After 1 h of co-culture with larvae at 37uC, the monolayers were
washed twice with DMEM-10% FBS. The cells were covered with
PI (0.03 mg/ml in DMEM-50% FBS) and incubated at 37uC for
2 min, and then at 4uC for 30 min. After being washed twice with
DMEM-10% FBS, the cells were fixed in 4% paraformaldehyde
for 30 min, washed in PBS, and permeabilized and blocked in
blocking solution (PBS containing 0.1% Triton X-100 and 5%
normal goat serum) at RT for 20 min. The monolayers were
incubated with rabbit immune sera against T. spiralis excretory-
secretory (ES) antigens (1:100) at 37uC for 1 h, washed three times
in PBS, and followed by 40-min incubation with FITC-conjugated
specific secondary antibody (Sigma) at RT in the dark.
Subsequently, the coverslips were mounted on glass slides and
examined under a fluorescence microscope (Olmpus).
After 1 h of co-culture with larvae at 37uC, the monolayers were
washed twice with DMEM-10% FBS. The cells were covered with
PI (0.03 mg/ml in DMEM-50% FBS) and incubated at 37uC for
2 min, and then at 4uC for 30 min. After being washed twice with
DMEM-10% FBS, the cells were fixed in 4% paraformaldehyde
for 30 min, washed in PBS, and permeabilized and blocked in
blocking solution (PBS containing 0.1% Triton X-100 and 5%
normal goat serum) at RT for 20 min. The monolayers were
incubated with rabbit immune sera against T. spiralis excretory-
secretory (ES) antigens (1:100) at 37uC for 1 h, washed three times
in PBS, and followed by 40-min incubation with FITC-conjugated
specific secondary antibody (Sigma) at RT in the dark.
Subsequently, the coverslips were mounted on glass slides and
examined under a fluorescence microscope (Olmpus).
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