Journal: bioRxiv
Article Title: Tumor Cell Clustering Enhances Metastatic Competence by Regulating the H3K36 Histone Demethylase KDM2A
doi: 10.64898/2026.01.22.701120
Figure Lengend Snippet: (A,B) Profile plot of H3K36me1 counts per million (CPM) normalized read density (NRD) through the promoter region (−3kB to TSS) of genes in H2030-BrM3 cells, under control (A) or cluster forming (B) conditions and categorized by levels of gene expression. mRNA levels were scaled on expression in H2030-BrM3 control or cluster forming conditions taken at Day 5 ranging from unexpressed (Unex.) < Tertile 1 (T1) < Tertile 2 (T2) < Tertile 1 (T3). Number of genes per tertile are: N=3642 (Unex.), 5397 (T1), 5398 (T2), and 5399 (T3) for control and N=4163 Unex., 5219 (T1), 5235 (T2), 5219 (T3) for clusters. Traces show average of n=4 biological replicates. (C) Box- and-Whisker plots of NRD of traces for A and B. P-value by Kruskal-Wallis test with all comparisons p<0.0001 using Dunn’s multiple testing correction except: T0 cluster vs. T1 cluster (p=0.0059), T0 cluster vs. T3 control (p=0.0022), T0 control vs. T1 control (p=0.0039), and T2 cluster vs. T3 cluster (p=0.0007). (D,E) Quantification of H3K36me1 (D) or H3K36me2 (E) NRD in H2030-BrM3 clusters with the indicated shRNAs through the promoter of activated regions. N=105 loci. P-values by Wilcoxon matched-pairs test. (F,G) Quantification as in D,E, but in 3kB regions surrounding CpG islands genome-wide. N= 20,079 Me1 shControl, 22,200 me1 shKDM2A-1, 24,440 me2 shCon, 23,306 me2 shKdm2a-1. P-values by Wilcoxon matched-pairs test only on those loci with coverage in both conditions. (H) Profile plot of H3K36me1/2/3 average enrichment in KDM2A target genes that are activated (left) or suppressed (right) in H2030-BrM3 clusters. Traces are average of N=4 biological replicates collected at Day 5. (I) Comparative quantification of the promoter region (−3.0 Kb to TSS) for genes from both groups plotted in D. P-value by Mann-Whitney. (J) IGV tracks of CPM NRD for the KDM2A activated gene CYC1 with annotation of CGI, KDM2A chromatin binding peaks, and H3K36me1 peaks in shCon and shKDM2A-1 expressing H2030-BrM3 clusters. Traces are average of n=2 for FLAG-KDM2A and N=4 for H3K36 biological replicates.
Article Snippet: In brief, samples were checked by Agilent Bioanalyzer, and libraries were prepared by the using ThruPlex DNA Seq (Takara Bio. cat. R400674) for H3K36 libraries, and DNA SMART ChiP-Seq (Takara Bio.cat.
Techniques: Control, Gene Expression, Expressing, Whisker Assay, Genome Wide, MANN-WHITNEY, Binding Assay