Multilayer nanofilms as substrates for hepatocellular applications
| Autor: | Christin M. Lepus, William Mark Saltzman, Corinne R. Wittmer, Jennifer A. Phelps, Paul R. Van Tassel, Martha J. Harding |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Cell Survival Surface Properties Cell Culture Techniques Biophysics Biocompatible Materials Bioengineering Article Styrene Allylamine Biomaterials Chitosan chemistry.chemical_compound Tissue engineering Materials Testing Polymer chemistry Cell Adhesion Animals Humans Cells Cultured Cell Proliferation chemistry.chemical_classification Tissue Engineering Layer by layer Membranes Artificial Polymer Polyelectrolyte Nanostructures Rats Membrane chemistry Mechanics of Materials Hepatocytes Ceramics and Composites |
| Zdroj: | Biomaterials. 29:4082-4090 |
| ISSN: | 0142-9612 |
| Popis: | Multilayer nanofilms, formed by the layer-by-layer (LbL) adsorption of positively and negatively charged polyelectrolytes, are promising substrates for tissue engineering. We investigate here the attachmemt and function of hepatic cells on multilayer films in terms of film composition, terminal layer, rigidity, charge, and presence of biofunctional species. Human hepatocellular carcinoma cells (HepG2), adult rat hepatocytes (ARH), and human fetal hepatoblasts (HFHb) are studied on films composed of the polysaccharides chitosan (CHI) and alginate (ALG), the polypeptides poly(L-lysine) (PLL) and poly(L-glutamic acid) (PGA), and the synthetic polymers poly(allylamine hydrochloride) (PAH) and poly(styrene sulfonate) (PSS). The influence of chemical cross-linking following LbL assembly is also investigated. We find HepG2 to reach confluence after seven days of culture on only 2 of 18 candidate multilayer systems: (PAH-PSS)n (i.e. n PAH-PSS bilayers) and cross-linked (PLL-ALG)n-PLL. These two systems, as well as cross-linked (PLL-PGA)n-PLL, support attachment and function (in terms of albumin production) of ARH, provided collagen is adsorbed to the top of the film. (PAH-PSS)n, cross-linked (PLL-ALG)n, and cross-linked (PLL-PGA)n-PLL films all support attachment, layer confluence, and function of HFHb, with the latter film promoting the greatest level of function at 8 days. Overall, film composition, terminal layer, and rigidity are key variables in promoting attachment and function of hepatic cells, while film charge and biofunctionality are somewhat less important. These studies reveal optimal candidate multilayer biomaterials for human liver tissue engineering applications. |
| Databáze: | OpenAIRE |
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