Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Comparative anterior pituitary miRNA and mRNA expression profiles of Bama minipigs and Landrace pigs reveal potential molecular network involved in animal postnatal growth [mRNA-Seq]

ABSTRACT: The anterior pituitary is the most important endocrine organ modulating animal postnatal growth, mainly by controlling growth hormone (GH) gene transcription, synthesis, and secretion. As an ideal model for animal postnatal growth studies, the Bama minipig is characterized as having a lower growth performance and fewer individual differences compared with larger pig breeds. In this study, anterior pituitaries from Bama minipig and Landrace pig were used for miRNA and mRNA expression profile analysis using miRNA microarrays and mRNA-seq. Consequently, a total of 222 miRNAs and 12,909 transcripts were detected, and both miRNAs and mRNAs in the two breeds showed high correlation (r > 0.97). Additionally, 41 differentially expressed miRNAs and 2,254 transcripts were identified. Pathways analysis indicated that 32 pathways significantly differed in the two breeds. Importantly, two GH-regulation-signalling pathways, cAMP and inositol 1, 4, 5-triphosphate (IP3), and multiple GH-secretion-related transcripts were significantly down-regulated in Bama minipigs. Moreover, target prediction by two algorithms (TargetScan and RNAhybrid) indicated that most miRNA–mRNA target pairs (63.68–71.33%) presented a negatively correlated expression pattern. A possible network among miRNAs, mRNAs, and GH-regulation pathways was also proposed. These data will be helpful in understanding the possible molecular mechanisms involved in animal postnatal growth. mRNA profiling in the anterior pituitary from two different pig breeds.2 pooled samples were analyzed. A pool of 3 pig anterior pituitary was used for Bama minpigs(YB) and Landrace pigs(YC),respectively.

ORGANISM(S): Sus scrofa

SUBMITTER: Ruisong Ye

PROVIDER: E-GEOD-68490 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Purpose: The miRNA profiles were compared among groups of chronic stress exposure and control in two different breeds to identify the differentially expressed miRNAs related to response to chronic stress in the pituitary-adrenal axis. Methods: 6 male adult CFD and 6 Beagles were chosen at random with the similarities in good health, weight and other aspects. Separately, 3 of these two breeds were freely selected for the stress exposure via intermittent electrical stimulation and restraint stress, while the other 3 of these two breeds were non-disposed for normal control.The details for the disposal of dogs were: every morning dogs were restrained and electrical stimulations were exerted with a stable current of 10 mA for 6 s and then with a 6 s interval, lasting for 20 min every day. The duration of disposal was ten days.ll 12 dogs were killed by air embolism in the 11th day. Subsequently, pituitary and adrenal cortex tissues were fast collected and isolated for further high-sequencing. Results: 8 small miRNA libraries were constructed for miRNA-seq. A number of reads ranging from 15,926,611 to 81,028,035 was obtained in those 8 groups.a total of 29 (7 up, 22 down), 37 (16 up, 21 down), 30 (22 up, 8 down), 23 (16 up, 7 down), 21 (15 up, 6 down), 50 (11 up, 39 down), 28 (6 up, 22 down) and 40 (29 up, 11 down) DE-miRNAs (P-value < 0.001, log2(Fold_change) >1) were detected in the comparisons of BAC1_vs_BAC2, BAC1_vs_CFDAC1, BAC2_vs_CFDAC2, CFDAC1_vs_CFDAC2, BP1_vs_BP2, BP1_vs_CFDP1, BP2_vs_CFDP2 and CFDP1_vs_CFDP2, respectively Conclusions: Our results shed light on the miRNA profiles with and within chronic stress exposure in adrenal cortex and pituitary. Adrenal cortex and pituitary miRNA profiles of adult Chinese Field Dog and Beagle under chronic stress exposure and normal control, including BAC1 (Beagle adrenal cortex with disposal), BAC2 (Beagle adrenal cortex with non-disposal), BP1 (Beagle pituitary with disposal), BP2 (Beagle pituitary with non-disposal), CFDAC1 (Chinese Field Dog adrenal cortex with disposal), CFDAC2 (Chinese Field Dog adrenal cortex with non-disposal), CFDP1 (Chinese Field Dog pituitary with disposal), CFDP2 (Chinese Field Dog pituitary with non-disposal), were generated by deep sequencing, using Illumina Hiseq 2000.

Dataset Information

Comparative anterior pituitary miRNA and mRNA expression profiles of Bama minipigs and Landrace pigs reveal potential molecular network involved in animal postnatal growth [mRNA-Seq]

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