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  • Title: Mouse Mos protooncogene product is present and functions during oogenesis.
    Author: Paules RS, Buccione R, Moschel RC, Vande Woude GF, Eppig JJ.
    Journal: Proc Natl Acad Sci U S A; 1989 Jul; 86(14):5395-9. PubMed ID: 2526337.
    Abstract:
    We have identified the mouse Mos-encoded protein product, p39mos, in maturing mouse oocytes and have shown that it is indistinguishable from the product expressed in Mos-transformed NIH 3T3 cells. p39mos is detected in oocytes arrested in the first meiotic prophase, during germinal-vesicle breakdown, metaphase I, anaphase I, and in ovulated eggs. We show that microinjection of three different Mos antisense (but not sense) oligodeoxyribonucleotides into germinal vesicle-stage oocytes prevents first polar-body emission and therefore interrupted the normal progression of meiosis. These results show that in mouse oocytes, as in the amphibian Xenopus [Sagata, N., Oskarsson, M., Copeland, T., Brumbaugh, J. & Vande Woude, G.F. (1988) Nature (London) 335, 519-525], the product of Mos is necessary for normal meiotic maturation.
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