Long noncoding RNA GAS5: a novel marker involved in glucocorticoid response.

Area of Science:

• Molecular Biology
• Genetics
• Pharmacology

Background:

• Glucocorticoids (GCs) mediate effects via the glucocorticoid receptor (GR), encoded by the NR3C1 gene.
• GR activation leads to autoregulation through binding to GRE-like elements within its gene.
• Long noncoding RNA GAS5 interacts with activated GR, suppressing its transcriptional activity.

Purpose of the Study:

• To assess the role of GAS5 and NR3C1 gene expression in methylprednisolone's antiproliferative effect.
• To correlate GAS5 and NR3C1 expression with individual sensitivity to GCs.

Main Methods:

• Analysis of GAS5 and NR3C1 gene expression in peripheral blood mononuclear cells (PBMCs).
• Comparison of gene expression levels between good and poor responders to GCs.
• Correlation of gene expression with methylprednisolone sensitivity.

Main Results:

• Individuals classified as poor responders to GCs exhibited significantly higher levels of both GAS5 and NR3C1.
• Elevated GAS5 and NR3C1 expression were observed in subjects with reduced sensitivity to methylprednisolone.

Conclusions:

• Abnormal levels of GAS5 may compromise GC effectiveness.
• GAS5 might interfere with the GR autoregulation mechanism, impacting GC efficacy.
• GAS5 and NR3C1 expression levels could serve as biomarkers for GC response.