WebJan 1, 2005 · The cytoplasmic asters became undetectable within 2 h of oocyte activation, irrespective of the presence or absence of the donor chromosomes. After the standard NT protocol, a spindle-like ... WebUnlike the oocytes of most other animal species, unfertilized murine oocytes contain cytoplasmic asters, which act as microtubule-organizing centers following fertilization. This study examined the role of asters during the first cell cycle of mouse nuclear transfer (NT) embryos. NT was performed by intracytoplasmic injection of cumulus cells. Cytoplasmic …
Cortical cytasters: a highly conserved developmental trait of Bilateri…
WebFeb 16, 1999 · Thus, the sperm centrosome must have recruited γ-tubulin from the maternal cytoplasm and gained the ability to nucleate Mts and form asters after entry into the oocyte. Surprisingly, 20 min after fertilization, during metaphase of meiosis I, neither sperm asters nor γ-tubulin staining was found associated with sperm nuclei (Fig. 1 C ). WebMar 15, 2012 · In the next experiment, multiple asters observed in 5.5 vs 8 hpi pronuclear zygotes were located near the male pronucleus, suggesting that those multiple asters were not the cytoplasmic asters of maternal origin. In conclusion, multiple aster formation frequently observed in vitrified-warmed bovine oocytes may be related to loss of … cylinder records value
MEK1/2 is a critical regulator of microtubule assembly and
WebJan 1, 2005 · Cytoplasmic asters were localized by staining with an anti-alpha-tubulin antibody. Enucleation of MII oocytes caused no significant change in the number of … WebSep 1, 1998 · These unique results not only provide a demonstration that cytoplasmic dynein is required for the formation of mitotic asters in N. haematococca; they also represent the first report of mitotic phenotypes in a dynein mutant of any filamentous fungus and the first cytoplasmic dynein mutant of any organism whose mitotic phenotypes … WebThe cytoplasmic foci were larger and more abundant than in untreated oocytes (Table 1). Double staining revealed that the anti-γ- tubulin reactivity was found in the center of all the asters... cylinder recordings