Assessing porcine liver-derived biomatrix for hepatic tissue engineering

Tissue Engineering
Paul LinSangeeta N Bhatia

Abstract

Acellular, biologically derived matrices such as small intestinal submucosa have been extensively utilized to induce tissue regeneration and remodeling of connective tissue, vascular grafts, and urinary bladder; however, decellularized scaffolds have not been explored for their potential utility in hepatic tissue engineering. In the case of both extracorporeal hepatocyte-based devices and implantable hepatocyte-scaffold tissue-engineered constructs, maintenance of hepatocellular function is of prime importance. In this study, we specifically explored decellularized, porcine, liver-derived biomatrix (LBM) as a bioresorbable scaffold for primary hepatocytes. Primary rat hepatocytes were cultured on LBM and compared with well-characterized hepatocyte culture models--double-gel cultures that promote maintenance of liver-specific functions for many weeks, and adsorbed collagen monolayers that lead to the rapid decline of hepatocellular function and viability. Hepatocytes were maintained for up to 45 days on LBM and liver-specific functions such as albumin synthesis, urea production, and P-450 IA1 activity were found to be significantly improved over adsorbed collagen cultures. Our data indicate that LBM may be a favorable alternativ...Continue Reading

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