Effects of Doxorubicin, Cisplatin, and Tamoxifen on the Metabolic Profile of Human Breast Cancer MCF-7 Cells As Determined by H-1 High-Resolution Magic Angle Spinning Nuclear Magnetic Resonance

Autor(es)

Maria, Roberta M. ; Altei, Wanessa F. ; Selistre-de-Araujo, Heloisa S. ; Colnago, Luiz A.

• Tipo de documento: Artigo Científico
• Fonte: BIOCHEMISTRY; v. 56, n. 16, p. 2219-2224, APR 25 2017.
• Citações Web of Science: 3

Resumo

Doxorubicin (Doxo), cisplatin (Cis), and tamoxifen, (Tamo) are part of many chemotherapeutic regimens. However, there have been limited studies of the way metabolism in breast cancer is affected by chemotherapy. We studied, through H-1 high-resolution magic angle spinning nuclear magnetic resonance (HR-MAS NMR) spectroscopy, the metabolic profile of human breast cancer MCF-7 control (Con) cells as well as MCF-7 cells treated with Tamo, Cis, and Doxo. H-1 HR-MAS NMR Single-pulse spectra evidenced signals from the cell compounds, including fatty acids (membranes), water-soluble proteins, and metabolites: The spectra showed that phosphocholine biomarker of breast cancer malignant transformation) signals were stronger in Con than in-treated cells. Betaine (i.e., the major osmolyte in cells) was Observed at similar concentrations in MCF-7 control and treated cells but was absent in nontumor MCF-10A cells. The NMR. spectra acquired with the Carr-Purcell-Meiboom-Gill (CPMG) pulse sequence were used only in qualitative analyses-because the Signal areas were attenuated according to their transverse relaxation time (T-2). The CPMG method was used to identify soluble metabolites such as organic, acids, amino acids, Choline and its derivatives, taurine; and guanidine) acetate. H-1 HR-MAS NMR spectroscopy efficiently demonstrated the effects of Tame); Cis, and Doxo on the metabolic profile of MCF-7 cells. The fatty acid, phosphocholine, and choline variations observed by single-pulse HR-MAS NMR have the potential, to characterize both responder and nonresponder tumors at a molecular level. (AU)

• Processo FAPESP: 13/00798-2 - A matriz extracelular no envelhecimento, no exercício e no microambiente tumoral
• Beneficiário: Heloisa Sobreiro Selistre de Araújo
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/05128-5 - Investigação do perfil metabólico de células de câncer de mama submetidas à quimioterapia através da técnica de ressonância magnética nuclear.
• Beneficiário: Roberta Manzano Maria
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado