Live-cell Time-lapse Imaging
ME-180 cells were grown overnight in 35 mm poly-D-lysinecoated
glass-bottom dishes (MatTek Corp., Ashland, MA, USA) to
a non-confluent monolayer. At the start of the assay, cells were
washed once and then transferred to a live-cell incubator that was
connected to an inverted microscope (Cell Observer, Carl Zeiss).
The cells were maintained at 37uC in 5% CO2 throughout the
microscopy process. Ten randomly selected positions (each
containing 20–50 cells in the field of vision) were observed with
a 206 objective for 16 hours. Differential interference contrast
(DIC) images were taken every 10 minutes for each of the positions
that were randomly chosen. Data were collected from three
independent experiments, and a total of 36300 cells were counted
for each of the four types of conditions that were examined,
namely, ME-180 cells alone and ME-180 cells that had been
colonized with each of the three different Lactobacillus strains that
were assessed in this study.
Live-cell Time-lapse Imaging
ME-180 cells were grown overnight in 35 mm poly-D-lysinecoated
glass-bottom dishes (MatTek Corp., Ashland, MA, USA) to
a non-confluent monolayer. At the start of the assay, cells were
washed once and then transferred to a live-cell incubator that was
connected to an inverted microscope (Cell Observer, Carl Zeiss).
The cells were maintained at 37uC in 5% CO2 throughout the
microscopy process. Ten randomly selected positions (each
containing 20–50 cells in the field of vision) were observed with
a 206 objective for 16 hours. Differential interference contrast
(DIC) images were taken every 10 minutes for each of the positions
that were randomly chosen. Data were collected from three
independent experiments, and a total of 36300 cells were counted
for each of the four types of conditions that were examined,
namely, ME-180 cells alone and ME-180 cells that had been
colonized with each of the three different Lactobacillus strains that
were assessed in this study.
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