Hua Zhao1, Jie Shen2, Steven C Moore3, Yuanqing Ye2, Xifeng Wu2, Francisco J Esteva4, Debasish Tripathy5, Wong-Ho Chow2. 1. Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA. hzhao2@mdanderson.org. 2. Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA. 3. Divisions of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, 20892, USA. 4. Perlmutter Cancer Center at New York University Langone Health, New York, NY, 10016, USA. 5. Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, 1155 Pressler Street, racial Houston, TX, 77030, USA.
Abstract
PURPOSE: The metabolic etiology of breast cancer has been explored in the past several years using metabolomics. However, most of these studies only included non-Hispanic White individuals. METHODS: To fill this gap, we performed a two-step (discovery and validation) metabolomics profiling in plasma samples from 358 breast cancer patients and 138 healthy controls. All study subjects were either Hispanics or non-Hispanic African Americans. RESULTS: A panel of 14 identified metabolites significantly differed between breast cancer cases and healthy controls in both the discovery and validation sets. Most of these identified metabolites were lipids. In the pathway analysis, citrate cycle (TCA cycle), arginine and proline metabolism, and linoleic acid metabolism pathways were observed, and they significantly differed between breast cancer cases and healthy controls in both sets. From those 14 metabolites, we selected 9 non-correlated metabolites to generate a metabolic risk score. Increased metabolites risk score was associated with a 1.87- and 1.63-fold increased risk of breast cancer in the discovery and validation sets, respectively (Odds ratio (OR) 1.87, 95% Confidence interval (CI) 1.50, 2.32; OR 1.63, 95% CI 1.36, 1.95). CONCLUSIONS: In summary, our study identified metabolic profiles and pathways that significantly differed between breast cancer cases and healthy controls in Hispanic or non-Hispanic African American women. The results from our study might provide new insights on the metabolic etiology of breast cancer.
PURPOSE: The metabolic etiology of breast cancer has been explored in the past several years using metabolomics. However, most of these studies only included non-Hispanic White individuals. METHODS: To fill this gap, we performed a two-step (discovery and validation) metabolomics profiling in plasma samples from 358 breast cancerpatients and 138 healthy controls. All study subjects were either Hispanics or non-Hispanic African Americans. RESULTS: A panel of 14 identified metabolites significantly differed between breast cancer cases and healthy controls in both the discovery and validation sets. Most of these identified metabolites were lipids. In the pathway analysis, citrate cycle (TCA cycle), arginine and proline metabolism, and linoleic acid metabolism pathways were observed, and they significantly differed between breast cancer cases and healthy controls in both sets. From those 14 metabolites, we selected 9 non-correlated metabolites to generate a metabolic risk score. Increased metabolites risk score was associated with a 1.87- and 1.63-fold increased risk of breast cancer in the discovery and validation sets, respectively (Odds ratio (OR) 1.87, 95% Confidence interval (CI) 1.50, 2.32; OR 1.63, 95% CI 1.36, 1.95). CONCLUSIONS: In summary, our study identified metabolic profiles and pathways that significantly differed between breast cancer cases and healthy controls in Hispanic or non-Hispanic African American women. The results from our study might provide new insights on the metabolic etiology of breast cancer.
Entities:
Keywords:
Breast cancer; Metabolomics; Racial minority
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