Research Paper Volume 8, Issue 9 pp 1896—1922

Analysis of the machinery and intermediates of the 5hmC-mediated DNA demethylation pathway in aging on samples from the MARK-AGE Study

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Figure 3. Age-related changes of TET3 mRNA levels in PBMC. Upper panels show scatter plots representing the linear correlation between TET3 mRNA levels and age in PBMC calculated from (A1) non-transformed TET1 data, (B1) log-transformed TET3 data, (C1) batch-corrected TET3 data, (D1) batch-corrected TET3 data retaining age and gender differences. Parametric (Pearson r) and non-parametric (Spearman’s ρ) correlation coefficients and statistical significance are given above each graph. Lower panels show bar graphs reporting the expression levels of TET1 gene in three different age classes calculated from (A2) non-transformed TET3 data, (B2) log-transformed TET3 data, (C2) batch-corrected TET3 data, (D2) batch-corrected TET3 data retaining age and gender differences. Boxplots show the median, the interquartile range (boxes) and the 5–95% data range (whisker caps). Comparisons between groups were performed by the Kruskal-Wallis test followed by post-hoc Bonferroni test (*P < 0.05; **P < 0.01). (y)= years.