1
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Perez RC, Yang X, Familari M, Martinez G, Lovicu FJ, Hime GR, de Iongh RU. TOB1 and TOB2 mark distinct RNA processing granules in differentiating lens fiber cells. J Mol Histol 2024; 55:121-138. [PMID: 38165569 DOI: 10.1007/s10735-023-10177-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 11/12/2023] [Indexed: 01/04/2024]
Abstract
Differentiation of lens fiber cells involves a complex interplay of signals from growth factors together with tightly regulated gene expression via transcriptional and post-transcriptional regulators. Various studies have demonstrated that RNA-binding proteins, functioning in ribonucleoprotein granules, have important roles in regulating post-transcriptional expression during lens development. In this study, we examined the expression and localization of two members of the BTG/TOB family of RNA-binding proteins, TOB1 and TOB2, in the developing lens and examined the phenotype of mice that lack Tob1. By RT-PCR, both Tob1 and Tob2 mRNA were detected in epithelial and fiber cells of embryonic and postnatal murine lenses. In situ hybridization showed Tob1 and Tob2 mRNA were most intensely expressed in the early differentiating fibers, with weaker expression in anterior epithelial cells, and both appeared to be downregulated in the germinative zone of E15.5 lenses. TOB1 protein was detected from E11.5 to E16.5 and was predominantly detected in large cytoplasmic puncta in early differentiating fiber cells, often co-localizing with the P-body marker, DCP2. Occasional nuclear puncta were also observed. By contrast, TOB2 was detected in a series of interconnected peri-nuclear granules, in later differentiating fiber cells of the inner cortex. TOB2 did not appear to co-localize with DCP2 but did partially co-localize with an early stress granule marker (EIF3B). These data suggest that TOB1 and TOB2 are involved with different aspects of the mRNA processing cycle in lens fiber cells. In vitro experiments using rat lens epithelial explants treated with or without a fiber differentiating dose of FGF2 showed that both TOB1 and TOB2 were up-regulated during FGF-induced differentiation. In differentiating explants, TOB1 also co-localized with DCP2 in large cytoplasmic granules. Analyses of Tob1-/- mice revealed relatively normal lens morphology but a subtle defect in cell cycle arrest of some cells at the equator and in the lens fiber mass of E13.5 embryos. Overall, these findings suggest that TOB proteins play distinct regulatory roles in RNA processing during lens fiber differentiation.
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Affiliation(s)
- Rafaela C Perez
- Ocular Development Laboratory, Anatomy & Physiology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Xenia Yang
- Ocular Development Laboratory, Anatomy & Physiology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Mary Familari
- School of Biosciences, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Gemma Martinez
- Ocular Development Laboratory, Anatomy & Physiology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Frank J Lovicu
- Molecular and Cellular Biomedicine, School of Medical Sciences and Save Sight Institute, University of Sydney, Sydney, NSW, 2006, Australia
| | - Gary R Hime
- Stem Cell Genetics Laboratory, Anatomy & Physiology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Robb U de Iongh
- Ocular Development Laboratory, Anatomy & Physiology, University of Melbourne, Parkville, VIC, 3010, Australia.
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2
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Shan LY, Tian Y, Liu WX, Fan HT, Li FG, Liu WJ, Li A, Shen W, Sun QY, Liu YB, Zhou Y, Zhang T. LSM14B controls oocyte mRNA storage and stability to ensure female fertility. Cell Mol Life Sci 2023; 80:247. [PMID: 37578641 PMCID: PMC10425512 DOI: 10.1007/s00018-023-04898-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 07/07/2023] [Accepted: 07/24/2023] [Indexed: 08/15/2023]
Abstract
Controlled mRNA storage and stability is essential for oocyte meiosis and early embryonic development. However, how to regulate mRNA storage and stability in mammalian oogenesis remains elusive. Here we showed that LSM14B, a component of membraneless compartments including P-body-like granules and mitochondria-associated ribonucleoprotein domain (MARDO) in germ cell, is indispensable for female fertility. To reveal loss of LSM14B disrupted primordial follicle assembly and caused mRNA reduction in non-growing oocytes, which was concomitant with the impaired assembly of P-body-like granules. 10× Genomics single-cell RNA-sequencing and immunostaining were performed. Meanwhile, we conducted RNA-seq analysis of GV-stage oocytes and found that Lsm14b deficiency not only impaired the maternal mRNA accumulation but also disrupted the translation in fully grown oocytes, which was closely associated with dissolution of MARDO components. Moreover, Lsm14b-deficient oocytes reassembled a pronucleus containing decondensed chromatin after extrusion of the first polar body, through compromising the activation of maturation promoting factor, while the defects were restored via WEE1/2 inhibitor. Together, our findings reveal that Lsm14b plays a pivotal role in mammalian oogenesis by specifically controlling of oocyte mRNA storage and stability.
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Affiliation(s)
- Li-Ying Shan
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock (R2BGL), College of Life Sciences, Inner Mongolia University, Hohhot, 010070, China
| | - Yu Tian
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock (R2BGL), College of Life Sciences, Inner Mongolia University, Hohhot, 010070, China
| | - Wen-Xiang Liu
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock (R2BGL), College of Life Sciences, Inner Mongolia University, Hohhot, 010070, China
| | - Hai-Tao Fan
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock (R2BGL), College of Life Sciences, Inner Mongolia University, Hohhot, 010070, China
| | - Feng-Guo Li
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock (R2BGL), College of Life Sciences, Inner Mongolia University, Hohhot, 010070, China
| | - Wen-Juan Liu
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock (R2BGL), College of Life Sciences, Inner Mongolia University, Hohhot, 010070, China
| | - Ang Li
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock (R2BGL), College of Life Sciences, Inner Mongolia University, Hohhot, 010070, China
- Fertility Preservation Lab, Guangdong-Hong Kong Metabolism & Reproduction Joint Laboratory, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, 510317, China
| | - Wei Shen
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Qing-Yuan Sun
- Fertility Preservation Lab, Guangdong-Hong Kong Metabolism & Reproduction Joint Laboratory, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, 510317, China
| | - Yong-Bin Liu
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock (R2BGL), College of Life Sciences, Inner Mongolia University, Hohhot, 010070, China.
| | - Yang Zhou
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock (R2BGL), College of Life Sciences, Inner Mongolia University, Hohhot, 010070, China.
| | - Teng Zhang
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock (R2BGL), College of Life Sciences, Inner Mongolia University, Hohhot, 010070, China.
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3
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Pacchini S, Piva E, Schumann S, Irato P, Pellegrino D, Santovito G. An Experimental Study on Antioxidant Enzyme Gene Expression in Trematomus newnesi ( Boulenger, 1902) Experimentally Exposed to Perfluoro-Octanoic Acid. Antioxidants (Basel) 2023; 12:antiox12020352. [PMID: 36829911 PMCID: PMC9951861 DOI: 10.3390/antiox12020352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/26/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023] Open
Abstract
Antarctica is the continent with the lowest local human impact; however, it is susceptible to pollution from external sources. Emerging pollutants such as perfluoroalkyl substances pose an increasing threat to this environment and therefore require more in-depth investigations to understand their environmental fate and biological impacts. The present study focuses on expression analysis at the transcriptional level of genes coding for four antioxidant enzymes (sod1, sod2, gpx1, and gpx4) in the liver and kidney of an Antarctic fish species, Trematomus newnesi (Boulenger, 1902). mRNA levels were also assessed in fish exposed to 1.5 μg/L of perfluoro-octanoic acid for 10 days. The kidney showed a higher level of expression than the liver in wildlife specimens. In the liver, the treatment induced an increase in gene expression for all the considered enzymes, whereas in the kidney, it induced a general decrease. The obtained results advance the scientific community's understanding of how the potential future presence of anthropogenic contaminants in the Southern Ocean can affect the antioxidant system of Antarctic fishes. The presence of pollutants belonging to the perfluoroalkyl substances in the Southern Ocean needs to be continuously monitored in parallel with this type of research.
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Affiliation(s)
- Sara Pacchini
- Department of Biology, University of Padova, 35131 Padova, Italy
| | - Elisabetta Piva
- Department of Biology, University of Padova, 35131 Padova, Italy
| | - Sophia Schumann
- Department of Biology, University of Padova, 35131 Padova, Italy
| | - Paola Irato
- Department of Biology, University of Padova, 35131 Padova, Italy
| | - Daniela Pellegrino
- Department of Biology, Ecology and Earth Sciences, University of Calabria, 87036 Rende, Italy
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4
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Pisani C, Onori A, Gabanella F, Di Certo MG, Passananti C, Corbi N. Identification of protein/mRNA network involving the PSORS1 locus gene CCHCR1 and the PSORS4 locus gene HAX1. Exp Cell Res 2021; 399:112471. [PMID: 33417922 DOI: 10.1016/j.yexcr.2021.112471] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 12/22/2020] [Accepted: 12/30/2020] [Indexed: 01/22/2023]
Abstract
CCHCR1 (Coiled-Coil alpha-Helical Rod 1), maps to chromosomal region 6p21.3, within the major psoriasis susceptibility locus PSORS1. CCHCR1 itself is a plausible psoriasis candidate gene, however its role in psoriasis pathogenesis remains unclear. We previously demonstrated that CCHCR1 protein acts as a cytoplasmic docking site for RNA polymerase II core subunit 3 (RPB3) in cycling cells, suggesting a role for CCHCR1 in vesicular trafficking between cellular compartments. Here, we report a novel interaction between CCHCR1 and the RNA binding protein HAX1. HAX1 maps to chromosomal region 1q21.3 within the PSORS4 locus and is over-expressed in psoriasis. Both CCHCR1 and HAX1 share subcellular co-localization with mitochondria, nuclei and cytoplasmic vesicles as P-bodies. By a series of ribonucleoprotein immunoprecipitation (RIP) assays, we isolated a pool of mRNAs complexed with HAX1 and/or CCHCR1 proteins. Among the mRNAs complexed with both CCHCR1 and HAX1 proteins, there are Vimentin mRNA, previously described to be bound by HAX1, and CAMP/LL37 mRNA, whose gene product is over-expressed in psoriasis.
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Affiliation(s)
- Cinzia Pisani
- CNR-Institute of Molecular Biology and Pathology, Department of Molecular Medicine, Sapienza University of Rome, Italy.
| | - Annalisa Onori
- CNR-Institute of Molecular Biology and Pathology, Department of Molecular Medicine, Sapienza University of Rome, Italy.
| | - Francesca Gabanella
- CNR-Institute of Molecular Biology and Pathology, Department of Molecular Medicine, Sapienza University of Rome, Italy; CNR-Institute of Biochemistry and Cell Biology, Department of Sense Organs, Sapienza University of Rome, Italy.
| | - Maria Grazia Di Certo
- CNR-Institute of Biochemistry and Cell Biology, Department of Sense Organs, Sapienza University of Rome, Italy.
| | - Claudio Passananti
- CNR-Institute of Molecular Biology and Pathology, Department of Molecular Medicine, Sapienza University of Rome, Italy.
| | - Nicoletta Corbi
- CNR-Institute of Molecular Biology and Pathology, Department of Molecular Medicine, Sapienza University of Rome, Italy.
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5
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Bonato M, Corrà F, Bellio M, Guidolin L, Tallandini L, Irato P, Santovito G. PFAS Environmental Pollution and Antioxidant Responses: An Overview of the Impact on Human Field. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E8020. [PMID: 33143342 PMCID: PMC7663035 DOI: 10.3390/ijerph17218020] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 10/23/2020] [Accepted: 10/27/2020] [Indexed: 01/09/2023]
Abstract
Due to their unique properties, perfluorinated substances (PFAS) are widely used in multiple industrial and commercial applications, but they are toxic for animals, humans included. This review presents some available data on the PFAS environmental distribution in the world, and in particular in Europe and in the Veneto region of Italy, where it has become a serious problem for human health. The consumption of contaminated food and drinking water is considered one of the major source of exposure for humans. Worldwide epidemiological studies report the negative effects that PFAS have on human health, due to environmental pollution, including infertility, steroid hormone perturbation, thyroid, liver and kidney disorders, and metabolic disfunctions. In vitro and in vivo researches correlated PFAS exposure to oxidative stress effects (in mammals as well as in other vertebrates of human interest), produced by a PFAS-induced increase of reactive oxygen species formation. The cellular antioxidant defense system is activated by PFAS, but it is only partially able to avoid the oxidative damage to biomolecules.
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Affiliation(s)
| | | | | | | | | | - Paola Irato
- Department of Biology, University of Padova, 35131 Padova, Italy; (M.B.); (F.C.); (M.B.); (L.G.); (L.T.)
| | - Gianfranco Santovito
- Department of Biology, University of Padova, 35131 Padova, Italy; (M.B.); (F.C.); (M.B.); (L.G.); (L.T.)
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6
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Ferro D, Bakiu R, Pucciarelli S, Miceli C, Vallesi A, Irato P, Santovito G. Molecular Characterization, Protein-Protein Interaction Network, and Evolution of Four Glutathione Peroxidases from Tetrahymena thermophila. Antioxidants (Basel) 2020; 9:antiox9100949. [PMID: 33023127 PMCID: PMC7600574 DOI: 10.3390/antiox9100949] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 09/29/2020] [Accepted: 10/01/2020] [Indexed: 11/23/2022] Open
Abstract
Glutathione peroxidases (GPxs) form a broad family of antioxidant proteins essential for maintaining redox homeostasis in eukaryotic cells. In this study, we used an integrative approach that combines bioinformatics, molecular biology, and biochemistry to investigate the role of GPxs in reactive oxygen species detoxification in the unicellular eukaryotic model organism Tetrahymena thermophila. Both phylogenetic and mechanistic empirical model analyses provided indications about the evolutionary relationships among the GPXs of Tetrahymena and the orthologous enzymes of phylogenetically related species. In-silico gene characterization and text mining were used to predict the functional relationships between GPxs and other physiologically-relevant processes. The GPx genes contain conserved transcriptional regulatory elements in the promoter region, which suggest that transcription is under tight control of specialized signaling pathways. The bioinformatic findings were next experimentally validated by studying the time course of gene transcription and enzymatic activity after copper (Cu) exposure. Results emphasize the role of GPxs in the detoxification pathways that, by complex regulation of GPx gene expression, enable Tethraymena to survive in high Cu concentrations and the associated redox environment.
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Affiliation(s)
- Diana Ferro
- BIO5 Institute, University of Arizona, Tucson, AZ 85719, USA;
- Department of Pediatrics, Children’s Mercy Hospital and Clinics, Kansas City, MO 64108, USA
| | - Rigers Bakiu
- Department of Aquaculture and Fisheries, Agricultural University of Tirana, 1000 Tiranë, Albania;
| | - Sandra Pucciarelli
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (S.P.); (C.M.); (A.V.)
| | - Cristina Miceli
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (S.P.); (C.M.); (A.V.)
| | - Adriana Vallesi
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (S.P.); (C.M.); (A.V.)
| | - Paola Irato
- Department of Biology, University of Padova, 35131 Padova, Italy;
| | - Gianfranco Santovito
- Department of Biology, University of Padova, 35131 Padova, Italy;
- Correspondence:
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7
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Chatzidimitriou E, Bisaccia P, Corrà F, Bonato M, Irato P, Manuto L, Toppo S, Bakiu R, Santovito G. Copper/Zinc Superoxide Dismutase from the Crocodile Icefish Chionodraco hamatus: Antioxidant Defense at Constant Sub-Zero Temperature. Antioxidants (Basel) 2020; 9:antiox9040325. [PMID: 32316382 PMCID: PMC7222407 DOI: 10.3390/antiox9040325] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 04/13/2020] [Accepted: 04/14/2020] [Indexed: 12/11/2022] Open
Abstract
In the present study, we describe the purification and molecular characterization of Cu,Zn superoxide dismutase (SOD) from Chionodraco hamatus, an Antarctic teleost widely distributed in many areas of the Ross Sea that plays a pivotal role in the Antarctic food chain. The primary sequence was obtained using biochemical and molecular biology approaches and compared with Cu,Zn SODs from other organisms. Multiple sequence alignment using the amino acid sequence revealed that Cu,Zn SOD showed considerable sequence similarity with its orthologues from various vertebrate species, but also some specific substitutions directly linked to cold adaptation. Phylogenetic analyses presented the monophyletic status of Antartic Teleostei among the Perciformes, confirming the erratic differentiation of these proteins and concurring with the theory of the "unclock-like" behavior of Cu,Zn SOD evolution. Expression of C. hamatus Cu,Zn SOD at both the mRNA and protein levels were analyzed in various tissues, highlighting the regulation of gene expression related to environmental stress conditions and also animal physiology. The data presented are the first on the antioxidant enzymes of a fish belonging to the Channichthyidae family and represent an important starting point in understanding the antioxidant systems of these organisms that are subject to constant risk of oxidative stress.
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Affiliation(s)
- Evangelia Chatzidimitriou
- Institute of Natural Resource Sciences, ZHAW Zurich University of Applied Sciences, 8820 Wädenswil, Switzerland;
| | - Paola Bisaccia
- Department of Biology, University of Padova, 35131 Padova, Italy; (P.B.); (F.C.); (M.B.); (P.I.)
| | - Francesca Corrà
- Department of Biology, University of Padova, 35131 Padova, Italy; (P.B.); (F.C.); (M.B.); (P.I.)
| | - Marco Bonato
- Department of Biology, University of Padova, 35131 Padova, Italy; (P.B.); (F.C.); (M.B.); (P.I.)
| | - Paola Irato
- Department of Biology, University of Padova, 35131 Padova, Italy; (P.B.); (F.C.); (M.B.); (P.I.)
| | - Laura Manuto
- Department of Molecular Medicine, University of Padova, 35131 Padova, Italy; (L.M.); (S.T.)
| | - Stefano Toppo
- Department of Molecular Medicine, University of Padova, 35131 Padova, Italy; (L.M.); (S.T.)
- CRIBI Biotech Centre, University of Padova, 35131 Padova, Italy
| | - Rigers Bakiu
- Department of Aquaculture and Fisheries, Agricultural University of Tirana, 1000 Tiranë, Albania;
| | - Gianfranco Santovito
- Department of Biology, University of Padova, 35131 Padova, Italy; (P.B.); (F.C.); (M.B.); (P.I.)
- Correspondence:
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8
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Neueder A. RNA-Mediated Disease Mechanisms in Neurodegenerative Disorders. J Mol Biol 2018; 431:1780-1791. [PMID: 30597161 DOI: 10.1016/j.jmb.2018.12.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 12/14/2018] [Accepted: 12/16/2018] [Indexed: 12/16/2022]
Abstract
RNA is accurately entangled in virtually all pathways that maintain cellular homeostasis. To name but a few, RNA is the "messenger" between DNA encoded information and the resulting proteins. Furthermore, RNAs regulate diverse processes by forming DNA::RNA or RNA::RNA interactions. Finally, RNA itself can be the scaffold for ribonucleoprotein complexes, for example, ribosomes or cellular bodies. Consequently, disruption of any of these processes can lead to disease. This review describes known and emerging RNA-based disease mechanisms like interference with regular splicing, the anomalous appearance of RNA-protein complexes and uncommon RNA species, as well as non-canonical translation. Due to the complexity and entanglement of the above-mentioned pathways, only few drugs are available that target RNA-based disease mechanisms. However, advances in our understanding how RNA is involved in and modulates cellular homeostasis might pave the way to novel treatments.
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Affiliation(s)
- Andreas Neueder
- Experimental Neurology, Department of Neurology, Ulm University, 89081 Ulm, Germany.
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9
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Nganou G, Silva CG, Gladwyn-Ng I, Engel D, Coumans B, Delgado-Escueta AV, Tanaka M, Nguyen L, Grisar T, de Nijs L, Lakaye B. Importin-8 Modulates Division of Apical Progenitors, Dendritogenesis and Tangential Migration During Development of Mouse Cortex. Front Mol Neurosci 2018; 11:234. [PMID: 30042658 PMCID: PMC6048241 DOI: 10.3389/fnmol.2018.00234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 06/13/2018] [Indexed: 01/18/2023] Open
Abstract
The building of the brain is a multistep process that requires the coordinate expression of thousands of genes and an intense nucleocytoplasmic transport of RNA and proteins. This transport is mediated by karyopherins that comprise importins and exportins. Here, we investigated the role of the ß-importin, importin-8 (IPO8) during mouse cerebral corticogenesis as several of its cargoes have been shown to be essential during this process. First, we showed that Ipo8 mRNA is expressed in mouse brain at various embryonic ages with a clear signal in the sub-ventricular/ventricular zone (SVZ/VZ), the cerebral cortical plate (CP) and the ganglionic eminences. We found that acute knockdown of IPO8 in cortical progenitors reduced both their proliferation and cell cycle exit leading to the increase in apical progenitor pool without influencing the number of basal progenitors (BPs). Projection neurons ultimately reached their appropriate cerebral cortical layer, but their dendritogenesis was specifically affected, resulting in neurons with reduced dendrite complexity. IPO8 knockdown also slowed the migration of cortical interneurons. Together, our data demonstrate that IPO8 contribute to the coordination of several critical steps of cerebral cortex development. These results suggest that the impairment of IPO8 function might be associated with some diseases of neuronal migration defects.
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Affiliation(s)
- Gerry Nganou
- GIGA-Neurosciences, University of Liege, Liege, Belgium.,GENESS International Consortium, Los Angeles, CA, United States
| | - Carla G Silva
- GIGA-Neurosciences, University of Liege, Liege, Belgium
| | | | | | - Bernard Coumans
- GIGA-Neurosciences, University of Liege, Liege, Belgium.,GENESS International Consortium, Los Angeles, CA, United States
| | - Antonio V Delgado-Escueta
- GENESS International Consortium, Los Angeles, CA, United States.,Epilepsy Genetics/Genomics Lab, Neurology and Research Services, VA Greater Los Angeles Healthcare System (VA GLAHS), University of California, Los Angeles, Los Angeles, CA, United States
| | - Miyabi Tanaka
- GENESS International Consortium, Los Angeles, CA, United States.,Epilepsy Genetics/Genomics Lab, Neurology and Research Services, VA Greater Los Angeles Healthcare System (VA GLAHS), University of California, Los Angeles, Los Angeles, CA, United States
| | | | - Thierry Grisar
- GIGA-Neurosciences, University of Liege, Liege, Belgium.,GENESS International Consortium, Los Angeles, CA, United States
| | - Laurence de Nijs
- GENESS International Consortium, Los Angeles, CA, United States.,MHeNS, Maastricht University, Maastricht, Netherlands
| | - Bernard Lakaye
- GIGA-Neurosciences, University of Liege, Liege, Belgium.,GENESS International Consortium, Los Angeles, CA, United States
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10
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Natkańska U, Skoneczna A, Skoneczny M. Oxidative stress triggers aggregation of GFP-tagged Hsp31p, the budding yeast environmental stress response chaperone, and glyoxalase III. Cell Stress Chaperones 2018; 23:595-607. [PMID: 29264711 PMCID: PMC6045530 DOI: 10.1007/s12192-017-0868-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 12/01/2017] [Accepted: 12/07/2017] [Indexed: 12/24/2022] Open
Abstract
The Saccharomyces cerevisiae Hsp31p protein belongs to the ubiquitous DJ-1/ThiJ/PfpI family. The most prominent member of this family is human DJ-1; defects of this protein are associated with Parkinson's disease pathogenesis. Numerous recent findings reported by our group and others have revealed the importance of Hsp31p for survival in the post-diauxic phase of cell growth and under diverse environmental stresses. Hsp31p was shown to possess glutathione-independent glyoxalase III activity and to function as a protein chaperone, suggesting that it has multiple cellular roles. Our previous work also revealed that HSP31 gene expression was controlled by multiple stress-related transcription factors, which mediated HSP31 promoter responses to oxidative, osmotic, and thermal stresses, toxic products of glycolysis, and the diauxic shift. Nevertheless, the exact role of Hsp31p within budding yeast cells remains elusive. Here, we aimed to obtain insights into the function of Hsp31p based on its intracellular localization. We have demonstrated that the Hsp31p-GFP fusion protein is localized to the cytosol under most environmental conditions and that it becomes particulate in response to oxidative stress. However, the particles do not colocalize with other granular subcellular structures present in budding yeast cells. The observed particulate localization does not seem to be important for Hsp31p functionality. Instead, it is likely the result of oxidative damage, as the particle abundance increases when Hsp31p is nonfunctional, when the cellular oxidative stress response is affected, or when cellular maintenance systems that optimize the state of the proteome are compromised.
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Affiliation(s)
- Urszula Natkańska
- Institute of Biochemistry and Biophysics, Department of Genetics, Polish Academy of Sciences, Pawińskiego 5A, 02-106, Warszawa, Poland
| | - Adrianna Skoneczna
- Institute of Biochemistry and Biophysics, Laboratory of Mutagenesis and DNA Repair, Polish Academy of Sciences, Pawińskiego 5A, 02-106, Warszawa, Poland
| | - Marek Skoneczny
- Institute of Biochemistry and Biophysics, Department of Genetics, Polish Academy of Sciences, Pawińskiego 5A, 02-106, Warszawa, Poland.
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11
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Meng J, Wang WX, Li L, Zhang G. Respiration disruption and detoxification at the protein expression levels in the Pacific oyster (Crassostrea gigas) under zinc exposure. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 191:34-41. [PMID: 28780297 DOI: 10.1016/j.aquatox.2017.07.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 07/17/2017] [Accepted: 07/19/2017] [Indexed: 06/07/2023]
Abstract
The Pacific oyster (Crassostrea gigas) can accumulate high levels of zinc (Zn) without obvious toxicity, but the related molecular mechanisms are largely unknown. In the present study, C. gigas were exposed to excess Zn for 9days and the differentially expressed proteins (DEPs) were examined using the isobaric tags for relative and absolute quantitation (iTRAQ) method. In total, 2667 proteins containing at least two peptides and detected in both replicates were used for proteomic analysis. Among these DEPs, 332 were up-regulated and 282 were down-regulated. KEGG enrichment analysis of DEPs revealed that Zn exposure mainly distrubed 'tricarboxylic acid (TCA) cycle', 'electron transport chain (ETC)' and 'glutathione (GSH) metabolism' processes in oysters. Further key protein expressions enriched in these metabolism pathways were analyzed. In TCA cycle, Zn inhibited the Fe-containing protein expressions, which may lead to the accumulation of succinate and induce anaerobiosis. In ETC metabolism process, Zn inhibited ETC complex protein expressions, including complex I-IV, which may affect the electron transport process. Furthermore, Zn induced phytochelatin (PC) and glutathione peroxidase (GPX) expression in GSH catabolism. The proteins play important roles in Zn detoxification and ROS elimination process. The transcriptional expressions of genes encoding these proteins were observed using real-time PCR analysis, and there was good consistency between these two datasets. Overall, we provide direct evidence for Zn toxicity and detoxification mechanisms at protein level.
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Affiliation(s)
- Jie Meng
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Shandong, China; Laboratory for Marine Fisheries and Aquaculture, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, China; National & Local Joint Engineering Laboratory of Ecological Mariculture, Qingdao 266071, Shandong, China
| | - Wen-Xiong Wang
- Marine Environmental Laboratory, HKUST Shenzhen Research Institute, Shenzhen 518057, China
| | - Li Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Shandong, China; Laboratory for Marine Fisheries and Aquaculture, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, China; National & Local Joint Engineering Laboratory of Ecological Mariculture, Qingdao 266071, Shandong, China.
| | - Guofan Zhang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Shandong, China; National & Local Joint Engineering Laboratory of Ecological Mariculture, Qingdao 266071, Shandong, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, Shandong, China.
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12
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Zhang Y, Tang C, Yu T, Zhang R, Zheng H, Yan W. MicroRNAs control mRNA fate by compartmentalization based on 3' UTR length in male germ cells. Genome Biol 2017; 18:105. [PMID: 28615029 PMCID: PMC5471846 DOI: 10.1186/s13059-017-1243-x] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 05/23/2017] [Indexed: 12/18/2022] Open
Abstract
Background Post-transcriptional regulation of gene expression can be achieved through the control of mRNA stability, cytoplasmic compartmentalization, 3′ UTR length and translational efficacy. Spermiogenesis, a process through which haploid male germ cells differentiate into spermatozoa, represents an ideal model for studying post-transcriptional regulation in vivo because it involves a large number of transcripts that are physically sequestered in ribonucleoprotein particles (RNPs) and thus subjected to delayed translation. To explore how small RNAs regulate mRNA fate, we conducted RNA-Seq analyses to determine not only the levels of both mRNAs and small noncoding RNAs, but also their cytoplasmic compartmentalization during spermiogenesis. Result Among all small noncoding RNAs studied, miRNAs displayed the most dynamic changes in both abundance and subcytoplasmic localization. mRNAs with shorter 3′ UTRs became increasingly enriched in RNPs from pachytene spermatocytes to round spermatids, and the enrichment of shorter 3′ UTR mRNAs in RNPs coincided with newly synthesized miRNAs that target these mRNAs at sites closer to the stop codon. In contrast, the translocation of longer 3′ UTR mRNAs from RNPs to polysomes correlated with the production of new miRNAs that target these mRNAs at sites distal to the stop codon. Conclusions miRNAs appear to control cytoplasmic compartmentalization of mRNAs based on 3′ UTR length. Our data suggest that transcripts with longer 3′ UTRs tend to contain distal miRNA binding sites and are thus targeted to polysomes for translation followed by degradation. In contrast, those with shorter 3′ UTRs only possess proximal miRNA binding sites, which, therefore, are targeted into RNPs for enrichment and delayed translation. Electronic supplementary material The online version of this article (doi:10.1186/s13059-017-1243-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ying Zhang
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Center for Molecular Medicine, Room 207B, 1664 North Virginia Street, MS/0575, Reno, NV, 89557, USA
| | - Chong Tang
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Center for Molecular Medicine, Room 207B, 1664 North Virginia Street, MS/0575, Reno, NV, 89557, USA
| | - Tian Yu
- Department of Biology, University of Nevada, Reno, 1664 North Virginia Street, MS575, Reno, NV, 89557, USA
| | - Ruirui Zhang
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Center for Molecular Medicine, Room 207B, 1664 North Virginia Street, MS/0575, Reno, NV, 89557, USA
| | - Huili Zheng
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Center for Molecular Medicine, Room 207B, 1664 North Virginia Street, MS/0575, Reno, NV, 89557, USA
| | - Wei Yan
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Center for Molecular Medicine, Room 207B, 1664 North Virginia Street, MS/0575, Reno, NV, 89557, USA. .,Department of Biology, University of Nevada, Reno, 1664 North Virginia Street, MS575, Reno, NV, 89557, USA.
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Casal M, Queirós O, Talaia G, Ribas D, Paiva S. Carboxylic Acids Plasma Membrane Transporters in Saccharomyces cerevisiae. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 892:229-251. [PMID: 26721276 DOI: 10.1007/978-3-319-25304-6_9] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
This chapter covers the functionally characterized plasma membrane carboxylic acids transporters Jen1, Ady2, Fps1 and Pdr12 in the yeast Saccharomyces cerevisiae, addressing also their homologues in other microorganisms, as filamentous fungi and bacteria. Carboxylic acids can either be transported into the cells, to be used as nutrients, or extruded in response to acid stress conditions. The secondary active transporters Jen1 and Ady2 can mediate the uptake of the anionic form of these substrates by a H(+)-symport mechanism. The undissociated form of carboxylic acids is lipid-soluble, crossing the plasma membrane by simple diffusion. Furthermore, acetic acid can also be transported by facilitated diffusion via Fps1 channel. At the cytoplasmic physiological pH, the anionic form of the acid prevails and it can be exported by the Pdr12 pump. This review will highlight the mechanisms involving carboxylic acids transporters, and the way they operate according to the yeast cell response to environmental changes, as carbon source availability, extracellular pH and acid stress conditions.
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Affiliation(s)
- Margarida Casal
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
| | - Odília Queirós
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
- CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Rua Central de Gandra, 1317, 4585-116, Gandra, PRD, Portugal
| | - Gabriel Talaia
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - David Ribas
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Sandra Paiva
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
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Aulas A, Vande Velde C. Alterations in stress granule dynamics driven by TDP-43 and FUS: a link to pathological inclusions in ALS? Front Cell Neurosci 2015; 9:423. [PMID: 26557057 PMCID: PMC4615823 DOI: 10.3389/fncel.2015.00423] [Citation(s) in RCA: 160] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 10/06/2015] [Indexed: 12/12/2022] Open
Abstract
Stress granules (SGs) are RNA-containing cytoplasmic foci formed in response to stress exposure. Since their discovery in 1999, over 120 proteins have been described to be localized to these structures (in 154 publications). Most of these components are RNA binding proteins (RBPs) or are involved in RNA metabolism and translation. SGs have been linked to several pathologies including inflammatory diseases, cancer, viral infection, and neurodegenerative diseases such as amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). In ALS and FTD, the majority of cases have no known etiology and exposure to external stress is frequently proposed as a contributor to either disease initiation or the rate of disease progression. Of note, both ALS and FTD are characterized by pathological inclusions, where some well-known SG markers localize with the ALS related proteins TDP-43 and FUS. We propose that TDP-43 and FUS serve as an interface between genetic susceptibility and environmental stress exposure in disease pathogenesis. Here, we will discuss the role of TDP-43 and FUS in SG dynamics and how disease-linked mutations affect this process.
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Affiliation(s)
- Anaïs Aulas
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal Montréal, QC, Canada ; Department of Biochemistry, Université de Montréal Montréal, QC, Canada
| | - Christine Vande Velde
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal Montréal, QC, Canada ; Department of Neurosciences, Université de Montréal Montréal, QC, Canada
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15
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Gregoire F, Lucidi V, Zerrad-Saadi A, Virreira M, Bolaky N, Delforge V, Lemmers A, Donckier V, Devière J, Demetter P, Perret J, Delporte C. Analysis of aquaporin expression in liver with a focus on hepatocytes. Histochem Cell Biol 2015; 144:347-63. [PMID: 26126651 DOI: 10.1007/s00418-015-1341-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/16/2015] [Indexed: 12/30/2022]
Abstract
A deeper understanding of aquaporins (AQPs) expression and transcriptional regulation will provide useful information for liver pathophysiology. We established a complete AQPs mRNA expression profile in human and mouse liver, as well as protein localization of expressed AQPs. Additionally, the modulation of AQPs mRNA levels in response to various agents was determined in human HuH7 cells and in primary culture of mouse hepatocytes. AQP1, AQP3, AQP7, AQP8, and AQP9 mRNA and protein expressions were detected in human liver, while only AQP6 and AQP11 mRNAs were detected. We reported for the first time the localization of AQP3 in Kupffer cells, AQP7 in hepatocytes and endothelial cells, and AQP9 in cholangiocytes. In addition, we confirmed the localization of AQP1 in endothelial cells, and of AQP8 and AQP9 in hepatocytes. On HuH7 cells, we reported the presence of AQP4 mRNA, confirmed the presence of AQP3, AQP7, and AQP11 mRNAs, but not of AQP8 mRNA. On primary culture of murine hepatocytes, AQP1 and AQP7 mRNAs were identified, while the presence of AQP3, AQP8, AQP9, and AQP11 mRNAs was confirmed. At the protein level, murine endothelial liver cells expressed AQP1 and AQP9, while hepatocytes expressed AQP3, AQP7, AQP8, and AQP9, and macrophages expressed AQP3. Dexamethasone, forskolin, AICAR, rosiglitazone, octanoylated, and non-octanoylated ghrelin regulated some AQP expression in primary culture of murine hepatocytes and human HuH7 cells. Additional studies will be required to further assess the role of AQPs expression in human and murine liver and understand the transcriptional regulation of AQPs in hepatocytes under pathophysiological conditions.
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Affiliation(s)
- Françoise Gregoire
- Laboratory of Pathophysiological and Nutritional Biochemistry, Université Libre de Bruxelles, Brussels, Belgium
| | - Valério Lucidi
- Digestive Oncology Department, Erasme Hospital, Brussels, Belgium
| | - Amal Zerrad-Saadi
- Laboratory of Pathophysiological and Nutritional Biochemistry, Université Libre de Bruxelles, Brussels, Belgium
| | - Myrna Virreira
- Laboratory of Pathophysiological and Nutritional Biochemistry, Université Libre de Bruxelles, Brussels, Belgium
| | - Nargis Bolaky
- Laboratory of Pathophysiological and Nutritional Biochemistry, Université Libre de Bruxelles, Brussels, Belgium
| | - Valérie Delforge
- Laboratory of Pathophysiological and Nutritional Biochemistry, Université Libre de Bruxelles, Brussels, Belgium
| | - Arnaud Lemmers
- Gastroenterology Department, Erasme Hospital, Brussels, Belgium
| | - Vincent Donckier
- Digestive Oncology Department, Erasme Hospital, Brussels, Belgium
| | - Jacques Devière
- Gastroenterology Department, Erasme Hospital, Brussels, Belgium
| | - Pieter Demetter
- Anatomopathology Department, Erasme Hospital, Brussels, Belgium
| | - Jason Perret
- Laboratory of Pathophysiological and Nutritional Biochemistry, Université Libre de Bruxelles, Brussels, Belgium
| | - Christine Delporte
- Laboratory of Pathophysiological and Nutritional Biochemistry, Université Libre de Bruxelles, Brussels, Belgium.
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16
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Ferro D, Bakiu R, De Pittà C, Boldrin F, Cattalini F, Pucciarelli S, Miceli C, Santovito G. Cu,Zn Superoxide Dismutases from Tetrahymena thermophila: Molecular Evolution and Gene Expression of the First Line of Antioxidant Defenses. Protist 2015; 166:131-45. [DOI: 10.1016/j.protis.2014.12.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 12/05/2014] [Accepted: 12/09/2014] [Indexed: 11/28/2022]
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17
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Mota S, Vieira N, Barbosa S, Delaveau T, Torchet C, Le Saux A, Garcia M, Pereira A, Lemoine S, Coulpier F, Darzacq X, Benard L, Casal M, Devaux F, Paiva S. Role of the DHH1 gene in the regulation of monocarboxylic acids transporters expression in Saccharomyces cerevisiae. PLoS One 2014; 9:e111589. [PMID: 25365506 PMCID: PMC4218774 DOI: 10.1371/journal.pone.0111589] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 09/26/2014] [Indexed: 01/05/2023] Open
Abstract
Previous experiments revealed that DHH1, a RNA helicase involved in the regulation of mRNA stability and translation, complemented the phenotype of a Saccharomyces cerevisiae mutant affected in the expression of genes coding for monocarboxylic-acids transporters, JEN1 and ADY2 (Paiva S, Althoff S, Casal M, Leao C. FEMS Microbiol Lett, 1999, 170:301-306). In wild type cells, JEN1 expression had been shown to be undetectable in the presence of glucose or formic acid, and induced in the presence of lactate. In this work, we show that JEN1 mRNA accumulates in a dhh1 mutant, when formic acid was used as sole carbon source. Dhh1 interacts with the decapping activator Dcp1 and with the deadenylase complex. This led to the hypothesis that JEN1 expression is post-transcriptionally regulated by Dhh1 in formic acid. Analyses of JEN1 mRNAs decay in wild-type and dhh1 mutant strains confirmed this hypothesis. In these conditions, the stabilized JEN1 mRNA was associated to polysomes but no Jen1 protein could be detected, either by measurable lactate carrier activity, Jen1-GFP fluorescence detection or western blots. These results revealed the complexity of the expression regulation of JEN1 in S. cerevisiae and evidenced the importance of DHH1 in this process. Additionally, microarray analyses of dhh1 mutant indicated that Dhh1 plays a large role in metabolic adaptation, suggesting that carbon source changes triggers a complex interplay between transcriptional and post-transcriptional effects.
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Affiliation(s)
- Sandra Mota
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, Braga, Portugal
- Centre of Health and Environmental Research (CISA), School of Allied Health Sciences, Polytechnic Institute of Porto, Vila Nova de Gaia, Portugal
| | - Neide Vieira
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, Braga, Portugal
| | - Sónia Barbosa
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, Braga, Portugal
| | - Thierry Delaveau
- Sorbonne Universités, Université Pierre et Marie Curie, UMR7238, Laboratoire de Biologie computationnelle et quantitative, Paris, France
- CNRS, UMR7238, Laboratoire de Biologie computationnelle et quantitative, Paris, France
| | - Claire Torchet
- CNRS, UMR8226, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, Institut de Biologie Physico-Chimique, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie UPMC, UMR8226, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, Institut de Biologie Physico-Chimique, Paris, France
| | - Agnès Le Saux
- CNRS, FRE3630, Laboratoire de l’Expression Génétique Microbienne, Institut de Biologie Physico-Chimique, Paris, France
| | - Mathilde Garcia
- Sorbonne Universités, Université Pierre et Marie Curie, UMR7238, Laboratoire de Biologie computationnelle et quantitative, Paris, France
- CNRS, UMR7238, Laboratoire de Biologie computationnelle et quantitative, Paris, France
| | - Ana Pereira
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, Braga, Portugal
| | - Sophie Lemoine
- École normale supérieure, Institut de Biologie de l’ENS, IBENS, Paris, France
- Inserm, U1024, Paris, France
- CNRS, UMR 8197, Paris, France
| | - Fanny Coulpier
- École normale supérieure, Institut de Biologie de l’ENS, IBENS, Paris, France
- Inserm, U1024, Paris, France
- CNRS, UMR 8197, Paris, France
| | - Xavier Darzacq
- École normale supérieure, Institut de Biologie de l’ENS, IBENS, Paris, France
- Inserm, U1024, Paris, France
- CNRS, UMR 8197, Paris, France
| | - Lionel Benard
- CNRS, UMR8226, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, Institut de Biologie Physico-Chimique, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie UPMC, UMR8226, Laboratoire de Biologie Moléculaire et Cellulaire des Eucaryotes, Institut de Biologie Physico-Chimique, Paris, France
| | - Margarida Casal
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, Braga, Portugal
| | - Frédéric Devaux
- Sorbonne Universités, Université Pierre et Marie Curie, UMR7238, Laboratoire de Biologie computationnelle et quantitative, Paris, France
- CNRS, UMR7238, Laboratoire de Biologie computationnelle et quantitative, Paris, France
| | - Sandra Paiva
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, Braga, Portugal
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Grifone R, Xie X, Bourgeois A, Saquet A, Duprez D, Shi DL. The RNA-binding protein Rbm24 is transiently expressed in myoblasts and is required for myogenic differentiation during vertebrate development. Mech Dev 2014; 134:1-15. [PMID: 25217815 DOI: 10.1016/j.mod.2014.08.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 08/05/2014] [Accepted: 08/22/2014] [Indexed: 12/16/2022]
Abstract
RNA-binding proteins (RBP) contribute to gene regulation through post-transcriptional events. Despite the important roles demonstrated for several RBP in regulating skeletal myogenesis in vitro, very few RBP coding genes have been characterized during skeletal myogenesis in vertebrate embryo. In the present study we report that Rbm24, which encodes the RNA-binding motif protein 24, is required for skeletal muscle differentiation in vivo. We show that Rbm24 transcripts are expressed at all sites of skeletal muscle formation during embryogenesis of different vertebrates, including axial, limb and head muscles. Interestingly, we find that Rbm24 protein starts to accumulate in MyoD-positive myoblasts and is transiently expressed at the onset of muscle cell differentiation. It accumulates in myotomal and limb myogenic cells, but not in Pax3-positive progenitor cells. Rbm24 expression is under the direct regulation by MyoD, as demonstrated by in vivo chromatin immunoprecipitation assay. Using morpholino knockdown approach, we further show that Rbm24 is required for somitic myogenic progenitor cells to differentiate into muscle cells during chick somitic myogenesis. Altogether, these results highlight Rbm24 as a novel key regulator of the myogenic differentiation program during vertebrate development.
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Affiliation(s)
- Raphaëlle Grifone
- Sorbonne Universités, UPMC Univ Paris 06, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France; CNRS, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France
| | - Xin Xie
- Sorbonne Universités, UPMC Univ Paris 06, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France; CNRS, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France
| | - Adeline Bourgeois
- Sorbonne Universités, UPMC Univ Paris 06, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France; CNRS, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France
| | - Audrey Saquet
- Sorbonne Universités, UPMC Univ Paris 06, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France; CNRS, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France
| | - Delphine Duprez
- Sorbonne Universités, UPMC Univ Paris 06, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France; CNRS, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France
| | - De-Li Shi
- Sorbonne Universités, UPMC Univ Paris 06, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France; CNRS, UMR 7622, Laboratory of Developmental Biology, Paris F-75005, France.
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19
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CCHCR1 interacts with EDC4, suggesting its localization in P-bodies. Exp Cell Res 2014; 327:12-23. [DOI: 10.1016/j.yexcr.2014.05.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 05/09/2014] [Accepted: 05/13/2014] [Indexed: 01/17/2023]
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20
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Abstract
Dengue virus (DENV) is an emerging mosquito-borne human pathogen that affects millions of individuals each year by causing severe and potentially fatal syndromes. Despite intense research efforts, no approved vaccine or antiviral therapy is yet available. Overcoming this limitation requires detailed understanding of the intimate relationship between the virus and its host cell, providing the basis to devise optimal prophylactic and therapeutic treatment options. With the advent of novel high-throughput technologies including functional genomics, transcriptomics, proteomics, and lipidomics, new important insights into the DENV replication cycle and the interaction of this virus with its host cell have been obtained. In this chapter, we provide a comprehensive overview on the current status of the DENV research field, covering every step of the viral replication cycle with a particular focus on virus-host cell interaction. We will also review specific chemical inhibitors targeting cellular factors and processes of relevance for the DENV replication cycle and their possible exploitation for the development of next generation antivirals.
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21
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Yu M, Mu H, Niu Z, Chu Z, Zhu H, Hua J. miR-34c enhances mouse spermatogonial stem cells differentiation by targeting Nanos2. J Cell Biochem 2014; 115:232-42. [PMID: 24038201 DOI: 10.1002/jcb.24655] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 08/14/2013] [Indexed: 12/19/2022]
Abstract
miRNAs are expressed in many mammalian cells, acting specific roles in regulating gene expression or mediating special mRNAs cleavage by targeting their 3'-untranslated region (3'UTR). Some miRNAs are essential and important for animal development. However, it is still unclear what the relationship is between miR-34c and mammalian spermatogonial stem cells (SSCs). We found that a conserved microRNA-34c through its target-Nanos2, regulating SSCs' differentiation in mouse. Immunohistochemistry analysis of Nanos2 and miR-34c FISH results revealed the opposite expression trends between them. Seven bioinformatics websites and programs predicted that miR-34c has interaction sites in Nanos2's 3'UTR. Dual-luciferase reporter vector and mutated dual-luciferase reporter vector analysis validated that they are interacted. After transfection miR-34c mimics into mouse SSCs, or miR-34c lentiviral vector in vitro co-cultivation with seminiferous tubules, and Western blot analysis demonstrated that miR-34c over-expression could suppress Nanos2 expression in post-transcription level. Our experiments identified that miR-34c may promote meiosis process by interacting with Nanos2 leading up-regulation of Stra8 in mouse spermatogonial stem cells.
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Affiliation(s)
- Meng Yu
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Key Lab for Animal Biotechnology of Agriculture Ministry of China, Northwest A&F University, Yangling, Shaanxi, 712100, China
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22
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Guévélou E, Huvet A, Galindo-Sánchez CE, Milan M, Quillien V, Daniel JY, Quéré C, Boudry P, Corporeau C. Sex-Specific Regulation of AMP-Activated Protein Kinase (AMPK) in the Pacific Oyster Crassostrea gigas1. Biol Reprod 2013; 89:100. [DOI: 10.1095/biolreprod.113.109728] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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23
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OULHEN NATHALIE, WESSEL GARYM. Retention of exogenous mRNAs selectively in the germ cells of the sea urchin requires only a 5'-cap and a 3'-UTR. Mol Reprod Dev 2013; 80:561-9. [PMID: 23686945 PMCID: PMC4379035 DOI: 10.1002/mrd.22193] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 04/30/2013] [Indexed: 12/26/2022]
Abstract
The abundance of an mRNA in a cell depends on its overall rates of synthesis and decay. RNA stability is an important element in the regulation of gene expression, and is achieved by a variety of processes including specific recruitment of nucleases and RNAi-associated mechanisms. These mechanisms are particularly important in stem cells, which, in many cases, have attenuated transcription. Here we report that exogenous mRNA injected into fertilized eggs of the sea urchin is selectively retained in the small micromeres, which contribute to the germ line in this organism, beginning in blastulae, when compared to adjacent somatic cells. We show that modification of this exogenous RNA using cap analogs and poly-adenosine tail deletions do not affect its selective retention in the small micromeres, but removal of the cap or of the 3'-untranslated region eliminates any selective mRNA retention in the presumptive germ line. Our results illuminate a likely ancient mechanism used by stem cells to prolong the lifespan of RNAs-either through RNA protection or by the absence of basic RNA degradation mechanisms, which are employed by most other cells of an organism.
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Affiliation(s)
- NATHALIE OULHEN
- Department of Molecular and Cell Biology and Biochemistry, Brown University, Providence, Rhode Island
| | - GARY M. WESSEL
- Department of Molecular and Cell Biology and Biochemistry, Brown University, Providence, Rhode Island
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Zerbato M, Holic N, Moniot-Frin S, Ingrao D, Galy A, Perea J. The brown algae Pl.LSU/2 group II intron-encoded protein has functional reverse transcriptase and maturase activities. PLoS One 2013; 8:e58263. [PMID: 23505475 PMCID: PMC3594303 DOI: 10.1371/journal.pone.0058263] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Accepted: 02/01/2013] [Indexed: 01/13/2023] Open
Abstract
Group II introns are self-splicing mobile elements found in prokaryotes and eukaryotic organelles. These introns propagate by homing into precise genomic locations, following assembly of a ribonucleoprotein complex containing the intron-encoded protein (IEP) and the spliced intron RNA. Engineered group II introns are now commonly used tools for targeted genomic modifications in prokaryotes but not in eukaryotes. We speculate that the catalytic activation of currently known group II introns is limited in eukaryotic cells. The brown algae Pylaiella littoralis Pl.LSU/2 group II intron is uniquely capable of in vitro ribozyme activity at physiological level of magnesium but this intron remains poorly characterized. We purified and characterized recombinant Pl.LSU/2 IEP. Unlike most IEPs, Pl.LSU/2 IEP displayed a reverse transcriptase activity without intronic RNA. The Pl.LSU/2 intron could be engineered to splice accurately in Saccharomyces cerevisiae and splicing efficiency was increased by the maturase activity of the IEP. However, spliced transcripts were not expressed. Furthermore, intron splicing was not detected in human cells. While further tool development is needed, these data provide the first functional characterization of the PI.LSU/2 IEP and the first evidence that the Pl.LSU/2 group II intron splicing occurs in vivo in eukaryotes in an IEP-dependent manner.
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Affiliation(s)
- Madeleine Zerbato
- Inserm, U951 Evry, France
- University of Evry Val d’Essonne, UMR S_951, Evry, France
- Genethon, Evry, France
| | - Nathalie Holic
- Inserm, U951 Evry, France
- University of Evry Val d’Essonne, UMR S_951, Evry, France
- Genethon, Evry, France
| | - Sophie Moniot-Frin
- Inserm, U951 Evry, France
- University of Evry Val d’Essonne, UMR S_951, Evry, France
- Genethon, Evry, France
| | - Dina Ingrao
- Inserm, U951 Evry, France
- University of Evry Val d’Essonne, UMR S_951, Evry, France
- Genethon, Evry, France
| | - Anne Galy
- Inserm, U951 Evry, France
- University of Evry Val d’Essonne, UMR S_951, Evry, France
- Genethon, Evry, France
| | - Javier Perea
- Inserm, U951 Evry, France
- University of Evry Val d’Essonne, UMR S_951, Evry, France
- Genethon, Evry, France
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25
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The Bic-C family of developmental translational regulators. Comp Funct Genomics 2012; 2012:141386. [PMID: 22611335 PMCID: PMC3352585 DOI: 10.1155/2012/141386] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Accepted: 02/18/2012] [Indexed: 12/14/2022] Open
Abstract
Regulation of mRNA translation is especially important during cellular and developmental processes. Many evolutionarily conserved proteins act in the context of multiprotein complexes and modulate protein translation both at the spatial and the temporal levels. Among these, Bicaudal C constitutes a family of RNA binding proteins whose founding member was first identified in Drosophila and contains orthologs in vertebrates. We discuss recent advances towards understanding the functions of these proteins in the context of the cellular and developmental biology of many model organisms and their connection to human disease.
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