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Oocytes of baboon fetal primordial ovarian follicles express estrogen receptor beta mRNA.
Endocrine. 2008 Jun; 33(3):254-60.E

Abstract

In fetal ovaries of estrogen-suppressed baboons, we have previously shown that follicle numbers were 50% lower than in estrogen-replete animals and contained oocytes with a reduced number of microvilli. In the baboon fetal ovary, although estrogen receptor (ER)alpha and beta have been detected by immunocytochemistry in granulosa cells, it is not known whether oocytes express ER. Because the actions of estrogen are mediated by interaction with cell-specific receptors, the current study determined whether ERalpha/beta mRNA were expressed in oocytes of baboon fetal ovaries obtained on day 165 (term = day 184) of gestation. Oocyte nuclei and cytoplasm from primordial follicles were isolated by laser capture microdissection and ERalpha, ERbeta, GATA-4 (granulosa cell specific marker) mRNAs, and 18S rRNA determined by RT-PCR and products verified by sequencing. ERbeta mRNA was expressed in oocytes of 5 of 5 fetuses. In contrast, fetal oocytes did not express ERalpha mRNA. Although 18S rRNA was expressed in all oocytes, GATA-4 mRNA was not detected in oocytes and only detected in granulosa cells confirming purity of oocytes sampled. We conclude that oocytes of the fetal baboon ovary express ERbeta mRNA, thereby providing a mechanism by which estrogen regulates oocyte function, e.g. microvillus development.

Authors+Show Affiliations

Department of Obstetrics,, The Jones Institute for Reproductive Medicine, Eastern Virginia Medical School, Norfolk, VA 23501, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

18484193

Citation

Bocca, Silvina M., et al. "Oocytes of Baboon Fetal Primordial Ovarian Follicles Express Estrogen Receptor Beta MRNA." Endocrine, vol. 33, no. 3, 2008, pp. 254-60.
Bocca SM, Billiar RB, Albrecht ED, et al. Oocytes of baboon fetal primordial ovarian follicles express estrogen receptor beta mRNA. Endocrine. 2008;33(3):254-60.
Bocca, S. M., Billiar, R. B., Albrecht, E. D., & Pepe, G. J. (2008). Oocytes of baboon fetal primordial ovarian follicles express estrogen receptor beta mRNA. Endocrine, 33(3), 254-60. https://doi.org/10.1007/s12020-008-9081-y
Bocca SM, et al. Oocytes of Baboon Fetal Primordial Ovarian Follicles Express Estrogen Receptor Beta MRNA. Endocrine. 2008;33(3):254-60. PubMed PMID: 18484193.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oocytes of baboon fetal primordial ovarian follicles express estrogen receptor beta mRNA. AU - Bocca,Silvina M, AU - Billiar,Reinhart B, AU - Albrecht,Eugene D, AU - Pepe,Gerald J, PY - 2008/01/25/received PY - 2008/05/06/accepted PY - 2008/05/05/revised PY - 2008/5/20/pubmed PY - 2009/6/20/medline PY - 2008/5/20/entrez SP - 254 EP - 60 JF - Endocrine JO - Endocrine VL - 33 IS - 3 N2 - In fetal ovaries of estrogen-suppressed baboons, we have previously shown that follicle numbers were 50% lower than in estrogen-replete animals and contained oocytes with a reduced number of microvilli. In the baboon fetal ovary, although estrogen receptor (ER)alpha and beta have been detected by immunocytochemistry in granulosa cells, it is not known whether oocytes express ER. Because the actions of estrogen are mediated by interaction with cell-specific receptors, the current study determined whether ERalpha/beta mRNA were expressed in oocytes of baboon fetal ovaries obtained on day 165 (term = day 184) of gestation. Oocyte nuclei and cytoplasm from primordial follicles were isolated by laser capture microdissection and ERalpha, ERbeta, GATA-4 (granulosa cell specific marker) mRNAs, and 18S rRNA determined by RT-PCR and products verified by sequencing. ERbeta mRNA was expressed in oocytes of 5 of 5 fetuses. In contrast, fetal oocytes did not express ERalpha mRNA. Although 18S rRNA was expressed in all oocytes, GATA-4 mRNA was not detected in oocytes and only detected in granulosa cells confirming purity of oocytes sampled. We conclude that oocytes of the fetal baboon ovary express ERbeta mRNA, thereby providing a mechanism by which estrogen regulates oocyte function, e.g. microvillus development. SN - 1355-008X UR - https://www.unboundmedicine.com/medline/citation/18484193/Oocytes_of_baboon_fetal_primordial_ovarian_follicles_express_estrogen_receptor_beta_mRNA_ L2 - https://dx.doi.org/10.1007/s12020-008-9081-y DB - PRIME DP - Unbound Medicine ER -