Adrenal Hyperplasia Among Young Women With Polycystic Ovarian Syndrome
Polycystic ovarian syndrome (PCOS) is a heterogeneous group of disorders presenting with
hyperandrogenism in adolescents and young women. The etiology of this condition remains
unknown, despite its many identified links to insulin resistance, hypertension and metabolic
syndrome, as well as its potential connection to the various forms of congenital adrenal
hyperplasia (CAH).
The adrenal glands are the only source in the body of adrenocortical steroids. In normal
physiology, the pituitary hormone ACTH regulates the secretion of glucocorticoids, while the
secretion of mineralocorticoids is controlled by the renin-angiotensin system. In addition
to these two steroids, the adrenal gland secretes lesser amounts of intermediate metabolites
of these steroids, as well as the sex-steroids DHEA, DHEAS, androstenedione, testosterone,
estrogen, and estrone. Dysregulated secretion of any of these hormones can be caused by the
development of hyperplasia of the adrenocortical tissue, which may be mild and lead to
specific clinical syndromes depending on the identity of the secreted hormones. Bilateral
adrenocortical hyperplasia (BAH) is now an increasingly diagnosed cause of adrenal
dysfunction.
We propose that there is a subgroup of patients with PCOS who actually have non-CAH primary
forms of BAH. To investigate this possibility, we propose to study the
hypothalamic-pituitary-adrenal axis (HPAA) over the next 2 years in 120 young girls and
women (ages 16 to 25 years) that we will compare to 30 age- and race-matched normal females.
Patients will be recruited primarily (although not exclusively) from a busy New York City
clinic run by the Pediatric Endocrine Division at the Infants and Children's Hospital of
Brooklyn at Maimonides and SUNY Downstate. All patients will undergo standard testing of the
HPAA including oral low- and high-dose dexamethasone (DEX)-suppression testing (Liddle's
test). Paradoxical rise of cortisol and/or other steroid metabolites in response to DEX is
considered a sensitive test for the diagnosis of BAH. Patients with such responses will be
molecularly investigated for the known causes of BAH (GNAS, PRKAR1A, PDE11A, PDE8B and other
mutations).
The first goal of this study is to identify any possible contributions of the BAH phenotypes
and genotypes to the pathophysiology of PCOS, a yet unknown factor in the etiology of this
multifaceted disorder. The second goal is to perform a comparative analysis of the
expression of large sets of genes in cells of these patients using gene arrays and other
genetic analyses. This study will generate important information about the molecular
pathways that are affected in this subgroup of patients with PCOS. Thirdly, this study will
also allow for the collection of DNA from affected and non-affected relatives of the
patients to perform genetic studies and identify causative genetic defects. Finally, the
study is expected to lead to new diagnostic and therapeutic methods for at least certain
forms of PCOS.
Observational
Time Perspective: Prospective
Maya B Lodish, M.D.
Principal Investigator
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
United States: Federal Government
110119
NCT01313455
March 2011
Name | Location |
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National Institutes of Health Clinical Center, 9000 Rockville Pike | Bethesda, Maryland 20892 |