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A time-course Raman spectroscopic analysis of spontaneous in vitro microcalcifications in a breast cancer cell line

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posted on 05.08.2021, 10:15 by Pascaline Bouzy, Shane O’Grady, Honey Madupalli, Mary Tecklenburg, Keith Rogers, Francesca Palombo, Maria MorganMaria Morgan, Nicholas Stone
Microcalcifications are early markers of breast cancer and can provide valuable prognostic information to support clinical decision-making. Current detection of calcifications in breast tissue is based on X-ray mammography, which involves the use of ionizing radiation with potentially detrimental effects, or MRI scans, which have limited spatial resolution. Additionally, these techniques are not capable of discriminating between microcalcifications from benign and malignant lesions. Several studies show that vibrational spectroscopic techniques are capable of discriminating and classifying breast lesions, with a pathology grade based on the chemical composition of the microcalcifications. However, the occurrence of microcalcifications in the breast and the underlying mineralization process are still not fully understood. Using a previously established model of in vitro mineralization, the MDA-MB-231 human breast cancer cell line was induced using two osteogenic agents, inorganic phosphate (Pi) and β-glycerophosphate (βG), and direct monitoring of the mineralization process was conducted using Raman micro-spectroscopy. MDA-MB-231 cells cultured in a medium supplemented with Pi presented more rapid mineralization (by day 3) than cells exposed to βG (by day 11). A redshift of the phosphate stretching peak for cells supplemented with βG revealed the presence of different precursor phases (octacalcium phosphate) during apatite crystal formation. These results demonstrate that Raman micro-spectroscopy is a powerful tool for nondestructive analysis of mineral species and can provide valuable information for evaluating mineralization dynamics and any associated breast cancer progression, if utilized in pathological samples.

Funding

European Union Horizon 2020 Research and Innovation programme under the Grant Agreement No. 642661

Medical Research Council [grant number MR/T000406/1]

History

Comments

The original article is available at https://www.nature.com

Published Citation

Bouzy P, et al. A time-course Raman spectroscopic analysis of spontaneous in vitro microcalcifications in a breast cancer cell line. Lab Invest. 2021.

Publication Date

11 June 2021

PubMed ID

34117364

Department/Unit

  • School of Pharmacy and Biomolecular Sciences

Research Area

  • Biomaterials and Regenerative Medicine
  • Cancer
  • Health Professions Education

Publisher

Springer Nature

Version

  • Published Version (Version of Record)