Metabolomic Biomarkers in Urine of Cushing’s Syndrome Patients

Posted on January 29, 2026 by MaryO
Int. J. Mol. Sci. 2017, 18(2), 294; doi:10.3390/ijms18020294 (registering DOI)

Alicja Kotłowska 1,* , Tomasz Puzyn 2, Krzysztof Sworczak 3, Piotr Stepnowski 4 and Piotr Szefer 1

1 Department of Food Sciences, Faculty of Pharmacy, Medical University of Gdańsk, Al. Gen. J. Hallera 107, 80-416 Gdańsk, Poland
2 Laboratory of Environmental Chemometrics, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
3 Department of Endocrinology and Internal Medicine, Medical University of Gdańsk, ul. Dębinki 7, 80-211 Gdańsk, Poland
4 Department ofEnvironmental Analytics, Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
* Author to whom correspondence should be addressed.
Academic Editor: Ting-Li (Morgan) Han
Received: 5 December 2016 / Revised: 9 January 2017 / Accepted: 19 January 2017 / Published: 29 January 2017
(This article belongs to the Section Molecular Diagnostics)
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Abstract

Cushing’s syndrome (CS) is a disease which results from excessive levels of cortisol in the human body. The disorder is associated with various signs and symptoms which are also common for the general population not suffering from compound hypersecretion. Thus, more sensitive and selective methods are required for the diagnosis of CS.

This follow-up study was conducted to determine which steroid metabolites could serve as potential indicators of CS and possible subclinical hypercortisolism in patients diagnosed with so called non-functioning adrenal incidentalomas (AIs).

Urine samples from negative controls (n = 37), patients with CS characterized by hypercortisolism and excluding iatrogenic CS (n = 16), and patients with non-functioning AIs with possible subclinical Cushing’s syndrome (n = 25) were analyzed using gas chromatography-mass spectrometry (GC/MS) and gas chromatograph equipped with flame ionization detector (GC/FID). Statistical and multivariate methods were applied to investigate the profile differences between examined individuals. The analyses revealed hormonal differences between patients with CS and the rest of examined individuals.

The concentrations of selected metabolites of cortisol, androgens, and pregnenetriol were elevated whereas the levels of tetrahydrocortisone were decreased for CS when opposed to the rest of the study population. Moreover, after analysis of potential confounding factors, it was also possible to distinguish six steroid hormones which discriminated CS patients from other study subjects.

The obtained discriminant functions enabled classification of CS patients and AI group characterized by mild hypersecretion of cortisol metabolites. It can be concluded that steroid hormones selected by applying urinary profiling may serve the role of potential biomarkers of CS and can aid in its early diagnosis.

 

Keywords: Cushing’s syndrome; metabolomics; multivariate analysis; biomarkers; steroid hormones; urinary profiling; gas chromatography; linear discriminant analysis
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

From http://www.mdpi.com/1422-0067/18/2/294

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Froedtert and MCW researchers investigate Cushing syndrome incidence in bariatric surgery patients

Posted on January 29, 2026 by MaryO

Researchers at the Medical College of Wisconsin determined that Cushing syndrome, an endocrine disorder, may be the potential cause for weight gain and metabolic complications for patients who have undergone bariatric surgery for obesity. The study, published in the journal Obesity Surgery, was conducted by Ty B. Carroll, MD, assistant professor of endocrinology; James W. Findling, MD, FACP, professor of endocrinology ; and Bradley R. Javorsky, MD, assistant professor of endocrinology. The physicians practice at Froedtert Hospital in Wauwatosa and Community Memorial Hospital in Menomonee Falls.

Cushing syndrome can occur when the human body is exposed to high levels of cortisol for an extended period of time. Cortisol is a hormone in the body which affects blood pressure regulation and cardiovascular system functions. Cortisol also helps regulate the body’s conversion of proteins, carbohydrates and fats from diet into usable energy. However, when the level of cortisol becomes too high, Cushing syndrome can develop.

Cushing syndrome is associated with a variety of symptoms including weight gain and fatty tissue deposits in the body. According to the American Association of Neurological Surgeons, 10 to 15 million people are affected each year by Cushing syndrome.

Bariatric surgery is a procedure performed to help with extreme cases of obesity. Weight loss is achieved by reducing the size of the stomach with a gastric band, removal of a portion of the stomach or resecting and rerouting the small intestine to a small stomach pouch. Bariatric surgery is often used as an option for individuals unable to lose weight through diet and exercise, or have serious health problems caused by obesity.

According to the American Society for Metabolic and Bariatric Surgery, 179,000 bariatric surgeries were performed in the U.S. in 2013. However, despite successes in normal weight loss cases, bariatric surgery does not provide long term weight loss for individuals diagnosed with Cushing syndrome. Cushing syndrome often goes undiagnosed as a potential cause for weight gain and metabolic complications until after the surgery is performed.

MCW researchers in this study analyzed the incidence of Cushing syndrome in patients who underwent bariatric surgery for weight loss. During the investigation, the researchers performed a retrospective chart review on a series of 16 patients diagnosed with Cushing syndrome from five tertiary care centers in the U.S. who underwent bariatric surgery. The results from the study found 12 of the analyzed patients were not diagnosed with Cushing syndrome prior to their bariatric surgery. The remaining four patients had Cushing syndrome surgery prior to bariatric surgery, without recognition that their Cushing syndrome was persistent until after the weight loss surgery. The findings from the research indicate that Cushing syndrome may be often overlooked in patients undergoing bariatric surgery.

According to the researchers, testing for Cushing syndrome should be performed prior to bariatric surgery in patients with persistent hypertension, diabetes mellitus or excessive weight regain.

From http://www.lakecountrynow.com/usersubmittedstories/366480371.html

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