Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Reduced Androgen Receptor Expression in Genital Skin Fibroblasts From Patients With 45,X/46,XY Mosaicism
Ist Teil von
The journal of clinical endocrinology and metabolism, 2019-10, Vol.104 (10), p.4630-4638
Ort / Verlag
Washington, DC: Endocrine Society
Erscheinungsjahr
2019
Quelle
Oxford Journals 2020 Medicine
Beschreibungen/Notizen
Abstract
Context
Molecular mechanisms causing the broad phenotypic diversity of external masculinization in individuals with 45,X/46,XY mosaicism are poorly understood.
Objective
Analysis of androgen receptor (AR) expression and function as a putative influencing factor for the genital phenotype in patients with 45,X/46,XY mosaicism.
Design
Measurement of AR mRNA expression levels, AR activity [DHT-mediated APOD (apolipoprotein D) induction] and cellular 45,X/46,XY ratios in genital skin fibroblasts from individuals with 45,X/46,XY mosaicism and male reference individuals, and determination of the external virilization scale from individuals with 45,X/46,XY mosaicism.
Setting
University hospital endocrine research laboratory.
Patients or Other Participants: 30 genital skin fibroblast cultures (GFs) from male reference individuals and 15 GFs from individuals with 45,X/46,XY mosaicism.
Intervention
None
Main Outcome Measures
Determination of AR mRNA expression and AR activity in male reference GFs and 45,X/46,XY GFs and correlation of the obtained data with the cellular 45,X/46,XY ratios and the patients’ external virilization scale.
Results
In 6 of 15 45,X/46,XY GFs, AR mRNA expression and AR activity were significantly lower compared with those in the 46,XY reference GFs. In this subgroup of reduced AR mRNA expression, a positive trend was seen between AR mRNA expression and the percentage of XY-positive cells. Furthermore, we found a positive correlation between AR activity and the external virilization scale in the 15 45,X/46,XY GF samples (P = 0.03).
Conclusion
Our results suggest that AR expression and AR activity might influence the phenotypic variability seen in patients with 45,X/46,XY mosaicism.
AR expression and function can be reduced in the genital target tissue of patients with 45,X/46,XY mosaicism, and AR function will correlate with the patients’ external virilization.