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  4. Efficient assembly of rat hepatocyte spheroids for tissue engineering applications
 
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Efficient assembly of rat hepatocyte spheroids for tissue engineering applications

Resource
BIOTECHNOLOGY AND BIOENGINEERING v.50 n.4 pp.404-415
Journal
BIOTECHNOLOGY AND BIOENGINEERING
Journal Volume
v.50
Journal Issue
n.4
Pages
404-415
Date Issued
1996
Date
1996
Author(s)
WU, FLORENCE J
FRIEND JULIE R.
HSIAO, C.C.
J. ZILLIOX MICHAEL
KO, WEN-JE
B. CERRA FRANK
HU, WEI-SHOU
URI
http://ntur.lib.ntu.edu.tw//handle/246246/92802
Abstract
  Freshly harvested primary rat hepatocytes cultivated as multicellular aggregates, or spheroids, have been observed to exhibit enhanced liver- specific function and differentiated morphology compared to cells cultured as monolayers. An efficient method of forming spheroids in spinner vessels is described. Within 24h after inoculation, greater than 80% of inoculated cells formed spheroids. This efficiency was significantly greater than that reported previously for formation in stationary petri dishes. With a high specific oxygen uptake rate of 2.0 x 10-9 mmol O2/cell / h, the oxygen supply is critical and should be monitored for successful formation. period, spheroids assembled in spinner cultures maintained a high viability and produced albumin and urea at constant rates. Transmission electron microscopy indicated extensive cell-cell contacts and tight junctions between cells within spheroids. Microvilli-lined bile canaliculus-like channels were observed in the interior of spheroid and appeared to access the exterior through pores at the outer surface. Spheroids from spinner cultures exhibited at least the level of liver- specific activity as well as similar morphology and ultrastructure compared to spheroids formed in stationary petri dishes. Hepatocytes cultured as spheroids are potentially useful three- dimensional cell systems for application in a bioartificial liver device and for studying xenobiotic drug metabolism.
Type
journal article

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