| | - Jing Yu
- School of Chemistry & Molecular Engineering and Research Centre of Analysis and Test, East China University of Science and Technology, Shanghai 200237, China
| | - Da Chen
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Tiantian Li
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - Fengli Zhou
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Ting Wu
- School of Chemistry & Molecular Engineering and Research Centre of Analysis and Test, East China University of Science and Technology, Shanghai 200237, China.
| | - Xiaotu Liu
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China.
| | - Yiping Du
- School of Chemistry & Molecular Engineering and Research Centre of Analysis and Test, East China University of Science and Technology, Shanghai 200237, China.
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Zhang H, Zhou F, Liu X, Huang J. Clinical application of metagenomic next-generation sequencing in patients with different organ system infection: A retrospective observational study. Medicine (Baltimore) 2024; 103:e36745. [PMID: 38277518 PMCID: PMC10817116 DOI: 10.1097/md.0000000000036745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 11/30/2023] [Indexed: 01/28/2024] Open
Abstract
Microbiological identification is essential for appropriate treatment, but conventional methods are time-consuming and have a low sensitivity. In contrast, metagenomic next-generation sequencing (mNGS) is a culture-free and hypothesis-free technique that can detect a wide array of potential pathogens. This study aimed to reveal the overall diagnostic value of mNGS for infectious diseases of different organ systems and compare the sensitivity and specificity of mNGS with conventional methods. In a retrospective cohort study, 94 patients with mNGS results were enrolled, and clinical data were recorded and analyzed to compare the positive rate of mNGS with traditional methods including as smears, serological tests, and traditional PCR, etc. In this study, mNGS and culture were both positive in 12.77% cases and were both negative in 23.4% cases. There were positive results in 56 cases (54.26%) only by mNGS and 4 cases (4.26%) were positive only by culture. There were significant differences in sensitivity of pathogen detection between of ID and NID group for mNGS (χ2 = 10.461, P = .001)and conventional methods(χ2 = 7.963, P = .005). The positive predictive values and negative predictive values of diagnosing infectious disease by mNGS were 94.12% and 30.77%, respectively. mNGS increased the sensitivity rate by approximately 53.66% compared with that of culture (78.05% vs24.39%; χ2 = 47.248, P < .001) and decreased the specificity rate by 12.5% compared with that of culture (66.67% vs 100.0%; χ2 = 4.8, P = .028). mNGS can identify emerging or rare pathogen and further guide treatment regimens. mNGS has advantages in identifying overall pathogens and bacteria, however, there was no obvious advantage in identifying fungi, virus and tuberculosis. mNGS has higher specificity than conventional methods in identifying pathogens and advantages in detecting emerging or rare pathogens.
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Affiliation(s)
- Haiyan Zhang
- Department of General Practice, The Third Affiliated Hospital of Sun Yat-Sen University Lingnan Hospital, Guangzhou, Guangdong Province, People’s Republic of China
| | - Fengli Zhou
- Department of General Practice, The Third Affiliated Hospital of Sun Yat-Sen University Lingnan Hospital, Guangzhou, Guangdong Province, People’s Republic of China
| | - Xiaoyun Liu
- Department of General Practice, The Third Affiliated Hospital of Sun Yat-Sen University Lingnan Hospital, Guangzhou, Guangdong Province, People’s Republic of China
| | - Jiabao Huang
- Department of General Practice, The Third Affiliated Hospital of Sun Yat-Sen University Lingnan Hospital, Guangzhou, Guangdong Province, People’s Republic of China
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Cui W, Hale RC, Huang Y, Zhou F, Wu Y, Liang X, Liu Y, Tan H, Chen D. Sorption of representative organic contaminants on microplastics: Effects of chemical physicochemical properties, particle size, and biofilm presence. Ecotoxicol Environ Saf 2023; 251:114533. [PMID: 36638563 DOI: 10.1016/j.ecoenv.2023.114533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 09/19/2022] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
Microplastic pollution has attracted mounting concerns worldwide. Microplastics may concentrate organic and metallic contaminants; thus, affecting their transport, fate and organismal exposure. To better understand organic contaminant-microplastic interactions, our study explored the sorption of selected polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), α-hexabromocyclododecane (α-HBCDD), and organophosphate flame retardants (OPFRs) on high-density polyethylene (HDPE) and polyvinylchloride (PVC) microplastics under saline conditions. Sorption isotherms determined varied between chemicals and between HDPE and PVC microplastics. Log Freundlich sorption coefficients (Log KF) for the targeted chemicals ranged from 2.01 to 5.27 L kg-1 for HDPE, but were significantly lower for PVC, i.e., ranging from Log KF data (2.84 - 8.58 L kg-1). Significant correlations between chemicals' Log KF and Log Kow (octanol-water partition coefficient) indicate that chemical-dependent sorption was largely influenced by their hydrophobicity. Sorption was evaluated using three size classes (< 53, 53 - 300, and 300 - 1000 µm) of lab-fragmented microplastics. Particle size did not significantly affect sorption isotherms, but influenced the time to reach equilibrium and the predicted maximum sorption, likely related to microplastic surface areas. The presence of biofilms on HDPE particles significantly enhanced contaminant sorption capacity, indicating more complex sorption dynamics in the chemical-biofilm-microplastic system. Our findings offer new insights into the chemical-microplastic interactions in marine environment.
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Affiliation(s)
- Wenxuan Cui
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Robert C Hale
- Department of Aquatic Health Sciences, Virginia Institute of Marine Science, William & Mary, Gloucester Point, VA 23011, USA
| | - Yichao Huang
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Fengli Zhou
- Research Center of Harmful Algae and Marine Biology, Jinan University, Guangzhou 510632, China
| | - Yan Wu
- School of Geographic Sciences, East China Normal University, Shanghai 200241, China
| | - Xiaolin Liang
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Yang Liu
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Hongli Tan
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China; State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, 999077, Hong Kong Special Administrative Region of China.
| | - Da Chen
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
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Li C, Sun Y, Li J, Zhang T, Zhou F, Song Q, Liu Y, Brestic M, Chen TH, Yang X. ScCBF1 plays a stronger role in cold, salt and drought tolerance than StCBF1 in potato (Solanum tuberosum). J Plant Physiol 2022; 278:153806. [PMID: 36115270 DOI: 10.1016/j.jplph.2022.153806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 08/29/2022] [Accepted: 08/29/2022] [Indexed: 06/15/2023]
Abstract
Solanum tuberosum (St) and Solanum commersonii (Sc) are two potato varieties with different freezing tolerance. Among them, St is a freezing-sensitive variety and. Sc is a cold-resistant wild potato. CBF/DREB family members mainly function in response to freezing stress. In order to explore the different roles of St C-Repeat Binding Factor1 (StCBF1) and Sc C-Repeat Binding Factor1 (ScCBF1) in potato plants (Solanum tuberosum) under stress conditions, two kinds of potato lines were obtained with ScCBF1 and StCBF1 overexpressing respectively. Phenotypes analysis showed that both overexpressing ScCBF1 and StCBF1 caused smaller leaves, and reduced tuber yield. While the limited phenotypes of StCBF1 lines were more severe than that of ScCBF lines. After freezing treatment, StCBF1 over expression plants grown better than WT plants and worse than ScCBF1 over expression plants. Specifically, compared with wild-type lines, overexpressing ScCBF1 could up-regulate fatty acid desaturase genes, key enzyme of Calvin cycle genes, and antioxidant enzyme genes. Both ScCBF1 and StCBF1 lines showed higher PSII activity, thus maintaining a higher photosynthetic rate under cold stress. In addition, we also found that overexpression ScCBF1 and StCBF1 could also enhance the drought and salt tolerance in potato. In summary, ScCBF1 plays a stronger role in cold, salt, and drought tolerance than StCBF1 in potato (Solanum tuberosum).
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Affiliation(s)
- Chongyang Li
- College of Life Science, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, China
| | - Yalu Sun
- College of Life Science, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, China
| | - Jian Li
- College of Life Science, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, China
| | - Tianpeng Zhang
- College of Life Science, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, China
| | - Fengli Zhou
- College of Life Science, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, China
| | - Qiping Song
- College of Life Science, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, China
| | - Yang Liu
- College of Life Science, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, China
| | - Marian Brestic
- Department of Plant Physiology, Slovak University of Agriculture, A. Hlinku 2, Nitra, 94976, Slovak Republic
| | - Tony Hh Chen
- Department of Horticulture, ALS 4017, Oregon State University, Corvallis, OR, 97331, USA
| | - Xinghong Yang
- College of Life Science, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, China.
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Zhang H, Zhou F, Huang J, Liu X, Xu H, Liang J, Wang J, Chen J, Liu L, Li Y, Hu X, Chen X, Liu C, Zhang K. Severe skin and subcutaneous pythiosis in China: Metagenomic identification and characterization of Pythium insidiosum. Front Microbiol 2022; 13:1002460. [PMID: 36246283 PMCID: PMC9561815 DOI: 10.3389/fmicb.2022.1002460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 09/06/2022] [Indexed: 11/13/2022] Open
Abstract
Pythium insidiosum is a rare fungus-like pathogen that is known to cause pythiosis in mammals with high morbidity and mortality. Identification of the pathogen is essential for timely treatment and rational use of antibiotics. However, Pythium insidiosum is difficult to detect via conventional microbiological tests. The current gold standard is polymerase chain reaction, which is lacking in most hospitals since human pythiosis is rare in China. In this study, we used metagenomic Next-Generation Sequencing and identified Pythium insidiosum in a 56-year-old Chinese male who was hospitalized due to severe edema in the right lower limb with scattered darkening indurations. The patient had a history of cirrhosis and occupational exposure to swamp water. Serological level of immune biomarkers indicated immunodeficiency, and Proteinase 3-Anti-Neutrophil Cytoplasmic Antibody was positive. Surgical incision of the lesions revealed radiating and reticular cutaneous ulcers. Microbial infections were suspected but conventional tests failed to discover the etiology. Empirical use of penicillin, vancomycin, and ceftriaxone had no effect. As a result, the peripheral blood and tissue biopsies were sent for metagenomic Next-Generation Sequencing, which reported Pythium insidiosum. This finding was corroborated by pathological staining, whole-genome sequencing, and internal transcribed spacer sequencing. Notably, antifungal treatment was ineffective, but the patient responded well to oral trimethoprim–sulfamethoxazole, which may be due to the folp gene found in Pythium insidiosum genome. Our study prompts future studies to determine the optimal treatment of skin pythiosis.
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Affiliation(s)
- Haiyan Zhang
- Department of General Practice, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Fengli Zhou
- Department of General Practice, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jiabao Huang
- Department of General Practice, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiaoyun Liu
- Department of General Practice, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Hui Xu
- Department of General Practice, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jiayin Liang
- Department of Clinical Laboratory, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jun Wang
- Hangzhou Matridx Biotechnology Co., Ltd, Hangzhou, China
| | - Jing Chen
- Hangzhou Matridx Biotechnology Co., Ltd, Hangzhou, China
| | - Lingling Liu
- Department of General Practice, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yiting Li
- Department of General Practice, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xuan Hu
- Department of General Practice, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xuanrong Chen
- Department of General Practice, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Chao Liu
- Hangzhou Matridx Biotechnology Co., Ltd, Hangzhou, China
- *Correspondence: Chao Liu, Kouxing Zhang,
| | - Kouxing Zhang
- Department of General Practice, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Department of General Intensive Care Unit, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- *Correspondence: Chao Liu, Kouxing Zhang,
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6
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Yang P, Zhang D, Zhou F, Chen W, Hu C, Xiao D, Cai S. miR-203a-3p-DNMT3B feedback loop facilitates non-small cell lung cancer progression. Hum Cell 2022; 35:1219-1233. [PMID: 35670956 DOI: 10.1007/s13577-022-00728-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 05/17/2022] [Indexed: 11/04/2022]
Abstract
It has been reported that microRNA-203a-3p (miR-203a-3p) modulates cell proliferation, migration and invasion in a variety of cancer cell types. However, little is known about its role in lung cancer progression. The present study found that miR-203a-3p was downregulated in non-small cell lung cancer (NSCLC) cell lines and tissues. Overexpression of miR-203a-3p inhibits NSCLC cell proliferation, migration and invasion, and promotes cellular apoptosis in vitro. Restoration of miR-203a-3p expression in A549 and NCI-H520 cells enhances their chemosensitivity. Further experiments showed that DNA methyltransferase 3B (DNMT3B) was a direct target of miR-203a-3p. In addition, the present results revealed that promoter hypermethylation was the potential mechanism responsible for low miR-203a-3p expression in NSCLC. Notably, feedback regulation between miR-203a-3p and DNMT3B was observed in NSCLC. Moreover, Overexpression of miR-203a-3p reduces tumor growth in vivo. In summary, the present study has identified an miR-203a-3p-DNMT3B feedback loop that facilitates NSCLC progression.
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Affiliation(s)
- Pingshan Yang
- Department of Thoracic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, People's Republic of China
| | - Dongdong Zhang
- Department of Thoracic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, People's Republic of China
| | - Fengli Zhou
- Departments of General Practice, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510630, Guangdong, People's Republic of China
| | - Wenyou Chen
- Department of Thoracic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, People's Republic of China
| | - Chuang Hu
- Department of Thoracic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, People's Republic of China
| | - Duqing Xiao
- Department of Thoracic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, People's Republic of China
| | - Songwang Cai
- Department of Thoracic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, People's Republic of China.
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Wang W, Xu Y, Wang X, Chu Y, Zhang H, Zhou L, Zhu H, Li J, Kuai R, Zhou F, Yang D, Peng H. Swimming Impedes Intestinal Microbiota and Lipid Metabolites of Tumorigenesis in Colitis-Associated Cancer. Front Oncol 2022; 12:929092. [PMID: 35847876 PMCID: PMC9285133 DOI: 10.3389/fonc.2022.929092] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 06/03/2022] [Indexed: 12/09/2022] Open
Abstract
Background Accumulating data support that regular physical activity potentially inhibits chronic colitis, a risk factor for colitis-associated cancer (CAC). However, possible effects of physical activity on CAC and the underlying mechanisms remain poorly understood. Methods A pretreatment of swimming on azoxymethane/dextran sodium sulfate (AOM/DSS)-induced CAC mice was implemented to determine its protective effect. Inflammation and tumorigenesis were assessed using colorectums from C57BL/6 mice. In order to determine how swimming alters colonic lipid metabolism and gene expression, a comparative analysis was conducted. Meanwhile, alterations in intestinal microbiota and short-chain fatty acids (SCFAs) were detected and analyzed. Finally, an integration analysis of colonic lipid metabolism with gene expression and intestinal microbiota was performed respectively. Result Swimming pretreatment relieved bowel inflammation and minimized tumor formation. We demonstrated that prostaglandin E2 (PGE2)/PGE2 receptor 2 subtype (EP2) signaling as a potential regulatory target for swimming induces colonic lipid metabolites. Swimming-induced genera, Erysipelatoclostridium, Parabacteroides, Bacteroides, and Rikenellaceae_RC9_gut_group, induced intestinal SCFAs and affected the function of colonic lipid metabolites enriched in glycerophospholipid metabolism and choline metabolism in cancer. Conclusion According to our experiments, swimming pretreatment can protect mice from CAC by intervention in the possible link between colonic lipid metabolites and PGE2/EP2 signaling. Further, swimming-induced genera and probiotics promoted glycerophospholipid metabolism and choline metabolism in cancer, the major constituents of colonic lipid metabolites, and increased SCFAs, which were also important mechanisms for the anti-inflammatory and anti-tumorigenic effects of swimming.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Daming Yang
- *Correspondence: Haixia Peng, ; Daming Yang,
| | - Haixia Peng
- *Correspondence: Haixia Peng, ; Daming Yang,
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Xu S, Wang X, Liu J, Zhou F, Guo K, Chen S, Wang ZH, Wang Y. Bacteria Associated With Phaeocystis globosa and Their Influence on Colony Formation. Front Microbiol 2022; 13:826602. [PMID: 35250943 PMCID: PMC8891983 DOI: 10.3389/fmicb.2022.826602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 01/04/2022] [Indexed: 11/13/2022] Open
Abstract
Phaeocystis globosa (P. globosa) is one of the dominant algae during harmful algal blooms (HABs) in coastal regions of Southern China. P. globosa exhibits complex heteromorphic life cycles that could switch between solitary cells and colonies. The ecological success of P. globosa has been attributed to its colony formation, although underlying mechanisms remain unknown. Here, we investigated different bacterial communities associated with P. globosa colonies and their influence on colony formation of two P. globosa strains isolated from coastal waters of Guangxi (GX) and Shantou (ST). Eight operational taxonomic units (OTUs) were observed in ST co-cultures and were identified as biomarkers based on Linear discriminant analysis Effect Size (LEfSe) analysis, while seven biomarkers were identified in P. globosa GX co-cultures. Bacterial communities associated with the P. globosa GX were more diverse than those of the ST strain. The most dominant phylum in the two co-cultures was Proteobacteria, within which Marinobacter was the most abundant genus in both GX and ST co-cultures. Bacteroidota were only observed in the GX co-cultures and Planctomycetota were only observed in the ST co-cultures. Co-culture experiments revealed that P. globosa colony formation was not influenced by low and medium cell densities of Marinobacter sp. GS7, but was inhibited by high cell densities of Marinobacter sp. GS7. Overall, these results indicated that the associated bacteria are selected by different P. globosa strains, which may affect the colony formation and development of P. globosa.
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Affiliation(s)
- Shuaishuai Xu
- College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Xiaodong Wang
- College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Jie Liu
- College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Fengli Zhou
- College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Kangli Guo
- Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Songze Chen
- Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Zhao-hui Wang
- College of Life Science and Technology, Jinan University, Guangzhou, China
- *Correspondence: Zhao-hui Wang,
| | - Yan Wang
- College of Life Science and Technology, Jinan University, Guangzhou, China
- Yan Wang,
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Sun J, Zhang L, Zhou F, Shaw S, Roos A, Berger M, Bäcklin BM, Huang Y, Zheng X, Wang X, Chen D. Hepatic Fatty Acid Profiles Associated with Exposure to Emerging and Legacy Halogenated Contaminants in Two Harbor Seal Populations across the North Atlantic. Environ Sci Technol 2022; 56:1830-1840. [PMID: 35068154 DOI: 10.1021/acs.est.1c06512] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Fatty acids (FAs) have been extensively used as indicators of foraging ecology in marine mammals, yet their association with exposure to contaminants has rarely been investigated. The present study provided the first characterization of the relationship between hepatic FA profiles and exposure to a suite of contaminants in a sentinel species─the harbor seal (Phoca vitulina)─from the Gulf of Maine and the south coast of Sweden. FA profiles differed in the two seal populations, and the levels of legacy and alternative brominated flame retardants and polyhalogenated carbazoles were significantly elevated in Maine seals. Correlations between individual FAs and multiple flame retardants (FRs) and poly- and perfluoroalkyl substances (PFASs) were found in seals from both populations. Moreover, several FR and PFAS chemicals were significantly associated with the estimated desaturating enzyme activity inferred from the FA profiles. The ratios of poly to monounsaturated FAs (∑PUFAs/∑MUFAs) and those of unsaturated to saturated FAs (∑UFAs/∑SFAs) were significantly associated with HBBZ, PFHxS, or BDE 47 in seals from Maine and Sweden, whereas ∑n - 6/∑n - 3 PUFAs was significantly associated with BDE 154 and 36-CCZ in Swedish and Maine seals, respectively. Our results suggest the lipid metabolism-disrupting potential of these contaminants in marine mammals and warrant continuous biomonitoring and risk assessment, considering the critical role of PUFAs in vital biological processes.
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Affiliation(s)
- Jiachen Sun
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, CN-510632 Guangzhou, Guangdong, China
| | - Long Zhang
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, CN-510632 Guangzhou, Guangdong, China
| | - Fengli Zhou
- Research Center of Harmful Algae and Marine Biology, Jinan University, CN-510632 Guangzhou, Guangdong, China
| | - Susan Shaw
- Shaw Institute, Blue Hill Research Center, Blue Hill, Maine 04614, United States
| | - Anna Roos
- Department of Contaminant Research and Monitoring, Swedish Museum of Natural History, Box 5007, Stockholm SE-10405, Sweden
| | - Michelle Berger
- Shaw Institute, Blue Hill Research Center, Blue Hill, Maine 04614, United States
| | - Britt-Marie Bäcklin
- Department of Contaminant Research and Monitoring, Swedish Museum of Natural History, Box 5007, Stockholm SE-10405, Sweden
| | - Yichao Huang
- Department of Toxicology, School of Public Health, Anhui Medical University, CN-230032 Hefei, Anhui, China
| | - Xiaoshi Zheng
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, CN-510632 Guangzhou, Guangdong, China
| | - Xiaodong Wang
- Research Center of Harmful Algae and Marine Biology, Jinan University, CN-510632 Guangzhou, Guangdong, China
| | - Da Chen
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, CN-510632 Guangzhou, Guangdong, China
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Xu Y, Wang X, Chu Y, Li J, Wang W, Hu X, Zhou F, Zhang H, Zhou L, Kuai R, Jin Y, Yang D, Peng H. Analysis of transcript-wide profile regulated by microsatellite instability of colorectal cancer. Ann Transl Med 2022; 10:169. [PMID: 35280417 PMCID: PMC8908136 DOI: 10.21037/atm-21-6126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 02/14/2022] [Indexed: 11/08/2022]
Abstract
Background Microsatellite instability-high (MSI-H) is a form of genomic instability present in 15% of colorectal cancer (CRC) cases. Several differential gene analyses have been conducted on CRC; however, none have specifically explored the differentially expressed genes in MSI-H CRC. Research on the different gene expressions between MSI-H CRC and microsatellite stable (MSS) CRC, and their different patterns of metastasis will provide invaluable insights for diagnosis, prognosis, and treatment. Methods In this study, the differential expression of 46,602 genes were analyzed across 613 different tissue samples from The Cancer Genome Atlas (TCGA)-colon adenocarcinoma (COAD) and TCGA-rectum adenocarcinoma (READ) as part of a gene association analysis. R package TCGAbiolinks (version 2.18.0) was used to download the data set, and DESeq2 (version 1.30.1) was used for the differential gene analysis. The resulting genes were then analyzed for shared pathways with R package clusterProfiler (version 3.0.4). Results A total of 237 significantly differentially expressed genes (Padj<0.05) were found between MSI-H and MSS CRC. Differentially expressed genes include insulin like growth factor 2 (IGF2) and fibroblast growth factor 3 (FGF3), and the enriched pathways mostly involve hearing, digestive regulation, and neurogenesis.463 differentially expressed genes were found between metastatic and non-metastatic CRC. Notably differentially expressed genes in metastatic CRC include DEAD-box helicase 53 (DDX53) and adiponectin, C1Q and collagen domain containing (ADIPOQ), and enriched pathways include the immune system, cell adhesion, and cell signaling. For MSI-H CRC, a total of 34 genes were significantly differently expressed between metastatic and non-metastatic CRC. These include notum, palmitoleoyl-protein carboxylesterase (NOTUM), serpin family B member 2 (SERPINB2), and several keratin (KRT) genes, and the pathway analysis showed the major enrichment of the hormonal and secretion and regulation pathways. Of the differentially expressed genes in metastatic CRC, 25 were immunity related and include fatty acid binding protein 4 (FABP4), and the pathway analysis showed the enrichment of humoral immunity and lymphocyte regulation. Conclusions Of the biologically plausible differentially expressed genes, the most notable were NOTUM, KRT6A, KRT14, SERPINB2, and serum amyloid A1 (SAA1). NOTUM, KRT6A, and KRT14 are active in the Wnt pathway. All five are also involved in various inflammation pathways.
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Affiliation(s)
- Ying Xu
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xiaofeng Wang
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yimin Chu
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ji Li
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Weiyi Wang
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xiangyu Hu
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Fengli Zhou
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Haiqin Zhang
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Lu Zhou
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Rong Kuai
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yunfei Jin
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Daming Yang
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Haixia Peng
- Digestive Endoscopy Center, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Zhang T, Zhang W, Li D, Zhou F, Chen X, Li C, Yu S, Brestic M, Liu Y, Yang X. Glycinebetaine: a versatile protectant to improve rice performance against aluminium stress by regulating aluminium uptake and translocation. Plant Cell Rep 2021; 40:2397-2407. [PMID: 34524480 DOI: 10.1007/s00299-021-02780-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 09/03/2021] [Indexed: 05/11/2023]
Abstract
Glycinebetaine alleviates the detrimental effects of aluminium stress by regulating aluminium uptake and translocation, maintaining PSII activity, and activating the oxidative defence, thereby maintaining the growth and development of rice. Aluminium (Al) toxicity is one of the primary growth-limiting factors that limits plant growth and crop productivity in acidic soils. Rice (Oryza sativa L.) plants are susceptible to Al stress and do not naturally accumulate glycinebetaine (GB), one of the most effective protectants. Therefore, the objective of this study was to investigate whether exogenous GB can ameliorate the detrimental effects of Al stress on rice plants. Our results showed that the growth, development and biomass of rice were clearly inhibited under Al stress. However, exogenous GB application increased rice shoot growth and photosynthetic pigments contents, maintained photosystem II (PSII) activity, and activated the antioxidant defence system under Al stress. More importantly, GB may mediate the expression of Al uptake- and translocation-related genes, including OsALS1, OsNrat1, OsSTAR1 and OsSTAR2, and the galacturonic acid contents in rice roots under Al stress. Therefore, our findings highlight exogenous GB application is a valid approach to effectively combat Al toxicity by regulating physiological and biochemical processes in crops.
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Affiliation(s)
- Tianpeng Zhang
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, Shandong, China
| | - Wenxiu Zhang
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, Shandong, China
| | - Daxing Li
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, Shandong, China
| | - Fengli Zhou
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, Shandong, China
| | - Xiao Chen
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, Shandong, China
| | - Chongyang Li
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, Shandong, China
| | - Sang Yu
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, Shandong, China
| | - Marian Brestic
- Department of Plant Physiology, Slovak University of Agriculture, A. Hlinku 2, Nitra, 94976, Slovak Republic
| | - Yang Liu
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, Shandong, China.
| | - Xinghong Yang
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, Shandong, China.
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Abstract
Objective: To investigate the mechanism of tripartite motif-containing 27 (TRIM27) expression promoting inflammatory response in non-small lung cancer cells. Methods: Ten cases of lung cancer tissues and their matched normal tissue (the distance was 5 cm of the tumor marginal) from patients underwent resection in the People's Hospital of Pingyang Hospital Affiliated to Wenzhou Medical University were collected. The expression of TRIM27 was identified by using real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) and western blot. TRIM27 knockdown experiment included negative control (NC(TRIM27)) group, TRIM27 short interfering RNA (siRNA) group, NC(TRIM27)+ TNF-α group and TRIM27 siRNA+ TNF-α group. Interlukin-6 (IL-6) knockdown experiment included NC(IL-6) group and IL-6 siRNA group. The protein expressions of TRIM27, TNFR1, TNFR2 and some TNFR related inflammation factors were verified by qRT-PCR and WB. Results: The expression levels of TRIM27 in NSCLC tissues of different stages (stage Ⅰ: 2.81±0.58, stage Ⅱ: 3.32±1.38, stage Ⅲ: 3.67±1.24) was higher than that in the adjacent normal tissues (1.01±0.15, 0.92±0.10 and 1.05±0.12, P<0.05). The expression levels of TRIM27 mRNA in NC(TRIM27) group and NC(TRIM27)+ TNF-α group were 0.94±0.12 and 1.67±0.03, and the expression levels of TRIM27 protein were 0.31±0.02 and 0.38±0.01, respectively (P<0.05). The expression levels of IL-6 mRNA in NC(TRIM27)+ TNF-α group and TRIM27 siRNA+ TNF-α group were 11.35±0.12 and 5.62±0.15, respectively, and the expression levels of VCAM-1 mRNA were 18.75±0.17 and 9.35±0.11, respectively. STAT3 mRNA expression levels were 16.54±0.10 and 8.12±0.10, respectively, with statistical significance (P<0.05). The expression levels of IL-6 mRNA in NC(IL-6) group and IL-6 siRNA group were 1.10±0.07 and 0.52±0.16, respectively, and the expression levels of STAT3 mRNA were 1.01±0.01 and 0.48±0.12, respectively. The expression levels of TRIM27 mRNA were 1.03±0.01 and 0.30±0.11, respectively, with statistical significance (P<0.05). Conclusion: The upregulation of TRIM27 in NSCLC tissue and cells promotes the expression of TNF-α, and may activate inflammatory response by regulating TNF-α-induced IL-6/STAT3 signaling pathway.
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Affiliation(s)
- E J Chen
- Department of Respiratory Medicine, the People's Hospital of Pingyang Hospital Affiliated to Wenzhou Medical University, Wenzhou 325400, China
| | - S Chen
- Department of Respiratory Medicine, the People's Hospital of Pingyang Hospital Affiliated to Wenzhou Medical University, Wenzhou 325400, China
| | - F L Zhou
- Department of Respiratory Medicine, the People's Hospital of Pingyang Hospital Affiliated to Wenzhou Medical University, Wenzhou 325400, China
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Shang YF, Liu T, Yu JN, Xu XR, Zahid KR, Wei YC, Wang XH, Zhou FL. Half-year follow-up of patients recovering from severe COVID-19: Analysis of symptoms and their risk factors. J Intern Med 2021; 290:444-450. [PMID: 33904618 PMCID: PMC8242565 DOI: 10.1111/joim.13284] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 03/10/2021] [Accepted: 03/10/2021] [Indexed: 12/15/2022]
Abstract
OBJECTIVES To understand the sequelae of COVID-19. METHODS We followed up 1174 patients with severe coronavirus disease 2019 (COVID-19)who were recovered and discharged for 6 months. RESULTS There were 175 cases with clear IgG results 6 months after discharge, of which 82 (46.9%) were IgG (+) and 16 (9.1%) were IgG (dim+). Four hundred and forty-one participants (55.4%) had some kind of sequelae. The most common symptoms were fatigue (25.3%), sleep disorder (23.2%) and shortness of breath (20.4%). In those who had sequelae, 262 (59.4%) had more than one symptom. Critical cases were more likely to have cough (20.5% vs 11.6%, p = 0.023) and hypomnesis (15.1% vs 8.0%, p = 0.041) than severe cases. Furthermore, univariate and multivariate logistic regression analyses revealed that women are more likely to have multiple symptoms (p = 0.002), fatigue (p = 0.009) and sleep disorder (p = 0.008), whereas critical illness was found as independent risk factor for hypomnesis (p = 0.045). CONCLUSION Our study demonstrated the duration of antibody and sequelae of COVID-19 and compared the differences amongst different populations.
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Affiliation(s)
- Y F Shang
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - T Liu
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - J N Yu
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - X R Xu
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - K R Zahid
- Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Science and Oceanography, Carson International Cancer Center, Shenzhen University, Shenzhen, China
| | - Y C Wei
- Department of Radiology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - X H Wang
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - F L Zhou
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, China
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Wu Z, Zou X, Xu Y, Zhou F, Kuai R, Li J, Yang D, Chu Y, Peng H. Ajuba transactivates N-cadherin expression in colorectal cancer cells through interaction with Twist. J Cell Mol Med 2021; 25:8006-8014. [PMID: 34173718 PMCID: PMC8358848 DOI: 10.1111/jcmm.16731] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 05/06/2021] [Accepted: 05/29/2021] [Indexed: 12/18/2022] Open
Abstract
Ajuba is a multiple LIM domain‐containing protein and functions as a transcriptional coregulator to modulate many gene expressions in various cellular processes. Here, we describe that the LIM domain of Ajuba interacts with Twist, and the Twist box is a pivotal motif for the interaction. Biologically, Ajuba enhances transcription of target gene N‐cadherin as an obligate coactivator of Twist. The enhancement is achieved by binding to the E‐box element within N‐cadherin promoter as revealed by luciferase reporter and chromatin immunoprecipitation assays. Mechanistic investigation demonstrates that Ajuba recruits CBP and Twist to form a ternary complex at the Twist target promoter region and concomitantly enhances histone acetylation at these sites. These findings identify that Twist is a new interacting protein of Ajuba and Ajuba/Twist/CBP ternary complex may be a potential treatment strategy for Twist‐related tumour metastasis.
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Affiliation(s)
- Zhaoxia Wu
- Digestive Endoscopy Center, Key Laboratory for Translational Research and Innovative Therapeutics of Gastrointestinal Oncology, Hongqiao International Institute of Medicine, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiuqun Zou
- Department of Biochemistry & Molecular Cellular Biology, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ying Xu
- Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Fengli Zhou
- Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Rong Kuai
- Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ji Li
- Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Daming Yang
- Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yimin Chu
- Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Haixia Peng
- Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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He L, Luo JJ, Zhou FL, Fan JY, Shi HJ, He YC, Jiang YL. [CD44 regulates biological behavior and Ras signaling pathway in nasopharyngeal carcinoma stem cells]. Zhonghua Zhong Liu Za Zhi 2021; 43:180-187. [PMID: 33601482 DOI: 10.3760/cma.j.cn112152-20190322-00182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the biological behavior of nasopharyngeal carcinoma stem cells and to explore the activation of Ras signaling pathway regulated by CD44. Methods: CNE2-SC and 5-8F-SC were nasopharyngeal carcinoma stem cells and obtained by serum-free suspension culture. Cell counting kit-8 (CCK-8) assay, colony formation assay, Transwell migration assay, cell adhesion array were used to investigate the growth, proliferation, migration and adhesion of nasopharyngeal carcinoma stem cells. Western blot test was used to detect the expressions of Ras signaling pathway related proteins and siRNA-mediated interference was used to determine the activation of Ras signaling pathway regulated by CD44. Results: The growth rates of CNE2-SC and 5-8F-SC cells were significantly lower than those of nasopharyngeal carcinoma cells at 24, 48 and 72 hours after inoculation (P<0.05). After 14 days of implantation, the colony formation rates of CNE2-SC (44.5±1.9)% and 5-8F-SC (47.4±1.8)% were higher than those of CNE2 (34.9±1.5)% and 5-8F (37.2±1.7)%, respectively(P<0.01). The migration cell number of CNE2-SC was (87.6±7.8), 3.97 times higher than that of CNE2 (P<0.01). The migration cell number of 5-8F-SC was (67.2±5.7), 3.07 times higher than 5-8F (P<0.01). The adhesion rates of CNE2-SC and CNE2 cells were (42.1±7.6)% and (8.9±2.0)%, respectively at 3 hours after inoculation and were (82.4±5.0)% and (12.1±2.2)% at 6 hours after inoculation, respectively. The adhesion rate of CNE2-SC cells was higher than that of CNE2 cells (all P<0.01). The adhesion rates of 5-8F-SC and 5-8F cells were (53.6±6.1)% and (7.3±1.5)% at 3 hours after inoculation, and (90.7±3.6)% and (11.0±1.2)% at 6 hours after inoculation, respectively. The adhesion rate of 5-8F-SC cells was higher than that of 5-8F cells (P<0.01). The expression levels of CD44, Ras and N-cadherin were significantly higher, while phosphatase and tensin homolog deleted on chromosome 10 (PTEN), E-cadherin in nasopharyngeal carcinoma stem cells were lower than those of the nasopharyngeal carcinoma cells. Furthermore, the levels of phosphorylated mitogen extracellular kinase1/2 (p-MEK1/2) and phosphorylated extracellular signal-regulated protein kinase1/2 (p-ERK1/2)were significantly increased in nasopharyngeal carcinoma stem cells (P<0.01). Correlation analysis showed that the protein expression levels of CD44 was highly positively correlated with RAS in nasopharyngeal carcinoma stem cells(r=0.985, P=0.002; r=0.962, P=0.038). Deletion of CD44 in CNE2-SC decreased the expression levels of HER-2, Ras and p-ERK1/2, p-Akt and phosphorylated protein kinase C-δ(p-PKCδ) (P<0.01). Conclusions: Despite compare to the nasopharyngeal carcinoma cell, nasopharyngeal carcinoma stem cells grows at a relatively slow rate, the capacities of clone formation, migration, adhesion are promoted. This may be related to the CD44-regulated abnormal activation of Ras signaling pathway.
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Affiliation(s)
- L He
- College of Integration of Traditional Chinese and Western Medicine, Hunan University of Traditional Chinese Medicine, Changsha 410208, China
| | - J J Luo
- Hunan Provincial Key Laboratory for the Prevention and Treatment of Ophthalmology and Otolaryngology Diseases with Traditional Chinese Medicine, Changsha 410208, China
| | - F L Zhou
- Hunan Provincial Key Laboratory for the Prevention and Treatment of Ophthalmology and Otolaryngology Diseases with Traditional Chinese Medicine, Changsha 410208, China
| | - J Y Fan
- Hunan Provincial Key Laboratory for the Prevention and Treatment of Ophthalmology and Otolaryngology Diseases with Traditional Chinese Medicine, Changsha 410208, China
| | - H J Shi
- Hunan Provincial Key Laboratory for the Prevention and Treatment of Ophthalmology and Otolaryngology Diseases with Traditional Chinese Medicine, Changsha 410208, China
| | - Y C He
- Hunan Provincial Ophthalmology and Otolaryngology Diseases Prevention and Treatment with Traditional Chinese Medicine and Visual Function Protection Engineering and Technological Research Center, Changsha 410208, China
| | - Y L Jiang
- Department of Oncology, Hunan Academy of Traditional Chinese Medicine Affiliated Hospital, Changsha 410006, China
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Zhou F, Wang Z, Mai X, Liu X, Reid C, Sandover S, Zhang K, Xu D. Online Clinical Consultation as a Utility Tool for Managing Medical Crisis During a Pandemic: Retrospective Analysis on the Characteristics of Online Clinical Consultations During the COVID-19 Pandemic. J Prim Care Community Health 2020; 11:2150132720975517. [PMID: 33213264 PMCID: PMC7682203 DOI: 10.1177/2150132720975517] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Coronavirus disease 2019 (COVID-19) is a newly-identified infectious diseases that has rapidly spread throughout the world with rising fatalities with declaration by World Health Organization as the pandemic. Online consultations have been shown to alleviate the pandemic with our study aims to demonstrate whether online consultation can be a solution for acute health crisis. Retrospective analysis of the characteristics of online consultations through two primary care online-consultation platforms during COVID-19 pandemic was performed at the Third Affiliated Hospital of Sun Yat-Sen University, which led the assessment of COVID-19-symptoms patients in Guangzhou. The 3473 online consultations were divided into pre-pandemic and pandemic period groups with Chi-square test as statistical analysis method. The number of online consultations has increased with diagnosis of upper respiratory tract infection, psychological conditions, COVID-19-related investigations and interventions. The increased online consultations met the increased demand of the relevant clinical services and reduced the overwhelming hospital presentations, thus decreasing the potential COVID-19 spread inside the major tertiary hospital and sparing the resources for acute crisis management. The epidemiology and disease characteristics of online consultations during the pandemic have been demonstrated with identification of the enabling factors and potential barriers in improving online healthcare in China with online consultation model being a durable solution for pandemic in future.
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Affiliation(s)
- Fengli Zhou
- Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Zhouhan Wang
- Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaojun Mai
- Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Xiaoyun Liu
- Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | | | | | - Kouxing Zhang
- Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Dan Xu
- Curtin University, Perth, Australia
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Guo YH, Xu DB, Jiang QC, Shi Y, Zhou FL, Yuan QQ. [Comprehensive benefits of agroforestry snail control forests in Eryuan County, Yunnan Province]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2020; 32:384-388. [PMID: 32935513 DOI: 10.16250/j.32.1374.2019029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To investigate the efficiency of various agroforestry systems for snail control in plateau hilly schistosomiasis-endemic areas of Yunnan Province, so as to provide insights into the construction of agroforestry schistosomiasis control projects in plateau hilly regions. METHODS The pilot areas of snail control forests with various agroforestry systems were built in snail-breeding farmlands in Eryuan County, Yunnan Province in 2010, and the economic benefits and snail control effect were investigated in 2018. In addition, a fuzzy comprehensive evaluation model was created to screen the agroforestry system with high comprehensive benefits. RESULTS A total of 14 types of pilot areas of snail control forests with various agroforestry systems were built. Economic benefit analysis showed that the"walnut + garlic"pattern had the best economic benefit, with annual economic benefits of 270 000 Yuan/hm2, followed by the"walnut + chili"pattern (annual economic benefits of 120 000 Yuan/hm2) and the "walnut + vegetables"pattern (annual economic benefits of 105 000 Yuan/hm2). No snails were detected in 8 types of the agroforestry systems, including the"walnut + chili"pattern, the"walnut + tobacco"pattern and the"walnut + garlic"pattern; however, there were snail found with various densities in other types of systems. Fuzzy comprehensive evaluation showed that the"walnut + garlic"pattern had the best comprehensive control effect, followed by the"walnut + chili"pattern and the"walnut + tobacco" pattern, while the pure grassland pattern showed no effect on snail control. CONCLUSIONS The agroforestry system is a preferential approach of forestry schistosomiasis control in plateau hilly schistosomiasis-endemic areas, which not only achieves snail control effects, but also promotes economic development and ecological construction in poor hilly areas.
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Affiliation(s)
- Y H Guo
- Yunnan Academy of Forestry and Grassland, Kunming Yunnan 650201, China
| | - D B Xu
- Yunnan Academy of Forestry and Grassland, Kunming Yunnan 650201, China
| | - Q C Jiang
- Yunnan Academy of Forestry and Grassland, Kunming Yunnan 650201, China
| | - Y Shi
- Yunnan Academy of Forestry and Grassland, Kunming Yunnan 650201, China
| | - F L Zhou
- Yunnan Academy of Forestry and Grassland, Kunming Yunnan 650201, China
| | - Q Q Yuan
- Yunnan Academy of Forestry and Grassland, Kunming Yunnan 650201, China
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Liu X, Xu D, Zhou F, Zhang K. Reflections on General Practice Training in China: Innovative and Implementable ideas from the Guangdong General Practice Symposium. MedEdPublish 2020. [DOI: 10.15694/mep.2020.000059.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
This article was migrated. The article was not marked as recommended. Introduction:The concept of general practice in China was first introduced in 1980s in line with several years of healthcare reform. In the last 30 years of general practice development in Australia, the gatekeeping role of general practice has been slowly developed and formulated into health policy and has made steady progress with some remarkable success in certain parts of China. In Australia, general practice education and training were initiated at the time of the founding of the Royal Australian College of General Practitioners in 1964 and a relatively mature system of general practice education and training has been established. To establish a more relevant and effective training model of general practitioners in China by reference to Australian model will be an excellent starting point to introduce into the general practice education, training, clinical services and heath policy strategic plans in China. Methods: Feedbacks from general practice trainees at the Guangdong General Practice Forum collected via an online portal after the lectures and were subsequently analysed. Results: The feedback survey contained the evaluation questions regarding the GP's response to the academic contents, organization and administration of the forum. The GP trainers and trainees showed very high satisfaction (100%). Twenty-one (95.45%) of the GP trainees agree that the forum is very useful in clinical practice while one (4.55%) GP trainee disagreed slightly that the forum is ordinary. There were four implementable suggestions obtained from the feedback evaluation during the forum. Conclusions: More regular, frequent and consistent GP training forums with experienced overseas GP trainers and medical educators will be needed to improve GP education and training to accelerate the general practice education and training development in China.
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Yang W, Chang Z, Que R, Weng G, Deng B, Wang T, Huang Z, Xie F, Wei X, Yang Q, Li M, Ma K, Zhou F, Tang B, Mok VCT, Zhu S, Wang Q. Contra-Directional Expression of Plasma Superoxide Dismutase with Lipoprotein Cholesterol and High-Sensitivity C-reactive Protein as Important Markers of Parkinson's Disease Severity. Front Aging Neurosci 2020; 12:53. [PMID: 32210787 PMCID: PMC7068795 DOI: 10.3389/fnagi.2020.00053] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 02/18/2020] [Indexed: 12/18/2022] Open
Abstract
Aim: Oxidative stress and inflammation play critical roles in the neuropathogenesis of PD. We aimed to evaluate oxidative stress and inflammation status by measuring serum superoxide dismutase (SOD) with lipoprotein cholesterol and high-sensitivity C-reactive protein (hsCRP) respectively in PD patients, and explore their correlation with the disease severity. Methods: We performed a cross-sectional study that included 204 PD patients and 204 age-matched healthy controls (HCs). Plasma levels of SOD, hsCRP, total cholesterol, high-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C) were measured. A series of neuropsychological assessments were performed to rate the severity of PD. Results: The plasma levels of SOD (135.7 ± 20.14 vs. 147.2 ± 24.34, P < 0.0001), total cholesterol, HDL-C and LDL-C in PD were significantly lower than those in HCs; the hsCRP level was remarkably increased in PD compared to HC (2.766 ± 3.242 vs. 1.637 ± 1.597, P < 0.0001). The plasma SOD was negatively correlated with the hsCRP, while positively correlated with total cholesterol, HDL-C, and LDL-C in PD patients. The plasma SOD were negatively correlated with H&Y, total UPDRS, UPDRS (I), UPDRS (II), and UPDRS (III) scores, but positively correlated with MoCA and MMSE scores. Besides, hsCRP was negatively correlated with MoCA; while total cholesterol, HDL-C and LDL-C were positively correlated with the MoCA, respectively. Conclusion: Our findings suggest that lower SOD along with cholesterol, HDL-C and LDL-C, and higher hsCRP levels might be important markers to assess the PD severity. A better understanding of SOD and hsCRP may yield insights into the pathogenesis of PD.
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Affiliation(s)
- Wanlin Yang
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Zihan Chang
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Rongfang Que
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Guomei Weng
- Department of Neurology, The First People Hospital of Zhaoqing, Zhaoqing, China
| | - Bin Deng
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Ting Wang
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Zifeng Huang
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Fen Xie
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Xiaobo Wei
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Qin Yang
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Mengyan Li
- Department of Neurology, Guangzhou First People's Hospital, Guangzhou, China
| | - Kefu Ma
- Department of Neurology, Shenzhen People Hospital, Shenzhen, China
| | - Fengli Zhou
- Department of Respiratory Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Beisha Tang
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, China
| | - Vincent C T Mok
- Gerald Choa Neuroscience Centre, Department of Medicine and Therapeutics, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, China
| | - Shuzhen Zhu
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Qing Wang
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
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Xie F, Gao X, Yang W, Chang Z, Yang X, Wei X, Huang Z, Xie H, Yue Z, Zhou F, Wang Q. Advances in the Research of Risk Factors and Prodromal Biomarkers of Parkinson's Disease. ACS Chem Neurosci 2019; 10:973-990. [PMID: 30590011 DOI: 10.1021/acschemneuro.8b00520] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Parkinson's disease (PD) is the second most common neurodegenerative disease in the world. With the advent of an aging population and improving life expectancy worldwide, the number of PD patients is expected to increase, which may lead to an urgent need for effective preventive and diagnostic strategies for PD. Although there is increasing research regarding the pathogenesis of PD, there is limited knowledge regarding the prevention of PD. Moreover, the diagnosis of PD depends on clinical criteria, which require the occurrence of bradykinesia and at least one symptom of rest tremor or rigidity. However, converging evidence from clinical, genetic, neuropathological, and imaging studies suggests the initiation of PD-specific pathology prior to the initial presentation of these classical motor clinical features by years or decades. This latent stage of neurodegeneration in PD is a particularly important stage for effective neuroprotective therapies, which might retard the progression or prevent the onset of PD. Therefore, the exploration of risk factors and premotor biomarkers is not only crucial to the early diagnosis of PD but is also helpful in the development of effective neuroprotection and health care strategies for appropriate populations at risk for PD. In this review, we searched and summarized ∼249 researches and 31 reviews focusing on the risk factors and prodromal biomarkers of PD and published in MEDLINE.
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Affiliation(s)
- Fen Xie
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Gongye Road 253, Guangzhou, Guangdong 510280, P. R. China
| | - Xiaoya Gao
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Gongye Road 253, Guangzhou, Guangdong 510280, P. R. China
| | - Wanlin Yang
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Gongye Road 253, Guangzhou, Guangdong 510280, P. R. China
| | - Zihan Chang
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Gongye Road 253, Guangzhou, Guangdong 510280, P. R. China
| | - Xiaohua Yang
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Gongye Road 253, Guangzhou, Guangdong 510280, P. R. China
| | - Xiaobo Wei
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Gongye Road 253, Guangzhou, Guangdong 510280, P. R. China
| | - Zifeng Huang
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Gongye Road 253, Guangzhou, Guangdong 510280, P. R. China
| | - Huifang Xie
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Gongye Road 253, Guangzhou, Guangdong 510280, P. R. China
| | - Zhenyu Yue
- Department of Neurology, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, Hess Research Center Ninth Floor, New York, New York 10029, United States
| | - Fengli Zhou
- Department of Respiratory Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, P. R. China
| | - Qing Wang
- Department of Neurology, Zhujiang Hospital of Southern Medical University, Gongye Road 253, Guangzhou, Guangdong 510280, P. R. China
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Yang W, Sung K, Zhou F, Xu W, Rissman RA, Ding J, Wu C. Targeted Mutation (R100W) of the Gene Encoding NGF Leads to Deficits in the Peripheral Sensory Nervous System. Front Aging Neurosci 2018; 10:373. [PMID: 30524266 PMCID: PMC6262302 DOI: 10.3389/fnagi.2018.00373] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 10/26/2018] [Indexed: 12/25/2022] Open
Abstract
Nerve growth factor (NGF) exerts multifaceted functions through different stages of life. A missense mutation (R100W) in the beta-NGF gene was found in hereditary sensory autonomic neuropathy V (HSAN V) patients with severe loss of pain perception but without overt cognitive impairment. To better understand the pathogenesis of HSAN V, we generated the first NGFR100W knock in mouse model for HSAN V. We found that the homozygotes exhibited a postnatal lethal phenotype. A majority of homozygous pups died within the first week. Some homozygous pups could ingest more milk and survived up to 2 months by reducing litter size. Whole mount in situ hybridization using E10.5 embryos revealed that, compared to wild type, R100W mutation did not alter the gene expression patterns of TrkA and P75NTR in the homozygotes. We also found that the homozygotes displayed normal embryonic development of major organs (heart, lung, liver, kidney, and spleen). Furthermore, the homozygotes exhibited severe loss of PGP9.5-positive intra-epidermal sensory fibers. Taken together, our results suggest that, as with HSAN V patients, the R100W mutation primarily affects the peripheral sensory nervous system in the mouse model. This novel mouse model makes it possible to further study in vivo how NGFR100W uncouple trophic function from nociception of NGF.
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Affiliation(s)
- Wanlin Yang
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Kijung Sung
- Department of Neurosciences, University of California, San Diego, San Diego, CA, United States
| | - Fengli Zhou
- Department of Respiratory Medicine, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wei Xu
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Robert A. Rissman
- Department of Neurosciences, University of California, San Diego, San Diego, CA, United States
- Veterans Affairs San Diego Health Care System, San Diego, CA, United States
| | - Jianqing Ding
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chengbiao Wu
- Department of Neurosciences, University of California, San Diego, San Diego, CA, United States
- Veterans Affairs San Diego Health Care System, San Diego, CA, United States
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Hu XJ, Liu HL, Jin YX, Liang L, Zhu DM, Zhu XQ, Guo SS, Zhou FL, Yang Y. Precise label-free leukocyte subpopulation separation using hybrid acoustic-optical chip. Lab Chip 2018; 18:3405-3412. [PMID: 30357194 DOI: 10.1039/c8lc00911b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Leukocyte subpopulations contain crucial physiological information; hence, precise and specific leukocyte separation is very important for leukemia diagnosis and analysis. However, conventional centrifugation and immunofluorescence-based separation methods are inaccurate and inconvenient due to the overlapping cell size and density or complex marking processes. Herein, we report a new label-free technology for precise leukocyte subpopulation separation by synergy of acoustic and optical technologies. Standing surface acoustic wave (SSAW) solved the problem of gentle and precise focusing of cells in optical systems. In addition, SSAW was used for the separation of granulocytes, which have evident size distinction from other components. In case of lymphocytes and monocytes, which have overlap in size/density, optical force could distinguish them accurately based on the RI difference, with the convenience of acoustic pre-focusing. In this experiment, separation of three types of leukocyte subtypes with considerable throughput and purity was conducted, through which we obtained 99% pure lymphocytes, 98% pure monocytes, and 95% pure granulocytes. Experimental results prove that the device has robust ability in separating leukocyte phenotypes and have the advantages of being non-invasive, label-free and precise. In the future, this convenient hybrid method will be a potential powerful tool for auxiliary clinical diagnosis and analysis.
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Affiliation(s)
- X J Hu
- Key Laboratory of Artificial Micro and Nano Structures of Ministry of Education, School of Physics & Technology, Wuhan University, Wuhan 430072, China.
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23
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Liang L, Jin YX, Zhu XQ, Zhou FL, Yang Y. Real-time detection and monitoring of the drug resistance of single myeloid leukemia cells by diffused total internal reflection. Lab Chip 2018; 18:1422-1429. [PMID: 29713720 DOI: 10.1039/c8lc00088c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Real-time detection and monitoring of the drug resistance of single cells have important significance in clinical diagnosis and therapy. Traditional methods operate a number of times for each individual concentration, and innovation is required for the design of more simple and efficient manipulation platforms with necessary higher sensitivity. Here, we have developed a novel diffused total internal reflection (TIR) method to perform drug metabolism and cytotoxicity analysis of trapped myeloid leukemia cells. Molm-13 cells, a type of acute myeloid leukemia cell, were chosen and injected into the device and fittingly captured by cell traps. Differing from previous studies, a series of different concentrations of azelaic acid (AZA) drug could be used from 0 mM to 50 mM through convection and diffusion processes in a single chip, with each concentration region featuring 50 cells, with a total of 549 cell trapping units. Thanks to the high sensitivity of the TIR method, only cells with the same drug concentration could be illuminated in the detection process. By adjusting the incident angle, we could exactly detect and monitor the drug resistance of the cells using different drug concentrations and the experimental resolution of the drug concentration was as small as 5 mM. Images of the membrane integrity and morphology of the cells in the bright field were measured and we also monitored the cell viabilities in the dark field over 2 hours. The effects of AZA on the Molm-13 cells were explored in different concentrations at the single cell level. Compared with the results of the traditional MTT assay method, the experimental results are more simple and accurate. A cell death of 5% at an AZA concentration of 5 mM was observed after 30 minutes, while a concentration of 40 mM corresponded to a 98% cell death. The designed method in this study provides a novel toolkit to control and monitor drug resistance at the single cell level more easily with higher sensitivity and we believe it has significant potential application in single cell quality assessment and medicine analysis in clinical practice.
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Affiliation(s)
- L Liang
- School of Physics & technology, Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, Wuhan University, Wuhan 430072, China.
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Dailey GE, Reid T, White J, Chao J, Zhou FL, Paranjape S, Berhanu P. Insulin glargin 300 E/ml (Gla-300) zeigte eine verbesserte glykämische Kontrolle sowie ein niedrigeres Hypoglykämierisiko bei Typ-2-Diabetespatienten mit Reduktion der bisherigen oralen Antidiabetestherapie (OAD). DIABETOL STOFFWECHS 2018. [DOI: 10.1055/s-0038-1641928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- GE Dailey
- Scripps Whittier Diabetes Institute, San Diego, CA, United States
| | - T Reid
- Mercy Diabetes Center, Janesville, WI, United States
| | - J White
- Washington State University School of Pharmacy, Washington, WA, United States
| | - J Chao
- Xinyi, Inc., Bridgewater, NJ, United States
| | - FL Zhou
- Sanofi US, Inc., Bridgewater, NJ, United States
| | - S Paranjape
- Sanofi US, Inc., Bridgewater, NJ, United States
| | - P Berhanu
- Sanofi US, Inc., Bridgewater, NJ, United States
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25
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Zhang H, Zhou F, Jiang X, Cao M, Wang S, Zou H, Cao Y, Xian M, Liu H. Microbial production of amino acid-modified spider dragline silk protein with intensively improved mechanical properties. Prep Biochem Biotechnol 2017; 46:552-8. [PMID: 26460683 DOI: 10.1080/10826068.2015.1084637] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Spider dragline silk is a remarkably strong fiber with impressive mechanical properties, which were thought to result from the specific structures of the underlying proteins and their molecular size. In this study, silk protein 11R26 from the dragline silk protein of Nephila clavipes was used to analyze the potential effects of the special amino acids on the function of 11R26. Three protein derivatives, ZF4, ZF5, and ZF6, were obtained by site-directed mutagenesis, based on the sequence of 11R26, and among these derivatives, serine was replaced with cysteine, isoleucine, and arginine, respectively. After these were expressed and purified, the mechanical performance of the fibers derived from the four proteins was tested. Both hardness and average elastic modulus of ZF4 fiber increased 2.2 times compared with those of 11R26. The number of disulfide bonds in ZF4 protein was 4.67 times that of 11R26, which implied that disulfide bonds outside the poly-Ala region affect the mechanical properties of spider silk more efficiently. The results indicated that the mechanical performances of spider silk proteins with small molecular size can be enhanced by modification of the amino acids residues. Our research not only has shown the feasibility of large-scale production of spider silk proteins but also provides valuable information for protein rational design.
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Affiliation(s)
- Haibo Zhang
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , China
| | - Fengli Zhou
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , China
| | - Xinglin Jiang
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , China
| | - Mingle Cao
- b Department of Chemistry & Chemical Biology , University of Marburg , Marburg , Germany
| | - Shilu Wang
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , China
| | - Huibin Zou
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , China
| | - Yujin Cao
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , China
| | - Mo Xian
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , China
| | - Huizhou Liu
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , China
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Peng HX, Xu X, Yang R, Chu YM, Yang DM, Xu Y, Zhou FL, Ma WZ, Zhang XJ, Guan M, Yang ZH, Jin ZD. Molecular analysis of MLH1 variants in Chinese sporadic colorectal cancer patients. Genet Mol Res 2016; 15:gmr7689. [PMID: 27173243 DOI: 10.4238/gmr.15027689] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Single nucleotide polymorphisms (SNPs) in mismatch repair genes, especially in the MLH1 gene, are closely associated with susceptibility to hereditary nonpolyposis colorectal cancer. However, few relevant findings are available regarding the association between sporadic colorectal cancer (SCRC) and SNPs of MLH1 in Chinese patients. Therefore, the present study aimed to describe the pathogenic association between three important MLH1 polymorphisms and SCRC in the Chinese population. Peripheral blood samples from 156 SCRC patients and 311 healthy controls were collected. DNA was purified from peripheral blood, and the V384D, R217C, and I219V polymorphisms were evaluated using high-resolution melting analysis and direct sequencing. The association between the three important MLH1 polymorphisms and clinical pathological features of the SCRC patients was analyzed. In addition, PMS2-MLH1 protein interactions were determined by co-immunoprecipitation (Co-IP) to determine the protein functional alteration induced by these SNPs. Among the three polymorphisms, V384D was significantly associated with the risk of SCRC (OR = 31.36, P < 0.0001). The allele frequencies were 4.81 and 0.16% in the SCRC group. No association was found between SCRC and R217C, or between SCRC and I219V. Moreover, the allele frequency of R217C was significantly higher in the SCRC patients younger than 60 years than in those older than 60 years. Co-IP showed that the MLH1 R217C, V384D, and I219V variants had relative binding abilities with PMS2 of 0.59, 0.70, and 0.80, respectively, compared with the wild-type. These findings suggest that MLH1 V384D could be a promising genetic marker for susceptibility to SCRC.
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Affiliation(s)
- H X Peng
- Department of Gastroenterology, Changhai Hospital, The Second Military Medical University, Shanghai, China.,Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - X Xu
- Central Laboratory, Huashan Hospital, Shanghai Medical School, Fudan University, Shanghai, China
| | - R Yang
- Department of Laboratory Medicine, Jinshan Hospital, Fudan University, Shanghai, China
| | - Y M Chu
- Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - D M Yang
- Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Y Xu
- Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - F L Zhou
- Digestive Endoscopy Center, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - W Z Ma
- Central Laboratory, Huashan Hospital, Shanghai Medical School, Fudan University, Shanghai, China
| | - X J Zhang
- Central Laboratory, Huashan Hospital, Shanghai Medical School, Fudan University, Shanghai, China
| | - M Guan
- Central Laboratory, Huashan Hospital, Shanghai Medical School, Fudan University, Shanghai, China
| | - Z H Yang
- Department of Clinical Laboratory, Baoshan District Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai, China
| | - Z D Jin
- Department of Gastroenterology, Changhai Hospital, The Second Military Medical University, Shanghai, China
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Abstract
MicroRNAs regulate target gene expression and are involved in cell proliferation, apoptosis, differentiation, tumor invasion, and cancer stem cell regulation, among other processes. MicroRNA-26b (miR-26b) is closely related to tumor occurrence and development. In this study, we analyzed miR-26b expression in osteosarcoma tissue, its effect on Saos-2 osteosarcoma cell proliferation and invasion, and its relationship with 6-phosphofructo-2-kinase/fructose-2,6-biphosphatase 3 (PFKFB3) expression. Osteosarcoma tissue was obtained from surgical patients and normal tissue adjacent to the tumor was used as a control. Real-time polymerase chain reaction was applied to detect miR-26b expression in cancer tissue and normal tissue. A vector expressing miR-26b was constructed and transfected into Saos-2. An MTT assay, cell invasion assay, and scratch experiment were used to analyze the effect of miR-26b on Saos-2 cell proliferation, invasion, and migration abilities. Western blotting analysis was performed to investigate the role of miR-26b on PFKFB3 expression. miR-26b expression in normal tissue was 7.55-fold higher than in osteosarcoma tissue (t = 10.20, P = 0.006). Compared with control tissue, miR-26b significantly inhibited osteosarcoma proliferation, migration, and invasion (P < 0.05). Western blotting results revealed that PFKFB3 protein expression decreased in Saos-2 cells after transfection with miR-26b. miR-26b was down-regulated in osteosarcoma tissue. miR- 26b may inhibit osteosarcoma cell proliferation, migration, and invasion by regulating PFKFB3 protein expression. miR-26b may have a tumor suppressor role in tumor occurrence and development.
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Affiliation(s)
- W D Zheng
- Department of Orthopaedic and Trauma Surgery, Jining No.1 People's Hospital, Jining, Shandong ,China
| | - F L Zhou
- Foundation College of Jining Medical University, Jining, Shandong, China
| | - N Lin
- Foundation College of Jining Medical University, Jining, Shandong, China
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28
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Zhao C, Fu MJ, Zhou FL, Yang QB, Jiang SG, Qiu LH. Characterization and expression analysis of a cyclin B gene from black tiger shrimp (Penaeus monodon). Genet Mol Res 2015; 14:13380-90. [PMID: 26535653 DOI: 10.4238/2015.october.26.36] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The open reading frame of black tiger shrimp (Penaeus monodon) cyclin B (Pmcyclin B) was identified, based on cDNA sequence registered in GenBank (accession No. EF015590). The target sequence was 1206 bp, corresponding to 401 amino acids. Two conserved signature sequences of the cyclin B gene family were found in the Pmcyclin B deduced aa sequence. Temporal expression of Pmcyclin B in different tissues, including ovary, lymphoid organ, brain, blood, muscle, heart, gill, hepatopancreas, and intestine, were quantified by quantitative real time PCR. Messenger RNA expression levels of Pmcyclin B were greatest in the ovary, compared to other tissues (P < 0.05). Temporal expression of Pmcyclin B in the ovary at six different developmental stages was investigated by real-time PCR; no significant difference was observed (P < 0.05). Recombinant Pmcyclin B protein and its polyclonal antibody were successfully produced. Western blot analysis revealed differential expression of Pmcyclin B in ovaries in developmental stages II to IV; a positive signal (45 kDa) was observed in all ovarian stages assessed, but was most intense at stage III. Pmcyclin B protein was assessed by immunohistochemistry and was localized to the cytoplasm of prophase oocytes at stage II and enriched in the nuclei of pro-metaphase oocytes at stages III and IV. Results from this study indicate that Pmcyclin B is constitutively expressed and plays an important role in ovarian maturation in P. monodon.
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Affiliation(s)
- C Zhao
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - M J Fu
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - F L Zhou
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Q B Yang
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - S G Jiang
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - L H Qiu
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
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Zhou FL, Gao Y, Tian L, Yan FF, Chen T, Zhong L, Tian HM. Serum ferritin is associated with carotid atherosclerotic plaques but not intima-media Thickness in patients with abnormal glucose metabolism. Clin Chim Acta 2015; 450:190-5. [PMID: 26319885 DOI: 10.1016/j.cca.2015.08.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 08/06/2015] [Accepted: 08/25/2015] [Indexed: 02/05/2023]
Abstract
BACKGROUND We investigated the association between serum ferritin and carotid artery lesions in populations with abnormal glucose metabolism. METHODS We included 70 participants with abnormal glucose metabolism and 170 participants with normal glucose metabolism and measured their baseline serum ferritin levels. During follow-up carotid intima-media thickness and carotid plaque were evaluated. RESULTS Serum ferritin levels were higher in the participants with abnormal glucose metabolism (p<0.01). We further divided the patients with abnormal glucose metabolism into subgroups with and without intima-media proliferation, and found that ferritin was excluded from the final equation in the logistic regression. Furthermore, age, waist circumference, ferritin, 2h-PG, and total cholesterol were significantly different between the subgroups with and without carotid plaque. When the above data were included in a logistic regression model, the p values obtained for age, ferritin, and 2h-PG were 0.004, 0.032, and 0.011, respectively. CONCLUSIONS In the Chinese population, serum ferritin levels are significantly increased in patients with abnormal glucose metabolism. The carotid intima-media thickness showed no independent relationship with serum ferritin in patients with abnormal glucose metabolism. However, high serum ferritin is an important risk factor for carotid atherosclerosis in these patients.
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Affiliation(s)
- F L Zhou
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
| | - Y Gao
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
| | - L Tian
- Laboratory of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
| | - F F Yan
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
| | - T Chen
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
| | - L Zhong
- First People's Hospital of Longquanyi District, Chengdu 610041, Sichuan, People's Republic of China
| | - H M Tian
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China.
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Abstract
Background Protein folding structure prediction is one of the most challenging problems in the bioinformatics domain. Because of the complexity of the realistic protein structure, the simplified structure model and the computational method should be adopted in the research. The AB off-lattice model is one of the simplification models, which only considers two classes of amino acids, hydrophobic (A) residues and hydrophilic (B) residues. Results The main work of this paper is to discuss how to optimize the lowest energy configurations in 2D off-lattice model and 3D off-lattice model by using Fibonacci sequences and real protein sequences. In order to avoid falling into local minimum and faster convergence to the global minimum, we introduce a novel method (SATS) to the protein structure problem, which combines simulated annealing algorithm and tabu search algorithm. Various strategies, such as the new encoding strategy, the adaptive neighborhood generation strategy and the local adjustment strategy, are adopted successfully for high-speed searching the optimal conformation corresponds to the lowest energy of the protein sequences. Experimental results show that some of the results obtained by the improved SATS are better than those reported in previous literatures, and we can sure that the lowest energy folding state for short Fibonacci sequences have been found. Conclusions Although the off-lattice models is not very realistic, they can reflect some important characteristics of the realistic protein. It can be found that 3D off-lattice model is more like native folding structure of the realistic protein than 2D off-lattice model. In addition, compared with some previous researches, the proposed hybrid algorithm can more effectively and more quickly search the spatial folding structure of a protein chain.
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Sun H, Xing X, Li J, Zhou F, Chen Y, He Y, Li W, Wei G, Chang X, Jia J, Li Y, Xie L. Identification of gene fusions from human lung cancer mass spectrometry data. BMC Genomics 2013; 14 Suppl 8:S5. [PMID: 24564548 PMCID: PMC4042237 DOI: 10.1186/1471-2164-14-s8-s5] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background Tandem mass spectrometry (MS/MS) technology has been applied to identify proteins, as an ultimate approach to confirm the original genome annotation. To be able to identify gene fusion proteins, a special database containing peptides that cross over gene fusion breakpoints is needed. Methods It is impractical to construct a database that includes all possible fusion peptides originated from potential breakpoints. Focusing on 6259 reported and predicted gene fusion pairs from ChimerDB 2.0 and Cancer Gene Census, we for the first time created a database CanProFu that comprehensively annotates fusion peptides formed by exon-exon linkage between these pairing genes. Results Applying this database to mass spectrometry datasets of 40 human non-small cell lung cancer (NSCLC) samples and 39 normal lung samples with stringent searching criteria, we were able to identify 19 unique fusion peptides characterizing gene fusion events. Among them 11 gene fusion events were only found in NSCLC samples. And also, 4 alternative splicing events were characterized in cancerous or normal lung samples. Conclusions The database and workflow in this work can be flexibly applied to other MS/MS based human cancer experiments to detect gene fusions as potential disease biomarkers or drug targets.
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Yuan W, Huang T, Yu J, Zeng L, Lian B, He Q, Li Y, Zhang X, Zhou F, Xie L. Comparative analysis of viral protein interaction networks in Hepatitis B virus and Hepatitis C virus infected HCC. Biochim Biophys Acta 2013; 1844:271-9. [PMID: 23774196 DOI: 10.1016/j.bbapap.2013.06.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 05/09/2013] [Accepted: 06/04/2013] [Indexed: 02/07/2023]
Abstract
Previously, the different mechanisms of HBV infection and HCV infection were studied experimentally. Multiple studies also compared the differential network between HBV induced HCC and HCV induced HCC based on gene expression data. However network level comparison combining viral-human interaction network and dysfunctional protein interaction network for HBV and HCV-HCC has rarely been done before. In this work we did some pioneer job in construction of HBV/HCV viral dysfunctional network in HCC, in hope of investigating viral infection impact on the change of genome expression and eventually, the development of HCC. We found that HBx, the main HBV viral protein, directly acted on the gene groups of cell cycle, which could perfectly explain the dominant cell proliferation effect shown in the dysfunctional network of HBV-HCC. On the other hand, multiple important HCV viral proteins including CORE, NS3 and NS5A were found to target very important cancer related proteins such as TP53 and SMAD3, but no direct targeting to major immune response or inflammation related proteins. Therefore the dominant activation of immune response and inflammation related pathways shown in dysfunctional network of HCV-HCC might not be a direct effect of HCV infection. They might have been an indirect demonstration of activated cancer promoting pathways. Similar approaches may as well be applied to other important virus infection caused human diseases to help elucidate the mechanisms of virus-host interaction, and even help with investigations on anti-virus based therapies. This article is part of a Special Issue entitled: Computational Proteomics, Systems Biology & Clinical Implications.
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Affiliation(s)
- Weilan Yuan
- School of Life Sciences and Technology, Tongji University, Shanghai 200092, PR China; Shanghai Center for Bioinformation Technology, Shanghai 201203, PR China.
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Zhou F, Bi X, Zhang T, Huang J. [Study of the antitumor activity of alveolar macrophages after transfected human INF-γ gene]. Zhongguo Fei Ai Za Zhi 2011; 14:452-5. [PMID: 21569654 PMCID: PMC6000334 DOI: 10.3779/j.issn.1009-3419.2011.05.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
背景与目的 活化的肺泡巨噬细胞(alveolar macrophage, AM)具有抗肿瘤功能,γ干扰素(interferon-γ, INF-γ)是巨噬细胞的活化因子之一,其与巨噬细胞体外共同培养可增强巨噬细胞的免疫功能。本研究旨在了解人INF-γ基因体外转染肺癌患者的AM后对其抗肿瘤功能的影响。 方法 经肺泡灌洗获AM,分离纯化,以INF-γ基因转染AM,以RT-PCR方法和ELISA方法检测人INF-γ基因的成功转染;分别检测AM产生TNF-α、NO、IL-1的水平及AM杀伤L1210细胞的活性。 结果 RT-PCR方法和ELISA方法均显示人INF-γ基因已成功转染AM;经人INF-γ基因转染后,肺癌患者AM产生TNF-α、NO、IL-1的水平较对照组明显升高(P < 0.05);AM杀伤L1210细胞的活性较对照组明显增强(P < 0.05)。 结论 INF-γ基因体外转染肺癌患者的AM,能使AM的抗肿瘤活性明显增强。
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Affiliation(s)
- Fengli Zhou
- Department of Respiratory Medicine, the Third Afiliated Hospital, Zhongshan University, Guangzhou 510630, China.
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Liu DY, Zhou FL, Hu ZJ, Hu HB. [Value of detecting p16 gene methylation in the diagnosis of malignant pleural effusion]. Nan Fang Yi Ke Da Xue Xue Bao 2010; 30:2148-2150. [PMID: 20855275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
OBJECTIVE To investigate aberrant methylation in the promoter of p16 gene in the sediment cells of pleural effusion and evaluate its clinical significance in the differentiating benign and malignant pleural effusion. METHODS Using methylation-specific PCR (MSP), aberrant promoter methylation of p16 gene was detected in the sedimental cells of pleural effusion samples from 66 patients with pleural effusion. RESULTS Of the 66 patients with pleural effusion, 36 had a definite diagnosis of malignant pleural effusion, and the rest were confirmed to have benign pleural effusion. The positivity rate of p16 gene promoter methylation was 69.4% (25/36) in malignant pleural effusion and 13.3% (4/30) in benign pleural effusion specimens, showing a significant difference between them (χ² = 20.915, P < 0.01). The diagnostic sensitivity, specificity and accuracy of aberrant promoter methylation of p16 gene in the 36 malignant cases were 69.4%, 86.7% and 77.3%, respectively. The positive expression of p16 gene promoter methylation in malignant pleural effusion was not correlated to the histological type or the pathological grade of the tumor (P > 0.05). CONCLUSION Detection of aberrant methylation in p16 gene promoter in the sediment cells of pleural effusion specimens by MSP method allows differentiation between benign and malignant pleural effusion.
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Affiliation(s)
- Da-ying Liu
- Department of Respiratory Diseases, Liutie Central Hospital, Liuzhou 545007, China.
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Wu BQ, Shi YF, Huang J, Liu H, Zhang WX, Zhou FL, Zhang TT. [The effect of recombinant panton-valentine leukocidin on the production of cytokines by human alveolar macrophages]. Zhonghua Jie He He Hu Xi Za Zhi 2009; 32:503-507. [PMID: 19954003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE To investigate the effect of recombinant panton-valentine leukocidin (rPVL) on the regulation of human alveolar macrophage CD14 and IL-10 and TNF-alpha. METHODS Human alveolar macrophages (AM) were purified and cultured from bronchoalveolar lavage fluid. Each sample was divided into groups according to different concentrations and exposure times of rPVL. Semi-quantitative RT-PCR was used to evaluate the CD14 mRNA levels and Double-antibody-sandwich-ELISA was used to measure the IL-10 and TNF-alpha levels in AM cultures. RESULTS CD14 mRNA decreased after rPVL treatment in time-and concentration dependent manners. There were no statistically significant differences in CD14 mRNA among the blank control groups (F = 1.708, P > 0.05). CD14 mRNA in the T6N10 group and the T6N100 group( T = time in hours, N = concentration of rPVL/nmol/L) decreased as compared to the T6N0 group (t = 4.132, 6.818, both P < 0.001), and that in the T24N10 group and the T24N100 group also decreased as compared to the T24N0 group (t = 7.401, 11.415, both P < 0.001), indicating that the expression of CD14 was downregulated by rPVL treatment. There were also statistically significant differences in CD14 mRNA between T6N10 and T24N10 groups, T6N100 and T24N100 groups (t = 4.692, 6.019, both P < 0.001), T6N10 and T6N100 groups, T24N10 and T24N100 groups (t = 2.686, 4.014, P < 0.01 respectively), indicating that the expression of CD14 decreased as the treatment time and the concentration of rPVL increased. The IL-10 concentrations of the T24N10 and T24N100 groups increased as compared to the T24N0 group (t = 4.036, 3.941, both P < 0.01) in time-dependent and concentration-dependent manners with rPVL treatment. The TNF-alpha concentration of the T24N10 group decreased while that of the T24N100 group increased as compared to the T24N0 group (t = 2. 824, 8. 468, both P < 0.01, respectively), indicating that a lower concentration of rPVL inhibited TNF-alpha release while a higher concentration of rPVL induced release of TNF-alpha. CONCLUSION The results suggest that rPVL could reduce the expression of CD14 and induce disordered release of anti-inflammatory and proinflammatory cytokines by AMs, which may be one of the important mechanisms underlying the high mortality of infection with PVL-positive Staphylococcus aureus.
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Affiliation(s)
- Ben-quan Wu
- Department of Respiratory Medicine, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China
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Wu ST, Yang ZZ, Zhou FL. [Reconstruction of heel by reversed island fibular musculocutaneous flap]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2001; 15:211-3. [PMID: 11488026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
OBJECTIVE To explore the anatomical basis of blood supply and heel reconstruction by reversed island fibular musculocutaneous flap. METHODS The blood supply of fibular musculocutaneous flap and the biomechanical characteristics of heel were studied by anatomical examination. One case with right heel full defect because of explosion injury was repaired by transfer of reversed island fibular vessels. The fibular flap was 14 cm in length with part of peroneus muscle and long flexor muscle of great toe. RESULTS The lower part of fibular artery had plentiful anastomosis with anterior tibial artery and posterior tibial artery, which could provide ideal reversed blood supply. The rotatory point of vessel pedicle could be chosen according to the need of operation. The lowest site might be above 6 cm to lateral malleolus, and the vessel pedicle was 20 cm in length. The morphological feature of the reversed island fibular musculocutaneous flap was suitable to the biomechanical character of heel. The patient achieved satisfactory clinical result, the musculocutaneous flap survived well for 10 months of follow-up. CONCLUSION The reversed island fibular musculocutaneous flap provide a new method for repairing the severe heel defect, especially in full defect of calcaneus and cuboid bone.
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Affiliation(s)
- S T Wu
- Department of Orthopedic Surgery, Chinese Medical Hospital of Changning City, Changning Hunan, P. R. China 412500
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Cai ST, Zhou FL, Zhang JZ. [Immunogold labeling electron microscopy showing vimentin filament anchored on nuclear pore complex]. Shi Yan Sheng Wu Xue Bao 1997; 30:193-9. [PMID: 11039028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
The relationship between intermediate filament and nucleus is an important question to be solved. By combining sequential cell fractionation with immunoblotting, we showed that the intermediate filament protein in turkey erythrocyte is vimentin. Using pre-embedment immunogold labeling techniques together with sequential cell fractionation, we showed that cytoplasmic intermediate filaments in turkey erythrocyte are labeled specifically by rabbit anti-vimentin antibody-protein A-gold. Moreover, we showed that the cytoplasmic filaments anchored on nuclear pore complex were also labeled by rabbit anti-vimentin antibody-protein A-gold specifically. Our results demonstrated that cytoplasmic filaments anchored on nuclear pore complex was vimentin filament. The experiments indicated that vimentin filament may be anchored on nuclear pore complex by binding with Nup 180 and intermediate filament may be involved in nuclear transportation.
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Affiliation(s)
- S T Cai
- Institute of Biophysics Academia Sinica, Beijing
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Cai ST, Zhou FL, Zhang JZ. [Vimentin and Nup 180 in vitro binding assay]. Shi Yan Sheng Wu Xue Bao 1996; 29:357-63. [PMID: 9772680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
In order to investigate relationship between vimentin and nuclear pore complex, we examined binding ability of vimentin, expressed in E. coli, with nucleoporin, isolated from rat liver nuclei, in vitro. Negative staining electron microscopy showed that the vimentin expressed in bacteria assembled 10 nm filament in vitro. SDS-PAGE and western blotting showed that Nup 180 bind to vimentin in binding assay in vitro. Combining immunogold labeling and negative staining electron microscopy techniques, we showed that Nup 180 bind on the 10 nm vimentin filaments. The experiment results indicated that vimentin filament may be anchored on nuclear pore complex in vivo by binding with Nup 180.
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Affiliation(s)
- S T Cai
- Institute of Biophysics, Academia Sinica, Beijing
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Zhou FL, Burnouf-Radosevich M, Burnouf T. Purification of factor VIII/von Willebrand factor from human plasma on immobilized lentil lectin. Protein Expr Purif 1994; 5:138-43. [PMID: 8054845 DOI: 10.1006/prep.1994.1021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Human factor VIII/von Willebrand factor (FVIII/vWF) was shown to bind to immobilized lectins from Arachis, Ulex, Concanavalia, and Lens species. The protein/lectin interaction displayed higher affinities for the lectins from the last two species. However, the Lens culinaris lectin immobilized on Sepharose 4B (LCA-Sepharose) provided a more selective and flexible affinity system for the purification of FVIII/vWF than Concanavalia lectin. Chromatography on LCA-Sepharose of a purified FVIII containing a small proportion of vWF required a weak acidic medium (pH 6.3) and relatively slow kinetics (about 20 cm/h flow rate). The bound FVIII was specifically dissociated from LCA-Sepharose by methyl-alpha-D-mannopyranoside, and to a lesser extent by other monosaccharides such as D-glucose, methyl-alpha-D-glucopyranoside, D-mannose, and D-galactose. Application to whole plasma resulted in a capacity for FVIII/vWF of about 28 U/ml gel. Specific activities for eluted FVIII and vWF were 3 and 2.2 IU/mg protein, respectively, with respective FVIII:c and vWF:RCo recoveries of 57 and 40% from starting plasma. Coagulation factors II, X, VII, IX, V, and XI and fibrinogen were eliminated in the LCA matrix breakthrough fraction, improving the stability of the purified FVIII molecule. Purity of the LCA eluate was further enhanced by ion-exchange chromatography on DEAE-Fractogel TSK 650 M which reduced the amount of protein contaminants and provided a FVIII/vWF fraction with higher specific activity (45-80 IU/mg protein depending on the chromatographic conditions). The overall process yield was 45 and 25% for FVIII:c and vWF:RCo, respectively.
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Affiliation(s)
- F L Zhou
- Centre Régional de Transfusion Sanguine de Lille, France
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Zhou FL, Kan D. [Activation of human serum complement with inulin and purification of SC5b-9]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1991; 13:293-7. [PMID: 1839526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
During a study of the effect of inulin on human complement, we found that complements were partially activated after incubation with inulin for one hour and completely activated after incubation for three hours at 37 degrees C. SC5b-9 was purified by DEAE-Sephacel chromatography, linear sucrose density gradients centrifugation and anti-IgM-protein A affinity chromatography. Purified SC5b-9, as assayed by immunoelectrophoresis, was a single fraction and had C5b, C6, C7/C8 alpha gamma, C8 beta, C9, C92, and S-protein bands appearing in the 10% SDS-PAGE.
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Affiliation(s)
- F L Zhou
- Institute of Basic Medical Sciences
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41
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Zhang Y, Zhou FL. [Homologous species restriction in the complement mediated cytolysis and its mechanism]. Sheng Li Ke Xue Jin Zhan 1991; 22:231-4. [PMID: 1947984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Sinniger V, Tapon-Bretaudière J, Zhou FL, Bros A, Muller D, Jozefonvicz J, Fischer AM. Immobilization of dermatan sulphate on a silica matrix and its possible use as an affinity chromatography support for heparin cofactor II purification. J Chromatogr A 1991; 539:289-96. [PMID: 1646210 DOI: 10.1016/s0021-9673(01)83937-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Dermatan sulphate (DS) is a glycosaminoglycan which catalyses specifically thrombin inhibition by a plasmatic inhibitor, Heparin cofactor II (HCII). DS was insolubilized on a silica matrix to study its interaction with HCII. The immobilization of DS was performed with a good yield on a silica previously coated with polysaccharides in order to neutralize the negatively charged silanol groups. The value of the affinity constant of insolubilized DS for HCII, measured by the adsorption isotherm, is consistent with the value obtained for soluble DS. The DS bound to the silica matrix was also tested as a chromatographic support for the purification of HCII from human plasma; the optimum conditions for HCII adsorption and desorption were determined. The eluted HCII was obtained with a good yield (21%) and with no contamination by antithrombin III, the other main plasmatic inhibitor of thrombin.
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Affiliation(s)
- V Sinniger
- Laboratoire d'Hématologie, C.H.U. Necker-Enfants Malades, Paris, France
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Jacquot-Dourges MA, Zhou FL, Muller D, Jozefonvicz J. Affinity chromatography of fibroblast growth factors on coated silica supports grafted with heparin. J Chromatogr A 1991; 539:417-24. [PMID: 1646211 DOI: 10.1016/s0021-9673(01)83950-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Dextran-coated silica beads are excellent supports for affinity chromatography of proteins. They can be easily grafted using conventional coupling methods with different active ligands, such as heparin. Fibroblast growth factors develop specific interactions with heparin through well-defined amino acids sequences. The heparin-dextran coated silica phases exhibit an affinity for these growth factors. Under our experimental conditions, the basic form can be absorbed on the solid support at a moderate salt concentration (0.5 M sodium chloride) and can be selectively desorbed by increasing the ionic strength of the eluent. The purification performances of such phases are compared to those obtained on the heparin grafted soft gels. Because of their mechanical properties, the dextran-coated silica supports were also used in high-performance affinity chromatography to purify fibroblast growth factors from a bovine brain crude extract.
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Abstract
In order to prepare easily derivatizable supports for high-performance affinity chromatography (HPAC), the advantages of traditional polysaccharide-based supports were combined with the excellent mechanical properties of silica by coating the porous silica beads with a double layer of polysaccharide. The starting material was preliminarily impregnated with dextran or agarose, substituted with a calculated amount of positively charged diethylaminoethyl (DEAE) functions, in order to neutralize the cation-exchange capacity. These silica beads were then recoated by a second coupling with a native dextran or agarose so the DEAE functions introduced by the first coating could be overlayed and the coating state of the silica beads was further improved. The passivation of silica was confirmed by eluting standard proteins on the double-coated silica supports in high-performance size-exclusion chromatography. The elution of an acidic biopolymer, heparin, on different coated silica supports under gradient conditions demonstrated the major improvement of the native polymeric overlayer on the ionic properties of the support. These double-coated silica supports can also easily be activated by classical activation methods and coupled with active ligands (protein A and heparin). The active supports grafted by protein A were used in HPAC of human immunoglobulin G. The double-coated silica supports grafted by heparin were used in HPAC of human alpha-thrombin and human antithrombin III and for the purification of bovine thrombin from a commercial crude thrombin preparation.
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Affiliation(s)
- F L Zhou
- L.R.M. CNRS URA 502, Université Paris-Nord, Villetaneuse, France
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Zhou FL, Sargent III, Koch SW, Chow WW. Population pulsations and sidemode generation in semiconductors. Phys Rev A 1990; 41:463-474. [PMID: 9902889 DOI: 10.1103/physreva.41.463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Abstract
Polymer-coated silica supports are potentially good stationary phases for high-performance affinity chromatographic separations of proteins. Silica beads have been coated with a polysaccharide (dextran or agarose), substituted by a calculated amount of positively charged diethylaminoethyl functions in order to neutralize the negatively charged silanol groups of silica and to facilitate the formation of a hydrophilic polymeric layer on the inorganic surface. The silica-based supports were prepared in two steps. First, the silica was impregnated with a solution of diethylaminoethylated polymer, and then the coating polymer was crosslinked in order to avoid leakage of the polymeric layer. The supports present minimal non-specific interactions with proteins, as tested by high-performance size-exclusion chromatography. These coated silica supports were coupled with active ligands, such as protein A, concanavalin A and heparin, by conventional coupling methods. The resulting affinity stationary phases were tested by the elution of proteins in order to study their performance in high-performance affinity chromatography.
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Affiliation(s)
- F L Zhou
- L.R.M. CNRS UA502, University Paris-Nord, Villetaneuse, France
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Zhang ZN, Pan HZ, Huang WX, Zhou FL, Feng LM, Li CH, Fang ZY, Xiong F, Hong T, Zhang A. Observations on red cell membrane of paroxysmal nocturnal hemoglobinuria. Chin Med J (Engl) 1981; 94:207-12. [PMID: 6790235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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Zhang ZN, Huang WX, Zhang A, Pan HZ, Zhou FL, Feng LM. [The modified cobra venom factor hemolysis test and its clinical application (author's transl)]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1979; 1:57-61. [PMID: 262812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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