Gallus gallus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA655375 | ENA |
REPOSITORIES: ENA
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Project description:Tibetan chicken has a suite of adaptive features to tolerate the high-altitude hypoxic environment as a unique native breed in Qinghai-Tibet Plateau of China. Increasing evidence suggests that long non-coding RNAs (lncRNAs) and microRNAs (miRNAs) have roles in hypoxic adaptation of high-altitude animals, though their exact contributions remain unclear. This study aims to uncover the global landscape of mRNAs, lncRNAs and miRNAs using transcriptome sequencing so as to construct a regulatory network of competing endogenous RNAs (ceRNAs) provide a new sight for the hypoxic adaptation of Tibetan chicken embryos. In the study, 354 differentially expressed mRNAs (DEGs), 389 differentially expressed lncRNAs (DELs) and 73 differentially expressed miRNAs (DEMs) were identified between Tibetan (TC) and Chahua chicken (CH). The functional analysis showed that several important DEMs and their targets of DELs and DEMs are involved in angiogenesis (include blood vessel development and blood circulation) and energy metabolism (include glucose, carbohydrate and lipid metabolism). The ceRNA network was then constructed with the predicted pairs of DEGs-DEMs-DELs which further revealed regulatory roles of these differentially expressed RNAs in hypoxic adaptation of Tibetan chicken.
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Project description:Adaptation to hypoxia is a complicated and important physiological course for organisms, but the genetic mechanism underlying the adaptation is not fully understood yet. Tibetan Chicken (T), an indigenous chicken breed in China which inhabit in high areas with an altitude above 2,900 meters. Shouguang Chicken(S) and Dwarf Recessive White Chicken (DRW), two lowland chicken breeds, were used as control groups. The heart was the first functional organ to develop during the embryonic development. Furthermore, the heart is an efficient energy converter utilizing the most appropriate fuel for a given environment. Therefore, GeneChip® Chicken Genome Array was employed to identify the differentially expressed genes in embryonic hearts of Tibetan Chicken and two lowland chicken breeds in both hypoxic and normoxic incubating environments with a genome wide profile. Experiment Overall Design: To obtain general expression profiles of embryonic hearts in Tibetan Chicken(T), Dwarf Recessive White Chicken (DRW)and Shouguang Chicken (S)in hypoxia and normoxia, the fertilized full sib eggs of all the three chicken breeds were incubated under two different conditions. The heart was isolated from all the three chicken breeds under the two different conditions for RNA extraction and hybridization on Affymetrix microarrays.
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