Stage-specific regulation of caspase activity in drosophila oogenesis
نویسندگان
چکیده
منابع مشابه
Stage-specific regulation of programmed cell death during oogenesis of the medfly Ceratitis capitata (Diptera, Tephritidae).
In the present study, we describe novel features of programmed cell death in developing egg chambers occurring during mid- and late-oogenesis of the medfly Ceratitis capitata. During mid-oogenesis, the spontaneously degenerated egg chambers exhibit typical characteristics of apoptotic cell death. Their nurse cells contain fragmented DNA and fragmented actin, as revealed by TUNEL assay and immun...
متن کاملTranslational regulation of a specific gene during oogenesis and embryogenesis of Drosophila.
Polysomal and postpolysomal mRNAs were prepared from Drosophila egg chambers or embryos of different developmental stages. Cell-free translation of these mRNAs followed by two-dimensional gel electrophoresis of the products indicated the presence of a specific mRNA that appears to be translated (polysome-associated) during oogenesis. This mRNA, designated T1 mRNA, is selectively excluded from p...
متن کاملDrosophila oogenesis
cytoplasmic tail and prevents their internalization and degradation. Similarly to β-catenin, unbound p120ctn can translocate to the nucleus where it binds Kaiso, a zinc finger transcription factor that acts as a transcriptional repressor. Once bound to Kaiso, p120ctn relieves the repressor activity of Kaiso by dissociating it from its sequence-specific binding sites. As with β-catenin, Wnt sign...
متن کاملRegulation of the vitellogenin receptor during Drosophila melanogaster oogenesis.
In many insects, development of the oocyte arrests temporarily just before vitellogenesis, the period when vitellogenins (yolk proteins) accumulate in the oocyte. Following hormonal and environmental cues, development of the oocyte resumes, and endocytosis of vitellogenins begins. An essential component of yolk uptake is the vitellogenin receptor. In this report, we describe the ovarian express...
متن کاملOrganizer activity of the polar cells during Drosophila oogenesis.
Patterning of the Drosophila egg requires the establishment of several distinct types of somatic follicle cells, as well as interactions between these follicle cells and the oocyte. The polar cells occupy the termini of the follicle and are specified by the activation of Notch. We have investigated their role in follicle patterning by creating clones of cells mutant for the Notch modulator frin...
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ژورنال
عنوان ژورنال: Developmental Biology
سال: 2003
ISSN: 0012-1606
DOI: 10.1016/s0012-1606(03)00240-9