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Ren Q, Nie X, Ma X, Han Z, Li Y, Yang X, Ji L, Su R, Ge J, Huang X. The crosstalk between Toll and AMPK signaling pathways mediates growth inhibition of Eriocheir sinensis under deltamethrin stress. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2024; 267:106832. [PMID: 38215609 DOI: 10.1016/j.aquatox.2024.106832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 12/09/2023] [Accepted: 01/07/2024] [Indexed: 01/14/2024]
Abstract
Hepatopancreatic necrosis disease (HPND) broke out in 2015 in the Eriocheir sinensis aquaculture region of Xinghua, Jiangsu Province; however, the specific cause of HPND remains unclear. A correlation was found between HPND outbreak and the use of deltamethrin by farmers. In this study, E. sinensis specimens developed the clinical symptoms of HPND after 93 days of deltamethrin stress. The growth of E. sinensis with HPND was inhibited. Adenosine monophosphate-activated protein kinase (AMPK) is a central regulator of energy homeostasis, and its expression was up-regulated in the intestine of E. sinensis with HPND. Growth inhibitory genes (EsCabut, Es4E-BP, and EsCG6770) were also up-regulated in the intestine of E. sinensis with HPND. The expression levels of EsCabut, Es4E-BP, and EsCG6770 decreased after EsAMPK knockdown. Therefore, AMPK mediated the growth inhibition of E. sinensis with HPND. Further analysis indicated the presence of a crosstalk between the Toll and AMPK signaling pathways in E. sinensis with HPND. Multiple genes in the Toll signaling pathway were upregulated in E. sinensis under 93 days of deltamethrin stress. EsAMPK and its regulated growth inhibition genes were down-regulated after the knockdown of genes in the Toll pathway. In summary, the crosstalk between the Toll and AMPK signaling pathways mediates the growth inhibition of E. sinensis under deltamethrin stress.
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Affiliation(s)
- Qian Ren
- School of Marine Sciences, Nanjing University of information Science & Technology, Nanjing, Jiangsu Province, 210044, PR China.
| | - Ximei Nie
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Xingkong Ma
- Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing, PR China
| | - Zhengxiao Han
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Yanfang Li
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Xintong Yang
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Lei Ji
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Rongqian Su
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China
| | - Jiachun Ge
- Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing, PR China.
| | - Xin Huang
- Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, PR China.
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Kulkarni A, Pandey A, Trainor P, Carlisle S, Yu W, Kukutla P, Xu J. Aryl hydrocarbon receptor and Krüppel like factor 10 mediate a transcriptional axis modulating immune homeostasis in mosquitoes. Sci Rep 2022; 12:6005. [PMID: 35397616 PMCID: PMC8994780 DOI: 10.1038/s41598-022-09817-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 03/21/2022] [Indexed: 11/25/2022] Open
Abstract
Immune responses require delicate controls to maintain homeostasis while executing effective defense. Aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor. The Krüppel-like factor 10 (KLF10) is a C2H2 zinc-finger containing transcription factor. The functions of mosquito AhR and KLF10 have not been characterized. Here we show that AhR and KLF10 constitute a transcriptional axis to modulate immune responses in mosquito Anopheles gambiae. The manipulation of AhR activities via agonists or antagonists repressed or enhanced the mosquito antibacterial immunity, respectively. KLF10 was recognized as one of the AhR target genes in the context. Phenotypically, silencing KLF10 reversed the immune suppression caused by the AhR agonist. The transcriptome comparison revealed that silencing AhR and KLF10 plus challenge altered the expression of 2245 genes in the same way. The results suggest that KLF10 is downstream of AhR in a transcriptional network responsible for immunomodulation. This AhR–KLF10 axis regulates a set of genes involved in metabolism and circadian rhythms in the context. The axis was required to suppress the adverse effect caused by the overactivation of the immune pathway IMD via the inhibitor gene Caspar silencing without a bacterial challenge. These results demonstrate that the AhR–KLF10 axis mediates an immunoregulatory transcriptional network as a negative loop to maintain immune homeostasis.
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Affiliation(s)
- Aditi Kulkarni
- Biology Department, New Mexico State University, Las Cruces, NM, 88003, USA
| | - Ashmita Pandey
- Biology Department, New Mexico State University, Las Cruces, NM, 88003, USA
| | - Patrick Trainor
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM, 88003, USA
| | - Samantha Carlisle
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM, 88003, USA
| | - Wanqin Yu
- Biology Department, New Mexico State University, Las Cruces, NM, 88003, USA
| | - Phanidhar Kukutla
- Biology Department, New Mexico State University, Las Cruces, NM, 88003, USA
| | - Jiannong Xu
- Biology Department, New Mexico State University, Las Cruces, NM, 88003, USA.
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Zhang P, Katzaroff AJ, Buttitta LA, Ma Y, Jiang H, Nickerson DW, Øvrebø JI, Edgar BA. The Krüppel-like factor Cabut has cell cycle regulatory properties similar to E2F1. Proc Natl Acad Sci U S A 2021; 118:e2015675118. [PMID: 33558234 PMCID: PMC7896318 DOI: 10.1073/pnas.2015675118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Using a gain-of-function screen in Drosophila, we identified the Krüppel-like factor Cabut (Cbt) as a positive regulator of cell cycle gene expression and cell proliferation. Enforced cbt expression is sufficient to induce an extra cell division in the differentiating fly wing or eye, and also promotes intestinal stem cell divisions in the adult gut. Although inappropriate cell proliferation also results from forced expression of the E2f1 transcription factor or its target, Cyclin E, Cbt does not increase E2F1 or Cyclin E activity. Instead, Cbt regulates a large set of E2F1 target genes independently of E2F1, and our data suggest that Cbt acts via distinct binding sites in target gene promoters. Although Cbt was not required for cell proliferation during wing or eye development, Cbt is required for normal intestinal stem cell divisions in the midgut, which expresses E2F1 at relatively low levels. The E2F1-like functions of Cbt identify a distinct mechanism for cell cycle regulation that may be important in certain normal cell cycles, or in cells that cycle inappropriately, such as cancer cells.
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Affiliation(s)
- Peng Zhang
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112
- Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112
| | - Alexia J Katzaroff
- Molecular and Cellular Biology Program, University of Washington, Seattle, WA 98195
- Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Laura A Buttitta
- Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Yiqin Ma
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112
- Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112
| | - Huaqi Jiang
- Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Derek W Nickerson
- Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Jan Inge Øvrebø
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112
- Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112
| | - Bruce A Edgar
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112;
- Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112
- Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
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Agrawal P, Chung P, Heberlein U, Kent C. Enabling cell-type-specific behavioral epigenetics in Drosophila: a modified high-yield INTACT method reveals the impact of social environment on the epigenetic landscape in dopaminergic neurons. BMC Biol 2019; 17:30. [PMID: 30967153 PMCID: PMC6456965 DOI: 10.1186/s12915-019-0646-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 03/07/2019] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Epigenetic mechanisms play fundamental roles in brain function and behavior and stressors such as social isolation can alter animal behavior via epigenetic mechanisms. However, due to cellular heterogeneity, identifying cell-type-specific epigenetic changes in the brain is challenging. Here, we report the first use of a modified isolation of nuclei tagged in specific cell type (INTACT) method in behavioral epigenetics of Drosophila melanogaster, a method we call mini-INTACT. RESULTS Using ChIP-seq on mini-INTACT purified dopaminergic nuclei, we identified epigenetic signatures in socially isolated and socially enriched Drosophila males. Social experience altered the epigenetic landscape in clusters of genes involved in transcription and neural function. Some of these alterations could be predicted by expression changes of four transcription factors and the prevalence of their binding sites in several clusters. These transcription factors were previously identified as activity-regulated genes, and their knockdown in dopaminergic neurons reduced the effects of social experience on sleep. CONCLUSIONS Our work enables the use of Drosophila as a model for cell-type-specific behavioral epigenetics and establishes that social environment shifts the epigenetic landscape in dopaminergic neurons. Four activity-related transcription factors are required in dopaminergic neurons for the effects of social environment on sleep.
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Affiliation(s)
- Pavan Agrawal
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA.
| | - Phuong Chung
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
| | - Ulrike Heberlein
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
| | - Clement Kent
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA.
- Department of Biology, York University, Toronto, Canada.
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Muñoz-Soriano V, Belacortu Y, Sanz FJ, Solana-Manrique C, Dillon L, Suay-Corredera C, Ruiz-Romero M, Corominas M, Paricio N. Cbt modulates Foxo activation by positively regulating insulin signaling in Drosophila embryos. BIOCHIMICA ET BIOPHYSICA ACTA. GENE REGULATORY MECHANISMS 2018; 1861:S1874-9399(18)30034-8. [PMID: 30055320 DOI: 10.1016/j.bbagrm.2018.07.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 07/10/2018] [Accepted: 07/19/2018] [Indexed: 01/05/2023]
Abstract
In late Drosophila embryos, the epidermis exhibits a dorsal hole as a consequence of germ band retraction. It is sealed during dorsal closure (DC), a morphogenetic process in which the two lateral epidermal layers converge towards the dorsal midline and fuse. We previously demonstrated the involvement of the Cbt transcription factor in Drosophila DC. However its molecular role in the process remained obscure. In this study, we used genomic approaches to identify genes regulated by Cbt as well as its direct targets during late embryogenesis. Our results reveal a complex transcriptional circuit downstream of Cbt and evidence that it is functionally related with the Insulin/insulin-like growth factor signaling pathway. In this context, Cbt may act as a positive regulator of the pathway, leading to the repression of Foxo activity. Our results also suggest that the DC defects observed in cbt embryos could be partially due to Foxo overactivation and that a regulatory feedback loop between Foxo and Cbt may be operating in the DC context.
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Affiliation(s)
- Verónica Muñoz-Soriano
- Departamento de Genética, Facultad CC Biológicas, Universitat de València, 46100 Burjasot, Spain; Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universitat de València, Dr Moliner 50, 46100 Burjassot, Spain
| | - Yaiza Belacortu
- Departamento de Genética, Facultad CC Biológicas, Universitat de València, 46100 Burjasot, Spain
| | - Francisco José Sanz
- Departamento de Genética, Facultad CC Biológicas, Universitat de València, 46100 Burjasot, Spain; Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universitat de València, Dr Moliner 50, 46100 Burjassot, Spain
| | - Cristina Solana-Manrique
- Departamento de Genética, Facultad CC Biológicas, Universitat de València, 46100 Burjasot, Spain; Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universitat de València, Dr Moliner 50, 46100 Burjassot, Spain
| | - Luke Dillon
- Departamento de Genética, Facultad CC Biológicas, Universitat de València, 46100 Burjasot, Spain
| | - Carmen Suay-Corredera
- Departamento de Genética, Facultad CC Biológicas, Universitat de València, 46100 Burjasot, Spain
| | - Marina Ruiz-Romero
- Departament de Genètica, Facultat de Biologia, and Institut de Biomedicina (IBUB) de la Universitat de Barcelona, Barcelona, Spain
| | - Montserrat Corominas
- Departament de Genètica, Facultat de Biologia, and Institut de Biomedicina (IBUB) de la Universitat de Barcelona, Barcelona, Spain
| | - Nuria Paricio
- Departamento de Genética, Facultad CC Biológicas, Universitat de València, 46100 Burjasot, Spain; Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universitat de València, Dr Moliner 50, 46100 Burjassot, Spain.
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6
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Muñoz-Soriano V, Domingo-Muelas A, Li T, Gamero E, Bizy A, Fariñas I, Alepuz P, Paricio N. Evolutionary conserved role of eukaryotic translation factor eIF5A in the regulation of actin-nucleating formins. Sci Rep 2017; 7:9580. [PMID: 28852021 PMCID: PMC5575014 DOI: 10.1038/s41598-017-10057-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 08/02/2017] [Indexed: 01/26/2023] Open
Abstract
Elongation factor eIF5A is required for the translation of consecutive prolines, and was shown in yeast to translate polyproline-containing Bni1, an actin-nucleating formin required for polarized growth during mating. Here we show that Drosophila eIF5A can functionally replace yeast eIF5A and is required for actin-rich cable assembly during embryonic dorsal closure (DC). Furthermore, Diaphanous, the formin involved in actin dynamics during DC, is regulated by and mediates eIF5A effects. Finally, eIF5A controls cell migration and regulates Diaphanous levels also in mammalian cells. Our results uncover an evolutionary conserved role of eIF5A regulating cytoskeleton-dependent processes through translation of formins in eukaryotes.
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Affiliation(s)
- Verónica Muñoz-Soriano
- Departamento de Genética, Universidad de Valencia, 46100, Burjassot, Spain
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100, Burjassot, Spain
| | - Ana Domingo-Muelas
- Departamento de Biología Celular & Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Universidad de Valencia, 46100, Burjassot, Spain
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100, Burjassot, Spain
| | - Tianlu Li
- Departamento de Bioquímica y Biología Molecular, Universidad de Valencia, 46100, Burjassot, Spain
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100, Burjassot, Spain
- Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), 08908, Hospitalet de Llobregat, Spain
| | - Esther Gamero
- Departamento de Bioquímica y Biología Molecular, Universidad de Valencia, 46100, Burjassot, Spain
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100, Burjassot, Spain
| | - Alexandra Bizy
- Departamento de Biología Celular & Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Universidad de Valencia, 46100, Burjassot, Spain
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100, Burjassot, Spain
| | - Isabel Fariñas
- Departamento de Biología Celular & Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Universidad de Valencia, 46100, Burjassot, Spain
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100, Burjassot, Spain
| | - Paula Alepuz
- Departamento de Bioquímica y Biología Molecular, Universidad de Valencia, 46100, Burjassot, Spain.
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100, Burjassot, Spain.
| | - Nuria Paricio
- Departamento de Genética, Universidad de Valencia, 46100, Burjassot, Spain.
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100, Burjassot, Spain.
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Nazario-Yepiz NO, Riesgo-Escovar JR. piragua encodes a zinc finger protein required for development in Drosophila. Mech Dev 2016; 144:171-181. [PMID: 28011160 DOI: 10.1016/j.mod.2016.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 11/07/2016] [Accepted: 12/19/2016] [Indexed: 02/06/2023]
Abstract
We isolated and characterized embryonic lethal mutations in piragua (prg). The prg locus encodes a protein with an amino terminus Zinc Finger-Associated-Domain (ZAD) and nine C2H2 zinc fingers (ZF). prg mRNA and protein expression during embryogenesis is dynamic with widespread maternal contribution, and subsequent expression in epithelial precursors. About a quarter of prg mutant embryos do not develop cuticle, and from those that do a small fraction have cuticular defects. Roughly half of prg mutants die during embryogenesis. prg mutants have an extended phenocritical period encompassing embryogenesis and first instar larval stage, since the other half of prg mutants die as first or second instar larvae. During dorsal closure, time-lapse high-resolution imaging shows defects arising out of sluggishness in closure, resolving at times in failures of closure. prg is expressed in imaginal discs, and is required for imaginal development. prg was identified in imaginal tissue in a cell super competition screen, together with other genes, like flower. We find that flower mutations are also embryonic lethal with a similar phenocritical period and strong embryonic mutant phenotypes (head involution defects, primarily). The two loci interact genetically in the embryo, as they increase embryonic mortality to close to 90% with the same embryonic phenotypes (dorsal closure and head involution defects, plus lack of cuticle). Mutant prg clones generated in developing dorsal thorax and eye imaginal tissue have strong developmental defects (lack of bristles and ommatidial malformations). prg is required in several developmental morphogenetic processes.
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Affiliation(s)
- Nestor O Nazario-Yepiz
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, UNAM, Campus UNAM Juriquilla, Boulevard Juriquilla 3001, Querétaro, Querétaro c.p. 76230, Mexico
| | - Juan R Riesgo-Escovar
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, UNAM, Campus UNAM Juriquilla, Boulevard Juriquilla 3001, Querétaro, Querétaro c.p. 76230, Mexico.
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Mathison A, Escande C, Calvo E, Seo S, White T, Salmonson A, Faubion WA, Buttar N, Iovanna J, Lomberk G, Chini EN, Urrutia R. Phenotypic Characterization of Mice Carrying Homozygous Deletion of KLF11, a Gene in Which Mutations Cause Human Neonatal and MODY VII Diabetes. Endocrinology 2015; 156:3581-95. [PMID: 26248217 PMCID: PMC4588811 DOI: 10.1210/en.2015-1145] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We have previously shown that amino acid changes in the human Kruppel-Like Factor (KLF) 11 protein is associated with the development of maturity onset diabetes of the young VII, whereas complete inactivation of this pathway by the -331 human insulin mutation causes neonatal diabetes mellitus. Here, we report that Klf11-/- mice have decreased circulating insulin levels, alterations in the control of blood glucose and body weight, as well as serum dyslipidemia, but do not develop diabetes. Functional assays using ex vivo liver tissue sections demonstrate that Klf11-/- mice display increased insulin sensitivity. Genome-wide experiments validated by pathway-specific quantitative PCR arrays reveal that the Klf11-/- phenotype associates to alterations in the regulation of gene networks involved in lipid metabolism, in particular those regulated by peroxisome proliferator-activated receptor-γ. Combined, these results demonstrate that the major phenotype given by the whole-body deletion of Klf11 in mouse is not diabetes but increased insulin sensitivity, likely due to altered transcriptional regulation in target tissues. The absence of diabetes in the Klf11-/- mouse either indicates an interspecies difference for the role of this transcription factor in metabolic homeostasis between mouse and humans, or potentially highlights the fact that other molecular factors can compensate for its absence. Nevertheless, the data of this study, gathered at the whole-organism level, further support a role for KLF11 in metabolic processes like insulin sensitivity, which regulation is critical in several forms of diabetes.
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Affiliation(s)
- Angela Mathison
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Carlos Escande
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Ezequiel Calvo
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Seungmae Seo
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Thomas White
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Ann Salmonson
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - William A Faubion
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Navtej Buttar
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Juan Iovanna
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Gwen Lomberk
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Eduardo N Chini
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Raul Urrutia
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
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9
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Ruiz-Romero M, Blanco E, Paricio N, Serras F, Corominas M. Cabut/dTIEG associates with the transcription factor Yorkie for growth control. EMBO Rep 2015; 16:362-9. [PMID: 25572844 PMCID: PMC4364875 DOI: 10.15252/embr.201439193] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The Drosophila transcription factor Cabut/dTIEG (Cbt) is a growth regulator, whose expression is modulated by different stimuli. Here, we determine Cbt association with chromatin and identify Yorkie (Yki), the transcriptional co-activator of the Hippo (Hpo) pathway as its partner. Cbt and Yki co-localize on common gene promoters, and the expression of target genes varies according to changes in Cbt levels. Down-regulation of Cbt suppresses the overgrowth phenotypes caused by mutations in expanded (ex) and yki overexpression, whereas its up-regulation promotes cell proliferation. Our results imply that Cbt is a novel partner of Yki that is required as a transcriptional co-activator in growth control.
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Affiliation(s)
- Marina Ruiz-Romero
- Departament de Genètica, Facultat de Biologia and Institut de Biomedicina (IBUB) de la Universitat de Barcelona, Barcelona, Spain
| | - Enrique Blanco
- Departament de Genètica, Facultat de Biologia and Institut de Biomedicina (IBUB) de la Universitat de Barcelona, Barcelona, Spain Centre for Genomic Regulation (CRG), Barcelona, Spain
| | - Nuria Paricio
- Departamento de Genética, Facultad de Ciencias Biológicas, Universidad de Valencia, Valencia, Spain
| | - Florenci Serras
- Departament de Genètica, Facultat de Biologia and Institut de Biomedicina (IBUB) de la Universitat de Barcelona, Barcelona, Spain
| | - Montserrat Corominas
- Departament de Genètica, Facultat de Biologia and Institut de Biomedicina (IBUB) de la Universitat de Barcelona, Barcelona, Spain
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10
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Song M, Zhang Y, Katzaroff AJ, Edgar BA, Buttitta L. Hunting complex differential gene interaction patterns across molecular contexts. Nucleic Acids Res 2014; 42:e57. [PMID: 24482443 PMCID: PMC3985659 DOI: 10.1093/nar/gku086] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Heterogeneity in genetic networks across different signaling molecular contexts can suggest molecular regulatory mechanisms. Here we describe a comparative chi-square analysis (CPχ2) method, considerably more flexible and effective than other alternatives, to screen large gene expression data sets for conserved and differential interactions. CPχ2 decomposes interactions across conditions to assess homogeneity and heterogeneity. Theoretically, we prove an asymptotic chi-square null distribution for the interaction heterogeneity statistic. Empirically, on synthetic yeast cell cycle data, CPχ2 achieved much higher statistical power in detecting differential networks than alternative approaches. We applied CPχ2 to Drosophila melanogaster wing gene expression arrays collected under normal conditions, and conditions with overexpressed E2F and Cabut, two transcription factor complexes that promote ectopic cell cycling. The resulting differential networks suggest a mechanism by which E2F and Cabut regulate distinct gene interactions, while still sharing a small core network. Thus, CPχ2 is sensitive in detecting network rewiring, useful in comparing related biological systems.
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Affiliation(s)
- Mingzhou Song
- Department of Computer Science, New Mexico State University, Las Cruces, NM 88003, USA, Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA, Molecular and Cellular Biology Graduate Program, University of Washington, Seattle, WA 98195, USA and German Cancer Research Center (DKFZ)-Center for Molecular Biology Heidelberg (ZMBH) Alliance, Im Neuenheimer Feld 282, D-69120 Heidelberg, Germany
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11
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Lomberk G, Grzenda A, Mathison A, Escande C, Zhang JS, Calvo E, Miller LJ, Iovanna J, Chini EN, Fernandez-Zapico ME, Urrutia R. Krüppel-like factor 11 regulates the expression of metabolic genes via an evolutionarily conserved protein interaction domain functionally disrupted in maturity onset diabetes of the young. J Biol Chem 2013; 288:17745-58. [PMID: 23589285 PMCID: PMC3682574 DOI: 10.1074/jbc.m112.434670] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The function of Krüppel-like factor 11 (KLF11) in the regulation of metabolic pathways is conserved from flies to human. Alterations in KLF11 function result in maturity onset diabetes of the young 7 (MODY7) and neonatal diabetes; however, the mechanisms underlying the role of this protein in metabolic disorders remain unclear. Here, we investigated how the A347S genetic variant, present in MODY7 patients, modulates KLF11 transcriptional activity. A347S affects a previously identified transcriptional regulatory domain 3 (TRD3) for which co-regulators remain unknown. Structure-oriented sequence analyses described here predicted that the KLF11 TRD3 represents an evolutionarily conserved protein domain. Combined yeast two-hybrid and protein array experiments demonstrated that the TRD3 binds WD40, WWI, WWII, and SH3 domain-containing proteins. Using one of these proteins as a model, guanine nucleotide-binding protein β2 (Gβ2), we investigated the functional consequences of KLF11 coupling to a TRD3 binding partner. Combined immunoprecipitation and biomolecular fluorescence complementation assays confirmed that activation of three different metabolic G protein-coupled receptors (β-adrenergic, secretin, and cholecystokinin) induces translocation of Gβ2 to the nucleus where it directly binds KLF11 in a manner that is disrupted by the MODY7 A347S variant. Using genome-wide expression profiles, we identified metabolic gene networks impacted upon TRD3 disruption. Furthermore, A347S disrupted KLF11-mediated increases in basal insulin levels and promoter activity and blunted glucose-stimulated insulin secretion. Thus, this study characterizes a novel protein/protein interaction domain disrupted in a KLF gene variant that associates to MODY7, contributing to our understanding of gene regulation events in complex metabolic diseases.
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Affiliation(s)
- Gwen Lomberk
- Laboratory of Epigenetics and Chromatin Dynamics, Epigenomics Translational Program, Mayo Clinic Center for Individualized Medicine, Division of Gastroenterology and Hepatology, and Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905, USA
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12
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Belacortu Y, Weiss R, Kadener S, Paricio N. Transcriptional activity and nuclear localization of Cabut, the Drosophila ortholog of vertebrate TGF-β-inducible early-response gene (TIEG) proteins. PLoS One 2012; 7:e32004. [PMID: 22359651 PMCID: PMC3281117 DOI: 10.1371/journal.pone.0032004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Accepted: 01/17/2012] [Indexed: 01/26/2023] Open
Abstract
Background Cabut (Cbt) is a C2H2-class zinc finger transcription factor involved in embryonic dorsal closure, epithelial regeneration and other developmental processes in Drosophila melanogaster. Cbt orthologs have been identified in other Drosophila species and insects as well as in vertebrates. Indeed, Cbt is the Drosophila ortholog of the group of vertebrate proteins encoded by the TGF-ß-inducible early-response genes (TIEGs), which belong to Sp1-like/Krüppel-like family of transcription factors. Several functional domains involved in transcriptional control and subcellular localization have been identified in the vertebrate TIEGs. However, little is known of whether these domains and functions are also conserved in the Cbt protein. Methodology/Principal Findings To determine the transcriptional regulatory activity of the Drosophila Cbt protein, we performed Gal4-based luciferase assays in S2 cells and showed that Cbt is a transcriptional repressor and able to regulate its own expression. Truncated forms of Cbt were then generated to identify its functional domains. This analysis revealed a sequence similar to the mSin3A-interacting repressor domain found in vertebrate TIEGs, although located in a different part of the Cbt protein. Using β-Galactosidase and eGFP fusion proteins, we also showed that Cbt contains the bipartite nuclear localization signal (NLS) previously identified in TIEG proteins, although it is non-functional in insect cells. Instead, a monopartite NLS, located at the amino terminus of the protein and conserved across insects, is functional in Drosophila S2 and Spodoptera exigua Sec301 cells. Last but not least, genetic interaction and immunohistochemical assays suggested that Cbt nuclear import is mediated by Importin-α2. Conclusions/Significance Our results constitute the first characterization of the molecular mechanisms of Cbt-mediated transcriptional control as well as of Cbt nuclear import, and demonstrate the existence of similarities and differences in both aspects of Cbt function between the insect and the vertebrate TIEG proteins.
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Affiliation(s)
- Yaiza Belacortu
- Departamento de Genética, Facultad CC Biológicas, Universidad de Valencia, Burjasot, Spain
| | - Ron Weiss
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat-Ram, Jerusalem, Israel
| | - Sebastian Kadener
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat-Ram, Jerusalem, Israel
| | - Nuria Paricio
- Departamento de Genética, Facultad CC Biológicas, Universidad de Valencia, Burjasot, Spain
- * E-mail:
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13
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Drosophila TIEG is a modulator of different signalling pathways involved in wing patterning and cell proliferation. PLoS One 2011; 6:e18418. [PMID: 21494610 PMCID: PMC3072976 DOI: 10.1371/journal.pone.0018418] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 03/07/2011] [Indexed: 11/19/2022] Open
Abstract
Acquisition of a final shape and size during organ development requires a
regulated program of growth and patterning controlled by a complex genetic
network of signalling molecules that must be coordinated to provide positional
information to each cell within the corresponding organ or tissue. The mechanism
by which all these signals are coordinated to yield a final response is not well
understood. Here, I have characterized the Drosophila ortholog
of the human TGF-β Inducible Early Gene 1 (dTIEG). TIEG are zinc-finger
proteins that belong to the Krüppel-like factor (KLF) family and were
initially identified in human osteoblasts and pancreatic tumor cells for the
ability to enhance TGF-β response. Using the developing wing of
Drosophila as “in vivo” model, the dTIEG
function has been studied in the control of cell proliferation and patterning.
These results show that dTIEG can modulate Dpp signalling. Furthermore, dTIEG
also regulates the activity of JAK/STAT pathway suggesting a conserved role of
TIEG proteins as positive regulators of TGF-β signalling and as mediators of
the crosstalk between signalling pathways acting in a same cellular context.
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14
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Belacortu Y, Weiss R, Kadener S, Paricio N. Expression of Drosophila Cabut during early embryogenesis, dorsal closure and nervous system development. Gene Expr Patterns 2010; 11:190-201. [PMID: 21109026 DOI: 10.1016/j.gep.2010.11.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Revised: 11/05/2010] [Accepted: 11/18/2010] [Indexed: 01/21/2023]
Abstract
cabut (cbt) encodes a transcription factor involved in Drosophila dorsal closure (DC), and it is expressed in embryonic epithelial sheets and yolk cell during this process upon activation of the Jun N-terminal kinase (JNK) signaling pathway. Additional studies suggest that cbt may have a role in multiple developmental processes. To analyze Cbt localization through embryogenesis, we generated a Cbt specific antibody that has allowed detecting new Cbt expression patterns. Immunohistochemical analyses on syncytial embryos and S2 cells reveal that Cbt is localized on the surface of mitotic chromosomes at all mitotic phases. During DC, Cbt is expressed in the yolk cell, in epidermal cells and in the hindgut, but also in amnioserosal cells, which also contribute to the process, albeit cbt transcripts were not detected in that tissue. At later embryonic stages, Cbt is expressed in neurons and glial cells in the central nervous system, and is detected in axons of the central and peripheral nervous systems. Most of these expression patterns are recapitulated by GFP reporter gene constructs driven by different cbt genomic regions. Moreover, they have been further validated by immunostainings of embryos from other Drosophila species, thus suggesting that Cbt function during embryogenesis appears to be conserved in evolution.
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Affiliation(s)
- Yaiza Belacortu
- Departamento de Genética, Facultad CC Biológicas, Universidad de Valencia, 46100 Burjasot, Spain
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15
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Blanco E, Ruiz-Romero M, Beltran S, Bosch M, Punset A, Serras F, Corominas M. Gene expression following induction of regeneration in Drosophila wing imaginal discs. Expression profile of regenerating wing discs. BMC DEVELOPMENTAL BIOLOGY 2010; 10:94. [PMID: 20813047 PMCID: PMC2939566 DOI: 10.1186/1471-213x-10-94] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Accepted: 09/02/2010] [Indexed: 12/15/2022]
Abstract
BACKGROUND Regeneration is the ability of an organism to rebuild a body part that has been damaged or amputated, and can be studied at the molecular level using model organisms. Drosophila imaginal discs, which are the larval primordia of adult cuticular structures, are capable of undergoing regenerative growth after transplantation and in vivo culture into the adult abdomen. RESULTS Using expression profile analyses, we studied the regenerative behaviour of wing discs at 0, 24 and 72 hours after fragmentation and implantation into adult females. Based on expression level, we generated a catalogue of genes with putative role in wing disc regeneration, identifying four classes: 1) genes with differential expression within the first 24 hours; 2) genes with differential expression between 24 and 72 hours; 3) genes that changed significantly in expression levels between the two time periods; 4) genes with a sustained increase or decrease in their expression levels throughout regeneration. Among these genes, we identified members of the JNK and Notch signalling pathways and chromatin regulators. Through computational analysis, we recognized putative binding sites for transcription factors downstream of these pathways that are conserved in multiple Drosophilids, indicating a potential relationship between members of the different gene classes. Experimental data from genetic mutants provide evidence of a requirement of selected genes in wing disc regeneration. CONCLUSIONS We have been able to distinguish various classes of genes involved in early and late steps of the regeneration process. Our data suggests the integration of signalling pathways in the promoters of regulated genes.
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Affiliation(s)
- Enrique Blanco
- Departament de Genètica, and Institut de Biomedicina de la Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Catalonia, Spain
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