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2017 ; 7
(1
): 1689
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gab.com Text
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A comparative multi-parametric in vitro model identifies the power of test
conditions to predict the fibrotic tendency of a biomaterial
#MMPMID28490729
Jannasch M
; Gaetzner S
; Weigel T
; Walles H
; Schmitz T
; Hansmann J
Sci Rep
2017[May]; 7
(1
): 1689
PMID28490729
show ga
Despite growing effort to advance materials towards a low fibrotic progression,
all implants elicit adverse tissue responses. Pre-clinical biomaterial assessment
relies on animals testing, which can be complemented by in vitro tests to address
the Russell and Burch's 3R aspect of reducing animal burden. However, a poor
correlation between in vitro and in vivo biomaterial assessments confirms a need
for suitable in vitro biomaterial tests. The aim of the study was to identify a
test setting, which is predictive and might be time- and cost-efficient. We
demonstrated how sensitive in vitro biomaterial assessment based on human primary
macrophages depends on test conditions. Moreover, possible clinical scenarios
such as lipopolysaccharide contamination, contact to autologous blood plasma, and
presence of IL-4 in an immune niche influence the outcome of a biomaterial
ranking. Nevertheless, by using glass, titanium, polytetrafluorethylene,
silicone, and polyethylene representing a specific material-induced fibrotic
response and by comparison to literature data, we were able to identify a test
condition that provides a high correlation to state-of-the-art in vivo studies.
Most important, biomaterial ranking obtained under native plasma test conditions
showed a high predictive accuracy compared to in vivo assessments, strengthening
a biomimetic three-dimensional in vitro test platform.