Urocitellus parryii
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ABSTRACT:
PROVIDER: PRJNA96231 | ENA |
REPOSITORIES: ENA
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Project description:Arctic Ground Squirrel (Urocitellus parryii)
| PRJNA247811 | ENA
Project description:miRNAs are 19-25 nucleotides long small RNAs now well-known for their regulatory roles in the development and diseases through post-transcriptional and translational controls in a wide range of species. Mammalian hibernation is a physiological process involving dramatic metabolic suppression and cellular reorganization, during which miRNAs may play an important role. We systematically analyzed the miRNAs in the liver of an extreme hibernating species, arctic ground squirrels (Spermophilus parryii), during two stages of hibernation compared to non-hibernating animals by massively parallel Illumina sequencing technology. We identified more than 200 ground squirrel miRNAs including novel miRNAs specific to ground squirrel and a fast-evolving miRNA cluster that also showed significant differential expression during hibernation. Integrating with Agilent miRNA microarray and Real-time PCR results, we identified that mir-211, mir-378, mir-184, mir-200a, and mir-320 were significantly under-expressed during hibernation, whereas mir-144, mir-486, mir-451, mir-142-5p, and mir-1 were over-expressed. Analyses of the their target genes suggested that these miRNAs could play an important role to suppress tumor progression and cell growth during hibernation. Investigation of microRNA changes in arctic ground squirrel livers during Early Arousal(EA), Late Topor(LT), and Post-Reproduction(PR) stages.
2010-11-30 | E-GEOD-19807 | biostudies-arrayexpress
Project description:miRNAs are 19-25 nucleotides long small RNAs now well-known for their regulatory roles in the development and diseases through post-transcriptional and translational controls in a wide range of species. Mammalian hibernation is a physiological process involving dramatic metabolic suppression and cellular reorganization, during which miRNAs may play an important role. We systematically analyzed the miRNAs in the liver of an extreme hibernating species, arctic ground squirrels (Spermophilus parryii), during two stages of hibernation compared to non-hibernating animals by massively parallel Illumina sequencing technology. We identified more than 200 ground squirrel miRNAs including novel miRNAs specific to ground squirrel and a fast-evolving miRNA cluster that also showed significant differential expression during hibernation. Integrating with Agilent miRNA microarray and Real-time PCR results, we identified that mir-211, mir-378, mir-184, mir-200a, and mir-320 were significantly under-expressed during hibernation, whereas mir-144, mir-486, mir-451, mir-142-5p, and mir-1 were over-expressed. Analyses of the their target genes suggested that these miRNAs could play an important role to suppress tumor progression and cell growth during hibernation. Three total RNA pools from arctic ground squirrel livers in Early Arousal(EA), Late Topor(LT), and Post-Reproduction(PR) stages were hybridized to three Agilent mouse miRNA microarrays.
2010-11-30 | E-GEOD-19427 | biostudies-arrayexpress
Project description:The cecal microbial community of the arctic ground squirrel shifts in diversity, activity and numbers across the hibernation season
| PRJNA230931 | ENA
Project description:miRNAs are 19-25 nucleotides long small RNAs now well-known for their regulatory roles in the development and diseases through post-transcriptional and translational controls in a wide range of species. Mammalian hibernation is a physiological process involving dramatic metabolic suppression and cellular reorganization, during which miRNAs may play an important role. We systematically analyzed the miRNAs in the liver of an extreme hibernating species, arctic ground squirrels (Spermophilus parryii), during two stages of hibernation compared to non-hibernating animals by massively parallel Illumina sequencing technology. We identified more than 200 ground squirrel miRNAs including novel miRNAs specific to ground squirrel and a fast-evolving miRNA cluster that also showed significant differential expression during hibernation. Integrating with Agilent miRNA microarray and Real-time PCR results, we identified that mir-211, mir-378, mir-184, mir-200a, and mir-320 were significantly under-expressed during hibernation, whereas mir-144, mir-486, mir-451, mir-142-5p, and mir-1 were over-expressed. Analyses of the their target genes suggested that these miRNAs could play an important role to suppress tumor progression and cell growth during hibernation.
2010-11-30 | GSE19807 | GEO
Project description:miRNAs are 19-25 nucleotides long small RNAs now well-known for their regulatory roles in the development and diseases through post-transcriptional and translational controls in a wide range of species. Mammalian hibernation is a physiological process involving dramatic metabolic suppression and cellular reorganization, during which miRNAs may play an important role. We systematically analyzed the miRNAs in the liver of an extreme hibernating species, arctic ground squirrels (Spermophilus parryii), during two stages of hibernation compared to non-hibernating animals by massively parallel Illumina sequencing technology. We identified more than 200 ground squirrel miRNAs including novel miRNAs specific to ground squirrel and a fast-evolving miRNA cluster that also showed significant differential expression during hibernation. Integrating with Agilent miRNA microarray and Real-time PCR results, we identified that mir-211, mir-378, mir-184, mir-200a, and mir-320 were significantly under-expressed during hibernation, whereas mir-144, mir-486, mir-451, mir-142-5p, and mir-1 were over-expressed. Analyses of the their target genes suggested that these miRNAs could play an important role to suppress tumor progression and cell growth during hibernation.
2010-11-30 | GSE19427 | GEO
Project description:Mammalian hibernators display phenotypes similar to physiological conditions in non-hibernating species under conditions of calorie restriction and fasting, hypoxia, hypothermia, ischemia-reperfusion, and sleep. However, whether or how similarities are also reflected on molecular and genetic levels is unclear. We identified molecular signatures of torpor and arousal in hibernation using a new custom-designed cDNA microarray for the arctic ground squirrel (Urocitellus parryii,) and compared them to molecular signatures of selected phenotypes in mouse. Our results show that differential gene expression related to metabolism during torpor is closely related to that during calorie restriction and hypoxia. PPARM-NM-1 is crucial for metabolic remodeling in hibernation. Genes related to the sleep-wake cycle and temperature response genes induced by hypothermia follow the same expression changes as in torpor-arousal cycle. Increased fatty acid metabolism might contribute to the protection against ischemia-reperfusion injury during hibernation. Further, by comparing with thousands of pharmacological signatures, we identified drugs that may induce similar expression patterns in human cell lines as during hibernation. Arctic ground squirrels sampled during winter hibernation were compared with the animals sampled during summer. Liver was hybridized on a custom 9,600 probes nylon membrane microarray platform. Four squirrels in early torpor, five in late torpor, four in early arousal, four in late arousal, and seven in summer active were studied in experiments.
2012-09-01 | E-GEOD-38700 | biostudies-arrayexpress
Project description:Hibernation is an energy-saving strategy adopted by a wide range of mammals to survive highly seasonal or unpredictable environments. Arctic ground squirrels living in Alaska provide an extreme example, with 6-9 months long hibernation seasons when body temperature alternates between levels near 0 C during torpor and 37 C during arousal episodes. Heat production during hibernation is provided, in part, by non-shivering thermogenesis that occurs in large deposits of brown adipose tissue (BAT). BAT is active at tissue temperatures from 0 to 37 C during rewarming and continuously at near 0 C during torpor in subfreezing conditions. Despite its crucial role in hibernation, the global gene expression patterns in BAT during hibernation compared to the non-hibernation season remain largely unknown. We report a large-scale study of differential gene expression in BAT between winter hibernating and summer active arctic ground squirrels using mouse microarrays. Selected differentially expressed genes identified on the arrays were validated by quantitative real-time PCR using ground squirrel specific primers. Our results show that the mRNA levels of the genes involved in nearly every step of the biochemical pathway leading to non-shivering thermogenesis are significantly increased in BAT during hibernation, whereas those of genes involved in protein biosynthesis are significantly decreased compared to the summer active animals in August. The differentially expressed genes also include those involved in adipose differentiation, substrate transport, and structure remodeling, which may enhance thermogenesis at low tissue temperatures in BAT. Keywords: hibernating animals vs. summer active animals
2005-10-21 | GSE3426 | GEO
Project description:Comparative functional genomics of adaptation to muscular disuse in hibernating mammals (Arctic ground squirrels)
| PRJNA263942 | ENA
Project description:Detection of Differential Gene Expression in Brown Adipose Tissue of Hibernating Arctic Ground Squirrels
| PRJNA93461 | ENA