Acute induction of histone acetylation on the jejunal sucrase–isomaltase gene by dietary fructose

Induction by fructose force-feeding of histone H3 and H4 acetylation at their lysine residues around the Slc2a5 gene and its expression in mice

It has been reported that fructose force-feeding rapidly induced jejunal Slc2a5 gene expression in rodents. We demonstrate in this study that acetylation at lysine (K) 9 of histone H3 and acetylation at K5 and K16 of histone H4 were more enhanced in the promoter/enhancer to transcribed regions of the Slc2a5 gene in fructose force-fed mice than in glucose force-fed mice. However, fructose force-feeding did not induce acetylation at K14 of histone H3, or at K8 and K12 of histone H4 around the Slc2a5 gene. These results suggest that fructose force-feeding induced selective histone acetylation, particularly of H3 and H4, around the jejunal Slc2a5 gene in mice.

Trimethylation of histone H3K4 is associated with the induction of fructose-inducible genes in rat jejunum

We previously reported that fructose force-feeding rapidly induces jejunal Slc2a5 gene expression in rats. In this study, we conducted microarray analyses using total RNA to identify genes upregulated in rat jejunum by fructose force-feeding. Rats were force-fed fructose, glucose or distilled water for 6h. Genes such as Slc2a5, Cdkn1c, Cabp2, Ranbp3, Vwce and Gcgr were induced by force-feeding with fructose compared with glucose or distilled water. Chromatin immunoprecipitation assays revealed that trimethylation of histone H3K4, and acetylation of histones H3 and H4, on the transcribed region of these fructose-inducible genes were enhanced by force-feeding of fructose, but not glucose or distilled water. These results suggest that the induction of genes in the rat jejunum by fructose force-feeding is coordinately regulated by histone modifications, particularly trimethylation of histone H3K4.