1
|
Xu Y, He Z, Song M, Zhou Y, Shen Y. A microRNA switch controls dietary restriction-induced longevity through Wnt signaling. EMBO Rep 2019; 20:embr.201846888. [PMID: 30872315 DOI: 10.15252/embr.201846888] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 01/31/2019] [Accepted: 02/12/2019] [Indexed: 12/29/2022] Open
Abstract
Dietary restriction (DR) is known to have a potent and conserved longevity effect, yet its underlying molecular mechanisms remain elusive. DR modulates signaling pathways in response to nutrient status, a process that also regulates animal development. Here, we show that the suppression of Wnt signaling, a key pathway controlling development, is required for DR-induced longevity in Caenorhabditis elegans We find that DR induces the expression of mir-235, which inhibits cwn-1/WNT4 expression by binding to the 3'-UTR The "switch-on" of mir-235 by DR occurs at the onset of adulthood, thereby minimizing potential disruptions in development. Our results therefore implicate that DR controls the adult lifespan by using a temporal microRNA switch to modulate Wnt signaling.
Collapse
Affiliation(s)
- Yunpeng Xu
- State Key Laboratory of Cell Biology, Innovation Center for Cell Signaling Network, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai, China
| | - Zhidong He
- State Key Laboratory of Cell Biology, Innovation Center for Cell Signaling Network, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai, China
| | - Mengjiao Song
- State Key Laboratory of Cell Biology, Innovation Center for Cell Signaling Network, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai, China
| | - Yifei Zhou
- State Key Laboratory of Cell Biology, Innovation Center for Cell Signaling Network, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai, China
| | - Yidong Shen
- State Key Laboratory of Cell Biology, Innovation Center for Cell Signaling Network, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai, China
| |
Collapse
|
2
|
Wu J, Jiang X, Li Y, Zhu T, Zhang J, Zhang Z, Zhang L, Zhang Y, Wang Y, Zou X, Liang B. PHA-4/FoxA senses nucleolar stress to regulate lipid accumulation in Caenorhabditis elegans. Nat Commun 2018; 9:1195. [PMID: 29567958 PMCID: PMC5864837 DOI: 10.1038/s41467-018-03531-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 02/16/2018] [Indexed: 12/20/2022] Open
Abstract
The primary function of the nucleolus is ribosome biogenesis, which is an extremely energetically expensive process. Failures in ribosome biogenesis cause nucleolar stress with an altered energy status. However, little is known about the underlying mechanism linking nucleolar stress to energy metabolism. Here we show that nucleolar stress is triggered by inactivation of RSKS-1 (ribosomal protein S6 kinase), RRP-8 (ribosomal RNA processing 8), and PRO-2/3 (proximal proliferation), all of which are involved in ribosomal RNA processing or inhibition of rDNA transcription by actinomycin D (AD), leading to excessive lipid accumulation in Caenorhabditis elegans. The transcription factor PHA-4/FoxA acts as a sensor of nucleolar stress to bind to and transactivate the expression of the lipogenic genes pod-2 (acetyl-CoA carboxylase), fasn-1 (fatty acid synthase), and dgat-2 (diacylglycerol O-acyltransferase 2), consequently promoting lipid accumulation. Importantly, inactivation of pha-4 or dgat-2 is sufficient to abolish nucleolar stress-induced lipid accumulation and prolonged starvation survival. The results revealed a distinct PHA-4-mediated lipogenesis pathway that senses nucleolar stress and shifts excessive energy for storage as fat.
Collapse
Affiliation(s)
- Jieyu Wu
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Center for Excellence in Animal Evolution and Genetics, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China
| | - Xue Jiang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Center for Excellence in Animal Evolution and Genetics, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China
| | - Yamei Li
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Center for Excellence in Animal Evolution and Genetics, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
- School of Life Science, University of Science and Technology of China, Hefei, 230027, China
| | - Tingting Zhu
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Center for Excellence in Animal Evolution and Genetics, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China
| | - Jingjing Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Center for Excellence in Animal Evolution and Genetics, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
- Department of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524001, China
| | - Zhiguo Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Center for Excellence in Animal Evolution and Genetics, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China
| | - Linqiang Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Center for Excellence in Animal Evolution and Genetics, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
| | - Yuru Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Center for Excellence in Animal Evolution and Genetics, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
| | - Yanli Wang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Center for Excellence in Animal Evolution and Genetics, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
| | - Xiaoju Zou
- Key Laboratory of Special Biological Resource Development and Utilization of University in Yunnan Province, Department of Life Science and Biotechnology, Kunming University, Kunming, 650214, China.
| | - Bin Liang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Center for Excellence in Animal Evolution and Genetics, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.
- Department of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524001, China.
| |
Collapse
|
3
|
Goszczynski B, Captan VV, Danielson AM, Lancaster BR, McGhee JD. A 44 bp intestine-specific hermaphrodite-specific enhancer from the C. elegans vit-2 vitellogenin gene is directly regulated by ELT-2, MAB-3, FKH-9 and DAF-16 and indirectly regulated by the germline, by daf-2/insulin signaling and by the TGF-β/Sma/Mab pathway. Dev Biol 2016; 413:112-27. [PMID: 26963674 DOI: 10.1016/j.ydbio.2016.02.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 01/29/2016] [Accepted: 02/10/2016] [Indexed: 11/29/2022]
Abstract
The Caenorhabditis elegans vitellogenin genes are transcribed in the intestine of adult hermaphrodites but not of males. A 44-bp region from the vit-2 gene promoter is able largely to reconstitute this tissue-, stage- and sex-specific-expression. This "enhancer" contains a binding site for the DM-domain factor MAB-3, the male-specific repressor of vitellogenesis, as well as an activator site that we show is the direct target of the intestinal GATA factor ELT-2. We further show that the enhancer is directly activated by the winged-helix/forkhead-factor FKH-9, (whose gene has been shown by others to be a direct target of DAF-16), by an unknown activator binding to the MAB-3 site, and by the full C. elegans TGF-β/Sma/Mab pathway acting within the intestine. The vit-2 gene has been shown by others to be repressed by the daf-2/daf-16 insulin signaling pathway, which so strongly influences aging and longevity in C. elegans. We show that the activity of the 44 bp vit-2 enhancer is abolished by loss of daf-2 but is restored by simultaneous loss of daf-16. DAF-2 acts from outside of the intestine but DAF-16 acts both from outside of the intestine and from within the intestine where it binds directly to the same non-canonical target site that interacts with FKH-9. Activity of the 44 bp vit-2 enhancer is also inhibited by loss of the germline, in a manner that is only weakly influenced by DAF-16 but that is strongly influenced by KRI-1, a key downstream effector in the pathway by which germline loss increases C. elegans lifespan. The complex behavior of this enhancer presumably allows vitellogenin gene transcription to adjust to demands of body size, germline proliferation and nutritional state but we suggest that the apparent involvement of this enhancer in aging and longevity "pathways" could be incidental.
Collapse
Affiliation(s)
- Barbara Goszczynski
- Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Vasile V Captan
- Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Alicia M Danielson
- Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Brett R Lancaster
- Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - James D McGhee
- Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
| |
Collapse
|
4
|
Larance M, Pourkarimi E, Wang B, Brenes Murillo A, Kent R, Lamond AI, Gartner A. Global Proteomics Analysis of the Response to Starvation in C. elegans. Mol Cell Proteomics 2015; 14:1989-2001. [PMID: 25963834 PMCID: PMC4587315 DOI: 10.1074/mcp.m114.044289] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Indexed: 12/31/2022] Open
Abstract
Periodic starvation of animals induces large shifts in metabolism but may also influence many other cellular systems and can lead to adaption to prolonged starvation conditions. To date, there is limited understanding of how starvation affects gene expression, particularly at the protein level. Here, we have used mass-spectrometry-based quantitative proteomics to identify global changes in the Caenorhabditis elegans proteome due to acute starvation of young adult animals. Measuring changes in the abundance of over 5,000 proteins, we show that acute starvation rapidly alters the levels of hundreds of proteins, many involved in central metabolic pathways, highlighting key regulatory responses. Surprisingly, we also detect changes in the abundance of chromatin-associated proteins, including specific linker histones, histone variants, and histone posttranslational modifications associated with the epigenetic control of gene expression. To maximize community access to these data, they are presented in an online searchable database, the Encyclopedia of Proteome Dynamics (http://www.peptracker.com/epd/).
Collapse
Affiliation(s)
- Mark Larance
- From the ‡Centre for Gene Regulation and Expression, College of Life Sciences, University of Dundee, Dow St, Dundee, United Kingdom, DD15EH
| | - Ehsan Pourkarimi
- From the ‡Centre for Gene Regulation and Expression, College of Life Sciences, University of Dundee, Dow St, Dundee, United Kingdom, DD15EH
| | - Bin Wang
- From the ‡Centre for Gene Regulation and Expression, College of Life Sciences, University of Dundee, Dow St, Dundee, United Kingdom, DD15EH
| | - Alejandro Brenes Murillo
- From the ‡Centre for Gene Regulation and Expression, College of Life Sciences, University of Dundee, Dow St, Dundee, United Kingdom, DD15EH
| | - Robert Kent
- From the ‡Centre for Gene Regulation and Expression, College of Life Sciences, University of Dundee, Dow St, Dundee, United Kingdom, DD15EH
| | - Angus I Lamond
- From the ‡Centre for Gene Regulation and Expression, College of Life Sciences, University of Dundee, Dow St, Dundee, United Kingdom, DD15EH
| | - Anton Gartner
- From the ‡Centre for Gene Regulation and Expression, College of Life Sciences, University of Dundee, Dow St, Dundee, United Kingdom, DD15EH
| |
Collapse
|
5
|
Pilon M. Developmental genetics of the Caenorhabditis elegans pharynx. WILEY INTERDISCIPLINARY REVIEWS. DEVELOPMENTAL BIOLOGY 2014; 3:263-80. [PMID: 25262818 PMCID: PMC4314705 DOI: 10.1002/wdev.139] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 04/03/2014] [Accepted: 04/15/2014] [Indexed: 11/07/2022]
Abstract
The Caenorhabditis elegans pharynx is a rhythmically pumping organ composed initially of 80 cells that, through fusions, amount to 62 cells in the adult worm. During the first 100 min of development, most future pharyngeal cells are born and gather into a double-plate primordium surrounded by a basal lamina. All pharyngeal cells express the transcription factor PHA-4, of which the concentration increases throughout development, triggering a sequential activation of genes with promoters responding differentially to PHA-4 protein levels. The oblong-shaped pharyngeal primordium becomes polarized, many cells taking on wedge shapes with their narrow ends toward the center, hence forming an epithelial cyst. The primordium then elongates, and reorientations of the cells at the anterior and posterior ends form the mouth and pharyngeal-intestinal openings, respectively. The 20 pharyngeal neurons establish complex but reproducible trajectories using 'fishing line' and growth cone-driven mechanisms, and the gland cells also similarly develop their processes. The genetics behind many fate decisions and morphogenetic processes are being elucidated, and reveal the pharynx to be a fruitful model for developmental biologists.
Collapse
Affiliation(s)
- Marc Pilon
- Department of Chemistry and Molecular Biology, University of GothenburgGothenburg, Sweden
| |
Collapse
|
6
|
Reinke V, Krause M, Okkema P. Transcriptional regulation of gene expression in C. elegans. ACTA ACUST UNITED AC 2013:1-34. [PMID: 23801596 DOI: 10.1895/wormbook.1.45.2] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Protein coding gene sequences are converted to mRNA by the highly regulated process of transcription. The precise temporal and spatial control of transcription for many genes is an essential part of development in metazoans. Thus, understanding the molecular mechanisms underlying transcriptional control is essential to understanding cell fate determination during embryogenesis, post-embryonic development, many environmental interactions, and disease-related processes. Studies of transcriptional regulation in C. elegans exploit its genomic simplicity and physical characteristics to define regulatory events with single-cell and minute-time-scale resolution. When combined with the genetics of the system, C. elegans offers a unique and powerful vantage point from which to study how chromatin-associated proteins and their modifications interact with transcription factors and their binding sites to yield precise control of gene expression through transcriptional regulation.
Collapse
Affiliation(s)
- Valerie Reinke
- Department of Genetics, Yale University, New Haven, CT 06520, USA.
| | | | | |
Collapse
|
7
|
Ghai V, Smit RB, Gaudet J. Transcriptional regulation of HLH-6-independent and subtype-specific genes expressed in the Caenorhabditis elegans pharyngeal glands. Mech Dev 2012; 129:284-97. [PMID: 22759833 DOI: 10.1016/j.mod.2012.06.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Revised: 05/30/2012] [Accepted: 06/22/2012] [Indexed: 01/19/2023]
Abstract
The Caenorhabditis elegans pharyngeal glands represent one of five cell types in the pharynx. We have previously shown that the bHLH transcription factor, HLH-6, is required for gland development and for expression of many, but not all, gland genes (Smit et al., 2008). Here, we have identified additional gland-expressed genes and find that transcriptional regulatory inputs other than HLH-6 are necessary for their regulation. We demonstrate that at least two hlh-6 independent gland genes, nas-12 and Y8A9A.2, require a cis-acting motif (HRL3- Hlh-6 Regulatory eLement 3), previously described based on its requirement for hlh-6 expression (Ghai and Gaudet, 2008). We also show that expression of the gland-expressed genes, ZK596.1, scl-3, wrt-3, and Y76B12C.3, rely on cis-elements and trans-acting factor(s) other than HLH-6 and HRL3. In addition, we show that negative regulatory mechanisms are employed to refine the spatial expression of some genes, resulting in expression in only a subset of the five gland cells. We show that one of these genes, Y8A9A.2, is negatively regulated by the NHR transcription factor encoded by nhr-48, which represses Y8A9A.2 expression in the g1A cells. We also show that another gene expressed in the reciprocal subset of gland cells, phat-5, is negatively regulated in the g1P and g2 cells by an unknown factor acting through a conserved cis-element in the phat-5 promoter. Overall, this work reveals levels of regulation of gene expression in a single cell type beyond that previously known, and suggests mechanisms by which the different gland sub-types are distinguished.
Collapse
Affiliation(s)
- Vikas Ghai
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada.
| | | | | |
Collapse
|
8
|
Maruyama R, Grevengoed E, Stempniewicz P, Andrew DJ. Genome-wide analysis reveals a major role in cell fate maintenance and an unexpected role in endoreduplication for the Drosophila FoxA gene Fork head. PLoS One 2011; 6:e20901. [PMID: 21698206 PMCID: PMC3116861 DOI: 10.1371/journal.pone.0020901] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 05/12/2011] [Indexed: 12/19/2022] Open
Abstract
Transcription factors drive organogenesis, from the initiation of cell fate decisions to the maintenance and implementation of these decisions. The Drosophila embryonic salivary gland provides an excellent platform for unraveling the underlying transcriptional networks of organ development because Drosophila is relatively unencumbered by significant genetic redundancy. The highly conserved FoxA family transcription factors are essential for various aspects of organogenesis in all animals that have been studied. Here, we explore the role of the single Drosophila FoxA protein Fork head (Fkh) in salivary gland organogenesis using two genome-wide strategies. A large-scale in situ hybridization analysis reveals a major role for Fkh in maintaining the salivary gland fate decision and controlling salivary gland physiological activity, in addition to its previously known roles in morphogenesis and survival. The majority of salivary gland genes (59%) are affected by fkh loss, mainly at later stages of salivary gland development. We show that global expression of Fkh cannot drive ectopic salivary gland formation. Thus, unlike the worm FoxA protein PHA-4, Fkh does not function to specify cell fate. In addition, Fkh only indirectly regulates many salivary gland genes, which is also distinct from the role of PHA-4 in organogenesis. Our microarray analyses reveal unexpected roles for Fkh in blocking terminal differentiation and in endoreduplication in the salivary gland and in other Fkh-expressing embryonic tissues. Overall, this study demonstrates an important role for Fkh in determining how an organ preserves its identity throughout development and provides an alternative paradigm for how FoxA proteins function in organogenesis.
Collapse
Affiliation(s)
- Rika Maruyama
- Department of Cell Biology, The Johns Hopkins University, School of Medicine, Baltimore, Maryland, United States of America
| | - Elizabeth Grevengoed
- Department of Cell Biology, The Johns Hopkins University, School of Medicine, Baltimore, Maryland, United States of America
| | - Peter Stempniewicz
- Department of Cell Biology, The Johns Hopkins University, School of Medicine, Baltimore, Maryland, United States of America
| | - Deborah J. Andrew
- Department of Cell Biology, The Johns Hopkins University, School of Medicine, Baltimore, Maryland, United States of America
- * E-mail:
| |
Collapse
|