Figure 7.
Delay in thrombopoietic stress response in Gfi1b-DN mice. Time course analysis of the response to platelet depletion by intravenous (i.v.) injection of anti- GPIba antibodies. 4-5 mice for each time point received one injection of anti-GPIbα and were either bled daily to measure absolute platelet counts by quantitative flow cytometry on a first experiment, or were sacrificed 2, 4 or 7 days later on a second experiment for analysis of the bone marrow and hematologic parameters. (A) Circulating platelet levels measured daily after the injection (arrows). (B) Measurement of the hematocrit of the mice from the second experiment and given as the percentage of red blood cell (RBC) volume/total blood volume. (C and D) Quantification by flow cytometry of bone marrow megakaryocyte progenitors (MKP) and megakaryocytes (MK) (C) or pre-erythroid colony forming unit (PreCFUe) and proerythroblasts (D) and reported as mean±standard deviation of % of cells per live cells (top) or as change relative to day 0 (bottom).