Abstract
Purpose
To understand the mechanism of premature ovarian failure (POF).
Methods
The ultrastructural (electron microscopy) analysis of primordial ovarian follicles in Nobox deficient mice.
Results
We studied, for the first time, the fate of oogonia in embryonic (prenatal) mouse ovaries and showed that the abolishment of the transition from germ cell cysts to primordial follicles in the ovaries of Nobox deficient mice is caused by defects in germ cell cyst breakdown, leading to the formation of syncytial follicles instead of primordial follicles.
Conclusions
These results indicate that POF syndrome in Nobox deficient mice results from the faulty signaling between somatic and germ line components during embryonic development. In addition, the extremely unusual and abnormal presence of adherens junctions between unseparated oocytes within syncytial follicles indicates that faulty communication between somatic and germ cells is involved in, or leads to, abnormalities in the cell adhesion program.
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Acknowledgements
We thank Elzbieta Kisiel for preparing the figures, Ada Jankowska for technical help and Prof. Elzbieta Pyza for providing electron microscopy facilities. This study was supported by the National Institutes of Health Grants HD44858, HD058125, and the 413 March of Dimes grant #6-FY08-313 to AR.
Author contribution
Agnieszka Lechowska processed EM samples and analyzed and interpreted data, Szczepan Bilinski analyzed and interpreted EM data, Youngsok Choi maintained mouse colonies and helped with interpretation of EM, Yonghyun Shin performed immunohistochemistry with Tex14 and interpreted the data, Malgorzata Kloc wrote the manuscript, analyzed data, coordinated study Aleksandar Rajkovic, conception, design and data analysis.
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Capsule Premature ovarian failure (POF) syndrome in Nobox deficient mice results from the faulty signaling between somatic and germ line components during embryonic development.
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Lechowska, A., Bilinski, S., Choi, Y. et al. Premature ovarian failure in nobox-deficient mice is caused by defects in somatic cell invasion and germ cell cyst breakdown. J Assist Reprod Genet 28, 583–589 (2011). https://doi.org/10.1007/s10815-011-9553-5
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DOI: https://doi.org/10.1007/s10815-011-9553-5