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Reproductive Biology and Endocrinology
Published in: Reproductive Biology and Endocrinology 1/2019

Open Access 01-12-2019 | Breast Cancer | Research

Letrozole-associated controlled ovarian hyperstimulation in breast cancer patients versus conventional controlled ovarian hyperstimulation in infertile patients: assessment of oocyte quality related biomarkers

Authors: Oranite Goldrat, Geraldine Van Den Steen, Eric Gonzalez-Merino, Julie Dechène, Christine Gervy, Anne Delbaere, Fabienne Devreker, Viviane De Maertelaer, Isabelle Demeestere

Published in: Reproductive Biology and Endocrinology | Issue 1/2019

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Abstract

Background

Fertility preservation (FP) protocols in case of breast cancer (BC) include mature oocyte cryopreservation following letrozole associated controlled ovarian hyperstimulation (Let-COH). To date, the impact of Let-COH on the follicular microenvironment has been poorly investigated, although a high androgen/estrogen ratio was previously associated with low oocyte quality.

Methods

In this prospective study, follicular fluid (FF) steroid levels (estradiol, testosterone, progesterone) and cumulus cell (CC) gene expression related to oocyte quality (HAS2, PTGS2, GREM1) were compared between 23 BC patients undergoing Let-COH for FP and 24 infertile patients undergoing conventional COH without letrozole. All patients underwent an antagonist COH cycle, and ovulation was triggered with hCG or GnRHa in both groups.

Results

FF estradiol levels were significantly lower while testosterone levels were significantly higher in the study group compared to controls irrespective of the trigger method. However, estradiol levels increased significantly with GnRHa triggering compared to hCG in the study group (median = 194.5 (95.4–438) vs 64.4 (43.8–152.4) ng/ml, respectively, p < 0.001), but not in the control group (median = 335.5 (177.5–466.7) vs 354 (179–511) ng/ml, respectively). After hCG trigger, Cumulus cell (CC) gene expression was lower in the study group compared to the control group, and difference was significant for PTGS2. Conversely, CC gene expression of PTGS2 and GREM1 was significantly higher in the study group compared to controls when ovulation was triggered with GnRHa.

Conclusions

Let-COH triggered with hCG may negatively impact oocyte quality. However, ovulation triggering with GnRHa may improve the oocyte microenvironment and cumulus cell genes expression in Let-COH, suggesting a positive impact on oocyte quality in breast cancer patients.

Trial registration

Clinicaltrials.​gov -NCT02661932, registered 25 January 2016, retrospectively registered.
Appendix
Available only for authorised users
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Metadata
Title
Letrozole-associated controlled ovarian hyperstimulation in breast cancer patients versus conventional controlled ovarian hyperstimulation in infertile patients: assessment of oocyte quality related biomarkers
Authors
Oranite Goldrat
Geraldine Van Den Steen
Eric Gonzalez-Merino
Julie Dechène
Christine Gervy
Anne Delbaere
Fabienne Devreker
Viviane De Maertelaer
Isabelle Demeestere
Publication date
01-12-2019
Publisher
BioMed Central
Published in
Reproductive Biology and Endocrinology / Issue 1/2019
Electronic ISSN: 1477-7827
DOI
https://doi.org/10.1186/s12958-018-0443-x

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