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Chen W, Lu J, Qin Y, Wang J, Tian Y, Shi D, Wang S, Xiao Y, Dai M, Liu L, Wei G, Wu T, Jin B, Xiao X, Kang TB, Huang W, Deng W. Ret finger protein-like 3 promotes tumor cell growth by activating telomerase reverse transcriptase expression in human lung cancer cells. Oncotarget 2015; 5:11909-23. [PMID: 25481043 PMCID: PMC4322990 DOI: 10.18632/oncotarget.2557] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Accepted: 10/01/2014] [Indexed: 12/23/2022] Open
Abstract
In this study, we identified ret finger protein-like 3 (RFPL3) as a hTERT promoter binding protein in lung cancer cells. The high hTERT promoter-binding activity of RFPL3 was detected in lung cancer cells compared to normal cells. Chromatin immunoprecipitation confirmed RFPL3 as a tumor-specific hTERT promoter binding protein. Overexpression of RFPL3 activated hTERT promoter and up-regulated hTERT expression and telomerase activity. Inhibition of RFPL3 expression by siRNA suppressed hTERT promoter activation and telomerase activity. Inhibition of RFPL3 by siRNA or shRNA also significantly inhibited tumor cell growth in vitro and in a xenograft mouse model in vivo. Immunohistochemical analysis of 181 human lung adenocarcinomas specimens showed a significant correlation between RFPL3 and hTERT expression. The overexpression of RFPL3 was also associated significantly with lymph node metastasis. Univariate and multivariate Cox model analyses of NSCLC clinical specimens revealed a strong correlation between RFPL3 expression and overall survival. These results demonstrate that RFPL3 is an important cellular factor which promotes lung cancer growth by activating hTERT expression and may be a potential novel therapeutic target for lung cancer.
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Affiliation(s)
- Wangbing Chen
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China. Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianjun Lu
- Department of Thoracic Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yu Qin
- Institute of Cancer Stem Cell & The First Affiliated Hospital, Dalian Medical University, Dalian, China
| | - Jingshu Wang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Yun Tian
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Dingbo Shi
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Shusen Wang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Yao Xiao
- Institute of Cancer Stem Cell & The First Affiliated Hospital, Dalian Medical University, Dalian, China
| | - Meng Dai
- Institute of Cancer Stem Cell & The First Affiliated Hospital, Dalian Medical University, Dalian, China
| | - Lu Liu
- Institute of Cancer Stem Cell & The First Affiliated Hospital, Dalian Medical University, Dalian, China
| | - Guo Wei
- Institute of Cancer Stem Cell & The First Affiliated Hospital, Dalian Medical University, Dalian, China
| | - Taihua Wu
- Institute of Cancer Stem Cell & The First Affiliated Hospital, Dalian Medical University, Dalian, China
| | - Bilian Jin
- Institute of Cancer Stem Cell & The First Affiliated Hospital, Dalian Medical University, Dalian, China
| | - Xiangsheng Xiao
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Tie-Bang Kang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Wenlin Huang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China. State Key Laboratory of Targeted Drug for Tumors of Guangdong Province, Guangzhou Double Bioproduct Inc., Guangzhou, China
| | - Wuguo Deng
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China. State Key Laboratory of Targeted Drug for Tumors of Guangdong Province, Guangzhou Double Bioproduct Inc., Guangzhou, China
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2
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Li JJ, Qi RZ, Ng GKH, Xie D. Proteomics in gastric cancer research: Benefits and challenges. Proteomics Clin Appl 2015; 3:185-96. [PMID: 26238618 DOI: 10.1002/prca.200800151] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2008] [Indexed: 12/14/2022]
Abstract
Among various cancers, gastric cancer (GC) exhibits relatively high morbidity and mortality rate worldwide. The lack of effective methods in early detection and diagnosis, and immediate therapies makes treating such disease a challenge for both clinicians and oncologists. Proteomics has emerged as a promising technology platform for rationally identifying biomarkers and novel therapeutic targets for GC, as well as discovering underlying mechanisms of carcinogenesis. Its application has greatly benefited mechanistic studies of this disease. This review will demonstrate the applications of proteomic technology in GC research. The advantages and shortcomings of this technology, as reflected by current studies, will also be discussed to improve and expand its application in the field of cancer research.
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Affiliation(s)
- Jing-Jing Li
- Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, P. R. China
| | - Robert Z Qi
- Department of Biochemistry, Hong Kong University of Science and Technology, Hong Kong, P. R. China
| | - Gary Kar Ho Ng
- Department of Biochemistry, Hong Kong University of Science and Technology, Hong Kong, P. R. China
| | - Dong Xie
- Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, P. R. China.
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Hu A, Yang Y, Zhang S, Zhou Q, Wei W, Wang Y. 4-Amino-2-trifluoromethyl-phenyl retinate inhibits the migration of BGC-823 human gastric cancer cells by downregulating the phosphorylation level of MLC II. Oncol Rep 2014; 32:1473-80. [PMID: 25051015 DOI: 10.3892/or.2014.3343] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Accepted: 06/24/2014] [Indexed: 11/06/2022] Open
Abstract
4-Amino-2-trifluoromethyl-phenyl retinate (ATPR) is a novel all-trans retinoic acid (ATRA) derivative which was reported to have a superior antitumor effect in breast cancer cells. However, little is known about its antitumor effects on human gastric cancer cells and the mechanisms have not been fully elucidated. The results of the present study suggest that in the human gastric carcinoma cell line BGC-823, ATPR plays a more effective role than ATRA at the same dose in inhibiting proliferation, migration and inducing differentiation after the same treatment time. Furthermore, we investigated the preliminary mechanism of ATPR's anti‑migration effect. Immunofluorescence assay demonstrated that claudin-18 positioned from cytoplasm to cell surface following ATPR stimuli. Real-time quantitative RT-PCR and western blot analyses showed that ATPR had significant effects on downregulation of the phosphorylation level of myosin light chain II (MLC II) by suppressing myosin light chain kinase (MLCK) and Rho-associated coiled-coil containing kinase (ROCK), as well as its regulation in the protein expression of RARα and RARβ. Moreover, ATPR increased the activity of myosin phosphatase by inhibiting ROCK. Consequently, ATPR showed more promising antitumor effects than ATRA in BGC-823 in vitro, and it may conduct its anti-migration effects by decreasing the phosphorylation level of MLC II, as well as by regulating MLCK and ROCK as downstream target genes.
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Affiliation(s)
- Anla Hu
- Institute of Clinical Pharmacology, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Yanyan Yang
- Laboratory of Molecular Biology and Department of Biochemistry, Key Laboratory of Anti-Inflammatory and Immunological Pharmacology, Ministry of Education and Key Laboratory of Gene Resource Utilization for Severe Disease of Anhui Province, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Sumei Zhang
- Laboratory of Molecular Biology and Department of Biochemistry, Key Laboratory of Anti-Inflammatory and Immunological Pharmacology, Ministry of Education and Key Laboratory of Gene Resource Utilization for Severe Disease of Anhui Province, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Qing Zhou
- Laboratory of Molecular Biology and Department of Biochemistry, Key Laboratory of Anti-Inflammatory and Immunological Pharmacology, Ministry of Education and Key Laboratory of Gene Resource Utilization for Severe Disease of Anhui Province, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Wei Wei
- Institute of Clinical Pharmacology, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Yuan Wang
- Institute of Clinical Pharmacology, Anhui Medical University, Hefei, Anhui 230032, P.R. China
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Amsterdam A, Raanan C, Shpigner L, Shwiqi A, Melzer E, Schreiber L. TADG-12 as an early marker in the development of pancreatic ductal adenocarcinoma (PDAC): involvement of insulin containing cells. Acta Histochem 2014; 116:781-7. [PMID: 24560937 DOI: 10.1016/j.acthis.2014.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 01/07/2014] [Accepted: 01/09/2014] [Indexed: 10/25/2022]
Abstract
TADG-12 is a serine protease that was characterized as expressed in ovarian and gastric carcinomas. Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal cancers and its late detection results in poor prognosis. Therefore, we decided to examine whether TADG-12 appears early in PDAC development. In normal pancreas, pale to moderate immunostaining is present in islets of Langerhans, while exocrine tissue and ducts are free from labeling. In contrast, in cancer patients, who still preserve the integrity of the exocrine and the endocrine tissues, a pronounced immunolabelling of TADG-12 was evident mainly located in the insulin containing β cells. In a more progressive stage of the disease TADG-12 was also evident in the deteriorated exocrine tissue. TADG-12 was also heavily labeled in islets of Langerhans, which were embedded in the stroma of the residual pancreatic tissue. Again, there was a considerable overlap between the labeling of insulin and TADG-12 in these islets. Close correlation between insulin and TADG-12 was also evident in islets of Langerhans surrounded by adipose cells. The TADG-12 labeled was confined to the cytoplasm and the membrane of the cells. In the progressive stage of PDAC, the cancerous ducts were clearly labeled with TADG-12 with no labeling of insulin. At high magnification the TADG-12 clearly labeled the cytoplasm and the cell wall membrane of duct cells, while the nuclei remained unstained upon incubation with antibodies to TADG-12. The present findings may assist in early detection of PDAC as well as targeting of TADG-12 in order to attenuate the rapid progression of the disease.
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Affiliation(s)
- Abraham Amsterdam
- Department of Molecular Cell Biology, The Weizmann Institute of Science, 234 Herzl Street, Rehovot 76100, Israel.
| | - Calanit Raanan
- Department of Biological Services, The Weizmann Institute of Science, 234 Herzl Street, Rehovot 76100, Israel
| | - Lotem Shpigner
- Department of Molecular Cell Biology, The Weizmann Institute of Science, 234 Herzl Street, Rehovot 76100, Israel
| | - Arafat Shwiqi
- Department of Gastroenterology, Kaplan Medical Center, Rehovot 76100, Israel
| | - Ehud Melzer
- Department of Gastroenterology, Kaplan Medical Center, Rehovot 76100, Israel
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Preparation, antioxidant and antitumor activities in vitro of different derivatives of levan from endophytic bacterium Paenibacillus polymyxa EJS-3. Food Chem Toxicol 2012; 50:767-72. [DOI: 10.1016/j.fct.2011.11.016] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2011] [Revised: 11/13/2011] [Accepted: 11/14/2011] [Indexed: 11/23/2022]
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6
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Abou-El-Ardat K, Monsieurs P, Anastasov N, Atkinson M, Derradji H, De Meyer T, Bekaert S, Van Criekinge W, Baatout S. Low dose irradiation of thyroid cells reveals a unique transcriptomic and epigenetic signature in RET/PTC-positive cells. Mutat Res 2011; 731:27-40. [PMID: 22027090 DOI: 10.1016/j.mrfmmm.2011.10.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Revised: 09/20/2011] [Accepted: 10/13/2011] [Indexed: 11/28/2022]
Abstract
The high doses of radiation received in the wake of the Chernobyl incident and the atomic bombing of Hiroshima and Nagasaki have been linked to the increased appearance of thyroid cancer in the children living in the vicinity of the site. However, the data gathered on the effect of low doses of radiation on the thyroid remain limited. We have examined the genome wide transcriptional response of a culture of TPC-1 human cell line of papillary thyroid carcinoma origin with a RET/PTC1 translocation to various doses (0.0625, 0.5, and 4Gy) of X-rays and compared it to response of thyroids with a RET/PTC3 translocation and against wild-type mouse thyroids irradiated with the same doses using Affymetrix microarrays. We have found considerable overlap at a high dose of 4Gy in both RET/PTC-positive systems but no common genes at 62.5mGy. In addition, the response of RET/PTC-positive system at all doses was distinct from the response of wild-type thyroids with both systems signaling down different pathways. Analysis of the response of microRNAs in TPC-1 cells revealed a radiation-responsive signature of microRNAs in addition to dose-responsive microRNAs. Our results point to the fact that a low dose of X-rays seems to have a significant proliferative effect on normal thyroids. This observation should be studied further as opposed to its effect on RET/PTC-positive thyroids which was subtle, anti-proliferative and system-dependent.
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7
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Wei M, Wang Z, Yao H, Yang Z, Zhang Q, Liu B, Yu Y, Su L, Zhu Z, Gu Q. P27(Kip1), regulated by glycogen synthase kinase-3β, results in HMBA-induced differentiation of human gastric cancer cells. BMC Cancer 2011; 11:109. [PMID: 21439087 PMCID: PMC3078896 DOI: 10.1186/1471-2407-11-109] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2011] [Accepted: 03/27/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Gastric cancer is the second most common cause of global cancer-related mortality. Although dedifferentiation predicts poor prognosis in gastric cancer, the molecular mechanism underlying dedifferentiation, which could provide fundamental insights into tumor development and progression, has yet to be elucidated. Furthermore, the molecular mechanism underlying the effects of hexamethylene bisacetamide (HMBA), a recently discovered differentiation inducer, requires investigation and there are no reported studies concerning the effect of HMBA on gastric cancer. METHODS Based on the results of FACS analysis, the levels of proteins involved in the cell cycle or apoptosis were determined using western blotting after single treatments and sequential combinations of HMBA and LiCl. GSK-3β and proton pump were investigated by western blotting after up-regulating Akt expression by Ad-Akt infection. To investigate the effects of HMBA on protein localization and the activities of GSK-3β, CDK2 and CDK4, kinase assays, immunoprecipitation and western blotting were performed. In addition, northern blotting and RNase protection assays were carried out to determine the functional concentration of HMBA. RESULTS HMBA increased p27(Kip1) expression and induced cell cycle arrest associated with gastric epithelial cell differentiation. In addition, treating gastric-derived cells with HMBA induced G0/G1 arrest and up-regulation of the proton pump, a marker of gastric cancer differentiation. Moreover, treatment with HMBA increased the expression and activity of GSK-3β in the nucleus but not the cytosol. HMBA decreased CDK2 activity and induced p27(Kip1) expression, which could be rescued by inhibition of GSK-3β. Furthermore, HMBA increased p27(Kip1) binding to CDK2, and this was abolished by GSK-3β inhibition. CONCLUSIONS The results presented herein suggest that GSK-3β functions by regulating p27(Kip1) assembly with CDK2, thereby playing a critical role in G0/G1 arrest associated with HMBA-induced gastric epithelial cell differentiation.
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Affiliation(s)
- Min Wei
- Key Laboratory of Shanghai Gastric Neoplasms, Department of Surgery, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
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8
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Enthalpies of Dilution of N,N′-hexamethylenebisacetamide in Pure Water and Aqueous Solutions of Alkali Halide at 298.15 K. J SOLUTION CHEM 2010. [DOI: 10.1007/s10953-010-9609-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Bonnefont J, Laforge T, Plastre O, Beck B, Sorce S, Dehay C, Krause KH. Primate-specific RFPL1 gene controls cell-cycle progression through cyclin B1/Cdc2 degradation. Cell Death Differ 2010; 18:293-303. [PMID: 20725088 DOI: 10.1038/cdd.2010.102] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Ret finger protein-like 1 (RFPL1) is a primate-specific target gene of Pax6, a key transcription factor for pancreas, eye and neocortex development. However, its cellular activity remains elusive. In this article, we report that Pax6-elicited expression of the human (h)RFPL1 gene in HeLa cells can be enhanced by in vivo p53 binding to its promoter and therefore investigated the hypothesis that hRFPL1 regulates cell-cycle progression. Upon expression in these cells, hRFPL1 decreased cell number through a kinase-dependent mechanism as PKC activates and Cdc2 inhibits hRFPL1 activity. hRFPL1 antiproliferative activity led to an increased cell population in G(2)/M phase and specific cyclin B1 and Cdc2 downregulations, which were precluded by a proteasome inhibitor. Specifically, cytoplasm-localized hRFPL1 prevented cyclin B1 and Cdc2 accumulation during interphase. Consequently, cells showed a delayed entry into mitosis and cell-cycle lengthening resulting from a threefold increase in G(2) phase duration. Given previous reports that RFPL1 is expressed during cell differentiation, its impact on cell-cycle lengthening therefore provides novel insights into primate-specific development.
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Affiliation(s)
- J Bonnefont
- Department of Pathology and Immunology, School of Medicine, University of Geneva, Rue Michel-Servet 1, Geneva, Switzerland
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10
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Jing GJ, Xu DH, Shi SL, Li QF, Wang SY, Wu FY, Kong HY. Aberrant expression of nuclear matrix proteins during HMBA-induced differentiation of gastric cancer cells. World J Gastroenterol 2010; 16:2176-82. [PMID: 20440860 PMCID: PMC2864845 DOI: 10.3748/wjg.v16.i17.2176] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the aberrant expression of nuclear matrix proteins in human gastric cancer cells before and after hexamethylene bisacetamide (HMBA) treatment.
METHODS: Proteomics analysis of differential nuclear matrix proteins was performed by two dimensional electrophoresis polyacrylamide gel electrophoresis and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. The expression levels of three nuclear matrix proteins were further confirmed by Western blotting and their locations in nuclear matrix filament were observed by quantum dots-based immunofluorescence.
RESULTS: Proteomics analysis showed that 43 protein spots were significantly changed due to HMBA treatment. Fifteen proteins were identified in the HMBA-induced differentiation of gastric tumor cells. Eight proteins spots were down-regulated while seven were up-regulated. Among these proteins, prohibitin, nucleophosmin and hnRNP A2/B1 were significantly decreased in HMBA-treated human gastric cancer cells, and their locations in nuclear matrix were altered by HMBA. Our results proved the alteration of specific nuclear matrix proteins during the differentiation of human gastric cancer cells. And the aberrant expressions of nuclear matrix proteins were of significance in revealing the regulatory mechanism of tumor cell proliferation and differentiation.
CONCLUSION: The aberrant expressions and intracellular redistributions of nuclear matrix proteins before and after HMBA treatment indicated that nuclear matrix proteins play a pivotal role in the differentiation of gastric cancer cells.
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11
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Zhao ZL, Li QF, Zheng YB, Chen LY, Shi SL, Jing GJ. The Aberrant Expressions of Nuclear Matrix Proteins During the Apoptosis of Human Osteosarcoma Cells. Anat Rec (Hoboken) 2010; 293:813-20. [DOI: 10.1002/ar.21074] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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12
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Kovács P, Pállinger É, Csaba G. Effect of hexamethylene bisacetamide (HMBA) on the microtubular system of Tetrahymena pyriformis. Comp Biochem Physiol B Biochem Mol Biol 2008; 149:259-64. [DOI: 10.1016/j.cbpb.2007.09.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Revised: 09/19/2007] [Accepted: 09/20/2007] [Indexed: 11/17/2022]
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13
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Kim HK, Park WS, Kang SH, Warda M, Kim N, Ko JH, Prince AEB, Han J. Mitochondrial alterations in human gastric carcinoma cell line. Am J Physiol Cell Physiol 2007; 293:C761-71. [PMID: 17537807 DOI: 10.1152/ajpcell.00043.2007] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We compared mitochondrial function, morphology, and proteome in the rat normal gastric cell line RGM-1 and the human gastric cancer cell line AGS. Total numbers and cross-sectional sizes of mitochondria were smaller in AGS cells. Mitochondria in AGS cells were deformed and consumed less oxygen. Confocal microscopy indicated that the mitochondrial inner membrane potential was hyperpolarized and the mitochondrial Ca(2+) concentration was elevated in AGS cells. Interestingly, two-dimensional electrophoresis proteomics on the mitochondria-enriched fraction revealed high expression of four mitochondrial proteins in AGS cells: ubiquinol-cytochrome c reductase, mitochondrial short-chain enoyl-coenzyme A hydratase-1, heat shock protein 60, and mitochondria elongation factor Tu. The results provide clues as to the mechanism of the mitochondrial changes in cancer at the protein level and may serve as potential cancer biomarkers in mitochondria.
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Affiliation(s)
- Hyoung Kyu Kim
- Mitochondrial Signaling Laboratory, Mitochondria Research Group, Dept of Physiology and Biophysics, College of Medicine, Biohealth Products Research Center, Cardiovascular and Metabolic Disease Center, Inje University, Busanjin-Gu, Busan, Korea
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14
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Wang S, Zhu R, Peng B, Liu M, Lou Y, Ye X, Xu Z, Liu D, Peng X. Identification of alkaline proteins that are differentially expressed in an overgrowth-mediated growth arrest and cell death ofEscherichia coliby proteomic methodologies. Proteomics 2006; 6:5212-20. [PMID: 16955513 DOI: 10.1002/pmic.200500065] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The available Escherichia coli genome sequences offer an opportunity to further expand our understanding of this bacterium. In the current study, we present a rapid method for the isolation of bacterial alkaline proteins using acid incubation, purification and protein array by 2-DE, followed by protein identification using MS. Fifty-seven proteins were randomly chosen, in which 55 were identified by a database searching of MS data. The searching results showed that most of these alkaline proteins were involved in special functions within the cell, suggesting that alkaline proteome is an ideal fraction for an understanding of their special functions. Furthermore, alkaline proteomes were compared between the period of majority live bacteria (18-h culture), the period of similar amount of live and dead bacteria (30-h culture) and the period of majority dead bacteria (48-h culture). Six proteins were identified as differentially expressed targets, in which putative transcriptional regulator and superoxide dismutase genes were cloned and expressed for antiserum preparations. The antisera were applied for the confirmation of results obtained from 2-DE. The presented data clearly reveal that alkaline proteome analysis by 2-DE with MS plays an important role in the understanding of protein functions within the cell, and six alkaline proteins are determined as key ones in an overgrowth-mediated growth cycle of E. coli.
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Affiliation(s)
- Sanying Wang
- Center for Proteomics, Department of Biology, School of Life Sciences, Xiamen University, Xiamen, P R China
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15
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Proteomic approach for acute-phase proteins of hemolymph and muscles in Scylla serrata challenged by a pathogenic bacterium. ACTA ACUST UNITED AC 2006. [DOI: 10.1007/s11515-006-0031-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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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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Xu C, Lin X, Ren H, Zhang Y, Wang S, Peng X. Analysis of outer membrane proteome ofEscherichia coli related to resistance to ampicillin and tetracycline. Proteomics 2006; 6:462-73. [PMID: 16372265 DOI: 10.1002/pmic.200500219] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The elucidation of the molecular details of antibiotic resistance will lead to improvements in extending the efficacy of current antimicrobials. In the current study, proteomic methodologies were applied to characterize functional outer membrane proteins (Omps) of E. coli K-12 responded to tetracycline and ampicillin resistance for understanding of universal pathways that form barriers for antimicrobial agents. For this purpose, E. coli K-12 expressional outer membrane proteome was characterized and identified with the use of 2-DE and MALDI-TOF/MS methods. Then, differential Omps due to tetracycline or ampcilin resistance were determined by comparison between tetracycline minimum inhibitory concentration (MIC)10, ampicillin MIC10, control0 and control10, showing 9 proteins with 11 spots for tetracycline and 8 protein with 9 spots for ampicillin, showing a difference in only 1 protein (decreased LamB in tetracyclin) between the two antibiotics. Among the proteins, 3 were known as antibiotic-resistant proteins, including TolC, OmpC and YhiU, while FimD precursor, LamB, Tsx, YfiO, OmpW, NlpB were first reported here to be antibiotic-resistance-related proteins. Our findings will be helpful for further understanding of antibiotic-resistant mechanism(s). This study also shows that the combination of Omp purification methods certainly contributes the sensitivity of Omp detection.
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Affiliation(s)
- Changxin Xu
- Center for Proteomics, Department of Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, PR China
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18
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Peng X, Xu C, Ren H, Lin X, Wu L, Wang S. Proteomic Analysis of the Sarcosine-Insoluble Outer Membrane Fraction ofPseudomonasaeruginosaResponding to Ampicilin, Kanamycin, and Tetracycline Resistance. J Proteome Res 2005; 4:2257-65. [PMID: 16335974 DOI: 10.1021/pr050159g] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nosocomial wound infections by antibiotic-resistant Pseudomonas aeruginosa strains have increasing importance in hospitals. Outer membrane proteins of the bacterium have strong influence on its resistance to antibiotics. In the current study, a parallel proteomic approach was applied to analysis of sarcosine-insoluble outer membrane fraction of P. aeruginosa responding to ampicilin, kanamycin and tetracycline resistances. Eleven differential proteins with 15 spots were determined and then identified by MALDI-TOF/MS, in which four with increased OprF, MexA, OmpH, and decreased hypothetical protein (NCBI No. 15599856), six with increased OprF, OmpH, hypothetical protein (NCBI No. 15599183) and decreased OprG, MexA, conserved hypothetical protein (NCBI No. 15600371), and eight with increased OprF, MexA, OprL, probable Omp (NCBI No. 15599856), probable secretion protein (NCBI No. 15600167), OprD and decreased OprG, conserved hypothetical protein (NCBI No. 15600371) responded to ampicilin, kanamycin, and tetracycline resistances, respectively. With the exception of OprF, the other differential proteins did not show the same behaviors against the three antibiotic resistances. Compared with our previous report on E. coli Omps responding to ampicilin and tetracycline resistances, which was only a protein difference in quality between the two antibiotics, P. aeruginosa showed significant diversity against the three antibiotics. Our findings might provide valuable data for an understanding of antibiotic-resistant difference between different species of bacteria. Meanwhile, these proteins shared by different bacteria or a bacterium against different antibiotics may provide universal targets for the development of new drugs that control antibiotic-resistant bacteria.
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Affiliation(s)
- Xuanxian Peng
- Center for Proteomics, Department of Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
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Ping S, Wang S, Zhang J, Peng X. Effect of all-trans-retinoic acid on mRNA binding protein p62 in human gastric cancer cells. Int J Biochem Cell Biol 2005; 37:616-27. [PMID: 15618018 DOI: 10.1016/j.biocel.2004.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2004] [Revised: 08/21/2004] [Accepted: 08/31/2004] [Indexed: 11/18/2022]
Abstract
p62 is a cancer-associated antigen binding to mRNA encoding insulin-like growth factor II that was isolated by immunoscreening a cDNA expression library with autoantibodies from patients with hepatocellular carcinoma (HCC). In the present study, multiple methods including flow cytometry, confocal laser-scanning microscope, electron microscope were used to characterize the effect of ATRA on BGC-823 cells, which presented two phenotypes of differentiation and apoptosis in cells treated with 1.0 and 50 microM ATRA, respectively. Interestingly, we found that p62 was cytoplasmic in location, but it significantly decreased in cytoplasm and appeared in nucleus of cells when the cells were treated with 50 microM all-trans retinoic acid (ATRA) for 5 days. Furthermore, proteomics approach on differential nucleus proteins showed that the up-regulation and/or down-regulation of cell cycle proteins and IGF binding proteins were involved in the apoptosis of BGC-823 cells induced by ATRA. These results suggest that there is a significant association between expression and distribution of p62 and the growth arrest of tumor cells, in which p62 is associated with cell apoptosis induced by ATRA.
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MESH Headings
- Apoptosis/drug effects
- Blotting, Western
- Carcinoma, Hepatocellular/immunology
- Carcinoma, Hepatocellular/pathology
- Cell Differentiation
- Cell Line, Tumor
- Dose-Response Relationship, Drug
- Electrophoresis, Gel, Two-Dimensional
- Flow Cytometry
- Fluorescent Antibody Technique, Indirect
- Humans
- Image Processing, Computer-Assisted
- Microscopy, Confocal
- Microscopy, Electron
- Neoplasm Proteins/metabolism
- Peptide Mapping
- Proteomics
- RNA, Messenger/drug effects
- RNA-Binding Proteins/metabolism
- Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
- Stomach Neoplasms/metabolism
- Stomach Neoplasms/pathology
- Stomach Neoplasms/ultrastructure
- Subcellular Fractions/metabolism
- Time Factors
- Tretinoin/pharmacology
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Affiliation(s)
- Shi Ping
- Center for Proteomics and Department of Biology, School of Life Sciences, Xiamen University, Xiamen 361005, PR China
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Fan Y, Liu J, Wang S, Wang H, Shi F, Xiong L, He W, Peng X. Functional proteome of bones in rats with osteoporosis following ovariectomy. Life Sci 2005; 76:2893-901. [PMID: 15820501 DOI: 10.1016/j.lfs.2004.10.059] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2004] [Accepted: 10/14/2004] [Indexed: 11/29/2022]
Abstract
Osteoporosis is a chronic condition chiefly affecting postmenopausal women, in whom the skeleton loses a significant percentage of its mineralized mass and mechanical resiliency, thereby becoming prone to fracture. Although the effect of the loss of estrogen on bone metabolism has been documented, its mechanism is still poorly understood. In the present proteomic study, we characterized the effect of estrogen deficiency on protein expression in rat bones. Using two-dimensional gel electrophoresis, mass spectrometry and rat protein database, we successfully identified three distinctly changed proteins named thioredoxin peroxidase 1, myosin light polypeptide 2 and ubiquitin-conjugating enzyme E2-17 kD, among which ubiquitin-conjugating enzyme E2-17 kD has been documented to be an estrogen-related protein, but the other two are first reported to be osteoporosis-related proteins in the current study. These results provide valuable experimental evidences for the elucidation of the molecular mechanism of osteoporosis related to the loss of estrogen.
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Affiliation(s)
- Yueguang Fan
- Guangzhou University of Traditional Chinese Medicine, Guangzhou, Guangdong, 510405, P.R. China
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Xu C, Ren H, Wang S, Peng X. Proteomic analysis of salt-sensitive outer membrane proteins of Vibrio parahaemolyticus. Res Microbiol 2005; 155:835-42. [PMID: 15567278 DOI: 10.1016/j.resmic.2004.07.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2004] [Accepted: 07/01/2004] [Indexed: 10/26/2022]
Abstract
Vibrio parahaemolyticus, a universal marine pathogen with available genome sequences, could be used as a bacterial model to clarify the various physiological phenomena of its native and host environments. In the present study, proteomic methodologies were applied to investigate the expression pattern of outer membrane proteins (OMPs) of V. parahaemolyticus at different NaCl concentrations. OmpW, OmpV, elongation factor TU and polar flagellin were determined to be osmoregulation-sensitive OMPs, among which OmpW and OmpV were reported to vary with changed NaCl concentrations in the pattern of osmolarity regulation. Therefore, our results not only expand our knowledge on osmoregulation-related proteins, but also provide a valuable strategy for the screening of salt-sensitive proteins.
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Affiliation(s)
- Changxin Xu
- Center for Proteomics, Department of Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, PR China
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Current Awareness on Comparative and Functional Genomics. Comp Funct Genomics 2004. [PMCID: PMC2447475 DOI: 10.1002/cfg.357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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