The electrospinning membrane was assessed by culture of
mouse fibroblast supplemented with the extractant of the electrospun
membrane. The electrospun membrane was sterilized with
highly compressed steam for 15 min and placed in wells of 24-
well culture plate respectively. The samples were then incubated
in 1 mL RPMI1640 medium at 37 ◦C for 24 h. The extraction ratio
was 0.2 g/mL. At the end of this period, the electrospun membrane
was removed, and the so-called extracts were obtained and further
were diluted to obtain extraction medium samples with concentration
of 25, 50 and 100% (relative to original extracts).
L929 cells were seeded in wells of 96–well plate at a density
of 103 cells per well. After incubation for another 24 h, the culture
medium was removed and replaced with the as-prepared extraction
medium and incubated for another 48 h, and then 100 L of
MTT solution was added to each well. After 3 h incubation at 37 ◦C,
200 L of dimethyl sulfoxide was added to dissolve the formazan
crystals. The dissolved solution was swirled homogeneously for
about 10 min by the shaker. The optical density of the formazan
solution was detected by an ELISA reader (Multiscan MK3, Labsystem
Co., Finland) at 490 nm.
For reference purposes, cells were seeded to medium containing
0.64% phenol (positive control) and a fresh culture medium
(negative control) under the same seeding conditions, respectively.
Results are depicted as mean
±
standard deviation. Significance
between the mean values was calculated using ANOVA one-way