Journal
SCIENTIFIC REPORTS
Volume 11, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41598-021-03451-0
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- Semmelweis University
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Glucocorticoids, through their receptor GR, play a central role in regulating inflammatory responses and alleviating symptoms in critically ill patients. Different splice variants of GR, including cGRα and cGR-P, are expressed in response to stress, with elevated levels associated with increased survival rates, underscoring the importance of total GR expression in disease outcomes.
Glucocorticoids play a central role in the inflammatory response and alleviate the symptoms in critically ill patients. The glucocorticoid action relies on the glucocorticoid receptor (GR) which translocates into the nucleus upon ligand-binding and regulates transcription of a battery of genes. Although the GR is encoded by a single gene, dozens of its splice variants have been described in diverse species. The GR alpha isoform encodes the full, functionally active protein that is composed of a transactivation, a DNA-binding, and a C-terminal ligand-binding domain. The second most highly expressed receptor variant, the GR-P, is formed by an intron retention that introduces an early stop codon and results in a probably dysfunctional protein with truncated ligand-binding domain. We described the canine ortholog of GR-P and showed that this splice variant is highly abundant in the peripheral blood of dogs. The level of cGR alpha and cGR-P transcripts are elevated in patients of SIRS and the survival rate is increased with elevated cGR alpha and cGR-P expression. The ratio of cGR alpha and cGR-P mRNA did not differ between the survivor and non-survivor patients; thus, the total GR expression is more pertinent than the relative expression of GR isoforms in assessment of the disease outcome.
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