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Longitudinal assessment of circulating insulin-like peptide 3 levels in healthy peripubertal girls

Hagen, Casper P.; Mieritz, Mikkel G.; Nielsen, John E.; Anand-Ivell, Ravinder; Ivell, Richard; Juul, Anders

Authors

Casper P. Hagen

Mikkel G. Mieritz

John E. Nielsen

Richard Ivell richard.ivell@nottingham.ac.uk

Anders Juul



Abstract

Objective: To elucidate the natural course of circulating insulin-like peptide 3 (INSL3) levels according to puberty as well as its relation to other reproductive hormones.
Design: Population-based cohort study.
Setting: Not applicable.
Patient(s): Healthy peripubertal girls (n¼10) examined every 6 months; total number of examinations was 84; median (range) per girl:9 (4–10), including staging of pubertal breast development and blood samples.
Intervention(s): None.
Main Outcome Measure(s): Serum levels of INSL3, inhibin B, E2, antim€ullerian hormone, LH, and FSH (validated immunoassays), and T and androstenedione (liquid chromatography–tandem mass spectrometry).
Result(s): Serum levels of INSL3 varied considerably between girls (range, 0.01–0.27 ng/mL) and within each girl as puberty progressed; intraindividual variation, median (range) 102% (65%–143%). Insulin-like peptide 3 increased in late puberty (B1 to B4þB5); geometric mean 0.03 ng/mL to 0.15 ng/mL. Insulin-like peptide 3 levels reflected markers of large follicles (T, androstendione, inhibin B, and E2) better than markers of small follicles (antim€ullerian hormone), and INSL3 staining was localized in theca interna cells of antral follicles.
Conclusion(s): Insulin-like peptide 3 increased in late puberty, albeit inter- and intraindividual variations were substantial. Immunohistochemistry and intraindividual variation, as well as relations to other ovarian hormones, reveal that INSL3 in girls is a unique and specific marker of theca cells surrounding antral follicles. The potential clinical use of INSL3 for evaluation of ovarian function in girls remains to be elucidated.

Journal Article Type Article
Publication Date Mar 1, 2015
Journal Fertility and Sterility
Print ISSN 0015-0282
Electronic ISSN 0015-0282
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 103
Issue 3
APA6 Citation Hagen, C. P., Mieritz, M. G., Nielsen, J. E., Anand-Ivell, R., Ivell, R., & Juul, A. (2015). Longitudinal assessment of circulating insulin-like peptide 3 levels in healthy peripubertal girls. Fertility and Sterility, 103(3), doi:10.1016/j.fertnstert.2014.11.014
DOI https://doi.org/10.1016/j.fertnstert.2014.11.014
Keywords INSL3, puberty, theca, girl, follicle
Publisher URL http://www.sciencedirect.com/science/article/pii/S0015028214023607
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
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