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Comparative trancriptome analysis of weaned pigs in response to different dietary starch sources

ABSTRACT: The starch, acting as the major energy-producing component of the daily diet, is the main carbohydrate in mammal nutrition. However, the nutritional value of starch can vary widely depending upon its source and site of digestion. The distinct physiological responses were previously observed both in human and other mammals, but still little is known about the underlying mechanisms regarding the metabolic shifts due to the intake of various dietary starches. Here, we assessed the overall metabolic changes in weaned pigs induced by different dietary starch sources at the transcriptome level. Sixteen weaned pigs (DurocÃLandraceÃYorkshire) were selected and randomly allotted to diets containing either wheat (WH) or cassava (CA) starch as the energy source (n=8). We measured serum metabolites and hormones and generated transcriptional profiles of liver. 648 genes in liver were differentially expressed in response to dietary starch sources. Pathway analysis indicated that dietary starch sources altered both carbohydrate and lipid metabolism in liver. In contrast, CA may be more healthful as dietary energy source than WH by down-regulating lipogenesis and steroidogenesis in liver. Sixteen weaned pigs (DurocÃLandraceÃYorkshire) with an average initial body weight of 7.37Â±0.25 kg were selected and randomly allotted to two dietary treatments (either wheat or cassava starch as the energy source) for 21 d. At the end of the trial, the liver tissue were collected for transcriptome analysis using Agilent porcine microarrays.

ORGANISM(S): Sus scrofa

SUBMITTER: Jun He

PROVIDER: E-GEOD-20721 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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