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In Vivo Forward Genetic Screen to Identify Novel Neuroprotective Genes in Drosophila melanogaster
Published on: July 11, 2019
Genome-wide P-element screen for Drosophila synaptogenesis mutants
Faith L W Liebl1, Kristen M Werner, Qi Sheng
1Department of Biological Sciences, University of Illinois at Chicago, Chicago, Illinois 60607, USA.
Journal of Neurobiology
|January 13, 2006
Summary
This study screened Drosophila mutants to understand brain wiring, finding that synaptogenesis requires many genes and highlighting potential issues with transposon mutagenesis methods.
Area of Science:
- Neuroscience
- Developmental Biology
- Genetics
Background:
- Understanding brain wiring (synaptogenesis) is crucial for developmental and experiential rewiring.
- Genomic and molecular advances enable large-scale studies of synaptogenesis.
Purpose of the Study:
- To identify genes involved in the formation and development of the Drosophila neuromuscular junction (NMJ).
- To analyze synaptogenesis on a genomic scale using a P-element transposon screen.
Main Methods:
- Screened 2185 P-element transposon mutants in Drosophila.
- Identified homozygous lethal mutants and examined embryonic/larval NMJs using immunocytochemistry and confocal microscopy.
- Performed complementation tests and RT-PCR assays.
Main Results:
- Identified 88 mutants with altered NMJ morphology from 202 lethal mutants screened.
- Mutants affected genes encoding diverse proteins, including cytoskeletal regulators, cell adhesion molecules, and kinases.
- Found 13% of insertions in genes with novel or unknown functions and ~51% of lines had background mutations.
Conclusions:
- Synaptogenesis involves a vast number of genes, potentially up to 44% of the genome.
- Transposon mutagenesis requires careful interpretation due to potential background mutations.
