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De Bartolo, L. et al.

De Bartolo, Morelli, Gallo, Campana, Statti, Rende, Salerno, Drioli,

Effect of isoliquiritigenin on viability and differentiated functions of human hepatocytes maintained on PEEK-WC-polyurethane membranes.

In this study, we tested the ability of microporous membranes synthesised from a polymeric blend of modified polyetheretherketone (PEEK-WC) and polyurethane (PU) to support long-term maintenance and differentiation of human liver cells. The effect of isoliquiritigenin (ISL), which is a component of liquorice extract, exhibiting growth stimulatory and antiproliferative dose-dependent effect was investigated by comparing cultures treated with ISL with those untreated. To this purpose, flat-sheet membranes were prepared by a blend of PEEK-WC and PU polymers by phase inverse technique. The morphological and physico-chemical properties were characterised, respectively, by scanning electron microscopy and water contact angle measurements. Human hepatocytes cultured on PEEK-WC-PU membranes were constant up to 1 month albumin production and urea synthesis as well as the synthesis of total proteins. The liver-specific functions were expressed at high levels when cells were cultured on membranes with respect to collagen. Also the biotransformation functions were maintained for all culture periods: the ISL elimination rate increased during the culture time and high values were measured up to 22 days. Thereafter, a decrease was observed. ISL stimulated the proliferation of hepatocytes cultured on both substrata but did not affect their liver-specific functions. Hepatocytes cultured on PEEK-WC-PU membranes responded very well to ISL and expressed high levels of P450 cytochrome. These results demonstrated that long-term maintenance of human liver differentiation can be achieved on PEEK-WC-PU membranes. The incubation with ISL at the investigated concentration could stimulate the proliferation of human hepatocytes in biohybrid systems.[1]

References

Effect of isoliquiritigenin on viability and differentiated functions of human hepatocytes maintained on PEEK-WC-polyurethane membranes. De Bartolo, L., Morelli, S., Gallo, M.C., Campana, C., Statti, G., Rende, M., Salerno, S., Drioli, E. Biomaterials (2005) [Pubmed]

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