Increased Mortality Risk in Patients With Primary and Secondary Adrenal Insufficiency

The Journal of Clinical Endocrinology & Metabolism, dgab096, https://doi.org/10.1210/clinem/dgab096

Abstract

Context

Mortality data in patients with adrenal insufficiency are inconsistent, possibly due to temporal and geographical differences between patients and their reference populations.

Objective

To compare mortality risk and causes of death in adrenal insufficiency with an individually-matched reference population.

Design

Retrospective cohort study.

Setting

UK general practitioner database (CPRD).

Participants

6821 patients with adrenal insufficiency (primary, 2052; secondary, 3948) and 67564 individually-matched controls (primary, 20366; secondary, 39134).

Main outcome measures

All-cause and cause-specific mortality; hospital admission from adrenal crisis.

Results

With follow-up of 40799 and 406899 person-years for patients and controls respectively, the hazard ratio (HR; [95%CI]) for all-cause mortality was 1.68 [1.58 – 1.77]. HRs were greater in primary (1.83 [1.66 – 2.02]) than in secondary (1.52 [1.40 – 1.64]) disease; (HR; primary versus secondary disease, 1.16 [1.03 – 1.30]). The leading cause of death was cardiovascular disease (HR 1.54 [1.32-1.80]), along with malignant neoplasms and respiratory disease. Deaths from infection were also relatively high (HR 4.00 [2.15 – 7.46]). Adrenal crisis contributed to 10% of all deaths. In the first two years following diagnosis, the patients’ mortality rate and hospitalisation from adrenal crisis were higher than in later years.

Conclusion

Mortality was increased in adrenal insufficiency, especially primary, even with individual matching and was observed early in the disease course. Cardiovascular disease was the major cause but mortality from infection was also high. Adrenal crisis was a common contributor. Early education for prompt treatment of infections and avoidance of adrenal crisis hold potential to reduce mortality.

PDF available at https://academic.oup.com/jcem/advance-article-abstract/doi/10.1210/clinem/dgab096/6141434?redirectedFrom=fulltext

New study identifies the main genetic causes of autoimmune Addison’s disease

Novel genetic associations could pave the way for early interventions and personalized treatment of an incurable condition.

Scientists from the University of Bergen (Norway) and Karolinska Institutet (Sweden) have discovered the genes involved in autoimmune Addison’s disease, a condition where the body’s immune systems destroys the adrenal cortex leading to a life-threatening hormonal deficiency of cortisol and aldosterone.

Groundbreaking study

The rarity of Addison’s disease has until now made scanning of the whole genome for clues to the disease’s genetic origins difficult, as this method normally requires many thousands of study participants. However, by combining the world’s two largest Addison’s disease registries, Prof. Eystein Husebye and his team at the University of Bergen and collaborators at Karolinska Institutet in Sweden (prof. Kämpe) were able to identify strong genetic signals associated with the disease. Most of them are directly involved in the development and functioning of the human immune system including specific molecular types in the so-called HLA-region (this is what makes matching donors and recipients in organ transplants necessary) and two different types of a gene called AIRE (which stands for AutoImmune REgulator).

AIRE is a key factor in shaping the immune system by removing self-reacting immune cells. Variants of AIRE, such as the ones identified in this study, could compromise this elimination of self-reacting cells, which could lead to an autoimmune attack later in life.

Knowing what predisposes people to develop Addison’s disease opens up the possibilities of determining the molecular repercussions of the predisposing genetic variation (currently ongoing in Prof. Husebye’s lab). The fact that it is now feasible to map the genetic risk profile of an individual also means that personalised treatment aimed at stopping and even reversing the autoimmune adrenal destruction can become a feasible option in the future.

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Contact information:

Professor at the University of Bergen, Eystein Husebye – Eystein.Husebye@uib.no – cell phone +47 99 40 47 88

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From https://www.eurekalert.org/pub_releases/2021-02/tuob-nsi021221.php

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