Journal: PLoS ONE
Article Title: Shiga Toxin and Lipopolysaccharide Induce Platelet-Leukocyte Aggregates and Tissue Factor Release, a Thrombotic Mechanism in Hemolytic Uremic Syndrome
doi: 10.1371/journal.pone.0006990
Figure Lengend Snippet: (A) Incubation of PBS-treated whole blood at 37°C for 4 h induced a slight increase in platelet-monocyte (A) and platelet-neutrophil (B) aggregate formation compared to baseline levels. Baseline levels of platelet-monocyte aggregates were 10% (range 5–17%, 7 experiments) and platelet-neutrophil aggregates 6% (range 2–13%, 7 experiments). Incubation of whole blood with Stx2 and/or O157LPS (0.5 µg/mL) induced predominantly the formation of platelet-monocyte aggregates. (C) Incubation of whole blood with O157LPS (1 µg/mL) at 37°C for 4 h induced significantly more aggregate formation between platelets and monocytes in comparison to the other LPS serotypes tested while no significant differences, between LPS serotypes, were observed in platelet-neutrophil (D) aggregate formation. Results are expressed as the percentage of the monocyte or neutrophil population that was positive for CD38:FITC or CD66:FITC as well as the platelet specific marker CD42b:RPE-Cy5. Data are expressed as mean±standard deviation (n = 10 experiments), ** denotes P <0.01 when comparing aggregate formation in whole blood incubated with a stimulant and PBS-treated whole blood and * denotes P <0.05, comparing aggregate formation in whole blood incubated with O157LPS with those incubated with O103, O111, O121, or O111:B4LPS. NS; indicates not significant.
Article Snippet: Microparticles were isolated as previously described and incubated with Annexin V-Cy5 (1∶100, BD Biosciences) , mouse anti-human tissue factor CD142:RPE and mouse anti-human CD42b:FITC or mouse anti-human CD38:FITC, alternatively mouse anti-human CD66:FITC, simultaneously or isotype controls IgG 1 :FITC and IgG 1 :PE (all from BD Biosciences).
Techniques: Incubation, Marker, Standard Deviation