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J. Funct. Biomater. 2015, 6(2), 241-258; doi:10.3390/jfb6020241

Differential Cell Adhesion of Breast Cancer Stem Cells on Biomaterial Substrate with Nanotopographical Cues

1
Mechanobiology Institute, National University of Singapore, T-Lab, #05-01, 5A Engineering Drive 1, Singapore 117411
2
Department of Biomedical Engineering, National University of Singapore, EA-03-12, 9 Engineering Drive 1, Singapore 117575
3
Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, NUHS Tower Block, Level 8, 1E Kent Ridge Road, Singapore 119228
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Academic Editor: Akhilesh K. Gaharwar
Received: 12 February 2015 / Revised: 10 April 2015 / Accepted: 15 April 2015 / Published: 21 April 2015
(This article belongs to the Special Issue Advanced Nanomaterials for Functional Tissue Engineering)
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Abstract

Cancer stem cells are speculated to have the capability of self-renewal and re-establishment of tumor heterogeneity, possibly involved in the potential relapse of cancer. CD44+CD24−/lowESA+ cells have been reported to possess tumorigenic properties, and these biomarkers are thought to be highly expressed in breast cancer stem cells. Cell behavior can be influenced by biomolecular and topographical cues in the natural microenvironment. We hypothesized that different cell populations in breast cancer tissue exhibit different adhesion characteristics on substrates with nanotopography. Adhesion characterizations were performed using human mammary epithelial cells (HMEC), breast cancer cell line MCF7 and primary invasive ductal carcinoma (IDC) cells obtained from patients’ samples, on micro- and nano-patterned poly-L-lactic acid (PLLA) films. Topography demonstrated a significant effect on cell adhesion, and the effect was cell type dependent. Cells showed elongation morphology on gratings. The CD44+CD24−/lowESA+ subpopulation in MCF7 and IDC cells showed preferential adhesion on 350-nm gratings. Flow cytometry analysis showed that 350-nm gratings captured a significantly higher percentage of CD44+CD24 in MCF7. A slightly higher percentage of CD44+CD24−/lowESA+ was captured on the 350-nm gratings, although no significant difference was observed in the CD44+CD24ESA+ in IDC cells across patterns. Taken together, the study demonstrated that the cancer stem cell subpopulation could be enriched using different nanopatterns. The enriched population could subsequently aid in the isolation and characterization of cancer stem cells. View Full-Text
Keywords: breast cancer; cancer stem cells; nanotopography; label-free isolation; cell adhesion breast cancer; cancer stem cells; nanotopography; label-free isolation; cell adhesion
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tan, K.K.; Giam, C.S.; Leow, M.Y.; Chan, C.W.; Yim, E.K. Differential Cell Adhesion of Breast Cancer Stem Cells on Biomaterial Substrate with Nanotopographical Cues. J. Funct. Biomater. 2015, 6, 241-258.

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