Abstract
Branched Chain Amino Acids (BCAAs) are related to different aspects of diseases like pathogenesis, diagnosis and even prognosis. While in some diseases, levels of all the BCAAs are perturbed; in some cases, perturbation occurs in one or two while the rest remain unaltered. In case of ischemic heart disease, there is an enhanced level of plasma leucine and isoleucine but valine level remains unaltered. In ‘Hypervalinemia’, valine is elevated in serum and urine, but not leucine and isoleucine. Therefore, identification of these metabolites and profiling of individual BCAA in a quantitative manner in body-fluid like blood plasma/serum have long been in demand. 1H NMR resonances of the BCAAs overlap with each other which complicates quantification of individual BCAAs. Further, the situation is limited by the overlap of broad resonances of lipoprotein with the resonances of BCAAs. The widely used commercially available kits cannot differentially estimate the BCAAs. Here, we have achieved proper identification and characterization of these BCAAs in serum in a quantitative manner employing a Nuclear Magnetic Resonance-based technique namely T2-edited Correlation Spectroscopy (COSY). This approach can easily be extended to other body fluids like bile, follicular fluids, saliva, etc.
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Acknowledgments
The financial support by DST and TIFR is gratefully acknowledged. KC acknowledges DST Inspire Faculty fellowship for providing financial support. AS acknowledges Council of Scientific and Industrial Research, Government of India for providing SPM Fellowship. KC acknowledges the NMR facility provided by TIFR, Mumbai and JKU, Linz.
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Handling Editor: D. Tsikas.
S. Ghosh and A. Sengupta are equally contributed to this work.
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Ghosh, S., Sengupta, A. & Chandra, K. Quantitative metabolic profiling of NMR spectral signatures of branched chain amino acids in blood serum. Amino Acids 47, 2229–2236 (2015). https://doi.org/10.1007/s00726-015-1994-1
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DOI: https://doi.org/10.1007/s00726-015-1994-1