| Minimization of spectral pattern changes during HRMAS experiments at 37 degrees celsius by prior focused microwave irradiation. | |
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MedLine Citation:
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PMID: 22286777 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECT: High-resolution magic angle spinning (HRMAS) magnetic resonance spectroscopy provides detailed metabolomic information from intact tissue. However, long acquisition times and high rotation speed may lead to time-dependent spectral pattern changes, which may affect proper interpretation of results. We report a strategy to minimize those changes, even at physiological recording temperature. MATERIALS AND METHODS: Glioblastoma (Gbm) tumours were induced in 12 mice by stereotactic injection of GL261 cells. Animals were sacrificed and tumours were removed and stored in liquid N(2). Half of the samples were exposed to focused microwave (FMW) irradiation prior to HRMAS while the other half was not. Time-course experiments (374 min at 37°C, 9.4T, 3,000 Hz spinning rate) were carried out to monitor spectral pattern changes. Differences were assessed with Unianova test while post-HRMAS histopathology analysis was performed to assess tissue integrity. RESULTS: Significant changes (up to 1.7 fold) were observed in samples without FMW irradiation in several spectral regions e.g. mobile lipids/lactate (0.90-1.30 ppm), acetate (1.90 ppm), N-acetyl aspartate (2.00 ppm), and Choline-containing compounds (3.19-3.25 ppm). No significant changes in the spectral pattern of FMW-irradiated samples were recorded. CONCLUSION: We describe here a successful strategy to minimize spectral pattern changes in mouse Gbm samples using a FMW irradiation system. |
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Authors:
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Myriam Davila; Ana Paula Candiota; Martí Pumarola; Carles Arus |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-29 |
Journal Detail:
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Title: Magma (New York, N.Y.) Volume: - ISSN: 0968-5243 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9310752 Medline TA: MAGMA Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Departament de Bioquímica i Biologia Molecular, Unitat de Bioquímica de Biociències, Edifici Cs, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Spain. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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