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Morosi L, Miotto M, Timo S, Carloni S, Bruno E, Meroni M, Menna E, Lodato S, Rescigno M, Martano G. MSIpixel: a fully automated pipeline for compound annotation and quantitation in mass spectrometry imaging experiments. Brief Bioinform 2023; 25:bbad463. [PMID: 38102070 PMCID: PMC10753532 DOI: 10.1093/bib/bbad463] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 10/13/2023] [Accepted: 11/22/2023] [Indexed: 12/17/2023] Open
Abstract
Mass spectrometry imaging (MSI) is commonly used to map the spatial distribution of small molecules within complex biological matrices. One of the major challenges in imaging MS-based spatial metabolomics is molecular identification and metabolite annotation, to address this limitation, annotation is often complemented with parallel bulk LC-MS2-based metabolomics to confirm and validate identifications. Here we applied MSI method, utilizing data-dependent acquisition, to visualize and identify unknown molecules in a single instrument run. To reach this aim we developed MSIpixel, a fully automated pipeline for compound annotation and quantitation in MSI experiments. It overcomes challenges in molecular identification, and improving reliability and comprehensiveness in MSI-based spatial metabolomics.
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Affiliation(s)
- Lavinia Morosi
- IRCCS Humanitas Research Hospital, Via Manzoni 56, Rozzano (MI), Italy
| | - Matteo Miotto
- IRCCS Humanitas Research Hospital, Via Manzoni 56, Rozzano (MI), Italy
| | - Sara Timo
- IRCCS Humanitas Research Hospital, Via Manzoni 56, Rozzano (MI), Italy
| | - Sara Carloni
- IRCCS Humanitas Research Hospital, Via Manzoni 56, Rozzano (MI), Italy
- Department of Biomedical Sciences, Humanitas University, Via R. Levi Montalcini 4, Pieve Emanuele (MI), Italy
| | - Eleonora Bruno
- Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale dei tumori di Milano. Via Venezian 1, Milan, Italy
| | - Marina Meroni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Oncology, via Mario Negri 2, Milan, Italy
| | - Elisabetta Menna
- IRCCS Humanitas Research Hospital, Via Manzoni 56, Rozzano (MI), Italy
- Institute of Neuroscience, National Research Council of Italy (CNR) c/o Humanitas Mirasole S.p.A, Via Manzoni 56, Rozzano (MI), Italy
| | - Simona Lodato
- IRCCS Humanitas Research Hospital, Via Manzoni 56, Rozzano (MI), Italy
- Department of Biomedical Sciences, Humanitas University, Via R. Levi Montalcini 4, Pieve Emanuele (MI), Italy
| | - Maria Rescigno
- IRCCS Humanitas Research Hospital, Via Manzoni 56, Rozzano (MI), Italy
- Department of Biomedical Sciences, Humanitas University, Via R. Levi Montalcini 4, Pieve Emanuele (MI), Italy
| | - Giuseppe Martano
- IRCCS Humanitas Research Hospital, Via Manzoni 56, Rozzano (MI), Italy
- Institute of Neuroscience, National Research Council of Italy (CNR) c/o Humanitas Mirasole S.p.A, Via Manzoni 56, Rozzano (MI), Italy
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Rubiola S, Moroni B, Carisio L, Rossi L, Chiesa F, Martano G, Cavallo E, Rambozzi L. Correction: Rubiola et al. Risk Factors for Bovine Cysticercosis in North-West Italy: A Multi-Year Case-Control Study. Animals 2021, 11, 3049. Animals (Basel) 2022; 12:636. [PMID: 35268239 PMCID: PMC8909052 DOI: 10.3390/ani12050636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 02/15/2022] [Indexed: 11/30/2022] Open
Abstract
Error in Institutional Review Board Statement [...].
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Affiliation(s)
- Selene Rubiola
- Department of Veterinary Sciences, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Italy; (B.M.); (L.R.); (F.C.); (L.R.)
| | - Barbara Moroni
- Department of Veterinary Sciences, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Italy; (B.M.); (L.R.); (F.C.); (L.R.)
| | - Luca Carisio
- Department of Agricultural, Forest and Food Sciences, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Italy;
| | - Luca Rossi
- Department of Veterinary Sciences, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Italy; (B.M.); (L.R.); (F.C.); (L.R.)
| | - Francesco Chiesa
- Department of Veterinary Sciences, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Italy; (B.M.); (L.R.); (F.C.); (L.R.)
| | - Giuseppe Martano
- ASL TO3, Animal Health, Via Martiri XXX Aprile 30, 10093 Collegno, Italy; (G.M.); (E.C.)
| | - Elisa Cavallo
- ASL TO3, Animal Health, Via Martiri XXX Aprile 30, 10093 Collegno, Italy; (G.M.); (E.C.)
| | - Luisa Rambozzi
- Department of Veterinary Sciences, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Italy; (B.M.); (L.R.); (F.C.); (L.R.)
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Dolci S, Mannino L, Bottani E, Campanelli A, Di Chio M, Zorzin S, D'Arrigo G, Amenta A, Segala A, Paglia G, Denti V, Fumagalli G, Nisoli E, Valerio A, Verderio C, Martano G, Bifari F, Decimo I. Therapeutic Induction of Energy Metabolism Reduces Neural Tissue Damage and Increases Microglia Activation in Severe Spinal Cord Injury. Pharmacol Res 2022; 178:106149. [PMID: 35240272 DOI: 10.1016/j.phrs.2022.106149] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/16/2022] [Accepted: 02/26/2022] [Indexed: 01/11/2023]
Abstract
Neural tissue has high metabolic requirements. Following spinal cord injury (SCI), the damaged, tissue suffers from a severe metabolic impairment, which aggravates axonal degeneration and, neuronal loss. Impaired cellular energetic, tricarboxylic acid (TCA) cycle and oxidative, phosphorylation metabolism in neuronal cells has been demonstrated to be a major cause of neural tissue death and regeneration failure following SCI. Therefore, rewiring the spinal cord cell metabolism may be an innovative therapeutic strategy for the treatment of SCI. In this study, we evaluated the therapeutic effect of the recovery of oxidative metabolism in a mouse model of severe contusive SCI. Oral administration of TCA cycle intermediates, co-factors, essential amino acids, and branched-chain amino acids was started 3 days post-injury and continued until the end of the experimental procedures. Metabolomic, immunohistological, and biochemical analyses were performed on the injured spinal cord sections. Administration of metabolic precursors enhanced spinal cord oxidative metabolism. In line with this metabolic shift, we observed the activation of the mTORC1 anabolic pathway, the increase in mitochondrial mass, and ROS defense which effectively prevented the injury-induced neural cell apoptosis in treated animals. Consistently, we found more choline acetyltransferase (ChAT)-expressing motor neurons and increased neurofilament positive corticospinal axons in the spinal cord parenchyma of the treated mice. Interestingly, oral administration of the metabolic precursors increased the number of activated microglia expressing the CD206 marker suggestive of a, pro-resolutive, M2-like phenotype. These molecular and histological modifications observed in treated animals ultimately led to a significant, although partial, improvement of the motor functions. Our data demonstrate that rewiring the cellular metabolism can represent an effective strategy to treat SCI.
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Affiliation(s)
- Sissi Dolci
- Department of Diagnostic and Public Health, Section of Pharmacology, University of Verona, 37134, Italy
| | - Loris Mannino
- Department of Diagnostic and Public Health, Section of Pharmacology, University of Verona, 37134, Italy
| | - Emanuela Bottani
- Department of Diagnostic and Public Health, Section of Pharmacology, University of Verona, 37134, Italy
| | - Alessandra Campanelli
- Department of Diagnostic and Public Health, Section of Pharmacology, University of Verona, 37134, Italy
| | - Marzia Di Chio
- Department of Diagnostic and Public Health, Section of Pharmacology, University of Verona, 37134, Italy
| | - Stefania Zorzin
- Department of Diagnostic and Public Health, Section of Pharmacology, University of Verona, 37134, Italy
| | | | - Alessia Amenta
- Laboratory of Cell Metabolism and Regenerative Medicine, Department of Medical Biotechnology and Translational Medicine, University of Milan, 20133, Italy
| | - Agnese Segala
- Department of Molecular and Translational Medicine, University of Brescia, 25121, Italy
| | - Giuseppe Paglia
- School of Medicine and Surgery, Università degli Studi di Milano-Bicocca, 20126, Italy
| | - Vanna Denti
- School of Medicine and Surgery, Università degli Studi di Milano-Bicocca, 20126, Italy
| | - Guido Fumagalli
- Department of Diagnostic and Public Health, Section of Pharmacology, University of Verona, 37134, Italy
| | - Enzo Nisoli
- Center for Study and Research on Obesity, Department of Medical Biotechnology and Translational Medicine, University of Milan, 20133, Italy
| | - Alessandra Valerio
- Department of Molecular and Translational Medicine, University of Brescia, 25121, Italy
| | | | | | - Francesco Bifari
- Laboratory of Cell Metabolism and Regenerative Medicine, Department of Medical Biotechnology and Translational Medicine, University of Milan, 20133, Italy.
| | - Ilaria Decimo
- Department of Diagnostic and Public Health, Section of Pharmacology, University of Verona, 37134, Italy.
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Cattaneo A, Martano G, Restuccia U, Tronci L, Bianchi M, Bachi A, Matafora V. Opti-nQL: An Optimized, Versatile and Sensitive Nano-LC Method for MS-Based Lipidomics Analysis. Metabolites 2021; 11:720. [PMID: 34822378 PMCID: PMC8623082 DOI: 10.3390/metabo11110720] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/20/2021] [Accepted: 10/19/2021] [Indexed: 11/17/2022] Open
Abstract
Lipidomics is the comprehensive analysis of lipids in a given biological system. This investigation is often limited by the low amount and high complexity of biological samples, therefore highly sensitive lipidomics methods are required. Nanoflow-LC/MS offers extremely high sensitivity; however, it is challenging as a more demanding maintenance is often needed compared to conventional microflow-LC approaches. Here, we developed a sensitive and reproducible lipidomics LC method, termed Opti-nQL, which can be applied to any biological system. Opti-nQL has been validated with cellular lipid extracts of human and mouse origin and with different lipid extraction methods. Among the resulting 4000 detected features, 700 and even more unique lipid molecular species have been identified covering 16 lipid sub-classes, while 400 lipids were uniquely structure defined by MS/MS. These results were obtained by analyzing an amount of lipids extract equivalent to 40 ng of proteins, being highly suitable for low abundant samples. MS analysis showed that theOpti-nQL method increases the number of identified lipids, which is evidenced by injecting 20 times less material than in microflow based chromatography, being more reproducible and accurate thus enhancing robustness of lipidomics analysis.
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Affiliation(s)
- Angela Cattaneo
- Cogentech SRL Benefit Corporation, 20139 Milan, Italy; (A.C.); (M.B.)
| | | | - Umberto Restuccia
- The FIRC Institute of Molecular Oncology (IFOM), 20139 Milan, Italy; (U.R.); (L.T.); (V.M.)
- ADIENNE Pharma & Biotech, 20867 Caponago, Italy
| | - Laura Tronci
- The FIRC Institute of Molecular Oncology (IFOM), 20139 Milan, Italy; (U.R.); (L.T.); (V.M.)
- Division of Genetics and Cell Biology, IRCCS-San Raffaele Scientific Institute, Molecular Basis of Cystic Kidney Diseases, 20132 Milan, Italy
| | - Michele Bianchi
- Cogentech SRL Benefit Corporation, 20139 Milan, Italy; (A.C.); (M.B.)
| | - Angela Bachi
- The FIRC Institute of Molecular Oncology (IFOM), 20139 Milan, Italy; (U.R.); (L.T.); (V.M.)
| | - Vittoria Matafora
- The FIRC Institute of Molecular Oncology (IFOM), 20139 Milan, Italy; (U.R.); (L.T.); (V.M.)
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Matafora V, Farris F, Restuccia U, Tamburri S, Martano G, Bernardelli C, Sofia A, Pisati F, Casagrande F, Lazzari L, Marsoni S, Bonoldi E, Bachi A. Amyloid aggregates accumulate in melanoma metastasis modulating YAP activity. EMBO Rep 2020; 21:e50446. [PMID: 32749065 PMCID: PMC7507035 DOI: 10.15252/embr.202050446] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [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: 03/17/2020] [Revised: 06/27/2020] [Accepted: 07/07/2020] [Indexed: 12/13/2022] Open
Abstract
Melanoma progression is generally associated with increased transcriptional activity mediated by the Yes-associated protein (YAP). Mechanical signals from the extracellular matrix are sensed by YAP, which then activates the expression of proliferative genes, promoting melanoma progression and drug resistance. Which extracellular signals induce mechanotransduction, and how this is mediated, is not completely understood. Here, using secretome analyses, we reveal the extracellular accumulation of amyloidogenic proteins, i.e. premelanosome protein (PMEL), in metastatic melanoma, together with proteins that assist amyloid maturation into fibrils. We also confirm the accumulation of amyloid-like aggregates, similar to those detected in Alzheimer disease, in metastatic cell lines, as well as in human melanoma biopsies. Mechanistically, beta-secretase 2 (BACE2) regulates the maturation of these aggregates, which in turn induce YAP activity. We also demonstrate that recombinant PMEL fibrils are sufficient to induce mechanotransduction, triggering YAP signaling. Finally, we demonstrate that BACE inhibition affects cell proliferation and increases drug sensitivity, highlighting the importance of amyloids for melanoma survival, and the use of beta-secretase inhibitors as potential therapeutic approach for metastatic melanoma.
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Affiliation(s)
| | | | - Umberto Restuccia
- IFOM‐ FIRC Institute of Molecular OncologyMilanItaly
- Present address:
ADIENNE Pharma & BiotechCaponagoItaly
| | - Simone Tamburri
- IFOM‐ FIRC Institute of Molecular OncologyMilanItaly
- Present address:
Department of Experimental OncologyIEO‐European Institute of Oncology IRCCSMilanItaly
| | | | - Clara Bernardelli
- IFOM‐ FIRC Institute of Molecular OncologyMilanItaly
- Present address:
Fondazione Politecnico di MilanoMilanItaly
| | - Andrea Sofia
- IFOM‐ FIRC Institute of Molecular OncologyMilanItaly
- University of InsubriaVareseItaly
| | - Federica Pisati
- IFOM‐ FIRC Institute of Molecular OncologyMilanItaly
- Cogentech SRL Benefit CorporationMilanItaly
| | | | - Luca Lazzari
- IFOM‐ FIRC Institute of Molecular OncologyMilanItaly
| | | | - Emanuela Bonoldi
- Department of Laboratory MedicineDivision of PathologyGrande Ospedale Metropolitano NiguardaMilanItaly
| | - Angela Bachi
- IFOM‐ FIRC Institute of Molecular OncologyMilanItaly
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Martano G, Leone M, D'Oro P, Matafora V, Cattaneo A, Masseroli M, Bachi A. SMfinder: Small Molecules Finder for Metabolomics and Lipidomics Analysis. Anal Chem 2020; 92:8874-8882. [PMID: 32501676 DOI: 10.1021/acs.analchem.0c00585] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Metabolomics and lipidomics studies are becoming increasingly popular but available tools for automated data analysis are still limited. The major issue in untargeted metabolomics is linked to the lack of efficient ranking methods allowing accurate identification of metabolites. Herein, we provide a user-friendly open-source software, named SMfinder, for the robust identification and quantification of small molecules. The software introduces an MS2 false discovery rate approach, which is based on single spectral permutation and increases identification accuracy. SMfinder can be efficiently applied to shotgun and targeted analysis in metabolomics and lipidomics without requiring extensive in-house acquisition of standards as it provides accurate identification by using available MS2 libraries in instrument independent manner. The software, downloadable at www.ifom.eu/SMfinder, is suitable for untargeted, targeted, and flux analysis.
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Affiliation(s)
- Giuseppe Martano
- IFOM, The FIRC Institute of Molecular Oncology, 20139 Milan, Italy
| | - Michele Leone
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, 20129 Milan, Italy
| | - Pierluca D'Oro
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, 20129 Milan, Italy
| | | | - Angela Cattaneo
- IFOM, The FIRC Institute of Molecular Oncology, 20139 Milan, Italy
| | - Marco Masseroli
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, 20129 Milan, Italy
| | - Angela Bachi
- IFOM, The FIRC Institute of Molecular Oncology, 20139 Milan, Italy
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Martano G, Borroni EM, Lopci E, Cattaneo MG, Mattioli M, Bachi A, Decimo I, Bifari F. Metabolism of Stem and Progenitor Cells: Proper Methods to Answer Specific Questions. Front Mol Neurosci 2019; 12:151. [PMID: 31249511 PMCID: PMC6584756 DOI: 10.3389/fnmol.2019.00151] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 05/28/2019] [Indexed: 01/01/2023] Open
Abstract
Stem cells can stay quiescent for a long period of time or proliferate and differentiate into multiple lineages. The activity of stage-specific metabolic programs allows stem cells to best adapt their functions in different microenvironments. Specific cellular phenotypes can be, therefore, defined by precise metabolic signatures. Notably, not only cellular metabolism describes a defined cellular phenotype, but experimental evidence now clearly indicate that also rewiring cells towards a particular cellular metabolism can drive their cellular phenotype and function accordingly. Cellular metabolism can be studied by both targeted and untargeted approaches. Targeted analyses focus on a subset of identified metabolites and on their metabolic fluxes. In addition, the overall assessment of the oxygen consumption rate (OCR) gives a measure of the overall cellular oxidative metabolism and mitochondrial function. Untargeted approach provides a large-scale identification and quantification of the whole metabolome with the aim to describe a metabolic fingerprinting. In this review article, we overview the methodologies currently available for the study of invitro stem cell metabolism, including metabolic fluxes, fingerprint analyses, and single-cell metabolomics. Moreover, we summarize available approaches for the study of in vivo stem cell metabolism. For all of the described methods, we highlight their specificities and limitations. In addition, we discuss practical concerns about the most threatening steps, including metabolic quenching, sample preparation and extraction. A better knowledge of the precise metabolic signature defining specific cell population is instrumental to the design of novel therapeutic strategies able to drive undifferentiated stem cells towards a selective and valuable cellular phenotype.
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Affiliation(s)
| | - Elena Monica Borroni
- Humanitas Clinical and Research Center, Rozzano, Italy.,Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Egesta Lopci
- Nuclear Medicine Unit, Humanitas Clinical and Research Hospital-IRCCS, Rozzano, Italy
| | - Maria Grazia Cattaneo
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Milena Mattioli
- Laboratory of Cell Metabolism and Regenerative Medicine, Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Angela Bachi
- IFOM-FIRC Institute of Molecular Oncology, Milan, Italy
| | - Ilaria Decimo
- Laboratory of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Francesco Bifari
- Laboratory of Cell Metabolism and Regenerative Medicine, Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
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Murru L, Moretto E, Martano G, Passafaro M. Tetraspanins shape the synapse. Mol Cell Neurosci 2018; 91:76-81. [DOI: 10.1016/j.mcn.2018.04.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/29/2018] [Accepted: 04/01/2018] [Indexed: 01/01/2023] Open
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Lotfi P, Tse DY, Di Ronza A, Seymour ML, Martano G, Cooper JD, Pereira FA, Passafaro M, Wu SM, Sardiello M. Trehalose reduces retinal degeneration, neuroinflammation and storage burden caused by a lysosomal hydrolase deficiency. Autophagy 2018; 14:1419-1434. [PMID: 29916295 PMCID: PMC6103706 DOI: 10.1080/15548627.2018.1474313] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The accumulation of undegraded molecular material leads to progressive neurodegeneration in a number of lysosomal storage disorders (LSDs) that are caused by functional deficiencies of lysosomal hydrolases. To determine whether inducing macroautophagy/autophagy via small-molecule therapy would be effective for neuropathic LSDs due to enzyme deficiency, we treated a mouse model of mucopolysaccharidosis IIIB (MPS IIIB), a storage disorder caused by deficiency of the enzyme NAGLU (alpha-N-acetylglucosaminidase [Sanfilippo disease IIIB]), with the autophagy-inducing compound trehalose. Treated naglu–/ – mice lived longer, displayed less hyperactivity and anxiety, retained their vision (and retinal photoreceptors), and showed reduced inflammation in the brain and retina. Treated mice also showed improved clearance of autophagic vacuoles in neuronal and glial cells, accompanied by activation of the TFEB transcriptional network that controls lysosomal biogenesis and autophagic flux. Therefore, small-molecule-induced autophagy enhancement can improve the neurological symptoms associated with a lysosomal enzyme deficiency and could provide a viable therapeutic approach to neuropathic LSDs. Abbreviations: ANOVA: analysis of variance; Atg7: autophagy related 7; AV: autophagic vacuoles; CD68: cd68 antigen; ERG: electroretinogram; ERT: enzyme replacement therapy; GAPDH: glyceraldehyde-3-phosphate dehydrogenase; GFAP: glial fibrillary acidic protein; GNAT2: guanine nucleotide binding protein, alpha transducing 2; HSCT: hematopoietic stem cell transplantation; INL: inner nuclear layer; LC3: microtubule-associated protein 1 light chain 3 alpha; MPS: mucopolysaccharidoses; NAGLU: alpha-N-acetylglucosaminidase (Sanfilippo disease IIIB); ONL: outer nuclear layer; PBS: phosphate-buffered saline; PRKCA/PKCα: protein kinase C, alpha; S1BF: somatosensory cortex; SQSTM1: sequestosome 1; TEM: transmission electron microscopy; TFEB: transcription factor EB; VMP/VPL: ventral posterior nuclei of the thalamus
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Affiliation(s)
- Parisa Lotfi
- a Department of Molecular and Human Genetics , Baylor College of Medicine, Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital , Houston , TX , USA
| | - Dennis Y Tse
- b Department of Ophthalmology , Cullen Eye Institute, Baylor College of Medicine , Houston , TX , USA.,c School of Optometry , The Hong Kong Polytechnic University , Kowloon , Hong Kong
| | - Alberto Di Ronza
- a Department of Molecular and Human Genetics , Baylor College of Medicine, Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital , Houston , TX , USA
| | - Michelle L Seymour
- d Huffington Center on Aging, Department of Molecular and Cellular Biology , Baylor College of Medicine , Houston , TX , USA.,e Department of Otolaryngology-Head & Neck Surgery , Baylor College of Medicine , Houston , TX , USA
| | | | - Jonathan D Cooper
- g Department of Basic and Clinical Neuroscience , Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience , Kings College London , London , UK.,h Department of Pediatrics, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center , David Geffen School of Medicine, UCLA , Torrance , CA , USA
| | - Fred A Pereira
- d Huffington Center on Aging, Department of Molecular and Cellular Biology , Baylor College of Medicine , Houston , TX , USA.,e Department of Otolaryngology-Head & Neck Surgery , Baylor College of Medicine , Houston , TX , USA
| | | | - Samuel M Wu
- b Department of Ophthalmology , Cullen Eye Institute, Baylor College of Medicine , Houston , TX , USA
| | - Marco Sardiello
- a Department of Molecular and Human Genetics , Baylor College of Medicine, Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital , Houston , TX , USA
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Moretto E, Murru L, Martano G, Sassone J, Passafaro M. Glutamatergic synapses in neurodevelopmental disorders. Prog Neuropsychopharmacol Biol Psychiatry 2018; 84:328-342. [PMID: 28935587 DOI: 10.1016/j.pnpbp.2017.09.014] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 08/28/2017] [Accepted: 09/16/2017] [Indexed: 12/22/2022]
Abstract
Neurodevelopmental disorders (NDDs) are a group of diseases whose symptoms arise during childhood or adolescence and that impact several higher cognitive functions such as learning, sociability and mood. Accruing evidence suggests that a shared pathogenic mechanism underlying these diseases is the dysfunction of glutamatergic synapses. We summarize present knowledge on autism spectrum disorders (ASD), intellectual disability (ID), Down syndrome (DS), Rett syndrome (RS) and attention-deficit hyperactivity disorder (ADHD), highlighting the involvement of glutamatergic synapses and receptors in these disorders. The most commonly shared defects involve α-amino-3-hydroxy-5-methyl- 4-isoxazole propionic acid receptors (AMPARs), N-methyl-d-aspartate receptors (NMDARs) and metabotropic glutamate receptors (mGluRs), whose functions are strongly linked to synaptic plasticity, affecting both cell-autonomous features as well as circuit formation. Moreover, the major scaffolding proteins and, thus, the general structure of the synapse are often deregulated in neurodevelopmental disorders, which is not surprising considering their crucial role in the regulation of glutamate receptor positioning and functioning. This convergence of defects supports the definition of neurodevelopmental disorders as a continuum of pathological manifestations, suggesting that glutamatergic synapses could be a therapeutic target to ameliorate patient symptomatology.
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Affiliation(s)
- Edoardo Moretto
- CNR, Institute of Neuroscience, Via Vanvitelli 32, 20129 Milan, Italy
| | - Luca Murru
- CNR, Institute of Neuroscience, Via Vanvitelli 32, 20129 Milan, Italy
| | - Giuseppe Martano
- CNR, Institute of Neuroscience, Via Vanvitelli 32, 20129 Milan, Italy
| | - Jenny Sassone
- San Raffaele Scientific Institute, Vita-Salute University, Milan, Italy
| | - Maria Passafaro
- CNR, Institute of Neuroscience, Via Vanvitelli 32, 20129 Milan, Italy.
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Martano G, Gerosa L, Prada I, Garrone G, Krogh V, Verderio C, Passafaro M. Biosynthesis of Astrocytic Trehalose Regulates Neuronal Arborization in Hippocampal Neurons. ACS Chem Neurosci 2017; 8:1865-1872. [PMID: 28692243 DOI: 10.1021/acschemneuro.7b00177] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Trehalose is a nonreducing disaccharide that has recently attracted much attention because of its ability to inhibit protein aggregation, induce autophagy, and protect against dissections and strokes. In vertebrates, the biosynthesis of trehalose was long considered absent due to the lack of annotated genes involved in this process. In contrast, trehalase (TreH), which is an enzyme required for the cleavage of trehalose, is known to be conserved and expressed. Here, we show that trehalose is present as an endogenous metabolite in the rodent hippocampus. We found that primary astrocytes were able to synthesize trehalose and release it into the extracellular space. Notably, the TreH enzyme was observed only in the soma of neurons, which are the exclusive users of this substrate. A statistical analysis of the metabolome during different stages of maturation indicated that this metabolite is implicated in neuronal maturation. A morphological analysis of primary neurons confirmed that trehalose is required for neuronal arborization.
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Affiliation(s)
- Giuseppe Martano
- Institute of Neuroscience, CNR, Via Luigi Vanvitelli, 32, I-20129 Milan, Italy
| | - Laura Gerosa
- Institute of Neuroscience, CNR, Via Luigi Vanvitelli, 32, I-20129 Milan, Italy
| | - Ilaria Prada
- Institute of Neuroscience, CNR, Via Luigi Vanvitelli, 32, I-20129 Milan, Italy
- Department
of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, Via Luigi Vanvitelli, 32, I-20159 Milan, Italy
| | - Giulia Garrone
- Fondazione IRCCS Istituto Nazionale dei Tumori, Via Giacomo Venezian, 1, I-20133 Milan, Italy
| | - Vittorio Krogh
- Fondazione IRCCS Istituto Nazionale dei Tumori, Via Giacomo Venezian, 1, I-20133 Milan, Italy
| | - Claudia Verderio
- Institute of Neuroscience, CNR, Via Luigi Vanvitelli, 32, I-20129 Milan, Italy
- IRCCS Humanitas, Via Manzoni
56, I-20089 Rozzano, Italy
| | - Maria Passafaro
- Institute of Neuroscience, CNR, Via Luigi Vanvitelli, 32, I-20129 Milan, Italy
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12
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Cattaneo MG, Vanetti C, Decimo I, Di Chio M, Martano G, Garrone G, Bifari F, Vicentini LM. Sex-specific eNOS activity and function in human endothelial cells. Sci Rep 2017; 7:9612. [PMID: 28852041 PMCID: PMC5575132 DOI: 10.1038/s41598-017-10139-x] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 08/04/2017] [Indexed: 12/11/2022] Open
Abstract
Clinical and epidemiological data show that biological sex is one of the major determinants for the development and progression of cardiovascular disease (CVD). Impaired endothelial function, characterized by an imbalance in endothelial Nitric Oxide Synthase (eNOS) activity, precedes and accelerates the development of CVD. However, whether there is any sexual dimorphism in eNOS activity and function in endothelial cells (ECs) is still unknown. Here, by independently studying human male and female ECs, we found that female ECs expressed higher eNOS mRNA and protein levels both in vitro and ex vivo. The increased eNOS expression was associated to higher enzymatic activity and nitric oxide production. Pharmacological and genetic inhibition of eNOS affected migratory properties only in female ECs. In vitro angiogenesis experiments confirmed that sprouting mostly relied on eNOS-dependent migration in female ECs. At variance, capillary outgrowth from male ECs was independent of eNOS activity but required cell proliferation. In this study, we found sex-specific differences in the EC expression, activity, and function of eNOS. This intrinsic sexual dimorphism of ECs should be further evaluated to achieve more effective and precise strategies for the prevention and therapy of diseases associated to an impaired endothelial function such as CVD and pathological angiogenesis.
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Affiliation(s)
- Maria Grazia Cattaneo
- Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, 20129, Milano, Italy.
| | - Claudia Vanetti
- Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, 20129, Milano, Italy
| | - Ilaria Decimo
- Department of Diagnostics and Public Health, Università di Verona, 37134, Verona, Italy
| | - Marzia Di Chio
- Department of Diagnostics and Public Health, Università di Verona, 37134, Verona, Italy
| | | | - Giulia Garrone
- Fondazione IRCCS, Istituto Nazionale dei Tumori, 20133, Milano, Italy
| | - Francesco Bifari
- Laboratory of Cell Metabolism and Regenerative Medicine, Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, 20129, Milano, Italy
| | - Lucia Maria Vicentini
- Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, 20129, Milano, Italy.
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Irico L, Tomassone L, Martano G, Gottardo F, Tarantola M. Animal welfare and reproductive performance in two Piemontese housing systems. Italian Journal of Animal Science 2017. [DOI: 10.1080/1828051x.2017.1369181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - Laura Tomassone
- Dipartimento di Scienze Veterinarie, University of Torino, Torino, Italy
| | | | - Flaviana Gottardo
- Dipartimento di Medicina Animale, Produzione e Salute, University of Padova, Padova, Italy
| | - Martina Tarantola
- Dipartimento di Scienze Veterinarie, University of Torino, Torino, Italy
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Haider C, Ferk F, Bojaxhi E, Martano G, Stutz H, Bresgen N, Knasmüller S, Alija A, Eckl PM. Effects of β-Carotene and Its Cleavage Products in Primary Pneumocyte Type II Cells. Antioxidants (Basel) 2017; 6:antiox6020037. [PMID: 28531132 PMCID: PMC5488017 DOI: 10.3390/antiox6020037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 05/08/2017] [Accepted: 05/16/2017] [Indexed: 12/22/2022] Open
Abstract
β-Carotene has been shown to increase the risk of developing lung cancer in smokers and asbestos workers in two large scale trails, the Beta-Carotene and Retinol Efficacy Trial (CARET) and the Alpha-Tocopherol Beta-carotene Cancer Prevention Trial (ATBC). Based on this observation, it was proposed that genotoxic oxidative breakdown products may cause this effect. In support of this assumption, increased levels of sister chromatid exchanges, micronuclei, and chromosomal aberrations were found in primary hepatocyte cultures treated with a mixture of cleavage products (CPs) and the major product apo-8′carotenal. However, because these findings cannot directly be transferred to the lung due to the exceptional biotransformation capacity of the liver, potential genotoxic and cytotoxic effects of β-carotene under oxidative stress and its CPs were investigated in primary pneumocyte type II cells. The results indicate that increased concentrations of β-carotene in the presence of the redox cycling quinone dimethoxynaphthoquinone (DMNQ) exhibit a cytotoxic potential, as evidenced by an increase of apoptotic cells and loss of cell density at concentrations > 10 µM. On the other hand, the analysis of micronucleated cells gave no clear picture due to the cytotoxicity related reduction of mitotic cells. Last, although CPs induced significant levels of DNA strand breaks even at concentrations ≥ 1 µM and 5 µM, respectively, β-carotene in the presence of DMNQ did not cause DNA damage. Instead, β-carotene appeared to act as an antioxidant. These findings are in contrast with what was demonstrated for primary hepatocytes and may reflect different sensitivities to and different metabolism of β-carotene in the two cell types.
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Affiliation(s)
- Cornelia Haider
- Department of Cell Biology and Physiology, University of Salzburg, Hellbrunnerstr. 34, Salzburg A-A-5020, Austria.
| | - Franziska Ferk
- Institute of Cancer Research, Department of Internal Medicine 1, Medical University of Borschkegasse 8a, Vienna A-1090, Austria.
| | - Ekramije Bojaxhi
- Department of Cell Biology and Physiology, University of Salzburg, Hellbrunnerstr. 34, Salzburg A-A-5020, Austria.
| | - Giuseppe Martano
- Department of Molecular Biology, University of Salzburg, Hellbrunnerstr. 34, Salzburg 5020, Austria.
| | - Hanno Stutz
- Department of Molecular Biology, University of Salzburg, Hellbrunnerstr. 34, Salzburg 5020, Austria.
| | - Nikolaus Bresgen
- Department of Cell Biology and Physiology, University of Salzburg, Hellbrunnerstr. 34, Salzburg A-A-5020, Austria.
| | - Siegfried Knasmüller
- Institute of Cancer Research, Department of Internal Medicine 1, Medical University of Borschkegasse 8a, Vienna A-1090, Austria.
| | - Avdulla Alija
- Department of Biology, University of Prishtina, Xhorxh Bush, n.n., Prishtina 10000, Kosova.
| | - Peter M Eckl
- Department of Cell Biology and Physiology, University of Salzburg, Hellbrunnerstr. 34, Salzburg A-A-5020, Austria.
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15
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Martano G, Murru L, Moretto E, Gerosa L, Garrone G, Krogh V, Passafaro M. Biosynthesis of glycerol phosphate is associated with long-term potentiation in hippocampal neurons. Metabolomics 2016; 12:133. [PMID: 27499721 PMCID: PMC4958395 DOI: 10.1007/s11306-016-1083-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 07/18/2016] [Indexed: 01/10/2023]
Abstract
INTRODUCTION Neurons have a very high energy requirement, and their metabolism is tightly regulated to ensure delivery of adequate substrate to sustain neuronal activity and neuroplastic changes. The mechanisms underlying the regulation of neuronal metabolism, however, are not completely clear. OBJECTIVE The objective of this study was to investigate the central carbon metabolism in neurons, in order to identify the regulatory pathways governing neuronal anabolism and catabolism. METHODS Here we first have applied MS-based endometabolomics to elucidate the metabolic dynamics in cultured hippocampal primary neurons. Using nanoLC-ESI-LTQ Orbitrap MS approach followed by statistical analysis, we measure the dynamics of uniformly labeled 13C-glucose entering neurons. We adapted the method by coupling offline patch-clamp setup with MS to confirm findings in vivo. RESULTS According to non-parametric statistical analysis of metabolic dynamics, in cultured hippocampal neurons, the glycerol phosphate shuttle is active and correlates with the metabolic flux in the pentose phosphate pathway. In the hippocampus, glycerol-3-phosphate biosynthesis was activated in response to long-term potentiation together with the upregulation of glycolysis and the TCA cycle, but was inactive or silenced in basal conditions. CONCLUSIONS We identified the biosynthesis of glycerol-3-phosphate as a key regulator in mechanisms implicated in learning and memory. Notably, defects in enzymes linked with the glycerol phosphate shuttle have been implicated in neurological disorders and intellectual disability. These results could improve our understanding of the general mechanisms of learning and memory and facilitate the development of novel therapies for metabolic disorders linked with intellectual disability.
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Affiliation(s)
- Giuseppe Martano
- Institute of Neuroscience, CNR, Via L. Vanvitelli 32, 20129 Milan, Italy
| | - Luca Murru
- Institute of Neuroscience, CNR, Via L. Vanvitelli 32, 20129 Milan, Italy
| | - Edoardo Moretto
- Institute of Neuroscience, CNR, Via L. Vanvitelli 32, 20129 Milan, Italy
| | - Laura Gerosa
- Institute of Neuroscience, CNR, Via L. Vanvitelli 32, 20129 Milan, Italy
| | - Giulia Garrone
- Fondazione IRCCS, Istituto Nazionale dei Tumori, Via Giacomo Venezian, 1, 20133 Milan, Italy
| | - Vittorio Krogh
- Fondazione IRCCS, Istituto Nazionale dei Tumori, Via Giacomo Venezian, 1, 20133 Milan, Italy
| | - Maria Passafaro
- Institute of Neuroscience, CNR, Via L. Vanvitelli 32, 20129 Milan, Italy
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16
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Martano G, Delmotte N, Kiefer P, Christen P, Kentner D, Bumann D, Vorholt JA. Fast sampling method for mammalian cell metabolic analyses using liquid chromatography-mass spectrometry. Nat Protoc 2014; 10:1-11. [PMID: 25474028 DOI: 10.1038/nprot.2014.198] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Metabolomics has emerged as a powerful tool for addressing biological questions. Liquid chromatography coupled with mass spectrometry (LC-MS) is widely used for metabolic characterization, including targeted and untargeted approaches. Despite recent innovations, a crucial aspect of this technique is the sample preparation for accurate data analyses. In this protocol, we present a robust and adaptable workflow for metabolic analyses of mammalian cells from adherent cell cultures, which is particularly suited for qualitative and quantitative central metabolite characterization by LC-MS. Each sample consists of 600,000 mammalian cells grown on cover glasses, allowing for fast and complete transfer of the cells for metabolite extraction or medium exchange, e.g., for labeling experiments. The sampling procedure includes a fast and efficient washing step in liquid flow in water, which reduces cross-contamination and matrix effects while minimizing perturbation of the metabolic steady state of the cells; it is followed by quenching cell metabolism. The latter is achieved by using a -20 °C cold methanol acetonitrile mixture acidified with formic acid, followed by freeze drying, metabolite extraction and LC-MS. The protocol requires 2 s for cell sampling until quenching, and the entire protocol takes a total of 1.5 h per sample when the provided nanoscale LC-MS method is applied.
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Affiliation(s)
- Giuseppe Martano
- Department of Biology, Institute of Microbiology, ETH Zurich, Zurich, Switzerland
| | - Nathanaël Delmotte
- Department of Biology, Institute of Microbiology, ETH Zurich, Zurich, Switzerland
| | - Patrick Kiefer
- Department of Biology, Institute of Microbiology, ETH Zurich, Zurich, Switzerland
| | - Philipp Christen
- Department of Biology, Institute of Microbiology, ETH Zurich, Zurich, Switzerland
| | | | - Dirk Bumann
- Biozentrum, University of Basel, Basel, Switzerland
| | - Julia A Vorholt
- Department of Biology, Institute of Microbiology, ETH Zurich, Zurich, Switzerland
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17
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Martano G, Bojaxhi E, Forstenlehner IC, Huber CG, Bresgen N, Eckl PM, Stutz H. Validation and application of sub-2 μm core-shell UHPLC-UV-ESI-Orbitrap MS for identification and quantification of β-carotene and selected cleavage products with preceding solid-phase extraction. Anal Bioanal Chem 2014; 406:2909-24. [PMID: 24652151 PMCID: PMC3984670 DOI: 10.1007/s00216-014-7725-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 02/21/2014] [Accepted: 02/25/2014] [Indexed: 11/25/2022]
Abstract
A validated ultrahigh-performance liquid chromatography method using 1.7 μm core–shell particles is presented for the identification and quantification of β-carotene (BC) and related cleavage products (CPs) in primary cell culture media. Besides BC, apo-4′-, apo-8′-, apo-10′-, and apo-12′-carotenals, as well as 5,6-epoxy-β-carotene, were selected as target analytes. Detection was performed via an 80-Hz diode array detector and an electrospray ionization–linear quadrupole ion trap–Orbitrap XL mass spectrometer, both hyphenated in series. Total analysis time was below 6 min with peak widths <12 s. Addition of trifluoroacetic acid and tetrahydrofuran to the mobile phase allowed for the mass spectrometric detection of BC and related CPs and reduced peak tailing due to improved solubility of hydrophobic analytes. Intra-day and inter-day precision for UV and mass spectrometric detection were ≤1.5 % for retention times and ≤5.1 % for peak areas. Instrumental linearity was confirmed by Mandel’s fitting test between 0.25 (or 1.00 μg/mL) and 5.00 μg/mL for UV detection. The higher sensitivity of mass spectrometric detection allowed for the coverage of three concentration domains between 0.025 and 5.00 μg/mL in linearity testing. Homoscedasticity was confirmed between 0.10 and 5.00 μg/mL for Orbitrap XL MS. The limits of quantification were between 52.6 and 889.4 ng/mL for UV detection and between 19.3 and 102.4 ng/L for mass spectrometric detection. Offline solid-phase extraction from culture media fortified with BC and CPs provided intra- and inter-day recoveries between 65.8 and 102.4 % with coefficients of variation ≤6.2 %. Primary rat hepatocyte cultures treated with BC and subjected to different oxidative stress conditions contained 5,6-epoxy-BC and apo-4′-carotenal besides residual BC. Apparently, 5,6-epoxy-BC was formed in the medium via autoxidation of BC by ambient oxygen.
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Affiliation(s)
- G. Martano
- Division of Chemistry and Bioanalytics, Department of Molecular Biology, University of Salzburg, 5020 Salzburg, Austria
| | - E. Bojaxhi
- Division of Genetics, Department of Cell Biology, University of Salzburg, 5020 Salzburg, Austria
| | - I. C. Forstenlehner
- Division of Chemistry and Bioanalytics, Department of Molecular Biology, University of Salzburg, 5020 Salzburg, Austria
| | - C. G. Huber
- Division of Chemistry and Bioanalytics, Department of Molecular Biology, University of Salzburg, 5020 Salzburg, Austria
| | - N. Bresgen
- Division of Genetics, Department of Cell Biology, University of Salzburg, 5020 Salzburg, Austria
| | - P. M. Eckl
- Division of Genetics, Department of Cell Biology, University of Salzburg, 5020 Salzburg, Austria
| | - H. Stutz
- Division of Chemistry and Bioanalytics, Department of Molecular Biology, University of Salzburg, 5020 Salzburg, Austria
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Martano G, Vogl C, Bojaxhi E, Bresgen N, Eckl P, Stutz H. Solid-phase extraction and GC-MS analysis of potentially genotoxic cleavage products of β-carotene in primary cell cultures. Anal Bioanal Chem 2011; 400:2415-26. [PMID: 21400075 PMCID: PMC3100505 DOI: 10.1007/s00216-011-4836-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 02/09/2011] [Accepted: 02/22/2011] [Indexed: 11/16/2022]
Abstract
A validated method for the simultaneous determination of prominent volatile cleavage products (CPs) of β-carotene in cell culture media has been developed. Target CPs comprised β-ionone (β-IO), cyclocitral (CC), dihydroactinidiolide (DHA), and 1,1,6-trimethyltetraline (TMT). CPs were extracted by solid-phase extraction applying a phenyl adsorbent, eluted with 10% (v/v) tetrahydrofuran in n-hexane, and identified and quantified by gas chromatography-mass spectrometry with electron impact ionization. Method validation addressed linearity confirmation over two application ranges and homoscedasticity testing. Recoveries from culture media were between 71.7% and 95.7% at 1.0 μg/ml. Precision of recoveries determined in intra-day (N = 5) and inter-day (N = 15) assays were <2.0% and <4.8%, respectively. Limit of detection and limit of quantification of the analysis method were <18.0 and <53.0 ng/ml for β-IO, CC, and TMT, whereas 156 and 474 ng/ml were determined for DHA, respectively. Although extractions of blank matrix proved the absence of interfering peaks, statistical comparison between slopes determined for instrumental and total method linearity revealed significant differences. The method was successfully applied in selecting an appropriate solvent for the fortification of culture media with volatile CPs, including the determination of their availability over the incubation period. For the first time, quantification of volatile CPs in treatment solutions and culture media for primary cells becomes accessible by this validated method. Cultured primary rat hepatocytes in phase contrast after nuclea staining with DAPI including a chromatogram (GC-MS) of volatile cleavage products of b-carotene, which are presumed to exert genotoxic effects on hepatocytes and pneumocytes ![]()
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Affiliation(s)
- G Martano
- Department of Molecular Biology, Division of Chemistry and Bioanalytics, University of Salzburg, Salzburg, Austria
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