1
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Liu Z, Smith SR. Cross-Linked Enzyme Aggregate (CLEA) Preparation from Waste Activated Sludge. Microorganisms 2023; 11:1902. [PMID: 37630462 PMCID: PMC10458447 DOI: 10.3390/microorganisms11081902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 08/27/2023] Open
Abstract
Enzymes are used extensively as industrial bio-catalysts in various manufacturing and processing sectors. However, commercial enzymes are expensive in part due to the high cost of the nutrient medium for the biomass culture. Activated sludge (AS) is a waste product of biological wastewater treatment and consists of microbial biomass that degrades organic matter by producing substantial quantities of hydrolytic enzymes. Recovering enzymes from AS therefore offers a potential alternative to conventional production techniques. A carrier-free, cross-linked enzyme aggregate (CLEA) was produced from crude AS enzyme extract for the first time. A major advantage of the CLEA is the combined immobilization, purification, and stabilization of the crude enzymes into a single step, thereby avoiding large amounts of inert carriers in the final enzyme product. The AS CLEA contained a variety of hydrolytic enzymes and demonstrated high potential for the bio-conversion of complex organic substrates.
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Affiliation(s)
| | - Stephen R. Smith
- Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
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2
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Santolla MF, Talia M, Cirillo F, Scordamaglia D, De Rosis S, Spinelli A, Miglietta AM, Nardo B, Filippelli G, De Francesco EM, Belfiore A, Lappano R, Maggiolini M. The AGEs/RAGE Transduction Signaling Prompts IL-8/CXCR1/2-Mediated Interaction between Cancer-Associated Fibroblasts (CAFs) and Breast Cancer Cells. Cells 2022; 11:2402. [PMID: 35954247 PMCID: PMC9368521 DOI: 10.3390/cells11152402] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 07/29/2022] [Accepted: 08/02/2022] [Indexed: 01/27/2023] Open
Abstract
Advanced glycation end products (AGEs) and the cognate receptor, named RAGE, are involved in metabolic disorders characterized by hyperglycemia, type 2 diabetes mellitus (T2DM) and obesity. Moreover, the AGEs/RAGE transduction pathway prompts a dysfunctional interaction between breast cancer cells and tumor stroma toward the acquisition of malignant features. However, the action of the AGEs/RAGE axis in the main players of the tumor microenvironment, named breast cancer-associated fibroblasts (CAFs), remains to be fully explored. In the present study, by chemokine array, we first assessed that interleukin-8 (IL-8) is the most up-regulated pro-inflammatory chemokine upon AGEs/RAGE activation in primary CAFs, obtained from breast tumors. Thereafter, we ascertained that the AGEs/RAGE signaling promotes a network cascade in CAFs, leading to the c-Fos-dependent regulation of IL-8. Next, using a conditioned medium from AGEs-exposed CAFs, we determined that IL-8/CXCR1/2 paracrine activation induces the acquisition of migratory and invasive features in MDA-MB-231 breast cancer cells. Altogether, our data provide new insights on the involvement of IL-8 in the AGEs/RAGE transduction pathway among the intricate connections linking breast cancer cells to the surrounding stroma. Hence, our findings may pave the way for further investigations to define the role of IL-8 as useful target for the better management of breast cancer patients exhibiting metabolic disorders.
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Affiliation(s)
- Maria Francesca Santolla
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
| | - Marianna Talia
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
| | - Francesca Cirillo
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
| | - Domenica Scordamaglia
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
| | - Salvatore De Rosis
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
| | - Asia Spinelli
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
| | - Anna Maria Miglietta
- Breast and General Surgery Unit, Regional Hospital Cosenza, 87100 Cosenza, Italy
| | - Bruno Nardo
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
- Breast and General Surgery Unit, Regional Hospital Cosenza, 87100 Cosenza, Italy
| | | | - Ernestina Marianna De Francesco
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Hospital, 95122 Catania, Italy
| | - Antonino Belfiore
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Hospital, 95122 Catania, Italy
| | - Rosamaria Lappano
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
| | - Marcello Maggiolini
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
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3
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Applications of Tandem Mass Spectrometry (MS/MS) in Protein Analysis for Biomedical Research. Molecules 2022; 27:molecules27082411. [PMID: 35458608 PMCID: PMC9031286 DOI: 10.3390/molecules27082411] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/05/2022] [Accepted: 04/06/2022] [Indexed: 01/27/2023] Open
Abstract
Mass Spectrometry (MS) allows the analysis of proteins and peptides through a variety of methods, such as Electrospray Ionization-Mass Spectrometry (ESI-MS) or Matrix-Assisted Laser Desorption Ionization-Mass Spectrometry (MALDI-MS). These methods allow identification of the mass of a protein or a peptide as intact molecules or the identification of a protein through peptide-mass fingerprinting generated upon enzymatic digestion. Tandem mass spectrometry (MS/MS) allows the fragmentation of proteins and peptides to determine the amino acid sequence of proteins (top-down and middle-down proteomics) and peptides (bottom-up proteomics). Furthermore, tandem mass spectrometry also allows the identification of post-translational modifications (PTMs) of proteins and peptides. Here, we discuss the application of MS/MS in biomedical research, indicating specific examples for the identification of proteins or peptides and their PTMs as relevant biomarkers for diagnostic and therapy.
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4
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O'Neill AM, Worthing KA, Kulkarni N, Li F, Nakatsuji T, McGrosso D, Mills RH, Kalla G, Cheng JY, Norris JM, Pogliano K, Pogliano J, Gonzalez DJ, Gallo RL. Antimicrobials from a feline commensal bacterium inhibit skin infection by drug-resistant S. pseudintermedius. eLife 2021; 10:66793. [PMID: 34664551 PMCID: PMC8592530 DOI: 10.7554/elife.66793] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 10/02/2021] [Indexed: 12/13/2022] Open
Abstract
Methicillin-resistant Staphylococcus pseudintermedius (MRSP) is an important emerging zoonotic pathogen that causes severe skin infections. To combat infections from drug-resistant bacteria, the transplantation of commensal antimicrobial bacteria as a therapeutic has shown clinical promise. We screened a collection of diverse staphylococcus species from domestic dogs and cats for antimicrobial activity against MRSP. A unique strain (S. felis C4) was isolated from feline skin that inhibited MRSP and multiple gram-positive pathogens. Whole genome sequencing and mass spectrometry revealed several secreted antimicrobials including a thiopeptide bacteriocin micrococcin P1 and phenol-soluble modulin beta (PSMβ) peptides that exhibited antimicrobial and anti-inflammatory activity. Fluorescence and electron microscopy revealed that S. felis antimicrobials inhibited translation and disrupted bacterial but not eukaryotic cell membranes. Competition experiments in mice showed that S. felis significantly reduced MRSP skin colonization and an antimicrobial extract from S. felis significantly reduced necrotic skin injury from MRSP infection. These findings indicate a feline commensal bacterium that could be utilized in bacteriotherapy against difficult-to-treat animal and human skin infections.
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Affiliation(s)
- Alan M O'Neill
- Department of Dermatology, University of California, San Diego, San Diego, United States
| | - Kate A Worthing
- College of Veterinary Medicine, University of Arizona, Oro Valley, United States
| | - Nikhil Kulkarni
- Department of Dermatology, University of California, San Diego, San Diego, United States
| | - Fengwu Li
- Department of Dermatology, University of California, San Diego, San Diego, United States
| | - Teruaki Nakatsuji
- Department of Dermatology, University of California, San Diego, San Diego, United States
| | - Dominic McGrosso
- Department of Pharmacology, University of California, San Diego, San Diego, United States.,Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, San Diego, United States
| | - Robert H Mills
- Department of Pharmacology, University of California, San Diego, San Diego, United States.,Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, San Diego, United States
| | - Gayathri Kalla
- Division of Biological Sciences, University of California, San Diego, San Diego, United States
| | - Joyce Y Cheng
- Department of Dermatology, University of California, San Diego, San Diego, United States
| | - Jacqueline M Norris
- Sydney School of Veterinary Science, University of Sydney, Sydney, Australia
| | - Kit Pogliano
- Division of Biological Sciences, University of California, San Diego, San Diego, United States
| | - Joe Pogliano
- Division of Biological Sciences, University of California, San Diego, San Diego, United States
| | - David J Gonzalez
- Department of Pharmacology, University of California, San Diego, San Diego, United States.,Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, San Diego, United States
| | - Richard L Gallo
- Department of Dermatology, University of California, San Diego, San Diego, United States
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5
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Zhang J, Pinello JF, Fernández I, Baquero E, Fedry J, Rey FA, Snell WJ. Species-specific gamete recognition initiates fusion-driving trimer formation by conserved fusogen HAP2. Nat Commun 2021; 12:4380. [PMID: 34282138 PMCID: PMC8289870 DOI: 10.1038/s41467-021-24613-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 06/15/2021] [Indexed: 12/02/2022] Open
Abstract
Recognition and fusion between gametes during fertilization is an ancient process. Protein HAP2, recognized as the primordial eukaryotic gamete fusogen, is a structural homolog of viral class II fusion proteins. The mechanisms that regulate HAP2 function, and whether virus-fusion-like conformational changes are involved, however, have not been investigated. We report here that fusion between plus and minus gametes of the green alga Chlamydomonas indeed requires an obligate conformational rearrangement of HAP2 on minus gametes from a labile, prefusion form into the stable homotrimers observed in structural studies. Activation of HAP2 to undergo its fusogenic conformational change occurs only upon species-specific adhesion between the two gamete membranes. Following a molecular mechanism akin to fusion of enveloped viruses, the membrane insertion capacity of the fusion loop is required to couple formation of trimers to gamete fusion. Thus, species-specific membrane attachment is the gateway to fusion-driving HAP2 rearrangement into stable trimers. HAP2 is essential for gamete fusion during fertilization and is conserved among eukaryotes. Here the authors show that species-specific adhesion between Chlamydomonas plus and minus gametes initiates HAP2 to undergo a fusogenic conformational change into homotrimers via a molecular mechanism akin to that of enveloped viruses.
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Affiliation(s)
- Jun Zhang
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, USA
| | - Jennifer F Pinello
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, USA
| | - Ignacio Fernández
- Unité de Virologie Structurale, Virology Department and CNRS UMR 3569, Institut Pasteur, Paris, France
| | - Eduard Baquero
- Unité de Virologie Structurale, Virology Department and CNRS UMR 3569, Institut Pasteur, Paris, France
| | - Juliette Fedry
- Unité de Virologie Structurale, Virology Department and CNRS UMR 3569, Institut Pasteur, Paris, France
| | - Félix A Rey
- Unité de Virologie Structurale, Virology Department and CNRS UMR 3569, Institut Pasteur, Paris, France
| | - William J Snell
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, USA.
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6
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Santolla MF, Talia M, Maggiolini M. S100A4 Is Involved in Stimulatory Effects Elicited by the FGF2/FGFR1 Signaling Pathway in Triple-Negative Breast Cancer (TNBC) Cells. Int J Mol Sci 2021; 22:ijms22094720. [PMID: 33946884 PMCID: PMC8124532 DOI: 10.3390/ijms22094720] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/23/2021] [Accepted: 04/27/2021] [Indexed: 12/11/2022] Open
Abstract
Triple-negative breast cancer (TNBC) is an aggressive breast tumor subtype characterized by poor clinical outcome. In recent years, numerous advancements have been made to better understand the biological landscape of TNBC, though appropriate targets still remain to be determined. In the present study, we have determined that the expression levels of FGF2 and S100A4 are higher in TNBC with respect to non-TNBC patients when analyzing “The Invasive Breast Cancer Cohort of The Cancer Genome Atlas” (TCGA) dataset. In addition, we have found that the gene expression of FGF2 is positively correlated with S100A4 in TNBC samples. Performing quantitative PCR, Western blot, CRISPR/Cas9 genome editing, promoter studies, immunofluorescence analysis, subcellular fractionation studies, and ChIP assays, we have also demonstrated that FGF2 induces in TNBC cells the upregulation and secretion of S100A4 via FGFR1, along with the ERK1/2–AKT–c-Rel transduction signaling. Using conditioned medium from TNBC cells stimulated with FGF2, we have also ascertained that the paracrine activation of the S100A4/RAGE pathway triggers angiogenic effects in vascular endothelial cells (HUVECs) and promotes the migration of cancer-associated fibroblasts (CAFs). Collectively, our data provide novel insights into the action of the FGF2/FGFR1 axis through S100A4 toward stimulatory effects elicited in TNBC cells.
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MESH Headings
- Antigens, Neoplasm/physiology
- Cell Movement/drug effects
- Culture Media, Conditioned/pharmacology
- Female
- Fibroblast Growth Factor 2/pharmacology
- Fibroblast Growth Factor 2/physiology
- Fibroblasts/pathology
- Gene Expression Regulation, Neoplastic/physiology
- Human Umbilical Vein Endothelial Cells
- Humans
- Mitogen-Activated Protein Kinases/physiology
- Neoplasm Proteins/physiology
- Neovascularization, Pathologic/physiopathology
- Paracrine Communication
- Protein Kinase Inhibitors/pharmacology
- Proto-Oncogene Proteins c-rel/physiology
- Receptor, Fibroblast Growth Factor, Type 1/antagonists & inhibitors
- Receptor, Fibroblast Growth Factor, Type 1/genetics
- Receptor, Fibroblast Growth Factor, Type 1/physiology
- S100 Calcium-Binding Protein A4/physiology
- Signal Transduction/drug effects
- Signal Transduction/physiology
- Triple Negative Breast Neoplasms/blood supply
- Triple Negative Breast Neoplasms/physiopathology
- Tumor Cells, Cultured
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7
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Alyethodi RR, Karthik S, Muniswamy K, Ravi SK, Perumal P, Bhattacharya D, Bala PA, De AK, Sujatha T, Sunder J, Kundu A. Assessment of Protein Profiles of RNAlater Stored and Fresh PBMC Cells Using Different Protein Extraction Buffers. Protein J 2020; 39:291-300. [DOI: 10.1007/s10930-020-09888-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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8
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Rodríguez A, Guillemyn B, Coucke P, Vaneechoutte M. Nucleic acids enrichment of fungal pathogens to study host-pathogen interactions. Sci Rep 2019; 9:18037. [PMID: 31792282 PMCID: PMC6889467 DOI: 10.1038/s41598-019-54608-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 11/15/2019] [Indexed: 12/11/2022] Open
Abstract
Fungal infections, ranging from superficial to life-threatening infections, represent a major public health problem that affects 25% of the worldwide population. In this context, the study of host-pathogen interactions within the host is crucial to advance antifungal therapy. However, since fungal cells are usually outnumbered by host cells, the fungal transcriptome frequently remains uncovered. We compared three different methods to selectively lyse human cells from in vitro mixes, composed of Candida cells and peripheral blood mononuclear cells. In order to prevent transcriptional modification, the mixes were stored in RNAlater. We evaluated the enrichment of fungal cells through cell counting using microscopy and aimed to further enrich fungal nucleic acids by centrifugation and by reducing contaminant nucleic acids from the host. We verified the enrichment of fungal DNA and RNA through qPCR and RT-qPCR respectively and confirmed that the resulting RNA has high integrity scores, suitable for downstream applications. The enrichment method provided here, i.e., lysis with Buffer RLT followed by centrifugation, may contribute to increase the proportion of nucleic acids from fungi in clinical samples, thus promoting more comprehensive analysis of fungal transcriptional profiles. Although we focused on C. albicans, the enrichment may be applicable to other fungal pathogens.
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Affiliation(s)
- Antonio Rodríguez
- Laboratory Bacteriology Research, Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, 9000, Belgium.
| | - Brecht Guillemyn
- Center for Medical Genetics Ghent, Ghent University Hospital, Department of Biomolecular Medicine, Ghent, 9000, Belgium
| | - Paul Coucke
- Center for Medical Genetics Ghent, Ghent University Hospital, Department of Biomolecular Medicine, Ghent, 9000, Belgium
| | - Mario Vaneechoutte
- Laboratory Bacteriology Research, Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, 9000, Belgium
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9
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Schira-Heinen J, Grube L, Waldera-Lupa DM, Baberg F, Langini M, Etemad-Parishanzadeh O, Poschmann G, Stühler K. Pitfalls and opportunities in the characterization of unconventionally secreted proteins by secretome analysis. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2019; 1867:140237. [DOI: 10.1016/j.bbapap.2019.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 06/04/2019] [Accepted: 06/06/2019] [Indexed: 02/07/2023]
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10
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Niu L, Zhang H, Wu Z, Wang Y, Liu H, Wu X, Wang W. Modified TCA/acetone precipitation of plant proteins for proteomic analysis. PLoS One 2018; 13:e0202238. [PMID: 30557402 PMCID: PMC6296544 DOI: 10.1371/journal.pone.0202238] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 11/29/2018] [Indexed: 01/01/2023] Open
Abstract
Protein extracts obtained from cells or tissues often require removal of interfering substances for the preparation of high-quality protein samples in proteomic analysis. A number of protein extraction methods have been applied to various biological samples. TCA/acetone precipitation and phenol extraction, a common method of protein extraction, is thought to minimize protein degradation and activity of proteases as well as reduce contaminants like salts and polyphenols. However, the TCA/acetone precipitation method relies on the complete pulverization and repeated rinsing of tissue powder to remove the interfering substances, which is laborious and time-consuming. In addition, by prolonged incubation in TCA/acetone, the precipitated proteins are more difficult to re-dissolve. We have described a modified method of TCA/acetone precipitation of plant proteins for proteomic analysis. Proteins of cells or tissues were extracted using SDS-containing buffer, precipitated with equal volume of 20% TCA/acetone, and washed with acetone. Compared to classical TCA/acetone precipitation and simple acetone precipitation, this protocol generates comparable yields, spot numbers, and proteome profiling, but takes less time (ca. 45 min), thus avoiding excess protein modification and degradation after extended-period incubation in TCA/acetone or acetone. The modified TCA/acetone precipitation method is simple, fast, and suitable for proteomic analysis of various plant tissues in proteomic analysis.
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Affiliation(s)
- Liangjie Niu
- State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, College of Life Sciences, Henan Agricultural University, Zhengzhou, China
| | - Hang Zhang
- State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, College of Life Sciences, Henan Agricultural University, Zhengzhou, China
| | - Zhaokun Wu
- State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, College of Life Sciences, Henan Agricultural University, Zhengzhou, China
| | - Yibo Wang
- State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, College of Life Sciences, Henan Agricultural University, Zhengzhou, China
| | - Hui Liu
- State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, College of Life Sciences, Henan Agricultural University, Zhengzhou, China
- * E-mail: (WW); (HL)
| | - Xiaolin Wu
- State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, College of Life Sciences, Henan Agricultural University, Zhengzhou, China
| | - Wei Wang
- State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, College of Life Sciences, Henan Agricultural University, Zhengzhou, China
- * E-mail: (WW); (HL)
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11
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Eddhif B, Lange J, Guignard N, Batonneau Y, Clarhaut J, Papot S, Geffroy-Rodier C, Poinot P. Study of a novel agent for TCA precipitated proteins washing - comprehensive insights into the role of ethanol/HCl on molten globule state by multi-spectroscopic analyses. J Proteomics 2018; 173:77-88. [DOI: 10.1016/j.jprot.2017.11.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/10/2017] [Accepted: 11/21/2017] [Indexed: 12/14/2022]
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12
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Bataille J, Viodé A, Pereiro I, Lafleur JP, Varenne F, Descroix S, Becher F, Kutter JP, Roesch C, Poüs C, Taverna M, Pallandre A, Smadja C, Le Potier I. On-a-chip tryptic digestion of transthyretin: a step toward an integrated microfluidic system for the follow-up of familial transthyretin amyloidosis. Analyst 2018; 143:1077-1086. [DOI: 10.1039/c7an01737e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
TTR digestion on TE-chip: production of a fragment of interest allowing the therapeutic follow-up of the familial transthyretin amyloidosis.
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13
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Zhang Y, Bilbao A, Bruderer T, Luban J, Strambio-De-Castillia C, Lisacek F, Hopfgartner G, Varesio E. The Use of Variable Q1 Isolation Windows Improves Selectivity in LC-SWATH-MS Acquisition. J Proteome Res 2015; 14:4359-71. [PMID: 26302369 DOI: 10.1021/acs.jproteome.5b00543] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
As tryptic peptides and metabolites are not equally distributed along the mass range, the probability of cross fragment ion interference is higher in certain windows when fixed Q1 SWATH windows are applied. We evaluated the benefits of utilizing variable Q1 SWATH windows with regards to selectivity improvement. Variable windows based on equalizing the distribution of either the precursor ion population (PIP) or the total ion current (TIC) within each window were generated by an in-house software, swathTUNER. These two variable Q1 SWATH window strategies outperformed, with respect to quantification and identification, the basic approach using a fixed window width (FIX) for proteomic profiling of human monocyte-derived dendritic cells (MDDCs). Thus, 13.8 and 8.4% additional peptide precursors, which resulted in 13.1 and 10.0% more proteins, were confidently identified by SWATH using the strategy PIP and TIC, respectively, in the MDDC proteomic sample. On the basis of the spectral library purity score, some improvement warranted by variable Q1 windows was also observed, albeit to a lesser extent, in the metabolomic profiling of human urine. We show that the novel concept of "scheduled SWATH" proposed here, which incorporates (i) variable isolation windows and (ii) precursor retention time segmentation further improves both peptide and metabolite identifications.
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Affiliation(s)
- Ying Zhang
- University of Geneva , Life Sciences Mass Spectrometry, School of Pharmaceutical Sciences, Geneva, Switzerland
| | - Aivett Bilbao
- University of Geneva , Life Sciences Mass Spectrometry, School of Pharmaceutical Sciences, Geneva, Switzerland.,SIB Swiss Institute of Bioinformatics , Proteome Informatics Group, Geneva, Switzerland
| | - Tobias Bruderer
- University of Geneva , Life Sciences Mass Spectrometry, School of Pharmaceutical Sciences, Geneva, Switzerland
| | - Jeremy Luban
- University of Massachusetts , Medical School, Program in Molecular Medicine, Worcester, Massachusetts 01605, United States
| | - Caterina Strambio-De-Castillia
- University of Massachusetts , Medical School, Program in Molecular Medicine, Worcester, Massachusetts 01605, United States
| | - Frédérique Lisacek
- SIB Swiss Institute of Bioinformatics , Proteome Informatics Group, Geneva, Switzerland.,University of Geneva , Faculty of Sciences, Geneva, Switzerland
| | - Gérard Hopfgartner
- University of Geneva , Life Sciences Mass Spectrometry, School of Pharmaceutical Sciences, Geneva, Switzerland
| | - Emmanuel Varesio
- University of Geneva , Life Sciences Mass Spectrometry, School of Pharmaceutical Sciences, Geneva, Switzerland
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