Flow Cytometry – Multimedia

To improve screening efficiency, we have developed a cell cycle analysis method that uses an Acumen Explorer fluorescence microplate cytometer to measure the DNA content of propidium iodide stained fixed cells in microplates. We demonstrate that paclitaxel and vinblastine arrested CHO cells in the expected phase of the cell cycle.

The aim of present study was focused on the effect of silencing target gene in triggering of apoptosis in breast cancer MCF-7 cells. Flow cytometry, light-, confocal microscopy and viability/cytotoxicity tests were used for evaluation of the protein level, percentage of apoptotic cells and morphological features of cell death.

The LacZ reporter fusion assay is an excellent method to precisely quantify knockdown efficiency of siRNA-sequences and can be corroborated by Western blot analysis. Efficient production of Lentiviruses and high transduction efficiency (up to 98%) were achieved on lymphoid B- and T-cells as demonstrated by FACS analysis and GFP expression. Successful knockdown effect with specific shRNA was observed in suspension cells three days after lentiviral infection.

Traditional methods for High Content Analysis (HCA) use technologies such as flow cytometry and microscope-based imaging systems. Laser-scanning microplate cytometry has many advantages over these, and is more amenable for use in High Content Screening (HCS).

For improved screening capability, we have developed a cell cycle analysis method using an Acumen Explorer fluorescence microplate cytometer, capable of reading an entire 384 well microplate in about 10 minutes. The method can perform such analyses on fixed cells in situ, markedly simplifying sample preparation.