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. Author manuscript; available in PMC: 2015 Aug 15.
Published in final edited form as: Science. 2014 Jul 10;345(6198):1255903. doi: 10.1126/science.1255903

Figure 1. Total methylation is stable in UN sperm, with significant locus specific changes.

Figure 1

(A) Experimental design: F1 generation: Dams were randomised on pregnancy day 12.5 to control (C) or undernutrition (UN) groups and UN food intake restricted to 50%. Postnatal litters were equalised to eight pups and animals fed ad libitum. F2 generation: control F1 females mated at age 2 months with non-sibling control or UN males and fed ad libitum to produce: CC - both parents controls; CU - control dam, UN sire.

(B) Independent sperm DNA samples were quantified and pooled in equimolar ratios to generate two pools per condition. Control pools: n=8, 5 litters. UN pools: n=8, 4 litters. Following MeDIP-seq two independent C vs UN comparisons identified DMRs where methylation FC >1.5x and binomial p-value <0.0001 in both independent biological replicates.

(C) Mass spectrometry quantification of control and UN sperm 5-methyl-cytosine (above) and 5-hydroxymethyl-cytosine (below). E14 ESCs are shown for comparison.

(D) Heatmap of 111 hypomethylated DMRs (left) and 55 hypermethylated DMRs (right). Hypermethylated DMRs did not validate.