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Metabolic relevance for N-hydroxy l-arginine reduction in estrogen-negative breast cancer cells

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A Correction to this article was published on 17 November 2018

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Abstract

We had shown Nw-hydroxy-l-arginine (NOHA) as a promising blood-based biomarker for estrogen-receptor-negative (ER) breast cancer (BC) that differentiates ER BC based on grade and molecular phenotype. In this in vitro study, we assessed the metabolic relevance for ER BC-specific NOHA modulation and correlated them with NOHA regulatory responses. This study aids future NOHA clinical utility in ER BC diagnosis and therapy management and would prove useful for potential drug discovery and development process.

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Fig. 1
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Change history

  • 17 November 2018

    We found a unit error with our LC–MS lower limit of quantitation (LLOQ) measurement in the Amino Acids Journal

  • 17 November 2018

    We found a unit error with our LC���MS lower limit of quantitation (LLOQ) measurement in the Amino Acids Journal

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Acknowledgements

The University of New England office of research and scholarship, and the college of Pharmacy provided funding support to this study.

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Correspondence to Srinidi Mohan.

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Conflict of interest

As the authors of this manuscript, we declare no conflict of interest; either financial or otherwise.

Research involving human participants and/or animals

No human participants or animal model were involved with this project, thus exempting this study from animal/human approval process.

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No patient samples or bio-bank samples were used for this study, thus exempting informed consent requirement.

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Handling Editor: G. J. Peters.

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726_2018_2603_MOESM1_ESM.jpg

Supplemental Fig. 1. NOHA NOS2 and NO measurement of 3D spheroids cultured in medium containing 0.3 mM l-Lysine over 10 weeks. Each of the 6 distinct ER– BC cultured as 3D spheroids in medium containing 0.3 mM l-Lysine were monitored at the end of weeks 2, 6, and 10 for (A) NOHA in culture medium, (B) cellular NOHA, (C) cellular NOS2 expression, and (D) cellular NO production, as total nitrite, at n = 6. (JPEG 245 kb)

726_2018_2603_MOESM2_ESM.jpg

Supplemental Fig. 2. Arginase and CAT measurement of 3D spheroids cultured in medium containing 0.3 mM l-Lysine over 10 weeks. Each of the 6 distinct ER– BC cultured as 3D spheroids in medium containing 0.3 mM l-Lysine were monitored at the end of weeks 2, 6, and 10 for (A) cellular Arginase expression, (B) cellular Arginase activity, (C) CAT 1 expression, and (D) CAT 2 expression, at n = 6. (JPEG 265 kb)

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Mohan, S., Patel, S., Greenstein, I. et al. Metabolic relevance for N-hydroxy l-arginine reduction in estrogen-negative breast cancer cells. Amino Acids 50, 1629–1636 (2018). https://doi.org/10.1007/s00726-018-2603-x

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  • DOI: https://doi.org/10.1007/s00726-018-2603-x

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