In vivo 1H MRS detection of cystathionine in human brain tumors

Francesca Branzoli, Dinesh K Deelchand, Marc Sanson, Stéphane Lehéricy, Malgorzata Marjanska

Research output: Contribution to journalArticle

Abstract

Purpose: To report the technical aspects of noninvasive detection of cystathionine in human brain glioma with edited MRS, and to investigate possible further acquisition improvements for robust quantification of this metabolite. Methods: In vivo 1H MR spectra were acquired at 3 T in 15 participants with an isocitrate dehydrogenase-mutated glioma using a MEGA-PRESS (MEscher GArwood point resolved spectroscopy) sequence previously employed for 2-hydroxyglutarate detection (TR = 2 s, TE = 68 ms). The editing pulse was applied at 1.9 ppm for the edit-on condition and at 7.5 ppm for the edit-off condition. To evaluate the editing efficiency, spectra were acquired in 1 participant by placing the editing pulse for the edit-on condition at 1.9, 2.03, and 2.16 ppm. Cystathionine concentration was quantified using LCModel and a simulated basis set. To confirm chemical shifts and J-coupling values of cystathionine, the 1H NMR cystathionine spectrum was measured using a high-resolution 500 MHz spectrometer. Results: In 12 gliomas, cystathionine was observed in the in vivo edited MR spectra at 2.72 and 3.85 ppm and quantified. The signal intensity of the cystathionine resonance at 2.72 ppm increased 1.7 and 2.13 times when the editing pulse was moved to 2.03 and 2.16 ppm, respectively. Cystathionine was not detectable in normal brain tissue. Conclusion: Cystathionine can be detected in vivo by edited MRS using the same protocol as for 2-hydroxyglutarate detection. This finding may enable a more accurate, noninvasive investigation of cellular metabolism in glioma.

Original languageEnglish (US)
Pages (from-to)1259-1265
Number of pages7
JournalMagnetic resonance in medicine
Volume82
Issue number4
DOIs
StatePublished - Oct 1 2019

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Cystathionine
Brain Neoplasms
Glioma
Isocitrate Dehydrogenase
Proton Magnetic Resonance Spectroscopy
Brain
Spectrum Analysis

Keywords

  • 2-hydroxyglutarate
  • MEGA-PRESS
  • brain glioma
  • cystathionine
  • editing

PubMed: MeSH publication types

  • Journal Article

Cite this

In vivo 1H MRS detection of cystathionine in human brain tumors. / Branzoli, Francesca; Deelchand, Dinesh K; Sanson, Marc; Lehéricy, Stéphane; Marjanska, Malgorzata.

In: Magnetic resonance in medicine, Vol. 82, No. 4, 01.10.2019, p. 1259-1265.

Research output: Contribution to journalArticle

Branzoli, Francesca ; Deelchand, Dinesh K ; Sanson, Marc ; Lehéricy, Stéphane ; Marjanska, Malgorzata. / In vivo 1H MRS detection of cystathionine in human brain tumors. In: Magnetic resonance in medicine. 2019 ; Vol. 82, No. 4. pp. 1259-1265.
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abstract = "Purpose: To report the technical aspects of noninvasive detection of cystathionine in human brain glioma with edited MRS, and to investigate possible further acquisition improvements for robust quantification of this metabolite. Methods: In vivo 1H MR spectra were acquired at 3 T in 15 participants with an isocitrate dehydrogenase-mutated glioma using a MEGA-PRESS (MEscher GArwood point resolved spectroscopy) sequence previously employed for 2-hydroxyglutarate detection (TR = 2 s, TE = 68 ms). The editing pulse was applied at 1.9 ppm for the edit-on condition and at 7.5 ppm for the edit-off condition. To evaluate the editing efficiency, spectra were acquired in 1 participant by placing the editing pulse for the edit-on condition at 1.9, 2.03, and 2.16 ppm. Cystathionine concentration was quantified using LCModel and a simulated basis set. To confirm chemical shifts and J-coupling values of cystathionine, the 1H NMR cystathionine spectrum was measured using a high-resolution 500 MHz spectrometer. Results: In 12 gliomas, cystathionine was observed in the in vivo edited MR spectra at 2.72 and 3.85 ppm and quantified. The signal intensity of the cystathionine resonance at 2.72 ppm increased 1.7 and 2.13 times when the editing pulse was moved to 2.03 and 2.16 ppm, respectively. Cystathionine was not detectable in normal brain tissue. Conclusion: Cystathionine can be detected in vivo by edited MRS using the same protocol as for 2-hydroxyglutarate detection. This finding may enable a more accurate, noninvasive investigation of cellular metabolism in glioma.",
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