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Background  Gene ontology analysis using the microarray database generated in a previous study by this laboratory was used to further evaluate how maternal dietary supplementation with pyridoxine combined with different sources of selenium (Se) affected global gene expression of expanded porcine blastocysts. Data were generated from 18 gilts randomly assigned to one of three experimental diets ( n  = 6 per treatment): i) basal diet without supplemental Se or pyridoxine (CONT); ii) CONT + 0.3 mg/kg of Na-selenite and 10 mg/kg of HCl-pyridoxine (MSeB 6 10); and iii) CONT + 0.3 mg/kg of Se-enriched yeast and 10 mg/kg of HCl-pyridoxine (OSeB 6 10). All gilts were inseminated at their fifth post-pubertal estrus and euthanized 5 days later for embryo harvesting. Differential gene expression between MSeB 6 10 vs CONT, OSeB 6 10 vs CONT and OSeB 6 10 vs MSeB 6 10 was performed using a porcine embryo-specific microarray.    Results  There were 559, 2458, and 1547 differentially expressed genes for MSeB 6 10 vs CONT, OSeB 6 10 vs CONT and OSeB 6 10 vs MSeB 6 10, respectively. MSeB 6 10 vs CONT stimulated 13 biological processes with a strict effect on RNA binding and translation initiation. OSeB 6 10 vs CONT and OSeB 6 10 vs MSeB 6 10 impacted 188 and 66 biological processes, respectively, with very similar effects on genome stability, ceramide biosynthesis, protein trafficking and epigenetic events. The stimulation of genes related with these processes was confirmed by quantitative real-time RT-PCR.    Conclusions  Gene expression of embryos from OSeB 6 10 supplemented gilts was more impacted than those from MSeB 6 10 supplemented gilts. Whereas maternal OSeB 6 10 supplementation influenced crucial aspects of embryo development, maternal MSeB 6 10 supplementation was restricted to binding activity.    Electronic supplementary material  The online version of this article (10.1186/s12864-018-5237-1) contains supplementary material, which is available to authorized users.

Gene ontology analysis of expanded porcine blastocysts from gilts fed organic or inorganic selenium combined with pyridoxine