Research Paper Volume 11, Issue 12 pp 3993—4010

Intermediate metabolites of the pyrimidine metabolism pathway extend the lifespan of C. elegans through regulating reproductive signals

Figure 3. Lifespan extension induced by thymine treatment is mediated by the nuclear receptors DAF-12 and NHR-49, and the transcription factor DAF-16/FOXO. (A) Effects of thymine supplementation at increasing concentrations (0.05-10 mM) (P value determined by log-rank tests). (B) Age-related movements of worms treated with 2 mM thymine and vehicles. Data are the mean ± SD; * P <0.05 (Student’s t test). (CF) Lifespan analysis in (C) daf-12 (rh274), (D) daf-16 (mu86), (E) nhr-49 (gk405), and (F) skn-1 (zu67) worms treated with 2 mM thymine (red) and vehicle (black), on heat-inactivated E. coli OP50 (P value by log-rank test). Lifespan values of replicated experiments are summarized in Supplementary Table 1. (G) QPCR analysis of the mRNA level of target genes of daf-12, daf-16 and nhr-49 in C. elegans treated with 2 mM thymine versus control. Data are the mean ± SD, n=3, * p<0.05 (Student’s t test). (HI) Images and quantification of GFP fluorescence. *p < 0.05; n=30 (Student’s t test).