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Combined Nucleotide and Protein Extractions in Caenorhabditis elegans
Published on: March 17, 2019
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Transcriptome analyses describe the consequences of persistent HIF-1 over-activation in Caenorhabditis elegans
1Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa, United States of America.
Biorxiv : the Preprint Server for Biology
|November 28, 2023
Summary
Hypoxia-inducible factors (HIFs) regulate critical responses to low oxygen. In C. elegans, disrupting negative regulators of HIF-1 reveals its diverse roles in stress, metabolism, and development, highlighting synergistic interactions with DAF-16 for survival.
Area of Science:
- Molecular Biology
- Genetics
- Developmental Biology
Background:
- Metazoans require oxygen, but often face hypoxia, with hypoxia-inducible factors (HIFs) mediating critical responses.
- HIF stability and activity are tightly regulated, with VHL-1, EGL-9, RHY-1, and SWAN-1 negatively regulating HIF-1 in *C. elegans*.
Approach:
- Studied viable *C. elegans* mutants with loss-of-function mutations in HIF-1 negative regulators.
- Analyzed genome-wide gene expression patterns to understand consequences of persistent HIF-1 over-activation.
- Investigated overlap in gene regulation between HIF-1, pathogen responses, and DAF-16.
Key Points:
- Genome-wide gene expression patterns were similar across mutants, suggesting RHY-1, SWAN-1, and EGL-9 act in common pathways to control HIF-1.
- Persistent HIF-1 over-activation impacts diverse biological roles, including metabolism, stress responses, reproduction, and development.
- Genes regulated by HIF-1 over-activation overlap with pathogen-responsive genes and those regulated by DAF-16.
Conclusions:
- HIF-1 plays multifaceted roles beyond hypoxia response, influencing broader physiological processes.
- HIF-1 and DAF-16 act synergistically on key stress-responsive genes, enhancing survival under hypoxic conditions.
- Understanding HIF-1 regulation provides insights into metazoan adaptation to environmental challenges.
