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A Microdeletion in the Ligand Binding Domain of Human Steroidogenic Factor 1 Causes XY Sex Reversal without Adrenal Insufficiency

A Microdeletion in the Ligand Binding Domain of Human Steroidogenic Factor 1 Causes XY Sex Reversal without Adrenal Insufficiency

Authors :
William E. Rainey
Nathan C. Bingham
Ana Elisa C. Billerbeck
Berenice B. Mendonca
Keith L. Parker
Sorahia Domenice
Rafaela Vieira Correa
Source :
The Journal of Clinical Endocrinology & Metabolism. 89:1767-1772
Publication Year :
2004
Publisher :
The Endocrine Society, 2004.

Abstract

Steroidogenic factor 1 (SF-1) is an orphan nuclear receptor that plays key roles in endocrine development and function. Knockout mice lacking SF-1 have adrenal and gonadal agenesis, impaired gonadotropin expression, and structural abnormalities of the ventromedial hypothalamic nucleus. Previous studies have identified three human subjects with mutations in SF-1 causing adrenocortical insufficiency with varying degrees of gonadal dysfunction. We now describe a novel 8-bp microdeletion of SF-1, isolated from a 46, XY patient who presented with gonadal agenesis but normal adrenal function, which causes premature termination upstream of sequences encoding the activation function 2 domain. In cell transfection experiments, the mutated protein possessed no intrinsic transcriptional activity but rather inhibited the function of the wild-type protein in most cell types. To our knowledge, this is the first example of an apparent dominant-negative effect of a SF-1 mutation in humans. These findings, which define a SF-1 mutation that apparently differentially affects its transcriptional activity in vivo in the adrenal cortex and the gonads, may be relevant to the cohort of patients who present with 46, XY sex reversal but normal adrenal function.

Details

ISSN :
19457197 and 0021972X
Volume :
89
Database :
OpenAIRE
Journal :
The Journal of Clinical Endocrinology & Metabolism
Accession number :
edsair.doi.dedup.....6c3f205b62c56f93422eccd680feb6e1
Full Text :
https://doi.org/10.1210/jc.2003-031240