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A Burrowing/Tunneling Assay for Detection of Hypoxia in Drosophila melanogaster Larvae
Published on: March 27, 2018
Experimental selection for Drosophila survival in extremely low O(2) environment
Dan Zhou1, Jin Xue, Jianming Chen
1Department of Pediatrics, Section of Respiratory Medicine, and Neuroscience, University of California San Diego, La Jolla, California, United States of America.
Plos One
|May 31, 2007
Summary
Researchers developed a Drosophila melanogaster strain that thrives in low oxygen conditions, identifying key genes like Best1 and dunce that enhance hypoxia tolerance. This discovery offers insights into survival mechanisms relevant to both insects and mammals.
Area of Science:
- Genetics
- Molecular Biology
- Physiology
Background:
- Cellular hypoxia can lead to injury or death.
- Research focuses on molecular mechanisms of hypoxic injury and tolerance.
- Investigating the genetic basis for adaptation to long-term low oxygen environments.
Purpose of the Study:
- Determine the genetic basis for adaptation to long-term low oxygen conditions.
- Identify genes conferring hypoxia tolerance.
- Explore potential therapeutic targets for hypoxia-related conditions.
Main Methods:
- Long-term experimental selection of Drosophila melanogaster over generations.
- Phenotypic analysis of selected strains under extremely low oxygen.
- Gene expression profiling using arrays.
- Functional validation of candidate genes via P-element insertions.
Main Results:
- Developed a Drosophila strain with perpetual survival at 4% oxygen.
- Observed phenotypic divergence: faster recovery from anoxia, higher oxygen consumption, reduced body size.
- Identified altered expression in ~4% of the Drosophila genome, with significant down-regulation.
- Down-regulation of Best1, broad, CG7102, dunce, lin19-like, and sec6 conferred significant hypoxia tolerance.
Conclusions:
- Identified key genes crucial for survival in extreme hypoxia in Drosophila.
- Hypoxia tolerance genes are conserved, suggesting relevance to mammalian physiology and pathology.
- Findings provide a foundation for understanding and potentially treating hypoxia-related diseases.
