Association Between Plasma Diacetylspermine and Tumor Spermine Synthase With Outcome in Triple-Negative Breast Cancer.

Abstract

BACKGROUND:

MYC is an oncogenic driver of development and progression in triple-negative breast cancer (TNBC). Ornithine decarboxylase, the rate-limiting enzyme in polyamine metabolism, is a transcriptional target of MYC. We therefore hypothesized that a plasma polyamine signature may be predictive of TNBC development and progression.

METHODS:

Using liquid chromatography mass spectrometry, polyamine levels were determined in plasma samples from newly diagnosed patients with TNBC (n = 87) and cancer-free controls (n = 115). Findings were validated in plasma samples from an independent prospective cohort of 54 TNBC, 55 estrogen receptor negative (ER-) and progesterone receptor negative (PR-) and HER2 positive (HER2+), and 73 ER+ case patients, and 30 cancer-free control subjects. Gene expression data and clinical data for 921 and 2359 breast cancer tumors were obtained from The Cancer Genome Atlas repository and the Oncomine database, respectively. Relationships between plasma diacetylspermine (DAS) and tumor spermine synthase (SMS) mRNA expression with metastasis-free survival and overall survival were determined using Cox proportional hazard models; Fisher exact tests were used to assess risk of distant metastasis in relation to tumor SMS mRNA expression.

RESULTS:

An increase in plasma DAS, a catabolic product of spermine mediated through SMS, was observed in the TNBC subtype of breast cancer. Plasma levels of DAS in TNBC associated with increased risk of metastasis (plasma DAS value ≥ 1.16, hazard ratio = 3.06, 95% confidence interval [CI] = 1.15 to 8.13, two-sided P = .03). SMS mRNA expression in TNBC tumor tissue was also found to be predictive of poor overall survival (top 25th percentile hazard ratio = 2.06, 95% CI = 1.04 to 4.08, one-sided P = .04) and increased risk of distant metastasis in TNBC (comparison of lowest SMS quartile [reference] to highest SMS quartile relative risk = 1.90, 95% CI = 0.97 to 4.06, one-sided Fisher exact test P=.03).

CONCLUSIONS:

Metabolomic profiling identified plasma DAS as a predictive marker for TNBC progression and metastasis.

• Authors: Johannes F Fahrmann, Jody Vykoukal, Alia Fleury, Satyendra Tripathi, Jennifer B Dennison, Eunice Murage, Peng Wang, Chuan-Yih Yu, Michela Capello, Chad J Creighton, Kim-Anh Do, James P Long, Ehsan Irajizad, Christine Peterson, Hiroyuki Katayama, Mary L Disis, Banu Arun, Samir Hanash
• Journal: Journal of the National Cancer Institute (J Natl Cancer Inst) Vol. 112 Issue 6 Pg. 607-616 (06 01 2020) ISSN: 1460-2105 [Electronic] United States
• PMID: 31503278 (Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
• Copyright: © The Author(s) 2019. Published by Oxford University Press. All rights reserved. For permissions, please email: [email protected].

Chemical References

• Spermine
• N',N''-diacetylspermine
• Spermine Synthase

Topics

• Animals
• Chromatography, Liquid
• Female
• Gene Expression
• Humans
• Mice
• Mice, Transgenic
• Neoplasm Metastasis
• Neoplasm Staging
• Prognosis
• Spermine (analogs & derivatives, biosynthesis, blood)
• Spermine Synthase (biosynthesis, blood, genetics, immunology)
• Tandem Mass Spectrometry
• Triple Negative Breast Neoplasms (blood, genetics, immunology, pathology)