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Huang S, Cox RL, Tuckowski A, Beydoun S, Bhat A, Howington MB, Sarker M, Miller H, Ruwe E, Wang E, Li X, Gardea EA, DeNicola D, Peterson W, Carrier JM, Miller RA, Sutphin GL, Leiser SF. Fmo induction as a tool to screen for pro-longevity drugs. GeroScience 2024; 46:4689-4706. [PMID: 38787463 PMCID: PMC11335711 DOI: 10.1007/s11357-024-01207-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Accepted: 05/15/2024] [Indexed: 05/25/2024] Open
Abstract
Dietary restriction (DR) and hypoxia (low oxygen) extend lifespan in Caenorhabditis elegans through the induction of a convergent downstream longevity gene, fmo-2. Flavin-containing monooxygenases (FMOs) are highly conserved xenobiotic-metabolizing enzymes with a clear role in promoting longevity in nematodes and a plausible similar role in mammals. This makes them an attractive potential target of small molecule drugs to stimulate the health-promoting effects of longevity pathways. Here, we utilize an fmo-2 fluorescent transcriptional reporter in C. elegans to screen a set of 80 compounds previously shown to improve stress resistance in mouse fibroblasts. Our data show that 19 compounds significantly induce fmo-2, and 10 of the compounds induce fmo-2 more than twofold. Interestingly, 9 of the 10 high fmo-2 inducers also extend lifespan in C. elegans. Two of these drugs, mitochondrial respiration chain complex inhibitors, interact with the hypoxia pathway to induce fmo-2, whereas two dopamine receptor type 2 (DRD2) antagonists interact with the DR pathway to induce fmo-2, indicating that dopamine signaling is involved in DR-mediated fmo-2 induction. Together, our data identify nine drugs that each (1) increase stress resistance in mouse fibroblasts, (2) induce fmo-2 in C. elegans, and (3) extend nematode lifespan, some through known longevity pathways. These results define fmo-2 induction as a viable approach to identifying and understanding mechanisms of putative longevity compounds.
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Affiliation(s)
- Shijiao Huang
- Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA.
| | - Rebecca L Cox
- Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Angela Tuckowski
- Cell and Molecular Biology Program, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Safa Beydoun
- Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Ajay Bhat
- Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Marshall B Howington
- Cell and Molecular Biology Program, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Marjana Sarker
- Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Hillary Miller
- Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Ethan Ruwe
- Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Emily Wang
- Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Xinna Li
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI, 316048109-2200, USA
| | - Emily A Gardea
- Department of Molecular & Cellular Biology, University of Arizona, Tucson, AZ, 85721, USA
| | - Destiny DeNicola
- Department of Molecular & Cellular Biology, University of Arizona, Tucson, AZ, 85721, USA
| | - William Peterson
- Department of Molecular & Cellular Biology, University of Arizona, Tucson, AZ, 85721, USA
| | - Jeffrey M Carrier
- Department of Molecular & Cellular Biology, University of Arizona, Tucson, AZ, 85721, USA
| | - Richard A Miller
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI, 316048109-2200, USA
- University of Michigan Geriatrics Center, Ann Arbor, MI, 48109, USA
| | - George L Sutphin
- Department of Molecular & Cellular Biology, University of Arizona, Tucson, AZ, 85721, USA
| | - Scott F Leiser
- Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA.
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA.
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Feng D, Qu L, Powell-Coffman JA. Transcriptome analyses describe the consequences of persistent HIF-1 over-activation in Caenorhabditis elegans. PLoS One 2024; 19:e0295093. [PMID: 38517909 PMCID: PMC10959373 DOI: 10.1371/journal.pone.0295093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 02/20/2024] [Indexed: 03/24/2024] Open
Abstract
Metazoan animals rely on oxygen for survival, but during normal development and homeostasis, animals are often challenged by hypoxia (low oxygen). In metazoans, many of the critical hypoxia responses are mediated by the evolutionarily conserved hypoxia-inducible transcription factors (HIFs). The stability and activity of HIF complexes are strictly regulated. In the model organism C. elegans, HIF-1 stability and activity are negatively regulated by VHL-1, EGL-9, RHY-1 and SWAN-1. Importantly, C. elegans mutants carrying strong loss-of-function mutations in these genes are viable, and this provides opportunities to interrogate the molecular consequences of persistent HIF-1 over-activation. We find that the genome-wide gene expression patterns are compellingly similar in these mutants, supporting models in which RHY-1, VHL-1 and EGL-9 function in common pathway(s) to regulate HIF-1 activity. These studies illuminate the diversified biological roles played by HIF-1, including metabolism and stress response. Genes regulated by persistent HIF-1 over-activation overlap with genes responsive to pathogens, and they overlap with genes regulated by DAF-16. As crucial stress regulators, HIF-1 and DAF-16 converge on key stress-responsive genes and function synergistically to enable hypoxia survival.
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Affiliation(s)
- Dingxia Feng
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa, United States of America
| | - Long Qu
- Department of Statistics, Iowa State University, Ames, Iowa, United States of America
| | - Jo Anne Powell-Coffman
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa, United States of America
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Feng D, Qu L. Transcriptome analyses describe the consequences of persistent HIF-1 over-activation in Caenorhabditis elegans. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.15.567311. [PMID: 38014086 PMCID: PMC10680707 DOI: 10.1101/2023.11.15.567311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Metazoan animals rely on oxygen for survival, but during normal development and homeostasis, animals are often challenged by hypoxia (low oxygen). In metazoans, many of the critical hypoxia responses are mediated by the evolutionarily conserved hypoxia-inducible transcription factors (HIFs). The stability and activity of HIF complexes are strictly regulated. In the model organism C. elegans, HIF-1 stability and activity are negatively regulated by VHL-1, EGL-9, RHY-1 and SWAN-1. Importantly, C. elegans mutants carrying strong loss-of-function mutations in these genes are viable, and this provides opportunities to interrogate the molecular consequences of persistent HIF-1 over-activation. We find that the genome-wide gene expression patterns are compellingly similar in these mutants, supporting models in which RHY-1, SWAN-1 and EGL-9 function in common pathway(s) to regulate HIF-1 activity. These studies illuminate the diversified biological roles played by HIF-1, including metabolism, hypoxia and other stress responses, reproduction and development. Genes regulated by persistent HIF-1 over-activation overlap with genes responsive to pathogens, and they overlap with genes regulated by DAF-16. As crucial stress regulators, HIF-1 and DAF-16 converge on key stress-responsive genes and function synergistically to enable hypoxia survival.
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Affiliation(s)
- Dingxia Feng
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa, United States of America
| | - Long Qu
- Department of Statistics, Iowa State University, Ames, Iowa, United States of America
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