![](/images/graphics-bg.png)
Transcriptional Activation of p53 during Cold Induced Torpor in the 13-Lined Ground Squirrel Ictidomys tridecemlineatus
Joint Authors
Hefler, Joshua
Wu, Cheng-Wei
Storey, Kenneth B.
Source
Biochemistry Research International
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-12-30
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The transcription factor p53 is located at the centre of multiple pathways relating the cellular response to stress.
Commonly known as a tumor suppressor, it is responsible for initiating diverse actions to protect the integrity of the genome, ranging from cell cycle arrest to apoptosis.
This study investigated the regulation of p53 protein in hibernating 13-lined ground squirrel Ictidomys tridecemlineatus during multiple stages of the torpor-arousal cycle.
Transcript and protein levels of p53 were both elevated in the skeletal muscle during early and late torpor stages of the hibernation cycle.
Nuclear localization of p53 was also increased during late torpor, and this is associated with an increase in its DNA binding activity and expression of p53 transcriptional targets p21CIP, gadd45α, and 14-3-3σ.
The increase in p53 transcriptional activity appears to be independent of its phosphorylation at Ser-15, Ser-46, and Ser-392, consistent with an absence of checkpoint kinase activation during torpor.
Sequence analysis revealed unique amino acid substitutions in the ground squirrel p53 protein, which may contribute to an increase in protein stability compared to nonhibernators.
Overall, the study results provided evidences for a potential role of p53 in the protection of the skeletal muscle during torpor.
American Psychological Association (APA)
Hefler, Joshua& Wu, Cheng-Wei& Storey, Kenneth B.. 2015. Transcriptional Activation of p53 during Cold Induced Torpor in the 13-Lined Ground Squirrel Ictidomys tridecemlineatus. Biochemistry Research International،Vol. 2015, no. 2015, pp.1-11.
https://search.emarefa.net/detail/BIM-1057620
Modern Language Association (MLA)
Hefler, Joshua…[et al.]. Transcriptional Activation of p53 during Cold Induced Torpor in the 13-Lined Ground Squirrel Ictidomys tridecemlineatus. Biochemistry Research International No. 2015 (2015), pp.1-11.
https://search.emarefa.net/detail/BIM-1057620
American Medical Association (AMA)
Hefler, Joshua& Wu, Cheng-Wei& Storey, Kenneth B.. Transcriptional Activation of p53 during Cold Induced Torpor in the 13-Lined Ground Squirrel Ictidomys tridecemlineatus. Biochemistry Research International. 2015. Vol. 2015, no. 2015, pp.1-11.
https://search.emarefa.net/detail/BIM-1057620
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1057620