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Differential cell adhesion of breast cancer stem cells on biomaterial substrate with nanotopographical cues.

Tan KK, Giam CS, Leow MY, Chan CW, Yim EK - J Funct Biomater (2015)

Bottom Line: Topography demonstrated a significant effect on cell adhesion, and the effect was cell type dependent.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.

View Article: PubMed Central - PubMed

Affiliation: Mechanobiology Institute, National University of Singapore, T-Lab, #05-01, 5A Engineering Drive 1, Singapore 117411. mbiktkb@nus.edu.sg.

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+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.

No MeSH data available.


Related in: MedlinePlus

Scanning electron microscopic (SEM) images of poly-L-lactic acid (PLLA) patterned films with nano- and micro-structures.
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jfb-06-00241-f001: Scanning electron microscopic (SEM) images of poly-L-lactic acid (PLLA) patterned films with nano- and micro-structures.

Mentions: Solvent casting was used to make the PLLA (3% w/v in chloroform) films from the poly(dimethylsiloxanes) (PDMS) masters with topographies of 250-nm wells, 1-µm wells, 350-nm gratings, 1-µm gratings and 1-µm pillars. PLLA solution was cast on the PDMS master. After drying overnight at room temperature and a brief vacuum drying to remove any residual solvent, the PLLA film was gently stripped off. The scanning electron micrographs (SEM) of the patterned PLLA films showed that the fabrication techniques used were able to replicate nanostructures accurately (Figure 1), verifying the fidelity of the replication.


Differential cell adhesion of breast cancer stem cells on biomaterial substrate with nanotopographical cues.

Tan KK, Giam CS, Leow MY, Chan CW, Yim EK - J Funct Biomater (2015)

Scanning electron microscopic (SEM) images of poly-L-lactic acid (PLLA) patterned films with nano- and micro-structures.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493510&req=5

jfb-06-00241-f001: Scanning electron microscopic (SEM) images of poly-L-lactic acid (PLLA) patterned films with nano- and micro-structures.
Mentions: Solvent casting was used to make the PLLA (3% w/v in chloroform) films from the poly(dimethylsiloxanes) (PDMS) masters with topographies of 250-nm wells, 1-µm wells, 350-nm gratings, 1-µm gratings and 1-µm pillars. PLLA solution was cast on the PDMS master. After drying overnight at room temperature and a brief vacuum drying to remove any residual solvent, the PLLA film was gently stripped off. The scanning electron micrographs (SEM) of the patterned PLLA films showed that the fabrication techniques used were able to replicate nanostructures accurately (Figure 1), verifying the fidelity of the replication.

Bottom Line: Topography demonstrated a significant effect on cell adhesion, and the effect was cell type dependent.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.

View Article: PubMed Central - PubMed

Affiliation: Mechanobiology Institute, National University of Singapore, T-Lab, #05-01, 5A Engineering Drive 1, Singapore 117411. mbiktkb@nus.edu.sg.

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+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.

No MeSH data available.


Related in: MedlinePlus