Metabolic syndrome and cardiovascular morbidity in patients with congenital adrenal hyperplasia

Phase 3 Trial of Crinecerfont in Adult Congenital Adrenal Hyperplasia

BACKGROUND

Adrenal insufficiency in patients with classic 21-hydroxylase deficiency congenital adrenal hyperplasia (CAH) is treated with glucocorticoid replacement therapy. Control of adrenal-derived androgen excess usually requires supraphysiologic glucocorticoid dosing, which predisposes patients to glucocorticoid-related complications. Crinecerfont, an oral corticotropin-releasing factor type 1 receptor antagonist, lowered androstenedione levels in phase 2 trials involving patients with CAH.

METHODS

In this phase 3 trial, we randomly assigned adults with CAH in a 2:1 ratio to receive crinecerfont or placebo for 24 weeks. Glucocorticoid treatment was maintained at a stable level for 4 weeks to evaluate androstenedione values, followed by glucocorticoid dose reduction and optimization over 20 weeks to achieve the lowest glucocorticoid dose that maintained androstenedione control (≤120% of the baseline value or within the reference range). The primary efficacy end point was the percent change in the daily glucocorticoid dose from baseline to week 24 with maintenance of androstenedione control.

RESULTS

All 182 patients who underwent randomization (122 to the crinecerfont group and 60 to the placebo group) were included in the 24-week analysis, with imputation of missing values; 176 patients (97%) remained in the trial at week 24. The mean glucocorticoid dose at baseline was 17.6 mg per square meter of body-surface area per day of hydrocortisone equivalents; the mean androstenedione level was elevated at 620 ng per deciliter. At week 24, the change in the glucocorticoid dose (with androstenedione control) was -27.3% in the crinecerfont group and -10.3% in the placebo group (least-squares mean difference, -17.0 percentage points; P<0.001). A physiologic glucocorticoid dose (with androstenedione control) was reported in 63% of the patients in the crinecerfont group and in 18% in the placebo group (P<0.001). At week 4, androstenedione levels decreased with crinecerfont (-299 ng per deciliter) but increased with placebo (45.5 ng per deciliter) (least-squares mean difference, -345 ng per deciliter; P<0.001). Fatigue and headache were the most common adverse events in the two trial groups.

CONCLUSIONS

Among patients with CAH, the use of crinecerfont resulted in a greater decrease from baseline in the mean daily glucocorticoid dose, including a reduction to the physiologic range, than placebo following evaluation of adrenal androgen levels. (Funded by Neurocrine Biosciences; CAHtalyst ClinicalTrials.gov number, NCT04490915.).

Current Advances in the Management of Congenital Adrenal Hyperplasia

Congenital adrenal hyperplasia (CAH) is an autosomal recessive genetic condition caused by various enzyme deficiencies that result in disruptions of pathways of adrenal steroidogenesis. 21-hydroxylase deficiency is the most common form of CAH and has a variable phenotype which ranges a spectrum, from the most severe salt-wasting type to the simple-virilizing type and the least severe nonclassical form. Patients with CAH are at risk for various comorbidities due to the underlying adrenal hormone production imbalance as well as the treatment of the condition, which typically includes supraphysiologic glucocorticoid dosing. Children and adults require frequent monitoring and careful medication dosing adjustment. However, there are multiple novel therapies on the horizon that offer promise to patients with CAH in optimizing their treatment regimens and reducing the risk of comorbidities.

Endocrine, cardiac and neuropsychological aspects of adult congenital adrenal hyperplasia

OBJECTIVE

To investigate the metabolic, cardiovascular, and neuropsychological phenotype, quality of life (QoL), and hormonal regulation in individuals with congenital adrenal hyperplasia (CAH), a group of autosomal recessive disorders characterized by impaired synthesis of cortisol in the adrenal cortex and, if untreated compensatory hyperandrogenism. CAH is associated with an increased cardiovascular and metabolic morbidity, possibly due to overtreatment with glucocorticoids, leading to weight gain, insulin resistance, and metabolic syndrome.

DESIGN, PARTICIPANTS, MEASUREMENTS

Thirty-seven individuals with CAH and 33 age- and sex-matched controls were evaluated at a single centre at Aarhus University Hospital with echocardiography, electrocardiogram, 24-h blood pressure, biochemistry, anthropometrics, and autism spectrum, anxiety, depression, personality, cognitive failures, and QoL were assessed using questionnaires.

RESULTS

CAH individuals had lower height than controls (170.5 vs. 182.9 cm in males and 160.2 vs. 170.1 cm in females, p < 0.01). Compared with female controls, females with CAH had higher haemoglobin (8.8 vs. 8.2 mmol/L, p = 0.003) and BMI (29.7 vs. 25.5 kg/m2, p = 0.006), reduced insulin sensitivity (HOMA-IR): 2.7 vs. 1.9, p = 0.018), prolonged E-wave deceleration time (193 vs. 174 cm, p = 0.015), and E/é ratios (5.4 vs. 4.5, p = 0.017), and lower self-reported QoL. Males with CAH had more cognitive complaints (p = 0.034) and higher autistic scores (19.9 vs. 14.9; p = 0.068) compared with male controls. More individuals with CAH than controls reported writing problems.

CONCLUSION

A sex-specific comorbidity profile is evident in CAH, with females presenting with decreased metabolic and overall self-reported health, whereas males with CAH presented with increased cognitive complaints and autistic traits.

Predictors of Cardiovascular Morbidities in Adults With 21-Hydroxylase Deficiency Congenital Adrenal Hyperplasia

CONTEXT

The prevalence of cardiovascular and metabolic complications among adults with 21-hydroxylase deficiency (21OHD) is unknown.

OBJECTIVE

We sought to determine the prevalence of cardiovascular and metabolic morbidities among adults with 21OHD and to identify clinical factors and biomarkers associated with cardiovascular outcomes.

METHODS

A 10-year retrospective cross-sectional analysis was conducted on adult patients with confirmed 21OHD, aged 18 to 70 years, who had at least one clinical visit for assessment at the University of Michigan. The presence of cardiovascular diseases (CVDs) and other metabolic comorbidities was extracted from medical records based on International Classification of Diseases (ICD) codes. Medical treatments, glucocorticoid (GC) and mineralocorticoid doses, as well as specific biomarkers of disease control since age 18, were collected for analysis.

RESULTS

A total of 254 patients with 21OHD, median age of 35 years (interquartile range, 28.25-46 y), were included in the analysis. The prevalence of CVDs in the entire cohort was 7.5%. An increase in prevalence was seen from early adulthood, reaching 25% in patients older than 60 years. Increasing age (adjusted odds ratio [OR], 1.05; 95% CI, 1.01-1.09), hypertension (OR, 4.27; 95% CI, 1.41-12.92), and higher GC doses (OR, 1.51; 95% CI, 1.11-2.06) were significantly associated with prevalent CVDs. Higher plasma renin activity was significantly associated with CVDs (OR, 1.07; 95% CI, 1.01-1.15) but not other biochemical markers of disease.

CONCLUSION

Cardiometabolic morbidities are prevalent among adults with 21OHD. Hypertension, age, and GC exposure are the main predictive factors of established CVDs in our cohort.

Characteristics of Congenital Adrenal Hyperplasia Diagnosed in Adulthood: A Literature Review and Case Series

Congenital adrenal hyperplasia (CAH) is a group of autosomal recessive disorders characterized by impaired cortisol synthesis. CAH, depending on its clinical form, is usually diagnosed in the neonatal period, later in childhood, in adolescence, or in young adults. Herein, we report a case series of eight individuals in whom CAH was diagnosed between the ages of 18 and 81 years.

METHODS

We report on clinical presentations, hormonal tests, adrenal/gonadal imaging, and genetic findings. The clinical data of eight people with CAH, including four women (46, XX) and four men (46, XY), were reviewed. A genetic analysis of the cytochrome P450 family 21 subfamily A member 2 (CYP21A2) gene was performed in six patients. A comprehensive literature review was also conducted.

CASE SERIES

Partial cortisol deficiency was found in all patients. The most frequent genotype was the homozygotic I173N mutation in CYP21A2. Adrenal masses were detected in seven patients, except for the youngest. Most of the patients were of short stature. Hypogonadotropic hypogonadism was detected in two males, and three females presented with primary amenorrhea. Hirsutism was noticeable in three females. All of the patients developed insulin resistance, and half of them were obese.

CONCLUSIONS

The clinical presentations of different forms of CAH overlapped. Genotype-phenotype correlations were strong but not absolute. The management of CAH should be individualized and based on clinical and laboratory findings. Furthermore, the assessment of the cortisol response to adrenocorticotrophic hormone stimulation should be mandatory in all adults with CAH. Additionally, the regular long-term screening of cardiometabolic status is required in the CAH population.

Impact of Glucocorticoids on Cardiovascular System-The Yin Yang Effect

Glucocorticoids are not only endogenous hormones but are also administered exogenously as an anti-inflammatory and immunosuppressant for their long-term beneficial and lifesaving effects. Because of their potent anti-inflammatory property and ability to curb the cytokines, they are administered as lifesaving steroids. This property is not only made use of in the cardiovascular system but also in other major organ systems and networks. There is a fine line between their use as a protective anti-inflammatory and a steroid that could cause overuse-induced complications in major organ systems including the cardiovascular system. Studies conducted in the cardiovascular system demonstrate that glucocorticoids are required for growth and development and also for offering protection against inflammatory signals. Excess or long-term glucocorticoid administration could alter cardiac metabolism and health. The endogenous dysregulated state due to excess endogenous glucocorticoid release from the adrenals as seen with Cushing's syndrome or excess exogenous glucocorticoid administration leading to Cushing's-like condition show a similar impact on the cardiovascular system. This review highlights the importance of maintaining a glucocorticoid balance whether it is endogenous and exogenous in regulating cardiovascular health.