Authors: Nguyen, Kytai Truong; Shukla, Kajal P.; Moctezuma, Miriam; Tang, Liping

Source: Journal of Nanoscience and Nanotechnology, Volume 7, Number 8, August 2007 , pp. 2823-2832(10)

Publisher: American Scientific Publishers

Abstract:

Recent studies have demonstrated that surface nano-topography affect cell responses and activities. However, the molecular mechanism of the nano-structures on cellular behavior is yet to be determined. To bridge this gap, the present study was aimed to investigate the cellular and molecular responses of smooth muscle cells (SMCs) to surface nano-topography in vitro using nano-porous alumina membranes with different sizes (200 nm- and 20 nm-pores). Cellular responses such as cell adhesion, morphology, and proliferation were assessed using scanning electron microscopy (SEM), hematoxylin and eosin (HE) staining, and cell counting. The molecular cell responses were also investigated using cDNA microarrays. Results from these studies showed an unchanged response in cell adhesion, an alteration in cell morphology, and an increase in cell proliferation for cells grown on 200 nm-pore surfaces than on 20 nm-pore surfaces. In addition, exposure of SMCs to larger nano-pores induced the expression of various genes involved in cell cycle, DNA replication, cell proliferation, and signaling transduction pathways. These findings demonstrated that cellular responses of SMCs are dependent on the underlying nano-topography, and thereby suggesting nano-dimensional surface is one of the most important considerations to design of the next generation of medical devices and tissue engineering scaffolds.

Keywords: NANOTOPOGRAPHY; MORPHOLOGY; PROLIFERATION; CDNA MICROARRAYS; SMOOTH MUSCLE CELLS

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2007.610

Publication date: 2007-08-01

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• Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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