developing a culture system for preantral follicles has important biotechnological implications due to the potential to produce a large number of oocytes for embryo production and transfer. to accomplish this goal, the present study was aimed to culture preantral follicles in the presence of different media, sera and fsh concentrations. six-week-old preantral follicles (95 ± 5 µm) were cultured...

JMY is a transcriptional co-factor of p53. Latest work has revealed that JMY is also an actin nucleation factor that regulates new filament assembly and activates Arp2/3 complex in somatic cells; however, roles of JMY in mouse oocyte are unknown. Here we showed the expression and functions of JMY during mouse oocyte meiotic maturation. JMY mRNA is expressed largely from germinal vesicle to meta...

Panoramic and conventional electron microscopic examinations were conducted on the mouse gastric mucosa with special reference to the distribution of immature forms of chief and parietal cells. Immature chief cells were occasionally present as high as the transitional region between the isthmus and neck of the gland, although their main localization was at the uppermost part of the base. Immatu...

Sexual reproduction is essential for many organisms to propagate themselves. It requires the formation of haploid female and male gametes: oocytes and sperms. These specialized cells are generated through meiosis, a particular type of cell division that produces cells with recombined genomes that differ from their parental origin. In this review, we highlight the end process of female meiosis, ...

Interface Maturation on the Contractile Behavior Robert Gauvin, Danielle Larouche, Rina Guignard, Hugo Marcoux, François Auger, Lucie Germain. 1 LOEX, Hôpital du Saint-Sacrement, Centre Hospitalier Affilié Universitaire de Québec (CHA), Québec, QC., Canada. 2 Department of Surgery, Université Laval, Québec, QC., Canada. Currently at the Harvard-MIT Division of Health Sciences and Technology (HS...

The postembryonic growth of the compound eye of the cockroach Periplaneta americana involves increases in the size of the individual ommatidia as well as a 35-fold increase in the number of ommatidia. These ommatidia are added to the anterior, dorsal, and ventral margins of the eye by means of an almost continuous process of cell division in the proliferation zone in these margins. This prolife...

In plants, the preprophase band (PPB) of microtubules marks the cortical site where the cross-wall will fuse with the parental wall during cytokinesis . This band disappears before metaphase, and it is not known how the division plane is "memorized". One idea is that the PPB leaves behind molecules involved in the maturation of the cell plate . Here, we report on the proteomic isolation of a no...

This study was conducted to examine follicle growth and intra-ovarian oocyte release in rabbit ovaries influenced by a local application of prostaglandin formation inhibitors. While five rabbits remained as unstimulated controls, twenty-seven mature rabbits were hyperstimulated by pure follicle stimulating hormone (FSH) followed by human chorionic gonadotropin (hCG) at time 0. At the same time,...

In mammals, each cone had been thought to contain only one single type of photopigment. It was not until the early 1990s that photopigment coexpression was reported. In the house mouse, the distribution of color cones shows a characteristic division. Whereas in the upper retinal field the ratio of short wave to middle-to-long wave cones falls in the usual range (1:10), in the ventral retinal fi...

The edible mushroom Volvariella volvacea is an important crop in Southeast Asia and is predominantly harvested in the egg stage. One of the main factors that negatively affect its yield and value is the rapid transition from the egg to the elongation stage, which has a decreased commodity value and shelf life. To improve our understanding of the changes during stipe development and the transiti...