2.11. Flow cytometry
AGS treated cells with 40 mg/ml L. lactis subsp. Lactis 44Lac secretions
for 48 h were exploited for flow cytometry assessments
using the BD Bioscience Annexin V-FITC Kit (BD Biosciences, USA).
According to the kit instrument, twice-washed cells (1 106 cells/
mL) with cold PBS (pH 7.2) were re-suspended in a 100 mL binding
buffer, 10 mL PI (Propidium Iodide) solution, and 5 mL Annexin VFITC
for 15 min at room temperature and under dark conditions. A
total of 400 mL binding buffer was again added to each tube. Assessments
were then conducted using the FACS-Calibur flow cytometer
(BD Biosciences, USA), accomplishing analysis on
10,000 cells at a rate of 1000 cells/s. The quadrant setting was
performed with an untreated cell line as the negative control. Data