title: Mouse fetal liver cells in artificial capillary beds in three-dimensional four-compartment bioreactors.
abstract: Bioreactors containing porcine or adult human hepatocytes have been used to sustain acute liver failure patients until liver transplantation. However, prolonged function of adult hepatocytes has not been achieved due to compromised proliferation and viability of adult cells in vitro. We investigated the use of fetal hepatocytes as an alternative cell source in bioreactors. Mouse fetal liver cells from gestational day 17 possessed intermediate differentiation and function based on their molecular profile. When cultured in a three-dimensional four-compartment hollow fiber-based bioreactor for 3 to 5 weeks these cells formed neo-tissues that were characterized comprehensively. Albumin liberation, testosterone metabolism, and P450 induction were demonstrated. Histology showed predominant ribbon-like three-dimensional structures composed of hepatocytes between hollow fibers. High positivity for proliferating cell nuclear antigen and Ki-67 and low positivity for terminal dUTP nick-end labeling indicated robust cell proliferation and survival. Most cells within these ribbon arrangements were albumin-positive. In addition, cells in peripheral zones were simultaneously positive for alpha-fetoprotein, cytokeratin-19, and c-kit, indicating their progenitor phenotype. Mesenchymal components including endothelial, stellate, and smooth muscle cells were also observed. Thus, fetal liver cells can survive, proliferate, differentiate, and function in a three-dimensional perfusion culture system while maintaining a progenitor pool, reflecting an important advance in hepatic tissue engineering.
authors.affiliation: Department of Pathology, McGowan Institute for Regenerative Medicine, and the Department of Pharmacy, University of Pittsburgh, SOM, S421-BST, 200 Lothrop St., Pittsburgh PA 15261, USA. smonga@pitt.edu
authors.forename: Satdarshan P S
authors.initials: SP
authors.lastname: Monga
authors.forename: Mariah S
authors.initials: MS
authors.lastname: Hout
authors.forename: Matt J
authors.initials: MJ
authors.lastname: Baun
authors.forename: Amanda
authors.initials: A
authors.lastname: Micsenyi
authors.forename: Peggy
authors.initials: P
authors.lastname: Muller
authors.forename: Lekha
authors.initials: L
authors.lastname: Tummalapalli
authors.forename: Aarati R
authors.initials: AR
authors.lastname: Ranade
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Luo
authors.forename: Stephen C
authors.initials: SC
authors.lastname: Strom
authors.forename: Jörg C
authors.initials: JC
authors.lastname: Gerlach
mesh_terms: D000418:Albumins / Q000096:biosynthesis; D000818:Animals; D019149:Bioreactors; D018929:Cell Culture Techniques / Q000379:methods*; D002454:Cell Differentiation; D049109:Cell Proliferation; D003577:Cytochrome P-450 Enzyme System / Q000032:analysis; D005260:Female; D022781:Hepatocytes / Q000166:cytology* / Q000502:physiology*; D020287:In Situ Nick-End Labeling; D007633:Keratins / Q000032:analysis; D019394:Ki-67 Antigen / Q000032:analysis; D008099:Liver / Q000196:embryology; D008648:Mesoderm / Q000166:cytology; D051379:Mice; D011247:Pregnancy; D018809:Proliferating Cell Nuclear Antigen / Q000032:analysis; D019009:Proto-Oncogene Proteins c-kit / Q000032:analysis; D013234:Stem Cells / Q000166:cytology / Q000502:physiology; D013739:Testosterone / Q000378:metabolism; D023822:Tissue Engineering / Q000379:methods*; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D000418:Albumins; D019394:Ki-67 Antigen; C498355:Mki67 protein, mouse; D018809:Proliferating Cell Nuclear Antigen; D000509:alpha-Fetoproteins; D013739:Testosterone; D007633:Keratins; D003577:Cytochrome P-450 Enzyme System; D019009:Proto-Oncogene Proteins c-kit