1
|
Gonzalez DA, Jia T, Pinzón JH, Acevedo SF, Ojelade SA, Xu B, Tay N, Desrivières S, Hernandez JL, Banaschewski T, Büchel C, Bokde AL, Conrod PJ, Flor H, Frouin V, Gallinat J, Garavan H, Gowland PA, Heinz A, Ittermann B, Lathrop M, Martinot JL, Paus T, Smolka MN, Rodan AR, Schumann G, Rothenfluh A. The Arf6 activator Efa6/PSD3 confers regional specificity and modulates ethanol consumption in Drosophila and humans. Mol Psychiatry 2018; 23:621-628. [PMID: 28607459 PMCID: PMC5729071 DOI: 10.1038/mp.2017.112] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 03/21/2017] [Accepted: 04/11/2017] [Indexed: 12/19/2022]
Abstract
Ubiquitously expressed genes have been implicated in a variety of specific behaviors, including responses to ethanol. However, the mechanisms that confer this behavioral specificity have remained elusive. Previously, we showed that the ubiquitously expressed small GTPase Arf6 is required for normal ethanol-induced sedation in adult Drosophila. Here, we show that this behavioral response also requires Efa6, one of (at least) three Drosophila Arf6 guanine exchange factors. Ethanol-naive Arf6 and Efa6 mutants were sensitive to ethanol-induced sedation and lacked rapid tolerance upon re-exposure to ethanol, when compared with wild-type flies. In contrast to wild-type flies, both Arf6 and Efa6 mutants preferred alcohol-containing food without prior ethanol experience. An analysis of the human ortholog of Arf6 and orthologs of Efa6 (PSD1-4) revealed that the minor G allele of single nucleotide polymorphism (SNP) rs13265422 in PSD3, as well as a haplotype containing rs13265422, was associated with an increased frequency of drinking and binge drinking episodes in adolescents. The same haplotype was also associated with increased alcohol dependence in an independent European cohort. Unlike the ubiquitously expressed human Arf6 GTPase, PSD3 localization is restricted to the brain, particularly the prefrontal cortex (PFC). Functional magnetic resonance imaging revealed that the same PSD3 haplotype was also associated with a differential functional magnetic resonance imaging signal in the PFC during a Go/No-Go task, which engages PFC-mediated executive control. Our translational analysis, therefore, suggests that PSD3 confers regional specificity to ubiquitous Arf6 in the PFC to modulate human alcohol-drinking behaviors.
Collapse
Affiliation(s)
- Dante A. Gonzalez
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX,Program in Neuroscience, University of Texas Southwestern Medical Center, Dallas, TX
| | - Tianye Jia
- Institute of Psychiatry, King’s College London, United Kingdom,MRC Social, Genetic and Developmental Psychiatry (SGDP) Centre, London, United Kingdom
| | - Jorge H. Pinzón
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX
| | - Summer F. Acevedo
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX
| | - Shamsideen A. Ojelade
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX,Program in Neuroscience, University of Texas Southwestern Medical Center, Dallas, TX
| | - Bing Xu
- Institute of Psychiatry, King’s College London, United Kingdom,MRC Social, Genetic and Developmental Psychiatry (SGDP) Centre, London, United Kingdom
| | - Nicole Tay
- Institute of Psychiatry, King’s College London, United Kingdom,MRC Social, Genetic and Developmental Psychiatry (SGDP) Centre, London, United Kingdom
| | - Sylvane Desrivières
- Institute of Psychiatry, King’s College London, United Kingdom,MRC Social, Genetic and Developmental Psychiatry (SGDP) Centre, London, United Kingdom
| | - Jeannie L. Hernandez
- Department of Psychiatry, Molecular Medicine Program, University of Utah, Salt Lake City
| | - Tobias Banaschewski
- Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Germany
| | | | - Arun L.W. Bokde
- Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland
| | - Patricia J. Conrod
- MRC Social, Genetic and Developmental Psychiatry (SGDP) Centre, London, United Kingdom,Department of Psychiatry, Université de Montreal, CHU Ste Justine Hospital, Canada
| | - Herta Flor
- Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Germany
| | - Vincent Frouin
- Neurospin, Commissariat à l’Energie Atomique, Gif-sur-Yvette, France
| | - Jürgen Gallinat
- Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Charité – Universitätsmedizin Berlin, Germany
| | - Hugh Garavan
- Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland,Departments of Psychiatry and Psychology, University of Vermont, Burlington, USA
| | - Penny A. Gowland
- Physikalisch-Technische Bundesanstalt (PTB), Braunschweig und Berlin, Germany
| | - Andreas Heinz
- Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Charité – Universitätsmedizin Berlin, Germany
| | - Bernd Ittermann
- Physikalisch-Technische Bundesanstalt (PTB), Braunschweig und Berlin, Germany
| | - Mark Lathrop
- McGill University and Genome Quebec Innovation Centre, Ontario, Canada
| | - Jean-Luc Martinot
- Institut National de la Santé et de la Recherche Médicale, INSERM CEA Unit 1000 “Imaging & Psychiatry”, University Paris Sud, Orsay, and AP-HP Department of Adolescent Psychopathology and Medicine, Maison de Solenn, University Paris Descartes, Paris, France
| | - Tomás Paus
- School of Psychology, University of Nottingham, United Kingdom,Rotman Research Institute, University of Toronto, Toronto, Canada,Montreal Neurological Institute, McGill University, Canada
| | - Michael N. Smolka
- Department of Psychiatry and Psychotherapy, Technische Universität Dresden, Germany,Neuroimaging Center, Department of Psychology, Technische Universität Dresden, Germany
| | | | - Aylin R. Rodan
- Department of Internal Medicine, Division of Nephrology, University of Texas Southwestern Medical Center, Dallas, TX,Department of Internal Medicine, Division of Nephrology, Molecular Medicine Program, University of Utah, Salt Lake City
| | - Gunter Schumann
- Institute of Psychiatry, King’s College London, United Kingdom,MRC Social, Genetic and Developmental Psychiatry (SGDP) Centre, London, United Kingdom
| | - Adrian Rothenfluh
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX,Program in Neuroscience, University of Texas Southwestern Medical Center, Dallas, TX,Department of Psychiatry, Molecular Medicine Program, University of Utah, Salt Lake City
| |
Collapse
|
2
|
Zhu X, Zhou T, Chen L, Zheng S, Chen S, Zhang D, Li G, Wang Z. Arf6 controls endocytosis and polarity during asexual development of Magnaporthe oryzae. FEMS Microbiol Lett 2016; 363:fnw248. [PMID: 27810885 DOI: 10.1093/femsle/fnw248] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 03/27/2016] [Accepted: 10/28/2016] [Indexed: 01/03/2023] Open
Abstract
Asexual development of phytopathogenic fungi such as Magnaporthe oryzae involves morphological changes that require spatiotemporal regulation of polarized growth. ADP-ribosylation factor 6 (Arf6) is a small GTPase known to regulate membrane trafficking and organization of the actin cytoskeleton at the cell surface, and consequently has an impact on cell morphology and polarity. In this study, we have functionally characterized the Arf6 homolog in M. oryzae, showing that ▵arf6 exhibits hyperbranching at hyphal tips and morphologically abnormal conidia as a result of defective polarized growth. ▵arf6 hyphae are also defective in endocytosis as evidenced by a significant delay of FM4-64 uptake. Most ▵arf6 conidia display reduced conidial length, and have defects in conidial septum formation and nuclear distribution. Furthermore, ▵arf6 conidia show a disorganized actin cytoskeleton with random distribution of actin patches at the cell cortex and reduced accumulation of tropomyosin. Arf6-GFP is found to concentrate at the septum area and possibly in endocytic vesicles. Taken together, our data indicate that Arf6 plays an essential role in endocytosis and polarity establishment during asexual development of M. oryzae.
Collapse
Affiliation(s)
- Xiaohan Zhu
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.,Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Tengsheng Zhou
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China .,Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Liqiong Chen
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.,Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Shiqin Zheng
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Shaohua Chen
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Dongmei Zhang
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China .,Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Guangpu Li
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Zonghua Wang
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.,Key Laboratory for Functional Genomics of Plant Fungal Pathogens, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| |
Collapse
|
3
|
Li M, Wang J, Ng SSM, Chan CY, He ML, Yu F, Lai L, Shi C, Chen Y, Yew DT, Kung HF, Lin MCM. Adenosine diphosphate-ribosylation factor 6 is required for epidermal growth factor-induced glioblastoma cell proliferation. Cancer 2009; 115:4959-72. [PMID: 19642173 DOI: 10.1002/cncr.24550] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND : Epidermal growth factor (EGF) signaling plays a pivotal role in gliomagenesis. The authors previously demonstrated that adenosine diphospate-ribosylation factor 6 (ARF6), a member of the Ras-related small guanosine-5'-triphospate-binding protein family, is required for EFA6A-induced glioma cell migration and invasion. However, the role of ARF6 in EGF signaling is unknown. METHODS : The authors analyzed messenger RNA (mRNA) levels of ARF6 and EGF receptor (EGFR) in 16 high-grade glioma samples and in 6 low-grade glioma samples by reverse transcriptase-polymerase chain reaction analysis. To determine whether EGF induces ARF6 expression in human glioblastoma U87 cells through transcriptional regulation and EGFR activation, the levels of ARF6 were assayed in EGF-treated U87 cells that were preincubated with a transcriptional inhibitor (actinomycin D) and an EGFR tyrosine kinase inhibitor (PD153035), respectively. The downstream signaling of EGFR-mediated ARF6 up-regulation also was investigated using specific inhibitors of mitogen-activated protein kinase (MEK), phosphatidylinositol 3' kinase (PI3K), and Janus kinase 2. The involvement of SP1 in the downstream signaling was studied by using an SP1 inhibitor (mithramycin A). Small-interfering RNAs (siRNAs) targeting ARF6 were used to investigate the effects of ARF6 on EGF-mediated glioma cell proliferation. RESULTS : The results demonstrated that ARF6 and EGFR mRNA levels were elevated in glioma tissues. Furthermore, EGF stimulated ARF6 expression in U87 cells in a dose-dependent and time-dependant manner. This stimulation was caused by increased transcription of ARF6 and by activation of the MEK/extracellular signal-regulated kinase 1 and 2 (ERK1/2) and PI3K signaling pathways. It is noteworthy that SP1 was essential for EGF-induced ARF6 up-regulation. Finally, EGF-induced glioblastoma cell proliferation depended on ARF6, because the suppression of ARF6 by siRNA or by a dominant-negative mutant significantly inhibited EGF-induced cell proliferation. CONCLUSIONS : The results of the current study suggested that EGF-induced ARF6 expression plays a significant role in glioma cell proliferation. Cancer 2009. (c) 2009 American Cancer Society.
Collapse
Affiliation(s)
- Ming Li
- Department of Chemistry, Open Laboratory of Chemical Biology, the University of Hong Kong, Hong Kong, China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Yano H, Kobayashi I, Onodera Y, Luton F, Franco M, Mazaki Y, Hashimoto S, Iwai K, Ronai Z, Sabe H. Fbx8 makes Arf6 refractory to function via ubiquitination. Mol Biol Cell 2007; 19:822-32. [PMID: 18094045 DOI: 10.1091/mbc.e07-08-0763] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The small GTP-binding protein Arf6 regulates membrane remodeling at cell peripheries and plays crucial roles in higher orders of cellular functions including tumor invasion. Here we show that Fbx8, an F-box protein bearing the Sec7 domain, mediates ubiquitination of Arf6. This ubiquitination did not appear to be linked to immediate proteasomal degradation of Arf6, whereas Fbx8 knockdown caused hyperactivation of Arf6. Expression of Fbx8 protein was substantially lost in several breast tumor cell lines, in which Arf6 activity is pivotal for their invasion. Forced expression of Fbx8 in these cells suppressed their Arf6 activities and invasive activities, in which the F-box and Sec7 domains of Fbx8 are required. Together with the possible mechanism as to how Fbx8-mediated ubiquitination interferes with the functions of Arf6, we propose that Fbx8 provides a novel suppressive control of Arf6 activity through noncanonical ubiquitination. Our results indicate that dysfunction of Fbx8 expression may contribute to the invasiveness of some breast cancer cells.
Collapse
Affiliation(s)
- Hajime Yano
- Department of Molecular Biology, Osaka Bioscience Institute, Osaka 565-0874, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|