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Qiu LW, Liu YF, Cao XQ, Wang Y, Cui XH, Ye X, Huang SW, Xie HJ, Zhang HJ. Annexin A2 promotion of hepatocellular carcinoma tumorigenesis via the immune microenvironment. World J Gastroenterol 2020; 26:2126-2137. [PMID: 32476780 PMCID: PMC7235202 DOI: 10.3748/wjg.v26.i18.2126] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 04/08/2020] [Accepted: 04/20/2020] [Indexed: 02/06/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is the most common primary liver cancer with a dismal prognosis, especially when diagnosed at advanced stages. Annexin A2 (ANXA2), is found to promote cancer progression and therapeutic resistance. However, the underlining mechanisms of ANXA2 in immune escape of HCC remain poorly understood up to now. Herein, we summarized the molecular function of ANXA2 in HCC and its relationship with prognosis. Furthermore, we tentatively elucidated the underlying mechanism of ANXA2 immune escape of HCC by upregulating the proportion of regulatory T cells and the expression of several inhibitory molecules, and by downregulating the proportion of natural killer cells and dendritic cells and the expression of several inhibitory molecules or effector molecules. We expect a lot of in-depth studies to further reveal the underlying mechanism of ANXA2 in immune escape of HCC in the future.
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Affiliation(s)
- Li-Wei Qiu
- Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu Province, China
| | - Yi-Fei Liu
- Department of Pathology, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu Province, China
| | - Xiao-Qing Cao
- Department of Thoracic Surgery, Beijing Chest Hospital, Capital Medical University (Beijing Tuberculosis and Thoracic Tumor Research Institute), Beijing 101149, China
| | - Yan Wang
- Emergency Department, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu Province, China
| | - Xiao-Hong Cui
- Department of General Surgery, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - Xian Ye
- Medical School of Nantong University, Nantong 226001, Jiangsu Province, China
| | - Shuo-Wen Huang
- Medical School of Nantong University, Nantong 226001, Jiangsu Province, China
| | - Hong-Jun Xie
- Medical School of Nantong University, Nantong 226001, Jiangsu Province, China
| | - Hai-Jian Zhang
- Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu Province, China
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López-Rodríguez JC, Martínez-Carmona FJ, Rodríguez-Crespo I, Lizarbe MA, Turnay J. Molecular dissection of the membrane aggregation mechanisms induced by monomeric annexin A2. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2018; 1865:863-873. [DOI: 10.1016/j.bbamcr.2018.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 03/13/2018] [Accepted: 03/14/2018] [Indexed: 01/15/2023]
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3
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Ashraf S, Cheng J, Zhao X. Clumping factor A of Staphylococcus aureus interacts with AnnexinA2 on mammary epithelial cells. Sci Rep 2017; 7:40608. [PMID: 28102235 PMCID: PMC5244385 DOI: 10.1038/srep40608] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 12/07/2016] [Indexed: 01/08/2023] Open
Abstract
Staphylococcus aureus is one of major pathogens that can cause a series of diseases in different hosts. In the bovine, it mainly causes subclinical and contagious mastitis, but its mechanisms of infection are not fully understood. Considering the fact that virulence factors play key roles in interactions between the bacterium and host cells, this study aimed to identify if a binding partner of S. aureus clumping factor A (ClfA) exists on the bovine mammary epithelial cells. The ClfA protein was used as a bait to pull down lysates of cultured bovine mammary epithelial cells (MAC-T cells). One pull-down protein was identified through use of mass spectrometry and bioinformatics analyses as bovine AnnexinA2. The Western blot and in vitro binding assay confirmed that the full A domain of ClfA was necessary to bind to AnnexinA2. In addition, the interaction between ClfA and AnnexinA2 was validated biochemically by ELISA with a KD value of 418+/−93 nM. The confocal microscopy demonstrated that ClfA and AnnexinA2 partially co-localized in the plasma membrane and that the majority of them were transported into cytoplasm. Taken together, the results demonstrate that ClfA binds with AnnexinA2 and this interaction could mediate S. aureus invasion into bovine mammary epithelial cells.
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Affiliation(s)
- Shoaib Ashraf
- Department of Animal Science, McGill University, 21,111 Lakeshore Road Sainte-Anne-de-Bellevue, H9X3V9, Quebec, Canada
| | - Jing Cheng
- Department of Animal Science, McGill University, 21,111 Lakeshore Road Sainte-Anne-de-Bellevue, H9X3V9, Quebec, Canada
| | - Xin Zhao
- Department of Animal Science, McGill University, 21,111 Lakeshore Road Sainte-Anne-de-Bellevue, H9X3V9, Quebec, Canada
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Liu J, Fu R, Liu R, Zhao G, Zheng M, Cui H, Li Q, Song J, Wang J, Wen J. Protein Profiles for Muscle Development and Intramuscular Fat Accumulation at Different Post-Hatching Ages in Chickens. PLoS One 2016; 11:e0159722. [PMID: 27508388 PMCID: PMC4980056 DOI: 10.1371/journal.pone.0159722] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 06/10/2016] [Indexed: 02/06/2023] Open
Abstract
Muscle development and growth influences the efficiency of poultry meat production, and is closely related to deposition of intramuscular fat (IMF), which is crucial in meat quality. To clarify the molecular mechanisms underlying muscle development and IMF deposition in chickens, protein expression profiles were examined in the breast muscle of Beijing-You chickens at ages 1, 56, 98 and 140 days, using isobaric tags for relative and absolute quantification (iTRAQ). Two hundred and four of 494 proteins were expressed differentially. The expression profile at day 1 differed greatly from those at day 56, 98 and 140. KEGG pathway analysis of differential protein expression from pair-wise comparisons (day 1 vs. 56; 56 vs. 98; 98 vs. 140), showed that the fatty acid degradation pathway was more active during the stage from day 1 to 56 than at other periods. This was consistent with the change in IMF content, which was highest at day 1 and declined dramatically thereafter. When muscle growth was most rapid (days 56-98), pathways involved in muscle development were dominant, including hypertrophic cardiomyopathy, dilated cardiomyopathy, cardiac muscle contraction, tight junctions and focal adhesion. In contrast with hatchlings, the fatty acid degradation pathway was downregulated from day 98 to 140, which was consistent with the period for IMF deposition following rapid muscle growth. Changes in some key specific proteins, including fast skeletal muscle troponin T isoform, aldehyde dehydrogenase 1A1 and apolipoprotein A1, were verified by Western blotting, and could be potential biomarkers for IMF deposition in chickens. Protein-protein interaction networks showed that ribosome-related functional modules were clustered in all three stages. However, the functional module involved in the metabolic pathway was only clustered in the first stage (day 1 vs. 56). This study improves our understanding of the molecular mechanisms underlying muscle development and IMF deposition in chickens.
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Affiliation(s)
- Jie Liu
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Ruiqi Fu
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Ranran Liu
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Guiping Zhao
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Maiqing Zheng
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Huanxian Cui
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Qinghe Li
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Jiao Song
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Jie Wang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Jie Wen
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
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5
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Pezzini J, Joucla G, Gantier R, Toueille M, Lomenech AM, Le Sénéchal C, Garbay B, Santarelli X, Cabanne C. Antibody capture by mixed-mode chromatography: A comprehensive study from determination of optimal purification conditions to identification of contaminating host cell proteins. J Chromatogr A 2011; 1218:8197-208. [DOI: 10.1016/j.chroma.2011.09.036] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 09/08/2011] [Accepted: 09/14/2011] [Indexed: 10/17/2022]
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Differential proteome analysis of bone marrow mesenchymal stem cells from adolescent idiopathic scoliosis patients. PLoS One 2011; 6:e18834. [PMID: 21526124 PMCID: PMC3081308 DOI: 10.1371/journal.pone.0018834] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Accepted: 03/11/2011] [Indexed: 12/20/2022] Open
Abstract
Adolescent idiopathic scoliosis (AIS) is a complex three-dimensional deformity of the spine. The cause and pathogenesis of scoliosis and the accompanying generalized osteopenia remain unclear despite decades of extensive research. In this study, we utilized two-dimensional fluorescence difference gel electrophoresis (2D-DIGE) coupled with mass spectrometry (MS) to analyze the differential proteome of bone marrow mesenchymal stem cells (BM-MSCs) from AIS patients. In total, 41 significantly altered protein spots were detected, of which 34 spots were identified by MALDI-TOF/TOF analysis and found to represent 25 distinct gene products. Among these proteins, five related to bone growth and development, including pyruvate kinase M2, annexin A2, heat shock 27 kDa protein, γ-actin, and β-actin, were found to be dysregulated and therefore selected for further validation by Western blot analysis. At the protein level, our results supported the previous hypothesis that decreased osteogenic differentiation ability of MSCs is one of the mechanisms leading to osteopenia in AIS. In summary, we analyzed the differential BM-MSCs proteome of AIS patients for the first time, which may help to elucidate the underlying molecular mechanisms of bone loss in AIS and also increase understanding of the etiology and pathogenesis of AIS.
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Liu A, Liu D, Zhao S, Zheng J, Cao D, Zhang H. Up regulation of annexin A2 on murine H22 hepatocarcinoma cells induced by cartilage polysaccharide. Cancer Epidemiol 2010; 35:490-6. [PMID: 21111695 DOI: 10.1016/j.canep.2010.10.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Revised: 10/16/2010] [Accepted: 10/22/2010] [Indexed: 02/08/2023]
Abstract
In this study, we investigated the antitumor effect of a tumor vaccine prepared from H22 hepatocarcinoma cells induced by cartilage polysaccharide. We found out there were specific antigens which combined with antigen-specific antibodies from immune murine serum. Results of western blot analysis showed that about 36 kDa make specific antibodies appeared specific antibodies in antiserum of immune mice, whereas the best immune effects became visible at the induction time of 48 h. Analyses of 2-dimensional electrophoresis identified the specific antigen was annexin A2, which was a glycosylated protein that contained a glycosylation site, closely related to oncogenesis, cancer development, invasion and metastasis. Proteomics indicated that both quantity and conformation of annexin A2 were changed after induced by cartilage polysaccharide. Lastly, we found there was a major increase of annexin A2 mRNA on H22 cells induced by cartilage polysaccharide. In summary, our data suggested that annexin A2, a specific antigen played a key role in antitumor immune response and activating the immune system. It would be a potential type of tumor vaccine which provided new ideas for tumor immunoprophylaxis.
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Affiliation(s)
- Anjun Liu
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin, China.
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8
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Yi W, Sun Y, Wei X, Gu C, Dong X, Kang X, Guo S, Dou K. Proteomic profiling of human bone marrow mesenchymal stem cells under shear stress. Mol Cell Biochem 2010; 341:9-16. [PMID: 20407807 DOI: 10.1007/s11010-010-0432-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Accepted: 02/26/2010] [Indexed: 12/11/2022]
Abstract
Mesenchymal stem cells (MSCs) are promising seed cells for tissue engineering of blood vessels. As seed cells, MSCs must endure blood fluid shear stress after transplantation. It has been shown that fluid shear stress can regulate the proliferation and differentiation of MSCs. However, the effects of fluid shear stress on MSCs including the types of proteins modulated are still not well understood. In this study, we exposed human mesenchymal stem cells (HMSCs) to 3 dyn/cm(2) shear stress for 6 h and compared them to a control group using proteomic analysis. Thirteen specific proteins were affected by shear stress, 10 of which were up-regulated. Shear stress especially induced sustained increases in the expression of Annexin A2 and GAPDH, which have been specifically shown to affect HMSCs function. We present here the first comparative proteome analysis of effect of shear stress on HMSCs.
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Affiliation(s)
- Wei Yi
- Department of Hepatobiliary Surgery, Xijing Hospital, 4th Military Medical University, 127 Changle West Road, Xi'an 710032, Shaanxi, People's Republic of China
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9
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Vats K, Knutson K, Hinderliter A, Sheets ED. Peripheral protein organization and its influence on lipid diffusion in biomimetic membranes. ACS Chem Biol 2010; 5:393-403. [PMID: 20175560 PMCID: PMC2855781 DOI: 10.1021/cb900303s] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Protein organization on biomembranes and their dynamics are essential for cellular function. It is not clear, however, how protein binding may influence the assembly of underlying lipids or how the membrane structure leads to functional protein organization. Toward this goal, we investigated the effects of annexin a5 binding to biomimetic membranes using fluorescence imaging and correlation spectroscopy. Annexin a5 (anx a5), a peripheral intracellular protein that plays a membrane remodeling role in addition to other functions, binds specifically and tightly to anionic (e.g., phosphatidylserine)-containing membranes in the presence of calcium ion. Our fluorescence microscopy reveals that annexin likely forms assemblies, along with a more dispersed population, upon binding to anionic biomembranes in the presence of calcium ion, which is reflected in its two-component Brownian motion. To investigate the effects of annexin binding on the underlying lipids, we used specific acyl chain labeled phospholipid analogues, NBD-phosphatidylcholine (NBD-PC) and NBD-phosphatidylserine (NBD-PS). We find that both NBD-labeled lipids cluster under anx a5 assemblies, as compared with when they are found under the dispersed annexin population, and NBD-PS exhibits two-component lateral diffusion under the annexin assemblies. In contrast, NBD-PC diffusion is slower by an order of magnitude under the annexin assemblies in contrast to its diffusion when not localized under anx a5 assemblies. Our results indicate that, upon binding to membranes, the peripheral protein annexin organizes the underlying lipids into domains, which may have functional implications in vivo.
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Affiliation(s)
- Kanika Vats
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802
| | - Kristofer Knutson
- Department of Chemistry & Biochemistry, University of Minnesota, Duluth, MN 55812
| | - Anne Hinderliter
- Department of Chemistry & Biochemistry, University of Minnesota, Duluth, MN 55812
| | - Erin D. Sheets
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802
- Department of Pharmacy Practice & Pharmaceutical Sciences, College of Pharmacy, University of Minnesota, Duluth, MN 55812
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Richardson BM, Heesom KJ, Parsons SF, Anstee DJ, Frayne J. Analysis of the differential proteome of human erythroblasts duringin vitroerythropoiesis by 2-D DIGE. Proteomics Clin Appl 2009; 3:1123-34. [DOI: 10.1002/prca.200900013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2009] [Revised: 05/07/2009] [Accepted: 05/27/2009] [Indexed: 11/08/2022]
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11
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Farnesol, a fungal quorum-sensing molecule triggers apoptosis in human oral squamous carcinoma cells. Neoplasia 2009; 10:954-63. [PMID: 18714396 DOI: 10.1593/neo.08444] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2008] [Revised: 06/06/2008] [Accepted: 06/08/2008] [Indexed: 12/13/2022] Open
Abstract
Farnesol is a catabolite within the isoprenoid/cholesterol pathway that has exhibited significant antitumor activity. Farnesol was recently identified as a quorum-sensing molecule produced by the fungal pathogen Candida albicans. In this study, we hypothesize that synthetic and Candida-produced farnesol can induce apoptosis in vitro in oral squamous cell carcinoma (OSCC) lines. Cell proliferation, apoptosis, mitochondrial degradation, and survivin and caspase expressions were examined. In addition, global protein expression profiles were analyzed using proteomic analysis. Results demonstrated significant decrease in proliferation and increase in apoptosis in cells exposed to farnesol and C. albicans culture media. Concurrently, protein expression analysis demonstrated a significant decrease in survivin and an increase in cleaved-caspase expression, whereas fluorescent microscopy revealed the presence of active caspases with mitochondrial degradation in exposed cells. A total of 36 differentially expressed proteins were identified by proteomic analysis. Among the 26 up-regulated proteins were those involved in the inhibition of carcinogenesis, proliferation suppression, and aging. Most notable among the 10 down-regulated proteins were those involved in the inhibition of apoptosis and proteins overexpressed in epithelial carcinomas. This study demonstrates that farnesol significantly inhibits the proliferation of OSCCs and promotes apoptosis in vitro through both the intrinsic and extrinsic apoptotic signaling pathways. In addition, we report for the first time the ability of Candida-produced farnesol to induce a similar apoptotic response through the same pathways. The capability of farnesol to trigger apoptosis in cancer cells makes it a potential tool for studying tumor progression and an attractive candidate as a therapeutic agent.
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12
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RNA interference of interferon regulatory factor-1 gene expression in THP-1 cell line leads to Toll-like receptor-4 overexpression/activation as well as up-modulation of annexin-II. Neoplasia 2008; 9:1012-20. [PMID: 18084608 DOI: 10.1593/neo.07640] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2007] [Revised: 10/08/2007] [Accepted: 10/09/2007] [Indexed: 01/17/2023] Open
Abstract
Interferon regulatory factor-1 (IRF-1) is a candidate transcription factor for the regulation of the Toll-like receptor-4 (TLR-4) gene. Using a small interfering RNA-based (siRNA) process to silence IRF-1 gene expression in the leukemic monocytic cell line THP-1, we investigated whether such a modulation would alter TLR-4 expression and activation status in these cells. The siIRF-1 cells expressed elevated levels of TLR-4 mRNA and protein compared to controls by 90% and 77%, respectively. ICAM.1 protein expression and apoptosis levels were increased by 8.35- and 4.25-fold, respectively. The siIRF-1 cells overexpressed Bax mRNA compared to controls. Proteomic analysis revealed upmodulation of the Annexin-II protein in siIRF-1 THP-1 cells. Myelodysplastic syndrome (MDS) patients with an absence of full-length IRF-1 mRNA also overexpressed Annexin-II. It is plausible that this overexpression may lead to the activation of TLR-4 contributing to the increased apoptosis characterizing MDS.
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13
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Qiu J, Gao HQ, Zhou RH, Liang Y, Zhang XH, Wang XP, You BA, Cheng M. Proteomics analysis of the proliferative effect of low-dose ouabain on human endothelial cells. Biol Pharm Bull 2007; 30:247-53. [PMID: 17268060 DOI: 10.1248/bpb.30.247] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Digitalis has been used to treat congestive heart failure for more than 200 years, although the dual effects (proliferation and death) induced by digitalis on cell growth have been known for many years, the mechanisms by which digitalis causes the actions were not completely known. The aim of this work was to characterize the proliferative effect of ouabain on cell growth in endothelial cells, and, to do the differential proteomic analysis of human umbilical vein endothelial cells (HUVEC) in response to ouabain and examine changes in protein expression. HUVEC were exposed to different concentrations (0.1-100 nM) of ouabain at 12-48 h intervals. Cell growth and morphological changes of HUVEC treated with ouabain were compared with cells under nontreated conditions. Ouabain stimulated HUVEC cell proliferation at low concentrations and induced cell death at higher concentrations. Using proteomics study, we identified 32 proteins of HUVEC with various important cellular functions and revealed 8 proteins such as Annexin A1, Annexin A2, Malate dehydrogenase, Myosin regulatory light chain 2 (MRLC2), Profilin-1, S100 calcium-binding protein A13, Triosephosphate isomerase and Translationally controlled tumor protein, regulated by low-dose ouabain treatment and MRLC2 was subsequently confirmed by Western blot. Our results give new insights into the cellular and molecular mechanisms of the proliferation action of low-dose ouabain on HUVEC and provide new avenues for the treatment of cardiovascular diseases.
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Affiliation(s)
- Jie Qiu
- Department of Geriatrics, Shandong University Qilu Hospital, Jinan, China
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14
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Elegbede AI, Srivastava DK, Hinderliter A. Purification of recombinant annexins without the use of phospholipids. Protein Expr Purif 2006; 50:157-62. [PMID: 16793283 DOI: 10.1016/j.pep.2006.05.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2006] [Revised: 05/01/2006] [Accepted: 05/09/2006] [Indexed: 11/19/2022]
Abstract
Due to their involvement in a variety of physiological and pathological processes, different isoforms of annexins are being utilized as markers of some human diseases and bio-imaging of tissue injury (due to apoptosis), and have been proposed as drug delivery vehicles. These, in addition to extensive biophysical studies on the role of annexins in organizing lipid domains in biological membranes, have necessitated development of an efficient protocol for producing annexins in bulk quantities. In this paper, we report a one-step purification protocol for annexin a5 without using lipid vesicles or involving any column chromatographic step. Depending on the growth and expression condition, a fraction of recombinant annexin a5 (cloned in pET3d vector) was sequestered into inclusion bodies. When these inclusion bodies were dissolved in 6 M urea, subjected to a 10-fold snap dilution in the presence of 5 mM Ca(2+) and stored overnight at 4 degrees C, annexin a5 was precipitated as a homogenous protein as judged by SDS-PAGE. This one-step purification protocol produced about 35 mg of highly purified annexin a5 per liter of bacterial culture. The annexin a5 purified from inclusion bodies exhibited similar properties to that obtained from the soluble fraction using the conventional lipid-partitioning approach. Our purification protocol for annexin a5 elaborated herein is equally effective for purification of annexin A2, and we believe, will serve as general protocol for purifying other annexins in bulk quantities for diagnostic as well as detailed biophysical studies.
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Affiliation(s)
- Adekunle I Elegbede
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, ND 58105, USA
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15
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Nengsheng Y, Rongli Z, Guoan L, Xue F, Yanfeng Z, Yiming W. Proteome analysis of Chinese miniswine bone marrow mesenchymal stem cells. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2006. [DOI: 10.1016/s1872-2040(06)60048-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Ye NS, Zhang RL, Zhao YF, Feng X, Wang YM, Luo GA. Effect of 5-azacytidine on the protein expression of porcine bone marrow mesenchymal stem cells in vitro. GENOMICS PROTEOMICS & BIOINFORMATICS 2006; 4:18-25. [PMID: 16689698 PMCID: PMC5053976 DOI: 10.1016/s1672-0229(06)60012-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Bone marrow-derived mesenchymal stem cells (MSCs) are pluripotent stem cells that show a vital potential in the clinical application for cell transplantation. In the present paper, proteomic techniques were used to approach the protein profiles associated with porcine bone marrow MSCs and investigate the regulation of MSC proteins on the effect of 5-azacytidine (5-aza). Over 1,700 protein species were separated from MSCs according to gel analysis. Compared with the expression profiling of control MSCs, there were 11 protein spots up-regulated and 26 down-regulated in the protein pattern of 5-aza-treated cells. A total of 21 proteins were successfully identified by MALDI-TOF-MS analysis, among which some interesting proteins, such as alpha B-crystallin, annexin A2, and stathmin 1, had been reported to involve in cell proliferation and differentiation through different signaling pathways. Our data should be useful for the future study of MSC differentiation and apoptosis.
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17
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Yamaoka K, Imajoh-Ohmi S, Fukuda H, Akita Y, Kurosawa K, Yamamoto Y, Sanai Y. Identification of phosphoproteins associated with maintenance of transformed state in temperature-sensitive Rous sarcoma-virus infected cells by proteomic analysis. Biochem Biophys Res Commun 2006; 345:1240-6. [PMID: 16716253 DOI: 10.1016/j.bbrc.2006.04.183] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2006] [Accepted: 04/26/2006] [Indexed: 11/28/2022]
Abstract
To identify phosphotyrosine-containing proteins essential for maintaining the transformed state, we studied the tyrosine phosphorylation profile of temperature-sensitive mutant of Rous sarcoma virus, tsNY68, infected cells (68N7). Shifting the temperature from 39 degrees C (nonpermissive) to 32 degrees C (permissive) markedly increased the expression of phosphotyrosine-containing cell membrane proteins of approximately 40kDa, as assessed by SDS-PAGE. Membrane and nuclear proteins were separated by two-dimensional gel electrophoresis and immunoblotted with anti-phosphotyrosine antibody. Proteins showing temperature-dependent changes in phosphorylation profile were subjected to in-gel digestion with trypsin and analyzed by mass spectrometry. Five proteins were identified: heterogeneous nuclear ribonucleoprotein (hnRNP) A3, hnRNP A2, annexin II, phosphoglycerate mutase 1, and triosephosphate isomerase 1. hnRNP A3 was phosphorylated at serine residues and had both serine and tyrosine phosphorylated sites. These results suggest an important complementary role for proteomics in identifying molecular abnormalities associated with tumor progression that may be attractive candidates for tumor diagnosis.
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Affiliation(s)
- Kazuko Yamaoka
- Laboratory of Glycobiology, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.
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18
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Das S, Sierra JC, Soman KV, Suarez G, Mohammad AA, Dang TAT, Luxon BA, Reyes VE. Differential protein expression profiles of gastric epithelial cells following Helicobacter pylori infection using ProteinChips. J Proteome Res 2005; 4:920-30. [PMID: 15952739 DOI: 10.1021/pr050023i] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Helicobacter pylori infects approximately half of the world's population and the bacterium is associated with gastric cancer and peptic and duodenal ulcers. In this study, Surface Enhanced Laser Desorption /Ionization time-of-flight mass spectrometry (SELDI-TOF-MS) was used to identify the biomarkers from H. pylori infected gastric epithelial cells (GEC) to understand key mechanisms associated with pathogenesis. Using different chip surfaces, differential protein expression profile of GEC was obtained and several upregulated or downregulated biomarkers were detected on GEC, following H. pylori infection. Four different H. pylori infected GECs were compared based on their expression of MHC class II, a receptor reported to trigger apoptosis. One biomarker was identified in H. pylori infected GEC as Annexin A2 (Annexin II) from the flow through of the anion-exchange resin. The increased expression of Annexin II in GEC following H. pylori infection was further confirmed by Western Blot analyses and indicates its involvement in H. pylori pathogenesis.
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Affiliation(s)
- Soumita Das
- Department of Pediatrics, Department of Microbiology and Immunology, Bioinformatics Program, and Department of Human Biological Chemistry and Genetics; Department of Pathology, University of Texas Medical Branch, Galveston, Texas 77555, USA
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