Grading of endometrial cancer using 1H HR-MAS NMR-based metabolomics

AbstractThe tissue metabolomic characteristics associated with endometrial cancer (EC) at different grades were studied using high resolution (400 MHz) magic angle spinning (HR-MAS) proton spectroscopy. The metabolic profiles were obtained from 64 patients (14 with grade 1 (G1), 33 with grade 2 (G2) and 17 with grade 3 (G3) tumors) and compared with the profile acquired from 10 patients with the benign disorders. OPLS-DA revealed increased valine, isoleucine, leucine, hypotaurine, serine, lysine, ethanolamine, choline and decreased creatine, creatinine, glutathione, ascorbate, glutamate, phosphoethanolamine and scyllo-inositol in all EC grades in reference to the non-transformed tissue. The increased levels of taurine was additionally detected in the G1 and G2 tumors in comparison to the control tissue, while the elevated glycine, N-acetyl compound and lactate—in the G1 and G3 tumors. The metabolic features typical for the G1 tumors are the increased dimethyl sulfone, phosphocholine, and decreased glycerophosphocholine and glutamine levels, while the decreased myo-inositol level is characteristic for the G2 and G3 tumors. The elevated 3-hydroxybutyrate, alanine and betaine levels were observed in the G3 tumors. The differences between the grade G1 and G3 malignances were mainly related to the perturbations of phosphoethanolamine and phosphocholine biosynthesis, inositol, betaine, serine and glycine metabolism. The statistical significance of the OPLS-DA modeling was also verified by an univariate analysis. HR-MAS NMR based metabolomics provides an useful insight into the metabolic reprogramming in endometrial cancer.

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Combination of solid state NMR and DFT calculation to elucidate the state of sodium in hard carbon electrodes

Journal of Materials Chemistry A ◽

10.1039/c6ta04273b ◽

2016 ◽

Vol 4 (34) ◽

pp. 13183-13193 ◽

Cited By ~ 31

Author(s):

Ryohei Morita ◽

Kazuma Gotoh ◽

Mika Fukunishi ◽

Kei Kubota ◽

Shinichi Komaba ◽

...

Keyword(s):

Solid State ◽

Solid State Nmr ◽

Dft Calculation ◽

Magic Angle Spinning ◽

The State ◽

Mas Nmr ◽

Magic Angle ◽

Multiple Quantum ◽

Hard Carbon ◽

Angle Spinning

We examined the state of sodium electrochemically inserted in HC prepared at 700–2000 °C using solid state Na magic angle spinning (MAS) NMR and multiple quantum (MQ) MAS NMR.

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Sampling Method Affects HR-MAS NMR Spectra of Healthy Caprine Brain Biopsies

Metabolites ◽

10.3390/metabo11010038 ◽

2021 ◽

Vol 11 (1) ◽

pp. 38

Author(s):

Annakatrin Häni ◽

Gaëlle Diserens ◽

Anna Oevermann ◽

Peter Vermathen ◽

Christina Precht

Keyword(s):

Nmr Spectroscopy ◽

Sampling Method ◽

Magic Angle Spinning ◽

Mas Nmr ◽

Magic Angle ◽

1H Nuclear Magnetic Resonance ◽

Rapid Changes ◽

Tissue Degradation ◽

Angle Spinning

The metabolic profiling of tissue biopsies using high-resolution–magic angle spinning (HR-MAS) 1H nuclear magnetic resonance (NMR) spectroscopy may be influenced by experimental factors such as the sampling method. Therefore, we compared the effects of two different sampling methods on the metabolome of brain tissue obtained from the brainstem and thalamus of healthy goats by 1H HR-MAS NMR spectroscopy—in vivo-harvested biopsy by a minimally invasive stereotactic approach compared with postmortem-harvested sample by dissection with a scalpel. Lactate and creatine were elevated, and choline-containing compounds were altered in the postmortem compared to the in vivo-harvested samples, demonstrating rapid changes most likely due to sample ischemia. In addition, in the brainstem samples acetate and inositols, and in the thalamus samples ƴ-aminobutyric acid, were relatively increased postmortem, demonstrating regional differences in tissue degradation. In conclusion, in vivo-harvested brain biopsies show different metabolic alterations compared to postmortem-harvested samples, reflecting less tissue degradation. Sampling method and brain region should be taken into account in the analysis of metabolic profiles. To be as close as possible to the actual situation in the living individual, it is desirable to use brain samples obtained by stereotactic biopsy whenever possible.

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Basic Principles and Recent Results of H Magic-Angle-Spinning and Pulsed Field Gradient Nuclear Magnetic Resonance Studies on Zeolites11'H Mas Nmr Studies on Dehydrated Zeolites

Studies in Surface Science and Catalysis - Proceedings of ZEOCAT 90 ◽

10.1016/s0167-2991(08)62901-8 ◽

1991 ◽

pp. 89-115 ◽

Cited By ~ 23

Author(s):

H. Pfeifer ◽

D. Freude ◽

J. Kärger

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Magic Angle Spinning ◽

Mas Nmr ◽

Magic Angle ◽

Nmr Studies ◽

Basic Principles ◽

Magnetic Resonance Studies ◽

Pulsed Field ◽

Angle Spinning

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An insight into the structure of foods using 13C and 1H magic angle spinning (MAS) NMR: Application to wheat dough

Magnetic Resonance in Food Science - Special Publications ◽

10.1039/9781847551252-00043 ◽

2007 ◽

pp. 43-53

Author(s):

E. Alberti ◽

D. Santos

Keyword(s):

Magic Angle Spinning ◽

Mas Nmr ◽

Magic Angle ◽

Wheat Dough ◽

Angle Spinning ◽

Insight Into

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Cross Polarization/Magic Angle Spinning Nuclear Magnetic Resonance (CP/MAS NMR) Spectroscopy

Methods in Lignin Chemistry - Springer Series in Wood Science ◽

10.1007/978-3-642-74065-7_11 ◽

1992 ◽

pp. 146-161 ◽

Cited By ~ 18

Author(s):

G. J. Leary ◽

R. H. Newman

Keyword(s):

Nuclear Magnetic Resonance ◽

Nmr Spectroscopy ◽

Magnetic Resonance ◽

Magic Angle Spinning ◽

Mas Nmr ◽

Magic Angle ◽

Cross Polarization ◽

Angle Spinning ◽

Cp Mas Nmr ◽

Nuclear Magnetic

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Article

Canadian Journal of Chemistry ◽

10.1139/v99-181 ◽

1999 ◽

Vol 77 (11) ◽

pp. 1962-1972

Author(s):

Scott Kroeker ◽

Roderick E Wasylishen

Keyword(s):

Nmr Spectra ◽

Magic Angle Spinning ◽

Mas Nmr ◽

Spin Coupling ◽

Group Symmetry ◽

Magic Angle ◽

Chemical Shielding ◽

Shielding Tensor ◽

Angle Spinning ◽

Spin Spin Coupling

Direct NMR observation of copper-63/65 nuclei in solid K3Cu(CN)4 provides the first experimental example of anisotropic copper chemical shielding. Axially symmetric by virtue of the space group symmetry, the shielding tensor spans 42 ppm, with the greatest shielding when the unique axis is perpendicular to the applied magnetic field. The nuclear quadrupole coupling constant is also appreciable, CQ(63Cu) = -1.125 MHz, reflecting a deviation of the Cu(CN)43- anion from pure tetrahedral symmetry. Spin-spin coupling to 13C nuclei in an isotopically enriched sample is quantified by line-shape simulations of both 13C and 63/65Cu magic-angle spinning (MAS) NMR spectra to be 300 Hz. It is shown that this information is also directly available by 63/65Cu triple-quantum (3Q) MAS NMR. The relative merits of these three approaches to characterizing spin-spin couplings involving half-integer quadrupolar nuclei are discussed. Chemical shielding tensors for nitrogen-15 and carbon-13 are obtained from NMR spectra of non-spinning samples, and are compared to those of tetrahedral group 12 tetracyanometallates. Finally, 2J(63/65Cu,15N) detected in 15N MAS experiments are found to be 19 and 20 Hz for the two crystallographically distinct cyanide ligands.Key words: NMR, quadrupolar nucleus, chemical shielding tensor, multiple-quantum magic-angle spinning, metal cyanide, spin-spin coupling.

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