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Seo JW, Han K, Lee J, Kim EK, Moon HJ, Yoon JH, Park VY, Baek HM, Kwak JY. Application of metabolomics in prediction of lymph node metastasis in papillary thyroid carcinoma. PLoS One 2018; 13:e0193883. [PMID: 29509799 PMCID: PMC5839571 DOI: 10.1371/journal.pone.0193883] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 02/20/2018] [Indexed: 12/26/2022] Open
Abstract
PURPOSE The aim of this study was to find useful metabolites to predict lymph node (LN) metastasis in patients with papillary thyroid cancer (PTC) through a metabolomics approach and investigate the potential role of metabolites as a novel prognostic marker. MATERIALS AND METHODS Fifty-two consecutive patients (median age: 41.5 years, range 15-74 years) were enrolled who underwent total thyroidectomy and central LN dissection with or without lateral LN dissection in Severance Hospital between October 2013 and July 2015. The study specimens were provided by the Severance Hospital Gene Bank, and consisted of PTC from each patient. The specimens were prepared for proton nuclear magnetic resonance (1H-NMR) spectroscopy. Spectral data by 1H-NMR spectroscopy were acquired, processed, and analyzed. Patients were grouped in three ways, according to the presence of LN metastasis, central LN metastasis and lateral LN metastasis. Chi-square test and the student t-test were used to analyze categorical variables and continuous variables, respectively. The Mann-Whitney U test was used for univariate analysis of metabolites. Orthogonal projections to latent structure discriminant analysis (OPLS-DA) was used for multivariate analysis to discriminate metabolic differences between the two groups. RESULTS Among 52 patients, 32 had central LN metastasis and 19 had lateral LN metastasis. No clinical or histopathological characteristic was significantly different for all comparisons. On univariate analysis, no metabolite showed significant difference for all comparisons. On multivariate analysis, OPLS-DA did not discriminate the presence and absence of LN metastasis. Lactate was found to be the most promising metabolite. CONCLUSIONS No metabolite could discriminate the presence of LN metastasis. However, lactate was found to be the most promising metabolite for discrimination. Further studies with larger sample sizes are needed to elucidate significant metabolites which can indicate the presence of LN metastasis in patients with PTC.
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Affiliation(s)
- Ji Won Seo
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Kyunghwa Han
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science and Center for Clinical Imaging Data Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jandee Lee
- Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Eun-Kyung Kim
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Hee Jung Moon
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jung Hyun Yoon
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Vivian Youngjean Park
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Hyeon-Man Baek
- Gachon University, Department of Biomedical Engineering, Incheon, Republic of Korea
| | - Jin Young Kwak
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science Yonsei University College of Medicine, Seoul, Republic of Korea
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Dietz C, Ehret F, Palmas F, Vandergrift LA, Jiang Y, Schmitt V, Dufner V, Habbel P, Nowak J, Cheng LL. Applications of high-resolution magic angle spinning MRS in biomedical studies II-Human diseases. NMR IN BIOMEDICINE 2017; 30:10.1002/nbm.3784. [PMID: 28915318 PMCID: PMC5690552 DOI: 10.1002/nbm.3784] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 06/21/2017] [Accepted: 07/10/2017] [Indexed: 05/06/2023]
Abstract
High-resolution magic angle spinning (HRMAS) MRS is a powerful method for gaining insight into the physiological and pathological processes of cellular metabolism. Given its ability to obtain high-resolution spectra of non-liquid biological samples, while preserving tissue architecture for subsequent histopathological analysis, the technique has become invaluable for biochemical and biomedical studies. Using HRMAS MRS, alterations in measured metabolites, metabolic ratios, and metabolomic profiles present the possibility to improve identification and prognostication of various diseases and decipher the metabolomic impact of drug therapies. In this review, we evaluate HRMAS MRS results on human tissue specimens from malignancies and non-localized diseases reported in the literature since the inception of the technique in 1996. We present the diverse applications of the technique in understanding pathological processes of different anatomical origins, correlations with in vivo imaging, effectiveness of therapies, and progress in the HRMAS methodology.
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Affiliation(s)
- Christopher Dietz
- Departments of Radiology and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard-MIT Health Sciences & Technology, Charlestown, Massachusetts 02129, USA
- Faculty of Medicine, Julius Maximilian University of Würzburg, 97080 Würzburg, Germany
| | - Felix Ehret
- Departments of Radiology and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard-MIT Health Sciences & Technology, Charlestown, Massachusetts 02129, USA
- Faculty of Medicine, Julius Maximilian University of Würzburg, 97080 Würzburg, Germany
| | - Francesco Palmas
- Departments of Radiology and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard-MIT Health Sciences & Technology, Charlestown, Massachusetts 02129, USA
- Department of Chemical and Geological Sciences, University of Cagliari, Cagliari, Sardinia, 09042 Italy
| | - Lindsey A. Vandergrift
- Departments of Radiology and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard-MIT Health Sciences & Technology, Charlestown, Massachusetts 02129, USA
| | - Yanni Jiang
- Departments of Radiology and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard-MIT Health Sciences & Technology, Charlestown, Massachusetts 02129, USA
- Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029 China
| | - Vanessa Schmitt
- Departments of Radiology and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard-MIT Health Sciences & Technology, Charlestown, Massachusetts 02129, USA
- Faculty of Medicine, Julius Maximilian University of Würzburg, 97080 Würzburg, Germany
| | - Vera Dufner
- Departments of Radiology and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard-MIT Health Sciences & Technology, Charlestown, Massachusetts 02129, USA
- Department of Hematology and Oncology, Charité Medical University of Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Piet Habbel
- Department of Hematology and Oncology, Charité Medical University of Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Johannes Nowak
- Department of Diagnostic and Interventional Radiology, University Hospital of Würzburg, 97080 Würzburg, Germany
| | - Leo L. Cheng
- Departments of Radiology and Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard-MIT Health Sciences & Technology, Charlestown, Massachusetts 02129, USA
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Madhu B, Jauhiainen A, McGuire S, Griffiths JR. Exploration of human brain tumour metabolism using pairwise metabolite-metabolite correlation analysis (MMCA) of HR-MAS 1H NMR spectra. PLoS One 2017; 12:e0185980. [PMID: 29069098 PMCID: PMC5656327 DOI: 10.1371/journal.pone.0185980] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 09/23/2017] [Indexed: 01/09/2023] Open
Abstract
METHODS We quantified 378 HRMAS 1H NMR spectra of human brain tumours (132 glioblastomas, 101 astrocytomas, 75 meningiomas, 37 oligodendrogliomas and 33 metastases) from the eTumour database and looked for metabolic interactions by metabolite-metabolite correlation analysis (MMCA). RESULTS All tumour types showed remarkably similar metabolic correlations. Lactate correlated positively with alanine, glutamate with glutamine; creatine + phosphocreatine (tCr) correlated positively with lactate, alanine and choline + phosphocholine + glycerophosphocholine (tCho), and tCho correlated positively with lactate; fatty acids correlated negatively with lactate, glutamate + glutamine (tGlut), tCr and tCho. Oligodendrogliomas had fewer correlations but they still fitted that pattern. CONCLUSIONS Possible explanations include (i) glycolytic tumour cells (the Warburg effect) generating pyruvate which is converted to lactate, alanine, glutamate and then glutamine; (ii) an association between elevated glycolysis and increased choline turnover in membranes; (iii) an increase in the tCr pool to facilitate phosphocreatine-driven glutamate uptake; (iv) lipid signals come from cytosolic lipid droplets in necrotic or pre-necrotic tumour tissue that has lower concentrations of anabolic and catabolic metabolites. Additional metabolite exchanges with host cells may also be involved. If tumours co-opt a standard set of biochemical mechanisms to grow in the brain, then drugs might be developed to disrupt those mechanisms.
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Affiliation(s)
- Basetti Madhu
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge, United Kingdom
| | | | - Sean McGuire
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge, United Kingdom
| | - John R. Griffiths
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge, United Kingdom
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Keun H. Metabolomic Studies of Patient Material by High-Resolution Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy. Methods Enzymol 2014; 543:297-313. [DOI: 10.1016/b978-0-12-801329-8.00015-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Vettukattil R, Gulati M, Sjøbakk TE, Jakola AS, Kvernmo NAM, Torp SH, Bathen TF, Gulati S, Gribbestad IS. Differentiating diffuse World Health Organization grade II and IV astrocytomas with ex vivo magnetic resonance spectroscopy. Neurosurgery 2013; 72:186-95; discussion 195. [PMID: 23147779 DOI: 10.1227/neu.0b013e31827b9c57] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND The prognosis and treatment of astrocytomas, which are primary brain tumors, vary depending on the grade of the tumor, necessitating a precise preoperative classification. Magnetic resonance spectroscopy (MRS) provides information about metabolites in tissues and is an emerging noninvasive tool to improve diagnostic accuracy in patients with intracranial neoplasia. OBJECTIVE To investigate whether ex vivo MRS could differentiate World Health Organization grade II (A-II) and IV astrocytomas (glioblastomas; GBM) and to correlate MR spectral profiles with clinical parameters. METHODS Patients with A-II and GBM (n = 58) scheduled for surgical resection were enrolled. Tumor specimens were collected during surgery and stored in liquid nitrogen before being analyzed with high-resolution magic angle spinning MRS. The tumors were histopathologically classified according to World Health Organization criteria as GBM (n = 48) and A-II (n = 10). RESULTS Multivariate analysis of ex vivo proton high-resolution magic angle spinning spectra MRS showed differences in the metabolic profiles of different grades of astrocytomas. A-II had higher levels of glycerophosphocholine and myo-inositol than GBM. The latter had more phosphocholine, glycine, and lipids. We observed a significant metabolic difference between recurrent and nonrecurrent GBM (P < .001). Primary GBM had more phosphocholine than recurrent GBM. A significant correlation (P < .001) between lipid and lactate signals and histologically estimated percentage of necrosis was observed in GBM. Spectral profiles were not correlated with age, survival, or magnetic resonance imaging-defined tumor volume. CONCLUSION Ex vivo MRS can differentiate astrocytomas based on their metabolic profiles.
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Affiliation(s)
- Riyas Vettukattil
- Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
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Davila M, Candiota AP, Pumarola M, Arus C. Minimization of spectral pattern changes during HRMAS experiments at 37 degrees celsius by prior focused microwave irradiation. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2013; 25:401-10. [PMID: 22286777 DOI: 10.1007/s10334-012-0303-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 12/21/2011] [Accepted: 01/07/2012] [Indexed: 10/14/2022]
Abstract
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 timedependent 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 N2. 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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Affiliation(s)
- Myriam Davila
- Departament de Bioquímica i Biologia Molecular, Unitat de Bioquímica de Biociències, Edifici Cs, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Valle`s, Spain
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Abstract
Metastasis to the brain is a feared complication of systemic cancer, associated with significant morbidity and poor prognosis. A better understanding of the tumor metabolism might help us meet the challenges in controlling brain metastases. The study aims to characterize the metabolic profile of brain metastases of different origin using high resolution magic angle spinning (HR-MAS) magnetic resonance spectroscopy (MRS) to correlate the metabolic profiles to clinical and pathological information. Biopsy samples of human brain metastases (n = 49) were investigated. A significant correlation between lipid signals and necrosis in brain metastases was observed (p < 0.01), irrespective of their primary origin. The principal component analysis (PCA) showed that brain metastases from malignant melanomas cluster together, while lung carcinomas were metabolically heterogeneous and overlap with other subtypes. Metastatic melanomas have higher amounts of glycerophosphocholine than other brain metastases. A significant correlation between microscopically visible lipid droplets estimated by Nile Red staining and MR visible lipid signals was observed in metastatic lung carcinomas (p = 0.01), indicating that the proton MR visible lipid signals arise from cytoplasmic lipid droplets. MRS-based metabolomic profiling is a useful tool for exploring the metabolic profiles of metastatic brain tumors.
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8
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Pacholczyk B, Fabiańska A, Kusińska R, Potemski P, Kordek R, Jankowski S. Analysis of cancer tissues by means of spectroscopic methods. Contemp Oncol (Pozn) 2012; 16:290-4. [PMID: 23788897 PMCID: PMC3687423 DOI: 10.5114/wo.2012.30056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 11/15/2011] [Accepted: 01/18/2012] [Indexed: 12/31/2022] Open
Abstract
The personalized approach in cancer treatment stimulates the search for new analytical techniques, including spectroscopic methods such as Raman spectroscopy, mass spectrometry MALDI (matrix-assisted laser desorption/ionization) imaging and high-resolution magic angle spinning nuclear magnetic resonance (HR MAS NMR). The purpose of these studies is determination of metabolic profiles of cancer tissues, and their application in diagnostics and therapy of cancers. The review is mainly focused on application of HR MAS NMR technique. Qualitative and quantitative analysis of metabolites by means of this method is described for breast cancer tissues. In the near future HR MAS NMR in vitro studies of metabolic profiles combined with in vivo studies using MRI scanners may be applied as a new diagnostic tool.
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Affiliation(s)
- Barbara Pacholczyk
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Poland
| | - Anna Fabiańska
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Poland
| | - Renata Kusińska
- Department of Pathology, Chair of Oncology, Medical University of Lodz, Poland
| | - Piotr Potemski
- Department of Chemotherapy, Chair of Oncology, Medical University of Lodz, Poland
| | - Radzisław Kordek
- Department of Pathology, Chair of Oncology, Medical University of Lodz, Poland
| | - Stefan Jankowski
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Poland
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Mills SJ, Thompson G, Jackson A. Advanced magnetic resonance imaging biomarkers of cerebral metastases. Cancer Imaging 2012; 12:245-52. [PMID: 22935843 PMCID: PMC3458786 DOI: 10.1102/1470-7330.2012.0012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
There are a number of magnetic resonance imaging techniques available for use in the diagnosis and management of patients with cerebral metastases. This article reviews these techniques, in particular, the advanced imaging methodologies from which quantitative parameters can be derived, the role of these imaging biomarkers have in distinguishing metastases from primary central nervous system tumours and tumour mimics, and metrics that may be of value in predicting the origin of the primary tumour.
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Affiliation(s)
- S J Mills
- Department of Neuroradiology, Salford Royal Foundation Trust Hospital, Salford, Greater Manchester, UK.
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Esteve V, Celda B, Martínez-Bisbal MC. Use of 1H and 31P HRMAS to evaluate the relationship between quantitative alterations in metabolite concentrations and tissue features in human brain tumour biopsies. Anal Bioanal Chem 2012; 403:2611-25. [PMID: 22552786 DOI: 10.1007/s00216-012-6001-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 03/28/2012] [Accepted: 03/30/2012] [Indexed: 11/29/2022]
Abstract
Quantitative multinuclear high-resolution magic angle spinning was performed in order to determine the tissue pH values of and the absolute metabolite concentrations in 33 samples of human brain tumour tissue. Metabolite concentrations were quantified by 1D (1)H and (31)P HRMAS using the electronic reference to in vivo concentrations (ERETIC) synthetic signal. (1)H-(1)H homonuclear and (1)H-(31)P heteronuclear correlation experiments enabled the direct assessment of the (1)H-(31)P spin systems for signals that suffered from overlapping in the 1D (1)H spectra, and linked the information present in the 1D (1)H and (31)P spectra. Afterwards, the main histological features were determined, and high heterogeneity in the tumour content, necrotic content and nonaffected tissue content was observed. The metabolite profiles obtained by HRMAS showed characteristics typical of tumour tissues: rather low levels of energetic molecules and increased concentrations of protective metabolites. Nevertheless, these characteristics were more strongly correlated with the total amount of living tissue than with the tumour cell contents of the samples alone, which could indicate that the sampling conditions make a significant contribution aside from the effect of tumour development in vivo. The use of methylene diphosphonic acid as a chemical shift and concentration reference for the (31)P HRMAS spectra of tissues presented important drawbacks due to its interaction with the tissue. Moreover, the pH data obtained from (31)P HRMAS enabled us to establish a correlation between the pH and the distance between the N(CH(3))(3) signals of phosphocholine and choline in (1)H spectra of the tissue in these tumour samples.
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Affiliation(s)
- Vicent Esteve
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, Burjassot, Spain
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In Vivo Magnetic Resonance Spectroscopic Imaging and Ex Vivo Quantitative Neuropathology by High Resolution Magic Angle Spinning Proton Magnetic Resonance Spectroscopy. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/7657_2011_31] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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12
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Robert O, Sabatier J, Desoubzdanne D, Lalande J, Balayssac S, Gilard V, Martino R, Malet-Martino M. pH optimization for a reliable quantification of brain tumor cell and tissue extracts with (1)H NMR: focus on choline-containing compounds and taurine. Anal Bioanal Chem 2010; 399:987-99. [PMID: 21069302 DOI: 10.1007/s00216-010-4321-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 10/03/2010] [Accepted: 10/10/2010] [Indexed: 12/23/2022]
Abstract
The aim of this study was to define the optimal pH for (1)H nuclear magnetic resonance (NMR) spectroscopy analysis of perchloric acid or methanol-chloroform-water extracts from brain tumor cells and tissues. The systematic study of the proton chemical shift variations as a function of pH of 13 brain metabolites in model solutions demonstrated that recording (1)H NMR spectra at pH 10 allowed resolving resonances that are overlapped at pH 7, especially in the 3.2-3.3 ppm choline-containing-compounds region. (1)H NMR analysis of extracts at pH 7 or 10 showed that quantitative measurements of lactate, alanine, glutamate, glutamine (Gln), creatine + phosphocreatine and myo-inositol (m-Ino) can be readily performed at both pHs. The concentrations of glycerophosphocholine, phosphocholine and choline that are crucial metabolites for tumor brain malignancy grading were accurately measured at pH 10 only. Indeed, the resonances of their trimethylammonium moieties are cleared of any overlapping signal, especially those of taurine (Tau) and phosphoethanolamine. The four non-ionizable Tau protons resonating as a singlet in a non-congested spectral region permits an easier and more accurate quantitation of this apoptosis marker at pH 10 than at pH 7 where the triplet at 3.43 ppm can be overlapped with the signals of glucose or have an intensity too low to be measured. Glycine concentration was determined indirectly at both pHs after subtracting the contribution of the overlapped signals of m-Ino at pH 7 or Gln at pH 10.
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Affiliation(s)
- O Robert
- UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique (SPCMIB), Groupe de RMN Biomédicale, Université de Toulouse, 118 route de Narbonne, 31062, Toulouse, Cedex 9, France
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Cherepanov AV, Glaubitz C, Schwalbe H. High-resolution studies of uniformly 13C,15N-labeled RNA by solid-state NMR spectroscopy. Angew Chem Int Ed Engl 2010; 49:4747-50. [PMID: 20533472 DOI: 10.1002/anie.200906885] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Alexey V Cherepanov
- Institute of Organic Chemistry and Chemical Biology, Center for Biomolecular Magnetic Resonance (BMRZ), Johann Wolfgang Goethe-Universität, 60438 Frankfurt, Germany
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14
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Magnetic resonance microscopy contribution to interpret high-resolution magic angle spinning metabolomic data of human tumor tissue. J Biomed Biotechnol 2010; 2011. [PMID: 20871822 PMCID: PMC2943122 DOI: 10.1155/2011/763684] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 07/16/2010] [Accepted: 08/03/2010] [Indexed: 11/17/2022] Open
Abstract
HRMAS NMR is considered a valuable technique to obtain detailed metabolic profile of unprocessed tissues. To properly interpret the HRMAS metabolomic results, detailed information of the actual state of the sample inside the rotor is needed. MRM (Magnetic Resonance Microscopy) was applied for obtaining structural and spatially localized metabolic information of the samples inside the HRMAS rotors. The tissue was observed stuck to the rotor wall under the effect of HRMAS spinning. MRM spectroscopy showed a transference of metabolites from the tissue to the medium. The sample shape and the metabolite transfer after HRMAS indicated that tissue had undergone alterations and it can not be strictly considered as intact. This must be considered when HRMAS is used for metabolic tissue characterization, and it is expected to be highly dependent on the manipulation of the sample. The localized spectroscopic information of MRM reveals the biochemical compartmentalization on tissue samples hidden in the HRMAS spectrum.
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Bathen TF, Sitter B, Sjøbakk TE, Tessem MB, Gribbestad IS. Magnetic resonance metabolomics of intact tissue: a biotechnological tool in cancer diagnostics and treatment evaluation. Cancer Res 2010; 70:6692-6. [PMID: 20699363 DOI: 10.1158/0008-5472.can-10-0437] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Personalized medicine is increasingly important in cancer treatment for its role in staging and its potential to improve stratification of patients. Different types of molecules, genes, proteins, and metabolites are being extensively explored as potential biomarkers. This review discusses the major findings and potential of tissue metabolites determined by high-resolution magic angle spinning magnetic resonance spectroscopy for cancer detection, characterization, and treatment monitoring.
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Affiliation(s)
- Tone F Bathen
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway.
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Tessem MB, Selnæs KM, Sjursen W, Tranø G, Giskeødegård GF, Bathen TF, Gribbestad IS, Hofsli E. Discrimination of Patients with Microsatellite Instability Colon Cancer using 1H HR MAS MR Spectroscopy and Chemometric Analysis. J Proteome Res 2010; 9:3664-70. [DOI: 10.1021/pr100176g] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- May-Britt Tessem
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway, Department of Laboratory Medicine Children’s and Women’s Health, NTNU, Trondheim, Norway, Department of Pathology and Medical Genetics, St. Olavs University Hospital, Trondheim, Norway, Department of Surgery, Levanger Hospital, Sykehuset Innherred, Levanger, Norway, and Department of Oncology, St. Olavs University Hospital, Trondheim, Norway
| | - Kirsten M. Selnæs
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway, Department of Laboratory Medicine Children’s and Women’s Health, NTNU, Trondheim, Norway, Department of Pathology and Medical Genetics, St. Olavs University Hospital, Trondheim, Norway, Department of Surgery, Levanger Hospital, Sykehuset Innherred, Levanger, Norway, and Department of Oncology, St. Olavs University Hospital, Trondheim, Norway
| | - Wenche Sjursen
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway, Department of Laboratory Medicine Children’s and Women’s Health, NTNU, Trondheim, Norway, Department of Pathology and Medical Genetics, St. Olavs University Hospital, Trondheim, Norway, Department of Surgery, Levanger Hospital, Sykehuset Innherred, Levanger, Norway, and Department of Oncology, St. Olavs University Hospital, Trondheim, Norway
| | - Gerd Tranø
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway, Department of Laboratory Medicine Children’s and Women’s Health, NTNU, Trondheim, Norway, Department of Pathology and Medical Genetics, St. Olavs University Hospital, Trondheim, Norway, Department of Surgery, Levanger Hospital, Sykehuset Innherred, Levanger, Norway, and Department of Oncology, St. Olavs University Hospital, Trondheim, Norway
| | - Guro F. Giskeødegård
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway, Department of Laboratory Medicine Children’s and Women’s Health, NTNU, Trondheim, Norway, Department of Pathology and Medical Genetics, St. Olavs University Hospital, Trondheim, Norway, Department of Surgery, Levanger Hospital, Sykehuset Innherred, Levanger, Norway, and Department of Oncology, St. Olavs University Hospital, Trondheim, Norway
| | - Tone F. Bathen
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway, Department of Laboratory Medicine Children’s and Women’s Health, NTNU, Trondheim, Norway, Department of Pathology and Medical Genetics, St. Olavs University Hospital, Trondheim, Norway, Department of Surgery, Levanger Hospital, Sykehuset Innherred, Levanger, Norway, and Department of Oncology, St. Olavs University Hospital, Trondheim, Norway
| | - Ingrid S. Gribbestad
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway, Department of Laboratory Medicine Children’s and Women’s Health, NTNU, Trondheim, Norway, Department of Pathology and Medical Genetics, St. Olavs University Hospital, Trondheim, Norway, Department of Surgery, Levanger Hospital, Sykehuset Innherred, Levanger, Norway, and Department of Oncology, St. Olavs University Hospital, Trondheim, Norway
| | - Eva Hofsli
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway, Department of Laboratory Medicine Children’s and Women’s Health, NTNU, Trondheim, Norway, Department of Pathology and Medical Genetics, St. Olavs University Hospital, Trondheim, Norway, Department of Surgery, Levanger Hospital, Sykehuset Innherred, Levanger, Norway, and Department of Oncology, St. Olavs University Hospital, Trondheim, Norway
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17
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Cherepanov A, Glaubitz C, Schwalbe H. Hochauflösende Festkörper-NMR-Spektroskopie an vollständig 13C,15N-markierter RNA. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200906885] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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18
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Giskeødegård GF, Grinde MT, Sitter B, Axelson DE, Lundgren S, Fjøsne HE, Dahl S, Gribbestad IS, Bathen TF. Multivariate modeling and prediction of breast cancer prognostic factors using MR metabolomics. J Proteome Res 2010; 9:972-9. [PMID: 19994911 DOI: 10.1021/pr9008783] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Axillary lymph node status together with estrogen and progesterone receptor status are important prognostic factors in breast cancer. In this study, the potential of using MR metabolomics for prediction of these prognostic factors was evaluated. Biopsies from breast cancer patients (n = 160) were excised during surgery and analyzed by high resolution magic angle spinning MR spectroscopy (HR MAS MRS). The spectral data were preprocessed and variable stability (VAST) scaled, and training and test sets were generated using the Kennard-Stone and SPXY sample selection algorithms. The data were analyzed by partial least-squares discriminant analysis (PLS-DA), probabilistic neural networks (PNNs) and Bayesian belief networks (BBNs), and blind samples (n = 50) were predicted for verification. Estrogen and progesterone receptor status was successfully predicted from the MR spectra, and were best predicted by PLS-DA with a correct classification of 44 of 50 and 39 of 50 samples, respectively. Lymph node status was best predicted by BBN with 34 of 50 samples correctly classified, indicating a relationship between metabolic profile and lymph node status. Thus, MR profiles contain prognostic information that may be of benefit in treatment planning, and MR metabolomics may become an important tool for diagnosis of breast cancer patients.
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Affiliation(s)
- Guro F Giskeødegård
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.
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19
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Abstract
Metabonomics is a new technology providing broad information about dynamic metabolic responses in living systems to pathophysiological stimuli or genetic modification. Nuclear magnetic resonance (NMR) spectroscopy is one of the most powerful methods in metabonomics; it is utilized to establish the metabolic profiles of biofluids, and is practically the only method capable of examining intact tissue samples. Experience with the application of metabonomics in eye research is still limited, yet this method provides the possibility of exploring metabolic processes in the eye in vivo. This article presents a brief background to the usefulness of metabonomics, and the possible applications of an NMR-based technique in eye research and clinical practice.
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Affiliation(s)
- Anna Midelfart
- Department of Ophthalmology, Faculty of Medicine, Institute of Neuroscience, Norwegian University of Science and Technology and University Hospital, Trondheim, Norway.
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20
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Solivera J, Cerdán S, Pascual JM, Barrios L, Roda JM. Assessment of 31P-NMR analysis of phospholipid profiles for potential differential diagnosis of human cerebral tumors. NMR IN BIOMEDICINE 2009; 22:663-674. [PMID: 19378301 DOI: 10.1002/nbm.1387] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We describe a novel protocol for the non-histological diagnosis of human brain tumors in vitro combining high-resolution (31)P magnetic resonance spectroscopy ((31)P-MRS) of their phospholipid profile and statistical multivariate analysis. Chloroform/methanol extracts from 40 biopsies of human intracranial tumors obtained during neurosurgical procedures were prepared and analyzed by high-resolution (31)P-MRS. The samples were grouped in the following seven major classes: normal brain (n = 3), low-grade astrocytomas (n = 4), high-grade astrocytomas (n = 7), meningiomas (n = 9), schwannomas (n = 3), pituitary adenomas (n = 4), and metastatic tumors (n = 4). The phospholipid profile of every biopsy was determined by (31)P-NMR analysis of its chloroform/methanol extract and characterized by 19 variables including 10 individual phospholipid contributions and 9 phospholipid ratios. Most tumors depicted a decrease in phosphatidylethanolamine (PtdEtn) and phosphatidylserine (PtdSer), the former mainly in neuroepithelial neoplasms and the latter in metastases. An increase in phosphatidylcholine (PtdCho) and phosphatidylinositol (PtdIns) appeared predominantly in primary non-neuroepithelial tumors. Linear discriminant analysis (LDA) revealed the optimal combination of variables that could classify each biopsy between every pair of classes. The resultant discriminant functions were used to calculate the probability of correct classifications for each individual biopsy within the seven classes considered. Multilateral analysis classified correctly 100% of the normal brain samples, 89% of the meningiomas, 75% of the metastases, and 57% of the high-grade astrocytomas. The use of phospholipid profiles may complement appropriately previously proposed methods of intelligent diagnosis of human cerebral tumors.
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Affiliation(s)
- Juan Solivera
- Department of Neurosurgery, Hospital Universitario Reina Sofía, Córdoba, Spain.
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21
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Righi V, Durante C, Cocchi M, Calabrese C, Di Febo G, Lecce F, Pisi A, Tugnoli V, Mucci A, Schenetti L. Discrimination of Healthy and Neoplastic Human Colon Tissues by ex Vivo HR-MAS NMR Spectroscopy and Chemometric Analyses. J Proteome Res 2009; 8:1859-69. [DOI: 10.1021/pr801094b] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Valeria Righi
- Dipartimento di Biochimica “G. Moruzzi”, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy, Dipartimento di Chimica, Università di Modena e Reggio Emilia, Via G. Campi 183, 41100 Modena, Italy, Dipartimento di Medicina Interna e Gastroenterologia, Università di Bologna, Via G. Massarenti 9, 40138, Bologna, Italy, Dipartimento Emergenza/Urgenza, Chirurgia Generale e dei Trapianti, Università di Bologna, Via G. Massarenti 9, 40138 Bologna, Italy, and DiSTA, Università di Bologna, Viale Fanin
| | - Caterina Durante
- Dipartimento di Biochimica “G. Moruzzi”, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy, Dipartimento di Chimica, Università di Modena e Reggio Emilia, Via G. Campi 183, 41100 Modena, Italy, Dipartimento di Medicina Interna e Gastroenterologia, Università di Bologna, Via G. Massarenti 9, 40138, Bologna, Italy, Dipartimento Emergenza/Urgenza, Chirurgia Generale e dei Trapianti, Università di Bologna, Via G. Massarenti 9, 40138 Bologna, Italy, and DiSTA, Università di Bologna, Viale Fanin
| | - Marina Cocchi
- Dipartimento di Biochimica “G. Moruzzi”, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy, Dipartimento di Chimica, Università di Modena e Reggio Emilia, Via G. Campi 183, 41100 Modena, Italy, Dipartimento di Medicina Interna e Gastroenterologia, Università di Bologna, Via G. Massarenti 9, 40138, Bologna, Italy, Dipartimento Emergenza/Urgenza, Chirurgia Generale e dei Trapianti, Università di Bologna, Via G. Massarenti 9, 40138 Bologna, Italy, and DiSTA, Università di Bologna, Viale Fanin
| | - Carlo Calabrese
- Dipartimento di Biochimica “G. Moruzzi”, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy, Dipartimento di Chimica, Università di Modena e Reggio Emilia, Via G. Campi 183, 41100 Modena, Italy, Dipartimento di Medicina Interna e Gastroenterologia, Università di Bologna, Via G. Massarenti 9, 40138, Bologna, Italy, Dipartimento Emergenza/Urgenza, Chirurgia Generale e dei Trapianti, Università di Bologna, Via G. Massarenti 9, 40138 Bologna, Italy, and DiSTA, Università di Bologna, Viale Fanin
| | - Giulio Di Febo
- Dipartimento di Biochimica “G. Moruzzi”, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy, Dipartimento di Chimica, Università di Modena e Reggio Emilia, Via G. Campi 183, 41100 Modena, Italy, Dipartimento di Medicina Interna e Gastroenterologia, Università di Bologna, Via G. Massarenti 9, 40138, Bologna, Italy, Dipartimento Emergenza/Urgenza, Chirurgia Generale e dei Trapianti, Università di Bologna, Via G. Massarenti 9, 40138 Bologna, Italy, and DiSTA, Università di Bologna, Viale Fanin
| | - Ferdinando Lecce
- Dipartimento di Biochimica “G. Moruzzi”, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy, Dipartimento di Chimica, Università di Modena e Reggio Emilia, Via G. Campi 183, 41100 Modena, Italy, Dipartimento di Medicina Interna e Gastroenterologia, Università di Bologna, Via G. Massarenti 9, 40138, Bologna, Italy, Dipartimento Emergenza/Urgenza, Chirurgia Generale e dei Trapianti, Università di Bologna, Via G. Massarenti 9, 40138 Bologna, Italy, and DiSTA, Università di Bologna, Viale Fanin
| | - Annamaria Pisi
- Dipartimento di Biochimica “G. Moruzzi”, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy, Dipartimento di Chimica, Università di Modena e Reggio Emilia, Via G. Campi 183, 41100 Modena, Italy, Dipartimento di Medicina Interna e Gastroenterologia, Università di Bologna, Via G. Massarenti 9, 40138, Bologna, Italy, Dipartimento Emergenza/Urgenza, Chirurgia Generale e dei Trapianti, Università di Bologna, Via G. Massarenti 9, 40138 Bologna, Italy, and DiSTA, Università di Bologna, Viale Fanin
| | - Vitaliano Tugnoli
- Dipartimento di Biochimica “G. Moruzzi”, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy, Dipartimento di Chimica, Università di Modena e Reggio Emilia, Via G. Campi 183, 41100 Modena, Italy, Dipartimento di Medicina Interna e Gastroenterologia, Università di Bologna, Via G. Massarenti 9, 40138, Bologna, Italy, Dipartimento Emergenza/Urgenza, Chirurgia Generale e dei Trapianti, Università di Bologna, Via G. Massarenti 9, 40138 Bologna, Italy, and DiSTA, Università di Bologna, Viale Fanin
| | - Adele Mucci
- Dipartimento di Biochimica “G. Moruzzi”, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy, Dipartimento di Chimica, Università di Modena e Reggio Emilia, Via G. Campi 183, 41100 Modena, Italy, Dipartimento di Medicina Interna e Gastroenterologia, Università di Bologna, Via G. Massarenti 9, 40138, Bologna, Italy, Dipartimento Emergenza/Urgenza, Chirurgia Generale e dei Trapianti, Università di Bologna, Via G. Massarenti 9, 40138 Bologna, Italy, and DiSTA, Università di Bologna, Viale Fanin
| | - Luisa Schenetti
- Dipartimento di Biochimica “G. Moruzzi”, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy, Dipartimento di Chimica, Università di Modena e Reggio Emilia, Via G. Campi 183, 41100 Modena, Italy, Dipartimento di Medicina Interna e Gastroenterologia, Università di Bologna, Via G. Massarenti 9, 40138, Bologna, Italy, Dipartimento Emergenza/Urgenza, Chirurgia Generale e dei Trapianti, Università di Bologna, Via G. Massarenti 9, 40138 Bologna, Italy, and DiSTA, Università di Bologna, Viale Fanin
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22
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Wilson M, Davies NP, Brundler MA, McConville C, Grundy RG, Peet AC. High resolution magic angle spinning 1H NMR of childhood brain and nervous system tumours. Mol Cancer 2009; 8:6. [PMID: 19208232 PMCID: PMC2651110 DOI: 10.1186/1476-4598-8-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2008] [Accepted: 02/10/2009] [Indexed: 11/10/2022] Open
Abstract
Background Brain and nervous system tumours are the most common solid cancers in children. Molecular characterisation of these tumours is important for providing novel biomarkers of disease and identifying molecular pathways which may provide putative targets for new therapies. 1H magic angle spinning NMR spectroscopy (1H HR-MAS) is a powerful tool for determining metabolite profiles from small pieces of intact tissue and could potentially provide important molecular information. Methods Forty tissue samples from 29 children with glial and primitive neuro-ectodermal tumours were analysed using HR-MAS (600 MHz Varian gHX nanoprobe). Tumour spectra were fitted to a library of individual metabolite spectra to provide metabolite values. These values were then used in a two tailed t-test and multi-variate analysis employing a principal component analysis and a linear discriminant analysis. Classification accuracy was estimated using a leave-one-out analysis and B632+ bootstrapping. Results Glial tumours had significantly (two tailed t-test p < 0.05) higher creatine and glutamine and lower taurine, phosphoethanolamine, phosphorylcholine and choline compared with primitive neuro-ectodermal tumours. Classification accuracy was 90%. Medulloblastomas (n = 9) had significantly (two tailed t-test p < 0.05) higher creatine, glutamine, phosphorylcholine, glycine and scyllo-inositol than neuroblastomas (n = 7), classification accuracy was 94%. Supratentorial primitive neuro-ectodermal tumours had metabolite profiles in keeping with other primitive neuro-ectodermal tumours whilst ependymomas (n = 2) had metabolite profiles intermediate between pilocytic astrocytomas (n = 10) and primitive neuro-ectodermal tumours. Conclusion HR-MAS identified key differences in the metabolite profiles of childhood brain and nervous system improving the molecular characterisation of these tumours. Further investigation of the underlying molecular pathways is required to assess their potential as targets for new agents.
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Affiliation(s)
- Martin Wilson
- Cancer Sciences, University of Birmingham, Birmingham, UK.
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23
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Wilson M, Davies NP, Grundy RG, Peet AC. A quantitative comparison of metabolite signals as detected by in vivo MRS with ex vivo 1H HR-MAS for childhood brain tumours. NMR IN BIOMEDICINE 2009; 22:213-219. [PMID: 19067434 DOI: 10.1002/nbm.1306] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
(1)H MRS provides a powerful method for investigating tumour metabolism by allowing the measurement of metabolites in vivo. Recently, the technique of (1)H high-resolution magic angle spinning (HR-MAS) has been shown to produce high-quality data, allowing the accurate measurement of many metabolites present in unprocessed biopsy tissue. The purpose of this study was to evaluate the agreement between the techniques of in vivo MRS and ex vivo HR-MAS for investigating childhood brain tumours. Short-TE (30 ms), single-voxel, in vivo MRS was performed on 16 paediatric patients with brain tumours at 1.5 T. A frozen biopsy sample was available for each patient. HR-MAS was performed on the biopsy samples, and metabolite quantities were determined from the MRS and HR-MAS data using the LCModel and TARQUIN algorithms, respectively. Linear regression was performed on the metabolite quantities to asses the agreement between MRS and HR-MAS. Eight of the 12 metabolite quantities were found to correlate significantly (P < 0.05). The four worst correlating metabolites were aspartate, scyllo-inositol, glycerophosphocholine and N-acetylaspartate, and, except for glycerophosphocholine, this error was reflected in their higher Cramer-Rao lower bounds (CRLBs), suggesting that low signal-to-noise was the greatest source of error for these metabolites. Glycerophosphocholine had a lower CRLB implying that interference with phosphocholine and choline was the most significant source of error. The generally good agreement observed between the two techniques suggests that both MRS and HR-MAS can be used to reliably estimate metabolite quantities in brain tumour tissue and that tumour heterogeneity and metabolite degradation do not have an important effect on the HR-MAS metabolite profile for the tumours investigated. HR-MAS can be used to improve the analysis and understanding of MRS data.
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Affiliation(s)
- Martin Wilson
- Academic Department of Paediatrics and Child Health, University of Birmingham, UK.
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24
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Gowda GAN, Zhang S, Gu H, Asiago V, Shanaiah N, Raftery D. Metabolomics-based methods for early disease diagnostics. Expert Rev Mol Diagn 2009; 8:617-33. [PMID: 18785810 DOI: 10.1586/14737159.8.5.617] [Citation(s) in RCA: 450] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The emerging field of metabolomics, in which a large number of small-molecule metabolites from body fluids or tissues are detected quantitatively in a single step, promises immense potential for early diagnosis, therapy monitoring and for understanding the pathogenesis of many diseases. Metabolomics methods are mostly focused on the information-rich analytical techniques of NMR spectroscopy and mass spectrometry (MS). Analysis of the data from these high-resolution methods using advanced chemometric approaches provides a powerful platform for translational and clinical research and diagnostic applications. In this review, the current trends and recent advances in NMR- and MS-based metabolomics are described with a focus on the development of advanced NMR and MS methods, improved multivariate statistical data analysis and recent applications in the area of cancer, diabetes, inborn errors of metabolism and cardiovascular diseases.
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Affiliation(s)
- G A Nagana Gowda
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA.
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25
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Seierstad T, Røe K, Sitter B, Halgunset J, Flatmark K, Ree AH, Olsen DR, Gribbestad IS, Bathen TF. Principal component analysis for the comparison of metabolic profiles from human rectal cancer biopsies and colorectal xenografts using high-resolution magic angle spinning 1H magnetic resonance spectroscopy. Mol Cancer 2008; 7:33. [PMID: 18439252 PMCID: PMC2377266 DOI: 10.1186/1476-4598-7-33] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2007] [Accepted: 04/25/2008] [Indexed: 11/21/2022] Open
Abstract
Background This study was conducted in order to elucidate metabolic differences between human rectal cancer biopsies and colorectal HT29, HCT116 and SW620 xenografts by using high-resolution magnetic angle spinning (MAS) magnetic resonance spectroscopy (MRS) and for determination of the most appropriate human rectal xenograft model for preclinical MR spectroscopy studies. A further aim was to investigate metabolic changes following irradiation of HT29 xenografts. Methods HR MAS MRS of tissue samples from xenografts and rectal biopsies were obtained with a Bruker Avance DRX600 spectrometer and analyzed using principal component analysis (PCA) and partial least square (PLS) regression analysis. Results and conclusion HR MAS MRS enabled assignment of 27 metabolites. Score plots from PCA of spin-echo and single-pulse spectra revealed separate clusters of the different xenografts and rectal biopsies, reflecting underlying differences in metabolite composition. The loading profile indicated that clustering was mainly based on differences in relative amounts of lipids, lactate and choline-containing compounds, with HT29 exhibiting the metabolic profile most similar to human rectal cancers tissue. Due to high necrotic fractions in the HT29 xenografts, radiation-induced changes were not detected when comparing spectra from untreated and irradiated HT29 xenografts. However, PLS calibration relating spectral data to the necrotic fraction revealed a significant correlation, indicating that necrotic fraction can be assessed from the MR spectra.
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Affiliation(s)
- Therese Seierstad
- Department of Medical Physics, Rikshospitalet-Radiumhospitalet Medical Center, 0310 Oslo, Norway.
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