Circulating microRNA Expression in Cushing's Syndrome.

Abstract

Context:

Cushing's syndrome (CS) is a rare disease of endogenous hypercortisolism associated with high morbidity and mortality. Diagnosis and classification of CS is still challenging.

Objective:

Circulating microRNAs (miRNAs) are minimally invasive diagnostic markers. Our aim was to characterize the circulating miRNA profiles of CS patients and to identify distinct profiles between the two major CS subtypes.

Methods:

We included three groups of patients from the German Cushing's registry: ACTH-independent CS (Cortisol-Producing-Adenoma; CPA), ACTH-dependent pituitary CS (Cushing's Disease; CD), and patients in whom CS had been ruled out (controls). Profiling of miRNAs was performed by next-generation-sequencing (NGS) in serum samples of 15 CS patients (each before and after curative surgery) and 10 controls. Significant miRNAs were first validated by qPCR in the discovery cohort and then in an independent validation cohort of 20 CS patients and 11 controls.

Results:

NGS identified 411 circulating miRNAs. Differential expression of 14 miRNAs were found in the pre- and postoperative groups. qPCR in the discovery cohort validated 5 of the significant miRNAs from the preoperative group analyses. Only, miR-182-5p was found to be significantly upregulated in the CD group of the validation cohort. Comparing all CS samples as a group with the controls did not reveal any significant differences in expression.

Outcome:

In conclusion, our study identified miR-182-5p as a possible biomarker for CD, which has to be validated in a prospective cohort. Furthermore, our results suggest that presence or absence of ACTH might be at least as relevant for miRNA expression as hypercortisolism itself.

• Authors: Sharmilee Vetrivel, Ru Zhang, Mareen Engel, Barbara Altieri, Leah Braun, Andrea Osswald, Martin Bidlingmaier, Martin Fassnacht, Felix Beuschlein, Martin Reincke, Alon Chen, Silviu Sbiera, Anna Riester
• Journal: Frontiers in endocrinology (Front Endocrinol (Lausanne)) Vol. 12 Pg. 620012 ( 2021) ISSN: 1664-2392 [Print] Switzerland
• PMID: 33692756 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2021 Vetrivel, Zhang, Engel, Altieri, Braun, Osswald, Bidlingmaier, Fassnacht, Beuschlein, Reincke, Chen, Sbiera and Riester.

Chemical References

• Biomarkers
• Circulating MicroRNA

Topics

• Adenoma (blood, diagnosis)
• Adult
• Biomarkers (blood)
• Circulating MicroRNA (blood)
• Cushing Syndrome (blood, diagnosis)
• Diagnosis, Differential
• Female
• Humans
• Male
• Middle Aged
• Pituitary ACTH Hypersecretion (blood, diagnosis)
• Registries
• Retrospective Studies