Wnt4/5a signalling coordinates cell adhesion and entry into meiosis during presumptive ovarian follicle development
العنوان: | Wnt4/5a signalling coordinates cell adhesion and entry into meiosis during presumptive ovarian follicle development |
---|---|
المؤلفون: | Ilkka Pietilä, Jingdong Shan, Renata Prunskaite-Hyyryläinen, Seppo Vainio, Raija Sormunen, Tiina Jokela, Florence Naillat |
المصدر: | Human Molecular Genetics. 19:1539-1550 |
بيانات النشر: | Oxford University Press (OUP), 2010. |
سنة النشر: | 2010 |
مصطلحات موضوعية: | Somatic cell, Biology, Wnt-5a Protein, Germline, Mice, Cytochrome P-450 Enzyme System, Ovarian Follicle, Meiosis, Wnt4 Protein, WNT4, Cell Adhesion, Genetics, medicine, Animals, Molecular Biology, Genetics (clinical), Mice, Knockout, Wnt signaling pathway, Gene Expression Regulation, Developmental, Cell Differentiation, General Medicine, Retinoic Acid 4-Hydroxylase, Embryonic stem cell, Cell biology, Wnt Proteins, medicine.anatomical_structure, Female, Germ line development, Germ cell, Signal Transduction |
الوصف: | Germ cells are the foundation of an individual, since they generate the gametes and provide the unique genome established through meiosis. The sex-specific fate of the germline in mammals is thought to be controlled by somatic signals, which are still poorly characterized. We demonstrate here that somatic Wnt signalling is crucial for the control of female germline development. Wnt-4 maintains germ cell cysts and early follicular gene expression and provides a female pattern of E-cadherin and beta-catenin expression within the germ cells. In addition, we find that Stra8 expression is downregulated and the Cyp26b1 gene is expressed ectopically in the partially masculinized Wnt-4-deficient ovary. Wnt-4 may control meiosis via these proteins since the Cyp26b1 enzyme is known to degrade retinoic acid (RA) and inhibit meiosis in the male embryo, and Stra8 induces meiosis in the female through RA. Reintroduction of a Wnt-4 signal to the partially masculinized embryonic ovary, in fact, rescues the female property to a certain degree, as seen by inhibition of Cyp26b1 and induction of Irx3 gene expression. Wnt-4 deficiency allows only 20% of the germ cells to initiate meiosis in the ovary, whereas meiosis is inhibited completely in the Wnt-4/Wnt-5a double mutant. These findings indicate a critical role for Wnt signalling in meiosis. Thus, the Wnt signals are important somatic cell signals that coordinate presumptive female follicle development. |
تدمد: | 1460-2083 0964-6906 |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00874a8074e48ece5f40125ceefe2146 https://doi.org/10.1093/hmg/ddq027 |
حقوق: | OPEN |
رقم الأكسشن: | edsair.doi.dedup.....00874a8074e48ece5f40125ceefe2146 |
قاعدة البيانات: | OpenAIRE |
تدمد: | 14602083 09646906 |
---|