GEO DataSets

(Submitter supplied) Hibernation is energy saving adaptation involving suppression of activity to survive in highly seasonal environments. Immobility and disuse generate muscle loss in most mammalian species. In contrast to other mammals, bears and ground squirrels demonstrate limited muscle atrophy over the physical inactivity of winter hibernation. This suggests that hibernating mammals have adaptive mechanisms to prevent disuse muscle atrophy. more...

Organism:

Urocitellus parryii

Type:

Expression profiling by array

Platform:

GPL15674

19 Samples

Download data: TXT

(Submitter supplied) Hibernation is energy saving adaptation involving suppression of activity to survive in highly seasonal environments. Immobility and disuse generate muscle loss in most mammalian species. In contrast to other mammals, bears and ground squirrels demonstrate limited muscle atrophy over the physical inactivity of winter hibernation. This suggests that hibernating mammals have adaptive mechanisms to prevent disuse muscle atrophy. more...

Organism:

Ursus americanus

Type:

Expression profiling by array

Platform:

GPL13263

12 Samples

Download data: TXT

(Submitter supplied) We analyzed gene expression in the American black bear, Ursus americanus, using a custom 12,800 cDNA probe (BA02) microarray to detect differences in expression that occur in heart and liver during winter hibernation in comparison to summer active animals. We identified 245 genes in heart and 319 genes in liver that were differentially expressed between winter and summer. The expression of 24 genes was significantly elevated during hibernation in both heart and liver. more...

Organism:

Ursus americanus

Type:

Expression profiling by array

Platforms:

GPL8249 GPL13263

35 Samples

Download data: TXT

(Submitter supplied) Physical inactivity reduces mechanical load on the skeleton, which leads to losses of bone mass and strength in non hibernating mammalian species. Although bears are largely inactive during hibernation, they show no loss in bone mass and strength. To obtain insight into molecular mechanisms preventing disuse bone loss, we conducted a large-scale screen of transcriptional changes in trabecular bone comparing winter hibernating and summer non hibernating black bears using a custom 12,800 probe cDNA microarray. more...

Organism:

Ursus americanus

Type:

Expression profiling by array

Platforms:

GPL8249 GPL13263

24 Samples

Download data: TXT

(Submitter supplied) We conducted a large-scale gene expression screen using the 3,200 cDNA probe microarray developed specifically for Ursus americanus to detect expression differences in liver and skeletal muscle that occur during winter hibernation in comparison to animals sampled during summer. The expression of 12 genes, including RNA binding protein motif 3 (Rbm3), that are mostly involved in protein biosynthesis, was induced during hibernation in both liver and muscle. more...

Organism:

Ursus americanus

Type:

Expression profiling by array

Platform:

GPL8249

27 Samples

Download data: TXT

(Submitter supplied) 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). more...

Organism:

Mus musculus; Urocitellus parryii

Type:

Expression profiling by array

4 related Platforms

44 Samples

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(Submitter supplied) Male and female 2- and 3-years old brown bear from the region of Tackasen (Sweden) were captured in summer and winter. Muscle biopsies from vastus lateralis were collected in february (hibernation state) and june (active period). Total RNA were extracted from muscle tissue and full transcriptome analysis (RNA Seq) were performed. Statistical analysis were performed to winter versus summer comparison from matched paired samples

Organism:

Ursus arctos

Type:

Expression profiling by high throughput sequencing

Platform:

GPL28129

12 Samples

Download data: TXT

(Submitter supplied) Mammalian hibernation is a dramatic physiological transition that involves the controlled reduction of regulated body temperature and the consequent depression of all physiological processes. The resulting reduction of metabolism and associated energy expenditure permits survival during extended periods of poor food availability in winter. To date our understanding of the molecular events that give rise to the hibernating phenotype is fragmentary and incomplete. more...

Organism:

Callospermophilus lateralis; Ictidomys tridecemlineatus

Type:

Expression profiling by array

Platform:

GPL1706

115 Samples

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(Submitter supplied) Hibernation is a seasonally adaptive strategy that allows hibernators to live through extreme cold condition and was viewed as a highly regulated physiological event. In spite of the profound reduction of blood flow to retina, hibernation causes no lasting retinal injury and hibernators show increased tolerance to ischemic insults during hibernation period. To understand the molecular changes of retina in response to hibernation we applied transcriptomic analysis to explore the changes of gene expression of 13-lined ground squirrel retinas during hibernation.

Organism:

Ictidomys tridecemlineatus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL22929

10 Samples

Download data: TXT

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Urocitellus parryii; Mus musculus

Type:

Non-coding RNA profiling by array; Non-coding RNA profiling by high throughput sequencing

Platforms:

GPL7732 GPL9863

6 Samples

Download data: TXT

(Submitter supplied) 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. more...

Organism:

Urocitellus parryii

Type:

Non-coding RNA profiling by high throughput sequencing

Platform:

GPL9863

3 Samples

Download data: TXT

(Submitter supplied) 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. more...

Organism:

Mus musculus; Urocitellus parryii

Type:

Non-coding RNA profiling by array

Platform:

GPL7732

3 Samples

Download data: TXT