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Expression of Rbp9 during mid-oogenesis induces apoptosis in egg chambers

Kyoungsuk Jeong1, Jeongsil Kim-Ha

  • 1Department of Molecular Biology, School of Natural Sciences, Sejong University, Seoul 143-747, Korea.

Molecules and Cells
|January 28, 2004
PubMed

Insights

Over-expressing the Drosophila RNA binding protein RBP9 causes developmental defects, including apoptosis in egg chambers. Tight control of RBP9 transcription is critical for proper Drosophila development.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • The Drosophila RNA binding protein RBP9 (Rbp9) is expressed in ovarian germline and neuronal cells, specifically in postmitotic cells.
  • Rbp9 is hypothesized to regulate genes involved in cell proliferation and differentiation.

Purpose of the Study:

  • To investigate the effects of ectopic RBP9 expression in Drosophila germline and somatic cells.
  • To understand the role of RBP9 in developmental processes.

Main Methods:

  • Utilized the Gal4 system for ectopic gene expression in Drosophila.
  • Examined developmental defects resulting from RBP9 over-expression in various tissues, particularly during mid-oogenesis.

Main Results:

  • Ectopic RBP9 expression led to severe developmental abnormalities across different tissues.
  • Over-expression during mid-oogenesis induced apoptosis in stage 10 egg chambers, a phenotype similar to Dcp-1 caspase over-expression.
  • The observed phenotype suggests a critical role for RBP9 in regulating cell death pathways during oogenesis.

Conclusions:

  • Tight transcriptional control of RBP9 is essential for normal Drosophila development.
  • RBP9 may function in pathways that prevent inappropriate apoptosis during oogenesis.

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