Loss of Graf results in plasmatocyte overproliferation.

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Loss of Graf results in plasmatocyte overproliferation. Loss of Graf results in plasmatocyte overproliferation. (A) Representative confocal images of hemolymph smears from wild-type (w1118) and Graf1/Df third instar larvae. Each hemolymph sample was mixed with an equal volume of DAPI solution to visualize hemocyte nuclei. (B) Concentration of circulating hemocytes in third instar larvae of the following genotypes: wild type, Graf1/Df, crq-GAL4/+ and Graf1/Df; crq- GAL4/+; +/UAS-Graf-HA (Graf rescue). (C) Live mount images of wild-type, Graf1/Df and Graf1,srp-GAL4/Df; +/UAS-Graf-HA (Graf rescue) third instar larvae expressing HmlΔdsRed. (D) Concentration of circulating GFP-positive hemocytes in UAS-mCD8-GFP/+; crq-GAL4/+ (Crq-GFP+ WT), Graf1,+/Df,UAS-mCD8-GFP; crq-GAL4/+ (Crq-GFP+Graf1/Df), lz-GAL4/UAS-mCD8-GFP (Lz-GFP+ WT) and Graf1,lz-GAL4/Df,UAS-mCD8-GFP (Lz-GFP+Graf1/Df) third instar larvae. (E,F) Graf mutants show an excess of pH3-positive cells. (E) Confocal images of total (circulating and sessile) hemocytes from wild-type and Graf1/Df second instar larvae [68-72 h after egg laying (AEL)], stained with DAPI and an anti-phospho-histone H3 (pH3) antibody (arrowheads). (F) Percentage of pH3-positive hemocytes among total hemocytes is shown for the second (68-72 h AEL) and third (92-96 h AEL) instar larvae. Data are mean±s.e.m. The total number of hemolymph samples (B,D; five independent experiments) or hemocytes (F; three independent experiments) analyzed is indicated within each bar. Each hemolymph sample involves five larvae. Comparisons are made against wild type (*P<0.001). Scale bars: 50 µm in A; 200 µm in C; 10 µm in E. Sungdae Kim et al. Development 2017;144:4159-4172 © 2017. Published by The Company of Biologists Ltd