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Liu Y, Zhang H, Zhao Z, Wang X, Kai Y, Huang D, Liu SQ, Lu Y. Germination Increases the Glucomoringin Content in Moringa Sprouts via Transforming Tyrosine. J Agric Food Chem 2024; 72:11278-11291. [PMID: 38708781 DOI: 10.1021/acs.jafc.4c01517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2024]
Abstract
Moringa seeds are an excellent dietary source of phytochemicals (i.e., glucosinolates, GSLs; isothiocyanates, ITCs) with health-beneficial effects. Although numerous studies have been conducted on moringa seeds, the effect of germination on the regulation of GSLs remains scarcely explored. The present study investigated the dynamic changes of GSLs in moringa seeds during germination (at 25, 30, and 35 °C for 6 days in the dark) through an untargeted metabolomics approach and compared the antioxidant capacity of ungerminated and germinated moringa seeds. Our results showed that germination significantly increased the total GSL content from 150 (day 0) to 323 μmol/g (35 °C, day 6) on a dry weight (DW) basis, especially glucomoringin (GMG), the unique glucosinolate in moringa seeds, which was significantly upregulated from 61 (day 0) to 149 μmol/g DW (35 °C, day 4). The upregulation of GMG corresponded to the metabolism of tyrosine, which might be the initial precursor for the formation of GMG. In addition, germination enhanced the total ITC content from 85 (day 0) to 239 μmol SE/g DW (35 °C, day 6), indicating that germination may have also increased the activity of myrosinase. Furthermore, germination remarkably increased the total phenolic content (109-507 mg GAE/100 g DW) and antioxidant capacity of moringa seeds. Our findings suggest that moringa sprouts could be promoted as a novel food and/or ingredient rich in GMG.
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Affiliation(s)
- Yi Liu
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore
| | - Haijuan Zhang
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore
| | - Zhuoyang Zhao
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore
| | - Xingwei Wang
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Yi Kai
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore
| | - Dejian Huang
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore
- National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China
| | - Shao-Quan Liu
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore
- National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China
| | - Yuyun Lu
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore
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Valera MJ, Olivera V, Pérez G, Boido E, Dellacassa E, Carrau F. Impact of phenylalanine on Hanseniaspora vineae aroma metabolism during wine fermentation. Int J Food Microbiol 2024; 415:110631. [PMID: 38402671 DOI: 10.1016/j.ijfoodmicro.2024.110631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 02/27/2024]
Abstract
Hanseniaspora vineae exhibits extraordinary positive oenological characteristics contributing to the aroma and texture of wines, especially by its ability to produce great concentrations of benzenoid and phenylpropanoid compounds compared with conventional Saccharomyces yeasts. Consequently, in practice, sequential inoculation of H. vineae and Saccharomyces cerevisiae allows to improve the aromatic quality of wines. In this work, we evaluated the impact on wine aroma produced by increasing the concentration of phenylalanine, the main amino acid precursor of phenylpropanoids and benzenoids. Fermentations were carried out using a Chardonnay grape juice containing 150 mg N/L yeast assimilable nitrogen. Fermentations were performed adding 60 mg/L of phenylalanine without any supplementary addition to the juice. Musts were inoculated sequentially using three different H. vineae strains isolated from Uruguayan vineyards and, after 96 h, S. cerevisiae was inoculated to complete the process. At the end of the fermentation, wine aromas were analysed by both gas chromatography-mass spectrometry and sensory evaluation through a panel of experts. Aromas derived from aromatic amino acids were differentially produced depending on the treatments. Sensory analysis revealed more floral character and greater aromatic complexity when compared with control fermentations without phenylalanine added. Moreover, fermentations performed in synthetic must with pure H. vineae revealed that even tyrosine can be used in absence of phenylalanine, and phenylalanine is not used by this yeast for the synthesis of tyrosine derivatives.
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Affiliation(s)
- María José Valera
- Área de Enología y Biotecnología de Fermentaciones, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
| | - Valentina Olivera
- Área de Enología y Biotecnología de Fermentaciones, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Gabriel Pérez
- Área de Enología y Biotecnología de Fermentaciones, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Eduardo Boido
- Área de Enología y Biotecnología de Fermentaciones, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Eduardo Dellacassa
- Laboratorio de Biotecnología de Aromas, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Francisco Carrau
- Área de Enología y Biotecnología de Fermentaciones, Facultad de Química, Universidad de la República, Montevideo, Uruguay; Centro de Investigaciones Biomédicas (CEINBIO), Facultad de Medicina, Universidad de la República, Uruguay
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Gao LM, Liu GY, Wang HL, Wassie T, Wu X, Yin YL. Impact of dietary supplementation with N-carbamoyl-aspartic acid on serum metabolites and intestinal microflora of sows. J Sci Food Agric 2023; 103:750-763. [PMID: 36054758 DOI: 10.1002/jsfa.12186] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 06/25/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND N-Carbamoyl-aspartic acid (NCA) is a critical precursor for de novo biosynthesis of pyrimidine nucleotides. To investigate the cumulative effects of maternal supplementation with NCA on the productive performance, serum metabolites and intestinal microbiota of sows, 40 pregnant sows (∼day 80) were assigned into two groups: (1) the control (CON) and (2) treatment (NCA, 50 g t-1 NCA). RESULTS Results showed that piglets from the NCA group had heavier birth weight than those in the CON group (P < 0.05). In addition, maternal supplementation with NCA decreased the backfat loss of sows during lactation (P < 0.05). Furthermore,16S-rRNA sequencing results revealed that maternal NCA supplementation decreased the abundance of Cellulosilyticum, Fournierella, Anaerovibrio, and Oribacterium genera of sows during late pregnancy (P < 0.05). Similarly, on the 14th day of lactation, maternal supplementation with NCA reduced the diversity of fecal microbes of sows as evidenced by significantly lower observed species, Chao1, and Ace indexes, and decreased the abundance of Lachnospire, Faecalibacterium, and Anaerovorax genera, while enriched the abundance of Catenisphaera (P < 0.05). Untargeted metabolomics showed that a total of 48 differentially abundant biomarkers were identified, which were mainly involved in metabolic pathways of arginine/proline metabolism, phenylalanine/tyrosine metabolism, and fatty acid biosynthesis, etc. CONCLUSION: Overall, the results indicated that NCA supplementation regulated intestinal microbial composition of sows and serum differential metabolites related to arginine, proline, phenylalanine, tyrosine, and fatty acids metabolism that may contribute to regulating the backfat loss of sows, and the birth weight and diarrhea rate of piglets. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Lu-Min Gao
- CAS Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Science, Beijing, China
| | - Gang-Yi Liu
- CAS Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, China
| | - Hong-Ling Wang
- CAS Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, China
| | - Teketay Wassie
- CAS Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, China
| | - Xin Wu
- CAS Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Science, Beijing, China
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
| | - Yu-Long Yin
- CAS Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Science, Beijing, China
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
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Liu S, Li C, Chu M, Zhang W, Wang W, Wang Y, Guo X, Deng F. Associations of forest negative air ions exposure with cardiac autonomic nervous function and the related metabolic linkages: A repeated-measure panel study. Sci Total Environ 2022; 850:158019. [PMID: 35973547 DOI: 10.1016/j.scitotenv.2022.158019] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 07/29/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Forest environment has many health benefits, and negative air ions (NAI) is one of the major forest environmental factors. Many studies have explored the effect of forest environment on cardiac autonomic nervous function, while forest NAI in the among function and the underlying mechanism still remain unclear. To explore the associations and molecular linkages between short-term exposure to forest NAI and heart rate variability (HRV), a repeated-measure panel study was conducted among 31 healthy adults. Participants were randomly selected to stay in a forest park for 3 days and 2 nights. Individual exposures including NAI were monitored simultaneously and HRV indices were measured repeatedly at the follow-up period. Urine samples were collected for non-targeted metabolomics analysis. Mixed-effect models were adopted to evaluate associations among NAI, HRV indices and metabolites. The median of NAI concentration was 68.11 (138.20) cm-3 during the study period. Short-term exposure to forest NAI was associated with the ameliorative HRV indices, especially the excitatory parasympathetic nerve. For instance, per interquartile range increase of 5-min moving average of NAI was associated with 9.99 % (95%CI: 8.95 %, 11.03 %) increase of power in high frequency. Eight metabolites were associated with NAI exposure. The down-regulated tyrosine metabolism was firstly observed, followed by other amino acid metabolic alterations. The NAI-related metabolic changes reflect the reduction of inflammation and oxidative stress. HRV indices were associated with 25 metabolites, mainly including arginine, proline and histidine metabolism. Short-term exposure to forest NAI is beneficial to HRV, especially to the parasympathetic nerve activity, by successively disturbing different metabolic pathways which mainly reflect the increased anti-inflammation and the reduced inflammation. The results will provide epidemiological evidences for developing forest therapy and improving cardiac autonomic nervous function.
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Affiliation(s)
- Shan Liu
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Chen Li
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Mengtian Chu
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Wenlou Zhang
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Wanzhou Wang
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Yazheng Wang
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Xinbiao Guo
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Furong Deng
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China.
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Dinu A, Apetrei C. A Review of Sensors and Biosensors Modified with Conducting Polymers and Molecularly Imprinted Polymers Used in Electrochemical Detection of Amino Acids: Phenylalanine, Tyrosine, and Tryptophan. Int J Mol Sci 2022; 23:1218. [PMID: 35163145 PMCID: PMC8835779 DOI: 10.3390/ijms23031218] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/18/2022] [Accepted: 01/20/2022] [Indexed: 02/07/2023] Open
Abstract
Recently, the studies on developing sensors and biosensors-with an obvious interdisciplinary character-have drawn the attention of many researchers specializing in various fundamental, but also complex domains such as chemistry, biochemistry, physics, biophysics, biology, bio-pharma-medicine, and bioengineering. Along these lines, the present paper is structured into three parts, and is aimed at synthesizing the most relevant studies on the construction and functioning of versatile devices, of electrochemical sensors and biosensors, respectively. The first part presents examples of the most representative scientific research focusing on the role and the importance of the phenylalanine, tyrosine, and tryptophan amino acids, selected depending on their chemical structure and their impact on the central nervous system. The second part is dedicated to presenting and exemplifying conductor polymers and molecularly imprinted polymers used as sensitive materials in achieving electrochemical sensors and biosensors. The last part of the review analyzes the sensors and biosensors developed so far to detect amino acids with the aid of conductor polymers and molecularly imprinted polymers from the point of view of the performances obtained, with emphasis on the detection methods, on the electrochemical reactions that take place upon detection, and on the electroanalytical performances. The present study was carried out with a view to highlighting, for the benefit of specialists in medicine and pharmacy, the possibility of achieving and purchasing efficient devices that might be used in the quality control of medicines, as well as in studying and monitoring diseases associated with these amino acids.
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Affiliation(s)
| | - Constantin Apetrei
- Department of Chemistry, Physics and Environment, Faculty of Sciences and Environment, “Dunărea de Jos” University of Galati, RO-800008 Galati, Romania;
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Fan YF, Zhu SX, Hou FB, Zhao DF, Pan QS, Xiang YW, Qian XK, Ge GB, Wang P. Spectrophotometric Assays for Sensing Tyrosinase Activity and Their Applications. Biosensors (Basel) 2021; 11:290. [PMID: 34436092 PMCID: PMC8393227 DOI: 10.3390/bios11080290] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/17/2021] [Accepted: 08/19/2021] [Indexed: 12/13/2022]
Abstract
Tyrosinase (TYR, E.C. 1.14.18.1), a critical enzyme participating in melanogenesis, catalyzes the first two steps in melanin biosynthesis including the ortho-hydroxylation of L-tyrosine and the oxidation of L-DOPA. Previous pharmacological investigations have revealed that an abnormal level of TYR is tightly associated with various dermatoses, including albinism, age spots, and malignant melanoma. TYR inhibitors can partially block the formation of pigment, which are always used for improving skin tone and treating dermatoses. The practical and reliable assays for monitoring TYR activity levels are very useful for both disease diagnosis and drug discovery. This review comprehensively summarizes structural and enzymatic characteristics, catalytic mechanism and substrate preference of TYR, as well as the recent advances in biochemical assays for sensing TYR activity and their biomedical applications. The design strategies of various TYR substrates, alongside with several lists of all reported biochemical assays for sensing TYR including analytical conditions and kinetic parameters, are presented for the first time. Additionally, the biomedical applications and future perspectives of these optical assays are also highlighted. The information and knowledge presented in this review offer a group of practical and reliable assays and imaging tools for sensing TYR activities in complex biological systems, which strongly facilitates high-throughput screening TYR inhibitors and further investigations on the relevance of TYR to human diseases.
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Affiliation(s)
- Yu-Fan Fan
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; (Y.-F.F.); (F.-B.H.); (D.-F.Z.); (Q.-S.P.); (X.-K.Q.); (G.-B.G.)
| | - Si-Xing Zhu
- Institute of Science, Technology and Humanities, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China;
| | - Fan-Bin Hou
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; (Y.-F.F.); (F.-B.H.); (D.-F.Z.); (Q.-S.P.); (X.-K.Q.); (G.-B.G.)
| | - Dong-Fang Zhao
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; (Y.-F.F.); (F.-B.H.); (D.-F.Z.); (Q.-S.P.); (X.-K.Q.); (G.-B.G.)
| | - Qiu-Sha Pan
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; (Y.-F.F.); (F.-B.H.); (D.-F.Z.); (Q.-S.P.); (X.-K.Q.); (G.-B.G.)
| | - Yan-Wei Xiang
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China;
| | - Xing-Kai Qian
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; (Y.-F.F.); (F.-B.H.); (D.-F.Z.); (Q.-S.P.); (X.-K.Q.); (G.-B.G.)
| | - Guang-Bo Ge
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; (Y.-F.F.); (F.-B.H.); (D.-F.Z.); (Q.-S.P.); (X.-K.Q.); (G.-B.G.)
| | - Ping Wang
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; (Y.-F.F.); (F.-B.H.); (D.-F.Z.); (Q.-S.P.); (X.-K.Q.); (G.-B.G.)
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7
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Dinu A, Apetrei C. Development of Polypyrrole Modified Screen-Printed Carbon Electrode Based Sensors for Determination of L-Tyrosine in Pharmaceutical Products. Int J Mol Sci 2021; 22:7528. [PMID: 34299146 PMCID: PMC8307433 DOI: 10.3390/ijms22147528] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/07/2021] [Accepted: 07/13/2021] [Indexed: 12/21/2022] Open
Abstract
Good health, of vital importance in order to carry out our daily routine, consists of both physical and mental health. Tyrosine (Tyr) deficiency as well as its excess are issues that can affect mental health and can generate disorders such as depression, anxiety, or stress. Tyr is the amino acid (AA) responsible for maintaining good mental health, and for this reason, the present research presents the development of new electrochemical sensors modified with polypyrrole (PPy) doped with different doping agents such as potassium hexacyanoferrate (II) (FeCN), sodium nitroprusside (NP), and sodium dodecyl sulfate (SDS) for a selective and sensitive detection of Tyr. The development of the sensors was carried out by chronoamperometry (CA) and the electrochemical characterization was carried out by cyclic voltammetry (CV). The detection limits (LOD) obtained with each modified sensor were 8.2 × 10-8 M in the case of PPy /FeCN-SPCE, 4.3 × 10-7 M in the case of PPy/NP-SPCE, and of 3.51 × 10-7 M in the case of PPy/SDS-SPCE, thus demonstrating a good sensitivity of these sensors detecting L-Tyr. The validation of sensors was carried out through quantification of L-Tyr from three pharmaceutical products by the standard addition method with recoveries in the range 99.92-103.97%. Thus, the sensors present adequate selectivity and can be used in the pharmaceutical and medical fields.
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Affiliation(s)
| | - Constantin Apetrei
- Faculty of Science and Environment, “Dunărea de Jos” University of Galati, 800008 Galati, Romania;
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Shellaiah M, Chen YT, Thirumalaivasan N, Aazaad B, Awasthi K, Sun KW, Wu SP, Lin MC, Ohta N. Pyrene-Based AIEE Active Nanoprobe for Zn 2+ and Tyrosine Detection Demonstrated by DFT, Bioimaging, and Organic Thin-Film Transistor. ACS Appl Mater Interfaces 2021; 13:28610-28626. [PMID: 34110776 DOI: 10.1021/acsami.1c04744] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The development of aggregation-induced emission enhancement (AIEE) active nanoprobes without any synthetic complication for solution-state and organic thin-film transistor (OTFT)-based sensory applications is still a challenging task. In this study, the novel pyrene-incorporated Schiff base (5-phenyl-4-((pyren-1-ylmethylene)amino)-4H-1,2,4-triazole-3-thiol; PT2) with an AIEE property was synthesized via a one-pot reaction and was reported for detecting Zn2+ and tyrosine in the solution state and OTFT. In the AIEE studies of PT2 (in CH3CN) at various water fractions (fw: 0-97.5%), the existence of J-aggregation, crystalline changes, and nanofibers formation was confirmed by ultraviolet absorption/photoluminescence (UV/PL) spectroscopy, powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), and dynamic-light scattering (DLS) techniques. Similarly, PT2-based Zn2+ detection and sensory reversibility with tyrosine were demonstrated by UV/PL studies with evidence related to crystalline/nanolevel changes in PXRD, SEM, TEM, AFM, and DLS data. Distinct decay profiles associated with the AIEE and sensory responses of PT2 were observed in time-resolved photoluminescence spectra. From the standard deviation and linear fittings of PL titrations, detection limits (LODs) of the Zn2+ with PT2 and the tyrosine with PT2-Zn2+ were estimated as 0.79 and 45 nM, respectively. High-resolution mass and 1H NMR results confirmed 2:1 and 1:1 stoichiometry and binding sites of PT2-Zn2+-PT2* and tyrosine-Zn2+ complexes. Moreover, the values of association constants determined by linear fittings were 4.205 × 10-7 and 1.73 × 10-8 M-2, correspondingly. Optimization via the density functional theory disclosed the binding sites and suppression of twisted intramolecular charge transfer/photoinduced electron transfer (TICT/PET) as well as the involvement of restricted intramolecular rotation in the AIEE and PET "ON-OFF-ON" mechanisms in the Zn2+ and tyrosine sensors. Results from the B16-F10 cellular and zebrafish imaging of AIEE, Zn2+, and tyrosine sensors further attested the applicability of PT2 in biological samples. Finally, the PT2 and pentacene-incorporated OTFT devices were fabricated. The devices displayed more than 90% change in drain-source current when reacted with Zn2+ with an LOD of 5.46 μM but showed no response to tyrosine, thereby confirming the reversibility. Moreover, the OTFT devices also demonstrated Zn2+ ion detection in tap water and lake water samples.
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Affiliation(s)
- Muthaiah Shellaiah
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (formerly National Chiao Tung University), Hsinchu 300, Taiwan
| | - Yu-Ting Chen
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (formerly National Chiao Tung University), Hsinchu 300, Taiwan
| | - Natesan Thirumalaivasan
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (formerly National Chiao Tung University), Hsinchu 300, Taiwan
| | - Basheer Aazaad
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (formerly National Chiao Tung University), Hsinchu 300, Taiwan
| | - Kamlesh Awasthi
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (formerly National Chiao Tung University), Hsinchu 300, Taiwan
- Center for Emergent Functional Matter Science, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Kien Wen Sun
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (formerly National Chiao Tung University), Hsinchu 300, Taiwan
| | - Shu-Pao Wu
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (formerly National Chiao Tung University), Hsinchu 300, Taiwan
| | - Ming-Chang Lin
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (formerly National Chiao Tung University), Hsinchu 300, Taiwan
| | - Nobuhiro Ohta
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (formerly National Chiao Tung University), Hsinchu 300, Taiwan
- Center for Emergent Functional Matter Science, National Chiao Tung University, Hsinchu 300, Taiwan
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9
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Kriss CL, Duro N, Nadeau OW, Guergues J, Chavez-Chiang O, Culver-Cochran AE, Chaput D, Varma S, Stevens SM. Site-specific identification and validation of hepatic histone nitration in vivo: Implications for alcohol-induced liver injury. J Mass Spectrom 2021; 56:e4713. [PMID: 33942435 DOI: 10.1002/jms.4713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 01/29/2021] [Accepted: 02/23/2021] [Indexed: 06/12/2023]
Abstract
Oxidative and nitrative stress have been implicated in the molecular mechanisms underlying a variety of biological processes and disease states including cancer, aging, cardiovascular disease, neurological disorders, diabetes, and alcohol-induced liver injury. One marker of nitrative stress is the formation of 3-nitrotyrosine, or protein tyrosine nitration (PTN), which has been observed during inflammation and tissue injury; however, the role of PTN in the progression or possibly the pathogenesis of disease is still unclear. We show in a model of alcohol-induced liver injury that an increase in PTN occurs in hepatocyte nuclei within the liver of wild-type male C57BL/6J mice following chronic ethanol exposure (28 days). High-resolution mass spectrometric analysis of isolated hepatic nuclei revealed several novel sites of tyrosine nitration on histone proteins. Histone nitration sites were validated by tandem mass spectrometry (MS/MS) analysis of representative synthetic nitropeptides equivalent in sequence to the respective nitrotyrosine sites identified in vivo. We further investigated the potential structural impact of the novel histone H3 Tyr41 (H3Y41) nitration site identified using molecular dynamics (MD) simulations. MD simulations of the nitrated and non-nitrated forms of histone H3Y41 showed significant structural changes at the DNA interface upon H3Y41 nitration. The results from this study suggest that, in addition to other known post-translational modifications that occur on histone proteins (e.g., acetylation and methylation), PTN could induce chromatin structural changes, possibly affecting gene transcription processes associated with the development of alcohol-induced liver injury.
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Affiliation(s)
- Crystina L Kriss
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, FL, 33620, USA
- Department of Cardiovascular Regeneration, Houston Methodist Research Institute, 6607 Bertner Ave, Houston, TX, 77030, USA
| | - Nalvi Duro
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, FL, 33620, USA
| | - Owen W Nadeau
- Department of Pharmaceutical Sciences, Albany College of Pharmacy and Health Sciences, 261 Mountain View Dr, Colchester, VT, 05446, USA
| | - Jennifer Guergues
- Department of Pharmaceutical Sciences, Albany College of Pharmacy and Health Sciences, 261 Mountain View Dr, Colchester, VT, 05446, USA
- MSRC Proteomics Core Laboratory, Vanderbilt University, Medical Research Building III, Nashville, TN, 37232, USA
| | - Omar Chavez-Chiang
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, FL, 33620, USA
- Department of Tumor Biology, H. Lee Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, SRB-3, Tampa, FL, 33612, USA
| | - Ashley E Culver-Cochran
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, FL, 33620, USA
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Dale Chaput
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, FL, 33620, USA
| | - Sameer Varma
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, FL, 33620, USA
| | - Stanley M Stevens
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, FL, 33620, USA
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10
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Kohutiar M, Eckhardt A. A Method for Analysis of Nitrotyrosine-Containing Proteins by Immunoblotting Coupled with Mass Spectrometry. Methods Mol Biol 2021; 2276:383-396. [PMID: 34060056 DOI: 10.1007/978-1-0716-1266-8_28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Nitrotyrosine formation is caused by presence of reactive oxygen and nitrogen species. Nitration is a very selective process leading to specific modification of only a few tyrosines in protein molecule. 2D electrophoresis and western blotting techniques coupled with mass spectrometry are common methods used in analysis of proteome. Here we describe protocol for analysis of peroxynitrite-induced protein nitration in isolated mitochondria. Mitochondrial proteins are separated by 2D electrophoresis and transferred to nitrocellulose membrane. Membranes are then incubated with antibodies against nitrotyrosine. Positive spots are compared with corresponding Coomassie-stained gels, and protein nitration is confirmed with mass spectrometry techniques.
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Affiliation(s)
- Matej Kohutiar
- Department of Medical Chemistry and Clinical Biochemistry, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Prague, Czech Republic.
| | - Adam Eckhardt
- Department of Translational metabolism, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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11
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Min S, Niu C, Shan W, Sun W, Liu C, Zheng F, Wang J, Li Q. Composition, source, and influencing factors of white spots formation in soybean paste. J Food Sci 2020; 85:3113-3123. [PMID: 32954501 DOI: 10.1111/1750-3841.15457] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 07/29/2020] [Accepted: 08/25/2020] [Indexed: 11/30/2022]
Abstract
White spots are commonly found in bean-based fermented food, which will significantly lower the product quality. This study aimed to analyze the composition of white spots and further reveal the source and influencing factors of white spots in bean-based fermented food using soybean paste as study model. The results showed that white spots were mainly composed of 40.96% free tyrosine and 37.94% tyrosine in combination form. During soybean paste fermentation, tyrosine was found to be produced by the actions of proteolytic enzymes secreted by Aspergillus oryzae 3.042 instead of the microbial metabolism and the excessive accumulation of tyrosine in soybean paste led to the formation of white spots. Among all influencing factors, high temperature treatment favored the formation of white spots. The existence of soy peptone and phenylalanine would postpone the precipitation of tyrosine while promoting the aggregation of the tyrosine precipitation. Field emission scanning electron microscope analysis showed that tyrosine would accumulate around the soybean protein particles and treatment at 120 °C would disrupt the structure of tyrosine-protein complex. Based on the above results, we proposed that treatment of soybean paste at temperature lower than 80 °C was the current practically applicable method to control the formation of white spots in soybean paste. PRACTICAL APPLICATION: This study developed a new idea to understand the composition and formation of white spots in soybean paste, which would provide guidance for prevention and control of white spots during the production of soybean paste for manufacturers and researchers.
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Affiliation(s)
- Shihao Min
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Wanxiang Shan
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Weikang Sun
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
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12
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Fiocchi E, Civettini M, Carbonara P, Zupa W, Lembo G, Manfrin A. Development of molecular and histological methods to evaluate stress oxidative biomarkers in sea bass (Dicentrarchus labrax). Fish Physiol Biochem 2020; 46:1577-1588. [PMID: 32388830 DOI: 10.1007/s10695-020-00811-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 04/23/2020] [Indexed: 06/11/2023]
Abstract
In aquaculture, fish species may experience stressful episodes caused by poor farming conditions. The exponential increase of global aquaculture has raised the number of research studies aimed at demonstrating the sensitivity of aquatic animals in confined environments. The development of a real-time PCR and immunohistochemistry methods were investigated to evaluate the presence, localization, and quantity of biomarkers of oxidative stress in European sea bass (Dicentrarchus labrax). In particular, stress tests such as manipulation and temperature changes were conducted through molecular methods to identify the expression level of heat shock protein 70 (HSP70) in stressed animals compared with a control group. The immunohistochemical technique was also applied to locate and study the trends-levels of nitrotyrosine (NT), heat shock protein 70 (HSP70), malondialdehyde (MDA), and 4-hydroxy-2-nonenal (HNE) in different tissues from stressed animals and control group. The presence of the rodlet cell (RCs) was evaluated by histology in both a control and stressed group. Our results show that the real-time PCR method developed is specific for the evaluated target gene and that manipulation and temperature increase are strong stressors for animals. Relative quantification data revealed a gene expression increase of HSP70 in the stressed group of animals compared to the control group. The antibodies used for the immunohistochemical staining were efficient, and it was possible to appreciate the increase of immunoprecipitates in European sea bass either manipulated or stressed by temperature increase. The present study can be a starting point to allow the quantification of HSP70 and the identification of other stress biomarkers in D. labrax.
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Affiliation(s)
- Eleonora Fiocchi
- Istituto Zooprofilattico Sperimentale delle Venezie, National Reference Laboratory for Fish, Mollusc and Crustacean Diseases, Viale Università, 10, 35020, Legnaro, Italy.
| | - Michele Civettini
- Istituto Zooprofilattico Sperimentale delle Venezie, National Reference Laboratory for Fish, Mollusc and Crustacean Diseases, Viale Università, 10, 35020, Legnaro, Italy
| | - Pierluigi Carbonara
- COISPA Tecnologia & Ricerca, Via Lama di Giotta, 70126, Torre a Mare, BA, Italy
| | - Walter Zupa
- COISPA Tecnologia & Ricerca, Via Lama di Giotta, 70126, Torre a Mare, BA, Italy
| | - Giuseppe Lembo
- COISPA Tecnologia & Ricerca, Via Lama di Giotta, 70126, Torre a Mare, BA, Italy
| | - Amedeo Manfrin
- Istituto Zooprofilattico Sperimentale delle Venezie, National Reference Laboratory for Fish, Mollusc and Crustacean Diseases, Viale Università, 10, 35020, Legnaro, Italy
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13
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Vyas G, Bhatt S, Si MK, Jindani S, Suresh E, Ganguly B, Paul P. Colorimetric dual sensor for Cu(II) and tyrosine and its application as paper strips for detection in water and human saliva as real samples. Spectrochim Acta A Mol Biomol Spectrosc 2020; 230:118052. [PMID: 31955120 DOI: 10.1016/j.saa.2020.118052] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 01/07/2020] [Accepted: 01/09/2020] [Indexed: 06/10/2023]
Abstract
A calix[4]arene based compound incorporating amide and morpholine moieties has been synthesized and its ion recognition property towards metal ions and application of its metal complex towards sensing of amino acids has been investigated. The synthesized compound interacts with Cu2+ with high selectivity and sensitivity (LOD, 0.1 ppb) in aqueous media with instant color change from colorless to yellow without interference from any other metal ions used in this study. The molecular structure of the calix compound (1) has been determined by single crystal X-ray study and the structure of its Cu2+ complex has been established by DFT calculation. The Cu2+ complex of 1 selectively detects tyrosine (LOD, 1.2 ppm) in water with distinct color change and without any interference from other 22 amino acids used in this study. The mechanism for detection of tyrosine with color change is also presented. For easy field application, paper based sensor strips have been prepared by coating compound 1 and its Cu2+ complex on filter paper, which have been used for semi-quantitative measurement of Cu2+ and tyrosine. Compound 1 and its Cu2+ complex have also been used for detection of Cu2+ and tyrosine, respectively in water and human saliva as real samples and satisfactory results are obtained.
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Affiliation(s)
- Gaurav Vyas
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Shreya Bhatt
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Mrinal K Si
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sana Jindani
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Eringathodi Suresh
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Bishwajit Ganguly
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Parimal Paul
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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14
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Renuse S, Madugundu AK, Jung JH, Byeon SK, Goldschmidt HL, Tahir R, Meyers D, Kim DI, Cutler J, Kim KP, Wu X, Huganir RL, Pandey A. Signature Fragment Ions of Biotinylated Peptides. J Am Soc Mass Spectrom 2020; 31:394-404. [PMID: 31939678 PMCID: PMC7199424 DOI: 10.1021/jasms.9b00024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The use of biotin or biotin-containing reagents is an essential component of many protein purification and labeling technologies. Owing to its small size and high affinity to the avidin family of proteins, biotin is a versatile molecular handle that permits both enrichment and purity that is not easily achieved by other reagents. Traditionally, the use of biotinylation to enrich for proteins has not required the detection of the site of biotinylation. However, newer technologies for discovery of protein-protein interactions, such as APEX and BioID, as well as some of the click chemistry-based labeling approaches have underscored the importance of determining the exact residue that is modified by biotin. Anti-biotin antibody-based enrichment of biotinylated peptides (e.g., BioSITe) coupled to LC-MS/MS permit large-scale detection and localization of sites of biotinylation. As with any chemical modification of peptides, understanding the fragmentation patterns that result from biotin modification is essential to improving its detection by LC-MS/MS. Tandem mass spectra of biotinylated peptides has not yet been studied systematically. Here, we describe the various signature fragment ions generated with collision-induced dissociation of biotinylated peptides. We focused on biotin adducts attached to peptides generated by BioID and APEX experiments, including biotin, isotopically heavy biotin, and biotin-XX-phenol, a nonpermeable variant of biotin-phenol. We also highlight how the detection of biotinylated peptides in high-throughput studies poses certain computational challenges for accurate quantitation which need to be addressed. Our findings about signature fragment ions of biotinylated peptides should be helpful in the confirmation of biotinylation sites.
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Affiliation(s)
- Santosh Renuse
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota 55905, United States
- Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905, United States
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Anil K. Madugundu
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota 55905, United States
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
- Institute of Bioinformatics, International Tech Park, Bangalore 560066, Karnataka, India
- Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka India
| | - Jae Hun Jung
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota 55905, United States
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
- Department of Applied Chemistry, Institute of Natural Science, Global Center for Pharmaceutical Ingredient Materials, Kyung Hee University, Yongin, South Korea
| | - Seul Kee Byeon
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota 55905, United States
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Hana L. Goldschmidt
- Solomon H. Snyder Department of Neuroscience, Kavli Neuroscience Discovery Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Raiha Tahir
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
- Biochemistry, Cellular and Molecular Biology Graduate Program, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - David Meyers
- Synthetic Core Facility, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Dae In Kim
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Jevon Cutler
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
- Pre-Doctoral Training Program in Human Genetics, McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Kwang Pyo Kim
- Department of Applied Chemistry, Institute of Natural Science, Global Center for Pharmaceutical Ingredient Materials, Kyung Hee University, Yongin, South Korea
| | - Xinyan Wu
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota 55905, United States
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Richard L. Huganir
- Solomon H. Snyder Department of Neuroscience, Kavli Neuroscience Discovery Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Akhilesh Pandey
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota 55905, United States
- Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905, United States
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
- Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka India
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15
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Bilotto P, Labate C, De Santo MP, Deepankumar K, Miserez A, Zappone B. Adhesive Properties of Adsorbed Layers of Two Recombinant Mussel Foot Proteins with Different Levels of DOPA and Tyrosine. Langmuir 2019; 35:15481-15490. [PMID: 31465231 DOI: 10.1021/acs.langmuir.9b01730] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Using a surface forces apparatus and an atomic force microscope, we characterized the adhesive properties of adsorbed layers of two recombinant variants of Perna viridis foot protein 5 (PVFP-5), the main surface-binding protein in the adhesive plaque of the Asian green mussel. In one variant, all tyrosine residues were modified into 3,4-dihydroxy-l-phenylalanine (DOPA) during expression using a residue-specific incorporation strategy. DOPA is a key molecular moiety underlying underwater mussel adhesion. In the other variant, all tyrosine residues were preserved. The layer was adsorbed on a mica substrate and pressed against an uncoated surface. While DOPA produced a stronger adhesion than tyrosine in contact with the nanoscopic Si3N4 probe of the atomic force microscope, the two variants produced comparable adhesion on the curved macroscopic mica surfaces of the surface forces apparatus. These findings show that the presence of DOPA is not a sufficient condition to generate strong underwater adhesion. Surface chemistry and contact geometry affect the strength and abundance of protein-surface bonds created during adsorption and surface contact. Importantly, the adsorbed protein layer has a random and dynamic polymer-network structure that should be optimized to transmit the tensile stress generated during surface separation to DOPA surface bonds rather than other weaker bonds.
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Affiliation(s)
- Pierluigi Bilotto
- Dipartimento di Fisica , Università della Calabria , Rende , Italy
- Institute of Applied Physics , Vienna University of Technology , Vienna , Austria
| | - Cristina Labate
- Dipartimento di Fisica , Università della Calabria , Rende , Italy
| | - Maria P De Santo
- Dipartimento di Fisica , Università della Calabria , Rende , Italy
- Consiglio Nazionale delle Ricerche - Istituto di Nanotecnologia (CNR - Nanotec) , c/o Università della Calabria , Ponte P. Bucci, 33/B , 87036 Rende ( CS ), Italy
| | - Kanagavel Deepankumar
- Biological and Biomimetic Material Laboratory and Center for Biomimetic Sensor Science, School of Materials Science and Engineering , Nanyang Technological University (NTU) , 50 Nanyang Avenue , Singapore 637553
| | - Ali Miserez
- Biological and Biomimetic Material Laboratory and Center for Biomimetic Sensor Science, School of Materials Science and Engineering , Nanyang Technological University (NTU) , 50 Nanyang Avenue , Singapore 637553
- School of Biological Sciences , Nanyang Technological University (NTU) , 60 Nanyang Drive , Singapore 637551
| | - Bruno Zappone
- Consiglio Nazionale delle Ricerche - Istituto di Nanotecnologia (CNR - Nanotec) , c/o Università della Calabria , Ponte P. Bucci, 33/B , 87036 Rende ( CS ), Italy
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16
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Abeyawardhane DL, Curry AM, Forney AK, Roberts JW, Lucas HR. Biometals as conformational modulators of α-synuclein photochemical crosslinking. J Biol Inorg Chem 2019; 24:1261-1268. [PMID: 31728738 PMCID: PMC7334974 DOI: 10.1007/s00775-019-01738-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Accepted: 10/26/2019] [Indexed: 11/28/2022]
Abstract
Metal dyshomeostasis has long been linked to Parkinson's disease (PD), and the amyloidogenic protein α-synuclein (αS) is universally recognized as a key player in PD pathology. Structural consequences upon coordination of copper and iron to αS have gained attention due to significant dyshomeostasis of both metals in the PD brain. Protein-metal association can navigate protein folding in distinctive pathways based on the identity of the bio-metal in question. In this work, we employed photo-chemical crosslinking of unmodified proteins (PICUP) to evaluate these potential metal ion-induced structural alterations in the folding dynamics of N-terminally acetylated αS (NAcαS) following metal coordination. Through fluorescence analysis and immunoblotting analyses following photoirradiation, we discovered that coordination of iron obstructs copper-promoted crosslinking. The absence of intra-molecular crosslinking upon iron association further supports its C-terminal coordination site and suggests a potential role for iron in mitigating nearby post-translational modification of tyrosine residues. Decreased fluorescence emission upon synergistic coordination of both copper and iron highlighted that although copper acts as a conformational promotor of NAcαS crosslinking, iron inhibits analogous conformational changes within the protein. The metal coordination preferences of NAcαS suggest that both competitive binding sites as well as dual metal coordination contribute to the changes in folding dynamics, unveiling unique structural orientations for NAcαS that have a direct and measureable influence on photoinitiated dityrosine crosslinks. Moreover, our findings have physiological implications in that iron overload, as is associated with PD-insulted brain tissue, may serve as a conformational block of copper-promoted protein oxidation.
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Affiliation(s)
| | - Alyson M Curry
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284, USA
| | - Ashley K Forney
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284, USA
| | - Joel W Roberts
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284, USA
| | - Heather R Lucas
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284, USA.
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17
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Zhao P, Zare RN, Chen H. Absolute Quantitation of Oxidizable Peptides by Coulometric Mass Spectrometry. J Am Soc Mass Spectrom 2019; 30:2398-2407. [PMID: 31429055 DOI: 10.1007/s13361-019-02299-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 07/15/2019] [Accepted: 07/21/2019] [Indexed: 06/10/2023]
Abstract
Quantitation methods for peptides using mass spectrometry have advanced rapidly. These methods rely on using standard and/or isotope-labeled peptides, which might be difficult or expensive to synthesize. To tackle this challenge, we present a new approach for absolute quantitation without the use of standards or calibration curves based on coulometry combined with mass spectrometry (MS). In this approach, which we call coulometric mass spectrometry (CMS), the mass spectrum of a target peptide containing one or more tyrosine residues is recorded before and after undergoing electrochemical oxidation. We record the total integrated oxidation current from the electrochemical measurement, which according to the Faraday's Law of coulometry, provides the number of moles of oxidized peptide. The ion intensity ratio of the target peptide before and after oxidation provides an excellent estimate of the fraction of the peptide that has been oxidized, from which the total amount of peptide is calculated. The striking strength of CMS is that it needs no standard peptide, but CMS does require the peptide to contain a known number of oxidizable groups. To illustrate the power of this method, we analyzed various tyrosine-containing peptides such as GGYR, DRVY, oxytocin, [Arg8]-vasotocin and angiotensinogen 1-14 with a quantification error ranging from - 7.5 to + 2.4%. This approach is also applicable to quantifying phosphopeptides and could be useful in proteomics research.
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Affiliation(s)
- Pengyi Zhao
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Richard N Zare
- Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA.
| | - Hao Chen
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA.
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18
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Pálla T, Fogarasi E, Noszál B, Tóth G. Characterization of the Site-Specific Acid-Base Equilibria of 3-Nitrotyrosine. Chem Biodivers 2019; 16:e1900358. [PMID: 31364276 DOI: 10.1002/cbdv.201900358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 07/30/2019] [Indexed: 11/07/2022]
Abstract
The complete macro- and microequilibrium analyses of 3-nitrotyrosine, a biomarker of oxidative stress damage, are presented for the first time. The protonation macroconstants were determined by 1 H-NMR-pH titration, while microconstants were elucidated by a combination of deductive and NMR methods, in which properties of the methyl ester derivative as an auxiliary compound were also studied. Combination of the NMR-pH characterization of the title and auxiliary compounds and the pair-interactivity parameters of 3-iodotyrosine provided the sufficient system to evaluate all the microconstants. NMR-pH profiles, macroscopic and microscopic protonation schemes, and species-specific distribution diagrams are included. The phenolate basicity of 3-nitrotyrosine is 500 times below that of tyrosine, and it is even lower than that of 3-iodotyrosine. This phenomenon can be explained by the stronger electron withdrawing and the negative mesomeric effect of the nitro group. Based on our results, 89 % of the phenolic OH groups are deprotonated in 3-NT molecules at the pH of the blood plasma.
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Affiliation(s)
- Tamás Pálla
- Semmelweis University, Department of Pharmaceutical Chemistry, Hőgyes E. u. 9, 1092, Budapest, Hungary
| | - Erzsébet Fogarasi
- University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureş, Faculty of Pharmacy, Department of Toxicology and Biopharmacy, Str. Marinescu Gheorghe 38, 540142, Târgu Mures, Romania
| | - Béla Noszál
- Semmelweis University, Department of Pharmaceutical Chemistry, Hőgyes E. u. 9, 1092, Budapest, Hungary
| | - Gergő Tóth
- Semmelweis University, Department of Pharmaceutical Chemistry, Hőgyes E. u. 9, 1092, Budapest, Hungary
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Goyer A, Picard M, Hellmann HA, Mooney SL. Effect of low-temperature storage on the content of folate, vitamin B 6 , ascorbic acid, chlorogenic acid, tyrosine, and phenylalanine in potatoes. J Sci Food Agric 2019; 99:4842-4848. [PMID: 30980531 DOI: 10.1002/jsfa.9750] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 04/09/2019] [Accepted: 04/11/2019] [Indexed: 05/06/2023]
Abstract
BACKGROUND Changes in the metabolite composition of potato tubers during low-temperature storage can affect their nutritional value, susceptibility to bruising, and processing qualities. Here, we measured changes in the amounts of folate, vitamin B6 , and vitamin C, and the blackspot pigment precursors chlorogenic acid and tyrosine, as well as phenylalanine, in five potato varieties stored at 7.8 °C for 8 months in 2015 and 2016. RESULTS Folate content increased in all varieties in both years during low-temperature storage, with statistically significant changes occurring in six out of eight conditions. Increase rates ranged from 11% to 141%. Vitamin B6 content increased in all varieties during the storage period, but changes were statistically significant in only two out of eight conditions. Increase rates ranged from 5% to 24%. Ascorbic acid content decreased in all varieties in both years during the storage period. Decrease rates ranged from 16% to 78%, and were statistically significant in seven out of eight conditions. For chlorogenic acid, no consistent trend was observed. Changes varied between -14% and +14%, but none was statistically significant. Tyrosine content increased in all varieties in both years, except in Sage Russet in 2015. Increase rates ranged from 19% to 238% and were statistically significant in three out of seven conditions. Changes in phenylalanine content were very similar to those observed for tyrosine, with increases up to 272% in Teton Russet. CONCLUSIONS These results show that storage at low temperature substantially affects tuber nutritional quality and biochemical bruising potential. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Aymeric Goyer
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, USA
- Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston, OR, USA
| | - Maël Picard
- Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston, OR, USA
| | - Hanjo A Hellmann
- School of Biological Sciences, Washington State University, Pullman, WA, USA
| | - Sutton L Mooney
- School of Biological Sciences, Washington State University, Pullman, WA, USA
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Antonia Álvarez-Fernández M, Fernández-Cruz E, Valero E, Troncoso AM, Carmen García-Parrilla M. Efficiency of three intracellular extraction methods in the determination of metabolites related to tryptophan and tyrosine in winemaking yeast's metabolism by LC-HRMS. Food Chem 2019; 297:124924. [PMID: 31253284 DOI: 10.1016/j.foodchem.2019.05.198] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 05/28/2019] [Accepted: 05/29/2019] [Indexed: 01/09/2023]
Abstract
Yeast nitrogen metabolism produces metabolites, whose origin in wines has scarcely been studied, with an important biological and organoleptic role. The present work focuses on comparing three intracellular extraction methods in order to elucidate efficiency of extraction while measuring the effect of temperature upon the integrity of the compounds related to the metabolism of tryptophan and tyrosine by yeast. Two UHPLC/HRMS methods to measure 16 metabolites were developed and validated. The validation provided optimum values of LOD (7.4·10-6 to 0.1 μg L-1), of LOQ (2·10-5 to 0.02 μg L-1) of precision (11-0.5% RSD) and repeatability (12-0.5% RSD). The removal of interfering molecules enabled matrix effects to be kept at low levels. The results pointed out that the low-temperature methods were more effective, providing better precision for 16 metabolites. The high-temperature extraction method may yield false enhanced compounds concentrations since they originate in cell wall macromolecules degradation.
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Affiliation(s)
- M Antonia Álvarez-Fernández
- Departamento de Nutrición, Bromatología, Toxicología y Medicina Legal, Facultad de Farmacia, Universidad de Sevilla, C/P. García González n° 2, Sevilla 41012, Spain
| | - E Fernández-Cruz
- Departamento de Nutrición, Bromatología, Toxicología y Medicina Legal, Facultad de Farmacia, Universidad de Sevilla, C/P. García González n° 2, Sevilla 41012, Spain
| | - E Valero
- Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide, Ctra. Utrera, Km 1, Sevilla 41013, Spain
| | - Ana M Troncoso
- Departamento de Nutrición, Bromatología, Toxicología y Medicina Legal, Facultad de Farmacia, Universidad de Sevilla, C/P. García González n° 2, Sevilla 41012, Spain
| | - M Carmen García-Parrilla
- Departamento de Nutrición, Bromatología, Toxicología y Medicina Legal, Facultad de Farmacia, Universidad de Sevilla, C/P. García González n° 2, Sevilla 41012, Spain.
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Klinger C, Żółtowska-Aksamitowska S, Wysokowski M, Tsurkan MV, Galli R, Petrenko I, Machałowski T, Ereskovsky A, Martinović R, Muzychka L, Smolii OB, Bechmann N, Ivanenko V, Schupp PJ, Jesionowski T, Giovine M, Joseph Y, Bornstein SR, Voronkina A, Ehrlich H. Express Method for Isolation of Ready-to-Use 3D Chitin Scaffolds from Aplysina archeri (Aplysineidae: Verongiida) Demosponge. Mar Drugs 2019; 17:md17020131. [PMID: 30813373 PMCID: PMC6409528 DOI: 10.3390/md17020131] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 02/16/2019] [Accepted: 02/19/2019] [Indexed: 02/07/2023] Open
Abstract
Sponges are a valuable source of natural compounds and biomaterials for many biotechnological applications. Marine sponges belonging to the order Verongiida are known to contain both chitin and biologically active bromotyrosines. Aplysina archeri (Aplysineidae: Verongiida) is well known to contain bromotyrosines with relevant bioactivity against human and animal diseases. The aim of this study was to develop an express method for the production of naturally prefabricated 3D chitin and bromotyrosine-containing extracts simultaneously. This new method is based on microwave irradiation (MWI) together with stepwise treatment using 1% sodium hydroxide, 20% acetic acid, and 30% hydrogen peroxide. This approach, which takes up to 1 h, made it possible to isolate chitin from the tube-like skeleton of A. archeri and to demonstrate the presence of this biopolymer in this sponge for the first time. Additionally, this procedure does not deacetylate chitin to chitosan and enables the recovery of ready-to-use 3D chitin scaffolds without destruction of the unique tube-like fibrous interconnected structure of the isolated biomaterial. Furthermore, these mechanically stressed fibers still have the capacity for saturation with water, methylene blue dye, crude oil, and blood, which is necessary for the application of such renewable 3D chitinous centimeter-sized scaffolds in diverse technological and biomedical fields.
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Affiliation(s)
- Christine Klinger
- Institute of Physical Chemistry, TU Bergakademie-Freiberg, Leipziger str. 29, 09559 Freiberg, Germany.
| | - Sonia Żółtowska-Aksamitowska
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, 61131 Poznan, Poland.
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, Gustav Zeuner Str. 3, 09599 Freiberg, Germany.
| | - Marcin Wysokowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, 61131 Poznan, Poland.
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, Gustav Zeuner Str. 3, 09599 Freiberg, Germany.
| | - Mikhail V Tsurkan
- Leibnitz Institute of Polymer Research Dresden, 01069 Dresden, Germany.
| | - Roberta Galli
- Clinical Sensoring and Monitoring, Department of Anesthesiology and Intensive Care Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany.
| | - Iaroslav Petrenko
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, Gustav Zeuner Str. 3, 09599 Freiberg, Germany.
| | - Tomasz Machałowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, 61131 Poznan, Poland.
| | - Alexander Ereskovsky
- Institut Méditerranéen de Biodiversité et d'Ecologie (IMBE), CNRS, IRD, Aix Marseille Université, Avignon Université, Station Marine d'Endoume, 13003 Marseille, France.
- Department of Embryology, Faculty of Biology, Saint-Petersburg State University, 19992 Saint-Petersburg, Russia.
| | - Rajko Martinović
- Institute of Marine Biology, University of Montenegro, 85330 Kotor, Montenegro.
| | - Lyubov Muzychka
- Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, Murmanska Str., 1, 02094 Kyiv, Ukraine.
| | - Oleg B Smolii
- Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, Murmanska Str., 1, 02094 Kyiv, Ukraine.
| | - Nicole Bechmann
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany.
| | - Viatcheslav Ivanenko
- Department of Invertebrate Zoology, Biological Faculty, Lomonosov Moscow State University, 119992 Moscow, Russia.
- Naturalis Biodiversity Center, 2332 Leiden, The Netherlands.
| | - Peter J Schupp
- Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Carl-von-Ossietzky-Straße 9-11, 26111 Oldenburg, Germany.
| | - Teofil Jesionowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, 61131 Poznan, Poland.
| | - Marco Giovine
- Department of Sciences of Earth, Environment and Life, University of Genoa, Corso Europa 26, 16132 Genova, Italy.
| | - Yvonne Joseph
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, Gustav Zeuner Str. 3, 09599 Freiberg, Germany.
| | - Stefan R Bornstein
- Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany.
- Diabetes and Nutritional Sciences Division, King's College London, London WC2R 2LS, UK.
| | - Alona Voronkina
- National Pirogov Memorial Medical University, Vinnytsya, Department of Pharmacy, Pirogov str. 56, 21018, Vinnytsia, Ukraine.
| | - Hermann Ehrlich
- Institute of Electronics and Sensor Materials, TU Bergakademie Freiberg, Gustav Zeuner Str. 3, 09599 Freiberg, Germany.
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Nassef HM, Hagar M, Othman AM. Effect of GO nanosheets on spectrophotometric determination of tyrosine in urine and serum using nitrosonaphthol. Anal Biochem 2018; 558:12-18. [PMID: 30076789 DOI: 10.1016/j.ab.2018.07.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 07/25/2018] [Accepted: 07/26/2018] [Indexed: 01/02/2023]
Abstract
Here, we aimed to use graphene oxide to improve the selectivity and sensitivity of Tyr determination via the reaction with 1-nitroso-2-naphthol as a selective reagent of Tyr. The reaction between Tyr and 1-nitroso-2-naphthol in absence and presence of GO was studied spectrophotometrically. Different parameters such as concentrations, temperature, incubation time were optimized. The obtained data showed that the maximum absorbance was achieved by using 2 mL of 0.03% 1-nitroso-2-naphthol at temperature 60 °C for 10 min. On the basis of calibration curve of various concentrations of Tyr in the presence of 20 μg mL-1 GO, the limit of detection was 6.4 × 10-6 M (1.15 μg mL-1), where in absence of GO was 1.1 × 10-5 M (19.9 μg mL-1). The selectivity of Tyr in presence of other amino acids and phenols was studied with and without GO. The data obtained revealed that the selectivity of Tyr in presence of GO with respect to some amino acids and phenols was improved. The proposed method has been applied for the determination of Tyr in urine and serum samples. Therefore, GO is a powerful catalytic surface for the sensitive and selective determination of Try in biological fluids.
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Affiliation(s)
- Hossam M Nassef
- Chemistry Department, Faculty of Science at Yanbu, Taibah University, Yanbu 46423, Saudi Arabia; Chemistry Department, Faculty of Science, Damietta University, Damietta 34517, Egypt.
| | - Mohamed Hagar
- Chemistry Department, Faculty of Science at Yanbu, Taibah University, Yanbu 46423, Saudi Arabia; Chemistry Department, Faculty of Science, Alexandria University, Alexandria 23132, Egypt.
| | - Abdelhameed M Othman
- Chemistry Department, Faculty of Science at Yanbu, Taibah University, Yanbu 46423, Saudi Arabia; Environmental Biotechnology Department, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Sadat City 32897, Egypt.
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23
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Reisdorph R, Littrell-Miller B, Powell R, Reisdorph N. A mass spectrometry based predictive strategy reveals ADAP1 is phosphorylated at tyrosine 364. Rapid Commun Mass Spectrom 2018; 32:1173-1180. [PMID: 29659066 DOI: 10.1002/rcm.8140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/26/2018] [Accepted: 03/30/2018] [Indexed: 06/08/2023]
Abstract
RATIONALE The goal of this work was to identify phosphorylation sites within the amino acid sequence of human ADAP1. Using traditional mass spectrometry based techniques we were unable to produce interpretable spectra demonstrating modification by phosphorylation. This prompted us to employ a strategy in which phosphorylated peptides were first predicted using peptide mapping followed by targeted MS/MS acquisition. METHODS ADAP1 was immunoprecipitated from extracts of HEK293 cells stably transfected with ADAP1 cDNA. Immunoprecipitated ADAP1 was digested with proteolytic enzymes and analyzed by LC/MS in MS1 mode by high-resolution quadrupole time-of-flight mass spectrometry (QTOF-MS). Peptide molecular features were extracted using an untargeted data-mining algorithm. Extracted peptide neutral masses were matched against the ADAP1 amino acid sequence with phosphorylation included as a predicted modification. Peptides with predicted phosphorylation sites were analyzed by targeted LC/MS2 . Acquired MS2 spectra were then analyzed using database search engines to confirm phosphorylation. Spectra of phosphorylated peptides were validated by manual interpretation. Further confirmation was performed by manipulating phospho-peptide abundance using calf intestinal phosphatase (CIP) and the phorbol ester, phorbol 12-myristate 13-acetate (PMA). RESULTS Of five predicted phosphopeptides, one, comprised of the sequence AVDRPMLPQEYAVEAHFK, was confirmed to be phosphorylated on a tyrosine at position 364. Pre-treatment of cells with PMA prior to immunoprecipitation increased the ratio of phosphorylated to unphosphorylated peptide as determined by area counts of extracted ion chromatograms (EIC). Addition of CIP to immunoprecipitation reactions eliminated the phosphorylated form. CONCLUSIONS A novel phosphorylation site was identified at tyrosine 364. Phosphorylation at this site is increased by treatment with PMA. PMA promotes membrane translocation and activation of protein kinase C (PKC), indicating that tyrosine 364 is phosphorylated by a PKC-dependent mechanism.
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Affiliation(s)
- Richard Reisdorph
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA
| | - BobbiJo Littrell-Miller
- Environment, Safety, Health & Quality Office, National Renewable Energy Laboratory (NREL), 15013 Denver West Parkway, Golden, CO, USA
| | - Roger Powell
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA
| | - Nichole Reisdorph
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA
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24
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Goyer A, Pellé J. Relationships between tyrosine, phenylalanine, chlorogenic acid, and ascorbic acid concentrations and blackspot biochemical potential and blackspot susceptibility in stored russet potatoes. J Sci Food Agric 2018; 98:3735-3740. [PMID: 29315596 DOI: 10.1002/jsfa.8884] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 01/02/2018] [Accepted: 01/04/2018] [Indexed: 05/23/2023]
Abstract
BACKGROUND Blackspot in potato is an internal tissue discoloration that occurs during handling and transport of potato tubers. Blackspot is cosmetically undesirable and represents a huge economic cost for the potato industry. The aim of this study was to test whether concentrations of certain metabolites in the potato tuber cortex could predict blackspot susceptibility. RESULTS Seven russet potato varieties were stored for eight months at 8.8 °C. Stored tubers were subjected to mechanical impact and evaluated for blackspot susceptibility. A blackspot susceptibility index was calculated for each variety by determining an index for the percentage of the tuber cortex area that was covered with blackspot, and an index for the intensity of blackspot discoloration. Concentrations of tyrosine, chlorogenic acid, phenylalanine, and ascorbic acid, and blackspot biochemical potential of tubers to synthesize pigments were measured in the tuber cortex. Blackspot indices, metabolites concentrations and blackspot biochemical potential varied significantly between varieties. Tyrosine concentrations strongly, significantly, and positively correlated with blackspot biochemical potential. Phenylalanine concentrations showed good, significant, and positive correlation with blackspot biochemical potential and discoloration index. None of the analyzed metabolites correlated with blackspot susceptibility. CONCLUSION Concentrations of tyrosine and phenylalanine explained up to ∼80% of the variation in blackspot biochemical potential between varieties but did not correlate with blackspot susceptibility. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Aymeric Goyer
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, USA
- Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston, OR, USA
| | - Julien Pellé
- Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston, OR, USA
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25
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Knight AR, Taylor EL, Lukaszewski R, Jensen KT, Jones HE, Carré JE, Isupov MN, Littlechild JA, Bailey SJ, Brewer E, McDonald TJ, Pitt AR, Spickett CM, Winyard PG. A high-sensitivity electrochemiluminescence-based ELISA for the measurement of the oxidative stress biomarker, 3-nitrotyrosine, in human blood serum and cells. Free Radic Biol Med 2018; 120:246-254. [PMID: 29555590 DOI: 10.1016/j.freeradbiomed.2018.03.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 03/13/2018] [Accepted: 03/14/2018] [Indexed: 02/02/2023]
Abstract
The generation of 3-nitrotyrosine, within proteins, is a post-translational modification resulting from oxidative or nitrative stress. It has been suggested that this modification could be used as a biomarker for inflammatory diseases. Despite the superiority of mass spectrometry-based determinations of nitrotyrosine, in a high-throughput clinical setting the measurement of nitrotyrosine by an enzyme-linked immunosorbent assay (ELISA) is likely to be more cost-effective. ELISAs offer an alternative means to detect nitrotyrosine, but many commercially available ELISAs are insufficiently sensitive to detect nitrotyrosine in healthy human serum. Here, we report the development, validation and clinical application of a novel electrochemiluminescence-based ELISA for nitrotyrosine which provides superior sensitivity (e.g. a 50-fold increase in sensitivity compared with one of the tested commercial colorimetric ELISAs). This nitrotyrosine ELISA has the following characteristics: a lower limit of quantitation of 0.04 nM nitrated albumin equivalents; intra- and inter-assay coefficients of variation of 6.5% and 11.3%, respectively; a mean recovery of 106 ± 3% and a mean linearity of 0.998 ± 0.001. Far higher nitration levels were measured in normal human blood cell populations when compared to plasma. Mass spectrometry was used to validate the new ELISA method. The analysis of the same set of chemically modified albumin samples using the ELISA method and mass spectrometry showed good agreement for the relative levels of nitration present in each sample. The assay was applied to serum samples from patients undergoing elective surgery which induces the human inflammatory response. Matched samples were collected before and one day after surgery. An increase in nitration was detected following surgery (median (IQR): 0.59 (0.00-1.34) and 0.97 (0.00-1.70) nitrotyrosine (fmol of nitrated albumin equivalents/mg protein) for pre- and post-surgery respectively. The reported assay is suitable for nitrotyrosine determination in patient serum samples, and may also be applicable as a means to determine oxidative stress in primary and cultured cell populations.
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Affiliation(s)
- Annie R Knight
- University of Exeter Medical School, St Luke's Campus, Magdalen Road, Exeter EX1 2LU, UK
| | - Emma L Taylor
- University of Exeter Medical School, St Luke's Campus, Magdalen Road, Exeter EX1 2LU, UK
| | | | - Karina Tveen Jensen
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Helen E Jones
- CBR Division, Dstl, Porton Down, Salisbury SP4 0JQ, UK
| | - Jane E Carré
- University of Exeter Medical School, St Luke's Campus, Magdalen Road, Exeter EX1 2LU, UK
| | - Michail N Isupov
- Henry Wellcome Building for Biocatalysis, Biosciences, University of Exeter, Stocker Road, Exeter EX4 4QD, UK
| | - Jennifer A Littlechild
- Henry Wellcome Building for Biocatalysis, Biosciences, University of Exeter, Stocker Road, Exeter EX4 4QD, UK
| | - Stephen J Bailey
- Sport and Health Sciences, Richards Building, University of Exeter, St Luke's Campus, Magdalen Road, Exeter EX1 2LU, UK
| | - Emily Brewer
- Clinical Chemistry, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter EX2 5DW, UK
| | - Timothy J McDonald
- Clinical Chemistry, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter EX2 5DW, UK
| | - Andrew R Pitt
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Corinne M Spickett
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Paul G Winyard
- University of Exeter Medical School, St Luke's Campus, Magdalen Road, Exeter EX1 2LU, UK.
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26
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Chen G, Zhang Y, Trinidad JC, Dann C. Distinguishing Sulfotyrosine Containing Peptides from their Phosphotyrosine Counterparts Using Mass Spectrometry. J Am Soc Mass Spectrom 2018; 29:455-462. [PMID: 29313205 DOI: 10.1007/s13361-017-1854-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Revised: 11/15/2017] [Accepted: 11/18/2017] [Indexed: 06/07/2023]
Abstract
Sulfotyrosine and phosphotyrosine are two post-translational modifications present in higher eukaryotes. A simple and direct mass spectrometry method to distinguish between these modifications is crucial to advance our understanding of the sulfoproteome. While sulfation and phosphorylation are nominally isobaric, the accurate mass of the sulfuryl moiety is 9.6 mDa less than the phosphoryl moiety. Based on this difference, we have used an Orbitrap Fusion Lumos mass spectrometer to characterize, resolve, and distinguish between sulfotyrosine and phosphotyrosine modifications using a set of model peptides. Multiple fragmentation techniques, namely HCD, CID, ETD, ETciD, and EThcD, have been used to compare the different fragmentation behaviors between peptides modified with these species. Sulfotyrosine undergoes neutral loss using HCD and CID, but the sulfuryl moiety is largely stable under ETD. In contrast, phosphotyrosine is stable during fragmentation using all these methods. This differential stability provides a mechanism to distinguish sulfopeptides from phosphopeptides. Based on the rigorous characterization presented herein, this work serves as a model for accurate identification of phosphotyrosine and, more challenging, sulfotyrosine, in complex proteomic samples. Graphical Abstract ᅟ.
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Affiliation(s)
- Guangming Chen
- Department of Chemistry and Interdisciplinary Graduate Program in Biochemistry, Indiana University, Bloomington, IN, 47405, USA
| | - Yixiang Zhang
- Department of Chemistry and Laboratory for Biological Mass Spectrometry, Indiana University, Bloomington, IN, 47405, USA
| | - Jonathan C Trinidad
- Department of Chemistry and Laboratory for Biological Mass Spectrometry, Indiana University, Bloomington, IN, 47405, USA.
| | - Charles Dann
- Department of Chemistry and Interdisciplinary Graduate Program in Biochemistry, Indiana University, Bloomington, IN, 47405, USA.
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Chaki M, Sánchez-Calvo B, Carreras A, Valderrama R, Begara-Morales JC, Corpas FJ, Barroso JB. Identification of Tyrosine and Nitrotyrosine with a Mixed-Mode Solid-Phase Extraction Cleanup Followed by Liquid Chromatography-Electrospray Time-of-Flight Mass Spectrometry in Plants. Methods Mol Biol 2018; 1747:161-169. [PMID: 29600458 DOI: 10.1007/978-1-4939-7695-9_13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In higher plants, there is a growing interest in the study of protein tyrosine nitration (NO2Tyr) as well as the identification of in vivo nitrated proteins. Different methods have been developed for identifying nitrotyrosine in biological samples. However, these analyses are difficult because tyrosine nitration is a very low-abundance posttranslational protein modification (PTM) and the lack of efficient enrichment methods for detection. The identification and quantification of NO2Tyr in proteins has represented a challenge for researchers.In this chapter a new method for determining NO2Tyr and tyrosine (Tyr) in Arabidopsis thaliana cell-suspension culture extracts is proposed. The quantification was performed using a simple, sensitive, and specific sample preparation assay based on mixed-mode solid-phase extraction (SPE) which was developed for the quantification of trace NO2Tyr in Arabidopsis extracts by liquid chromatography-electrospray time-of-flight mass spectrometry (LC-TOFMS).
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Affiliation(s)
- Mounira Chaki
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Center for Advanced Studies in Olive Grove and Olive Oils, Faculty of Experimental Sciences, University of Jaén, Jaén, Spain
| | - Beatriz Sánchez-Calvo
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Center for Advanced Studies in Olive Grove and Olive Oils, Faculty of Experimental Sciences, University of Jaén, Jaén, Spain
| | - Alfonso Carreras
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Center for Advanced Studies in Olive Grove and Olive Oils, Faculty of Experimental Sciences, University of Jaén, Jaén, Spain
| | - Raquel Valderrama
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Center for Advanced Studies in Olive Grove and Olive Oils, Faculty of Experimental Sciences, University of Jaén, Jaén, Spain
| | - Juan C Begara-Morales
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Center for Advanced Studies in Olive Grove and Olive Oils, Faculty of Experimental Sciences, University of Jaén, Jaén, Spain
| | - Francisco J Corpas
- Group of Antioxidants, Free Radicals, and Nitric Oxide in Biotechnology, Food, and Agriculture, Department of Biochemistry, Cellular and Molecular Biology of Plants, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
| | - Juan B Barroso
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Center for Advanced Studies in Olive Grove and Olive Oils, Faculty of Experimental Sciences, University of Jaén, Jaén, Spain.
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Steinberg X, Kasimova MA, Cabezas-Bratesco D, Galpin JD, Ladron-de-Guevara E, Villa F, Carnevale V, Islas L, Ahern CA, Brauchi SE. Conformational dynamics in TRPV1 channels reported by an encoded coumarin amino acid. eLife 2017; 6:e28626. [PMID: 29206105 PMCID: PMC5716661 DOI: 10.7554/elife.28626] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 10/22/2017] [Indexed: 11/13/2022] Open
Abstract
TRPV1 channels support the detection of noxious and nociceptive input. Currently available functional and structural data suggest that TRPV1 channels have two gates within their permeation pathway: one formed by a 'bundle-crossing' at the intracellular entrance and a second constriction at the selectivity filter. To describe conformational changes associated with channel gating, the fluorescent non-canonical amino acid coumarin-tyrosine was genetically encoded at Y671, a residue proximal to the selectivity filter. Total internal reflection fluorescence microscopy was performed to image the conformational dynamics of the channels in live cells. Photon counts and optical fluctuations from coumarin encoded within TRPV1 tetramers correlates with channel activation by capsaicin, providing an optical marker of conformational dynamics at the selectivity filter. In agreement with the fluorescence data, molecular dynamics simulations display alternating solvent exposure of Y671 in the closed and open states. Overall, the data point to a dynamic selectivity filter that may serve as a gate for permeation.
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Affiliation(s)
- Ximena Steinberg
- Physiology Department, Faculty of MedicineUniversidad Austral de ChileValdiviaChile
| | - Marina A Kasimova
- Institute for Computational Molecular ScienceTemple UniversityPhiladelphiaUnited States
| | | | - Jason D Galpin
- Department of Molecular Physiology and BiophysicsUniversity of IowaIowa CityUnited States
| | - Ernesto Ladron-de-Guevara
- Departamento de Fisiología, Facultad de MedicinaUniversidad Nacional Autónoma de MéxicoCiudad de MéxicoMexico
| | - Federica Villa
- Dipartimento di Elettronica, Informazione e Bioingegneria (DEIB)Politecnico di Milano (POLIMI)MilanoItaly
| | - Vincenzo Carnevale
- Institute for Computational Molecular ScienceTemple UniversityPhiladelphiaUnited States
| | - Leon Islas
- Departamento de Fisiología, Facultad de MedicinaUniversidad Nacional Autónoma de MéxicoCiudad de MéxicoMexico
| | - Christopher A Ahern
- Department of Molecular Physiology and BiophysicsUniversity of IowaIowa CityUnited States
| | - Sebastian E Brauchi
- Physiology Department, Faculty of MedicineUniversidad Austral de ChileValdiviaChile
- Millennium Nucleus of Ion Channels-associated Diseases (MiNICAD)Iniciativa Cientifica MilenioSantiagoChile
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Chang JYH, Chow LW, Dismuke WM, Ethier CR, Stevens MM, Stamer WD, Overby DR. Peptide-Functionalized Fluorescent Particles for In Situ Detection of Nitric Oxide via Peroxynitrite-Mediated Nitration. Adv Healthc Mater 2017; 6:1700383. [PMID: 28512791 PMCID: PMC5568941 DOI: 10.1002/adhm.201700383] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Indexed: 12/17/2022]
Abstract
Nitric oxide (NO) is a free radical signaling molecule that plays a crucial role in modulating physiological homeostasis across multiple biological systems. NO dysregulation is linked to the pathogenesis of multiple diseases; therefore, its quantification is important for understanding pathophysiological processes. The detection of NO is challenging, typically limited by its reactive nature and short half-life. Additionally, the presence of interfering analytes and accessibility to biological fluids in the native tissues make the measurement technically challenging and often unreliable. Here, a bio-inspired peptide-based NO sensor is developed, which detects NO-derived oxidants, predominately peroxynitrite-mediated nitration of tyrosine residues. It is demonstrated that these peptide-based NO sensors can detect peroxynitrite-mediated nitration in response to physiological shear stress by endothelial cells in vitro. Using the peptide-conjugated fluorescent particle immunoassay, peroxynitrite-mediated nitration activity with a detection limit of ≈100 × 10-9 m is detected. This study envisions that the NO detection platform can be applied to a multitude of applications including monitoring of NO activity in healthy and diseased tissues, localized detection of NO production of specific cells, and cell-based/therapeutic screening of peroxynitrite levels to monitor pronitroxidative stress in biological samples.
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Affiliation(s)
- Jason Y. H. Chang
- Department of BioengineeringImperial College LondonLondonSW7 2AZUK
- Department of OphthalmologyDuke University School of MedicineDurhamNC27710USA
| | - Lesley W. Chow
- Department of Materials, Department of Bioengineering, and Institute of Biomedical EngineeringImperial College LondonLondonSW7 2AZUK
| | - W. Michael Dismuke
- Department of OphthalmologyDuke University School of MedicineDurhamNC27710USA
| | - C. Ross Ethier
- Department of BioengineeringImperial College LondonLondonSW7 2AZUK
- Wallace H. Coulter Department of Biomedical EngineeringGeorgia Institute of Technology and Emory UniversityAtlantaGA30332USA
| | - Molly M. Stevens
- Department of Materials, Department of Bioengineering, and Institute of Biomedical EngineeringImperial College LondonLondonSW7 2AZUK
| | - W. Daniel Stamer
- Department of OphthalmologyDuke University School of MedicineDurhamNC27710USA
| | - Darryl R. Overby
- Department of BioengineeringImperial College LondonLondonSW7 2AZUK
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El-Bagary RI, Elkady EF, Farid NA, Youssef NF. Validated spectrofluorimetric methods for the determination of apixaban and tirofiban hydrochloride in pharmaceutical formulations. Spectrochim Acta A Mol Biomol Spectrosc 2017; 174:326-330. [PMID: 27984753 DOI: 10.1016/j.saa.2016.11.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/11/2016] [Accepted: 11/28/2016] [Indexed: 06/06/2023]
Abstract
Apixaban and Tirofiban Hydrochloride are low molecular weight anticoagulants. The two drugs exhibit native fluorescence that allow the development of simple and valid spectrofluorimetric methods for the determination of Apixaban at λ ex/λ em=284/450nm and tirofiban HCl at λ ex/λ em=227/300nm in aqueous media. Different experimental parameters affecting fluorescence intensities were carefully studied and optimized. The fluorescence intensity-concentration plots were linear over the ranges of 0.2-6μgml-1 for apixaban and 0.2-5μgml-1 for tirofiban HCl. The limits of detection were 0.017 and 0.019μgml-1 and quantification limits were 0.057 and 0.066μgml-1 for apixaban and tirofiban HCl, respectively. The fluorescence quantum yield of apixaban and tirofiban were calculated with values of 0.43 and 0.49. Method validation was evaluated for linearity, specificity, accuracy, precision and robustness as per ICH guidelines. The proposed spectrofluorimetric methods were successfully applied for the determination of apixaban in Eliquis tablets and tirofiban HCl in Aggrastat intravenous infusion. Tolerance ratio was tested to study the effect of foreign interferences from dosage forms excipients. Using Student's t and F tests, revealed no statistically difference between the developed spectrofluorimetric methods and the comparison methods regarding the accuracy and precision, so can be contributed to the analysis of apixaban and tirofiban HCl in QC laboratories as an alternative method.
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Affiliation(s)
- Ramzia I El-Bagary
- Pharmaceutical Chemistry Department, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University, Egypt; Pharmaceutical Chemistry Department, Faculty of Pharmacy, Cairo University, Egypt
| | - Ehab F Elkady
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Cairo University, Egypt
| | - Naira A Farid
- Pharmaceutical Chemistry Department, National organization for Drug Control and Research (NODCAR), Giza, Egypt.
| | - Nadia F Youssef
- Pharmaceutical Chemistry Department, National organization for Drug Control and Research (NODCAR), Giza, Egypt
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Abstract
The nitric oxide radical (•NO) released from tobacco-related compounds induces DNA damage, protein modifications, and cellular toxicity through the formation of peroxynitrite (ONOO−), the reaction product of •NO and the oxygen radical, superoxide. We hypothesize that tobacco-related compounds are cytotoxic and induce quantifiable DNA single-strand breaks in immortalized hamster cheek pouch (POII) cells, and that an amino acid marker of ONOO− injury, namely, 3-nitrotyrosine (3-NT), is detectable in hamster cheek pouch tissues chronically exposed to these compounds. We observed a dose-dependent decrease in POII cell viability with increasing tobacco-related compound concentrations, as well as a dose-dependent increase in DNA strand breaks. Semi-quantitative immunohistochemistry showed intense 3-NT immunoreactivity in hamster tissues treated with tobacco-related compounds compared with controls (p < 0.005). Our results suggest that tobacco-related compounds, including nicotine, are genotoxic, and that 3-NT is a quantifiable marker of ONOO− damage in intact hamster cheek pouch tissues.
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Affiliation(s)
- R D C Barley
- Division of Oral & Maxillofacial Radiology, Department of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, DPC 2085, Edmonton, AB T6G 2N8, Canada
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Judacewski P, Los PR, Benvenutti L, Alberti A, Simões DR, Nogueira A. Quality assessment of white mold-ripened cheeses manufactured with different lactic cultures. J Sci Food Agric 2016; 96:3831-3837. [PMID: 26692071 DOI: 10.1002/jsfa.7577] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 12/04/2015] [Accepted: 12/11/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND White mold-ripened cheeses were investigated with the objective of proposing a colorimetric method to monitor the surface growth of Penicillium candidum and to evaluate the influence of the mesophilic (homofermentative (QMO) and heterofermentative (QMLD)) and thermophilic (QT) starter cultures on the physicochemical composition and sensory description. RESULTS The whiteness index was effective in proving the appearance of superficial mycelium and the stability of white mold growth. The lactic cultures showed significant influence on most of the physicochemical analyses. The cheese made with thermophilic lactic culture had a 1 day gain in the growth of mycelium on the surface; nevertheless, the appearance of this product was potentially not acceptable for consumers. The heterofermentative mesophilic cheese had a better appearance and texture profile. However, the homofermentative mesophilic cheese showed aspects of fresh cheese and was acceptable for a wide range of consumers. CONCLUSION The whiteness index was efficient to monitor the surface growth of P. candidum. The highest proteolytic effect was found in the QMLD and QT cultures. However, the cheese elaborated with the QMLD culture showed the best sensory acceptance. © 2015 Society of Chemical Industry.
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Affiliation(s)
- Priscila Judacewski
- Postgraduate Program in Food Science and Technology, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti 4748, CEP 84.030-900, Ponta Grossa, PR, Brazil
| | - Paulo R Los
- Postgraduate Program in Food Science and Technology, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti 4748, CEP 84.030-900, Ponta Grossa, PR, Brazil
| | - Laís Benvenutti
- Department of Food Engineering, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti 4748, CEP 84.030-900, Ponta Grossa, PR, Brazil
| | - Aline Alberti
- Department of Food Engineering, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti 4748, CEP 84.030-900, Ponta Grossa, PR, Brazil
| | - Deise Rs Simões
- Department of Food Engineering, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti 4748, CEP 84.030-900, Ponta Grossa, PR, Brazil
| | - Alessandro Nogueira
- Postgraduate Program in Food Science and Technology, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti 4748, CEP 84.030-900, Ponta Grossa, PR, Brazil
- Department of Food Engineering, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti 4748, CEP 84.030-900, Ponta Grossa, PR, Brazil
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He XS, Xi BD, Gao RT, Zhang H, Dang QL, Li D, Huang CH. Insight into the composition and degradation potential of dissolved organic matter with different hydrophobicity in landfill leachates. Chemosphere 2016; 144:75-80. [PMID: 26347928 DOI: 10.1016/j.chemosphere.2015.08.071] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 08/14/2015] [Accepted: 08/23/2015] [Indexed: 06/05/2023]
Abstract
Dissolved organic matter (DOM) isolated from the leachates with different landfill ages was fractionated into hydrophobic acid (HOA), hydrophobic neutral (HON), hydrophobic base (HOB) fractions and hydrophilic matter (HIM) based on hydrophobicity, and the composition and degradation potential of the bulk DOM and its fractions were investigated by excitation-emission matrix fluorescence spectra coupled with parallel factor analysis. Results showed that the bulk DOM comprised fulvic-, humic-, tryptophan- and tyrosine-like substances, as well as component C1, whose composition and origin was unidentified. Landfill process increased the content of component C1, fulvic- and humic-like matter. The HON fractions comprised primarily component C1 and tyrosine-like matter. The HOA, HOB and HIM fractions isolated from the young leachates consisted mainly of tryptophan- and tyrosine-like substances. As to the intermediate and old leachates, the HOA and HOB fractions comprised mainly component C1, while the HIM comprised mainly fulvic-like matter. The HIM showed the most resistant against biodegradation among the four fractions, and was the main component of leachate treatment. Advanced oxidation and/or membrane treatment are recommended to remove the HIM fraction due to its hydrophilic and stable characteristics.
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Affiliation(s)
- Xiao-Song He
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation Base of Groundwater & Environmental System Engineering, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Bei-Dou Xi
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation Base of Groundwater & Environmental System Engineering, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Ru-Tai Gao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation Base of Groundwater & Environmental System Engineering, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Hui Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation Base of Groundwater & Environmental System Engineering, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Qiu-Ling Dang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation Base of Groundwater & Environmental System Engineering, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Dan Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation Base of Groundwater & Environmental System Engineering, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Cai-Hong Huang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation Base of Groundwater & Environmental System Engineering, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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Feng X, Li C, Ullah N, Hackman RM, Chen L, Zhou G. Potential Biomarker of Myofibrillar Protein Oxidation in Raw and Cooked Ham: 3-Nitrotyrosine Formed by Nitrosation. J Agric Food Chem 2015; 63:10957-10964. [PMID: 26593775 DOI: 10.1021/acs.jafc.5b04107] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The stability of cured meat products is increased by the protection of its proteins from oxidation by sodium nitrite (NaNO2) during processing. This study investigated the effects of NaNO2 (0, 50, 100, 200, and 400 mg/kg) on the physiochemical and structural characteristics of myofibrillar protein (MP) in raw and cooked ham. The NaNO2 showed a dose-dependent antioxidant effect, by inhibiting carbonyl formation, dityrosine formation, and denaturation of MP, and a nitrosative effect, through the formation of 3-Nitrotyrosine (3-NT). The 3-NT content within MP of raw ham had distinct negative correlations with sulfhydryl content and surface hydrophobicity. The 3-NT content within MP of cooked ham had significantly negative correlations with carbonyl, sulfhydryl content and turbidity and had significantly positive correlations with disulfide content. These results indicated that 3-NT may be a potential marker for protein oxidation in raw and cooked cured meat products.
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Affiliation(s)
- Xianchao Feng
- College of Food Science and Engineering, Northwest A&F University , No. 28 Xinong Road, Yangling, Shaanxi 712100, China
- National Center of Meat Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, College of Food Science and Technology, Nanjing Agricultural University , Nanjing, Jiangsu 210095, China
| | - Chenyi Li
- College of Food Science and Engineering, Northwest A&F University , No. 28 Xinong Road, Yangling, Shaanxi 712100, China
| | - Niamat Ullah
- College of Food Science and Engineering, Northwest A&F University , No. 28 Xinong Road, Yangling, Shaanxi 712100, China
- Department of Human Nutrition, The University Of Agriculture Peshawar , Khyber Pakhtunkhwa 25000, Pakistan
| | - Robert M Hackman
- Department of Nutrition, University of California-Davis , One Shields Avenue, Davis, California 95616, United States
| | - Lin Chen
- College of Food Science and Engineering, Northwest A&F University , No. 28 Xinong Road, Yangling, Shaanxi 712100, China
| | - Guanghong Zhou
- National Center of Meat Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, College of Food Science and Technology, Nanjing Agricultural University , Nanjing, Jiangsu 210095, China
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35
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Peng F, Li J, Guo T, Yang H, Li M, Sang S, Li X, Desiderio DM, Zhan X. Nitroproteins in Human Astrocytomas Discovered by Gel Electrophoresis and Tandem Mass Spectrometry. J Am Soc Mass Spectrom 2015; 26:2062-76. [PMID: 26450359 DOI: 10.1007/s13361-015-1270-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 08/20/2015] [Accepted: 09/01/2015] [Indexed: 05/17/2023]
Abstract
Protein tyrosine nitration is involved in the pathogenesis of highly fatal astrocytomas, a type of brain cancer. To understand the molecular mechanisms of astrocytomas and to discover new biomarkers/therapeutic targets, we sought to identify nitroproteins in human astrocytoma tissue. Anti-nitrotyrosine immunoreaction-positive proteins from a high-grade astrocytoma tissue were detected with two-dimensional gel electrophoresis (2DGE)-based nitrotyrosine immunoblots, and identified with liquid chromatography-tandem mass spectrometry (LC-MS/MS). Fifty-seven nitrotyrosine immunopositive protein spots were detected. A total of 870 proteins (nitrated and non-nitrated) in nitrotyrosine-immunopositive 2D gel spots were identified, and 18 nitroproteins and their 20 nitrotyrosine sites were identified with MS/MS analysis. These nitroproteins participate in multiple processes, including drug-resistance, signal transduction, cytoskeleton, transcription and translation, cell proliferation and apoptosis, immune response, phenotypic dedifferentiation, cell migration, and metastasis. Among those nitroproteins that might play a role in astrocytomas was nitro-sorcin, which is involved in drug resistance and metastasis and might play a role in the spread and treatment of an astrocytoma. Semiquantitative immune-based measurements of different sorcin expressions were found among different grades of astrocytomas relative to controls, and a semiquantitative increased nitration level in high-grade astrocytoma relative to control. Nitro-β-tubulin functions in cytoskeleton and cell migration. Semiquantitative immunoreactivity of β-tubulin showed increased expression among different grades of astrocytomas relative to controls and semiquantitatively increased nitration level in high-grade astrocytoma relative to control. Each nitroprotein was rationalized and related to the corresponding functional system to provide new insights into tyrosine nitration and its potential role in the pathogenesis of astrocytoma formation. Graphical Abstract ᅟ.
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Affiliation(s)
- Fang Peng
- Key Laboratory of Cancer Proteomics of Chinese Ministry of Health, Xiangya Hospital, Central South University, Hunan, 410008, People's Republic of China
- Hunan Engineering Laboratory for Structural Biology and Drug Design, Xiangya Hospital, Central South University, Hunan, 410008, People's Republic of China
- State Local Joint Engineering Laboratory for Anticancer Drugs, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Jianglin Li
- Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha, Hunan, 410018, People's Republic of China
| | - Tianyao Guo
- Key Laboratory of Cancer Proteomics of Chinese Ministry of Health, Xiangya Hospital, Central South University, Hunan, 410008, People's Republic of China
- Hunan Engineering Laboratory for Structural Biology and Drug Design, Xiangya Hospital, Central South University, Hunan, 410008, People's Republic of China
- State Local Joint Engineering Laboratory for Anticancer Drugs, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Haiyan Yang
- Key Laboratory of Cancer Proteomics of Chinese Ministry of Health, Xiangya Hospital, Central South University, Hunan, 410008, People's Republic of China
- Hunan Engineering Laboratory for Structural Biology and Drug Design, Xiangya Hospital, Central South University, Hunan, 410008, People's Republic of China
- State Local Joint Engineering Laboratory for Anticancer Drugs, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
- Department of Lung Cancer and Gastroenterology, Hunan Cancer Hospital, Changsha, Hunan, 410013, People's Republic of China
| | - Maoyu Li
- Key Laboratory of Cancer Proteomics of Chinese Ministry of Health, Xiangya Hospital, Central South University, Hunan, 410008, People's Republic of China
- Hunan Engineering Laboratory for Structural Biology and Drug Design, Xiangya Hospital, Central South University, Hunan, 410008, People's Republic of China
- State Local Joint Engineering Laboratory for Anticancer Drugs, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Shushan Sang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Xuejun Li
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Dominic M Desiderio
- The Charles B. Stout Neuroscience Mass Spectrometry Laboratory, Department of Neurology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Xianquan Zhan
- Key Laboratory of Cancer Proteomics of Chinese Ministry of Health, Xiangya Hospital, Central South University, Hunan, 410008, People's Republic of China.
- Hunan Engineering Laboratory for Structural Biology and Drug Design, Xiangya Hospital, Central South University, Hunan, 410008, People's Republic of China.
- State Local Joint Engineering Laboratory for Anticancer Drugs, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China.
- The State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan, 410008, People's Republic of China.
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Wu Q, Fang A, Li H, Zhang Y, Yao S. Enzymatic-induced upconversion photoinduced electron transfer for sensing tyrosine in human serum. Biosens Bioelectron 2015; 77:957-62. [PMID: 26544870 DOI: 10.1016/j.bios.2015.10.084] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 10/17/2015] [Accepted: 10/28/2015] [Indexed: 12/20/2022]
Abstract
This paper reports a novel nanosensor for tyrosine based on photoinduced electron-transfer (PET) between NaYF4:Yb, Tm upconversion nanoparticles (UCNPs) and melanin-like polymers. Melanin-like films were obtained from catalytic oxidation of tyrosine by tyrosinase, and deposited on the surface of UCNPs, and then quenched the fluorescence of UCNPs. Under the optimized conditions, the fluorescence quenching of UCNPs showed a good linear response to tyrosine concentration in the range of 0.8-100 μΜ with a detection limit of 1.1 μΜ. Meanwhile, it showed good sensitivity, stability and has been successfully applied to the detection of tyrosine in human serum.
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Affiliation(s)
- Qiongqiong Wu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Aijin Fang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Haitao Li
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Youyu Zhang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China.
| | - Shouzhuo Yao
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
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Xu S, Chen YH, Tan ZX, Xie DD, Zhang C, Xia MZ, Wang H, Zhao H, Xu DX, Yu DX. Vitamin D3 pretreatment alleviates renal oxidative stress in lipopolysaccharide-induced acute kidney injury. J Steroid Biochem Mol Biol 2015; 152:133-41. [PMID: 26013770 DOI: 10.1016/j.jsbmb.2015.05.009] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Revised: 05/18/2015] [Accepted: 05/19/2015] [Indexed: 12/14/2022]
Abstract
Increasing evidence demonstrates that reactive oxygen species plays important roles in sepsis-induced acute kidney injury. This study investigated the effects of VitD3 pretreatment on renal oxidative stress in sepsis-induced acute kidney injury. Mice were intraperitoneally injected with lipopolysaccharide (LPS, 2.0mg/kg) to establish an animal model of sepsis-induced acute kidney injury. In VitD3+LPS group, mice were orally pretreated with three doses of VitD3 (25 μg/kg) at 1, 24 and 48 h before LPS injection. As expected, oral pretreatment with three daily recommended doses of VitD3 markedly elevated serum 25(OH)D concentration and efficiently activated renal VDR signaling. Interestingly, LPS-induced renal GSH depletion and lipid peroxidation were markedly alleviated in VitD3-pretreated mice. LPS-induced serum and renal nitric oxide (NO) production was obviously suppressed by VitD3 pretreatment. In addition, LPS-induced renal protein nitration, as determined by 3-nitrotyrosine residue, was obviously attenuated by VitD3 pretreatment. Further analysis showed that LPS-induced up-regulation of renal inducible nitric oxide synthase (inos) was repressed in VitD3-pretreated mice. LPS-induced up-regulation of renal p47phox and gp91phox, two NADPH oxidase subunits, were normalized by VitD3 pretreatment. In addition, LPS-induced down-regulation of renal superoxide dismutase (sod) 1 and sod2, two antioxidant enzyme genes, was reversed in VitD3-pretreated mice. Finally, LPS-induced tubular epithelial cell apoptosis, as determined by TUNEL, was alleviated by VitD3 pretreatment. Taken together, these results suggest that VitD3 pretreatment alleviates LPS-induced renal oxidative stress through regulating oxidant and antioxidant enzyme genes.
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Affiliation(s)
- Shen Xu
- The Second Affiliated Hospital, Anhui Medical University, Hefei, China
| | - Yuan-Hua Chen
- Department of Toxicology, Anhui Medical University, Hefei, China; Department of Histology and Embryology, Anhui Medical University, Hefei, China
| | - Zhu-Xia Tan
- The Second Affiliated Hospital, Anhui Medical University, Hefei, China
| | - Dong-Dong Xie
- The Second Affiliated Hospital, Anhui Medical University, Hefei, China
| | - Cheng Zhang
- Department of Toxicology, Anhui Medical University, Hefei, China
| | - Mi-Zhen Xia
- School of Life Science, Anhui Medical University, Hefei, China
| | - Hua Wang
- Department of Toxicology, Anhui Medical University, Hefei, China
| | - Hui Zhao
- The Second Affiliated Hospital, Anhui Medical University, Hefei, China
| | - De-Xiang Xu
- Department of Toxicology, Anhui Medical University, Hefei, China.
| | - De-Xin Yu
- The Second Affiliated Hospital, Anhui Medical University, Hefei, China.
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38
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PEELUKHANA SV, GOENKA S, KIM B, KIM J, BHATTACHARYA A, STRINGER KF, BANERJEE RK. Effect of higher frequency components and duration of vibration on bone tissue alterations in the rat-tail model. Ind Health 2015; 53:245-259. [PMID: 25843564 PMCID: PMC4466877 DOI: 10.2486/indhealth.2014-0117] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Accepted: 01/29/2015] [Indexed: 06/04/2023]
Abstract
To formulate more accurate guidelines for musculoskeletal disorders (MSD) linked to Hand-Arm Vibration Syndrome (HAVS), delineation of the response of bone tissue under different frequencies and duration of vibration needs elucidation. Rat-tails were vibrated at 125 Hz (9 rats) and 250 Hz (9 rats), at 49 m/s(2), for 1D (6 rats), 5D (6 rats) and 20D (6 rats); D=days (4 h/d). Rats in the control group (6 rats for the vibration groups; 2 each for 1D, 5D, and 20D) were left in their cages, without being subjected to any vibration. Structural and biochemical damages were quantified using empty lacunae count and nitrotyrosine signal-intensity, respectively. One-way repeated-measure mixed-model ANOVA at p<0.05 level of significance was used for analysis. In the cortical bone, structural damage quantified through empty lacunae count was significant (p<0.05) at 250 Hz (10.82 ± 0.66) in comparison to the control group (7.41 ± 0.76). The biochemical damage was significant (p<0.05) at both the 125 Hz and 250 Hz vibration frequencies. The structural damage was significant (p<0.05) at 5D for cortical bone while the trabecular bone showed significant (p<0.05) damage at 20D time point. Further, the biochemical damage increased with increase in the duration of vibration with a significant (p<0.05) damage observed at 20D time point and a near significant change (p=0.08) observed at 5D time point. Structural and biochemical changes in bone tissue are dependent upon higher vibration frequencies of 125 Hz, 250 Hz and the duration of vibration (5D, 20D).
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Affiliation(s)
| | - Shilpi GOENKA
- Department of Mechanical and Materials Engineering,
University of Cincinnati, USA
| | - Brian KIM
- Department of Mechanical and Materials Engineering,
University of Cincinnati, USA
| | - Jay KIM
- Department of Mechanical and Materials Engineering,
University of Cincinnati, USA
| | | | - Keith F. STRINGER
- Department of Pathology, Cincinnati Children’s Hospital
Medical Centre, USA
| | - Rupak K. BANERJEE
- Department of Mechanical and Materials Engineering,
University of Cincinnati, USA
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Dalio MB, Tirapelli LF, Viaro F, Joviliano EE, Celotto AC, Capellini VK, Evora PR. Morphological, immunohistochemical and biochemical effects of non-pulsatile ex vivo perfusion with crescent pressures in human saphenous veins. J Cardiovasc Surg (Torino) 2015; 56:97-105. [PMID: 22669092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
AIM On the average, 15% to 25% of peripheral grafts and 10% to 30% of coronary grafts fail within 5 years. Changes in mechanical forces to which the vein is subjected could be an explanation for this phenomenon. We submitted human saphenous vein segments to non-pulsatile ex vivo perfusion with crescent pressures and evaluated morphology, nitric oxide synthase immunohistochemical expression; tissue levels of nitrite/nitrate and oxidative stress products. METHODS Intact segments of human saphenous veins were obtained from 30 patients submitted to elective coronary artery bypass graft surgery. Ex vivo perfusion was performed during 3 hours, using oxygenated Krebs solution, flow of 100 mL/min and pressures of 0, 50, 100, 200 and 300 mmHg, defining five groups. RESULTS Optical microscopy showed that veins of groups perfused with 200 and 300 mmHg presented increased luminal area and endothelial denuding. Electron microscopy transmission showed alterations in veins perfused with 200 and 300 mmHg. Immunohistochemical expression of the three nitric oxide synthase isoforms was observed in all vein layers, without significant difference among groups. Tissue levels of nitrite/nitrate were not significantly different among distinctive perfusion. Nitrotyrosine was not immunohistochemically expressed in all veins and malondialdehyde tissue levels were not different among groups. CONCLUSION Non-pulsatile ex vivo perfusion during 3h caused morphological alterations in human saphenous veins (HSVs), which were not accompanied by immunohistochemical and biochemical alterations. Even with mechanical lesions, HSVs maintained the ability of express nitric oxide synthase (NOS) and release nitric oxide.
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Affiliation(s)
- M B Dalio
- Laboratory of Endothelial Function, Department of Surgery and Anatomy, Ribeirão Preto Medical School, São Paulo University, Ribeirão Preto/São Paulo, Brazil -
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Lesslie M, Osburn S, van Stipdonk MJ, Ryzhov V. Gas-phase tyrosine-to-cysteine radical migration in model systems. Eur J Mass Spectrom (Chichester) 2015; 21:589-597. [PMID: 26307738 DOI: 10.1255/ejms.1341] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Radical migration, both intramolecular and intermolecular, from the tyrosine phenoxyl radical Tyr(O(∙)) to the cysteine radical Cys(S(∙)) in model peptide systems was observed in the gas phase. Ion-molecule reactions (IMRs) between the radical cation of homotyrosine and propyl thiol resulted in a fast hydrogen atom transfer. In addition, radical cations of the peptide LysTyrCys were formed via two different methods, affording regiospecific production of Tyr(O(∙)) or Cys(S(∙)) radicals. Collision-induced dissociation of these isomeric species displayed evidence of radical migration from the oxygen to sulfur, but not for the reverse process. This was supported by theoretical calculations, which showed the Cys(S(∙)) radical slightly lower in energy than the Tyr(O(∙)) isomer. IMRs of the LysTyrCys radical cation with allyl iodide further confirmed these findings. A mechanism for radical migration involving a proton shuttle by the C-terminal carboxylic group is proposed.
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Affiliation(s)
- Michael Lesslie
- Department of Chemistry and Biochemistry, and Center for Biochemical and Biophysical Sciences, Northern Illinois University, DeKalb, Illinois 60115, USA.
| | - Sandra Osburn
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania15282, USA.
| | - Michael J van Stipdonk
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, USA.
| | - Victor Ryzhov
- Department of Chemistry and Biochemistry, and Center for Biochemical and Biophysical Sciences, Northern Illinois University, DeKalb, Illinois 60115, USA.
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Wang Z, Cao J, Meng F. Interactions between protein-like and humic-like components in dissolved organic matter revealed by fluorescence quenching. Water Res 2015; 68:404-413. [PMID: 25462747 DOI: 10.1016/j.watres.2014.10.024] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Revised: 10/08/2014] [Accepted: 10/09/2014] [Indexed: 06/04/2023]
Abstract
Numerous reports have documented the interactions of fluorescent dissolved organic matter (FDOM) with other compounds such as metals and trace contaminants by characterizing the fluorescence quenching of the FDOM components. As FDOM is composed of numerous components, inter-component interactions can potentially take place. This study investigated the interactions between protein-like and humic-like components in FDOM using titration experiments and end-member mixing tests. We found that the co-occurrence of protein-like and humic-like components in FDOM samples resulted in an overlap behavior between their fluorescence peaks related to inter-component interactions. Our results suggest that the fluorescence of the protein-like components could be greatly quenched by the humic-like components in the FDOM samples, e.g., the humic-like components from Suwannee River and Nordic Reservoir FDOM yielded significant quenching effect for tyrosine (52% and 46%, respectively) and tryptophan (35% and 36%, respectively) in the titration experiments. The fluorescence of the humic-like components, however, was not impacted by the protein-like components. With the help of complexation modeling, we found that the binding capability between protein-like and humic-like components was dependent on their sources. This study could enhance our current knowledge on the role of FDOM in water and it is also important to the monitoring of FDOM by fluorescence spectroscopy.
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Affiliation(s)
- Zhigang Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
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Krieger JR, Taylor P, Moran MF, McGlade CJ. Comprehensive identification of phosphorylation sites on the Numb endocytic adaptor protein. Proteomics 2015; 15:434-46. [PMID: 25403733 DOI: 10.1002/pmic.201400232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 09/28/2014] [Accepted: 11/11/2014] [Indexed: 11/08/2022]
Abstract
Numb is an adaptor protein that functions in the endocytosis and intracellular trafficking of membrane receptors and adhesion molecules. Previous studies have indicated that Numb localization and function are regulated through phosphorylation by atypical protein kinase C at several key sites. Here, using LC-MS/MS, we report the identification of 25 serine/threonine Numb phosphorylation sites, and a single tyrosine phosphorylation site. Amino acid sequences flanking several of the sites identified conform to consensus motifs for cyclin-dependent kinase 5 (CDK5). In vitro kinase assays and immunoblotting confirmed that CDK5 phosphorylates Numb. LC-MS/MS analysis identified specific CDK5-directed phosphorylation of Numb at position S288 and at two additional regions. Therefore, Numb is likely to exist in multiple phospho-isoforms, and may be subject to phosphorylation-mediated regulation downstream of CDK5. These findings provide a basis for further investigations into the complex role of Numb phosphorylation in regulating its subcellular localization, protein interactions, and function. All MS data have been deposited in the ProteomeXchange with identifier PXD000997 (http://proteomecentral.proteomexchange.org/dataset/PXD000997).
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Affiliation(s)
- Jonathan R Krieger
- Program in Cell Biology, The Hospital For Sick Children, Toronto, ON, Canada; Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada; The Arthur and Sonia Labatt Brain Tumour Research Center, The Hospital for Sick Children, Toronto, ON, Canada
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Yan Y, Zeng MM, Zheng ZP, He ZY, Tao GJ, Zhang S, Gao YH, Chen J. Simultaneous analysis of PhIP, 4'-OH-PhIP, and their precursors using UHPLC-MS/MS. J Agric Food Chem 2014; 62:11628-11636. [PMID: 25407701 DOI: 10.1021/jf503776e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A novel method allowing simultaneous analysis of PhIP, 4'-OH-PhIP, and their precursors (phenylalanine, tyrosine, creatine, creatinine, glucose) has been developed as a robust kinetic study tool by using ultra high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). A direct hydrochloric acid (HCl) extraction was applied to achieve the simultaneous extraction of all seven analytes, with the mean recoveries ranging from 60% to 120% at two concentration levels. Then, an Atlantis dC18 column selected from four different chromatographic columns was ultimately used to separate these compounds within 15 min. The limits of detection range of allseven analytes were calculated as 0.14-325.00 μg L(-1). The intra- and interday precision of the proposed method were less than 15.4 and 19.9%, respectively. The proposed method was successfully applied to depict the kinetic profiles of PhIP, 4'-OH-PhIP, and their precursors in pork model, reducing the analysis time and cost in the kinetic study.
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Affiliation(s)
- Yan Yan
- Key Laboratory of Food Science and Technology, Jiangnan University , Wuxi 214122, People's Republic of China
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45
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Ohshiro T, Tsutsui M, Yokota K, Furuhashi M, Taniguchi M, Kawai T. Detection of post-translational modifications in single peptides using electron tunnelling currents. Nat Nanotechnol 2014; 9:835-40. [PMID: 25218325 DOI: 10.1038/nnano.2014.193] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 08/08/2014] [Indexed: 05/26/2023]
Abstract
Post-translational modifications alter the properties of proteins through the cleavage of peptide bonds or the addition of a modifying group to one or more amino acids. These modifications allow proteins to perform their primary biological functions, but single-protein studies of post-translational modifications have been hindered by a lack of suitable analysis methods. Here, we show that single amino acids can be identified using electron tunnelling currents measured as the individual molecules pass through a nanoscale gap between electrodes. We identify 12 different amino acids and the post-translational modification phosphotyrosine, which is involved in the process that switches enzymes on and off. Furthermore, we show that the conductance measurements can be used to partially sequence peptides of an epidermal growth factor receptor substrate, and can discriminate a peptide from its phosphorylated variant.
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Affiliation(s)
- Takahito Ohshiro
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Makusu Tsutsui
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Kazumichi Yokota
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Masayuki Furuhashi
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Tomoji Kawai
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Cipri A, Del Valle M. Pd nanoparticles/multiwalled carbon nanotubes electrode system for voltammetric sensing of tyrosine. J Nanosci Nanotechnol 2014; 14:6692-8. [PMID: 25924318 DOI: 10.1166/jnn.2014.9370] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A facile and quick synthesis of palladium decorated multi-walled carbon nanotubes is presented in this work. The developed protocol allowed a quasi-homogeneous distribution of the metal nanoparticles on the surface of the nanotubes, and a controlled size of the nanoparticles in a range between 3.5 and 4.5 nm. After the characterization of the hybrid nanocomposite a first attempt on a possible application was made. The preliminary test, an ink-like nanocomposite as a modifier on the surface of a carbon screen-printed electrode, was performed in order to detect L-Tyrosine. Preliminary results are promising. A catalytic effect on the oxidation peak of the L-Tyrosine was shown and furthermore a low limit of detection, 1.46 x 10(-10) M, was reached.
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47
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Kaffe ET, Rigopoulou EI, Koukoulis GK, Dalekos GN, Moulas AN. Oxidative stress and antioxidant status in patients with autoimmune liver diseases. Redox Rep 2014; 20:33-41. [PMID: 25117650 DOI: 10.1179/1351000214y.0000000101] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVE To estimate oxidative stress and antioxidant components during different stages of autoimmune liver diseases and assess their possible implication on disease progression. METHODS We determined several markers of oxidative injury (isoprostane, aldehydes, protein carbonyls, 3-nitrotyrosine, and myeloperoxidase) and antioxidant components (glutathione, glutathione peroxidase, glutathione reductase, superoxide dismutase, and catalase) in whole blood, serum, and urine in 49 patients with autoimmune cholestatic liver diseases (AC) and 36 patients with autoimmune hepatitis (AIH) and healthy subjects matched for sex and age. RESULTS Both AC and AIH patients had increased levels of all lipid and protein oxidative injury products and significantly decreased whole blood glutathione levels compared to controls. AIH patients had significantly higher levels of aldehydes and glutathione peroxidase activity and significantly lower protein carbonyl levels compared to AC patients. Protein carbonyl and isoprostane levels increased and glutathione levels decreased gradually with progression from mild fibrosis to severe fibrosis and cirrhosis in both AC and AIH patients. In addition, both cirrhotic AC and AIH patients had significantly higher protein carbonyls compared to non-cirrhotics. DISCUSSION We provide novel findings in support of a major contribution of oxidant/antioxidant imbalance in the progression of liver injury in AC and AIH.
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Rizzi E, Guimaraes DA, Ceron CS, Prado CM, Pinheiro LC, Martins-Oliveira A, Gerlach RF, Tanus-Santos JE. β1-Adrenergic blockers exert antioxidant effects, reduce matrix metalloproteinase activity, and improve renovascular hypertension-induced cardiac hypertrophy. Free Radic Biol Med 2014; 73:308-17. [PMID: 24933619 DOI: 10.1016/j.freeradbiomed.2014.05.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 05/28/2014] [Accepted: 05/29/2014] [Indexed: 01/13/2023]
Abstract
Hypertension induces left-ventricular hypertrophy (LVH) by mechanisms involving oxidative stress and unbalanced cardiac matrix metalloproteinase (MMP) activity. We hypothesized that β1-adrenergic receptor blockers with antioxidant properties (nebivolol) could reverse hypertension-induced LVH more effectively than conventional β1-blockers (metoprolol) when used at doses that exert similar antihypertensive effects. Two-kidney one-clip (2K1C) hypertension was induced in male Wistar rats. Six weeks after surgery, hypertensive and sham rats were treated with nebivolol (10 mg kg(-1)day(-1)) or metoprolol (20 mg kg(-1)day(-1)) for 4 weeks. Systolic blood pressure was monitored weekly by tail-cuff plethysmography. LV structural changes and fibrosis were studied in hematoxylin/eosin- and picrosirius-stained sections, respectively. Cardiac MMP levels and activity were determined by in situ zymography, gel zymography, and immunofluorescence. Dihydroethidium and lucigenin-derived chemiluminescence assays were used to assess cardiac reactive oxygen species (ROS) production. Nitrotyrosine levels were determined in LV samples by immunohistochemistry and green fluorescence and were evaluated using the ImageJ software. Cardiac protein kinase B/Akt (AKT) phosphorylation state was assessed by Western blot. Both β-blockers exerted similar antihypertensive effects and attenuated hypertension-induced cardiac remodeling. Both drugs reduced myocyte hypertrophy and collagen deposition in 2K1C rats. These effects were associated with lower cardiac ROS and nitrotyrosine levels and attenuation of hypertension-induced increases in cardiac MMP-2 levels and in situ gelatinolytic activity after treatment with both β-blockers. Whereas hypertension increased AKT phosphorylation, no effects were found with β-blockers. In conclusion, we found evidence that two β1-blockers with different properties attenuate hypertension-induced LV hypertrophy and cardiac collagen deposition in association with significant cardiac antioxidant effects and MMP-2 downregulation, thus suggesting a critical role for β1-adrenergic receptors in mediating those effects. Nebivolol is not superior to metoprolol, at least with respect to their capacity to reverse hypertension-induced LVH.
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Affiliation(s)
- Elen Rizzi
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Danielle A Guimaraes
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Carla S Ceron
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Cibele M Prado
- Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900 Ribeirao Preto, SP, Brazil
| | - Lucas C Pinheiro
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Alisson Martins-Oliveira
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Raquel F Gerlach
- Department of Morphology, Estomatology, and Physiology, Ribeirao Preto Dental School, University of Sao Paulo, 14049-900 Ribeirao Preto, SP, Brazil
| | - Jose E Tanus-Santos
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil.
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Robinson MR, Moore KL, Brodbelt JS. Direct identification of tyrosine sulfation by using ultraviolet photodissociation mass spectrometry. J Am Soc Mass Spectrom 2014; 25:1461-71. [PMID: 24845354 PMCID: PMC4108549 DOI: 10.1007/s13361-014-0910-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 03/30/2014] [Accepted: 04/05/2014] [Indexed: 05/25/2023]
Abstract
Sulfation is a common post-translational modification of tyrosine residues in eukaryotes; however, detection using traditional liquid chromatography-mass spectrometry (LC-MS) methods is challenging based on poor ionization efficiency in the positive ion mode and facile neutral loss upon collisional activation. In the present study, 193 nm ultraviolet photodissociation (UVPD) is applied to sulfopeptide anions to generate diagnostic sequence ions, which do not undergo appreciable neutral loss of sulfate even using higher energy photoirradiation parameters. At the same time, neutral loss of SO₃ is observed from the precursor and charge-reduced precursor ions, a spectral feature that is useful for differentiating tyrosine sulfation from the nominally isobaric tyrosine phosphorylation. LC-MS detection limits for UVPD analysis in the negative mode were determined to be around 100 fmol for three sulfated peptides, caerulein, cionin, and leu-enkephalin. The LC-UVPD-MS method was applied for analysis of bovine fibrinogen, and its key sulfated peptide was confidently identified.
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Affiliation(s)
- Michelle R Robinson
- Department of Chemistry, The University of Texas at Austin, 1 University Station A5300, Austin, TX, 78712, USA
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50
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Tsikas D, Duncan MW. Mass spectrometry and 3-nitrotyrosine: strategies, controversies, and our current perspective. Mass Spectrom Rev 2014; 33:237-76. [PMID: 24167057 DOI: 10.1002/mas.21396] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 06/24/2013] [Accepted: 06/24/2013] [Indexed: 05/11/2023]
Abstract
Reactive-nitrogen species (RNS) such as peroxynitrite (ONOO(-)), that is, the reaction product of nitric oxide ((•)NO) and superoxide (O2(-•)), nitryl chloride (NO2Cl) and (•)NO2 react with the activated aromatic ring of tyrosine to form 3-nitrotyrosine. This modification, which has been known for more than a century, occurs to both the free form of the amino acid (i.e., soluble/free tyrosine) and to tyrosine residues covalently bound within the backbone of peptides and proteins. Nitration of tyrosine is thought to be of biological significance and has been linked to health and disease, but determining its role has proved challenging. Several key questions have been the focus of much of the research activity: (a) to what extent is free/soluble tyrosine nitrated in biological tissues and fluids, and (b) are there specific site(s) of nitration within peptides/proteins and to what extent (i.e., stoichiometry) does this modification occur? These issues have been addressed in a wide range of sample types (e.g., blood, urine, CSF, exhaled breath condensate and various tissues) and a diverse array of physiological/pathophysiological scenarios. The accurate determination of nitrated tyrosine is, however, a stumbling block. Despite extensive study, the extent to which nitration occurs in vivo, the specificity of the nitration reaction, and its importance in health and disease, remain unclear. In this review, we highlight the analytical challenges and discuss the approaches adopted to address them. Mass spectrometry, in combination with either gas chromatography (GC-MS, GC-MS/MS) or liquid chromatography (LC-MS/MS), has played the central role in the analysis of 3-nitrotyrosine and tyrosine-nitrated biological macromolecules. We discuss its unique attributes and highlight the role of stable-isotope labeled 3-nitrotyrosine analogs in both accurate quantification, and in helping to define the biological relevance of tyrosine nitration. We show that the application of sophisticated mass spectrometric techniques is advantageous if not essential, but that this alone is by no means a guarantee of accurate findings. We discuss the important analytical challenges in quantifying 3-nitrotyrosine, possible workarounds, and we attempt to make sense of the disparate findings that have been reported so far.
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Affiliation(s)
- Dimitrios Tsikas
- Institute of Clinical Pharmacology, Hannover Medical School, Hannover, Germany
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