Purification of intestinal epithelial cells
In primary culture, fibroblasts were usually mixed with IECs,
which may grow either in groups or scattered. As IECs and
fibroblasts have different tolerance to trypsin, fibroblasts were
detached from the flask wall firstly while the IECs remained
attached when they were digested with trypsin. Fibroblasts were
then washed away and IECs were left in the flask. The purification
of IECs was performed as described previously [13]. In brief, the
medium was removed, and the cells were rinsed with D-Hank’s
buffer twice, followed by digestion with trypsin (2 ml) at 37uC for 2 min.
Purification of intestinal epithelial cells
In primary culture, fibroblasts were usually mixed with IECs,
which may grow either in groups or scattered. As IECs and
fibroblasts have different tolerance to trypsin, fibroblasts were
detached from the flask wall firstly while the IECs remained
attached when they were digested with trypsin. Fibroblasts were
then washed away and IECs were left in the flask. The purification
of IECs was performed as described previously [13]. In brief, the
medium was removed, and the cells were rinsed with D-Hank’s
buffer twice, followed by digestion with trypsin (2 ml) at 37uC for 2 min.
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