The dexamethasone-suppressed corticotropin-releasing hormone stimulation test and the desmopressin test to distinguish Cushing's syndrome from pseudo-Cushing's states

Plain-language guide to PMID 17223996 (2007): randomized controlled trial study of ACTH (Corticotropin) and CRH (Corticotropin-Releasing Hormone) in 32 patients.

Key Facts

PMID: 17223996
Journal: Clinical endocrinology
Year: 2007
Study type: Randomized Controlled Trial
Authors: Pecori Giraldi F et al. (10 authors)
DOI: 10.1111/j.1365-2265.2006.02717.x

What This Study Did, in Plain Language

What Was Tested

The paper reports a study of ACTH (Corticotropin) and CRH (Corticotropin-Releasing Hormone), published as a randomized controlled trial.

Cushing's syndrome (CS), when fully expressed, is easily diagnosed.

Mild cases, however, may require careful distinction from pseudo-Cushing's states as may occur in depression, alcoholism, polycystic ovary disease and visceral obesity.

Who Took Part

The abstract describes 32 patients taking part.

By PubMed's age tags, the people studied were children, teenagers, adults and middle-aged adults, both men and women.

The study population comprised 32 patients with CS and 23 with pseudo-Cushing's evaluated retrospectively.

Further, patients were tested with dexamethasone + CRH and desmopressin and the diagnostic performances of the two tests were compared in the entire series as well as in patients with mild hypercortisolism only (i.e.

How the Study Was Run

In design terms this was a randomized study.

Random assignment meant chance, not the researchers, decided who got ACTH (Corticotropin) and who got the comparison, which limits bias.

What Was Measured

Topics PubMed links to this paper include Adrenocorticotropic Hormone, Chi-Square Distribution, Corticotropin-Releasing Hormone, Cushing Syndrome, Deamino Arginine Vasopressin, Dexamethasone and Glucocorticoids.

What This Means in Plain Language

The paper is a randomized study of ACTH (Corticotropin) and CRH (Corticotropin-Releasing Hormone) in 32 patients.

With fewer than 40 people, it is a small study, so it is better read as an early signal for further research than as a settled answer.

Its findings take up roughly 9 sentences of the abstract and are left out here on purpose; the source paper is the place to read them.

The publication is from 2007 (Clinical endocrinology), a journal based in England.

More context: the ACTH (Corticotropin) compound page and the CRH (Corticotropin-Releasing Hormone) compound page, all human trials.

Our Notes on the Compounds

ACTH (Corticotropin): The 39-amino-acid pituitary hormone that drives cortisol production; given as repository corticotropin (Acthar Gel).

CRH (Corticotropin-Releasing Hormone): The 41-amino-acid hypothalamic hormone that triggers ACTH release; corticorelin is used diagnostically.

Desmopressin: A synthetic vasopressin analog (DDAVP) used for bedwetting, diabetes insipidus and some bleeding disorders.

Source: PubMed record. This explanation is written by PeptideWhiz from the public record. For research and education only. Not medical advice; no dosing information is given.