Journal: Journal of Hematology & Oncology
Article Title: TFPIα and TFPIβ are expressed at the surface of breast cancer cells and inhibit TF-FVIIa activity
doi: 10.1186/1756-8722-6-5
Figure Lengend Snippet: Cell surface anticoagulant activity of PI-PLC treated cells. Confluent Sum102, MDA-MB-231, and HCAEC cells grown in 24-wells trays were treated with SFM (untreated), PI-PLC, monoclonal anti-TFPI antibody, or anti-TF antibody for 2 hours before the supernatant was removed and cells were washed and assayed for TF activity. Sum102 ( A ), MDA-MB-231 ( B ), and HCAEC ( C ) cells were incubated with FVIIa and FX for 1 hour before the reaction was stopped and a substrate to FXa was added. The results were analyzed colorimetrically at 405 nm. The amount of FXa generated is displayed as mean mU/mL + SD (n ≥ 7) of three to four independent experiments. Statistical comparisons were conducted between PI-PLC treated samples and untreated controls. ( D ) Fluorescence images of SFM + Glycerol (untreated, upper panels) and PI-PLC (bottom panels) treated Sum102 cells stained with antibodies against both isoforms of TFPI (green, left panels) and TF (red, middle-left panels). After merging the images, co-localization of the two antibodies was indicated by a yellow color (middle-right panels). Nuclear staining with DAPI is depicted in the left panels. One representative experiment of three is shown.
Article Snippet: The polyclonal rabbit anti-human tissue factor pathway inhibitor antibody (4901/ADG72), monoclonal mouse anti-human tissue factor pathway inhibitor antibody (4903), and monoclonal mouse anti-human tissue factor antibody (ADG4508) were from American Diagnostica (Greenwich, CT, USA), while the rabbit-IgG-UNLB and goat anti-rabbit IgG (H+L)-RPE antibodies were from Southern Biotechnology Associates (Birmingham, AL, USA).
Techniques: Activity Assay, Incubation, Generated, Fluorescence, Staining