Journal: bioRxiv
Article Title: WRAD core perturbation impairs DNA replication fidelity promoting immunoediting in pancreatic cancer
doi: 10.1101/2024.10.21.619543
Figure Lengend Snippet: a. Western blot analysis of proteins bound to nascent DNA retrieved using iPOND or input control in KPC cells. Cells were treated as follows: control (negative control, no biotin in the click reaction), EdU pulse (EdU treatment for 2, 5 or 10 min), chase (EdU treatment for 10 min, followed by a 60 min thymidine chase). Histone H3 was used as a loading control. b. Modified PLA (SIRF) assay detecting the interaction between the incorporated BrdU (5 min pulse) and WDR5 (left) or DPY30 (right). BrdU:PCNA and BrdU:luciferase were used as positive and negative control, respectively. Scale bar = 5 μm. c. Western blot analysis of iPOND or input control in control (sgCTR) or Dpy30 -KO (sgDpy30) KPC cells. Cells were treated as described in a. Histone H3 was used as a loading control. d. Schematic illustration and confocal images of DNA fiber assay in sgCTR and sgDpy30 KPC cells. e. Violin plots reporting mean fork progression rate (left) and fork symmetry (right) in cells as in d. f. Confocal images of DNA fiber assay in sgCTR or sgDpy30 KPC cells. White arrows indicate a fiber with non-aberrant DNA replication, yellow arrows indicate overlapped CldU and IdU incorporation (DNA re-replication). g. Violin plots reporting the frequency of DNA re-replication (left) and the fiber re-replication ratio (right) in cells as in f. h. Trend curves showing the dual CldU:IdU incorporation (score) calculated from the density of ChIPseq reads of IdU and CldU IP in sgCTR and sgDpy30 KPC cells. h. Bar plot showing genome length of single (IdU or CldU) and double nucleotide (CldU+IdU) incorporation in sgCTR and sgDpy30. j. immunofluorescence images of sgCTR or sgDpy30 KPC cells stained for pS4-8 RPA (red), pS139 H2AX (γH2AX, green), and nuclei (blue). Right, graphs reporting the percentage of γH2AX-positive or pS4-8 RPA-positive sgCTR or sgDpy30 KPC cells. Each dot represents a different analyzed field, scale bar = 100 μm. k. Left, immunofluorescence images of mitotic KPC cells stained with DAPI (DNA, white). Yellow arrows indicate lagging chromosomes and chromosome bridges. Right, violin plot reporting the mean percentage of sgCTR or sgDpy30 KPC cells with aberrant mitotic outcomes in vitro . k. Left panel, images of metaphase spreads in sgCTR or sgDpy30 KPC cells stained with Giemsa (chromosome). Red arrow indicates chromosome fusion and fragmentation. Right panel, percentage of KPC cells with normal (gray) or aberrant (yellow) mitotic outcomes. In the figure, n indicates the number of analyzed events. Data are expressed as mean values ± SD. Statistical significance was calculated using the Mann-Whitney test (e, g), Student’s t test (j, k) or Fisher’s exact Chi square test (i, l).
Article Snippet: The primary antibodies used were anti-WDR5 (rabbit), anti-DPY30 (rabbit, Bethyl), anti-PCNA (rabbit) and anti-BrdU (mouse).
Techniques: Western Blot, Control, Negative Control, Modification, Luciferase, Immunofluorescence, Staining, In Vitro, MANN-WHITNEY