Severe fatigue in patients with adrenal insufficiency: physical, psychosocial and endocrine determinants

Posted on March 25, 2014 by MaryO
Giebels V1, Repping-Wuts H, Bleijenberg G, Kroese JM, Stikkelbroeck N, Hermus A.

Author information

Abstract

BACKGROUND:

Fatigue is a frequently experienced complaint in patients with adrenal insufficiency (AI) and may be influenced by cortisol levels.

AIM:

The objective of this study was to determine the prevalence of severe fatigue in adrenal insufficiency (AI) patients, to assess which dimensions contribute to fatigue severity and to determine the association between salivary cortisol levels and momentary fatigue.

SUBJECTS AND METHODS:

We performed a cross-sectional study in the outpatient department of a university hospital. Included were 27 patients with congenital adrenal hyperplasia (CAH), 26 patients with primary AI (PAI), 24 patients with secondary AI (SAI) and 31 patients with adrenal insufficiency after treatment for Cushing’s syndrome (Cush-AI). Measurements included computerised questionnaires to determine fatigue severity and physical and psychosocial contributors. Patients took four saliva samples at home, in which cortisol levels were measured.

RESULTS:

Severe fatigue was experienced by 41 % of the CAH patients, 42 % of the PAI patients, 50 % of the SAI patients and 42 % of the Cush-AI patients. Psychological distress, functional impairment, sleep disturbance, physical activity, concentration problems and social functioning contributed to the subjective experience of fatigue. Salivary cortisol levels were not correlated with momentary fatigue.

CONCLUSIONS:

A considerable proportion of AI patients experience severe fatigue. Salivary cortisol level is not a significant predictor for momentary fatigue in AI patients.

PMID:
24615365
[PubMed – in process]

From http://www.ncbi.nlm.nih.gov/pubmed/24615365

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The Role of Adrenal Scintigraphy in the Diagnosis of Subclinical Cushing’s Syndrome and the Prediction of Post-surgical Hypoadrenalism

Posted on March 25, 2014 by MaryO

World J Surg. 2014 Mar 11. [Epub ahead of print]

Ricciato MP1, Di Donna V, Perotti G, Pontecorvi A, Bellantone R, Corsello SM.

Author information

Abstract

BACKGROUND:

Management of subclinical Cushing’s syndrome (SCS) remains controversial; it is not possible to predict which patients would benefit from adrenalectomy. In the present study we aimed to evaluate the role of adrenocortical scintigraphy (ACS) in the management of patients with SCS.

METHODS:

The medical records of 33 consecutive patients with adrenal “incidentaloma” and proven or suspected SCS who underwent 131I-19-iodocholesterol ACS between 2004 and 2010 were reviewed. Sixteen underwent laparoscopic adrenalectomy (surgical group-S-group) and 17 were medically managed (medical group-M-group). Follow-up evaluation was obtained by outpatient consultation.

RESULTS:

Overall 25 patients (15 in the S-group and 10 in the M-group) had concordant unilateral uptake at ACS (ACS+). In the S-group, the mean follow-up duration was 30.9 ± 16.1 months and, irrespective of the presence of hormonal diagnosis of SCS, in patients who were ACS+ adrenalectomy resulted in a significant increase in HDL cholesterol and decreases in body mass index, glycemia, and blood pressure (BP). One patient reduced antihypertensive medication and three others were able to discontinue it altogether. Prolonged postoperative hypoadrenalism (PH) occurred in 14 patients in the S-group. The overall accuracy in predicting PH was 93.7 % for ACS and 68.7 % for laboratory findings. In the M-group, the mean follow-up duration was 31.5 ± 26.3 months and no patient developed overt Cushing’s syndrome, although ACS+ patients experienced a worsening in glycemia and diastolic BP.

CONCLUSIONS:

Adrenal scintigraphy seems the most accurate diagnostic test for SCS. It is able to predict the metabolic outcome and the occurrence of PH, identifying the patients who could benefit from adrenalectomy irrespective of hormonal diagnosis.

PMID:
24615601
[PubMed – as supplied by publisher]

From http://www.ncbi.nlm.nih.gov/pubmed/24615601

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Salivary cortisol performs better than urinary free cortisol to diagnose Cushing’s syndrome

Posted on March 25, 2014 by MaryO

Late-night salivary cortisol has a better performance than urinary free cortisol in the diagnosis of Cushing’s syndrome.

Salimetrics highlights a recent study:  Abstract

Context: The comparison of variability, reproducibility, and diagnostic performance of late-night salivary cortisol (LNSF) and urinary free cortisol (UFC) using concurrent and consecutive samples in Cushing’s syndrome (CS) is lacking.

Objectives, Patients and Methods: In a prospective study, we evaluate three simultaneous and consecutive samples of LNSF by RIA and UFC by LC-MS/MS in Cushing’s disease (CD; n=43), adrenal CS patients (n=9) and obese subjects (n=18) in order to compare their diagnostic performances. In CS patients we also performed a modified Cushing’s syndrome severity index (CSI).

Results: There was no difference in the coefficient of variation (%) between LNSF and UFC among the three samples obtained for each patient with CD (35±26vs31±24), adrenal CS (28±14vs22±14) and obesity (39±37vs48±20). LNSF confirmed the diagnosis of hypercortisolism even in the presence of normal UFC in 17.3% of CS, whereas the inverse situation was not observed for UFC. The area under the ROC curves for LNSF was 0.999 (95%CI 0.990-1.00) and for UFC was 0.928 (95%CI 0.809- 0.987). The ratio between AUCs was 0.928 (95%CI 0.810-0.988) indicating better performance of LNSF than UFC in diagnosing CS. There was no association between the severity of CSI and the degree of biochemical hypercortisolism.

Conclusion: Our data show that despite similar variability between both methods, LNSF has a superior diagnostic performance than UFC and should be used as the primary biochemical diagnostic test for Cushing’s syndrome diagnosis.

Authors Elias P, Martinez E, Barone B, Mermejo L, Castro M, Moreira A
Division of Endocrinology-Department of Medicine and Division of Statistics- Department of Social Medicine, Ribeirao Preto Medical School – University of Sao Paulo, Ribeirao Preto, SP- Brazil
LINK to Paper
Salimetrics guide to Cortisol
LINK to Salimetrics Diagnostic Salivary Cortisol Assay

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Through The Art Of Makeup, People With Rare Pituitary Disorders Now Have Unique Resources To Help Address Common Physical And Emotional Changes

Posted on March 24, 2014 by MaryO

Did you know that applying contour powder on certain areas of your face, like the outer rim of the jaw, along the hairline or along the hollows of the cheek, can help make enlarged features less noticeable? Seems like a basic makeup tip, right? Well, to a person with a pituitary disorder that dramatically changes one’s facial features, this type of information may make a major difference – not only physically, but also psychologically.

This is why Novartis has teamed up with Kevyn Aucoin Beauty (KAB) to bring The Highlights Project to those living with acromegaly and Cushing’s disease. The program offers a variety of virtual tools such as makeup suggestions from professional artists and video demonstrations. These resources address common concerns expressed by patients while also educating about these rare, but serious pituitary disorders.

Kevyn Aucoin, founder of KAB and famed Hollywood makeup legend, was diagnosed with acromegaly in 2001 at the age of 40 and passed away less than 12 months later. Aucoin believed in the transformative nature of makeup and saw it as a reflection of both inner and outer beauty. In this spirit, The Highlights Project features a series of makeup tutorials, tips and inspirations designed to help enhance the self-image of pituitary patients. The program also includes the perspective of a psychotherapist who specializes in helping patients with acromegaly and Cushing’s disease.

Like so many other people with acromegaly and Cushing’s disease, Kevyn went undiagnosed for years and faced both emotional and physical challenges as a result of his condition. “Through Kevyn Aucoin Beauty’s partnership with Novartis on The Highlights Project, we hope that we can inspire others living with these pituitary disorders to see their own beauty and view makeup as Kevyn did, not as a mask, but as a tool for discovery,” said Desiree Tordecilla, Executive Vice President, Kevyn Aucoin Beauty.

Acromegaly and Cushing’s disease are pituitary disorders caused by the presence of a noncancerous tumor on the pituitary gland. The symptoms often include highly visual physical changes in the body. For people with acromegaly, enlarged facial features, jaw and brow protrusions, thickening of the skin and skin tags are common. People with Cushing’s disease frequently experience uncontrollable weight gain, facial fullness and redness, a buffalo hump, acne and oily skin. Beyond the external physical changes, these conditions often also cause serious health complications such as cardiovascular issues, fatigue, muscle weakness and cognitive changes. Those living with uncontrolled acromegaly and Cushing’s disease are also at an increased risk of death. Due to the rare nature of these diseases, receiving an accurate diagnosis can be difficult and may take several years – therefore, education and awareness is critical.

The Highlights Project aims to provide support and help those with acromegaly and Cushing’s disease manage the physical manifestations and psychosocial challenges often associated with these conditions.

“As someone who was self-conscious about how unfeminine my facial features appeared, I was amazed by the impact the simple makeup tricks I picked up from The Highlights Project had on my self-esteem,” said Shannon Goodson, who was diagnosed with acromegaly in 2008. “Staying positive, educating yourself about the condition and monitoring hormone levels to ensure the disease is under control are the first steps to empowering yourself and understanding that you are so much more than your diagnosis.”

The mission of The Highlights Project is to help put a face to the challenges those with acromegaly and Cushing’s disease may encounter and serve as a vessel for learning. Novartis is committed to helping to transform the care of rare pituitary conditions and bringing meaningful solutions to patients. To help support acromegaly and Cushing’s disease patients, and learn more about The Highlights Project, visit TheHighlightsProject.com. For more information about these diseases, visit AcromegalyInfo.com and CushingsDisease.com.
Read more from Journal Sentinel: http://www.jsonline.com/sponsoredarticles/health-wellness/through-the-art-of-makeup-people-with-rare-pituitary-disorders-now-have-unique-resources-to-help-address-common-physical-and-emotional-changes8087390808-251841151.html#ixzz2wtDUV9iF

 

Filed under: Cushing's, pituitary, Rare Diseases | Tagged: , , , , , , , , , , , , , , , , , | Leave a comment »

Mutations in PKA catalytic subunit associated with Cushing’s syndrome

Posted on March 18, 2014 by MaryO

1. Somatic mutations resulting in constitutive activation of PRKACA, which encodes the catalytic subunit of protein kinase A, were found in 37% of patients with Cushing’s syndrome due to an adrenal adenoma. 

2. Germline duplications of PRKACA were detected in patients with bilateral adrenal hyperplasia and overt Cushing’s syndrome. 

Study Rundown: This study found that 37% of patients with overt Cushing’s syndrome due to an adrenal adenoma have a somatic mutation in PRKACA, which encodes the catalytic subunit of cyclic AMP-dependent protein kinase A (PKA), present in their tumor cells. The most commonly identified variant, Leu206Arg, results in impaired interaction between the catalytic and regulatory subunits of PKA, thereby causing constitutive activation of PKA. Additionally, a subset of patients with cortisol-producing bilateral adrenal hyperplasia harbored germline duplications of PRKACA.

This is the first study to identify an association between genetic alterations of the catalytic subunit of PKA and Cushing’s syndrome. It is significant that 37% of patients with overt Cushing’s syndrome were found to have tumors with PRKACA mutations; previous research had revealed only very rare mutations. Of note, this study did not find PRKACA mutations in any patients with subclinical Cushing’s syndrome or inactive adenomas. This suggests that Cushing’s syndrome and subclinical Cushing’s are distinct entities. Patients involved in this study were recruited from only three centers; the frequency of PRKACA mutations in Cushing’s syndrome may be different in other study populations. Further research will be needed to identify biochemical causes of overt Cushing’s syndrome in patients without PRKACA mutations.

Relevant Reading: Abnormalities of cAMP signaling are present in adrenocortical lesions associated with ACTH-independent Cushing’s syndrome despite the absence of mutations in known genes

In-Depth: In this study, exome sequencing of tumor specimens from 10 patients with unilateral cortisol-producing adenomas and overt Cushing’s syndrome was performed. Eight of 10 adenomas had somatic mutations in PRKACA; 7 of these patients had the same mutation (p.Leu206Arg). Subsequently, PRKACA was sequenced in 129 additional patients with adrenal adenomas. Patients were classified as having overt Cushing’s syndrome (at least three abnormal biochemical tests or catabolic features plus two abnormal tests), subclinical Cushing’s (at least one abnormal biochemical test without catabolic signs) or as having an inactive adenoma. The Leu206Arg variant was identified in tumor tissue of 14/129 patients and all 14 had overt Cushing’s syndrome. Overall, 37% (22/59) of patients with overt Cushing’s syndrome due to an adenoma had a PRKACA mutation; in contrast, PRKACA mutations were not found in any patients with subclinical Cushing’s or an inactive adenoma. Of 35 patients with overt Cushing’s syndrome due to cortisol-secreting bilateral adrenal hyperplasia, 5 patients had copy-number gains of a region on chromosome 19p that contains PRKACA.

Analysis of holoenzyme structure revealed that the Leu206Arg mutation is located in the active-site cleft of the catalytic subunit of PKA. To evaluate the functional consequences of this mutation, cells were transfected with either nonmutant or variant C-alpha, which encodes the catalytic subunit of PKA. Investigators determined that the mutation causes constitutive activation of the catalytic subunit by impairing interaction with the regulatory subunit of PKA.

From http://www.2minutemedicine.com/mutations-in-pka-catalytic-subunit-associated-with-cushings-syndrome/

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