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Kim JH, Lee SK, Yoo YC, Park NH, Park DB, Yoo JS, An HJ, Park YM, Cho KG. Proteome analysis of human cerebrospinal fluid as a diagnostic biomarker in patients with meningioma. Med Sci Monit 2013; 18:BR450-60. [PMID: 23111736 PMCID: PMC3560610 DOI: 10.12659/msm.883538] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND To identify meningioma-specific proteins, cerebrospinal fluid (CSF) from 4 patients with a meningioma and 4 patients with a non-brain tumorous lesion were analyzed. MATERIAL/METHODS Two-dimensional electrophoresis and electrospray quadrupole time-of-flight tandem mass spectrometry analyses revealed 10 unique spots, containing 11 independent proteins (spot #2 and #4 each contained 2 proteins and spot #3 was not identified) were evident in CSF associated with human meningioma: serum albumin precursor (3 different isoforms), Apolipoprotein E (Apo E), Apolipoprotein J precursor (Apo J), Transthyretin precursor (TTR), Prostaglandin D2 synthase 21 kDa (PTGDS), proapolipoprotein, Chain D hemoglobin Ypsilanti, alpha-1-antitrypsin (AAT), and beta-2-microglobulin precursor (β2M). RESULTS The contents of Apo E, Apo J and AAT were increased, while PTGDS, TTR and β2M were decreased. CONCLUSIONS The results observed by 2-dimensional electrophoresis were verified by Western blot analysis. The unique proteins may represent possible candidate biomarkers of meningioma.
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Affiliation(s)
- Jae Ho Kim
- Mass Spectrometry Research Center, Korea Basic Science Institute, Ochang, Republic of Korea
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52
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Kim JY, Lee JR, Choi S, Kim EM, Jung NK, Kim YH, Yoo JS, Lee SW. Quantitative pattern analysis of the N-terminally processed isoforms of platelet factor-4 in serum. Rapid Commun Mass Spectrom 2013; 27:521-530. [PMID: 23322658 DOI: 10.1002/rcm.6480] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 11/20/2012] [Accepted: 11/28/2012] [Indexed: 06/01/2023]
Abstract
RATIONALE Platelet factor 4 (PF4) is a small cytokine belonging to the CXC chemokine family which has been shown to play a role in inflammation and in the regulation of angiogenesis. In general, chemokines are susceptible to proteolytic cleavage in amino and carboxy terminal regions, which usually results in dramatic changes to the chemokine bioactivity. The purpose of this study was to identify various platelet factor-4 (PF4) isoforms caused by proteolytic processing and to quantify their levels in normal serum. METHODS First, we identified the N-terminally truncated PF4 isoforms from a standard purified PF4 protein sample by using mass spectrometry (MS) and tandem mass spectrometry (MS/MS) analysis. Then, we used high-performance liquid chromatography (HPLC) to semi-purify PF4 from serum samples, and the levels of the four most abundant PF4 isoforms were quantitatively determined using selected reaction monitoring (SRM) assays on a nano-LC/triple-quadrupole mass spectrometer. RESULTS We have identified seven N-terminally processed PF4 isoforms and compared the levels of major PF4 isoforms from nine serum samples. Pro-p1 (EAEEDGDLQCLCVK-; average MW, 7765.2) is the major PF4 isoform in serum whereas the PF4 isoforms, designated Prot-p4 (FASAEAEEDGDLQCLCVK-;average MW, 8141.5), Prot-p3 (SAEAEEDGDLQCLCVK-; average MW, 7923.3), and Prot-p2 (AEEDGDLQCLCVK- ; average MW, 7836.3), are at about 16%, 3%, and 2% levels of the major one, respectively. CONCLUSIONS This study is the first report on the levels of N-terminally processed PF4 isoforms in serum. Also, this study shows the usefulness of SRM in determining concentrations of protein isoform variants, which can be often overlooked in immunoassay analysis.
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Affiliation(s)
- Jin Young Kim
- Division of Mass Spectrometry Research, Korea Basic Science Institute, Ochang, Korea
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53
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Lee HJ, Jeong SK, Na K, Lee MJ, Lee SH, Lim JS, Cha HJ, Cho JY, Kwon JY, Kim H, Song SY, Yoo JS, Park YM, Kim H, Hancock WS, Paik YK. Comprehensive Genome-Wide Proteomic Analysis of Human Placental Tissue for the Chromosome-Centric Human Proteome Project. J Proteome Res 2013; 12:2458-66. [DOI: 10.1021/pr301040g] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Hyoung-Joo Lee
- Yonsei Proteome Research Center
and Department of Integrated Omics for Biomedical Science, World Class
University Program, Yonsei University,
Seoul, Korea
| | - Seul-Ki Jeong
- Yonsei Proteome Research Center
and Department of Integrated Omics for Biomedical Science, World Class
University Program, Yonsei University,
Seoul, Korea
| | - Keun Na
- Yonsei Proteome Research Center
and Department of Integrated Omics for Biomedical Science, World Class
University Program, Yonsei University,
Seoul, Korea
| | - Min Jung Lee
- Yonsei Proteome Research Center
and Department of Integrated Omics for Biomedical Science, World Class
University Program, Yonsei University,
Seoul, Korea
| | - Sun Hee Lee
- Yonsei Proteome Research Center
and Department of Integrated Omics for Biomedical Science, World Class
University Program, Yonsei University,
Seoul, Korea
| | - Jong-Sun Lim
- Yonsei Proteome Research Center
and Department of Integrated Omics for Biomedical Science, World Class
University Program, Yonsei University,
Seoul, Korea
| | - Hyun-Jeong Cha
- Yonsei Proteome Research Center
and Department of Integrated Omics for Biomedical Science, World Class
University Program, Yonsei University,
Seoul, Korea
| | - Jin-Young Cho
- Yonsei Proteome Research Center
and Department of Integrated Omics for Biomedical Science, World Class
University Program, Yonsei University,
Seoul, Korea
| | | | - Hoguen Kim
- Yonsei University College of Medicine, Seoul, Korea
| | | | - Jong Shin Yoo
- Division of Mass Spectrometry
Research, Korea Basic Science Institute, Ochang, Chungbuk, Korea
| | - Young Mok Park
- Division of Mass Spectrometry
Research, Korea Basic Science Institute, Ochang, Chungbuk, Korea
| | - Hail Kim
- Graduate School of Medical Science & Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea
| | - William S. Hancock
- Yonsei Proteome Research Center
and Department of Integrated Omics for Biomedical Science, World Class
University Program, Yonsei University,
Seoul, Korea
- Barnnet Institute and Department of
Chemistry, Northeastern University, Boston,
Massachusetts, United States
| | - Young-Ki Paik
- Yonsei Proteome Research Center
and Department of Integrated Omics for Biomedical Science, World Class
University Program, Yonsei University,
Seoul, Korea
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54
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Kwon KH, Kim JY, Kim SY, Min HK, Lee HJ, Ji IJ, Kang T, Park GW, An HJ, Lee B, Ravid R, Ferrer I, Chung CK, Paik YK, Hancock WS, Park YM, Yoo JS. Chromosome 11-Centric Human Proteome Analysis of Human Brain Hippocampus Tissue. J Proteome Res 2013; 12:97-105. [DOI: 10.1021/pr3008368] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kyung-Hoon Kwon
- Division of Mass Spectrometry Research, Korea Basic Science Institute, Ochang, Chungbuk, Republic of Korea,
| | - Jin Young Kim
- Division of Mass Spectrometry Research, Korea Basic Science Institute, Ochang, Chungbuk, Republic of Korea,
| | - Se-Young Kim
- Division of Mass Spectrometry Research, Korea Basic Science Institute, Ochang, Chungbuk, Republic of Korea,
| | - Hye Kyeong Min
- Division of Mass Spectrometry Research, Korea Basic Science Institute, Ochang, Chungbuk, Republic of Korea,
| | - Hyoung-Joo Lee
- Yonsei Proteome Research Center, Yonsei University, Seoul, Republic of Korea,
| | - In Jung Ji
- Division of Mass Spectrometry Research, Korea Basic Science Institute, Ochang, Chungbuk, Republic of Korea,
- Graduate School of Analytical Science
and Technology, Chungnam National University, Daejeon, Republic of Korea
| | - Taewook Kang
- Division of Mass Spectrometry Research, Korea Basic Science Institute, Ochang, Chungbuk, Republic of Korea,
- Graduate School of Analytical Science
and Technology, Chungnam National University, Daejeon, Republic of Korea
| | - Gun Wook Park
- Division of Mass Spectrometry Research, Korea Basic Science Institute, Ochang, Chungbuk, Republic of Korea,
- Graduate School of Analytical Science
and Technology, Chungnam National University, Daejeon, Republic of Korea
| | - Hyun Joo An
- Graduate School of Analytical Science
and Technology, Chungnam National University, Daejeon, Republic of Korea
| | - Bonghee Lee
- Lee Gil Ya Center and Diabetes Institute, Gachon University, Incheon, Republic of Korea,
| | - Rivka Ravid
- Royal Dutch Academy of Sciences, Amsterdam,
The Netherlands
| | - Isidro Ferrer
- Institut de Neuropatologia,
Servei Anatomia Patològica, IDIBELL-Hospital Universitari de
Bellvitge, Universitat de Barcelona, Spain
| | - Chun Kee Chung
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Young-Ki Paik
- Yonsei Proteome Research Center, Yonsei University, Seoul, Republic of Korea,
| | - William S. Hancock
- Barnett Institute, Northeastern University, Boston, Massachusetts, United States
| | - Young Mok Park
- Division of Mass Spectrometry Research, Korea Basic Science Institute, Ochang, Chungbuk, Republic of Korea,
- Graduate School of Analytical Science
and Technology, Chungnam National University, Daejeon, Republic of Korea
| | - Jong Shin Yoo
- Division of Mass Spectrometry Research, Korea Basic Science Institute, Ochang, Chungbuk, Republic of Korea,
- Graduate School of Analytical Science
and Technology, Chungnam National University, Daejeon, Republic of Korea
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Jeong SK, Lee HJ, Na K, Cho JY, Lee MJ, Kwon JY, Kim H, Park YM, Yoo JS, Hancock WS, Paik YK. GenomewidePDB, a proteomic database exploring the comprehensive protein parts list and transcriptome landscape in human chromosomes. J Proteome Res 2012; 12:106-11. [PMID: 23252913 DOI: 10.1021/pr3009447] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In an effort to map the human proteome, the Chromosome-centric Human Proteome Project (C-HPP) was recently initiated. As a member of the international consortium working on this project, our laboratory developed a gene-centric proteomic database called GenomewidePDB, which integrates proteomic data for proteins encoded by chromosomes with transcriptomic data and other information from public databases. As an example case, we chose chromosome 13, which is the largest acrocentric human chromosome with the lowest gene density and contains 326 predicted proteins. All proteins stored in GenomewidePDB are linked to other resources, including neXtProt and Ensembl for protein and gene information, respectively. The Global Proteome Machine database (GPMdb) and the PeptideAtlas are also accessed for observed mass spectrometry (MS) information, while Human Protein Atlas is used for information regarding antibody availability and tissue expression, respectively. Gene ontology disease information is also included. As a pilot work, we constructed this GenomewidePDB with the identified 3615 proteins including 53 chromosome 13-origin proteins that are present in normal human placenta tissue. Thus, developing a comprehensive database containing actual experimental proteomics data will provide a valuable resource for cross chromosomal comparison in the C-HPP community.
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Affiliation(s)
- Seul-Ki Jeong
- Yonsei Proteome Research Center and Cancer Proteome Research Center, Department of the Integrated Omics for Biomedical Science, World Class University Graduate Program, Yonsei University, 50 Yonsei-ro, Sudaemoon-ku, Seoul 120-749, Korea
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56
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Byun K, Young Kim J, Bayarsaikhan E, Kim D, Jeong GB, Yun KN, Kyeong Min H, Kim SU, Yoo JS, Lee B. Quantitative proteomic analysis reveals that lipopolysaccharide induces mitogen-activated protein kinase-dependent activation in human microglial cells. Electrophoresis 2012; 33:3756-63. [PMID: 23161002 DOI: 10.1002/elps.201200345] [Citation(s) in RCA: 9] [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] [Received: 06/29/2012] [Revised: 08/18/2012] [Accepted: 08/21/2012] [Indexed: 11/12/2022]
Abstract
Microglial cells act as the first and main form of active immune defense in the central nervous system related to inflammation and neurodegenerative disease. Lipopolysaccharide (LPS) induces many genes encoding inflammatory mediators, including cytokines such as tumor necrosis factor-α, interleukin-1β, (IL-1β), and IL-6, chemokines, and prostaglandins in microglial cells. Quantitative proteomics methods with isobaric chemical labeling using tandem mass tags and 2D-nano LC-ESI-MS/MS were used to systematically analyze proteomic changes in microglia responding to LPS stimulation. As a result, we found that the expression level of 21 proteins in human microglial cells changed after activation. Among those, one of the strong mitogen-activated protein kinase (MAPK) regulator proteins, CMPK1 was highly upregulated after LPS stimulation in human microglial cells. We detected and validated upregulation of MAPK including ERK1/2, p38, and SAPK/JNK by immunohistochemistry and Western blotting. NFκB, strong transcription factor of CMPK1, was translocated to the nucleus from the cytosol by high contents screening after LPS stimulation. Taken together, we conclude that MAPK signaling plays an important role in LPS-induced human microglial activation related to inflammatory response.
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Affiliation(s)
- Kyunghee Byun
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon, Korea
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57
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Heo CK, Hwang HM, Ruem A, Yu DY, Lee JY, Yoo JS, Kim IG, Yoo HS, Oh S, Ko JH, Cho EW. Identification of a mimotope for circulating anti-cytokeratin 8/18 antibody and its usage for the diagnosis of breast cancer. Int J Oncol 2012; 42:65-74. [PMID: 23128437 PMCID: PMC3583721 DOI: 10.3892/ijo.2012.1679] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [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: 07/27/2012] [Accepted: 09/14/2012] [Indexed: 12/22/2022] Open
Abstract
A novel circulating tumor-associated autoantibody, K94, obtained from a hepatocellular carcinoma (HCC) mouse model was characterized. The target antigen of K94 autoanti-body was expressed in various tumor cell lines including liver cancer, and its secretion was detectable using MCF-7 breast carcinoma cells. Proteomic analysis revealed that the protein bands reactive to K94 included cytokeratin (CK) 8 and 18, which are known to be related to tumorigenesis and form a heterotypic complex with each other. However, K94 showed no activity toward CK8 or CK18 separately. The epitope of the K94 antibody was only presented by a complex between CK8 and CK18, which was confirmed by analysis using recombinant CK8 and CK18 proteins. To formulate an assay for anti-CK8/18 complex autoantibody, a mimotope peptide reactive to K94 was selected from loop-constrained heptapeptide (-CX7C-) display phage library, of which sequence was CISPDAHSC (K94p1). A mimotope enzyme-linked immunosorbent assay (ELISA) using phage-displayed K94p1 peptide as a coating antigen was able to discriminate breast cancer (n=30) patients from normal subjects (n=30) with a sensitivity of 50% and a specificity of 82.61%. CA15.3 was detected at very low levels in the same breast cancer subjects and did not discriminate breast cancer patients from normal subjects, although it is a conventional biomarker of breast cancer. These results suggest that a mimotope ELISA composed of K94p1 peptide may be useful for the diagnosis of breast cancer.
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Affiliation(s)
- Chang-Kyu Heo
- Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
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58
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Kim YS, Ahn YH, Song KJ, Kang JG, Lee JH, Jeon SK, Kim HC, Yoo JS, Ko JH. Overexpression and β-1,6-N-acetylglucosaminylation-initiated aberrant glycosylation of TIMP-1: a "double whammy" strategy in colon cancer progression. J Biol Chem 2012; 287:32467-78. [PMID: 22859303 DOI: 10.1074/jbc.m112.370064] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
There has been ongoing debate over whether tissue inhibitor of metalloproteinase-1 (TIMP-1) is pro- or anti-oncogenic. We confirmed that TIMP-1 reinforced cell proliferation in an αvβ3 integrin-dependent manner and conferred resistance against cytotoxicity triggered by TNF-α and IL-2 in WiDr colon cancer cells. The cell-proliferative effects of TIMP-1 contributed to clonogenicity and tumor growth during the onset and early phase of tumor formation in vivo and in vitro. However, mass-produced TIMP-1 impeded further tumor growth by tightly inhibiting the activities of collagenases, which are critical for tumor growth and malignant transformation. Tumor cells could overcome this impasse by overexpression of N-acetylglucosaminyltransferase V, which deteriorates TIMP-1 into an aberrant glycoform. The aberrant glycoform of TIMP-1 was responsible for the mitigated inhibition of collagenases. The outbalanced activities of collagenases can degrade the basement membrane and the interstitial matrix, which act as a physical barrier for tumor growth and progression more efficiently. The concomitant overexpression of TIMP-1 and N-acetylglucosaminyltransferase V enabled WiDr cells to show a higher tumor growth rate as well as more malignant behaviors in a three-dimensional culture system.
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Affiliation(s)
- Yong-Sam Kim
- Cancer Biomarkers Development Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon, South Korea
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59
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Ahn YH, Shin PM, Oh NR, Park GW, Kim H, Yoo JS. A lectin-coupled, targeted proteomic mass spectrometry (MRM MS) platform for identification of multiple liver cancer biomarkers in human plasma. J Proteomics 2012; 75:5507-15. [PMID: 22789673 DOI: 10.1016/j.jprot.2012.06.027] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 06/04/2012] [Accepted: 06/30/2012] [Indexed: 10/28/2022]
Abstract
Aberrantly glycosylated proteins related to liver cancer progression were captured with specific lectin and identified from human plasma by multiple reaction monitoring (MRM) mass spectrometry as multiple biomarkers for hepatocellular carcinoma (HCC). The lectin fractionation for fucosylated protein glycoforms in human plasma was conducted with a fucose-specific aleuria aurantia lectin (AAL). Following tryptic digestion of the lectin-captured fraction, plasma samples from 30 control cases (including 10 healthy, 10 hepatitis B virus [HBV], and 10 cirrhosis cases) and 10 HCC cases were quantitatively analyzed by MRM to identify which glycoproteins are viable HCC biomarkers. A1AG1, AACT, A1AT, and CERU were found to be potent biomarkers to differentiate HCC plasma from control plasmas. The AUROC generated independently from these four biomarker candidates ranged from 0.73 to 0.92. However, the lectin-coupled MRM assay with multiple combinations of biomarker candidates is superior statistically to those generated from the individual candidates with AUROC more than 0.95, which can be an alternative to the immunoassay inevitably requiring tedious development of multiple antibodies against biomarker candidates to be verified. Eventually the lectin-coupled, targeted proteomic mass spectrometry (MRM MS) platform was found to be efficient to identify multiple biomarkers from human plasma according to cancer progression.
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Affiliation(s)
- Yeong Hee Ahn
- Division of Mass Spectrometry, Korea Basic Science Institute, Cheongwon-Gun 363-883, Republic of Korea
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60
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Lee H, Song M, Shin N, Shin CH, Min BS, Kim HS, Yoo JS, Kim H. Diagnostic significance of serum HMGB1 in colorectal carcinomas. PLoS One 2012; 7:e34318. [PMID: 22496788 PMCID: PMC3319566 DOI: 10.1371/journal.pone.0034318] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Accepted: 02/29/2012] [Indexed: 12/13/2022] Open
Abstract
High mobility group box 1 protein (HMGB1), a nuclear protein, can be translocated to the cytoplasm and secreted in colon cancer cells. However, the diagnostic significance of HMGB1 has not been evaluated in colorectal carcinomas. For this purpose, we have screened the expression and secretion of HMGB1 in 10 colon cancer cell lines and 1 control cell line and found that HMGB1 was detected in the culture medium. To evaluate the diagnostic value of HMGB1, we performed an enzyme-linked immunosorbent assay to measure HMGB1 levels and compared them to carcinoembryonic antigen (CEA) levels in the serum samples of 219 colorectal carcinoma patients and 75 healthy control subjects. We found that the serum HMGB1 level was increased by 1.5-fold in patients with colorectal carcinoma compared to those in healthy controls. When HMGB1 and CEA levels were compared, HMGB1 had similar efficacy as CEA regarding cancer detection (the sensitivity was 20.1% for HMGB1 vs. 25.6% for CEA, and the specificity was 96% for HMGB1 vs. 90.7% for CEA). Moreover, the diagnostic accuracy of HMGB1 for stage I cancer was significantly higher than that of CEA (sensitivity: 41.2% vs. 5.9%; specificity: 96% vs. 90.7). When we combined HMGB1 and CEA, the overall diagnostic sensitivity was higher than that of CEA alone (42% vs. 25.6%), and the diagnostic sensitivity for stage I was also elevated (47% vs. 5.9%). However, the prognosis of patients was not related with serum HMGB1 concentrations. Our findings indicate that serum HMGB1 levels are increased in a subset of colorectal carcinomas, suggesting their potential utility as a supportive diagnostic marker for colorectal carcinomas.
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Affiliation(s)
- Hanna Lee
- Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
- Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Korea
| | - Meiying Song
- Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
- Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Korea
| | - Nara Shin
- Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
- Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Korea
| | - Chang Hoon Shin
- Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
- Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Korea
| | - Byung Soh Min
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Hyon-Suk Kim
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Jong Shin Yoo
- Division of mass spectrometric analysis, Korea Basic Science Institute, Cheongwon, Korea
| | - Hoguen Kim
- Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
- Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Korea
- * E-mail:
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Kwak D, Choi S, Jeong H, Jang JH, Lee Y, Jeon H, Lee MN, Noh J, Cho K, Yoo JS, Hwang D, Suh PG, Ryu SH. Osmotic stress regulates mammalian target of rapamycin (mTOR) complex 1 via c-Jun N-terminal Kinase (JNK)-mediated Raptor protein phosphorylation. J Biol Chem 2012; 287:18398-407. [PMID: 22493283 DOI: 10.1074/jbc.m111.326538] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
mTOR complex 1 (mTORC1) is a multiprotein complex that integrates diverse signals including growth factors, nutrients, and stress to control cell growth. Raptor is an essential component of mTORC1 that functions to recruit specific substrates. Recently, Raptor was suggested to be a key target of regulation of mTORC1. Here, we show that Raptor is phosphorylated by JNK upon osmotic stress. We identified that osmotic stress induces the phosphorylation of Raptor at Ser-696, Thr-706, and Ser-863 using liquid chromatography-tandem mass spectrometry. We found that JNK is responsible for the phosphorylation. The inhibition of JNK abolishes the phosphorylation of Raptor induced by osmotic stress in cells. Furthermore, JNK physically associates with Raptor and phosphorylates Raptor in vitro, implying that JNK is responsible for the phosphorylation of Raptor. Finally, we found that osmotic stress activates mTORC1 kinase activity in a JNK-dependent manner. Our findings suggest that the molecular link between JNK and Raptor is a potential mechanism by which stress regulates the mTORC1 signaling pathway.
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Affiliation(s)
- Dongoh Kwak
- Division of Molecular and Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk, Korea
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Paik YK, Omenn GS, Uhlen M, Hanash S, Marko-Varga G, Aebersold R, Bairoch A, Yamamoto T, Legrain P, Lee HJ, Na K, Jeong SK, He F, Binz PA, Nishimura T, Keown P, Baker MS, Yoo JS, Garin J, Archakov A, Bergeron J, Salekdeh GH, Hancock WS. Standard Guidelines for the Chromosome-Centric Human Proteome Project. J Proteome Res 2012; 11:2005-13. [DOI: 10.1021/pr200824a] [Citation(s) in RCA: 125] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Young-Ki Paik
- Yonsei Proteome Research
Center and Department of Integrated Omics for Biomedical Science (World Class University Program), Yonsei University, Seoul, Korea
| | - Gilbert S. Omenn
- Center for Computational Medicine
and Bioinformatics, University of Michigan, Ann Arbor, Michigan, United States
| | | | - Samir Hanash
- Fred Hutchinson Cancer Research Center, Seattle, Washington, United
States
| | | | - Ruedi Aebersold
- Department of Biology, Institute of
Molecular Systems Biology, ETH, Zürich, and Faculty of Science, University of Zurich, Switzerland
| | - Amos Bairoch
- Swiss Institute of Bioinformatics
(SIB) and University of Geneva, Geneva,
Switzerland
| | - Tadashi Yamamoto
- Graduate School
of Medical and
Dental Sciences, Niigata University, Niigata,
Japan
| | | | - Hyoung-Joo Lee
- Yonsei Proteome Research
Center and Department of Integrated Omics for Biomedical Science (World Class University Program), Yonsei University, Seoul, Korea
| | - Keun Na
- Yonsei Proteome Research
Center and Department of Integrated Omics for Biomedical Science (World Class University Program), Yonsei University, Seoul, Korea
| | - Seul-Ki Jeong
- Yonsei Proteome Research
Center and Department of Integrated Omics for Biomedical Science (World Class University Program), Yonsei University, Seoul, Korea
| | - Fuchu He
- Beijing Proteome Research Center, Beijing,
China
| | - Pierre-Alain Binz
- Swiss Institute of Bioinformatics
(SIB) and University of Geneva, Geneva,
Switzerland
| | | | - Paul Keown
- University of British Columbia, Vancouver, Canada
| | | | | | | | | | | | | | - William S. Hancock
- Yonsei Proteome Research
Center and Department of Integrated Omics for Biomedical Science (World Class University Program), Yonsei University, Seoul, Korea
- Northeastern University, Boston, Massachusetts, United States
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Sung HJ, Jeon SA, Ahn JM, Seul KJ, Kim JY, Lee JY, Yoo JS, Lee SY, Kim H, Cho JY. Large-scale isotype-specific quantification of Serum amyloid A 1/2 by multiple reaction monitoring in crude sera. J Proteomics 2012; 75:2170-80. [PMID: 22300576 DOI: 10.1016/j.jprot.2012.01.018] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Revised: 01/09/2012] [Accepted: 01/14/2012] [Indexed: 12/19/2022]
Abstract
Quantification is an essential step in biomarker development. Multiple reaction monitoring (MRM) is a new modified mass spectrometry-based quantification technology that does not require antibody development. Serum amyloid A (SAA) is a positive acute-phase protein identified as a lung cancer biomarker in our previous study. Acute SAA exists in two isoforms with highly similar (92%) amino acid sequences. Until now, studies of SAA have been unable to distinguish between SAA1 and SAA2. To overcome the unavailability of a SAA2-specific antibody, we developed MRM methodology for the verification of SAA1 and SAA2 in clinical crude serum samples from 99 healthy controls and 100 lung adenocarcinoma patients. Differential measurement of SAA1 and SAA2 was made possible for the first time with the developed isotype-specific MRM method. Most healthy control samples had small or no MS/MS peaks of the targeted peptides otherwise, higher peak areas with 10- to 34-fold increase over controls were detected in lung cancer samples. In addition, our SAA1 MRM data demonstrated good agreement with the SAA1 enzyme-linked immunosorbent assay (ELISA) data. Finally, successful quantification of SAA2 in crude serum by MRM, for the first time, shows that SAA2 can be a good biomarker for the detection of lung cancers.
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Affiliation(s)
- Hye-Jin Sung
- Department of Biochemistry, BK21 and Research Institute for Veterinary Science College of veterinary Medicine, Seoul National University, Seoul and ProtAnBio, Daegu, Republic of Korea
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Ahn YH, Kim KH, Shin PM, Ji ES, Kim H, Yoo JS. Identification of low-abundance cancer biomarker candidate TIMP1 from serum with lectin fractionation and peptide affinity enrichment by ultrahigh-resolution mass spectrometry. Anal Chem 2012; 84:1425-31. [PMID: 22196688 DOI: 10.1021/ac2024987] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
As investigating a proteolytic target peptide originating from the tissue inhibitor of metalloproteinase 1 (TIMP1) known to be aberrantly glycosylated in patients with colorectal cancer (CRC), we first confirmed that TIMP1 is to be a CRC biomarker candidate in human serum. For this, we utilized matrix-assisted laser desorption/ionization (MALDI) Fourier transform ion cyclotron resonance (FTICR) mass spectrometry (MS) showing ultrahigh-resolution and high mass accuracy. This investigation used phytohemagglutinin-L(4) (L-PHA) lectin, which shows binding affinity to the β-1,6-N-acetylglucosamine moiety of N-linked glycan on a protein, to compare fractionated aberrant protein glycoforms from both noncancerous control and CRC serum. Each lectin-captured fraction containing aberrant glycoforms of TIMP1 was digested by trypsin, resulting in the tryptic target peptide, representative of the serum glycoprotein TIMP1. The resulting target peptide was enriched using a stable isotope standard and capture by the antipeptide antibody (SISCAPA) technique and analyzed by a 15 T MALDI FTICR mass spectrometer with high mass accuracy (Δ < 0.5 ppm to the theoretical mass value of the target peptide). Since exact measurement of multiplex isotopic peaks of the target peptide could be accomplished by virtue of high mass resolution (Rs > 400,000), robust identification of the target peptide is only achievable with 15 T FTICR MS. Also, MALDI data obtained in this study showed that the L-PHA-captured glycoforms of TIMP1 were measured in the pooled CRC serum with about 5 times higher abundance than that in the noncancerous serum, and were further proved by MRM mass analysis. These results confirm that TIMP1 in human serum is a potent CRC biomarker candidate, demonstrating that ultrahigh-resolution MS can be a powerful tool toward identifying and verifying potential protein biomarker candidates.
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Affiliation(s)
- Yeong Hee Ahn
- Division of Mass Spectrometry, Korea Basic Science Institute, Ochang-Myun, Cheongwon-Gun, Republic of Korea
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Ahn YH, Shin PM, Ji ES, Kim H, Yoo JS. A lectin-coupled, multiple reaction monitoring based quantitative analysis of human plasma glycoproteins by mass spectrometry. Anal Bioanal Chem 2012; 402:2101-12. [DOI: 10.1007/s00216-011-5646-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Revised: 12/01/2011] [Accepted: 12/07/2011] [Indexed: 10/14/2022]
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Ahn YH, Kim KH, Shin PM, Ji ES, Yoo JS. Mass Spectrometry for Analysis of Cancer Biomarker from Human Plasma. J Anal Sci Technol 2011. [DOI: 10.5355/jast.2011.a135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Ahn YH, Ji ES, Shin PM, Kim KH, Kim YS, Ko JH, Yoo JS. A multiplex lectin-channel monitoring method for human serum glycoproteins by quantitative mass spectrometry. Analyst 2011; 137:691-703. [PMID: 22158852 DOI: 10.1039/c1an15775b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A mass profiling method and multiple reaction monitoring (MRM)-based quantitative approach were used to analyze multiple lectin-captured fractions of human serum using different lectins such as aleuria aurantia lectin (AAL), phytohemagglutinin-L(4) (L-PHA), concanavalin A (Con A), and Datura stramonium agglutinin (DSA) to quantitatively monitor protein glycosylation diversity. Each fraction, prepared by multiple lectin-fractionation and tryptic digestion, was analyzed by 1-D LC-MS/MS. Semi-quantitative profiling showed that the list of glycoproteins identified from each lectin-captured fraction is significantly different according to the used lectin. Thus, it was confirmed that the multiplex lectin-channel monitoring (LCM) using multiple lectins is useful for investigating protein glycosylation diversity in a proteome sample. Based on the semi-quantitative mass profiling, target proteins showing lectin-specificity among each lectin-captured fraction were selected and analyzed by the MRM-based method in triplicate using each lectin-captured fraction (average CV 7.9%). The MRM-based analysis for each lectin-captured fraction was similar to those obtained by the profiling experiments. The abundance of each target protein measured varied dramatically, based on the lectin-specificity. The multiplex LCM approach using MRM-based analyses is useful for quantitatively monitoring target protein glycoforms selectively fractionated by multiple lectins. Thus through multiplex LCM rather than single, we could inquire minutely into protein glycosylation states.
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Affiliation(s)
- Yeong Hee Ahn
- Division of Mass Spectrometry, Korea Basic Science Institute, 804-1 Yangcheong-Ri, Ochang-Myun, Cheongwon-Gun, 363-883, Republic of Korea
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68
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Lee JY, Kim JY, Park GW, Cheon MH, Kwon KH, Ahn YH, Moon MH, Lee HJ, Paik YK, Yoo JS. Targeted mass spectrometric approach for biomarker discovery and validation with nonglycosylated tryptic peptides from N-linked glycoproteins in human plasma. Mol Cell Proteomics 2011; 10:M111.009290. [PMID: 21940909 DOI: 10.1074/mcp.m111.009290] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
A simple mass spectrometric approach for the discovery and validation of biomarkers in human plasma was developed by targeting nonglycosylated tryptic peptides adjacent to glycosylation sites in an N-linked glycoprotein, one of the most important biomarkers for early detection, prognoses, and disease therapies. The discovery and validation of novel biomarkers requires complex sample pretreatment steps, such as depletion of highly abundant proteins, enrichment of desired proteins, or the development of new antibodies. The current study exploited the steric hindrance of glycan units in N-linked glycoproteins, which significantly affects the efficiency of proteolytic digestion if an enzymatically active amino acid is adjacent to the N-linked glycosylation site. Proteolytic digestion then results in quantitatively different peptide products in accordance with the degree of glycosylation. The effect of glycan steric hindrance on tryptic digestion was first demonstrated using alpha-1-acid glycoprotein (AGP) as a model compound versus deglycosylated alpha-1-acid glycoprotein. Second, nonglycosylated tryptic peptide biomarkers, which generally show much higher sensitivity in mass spectrometric analyses than their glycosylated counterparts, were quantified in human hepatocellular carcinoma plasma using a label-free method with no need for N-linked glycoprotein enrichment. Finally, the method was validated using a multiple reaction monitoring analysis, demonstrating that the newly discovered nonglycosylated tryptic peptide targets were present at different levels in normal and hepatocellular carcinoma plasmas. The area under the receiver operating characteristic curve generated through analyses of nonglycosylated tryptic peptide from vitronectin precursor protein was 0.978, the highest observed in a group of patients with hepatocellular carcinoma. This work provides a targeted means of discovering and validating nonglycosylated tryptic peptides as biomarkers in human plasma, without the need for complex enrichment processes or expensive antibody preparations.
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Affiliation(s)
- Ju Yeon Lee
- Division of Mass Spectrometry, Korea Basic Science Institute, Ochang-Myun, Cheongwon-Gun, Republic of Korea
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69
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Yun SH, Park GW, Kim JY, Kwon SO, Choi CW, Leem SH, Kwon KH, Yoo JS, Lee C, Kim S, Kim SI. Proteomic characterization of the Pseudomonas putida KT2440 global response to a monocyclic aromatic compound by iTRAQ analysis and 1DE-MudPIT. J Proteomics 2011; 74:620-8. [DOI: 10.1016/j.jprot.2011.01.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 01/19/2011] [Accepted: 01/31/2011] [Indexed: 11/28/2022]
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Adare A, Afanasiev S, Aidala C, Ajitanand NN, Akiba Y, Akimoto R, Alexander J, Al-Ta'ani H, Andrews KR, Angerami A, Aoki K, Apadula N, Appelt E, Aramaki Y, Armendariz R, Aschenauer EC, Awes TC, Azmoun B, Babintsev V, Bai M, Bannier B, Barish KN, Bassalleck B, Basye AT, Bathe S, Baublis V, Baumann C, Bazilevsky A, Belmont R, Ben-Benjamin J, Bennett R, Berdnikov A, Berdnikov Y, Blau DS, Bok JS, Boyle K, Brooks ML, Broxmeyer D, Buesching H, Bumazhnov V, Bunce G, Butsyk S, Campbell S, Caringi A, Castera P, Chen CH, Chi CY, Chiu M, Choi IJ, Choi JB, Choudhury RK, Christiansen P, Chujo T, Chvala O, Cianciolo V, Citron Z, Cole BA, Conesa del Valle Z, Connors M, Csanád M, Csörgo T, Dairaku S, Datta A, David G, Dayananda MK, Denisov A, Deshpande A, Desmond EJ, Dharmawardane KV, Dietzsch O, Dion A, Donadelli M, D'Orazio L, Drapier O, Drees A, Drees KA, Durham JM, Durum A, Efremenko YV, Engelmore T, Enokizono A, En'yo H, Esumi S, Fadem B, Fields DE, Finger M, Finger M, Fleuret F, Fokin SL, Frantz JE, Franz A, Frawley AD, Fukao Y, Fusayasu T, Garishvili I, Glenn A, Gong X, Gonin M, Goto Y, Granier de Cassagnac R, Grau N, Greene SV, Grosse Perdekamp M, Gunji T, Guo L, Gustafsson HÅ, Haggerty JS, Hahn KI, Hamagaki H, Hamblen J, Hanks J, Han R, Harper C, Hashimoto K, Haslum E, Hayano R, Hemmick TK, Hester T, He X, Hill JC, Hollis RS, Holzmann W, Homma K, Hong B, Horaguchi T, Hori Y, Hornback D, Huang S, Ichihara T, Ichimiya R, Iinuma H, Ikeda Y, Imai K, Inaba M, Iordanova A, Isenhower D, Ishihara M, Issah M, Isupov A, Ivanischev D, Iwanaga Y, Jacak BV, Jia J, Jiang X, Johnson BM, Jones T, Joo KS, Jouan D, Kamin J, Kaneti S, Kang BH, Kang JH, Kang JS, Kapustinsky J, Karatsu K, Kasai M, Kawall D, Kazantsev AV, Kempel T, Khanzadeev A, Kijima KM, Kim BI, Kim DJ, Kim EJ, Kim YJ, Kim YK, Kinney E, Kiss Á, Kistenev E, Kleinjan D, Kline P, Kochenda L, Komkov B, Konno M, Koster J, Kotov D, Král A, Kunde GJ, Kurita K, Kurosawa M, Kwon Y, Kyle GS, Lacey R, Lai YS, Lajoie JG, Lebedev A, Lee DM, Lee J, Lee KB, Lee KS, Lee SH, Lee SR, Leitch MJ, Leite MAL, Lichtenwalner P, Lim SH, Linden Levy LA, Litvinenko A, Liu H, Liu MX, Li X, Love B, Lynch D, Maguire CF, Makdisi YI, Malakhov A, Manion A, Manko VI, Mannel E, Mao Y, Masui H, McCumber M, McGaughey PL, McGlinchey D, McKinney C, Means N, Mendoza M, Meredith B, Miake Y, Mibe T, Mignerey AC, Miki K, Milov A, Mitchell JT, Miyachi Y, Mohanty AK, Moon HJ, Morino Y, Morreale A, Morrison DP, Motschwiller S, Moukhanova TV, Murakami T, Murata J, Nagamiya S, Nagle JL, Naglis M, Nagy MI, Nakagawa I, Nakamiya Y, Nakamura KR, Nakamura T, Nakano K, Newby J, Nguyen M, Nihashi M, Nouicer R, Nyanin AS, Oakley C, O'Brien E, Ogilvie CA, Okada K, Oka M, Oskarsson A, Ouchida M, Ozawa K, Pak R, Pantuev V, Papavassiliou V, Park BH, Park IH, Park SK, Pate SF, Pei H, Peng JC, Pereira H, Peresedov V, Peressounko DY, Petti R, Pinkenburg C, Pisani RP, Proissl M, Purschke ML, Qu H, Rak J, Ravinovich I, Read KF, Reygers K, Riabov V, Riabov Y, Richardson E, Roach D, Roche G, Rolnick SD, Rosati M, Rosendahl SSE, Rukoyatkin P, Sahlmueller B, Saito N, Sakaguchi T, Samsonov V, Sano S, Sarsour M, Sato T, Savastio M, Sawada S, Sedgwick K, Seidl R, Seto R, Sharma D, Shein I, Shibata TA, Shigaki K, Shim HH, Shimomura M, Shoji K, Shukla P, Sickles A, Silva CL, Silvermyr D, Silvestre C, Sim KS, Singh BK, Singh CP, Singh V, Slunečka M, Sodre T, Soltz RA, Sondheim WE, Sorensen SP, Sourikova IV, Stankus PW, Stenlund E, Stoll SP, Sugitate T, Sukhanov A, Sun J, Sziklai J, Takagui EM, Takahara A, Taketani A, Tanabe R, Tanaka Y, Taneja S, Tanida K, Tannenbaum MJ, Tarafdar S, Taranenko A, Tennant E, Themann H, Thomas D, Togawa M, Tomášek L, Tomášek M, Torii H, Towell RS, Tserruya I, Tsuchimoto Y, Utsunomiya K, Vale C, van Hecke HW, Vazquez-Zambrano E, Veicht A, Velkovska J, Vértesi R, Virius M, Vossen A, Vrba V, Vznuzdaev E, Wang XR, Watanabe D, Watanabe K, Watanabe Y, Watanabe YS, Wei F, Wei R, Wessels J, White SN, Winter D, Woody CL, Wright RM, Wysocki M, Yamaguchi YL, Yang R, Yanovich A, Ying J, Yokkaichi S, Yoo JS, Young GR, Younus I, You Z, Yushmanov IE, Zajc WA, Zelenski A, Zhou S, Zolin L. Cross section and parity-violating spin asymmetries of W± boson production in polarized p + p collisions at sqrt[s] = 500 GeV. Phys Rev Lett 2011; 106:062001. [PMID: 21405459 DOI: 10.1103/physrevlett.106.062001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Indexed: 05/30/2023]
Abstract
Large parity-violating longitudinal single-spin asymmetries A(L)(e+) = -0.86(-0.14) (+0.30) and A(L)(e-) = 0.88(-0.71) (+0.12) are observed for inclusive high transverse momentum electrons and positrons in polarized p+p collisions at a center-of-mass energy of sqrt[s] = 500 GeV with the PHENIX detector at RHIC. These e± come mainly from the decay of W± and Z0 bosons, and their asymmetries directly demonstrate parity violation in the couplings of the W± to the light quarks. The observed electron and positron yields were used to estimate W± boson production cross sections for the e± channels of σ(pp → W+ X) × BR(W+ → e+ ν(e)) = 144.1 ± 21.2(stat)(-10.3) (+3.4) (syst) ± 21.6(norm) pb, and σ(pp → W- X) × BR(W- → e- ν[over ¯](e)) = 31.7 ± 12.1(stat)(-8.2) (+10.1) (syst) ± 4.8(norm) pb.
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Affiliation(s)
- A Adare
- University of Colorado, Boulder, Colorado 80309, USA
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Wang JP, Yoo JS, Jang HD, Lee JH, Cho JH, Kim IH. Effect of dietary fermented garlic by Weissella koreensis powder on growth performance, blood characteristics, and immune response of growing pigs challenged with Escherichia coli lipopolysaccharide. J Anim Sci 2011; 89:2123-31. [PMID: 21317348 DOI: 10.2527/jas.2010-3186] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Two experiments were conducted to investigate the effect of fermented garlic by Weissella koreensis powder (WKG) on pig growth performance and immune responses after an Escherichia coli lipopolysaccharide (LPS) challenge. In Exp. 1, 120 growing barrows (23.5 ± 0.5 kg of BW and 56 d of age) were used in a 35-d experiment to determine the optimal amounts of WKG. Pigs were randomly allotted to 1 of 5 treatments with 6 replicate pens and 4 pigs per pen. Dietary treatments included 1) NC (negative control; basal diet without antibiotics), 2) PC (positive control; basal diet + 1 g of tylosin/kg), 3) WKG1 (basal diet + 1 g of WKG/kg), 4) WKG2 (basal diet + 2 g of WKG/kg), and 5) basal diet + 4 g of WKG/kg. At the end of the feeding period, 12 pigs each were selected from the NC and WKG2 treatment groups, and 6 pigs were injected with LPS (50 μg/kg of BW) and the other 6 pigs with an equivalent amount of sterile saline, resulting in a 2 × 2 factorial arrangement of treatments. Blood samples and rectal temperature data were collected at 0, 2, 4, 6, 8, and 12 h after challenge. The ADG of pigs fed WKG- and antibiotic-supplemented diets was greater (P<0.05) than NC from d 14 to 35 and the overall phase, but no dosage-dependent effects were observed. At the end of the experiment, the fecal E. coli count was linearly reduced by the increasing amounts of WKG at d 35 (P=0.01). Challenge with LPS increased white blood cell counts at 6 and 8 h (P<0.01) and depressed lymphocyte concentration at 4, 8, and 12 h (P<0.01). During challenge, LPS injection increased rectal temperature at 2, 4, 6, and 8 h postchallenge (P<0.05), and WKG2 alleviated (P<0.05) the increase in the temperature at 2 h postchallenge. The LPS injection increased plasma tumor necrosis factor-α and IGF-1 concentrations at 2, 4, 6, 8, and 12 h (P<0.01), whereas an alleviating effect of WKG was observed at 4, 6, and 8 h after LPS challenge (P<0.05). At 2, 4, and 6 h postchallenge, concentration of cluster of differentiation-antigen-4-positive cells and cluster of differentiation-antigen-8-positive cells (CD4(+) and CD8(+), respectively) increased in the LPS treatments (P<0.05), and the WKG2 boosted this effect (P<0.05). In conclusion, dietary supplementation of WKG2 in growing pigs can improve ADG and have a beneficial effect on the immune response during an inflammatory challenge.
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Affiliation(s)
- J P Wang
- Department of Animal Resource and Science, Dankook University, Cheonan, Choongnam 330-714, Republic of Korea
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Kim YH, Park KH, Kim SY, Ji ES, Kim JY, Lee SK, Yoo JS, Kim HS, Park YM. Identification of trimethylation at C-terminal lysine of pilin in the cyanobacterium Synechocystis PCC 6803. Biochem Biophys Res Commun 2010; 404:587-92. [PMID: 21130745 DOI: 10.1016/j.bbrc.2010.11.133] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Accepted: 11/24/2010] [Indexed: 12/13/2022]
Abstract
Various post-translational modifications (PTMs) of pilin in Synechocystis sp. PCC 6803 have been proposed. In this study, we investigated previously unidentified PTMs of pilin by mass spectrometry (MS). MALDI-TOF MS and TOF/TOF MS showed that the molecular mass of the C-terminal lysine of pilin was increased by 42Da, which could represent acetylation (ΔM=42.0470) or trimethylation (ΔM=42.0106). To discriminate between these isobaric modifications, the molecular mass of the C-terminal tryptic peptide was measured using 15T Fourier transform ion cyclotron resonance (FT-ICR) MS. The high magnetic field FT-ICR provided sub-ppm mass accuracy, revealing that the C-terminal lysine was modified by trimethylation. We could also detect the existence of mono- and di-methylation of the C-terminal lysine. Cells expressing a pilin point mutant with glutamine replacing the C-terminal lysine showed dramatically reduced motility and short pili. These findings suggest that trimethylation of pilin at the C-terminal lysine may be essential for the biogenesis of functional pili.
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Affiliation(s)
- Young Hye Kim
- Mass Spectrometry Research Center, Korea Basic Science Institute, Ochang 363-883, South Korea
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Ahmed A, Cho YJ, No MH, Koh J, Tomczyk N, Giles K, Yoo JS, Kim S. Application of the Mason−Schamp Equation and Ion Mobility Mass Spectrometry To Identify Structurally Related Compounds in Crude Oil. Anal Chem 2010; 83:77-83. [DOI: 10.1021/ac101934q] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Arif Ahmed
- Department of Chemistry, Kyungpook National University, Daegu, Korea, SK Energy Institute of Technology, Daejeon, Korea, Waters MS Technologies Centre, Manchester, United Kingdom, and Mass Spectrometry Group, Korean Basic Science Institute, Daejeon, Korea
| | - Yun Ju Cho
- Department of Chemistry, Kyungpook National University, Daegu, Korea, SK Energy Institute of Technology, Daejeon, Korea, Waters MS Technologies Centre, Manchester, United Kingdom, and Mass Spectrometry Group, Korean Basic Science Institute, Daejeon, Korea
| | - Myoung-han No
- Department of Chemistry, Kyungpook National University, Daegu, Korea, SK Energy Institute of Technology, Daejeon, Korea, Waters MS Technologies Centre, Manchester, United Kingdom, and Mass Spectrometry Group, Korean Basic Science Institute, Daejeon, Korea
| | - Jaesuk Koh
- Department of Chemistry, Kyungpook National University, Daegu, Korea, SK Energy Institute of Technology, Daejeon, Korea, Waters MS Technologies Centre, Manchester, United Kingdom, and Mass Spectrometry Group, Korean Basic Science Institute, Daejeon, Korea
| | - Nicholas Tomczyk
- Department of Chemistry, Kyungpook National University, Daegu, Korea, SK Energy Institute of Technology, Daejeon, Korea, Waters MS Technologies Centre, Manchester, United Kingdom, and Mass Spectrometry Group, Korean Basic Science Institute, Daejeon, Korea
| | - Kevin Giles
- Department of Chemistry, Kyungpook National University, Daegu, Korea, SK Energy Institute of Technology, Daejeon, Korea, Waters MS Technologies Centre, Manchester, United Kingdom, and Mass Spectrometry Group, Korean Basic Science Institute, Daejeon, Korea
| | - Jong Shin Yoo
- Department of Chemistry, Kyungpook National University, Daegu, Korea, SK Energy Institute of Technology, Daejeon, Korea, Waters MS Technologies Centre, Manchester, United Kingdom, and Mass Spectrometry Group, Korean Basic Science Institute, Daejeon, Korea
| | - Sunghwan Kim
- Department of Chemistry, Kyungpook National University, Daegu, Korea, SK Energy Institute of Technology, Daejeon, Korea, Waters MS Technologies Centre, Manchester, United Kingdom, and Mass Spectrometry Group, Korean Basic Science Institute, Daejeon, Korea
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Yun SH, Choi CW, Kwon SO, Park GW, Cho K, Kwon KH, Kim JY, Yoo JS, Lee JC, Choi JS, Kim S, Kim SI. Quantitative proteomic analysis of cell wall and plasma membrane fractions from multidrug-resistant Acinetobacter baumannii. J Proteome Res 2010; 10:459-69. [PMID: 21053951 DOI: 10.1021/pr101012s] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Acinetobacter baumannii is a Gram-negative, nonmotile aerobic bacterium that has emerged as an important nosocomial pathogen. Multidrug-resistant (MDR) A. baumannii is difficult to treat with antibiotics, and treatment failure in infected patients is of great concern in clinical settings. To investigate proteome regulation in A. baumannii under antibiotic stress conditions, quantitative membrane proteomic analyses of a clinical MDR A. baumannii strain cultured in subminimal inhibitory concentrations of tetracycline and imipenem were performed using a combination of label-free (one-dimensional electrophoresis-liquid chromatography-tandem mass spectrometry) and label (isobaric tag for relative and absolute quantitation) approaches. In total, 484 proteins were identified, and 302 were classified as outer membrane, periplasmic, or plasma membrane proteins. The clinical A. baumannii strain DU202 responded specifically and induced different cell wall and membrane protein sets that provided resistance to the antibiotics. The induction of resistance-nodulation-cell division transporters and protein kinases, and the repression of outer membrane proteins were common responses in the presence of tetracycline and imipenem. Induction of a tetracycline resistant pump, ribosomal proteins, and iron-uptake transporters appeared to be dependent on tetracycline conditions, whereas β-lactamase and penicillin-binding proteins appeared to be dependent on imipenem conditions. These results suggest that combined liquid chromatography-based proteomic approaches can be used to identify cell wall and membrane proteins involved in the antibiotic resistance of A. baumannii.
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Affiliation(s)
- Sung-Ho Yun
- Division of Life Science, Korea Basic Science Institute, Daejeon, Korea
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75
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Kang D, Ji ES, Moon MH, Yoo JS. Lectin-based enrichment method for glycoproteomics using hollow fiber flow field-flow fractionation: application to Streptococcus pyogenes. J Proteome Res 2010; 9:2855-62. [PMID: 20377246 DOI: 10.1021/pr900937w] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
This paper presents a new application of hollow fiber flow field-flow fractionation (HF5) as a preparative method to preconcentrate high mannose type N-linked glycoproteins from Streptococcus pyogenes by means of the mannose-specific binding affinity between concanavalian A (ConA) and N-linked glycosylated proteins. Prior to fractionation of N-linked glycoproteins from bacterial lysates, it was examined that ConA formed several types of multimers depending on the pH values (4, 6, and 8) of the carrier solution and it was confirmed that the molecular weight (MW) of ConA, spiked with alpha-1 acid glycoprotein (AGP) as a standard glycoprotein, increased due to binding with the mannose moiety of AGP. After adding ConA to bacterial lysates, mannose type N-linked glycoproteins were found to be enriched when the ConA fraction was isolated from whole bacterial lysates through HF5 run. For the identification of glycoproteins, the ConA fraction of HF5 was tryptically digested and followed by two-dimensional nanoflow strong cation exchange-reversed phase liquid chromatography-electrospray ionization-tandem mass spectrometry (2D SCX-RPLC-ESI-MS-MS) analysis to identify the N-linked glycoprotein species. From two-dimensional shotgun analyses, 45 proteins that exist on the Asn-Xaa-Ser/Thr sequence were identified as high mannose type N-linked glycoprotein. As a result, it was first demonstrated that HF5 is an alternative tool to enrich high mannose type N-linked glycoproteins using ConA-specific binding affinity.
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Affiliation(s)
- Dukjin Kang
- Mass Spectrometry Research Center, Korea Basic Science Institute, Chungcheongbuk-Do, Korea
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76
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Kim YS, Jung JA, Kim HJ, Ahn YH, Yoo JS, Oh S, Cho C, Yoo HS, Ko JH. Galectin-3 binding protein promotes cell motility in colon cancer by stimulating the shedding of protein tyrosine phosphatase kappa by proprotein convertase 5. Biochem Biophys Res Commun 2010; 404:96-102. [PMID: 21094132 DOI: 10.1016/j.bbrc.2010.11.071] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Accepted: 11/16/2010] [Indexed: 01/11/2023]
Abstract
It has previously been reported that shedding of the PTPκ ectodomain drives enhanced motility of colon cancer cells. Herein, we provide mechanism underlying the regulation of PTPκ shedding by galectin-3 binding protein. PTPκ was inarguably scissored by the processed form of proprotein convertase 5 (subtilisin/kexin type 5), and galectin-3 binding protein which is over-produced in colon cancer cells and tissues contributed to increased cancer cell motility by acting as a negative regulator of galectin-3 at the cell surface. The high expression ratio of galectin-3 binding protein to galectin-3 was clinically correlated to lymphatic invasion. These results suggest that galectin-3 binding protein may be a potential therapeutic target for treatment of, at least, colon cancer patients with high expression of galectin-3 binding protein.
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Affiliation(s)
- Yong-Sam Kim
- Daejeon-KRIBB-FHCRC Research Cooperation Center, KRIBB, Daejeon 305-806, South Korea
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77
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Lee H, Shin N, Song M, Kang UB, Yeom J, Lee C, Ahn YH, Yoo JS, Paik YK, Kim H. Analysis of Nuclear High Mobility Group Box 1 (HMGB1)-Binding Proteins in Colon Cancer Cells: Clustering with Proteins Involved in Secretion and Extranuclear Function. J Proteome Res 2010; 9:4661-70. [DOI: 10.1021/pr100386r] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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78
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Ahn YH, Kim YS, Ji ES, Lee JY, Jung JA, Ko JH, Yoo JS. Comparative quantitation of aberrant glycoforms by lectin-based glycoprotein enrichment coupled with multiple-reaction monitoring mass spectrometry. Anal Chem 2010; 82:4441-7. [PMID: 20462175 DOI: 10.1021/ac1001965] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Lectin enrichment-coupled multiple-reaction monitoring (MRM) mass spectrometry was employed to quantitatively monitor the variation of aberrant glycoforms produced under pathological states. For this, aberrant glycoforms of the tissue inhibitor of metalloproteinase 1 (TIMP1) and protein tyrosine phosphatase kappa (PTPkappa), previously known target proteins for N-acetylglucosaminyltransferase-V (GnT-V), were enriched by phytohemagglutinin-L(4) (L-PHA) lectin and comparatively analyzed in the conditioned medium of the WiDr colon cancer cell line and its GnT-V-overexpressing transfectant cells. Enriched glycoforms were digested, and the resultant peptides were comparatively quantified by MRM analysis. MRM quantitation data for the L-PHA-enriched samples revealed that the abundance of aberrant glycoforms of TIMP1 and PTPkappa was greatly increased (11.7- and 16.5-fold, respectively) in GnT-V-treated cells compared to the control cells, although the abundance of total TIMP1 and PTPkappa in GnT-V-treated cells was slightly different (1.1- and 0.5-fold, respectively) for unenriched samples compared to that in control cells. The dramatic variation in abundance of the aberrant glycoforms due to overexpressed GnT-V was confirmed quantitatively by comparative MRM analysis of lectin-enriched samples. This method is capable of comparatively quantitating the abundance of a protein of interest and its aberrant glycoform and will be useful for studying pathological mechanisms of cancer or verifying biomarker candidates.
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Affiliation(s)
- Yeong Hee Ahn
- Division of Mass Spectrometry, Korea Basic Science Institute, Ochang-Myun, Cheongwon-Gun 363-883, Republic of Korea
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79
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Heo CK, Woo MK, Yu DY, Lee JY, Yoo JS, Yoo HS, Ko JH, Kim JM, Choi JY, Kim IG, Paik SG, Cho EW. Identification of autoantibody against fatty acid synthase in hepatocellular carcinoma mouse model and its application to diagnosis of HCC. Int J Oncol 2010; 36:1453-9. [PMID: 20428769 DOI: 10.3892/ijo_00000631] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Autoantibodies, which are generated by immune system recognizing the presence of the abnormal tumor-associated antigens, are promising biomarkers for early detection of tumors. Recently, we established a B cell hybridoma pool derived from H-ras12V transgenic mouse, a typical hepatocellular carcinoma model, as a source of tumor-associated autoantibodies without using any extracellular antigens and have characterized the specific target antigens against them. K1 autoantibody, one of them, was investigated in this study and its target antigen was identified by mass spectrometric analysis as fatty acid synthase (FASN), an important oncogenic protein. Moreover, a specific mimotope against K1 autoantibody was screened from the cyclic random hepta-peptide phage library and, using it as a coating antigen for ELISA, we could distinguish patients with hepatocellular carcinoma (HCC) vs. normal subjects with 96.55% sensitivity and 100% specificity. These results imply that anti-FASN autoantibody is induced in patients with HCC and detection of anti-FASN autoantibody can be used for the diagnosis of HCC.
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Affiliation(s)
- Chang-Kyu Heo
- Daejeon-KRIBB-FHCRC Research Cooperation Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Yuseong-gu, Daejeon 305-860, Korea
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80
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Choi S, Kim J, Cho K, Park G, Yoon JH, Park S, Yoo JS, Ryu SH, Kim YH, Kim J. Sequential Fe3O4/TiO2 enrichment for phosphopeptide analysis by liquid chromatography/tandem mass spectrometry. Rapid Commun Mass Spectrom 2010; 24:1467-74. [PMID: 20411586 DOI: 10.1002/rcm.4541] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Protein phosphorylation regulates a wide range of cellular functions and is associated with signaling pathways in cells. Various strategies for enrichment of phosphoproteins or phosphopeptides have been developed. Here, we developed a novel sequential phosphopeptide enrichment method, using magnetic iron oxide (Fe(3)O(4)) and titanium dioxide (TiO(2)) particles, to detect mono- and multi-phosphorylated peptides. In the first step, phosphopeptides were captured on Fe(3)O(4) particles. In a subsequent step, any residual phosphopeptides were captured on TiO(2) particles. The particles were eluted and rinsed to yield phosphopeptide-enriched fractions that were combined and analyzed using liquid chromatography/tandem mass spectrometry (LC/MS/MS). The validity of this sequential Fe(3)O(4)/TiO(2) enrichment strategy was demonstrated by the successful enrichment of bovine alpha-casein phosphopeptides. We then applied the sequential Fe(3)O(4)/TiO(2) enrichment method to the analysis of phosphopeptides in L6 muscle cell lysates and successfully identified mono- and multi-phosphorylated peptides.
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Affiliation(s)
- Sunkyu Choi
- Division of Molecular and Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
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81
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Abstract
BACKGROUND AND PURPOSE ORN is a postradiation complication that has been well-documented in the medical literature. Most cases in the head and neck have been described in the mandible or larynx. Only a handful of cases in the hyoid bone are documented, all in the clinical literature. Our purpose is to present the clinical and imaging features of ORN involving the hyoid bone. MATERIALS AND METHODS We present a case series of 13 patients with imaging findings highly suggestive of hyoid ORN after radiation therapy for head and neck cancers, in which we observed progressive features of hyoid disruption along with adjacent soft-tissue ulceration. RESULTS Pretreatment imaging, when available, showed a normal hyoid. Typical postradiation imaging findings included an initial tongue base ulcerative lesion with air approaching the hyoid bone, and subsequent observation of hyoid fragmentation, often with intraosseous or peri-hyoid air and the absence of associated mass-like enhancement. CONCLUSIONS Findings of hyoid fragmentation, cortical disruption, and soft tissue or intraosseous air in the postradiation therapy patient should strongly suggest the diagnosis of hyoid ORN. It is important recognize this entity because the diagnosis may preclude potentially harmful diagnostic intervention and allow more appropriate therapy.
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Affiliation(s)
- J S Yoo
- Department of Diagnostic Radiology, University of Texas MD Anderson Cancer Center, Houston, 77030, USA
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82
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Nam JS, Nam JY, Yoo JS, Cho M, Park JS, Ahn CW, Cha BS, Lee EJ, Lim SK, Kim KR, Lee HC. The effect of mosapride (5HT-4 receptor agonist) on insulin sensitivity and GLUT4 translocation. Diabetes Res Clin Pract 2010; 87:329-34. [PMID: 20060191 DOI: 10.1016/j.diabres.2009.12.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2009] [Revised: 12/09/2009] [Accepted: 12/15/2009] [Indexed: 01/08/2023]
Abstract
AIMS We investigated the effect of mosapride, 5HT-4 (5-hydroxytryptamine) agonist, on blood glucose level and insulin sensitivity in subjects with impaired glucose tolerance (IGT) and conducted an in vitro study to evaluate the action mechanism. METHODS Thirty IGT patients were randomly assigned to receive either mosapride or placebo for 2 weeks. Biochemical profiles and insulin sensitivity index from euglycemic hyperinsulinemic clamp test were assessed before and after treatment. In cultured myotubes from human skeletal muscle cells, insulin- and mosapride-induced GLUT4 translocation and tyrosine phosphorylation of IRS-1 were determined. RESULTS After 2 weeks of treatment with mosapride, glucose disposal rates were significantly increased up to those of control (mosapride 5.47+/-1.72 vs 7.06+/-2.13, P=0.004, placebo 5.42+/-1.85 vs 5.23+/-1.53mgkg(-1)min(-1)). Fasting plasma glucose (FPG) and insulin levels were decreased. Mosapride increased the contents of GLUT4 in plasma membrane representing the increased recruitment of glucose transporters from intracellular pool. While insulin treatment on human skeletal muscle cell resulted in an increased tyrosine phosphorylation of IRS-1, mosapride did not have any effect. CONCLUSIONS Mosapride is effective in decreasing FPG without stimulating insulin secretion in IGT subjects, possibly by inducing GLUT4 translocation in skeletal muscles.
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Affiliation(s)
- J S Nam
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
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83
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Choi MC, Park KH, Kim S, Yoo JS, Kim HS. Improved ion transmission through the gate valve of a new hybrid ion guide for Fourier transform ion cyclotron resonance mass spectrometry. Rapid Commun Mass Spectrom 2010; 24:469-472. [PMID: 20073079 DOI: 10.1002/rcm.4419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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84
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Nam JS, Nam JY, Yoo JS, Cho M, Park JS, Ahn CW, Cha BS, Lee EJ, Lim SK, Kim KR, Lee HC. The effect of rosiglitazone on insulin sensitivity and mid-thigh low-density muscle in patients with Type 2 diabetes. Diabet Med 2010; 27:30-6. [PMID: 20121886 DOI: 10.1111/j.1464-5491.2009.02897.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS We examined the effect of rosiglitazone on insulin sensitivity, abdominal fat and mid-thigh intramuscular fat distribution, and plasma concentrations of adipocytokines in patients with Type 2 diabetes. METHODS Rosiglitazone was administered at a daily dose of 4 mg to 42 Type 2 diabetes patients [age 32-70 years, body mass index (BMI) 17.5-32.6 kg/m(2), 15 women, 27 men] for 12 weeks. Various anthropometric and metabolic profiles, plasma adiponectin, leptin, and resistin levels were measured, and insulin resistance was calculated from the short insulin tolerance test. Body fat composition was assessed by computed tomography. RESULTS Twelve weeks' rosiglitazone treatment resulted in improved insulin resistance despite increases in body weight and BMI. There was a significant decrease in abdominal visceral adipose tissue area (145 +/- 65.6 vs. 129 +/- 73.1 cm(2), P = 0.049). Mid-thigh low-density muscle area (TLDMA) increased from 23 +/- 9.6 to 26 +/- 8.2 cm(2) (P = 0.009). There were significant changes in plasma adipocytokines, but they were not significantly correlated with changes in insulin resistance. CONCLUSIONS Rosiglitazone treatment resulted in an improvement of insulin responsiveness in Type 2 diabetic subjects, which was associated with the redistribution of visceral and subcutaneous adipose tissue, an increase in TLDMA, and changes in serum adipocytokine levels. Further studies are needed to elucidate the insulin sensitizing mechanism of rosiglitazone on peripheral skeletal muscles.
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Affiliation(s)
- J S Nam
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
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85
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Lee SK, Kim Y, Kim SS, Lee JH, Cho K, Lee SS, Lee ZW, Kwon KH, Kim YH, Suh-Kim H, Yoo JS, Park YM. Differential expression of cell surface proteins in human bone marrow mesenchymal stem cells cultured with or without basic fibroblast growth factor containing medium. Proteomics 2009; 9:4389-405. [PMID: 19655310 DOI: 10.1002/pmic.200900165] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Mesenchymal stem cells (MSCs) are multipotent cells, which have the capability to differentiate into various mesenchymal tissues such as bone, cartilage, fat, tendon, muscle, and marrow stroma. However, they lose the capability of multi-lineage differentiation after several passages. It is known that basic fibroblast growth factor (bFGF) increases growth rate, differentiation potential, and morphological changes of MSCs in vitro. In this report, we have used 2-DE coupled to MS to identify differentially expressed proteins at the cell membrane level in MSCs growing in bFGF containing medium. The cell surface proteins isolated by the biotin-avidin affinity column were separated by 2-DE in triplicate experiments. A total of 15 differentially expressed proteins were identified by quadrupole-time of flight tandem MS. Nine of the proteins were upregulated and six proteins were downregulated in the MSCs cultured with bFGF containing medium. The expression level of three actin-related proteins, F-actin-capping protein subunit alpha-1, actin-related protein 2/3 complex subunit 2, and myosin regulatory light chain 2, was confirmed by Western blot analysis. The results indicate that the expression levels of F-actin-capping protein subunit alpha-1, actin-related protein 2/3 complex subunit 2, and myosin regulatory light chain 2 are important in bFGF-induced morphological change of MSCs.
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Affiliation(s)
- Sang Kwang Lee
- Mass Spectrometry Research Center, Korea Basic Science Institute, Daejeon, Republic of Korea
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86
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Kim YH, Kim JY, Kim SY, Lee JH, Lee JS, Chung YH, Yoo JS, Park YM. Alteration in the glycan pattern of pilin in a nonmotile mutant of Synechocystis sp. PCC 6803. Proteomics 2009; 9:1075-86. [PMID: 19180537 DOI: 10.1002/pmic.200800372] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Pilus-mediated motility is essential for the optimization of photosynthesis and environmental adaptation in the cyanobacterium Synechocystis sp. PCC 6803 (Syn6803). To identify the genes required for pilus-mediated motility in Syn6803, we applied a forward genetic approach using a Tn5 mutant library and reverse genetics using interposon mutagenesis. One of the identified genes, sll0899, bears sequence similarity to acyltransferases and nucleotidyltransferases. The sll0899 gene product is not involved in the transcription or translation of pilA1, which encodes pilin, the major component of pili. Instead, the sll0899::Cm(r) mutant produced pilins with increased molecular mass, suggesting the existence of different PTMs. Using MS, we found that the wild-type (WT) and mutant pilins were glycosylated between amino acids 67 and 75. Analyses by quantitative MS and high-pH anion exchange chromatography (HPAEC) revealed that the glycan in WT pilin is composed of xylose and fucose, whereas an additional sugar, rhamnose, was found in the glycan of sll0899::Cm(r). Our findings suggest that an alteration in the O-linked glycan of pilin is responsible for the loss of pilus-mediated motility in sll0899::Cm(r).
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Affiliation(s)
- Young Hye Kim
- Mass Spectrometry Research Center, Korea Basic Science Institute, Daejeon, South Korea
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Ahn YH, Lee JY, Lee JY, Kim YS, Ko JH, Yoo JS. Quantitative Analysis of an Aberrant Glycoform of TIMP1 from Colon Cancer Serum by L-PHA-Enrichment and SISCAPA with MRM Mass Spectrometry. J Proteome Res 2009; 8:4216-24. [DOI: 10.1021/pr900269s] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yeong Hee Ahn
- Division of Mass Spectrometry, Korea Basic Science Institute, 804-1 Yangcheong-Ri, Ochang-Myun, Cheongwon-Gun 363-883, Republic of Korea, GRAST, Chungnam National University, Daejeon 305-764, Republic of Korea, and Daejeon-KRIBB-FHCRC Research Cooperation Center, KRIBB, 111 Gwahangno, Yuseong-gu, Daejeon 305-806, Republic of Korea
| | - Ji Yeon Lee
- Division of Mass Spectrometry, Korea Basic Science Institute, 804-1 Yangcheong-Ri, Ochang-Myun, Cheongwon-Gun 363-883, Republic of Korea, GRAST, Chungnam National University, Daejeon 305-764, Republic of Korea, and Daejeon-KRIBB-FHCRC Research Cooperation Center, KRIBB, 111 Gwahangno, Yuseong-gu, Daejeon 305-806, Republic of Korea
| | - Ju Yeon Lee
- Division of Mass Spectrometry, Korea Basic Science Institute, 804-1 Yangcheong-Ri, Ochang-Myun, Cheongwon-Gun 363-883, Republic of Korea, GRAST, Chungnam National University, Daejeon 305-764, Republic of Korea, and Daejeon-KRIBB-FHCRC Research Cooperation Center, KRIBB, 111 Gwahangno, Yuseong-gu, Daejeon 305-806, Republic of Korea
| | - Yong-Sam Kim
- Division of Mass Spectrometry, Korea Basic Science Institute, 804-1 Yangcheong-Ri, Ochang-Myun, Cheongwon-Gun 363-883, Republic of Korea, GRAST, Chungnam National University, Daejeon 305-764, Republic of Korea, and Daejeon-KRIBB-FHCRC Research Cooperation Center, KRIBB, 111 Gwahangno, Yuseong-gu, Daejeon 305-806, Republic of Korea
| | - Jeong Heon Ko
- Division of Mass Spectrometry, Korea Basic Science Institute, 804-1 Yangcheong-Ri, Ochang-Myun, Cheongwon-Gun 363-883, Republic of Korea, GRAST, Chungnam National University, Daejeon 305-764, Republic of Korea, and Daejeon-KRIBB-FHCRC Research Cooperation Center, KRIBB, 111 Gwahangno, Yuseong-gu, Daejeon 305-806, Republic of Korea
| | - Jong Shin Yoo
- Division of Mass Spectrometry, Korea Basic Science Institute, 804-1 Yangcheong-Ri, Ochang-Myun, Cheongwon-Gun 363-883, Republic of Korea, GRAST, Chungnam National University, Daejeon 305-764, Republic of Korea, and Daejeon-KRIBB-FHCRC Research Cooperation Center, KRIBB, 111 Gwahangno, Yuseong-gu, Daejeon 305-806, Republic of Korea
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88
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Jeong SK, Kwon MS, Lee EY, Lee HJ, Cho SY, Kim H, Yoo JS, Omenn GS, Aebersold R, Hanash S, Paik YK. BiomarkerDigger: A versatile disease proteome database and analysis platform for the identification of plasma cancer biomarkers. Proteomics 2009; 9:3729-40. [DOI: 10.1002/pmic.200800593] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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89
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Park CH, Chang WH, Yoo JS, Koo G, Kim ST, Kim YH. Alterations in the Default-Mode Network of Cognitively Normal Stroke Patients. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71068-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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90
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Chang WH, Park CH, Yoo JS, Kim ST, Yoo WK, Kim YH. Longitudinal Changes of the Default Mode Network and Cognitive Function of Stroke Patients. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70751-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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91
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Lee SK, Kim Y, Kim S, Lee JH, Cho K, Lee SS, Lee Z, Kwon K, Kim YH, Suh‐Kim H, Yoo JS, Park YM. P4‐276: Differential Expression Of Cell Surface Proteins In Human Bone Marrow Mesenchymal Stem Cells Cultured With Or Without Basic Fibroblast Growth Factor Containing Medium. Alzheimers Dement 2009. [DOI: 10.1016/j.jalz.2009.07.057] [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: 11/24/2022]
Affiliation(s)
| | - Youngtae Kim
- Korea Basic Science IstituteDaejeonRepublic of Korea
| | | | - Jeong Hwa Lee
- Korea Basic Science IstituteDaejeonRepublic of Korea
| | - Kun Cho
- Korea Basic Science IstituteDaejeonRepublic of Korea
| | - Sang Sook Lee
- Korea Basic Science IstituteDaejeonRepublic of Korea
| | - Zee‐Won Lee
- Korea Basic Science IstituteDaejeonRepublic of Korea
| | | | - Young Hye Kim
- Korea Basic Science IstituteDaejeonRepublic of Korea
| | | | - Jong Shin Yoo
- Korea Basic Science IstituteDaejeonRepublic of Korea
- Graduate School of Analytical Science and TechnologyChungnam National UniversityDaejeonRepublic of Korea
| | - Young Mok Park
- Korea Basic Science IstituteDaejeonRepublic of Korea
- Graduate School of Analytical Science and TechnologyChungnam National UniversityDaejeonRepublic of Korea
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92
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Kang D, Yoo JS, Kim MO, Moon MH. A soft preparative method for membrane proteome analysis using frit inlet asymmetrical flow field-flow fractionation: application in a prostatic cancer cell line. J Proteome Res 2009; 8:982-91. [PMID: 19140673 DOI: 10.1021/pr800689y] [Citation(s) in RCA: 12] [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: 11/29/2022]
Abstract
Membrane proteins participate in a number of important biological functions such as signal transduction, molecular transport, and cell-cell interactions. However, due to the nature of membrane proteins, the development of a preparative method that produces a sufficient yield of purified membrane proteins from the cell remains a challenge. In the present study, frit inlet asymmetrical flow field-flow fractionation (FI-AFlFFF) was employed to fractionate membrane fragments containing membrane proteins from free cytoplasmic proteins of prostatic cancer cell (DU145 cell) lysates. The isolated membrane proteins were then digested and analyzed by nanoflow liquid chromatography/tandem mass spectrometry (nLC-ESI-MS-MS). Since fractionation of the cell lysate mixtures containing membrane fragments and cytoplasmic proteins could be achieved based on the differences of their sizes in FI-AFlFFF, membrane fragments were partially isolated from the cytoplasmic proteins and collected. The performance of FI-AFlFFF for prefractionation of the membrane proteome was examined by comparing the number of membrane proteins that were identified with the number identified using an ultracentrifugation method. The application of FI-AFlFFF to membrane proteomics produced an increased yield of purified membrane proteins with fewer cytoplasmic proteins compared to a conventional ultracentrifugation method.
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Affiliation(s)
- Dukjin Kang
- Department of Chemistry, Yonsei University, Seoul, 120-749, South Korea
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93
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Ahn SM, Byun K, Kim D, Lee K, Yoo JS, Kim SU, Jho EH, Simpson RJ, Lee B. Olig2-induced neural stem cell differentiation involves downregulation of Wnt signaling and induction of Dickkopf-1 expression. PLoS One 2008; 3:e3917. [PMID: 19093005 PMCID: PMC2602983 DOI: 10.1371/journal.pone.0003917] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2008] [Accepted: 11/07/2008] [Indexed: 01/17/2023] Open
Abstract
Understanding stem cell-differentiation at the molecular level is important for clinical applications of stem cells and for finding new therapeutic approaches in the context of cancer stem cells. To investigate genome-wide changes involved in differentiation, we have used immortalized neural stem cell (NSC) line (HB1.F3) and Olig2-induced NSC differentiation model (F3.Olig2). Using microarray analysis, we revealed that Olig2-induced NSC differentiation involves downregulation of Wnt pathway, which was further confirmed by TOPflash/FOPflash reporter assay, RT-PCR analysis, immunoblots, and immunocytochemistry. Furthermore, we found that Olig2-induced differentiation induces the expression of Dickkopf-1(Dkk1), a potent antagonist of Wnt signaling. Dkk1 treatment blocked Wnt signaling in HB1.F3 in a dosage-dependent manner, and induced differentiation into astrocytes, oligodendrocytes, and neurons. Our results support cancer stem cell hypothesis which implies that signaling pathway for self-renewal and proliferation of stem cells is maintained till the late stage of differentiation. In our proposed model, Dkk1 may play an important role in downregulating self-renewal and proliferation pathway of stem cells at the late stage of differentiation, and its failure may lead to carcinogenesis.
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Affiliation(s)
- Sung-Min Ahn
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon, Korea
| | - Kyunghee Byun
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon, Korea
| | - Deokhoon Kim
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon, Korea
| | - Kiyoung Lee
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon, Korea
| | - Jong Shin Yoo
- Mass Spectrometry Analysis Group, Korea Basic Science Institute, Daejeon, Korea
| | - Seung U. Kim
- Gachon Institute for Regenerative Medicine, Gachon University of Medicine and Science, Incheon, Korea
- Department of Medicine, University of British Columbia, Vancouver, Canada
- * E-mail: (SUK); (RJS); (BL)
| | - Eek-hoon Jho
- Department of Life Science, The University of Seoul, Dongdaemun-gu, Seoul, Korea
| | - Richard J. Simpson
- Joint Proteomics Laboratory, Ludwig Institute for Cancer Research & the Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia
- * E-mail: (SUK); (RJS); (BL)
| | - Bonghee Lee
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon, Korea
- * E-mail: (SUK); (RJS); (BL)
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94
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Kim YS, Son OL, Lee JY, Kim SH, Oh S, Lee YS, Kim CH, Yoo JS, Lee JH, Miyoshi E, Taniguchi N, Hanash SM, Yoo HS, Ko JH. Lectin precipitation using phytohemagglutinin-L4coupled to avidin-agarose for serological biomarker discovery in colorectal cancer. Proteomics 2008; 8:3229-35. [DOI: 10.1002/pmic.200800034] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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95
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Ahn SM, Byun K, Cho K, Kim JY, Yoo JS, Kim D, Paek SH, Kim SU, Simpson RJ, Lee B. Human microglial cells synthesize albumin in brain. PLoS One 2008; 3:e2829. [PMID: 18665237 PMCID: PMC2483733 DOI: 10.1371/journal.pone.0002829] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2008] [Accepted: 07/03/2008] [Indexed: 12/23/2022] Open
Abstract
Albumin, an abundant plasma protein with multifunctional properties, is mainly synthesized in the liver. Albumin has been implicated in Alzheimer's disease (AD) since it can bind to and transport amyloid beta (Aβ), the causative agent of AD; albumin is also a potent inhibitor of Aβ polymerization. Despite evidence of non-hepatic transcription of albumin in many tissues including kidney and pancreas, non-hepatic synthesis of albumin at the protein level has been rarely confirmed. In a pilot phase study of Human Brain Proteome Project, we found evidence that microglial cells in brain may synthesize albumin. Here we report, for the first time, the de novo synthesis of albumin in human microglial cells in brain. Furtherore, we demonstrate that the synthesis and secretion of albumin from microglial cells is enhanced upon microgial activation by Aβ1–42- or lipopolysaccharide (LPS)-treatment. These data indicate that microglial cells may play a beneficial role in AD by secreting albumin that not only inhibits Aβ polymerization but also increases its clearance.
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Affiliation(s)
- Sung-Min Ahn
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon, Korea
| | - Kyunghee Byun
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon, Korea
| | - Kun Cho
- Mass Spectrometry Analysis Group, Korea Basic Science Institute, Daejeon, Korea
| | - Jin Young Kim
- Mass Spectrometry Analysis Group, Korea Basic Science Institute, Daejeon, Korea
| | - Jong Shin Yoo
- Mass Spectrometry Analysis Group, Korea Basic Science Institute, Daejeon, Korea
| | - Deokhoon Kim
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon, Korea
- Mass Spectrometry Analysis Group, Korea Basic Science Institute, Daejeon, Korea
| | - Sun Ha Paek
- Department of Neurosurgery, Clinical Research Institute, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Seung U. Kim
- Gachon Institute for Regenerative Medicine, Gachon University of Medicine and Science, Incheon, Korea
- Department of Medicine, University of British Columbia, Vancouver, Canada
| | - Richard J. Simpson
- Joint ProteomicS Laboratory, Ludwig Institute for Cancer Research & the Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia
- * E-mail: (RJS); (BL)
| | - Bonghee Lee
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon, Korea
- * E-mail: (RJS); (BL)
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96
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Kwon KH, Park GW, Kim JY, Lee SK, Lee JH, Kim YH, Kim SY, Park YM, Yoo JS. Island clustering analysis for the comparison of the membrane and the soluble protein fractions of human brain proteome. Proteomics 2008; 8:1149-61. [PMID: 18283667 DOI: 10.1002/pmic.200700756] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A protein identified in multiple separate bands of a 1-D gel reflects variation in the molecular weight caused by alternative splicing, endoproteolytic cleavage, or PTMs, such as glycosylation or ubiquitination. To characterize such a protein distribution over the bands, we defined an entity called an 'island' as the band region including the bands of the same protein identified sequentially. We quantified the island distribution using a new variable called an Iscore. Previously, as described in Park et al.. (Proteomics 2006, 6, 4978-4986.), we analyzed human brain tissue using a multidimensional MS/MS separation method. Here, the new method of island analysis was applied to the previous proteome data. The soluble and membrane protein fractions of human brain tissue were reanalyzed using the island distribution. The proteome of the soluble fraction exhibited more variation in island positions than that of the membrane fraction. Through the island analysis, we identified protein modifications and protein complexes over the 1-D gel bands.
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97
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Kim S, Choi MC, Hur M, Kim HS, Yoo JS, Hendrickson CL, Marshall AG. The 'hybrid cell': a new compensated infinity cell for larger radius ion excitation in Fourier transform ion cyclotron resonance mass spectrometry. Rapid Commun Mass Spectrom 2008; 22:1423-1429. [PMID: 18395882 DOI: 10.1002/rcm.3516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A new 'hybrid' ion cyclotron resonance (ICR) trap is proposed and analyzed by computer simulations. The trap is basically a hybrid of a segmented end cap (Infinity) and capacitively coupled cylindrical cell, with additional electrodes placed at the center of each end cap. The new trap produces an on-axis electric field z-profile similar to that of the Infinity cell or capacitively coupled open cylindrical cell during ion excitation. Simion simulations demonstrate that, during detection, appropriate changes of the potentials applied to the two new sets of electrodes produce a radial electric field z-profile that more closely approaches that for an ideal axial three-dimensional quadrupolar potential at high post-excitation ICR orbital radius, for improved signal-to-noise ratio and resolving power, and minimal m/z-discrimination.
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Affiliation(s)
- Sunghwan Kim
- Korea Basic Science Institute, 804-1 Yangcheong-Ri, Ochang-Myun, Cheongwon-Gun, Chungcheongbuk-Do, 363-883, Republic of Korea
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98
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Kim YS, Hwang SY, Kang HY, Sohn H, Oh S, Kim JY, Yoo JS, Kim YH, Kim CH, Jeon JH, Lee JM, Kang HA, Miyoshi E, Taniguchi N, Yoo HS, Ko JH. Functional Proteomics Study Reveals That N-Acetylglucosaminyltransferase V Reinforces the Invasive/Metastatic Potential of Colon Cancer through Aberrant Glycosylation on Tissue Inhibitor of Metalloproteinase-. Mol Cell Proteomics 2008; 7:1-14. [PMID: 17878270 DOI: 10.1074/mcp.m700084-mcp200] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [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: 01/02/2023] Open
Abstract
N-Acetylglucosaminyltransferase-V (GnT-V) has been reported to be up-regulated in invasive/metastatic cancer cells, but a comprehensive understanding of how the transferase correlates with the invasive/metastatic potential is not currently available. Through a glycomics approach, we identified 30 proteins, including tissue inhibitor of metalloproteinase-1 (TIMP-1), as a target protein for GnT-V in human colon cancer cell WiDr. TIMP-1 was aberrantly glycosylated as characterized by the addition of beta1,6-N-acetylglucosamine, polylactosaminylation, and sialylation in GnT-V-overexpressing WiDr cells. Compared with normal TIMP-1, the aberrantly glycosylated TIMP-1 showed the weaker inhibition on both matrix metalloproteinase (MMP)-2 and MMP-9, and this aberrancy was closely associated with cancer cell invasion and metastasis in vivo as well as in vitro. Integrated data, both of TIMP-1 expression level and aberrant glycosylation, could provide important information to aid to improve the clinical outcome of colon cancer patients.
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Affiliation(s)
- Yong-Sam Kim
- Daejeon-KRIBB-Fred Hutchinson Cancer Research Center Research Cooperation Center, Daejeon, Korea
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99
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Ahn YH, Ji ES, Kwon KH, Lee JY, Cho K, Kim JY, Kang HJ, Kim HG, Yoo JS. Protein phosphorylation analysis by site-specific arginine-mimic labeling in gel electrophoresis and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Anal Biochem 2007; 370:77-86. [PMID: 17659250 DOI: 10.1016/j.ab.2007.06.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2007] [Revised: 06/14/2007] [Accepted: 06/15/2007] [Indexed: 10/23/2022]
Abstract
Although recent advances in gel electrophoresis and mass spectrometry have greatly facilitated separation, purification, and identification of proteins, significant challenges remain in relation to phosphoprotein analysis. Here we introduce a powerful method for analysis of protein phosphorylation in which phosphorylation sites are labeled with guanidinoethanethiol (GET) by beta-elimination/Michael addition prior to proteolysis and mass spectrometry (MS) analysis. This technique is especially useful in conjunction with gel-based technology in that all of the processes involved, including GET labeling, washing, and phosphospecific enzymatic hydrolysis, can be carried out in excised gel slices, thereby minimizing sample loss and contamination. The novel GET tag, which has a highly basic guanidine group, increases the peak intensities for the GET-labeled tryptic peptides by matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) MS. In addition, phosphospecific proteolytic cleavage occurs at guanidinoethylcysteine (Gec) residue, which is arginine-mimic formed by GET tagging of phosphorylated serine residues. Thus, GET tagging is especially useful in analysis of long tryptic phosphopeptides. To illustrate the utility of the in-gel GET tagging and digestion approach, we used it to precisely analyze the phosphorylation sites of human glutathione S-transferase P1 (GSTP1), an enzyme involved in phase II metabolism of many carcinogens and anticancer drugs. The in-gel GET tagging/digestion technique significantly enhances the analytical potential of gel electrophoresis/MS in studies of proteome phosphorylation.
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Affiliation(s)
- Yeong Hee Ahn
- Division of Instrument Development, Korea Basic Science Institute, Daejeon 305-333, Republic of Korea
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100
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