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

Journal of Functional Biomaterials

Kenneth K.B. Tan²  Christine S.Y. Giam¹  Ming Yi Leow¹  Ching Wan Chan³  Evelyn K.F. Yim² 

[1] Department of Biomedical Engineering, National University of Singapore, EA-03-12, 9 Engineering Drive 1, Singapore 117575; E-Mails:;Mechanobiology Institute, National University of Singapore, T-Lab, #05-01, 5A Engineering Drive 1, Singapore 117411; E-Mail:;Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, NUHS Tower Block, Level 8, 1E Kent Ridge Road, Singapore 119228

关键词: breast cancer;    cancer stem cells;    nanotopography;    label-free isolation;    cell adhesion;   

DOI  :  10.3390/jfb6020241

来源: mdpi

【 摘 要 】

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⁺CD24⁻ESA⁺ 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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.