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. 2024 Nov;38(11):2492-2496.
doi: 10.1038/s41375-024-02407-3. Epub 2024 Sep 9.

Early-life tobacco exposure is causally implicated in aberrant RAG-mediated recombination in childhood acute lymphoblastic leukemia

Affiliations

Early-life tobacco exposure is causally implicated in aberrant RAG-mediated recombination in childhood acute lymphoblastic leukemia

Tanxin Liu et al. Leukemia. 2024 Nov.
No abstract available

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Conflict of interest statement

The authors declare no competing interests.

Figures

Fig. 1
Fig. 1. Somatic alterations and RAG-mediated deletions by prenatal tobacco smoke exposure status in childhood ALL patients.
Analysis of somatic alterations was conducted using whole-genome sequencing data in 35 paired tumor-normal samples. The number of different somatic alteration types in the high tobacco exposure (n = 18) and low tobacco exposure (n = 17) childhood ALL patients is displayed by box and whisker plots for (A) single nucleotide variants (SNVs) and insertion deletion polymorphisms (indels), and (B) structural variants (SVs: deletions, duplications, inversions, translocations). Statistical comparisons were performed using Wilcoxon rank sum tests (***P < 0.001; **P < 0.01; *P < 0.05). Analysis of off-target (non-Ig/TCR) RAG-mediated deletions in the high and low tobacco exposure patients was performed using FIMO. Bar plots display the proportion of deletions in non-Ig/TCR regions with at least one breakpoint (C) or with both breakpoints (D) having an RSS motif in childhood ALL patients with high (n = 18) or low (n = 17) tobacco exposure. A total of 220 non-Ig/TCR region deletions were detected in high tobacco exposure patients and 91 non-Ig/TCR deletions in low exposure patients. Error bars represent 95% bootstrapped confidence intervals. Chi-square tests were used to compare the proportions of deletions with at least one RAG motif (either full, heptamer or nonamer) between two groups. Fisher’s exact tests were used to compare the proportions of deletions with a RAG motif at both breakpoints between two groups. E The proportion of non-Ig/TCR (i.e., off-target) putatively RAG-mediated deletions with at least one full RSS motif was plotted against the distance of the motif from the deletion breakpoint, ranging from within 5-bp to 200-bp. A positive distance represents bases interior to the deletion breakpoint (inside the deletion) and a negative value represents bases exterior to the breakpoint (outside the deletion). Proportions are displayed for the high (n = 18) and low (n = 17) tobacco exposure patients separately.

Update of

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