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Padella A, Simonetti G, Paciello G, Giotopoulos G, Baldazzi C, Righi S, Ghetti M, Stengel A, Guadagnuolo V, De Tommaso R, Papayannidis C, Robustelli V, Franchini E, Ghelli Luserna di Rorà A, Ferrari A, Fontana MC, Bruno S, Ottaviani E, Soverini S, Storlazzi CT, Haferlach C, Sabattini E, Testoni N, Iacobucci I, Huntly BJP, Ficarra E, Martinelli G. Novel and Rare Fusion Transcripts Involving Transcription Factors and Tumor Suppressor Genes in Acute Myeloid Leukemia. Cancers (Basel) 2019; 11:E1951. [PMID: 31817495 PMCID: PMC6966504 DOI: 10.3390/cancers11121951] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/15/2019] [Accepted: 12/02/2019] [Indexed: 02/07/2023] Open
Abstract
Approximately 18% of acute myeloid leukemia (AML) cases express a fusion transcript. However, few fusions are recurrent across AML and the identification of these rare chimeras is of interest to characterize AML patients. Here, we studied the transcriptome of 8 adult AML patients with poorly described chromosomal translocation(s), with the aim of identifying novel and rare fusion transcripts. We integrated RNA-sequencing data with multiple approaches including computational analysis, Sanger sequencing, fluorescence in situ hybridization and in vitro studies to assess the oncogenic potential of the ZEB2-BCL11B chimera. We detected 7 different fusions with partner genes involving transcription factors (OAZ-MAFK, ZEB2-BCL11B), tumor suppressors (SAV1-GYPB, PUF60-TYW1, CNOT2-WT1) and rearrangements associated with the loss of NF1 (CPD-PXT1, UTP6-CRLF3). Notably, ZEB2-BCL11B rearrangements co-occurred with FLT3 mutations and were associated with a poorly differentiated or mixed phenotype leukemia. Although the fusion alone did not transform murine c-Kit+ bone marrow cells, 45.4% of 14q32 non-rearranged AML cases were also BCL11B-positive, suggesting a more general and complex mechanism of leukemogenesis associated with BCL11B expression. Overall, by combining different approaches, we described rare fusion events contributing to the complexity of AML and we linked the expression of some chimeras to genomic alterations hitting known genes in AML.
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Affiliation(s)
- Antonella Padella
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | - Giorgia Simonetti
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 Meldola (FC), Italy; (G.S.); (M.G.); (E.F.); (A.G.L.d.R.); (A.F.)
| | - Giulia Paciello
- Department of Control and Computer Engineering DAUIN, Politecnico di Torino, 10129 Turin, Italy; (G.P.); (E.F.)
| | - George Giotopoulos
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge CB2 1TN, UK; (G.G.); (B.J.P.H.)
- Department of Haematology, Cambridge Institute for Medical Research and Addenbrooke’s Hospital, University of Cambridge, Cambridge CB2 0XY, UK
| | - Carmen Baldazzi
- Institute of Hematology “L. and A. Seràgnoli”, Sant’Orsola-Malpighi University Hospital, 40138 Bologna, Italy;
| | - Simona Righi
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | - Martina Ghetti
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 Meldola (FC), Italy; (G.S.); (M.G.); (E.F.); (A.G.L.d.R.); (A.F.)
| | - Anna Stengel
- MLL-Munich Leukemia Laboratory, 81377 Munich, Germany; (A.S.); (C.H.)
| | - Viviana Guadagnuolo
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | - Rossella De Tommaso
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | - Cristina Papayannidis
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | - Valentina Robustelli
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | - Eugenia Franchini
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 Meldola (FC), Italy; (G.S.); (M.G.); (E.F.); (A.G.L.d.R.); (A.F.)
| | - Andrea Ghelli Luserna di Rorà
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 Meldola (FC), Italy; (G.S.); (M.G.); (E.F.); (A.G.L.d.R.); (A.F.)
| | - Anna Ferrari
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 Meldola (FC), Italy; (G.S.); (M.G.); (E.F.); (A.G.L.d.R.); (A.F.)
| | - Maria Chiara Fontana
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | - Samantha Bruno
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | - Emanuela Ottaviani
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | - Simona Soverini
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | | | - Claudia Haferlach
- MLL-Munich Leukemia Laboratory, 81377 Munich, Germany; (A.S.); (C.H.)
| | - Elena Sabattini
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | - Nicoletta Testoni
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, 40138 Bologna, Italy; (A.P.); (S.R.); (V.G.); (R.D.T.); (C.P.); (V.R.); (M.C.F.); (S.B.); (E.O.); (S.S.); (E.S.); (N.T.)
| | - Ilaria Iacobucci
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA;
| | - Brian J. P. Huntly
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge CB2 1TN, UK; (G.G.); (B.J.P.H.)
- Department of Haematology, Cambridge Institute for Medical Research and Addenbrooke’s Hospital, University of Cambridge, Cambridge CB2 0XY, UK
| | - Elisa Ficarra
- Department of Control and Computer Engineering DAUIN, Politecnico di Torino, 10129 Turin, Italy; (G.P.); (E.F.)
| | - Giovanni Martinelli
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 Meldola (FC), Italy; (G.S.); (M.G.); (E.F.); (A.G.L.d.R.); (A.F.)
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Shivakumar M, Lee Y, Bang L, Garg T, Sohn KA, Kim D. Identification of epigenetic interactions between miRNA and DNA methylation associated with gene expression as potential prognostic markers in bladder cancer. BMC Med Genomics 2017; 10:30. [PMID: 28589857 PMCID: PMC5461531 DOI: 10.1186/s12920-017-0269-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Background One of the fundamental challenges in cancer is to detect the regulators of gene expression changes during cancer progression. Through transcriptional silencing of critical cancer-related genes, epigenetic change such as DNA methylation plays a crucial role in cancer. In addition, miRNA, another major component of epigenome, is also a regulator at the post-transcriptional levels that modulate transcriptome changes. However, a mechanistic role of synergistic interactions between DNA methylation and miRNA as epigenetic regulators on transcriptomic changes and its association with clinical outcomes such as survival have remained largely unexplored in cancer. Methods In this study, we propose an integrative framework to identify epigenetic interactions between methylation and miRNA associated with transcriptomic changes. To test the utility of the proposed framework, the bladder cancer data set, including DNA methylation, miRNA expression, and gene expression data, from The Cancer Genome Atlas (TCGA) was analyzed for this study. Results First, we found 120 genes associated with interactions between the two epigenomic components. Then, 11 significant epigenetic interactions between miRNA and methylation, which target E2F3, CCND1, UTP6, CDADC1, SLC35E3, METRNL, TPCN2, NACC2, VGLL4, and PTEN, were found to be associated with survival. To this end, exploration of TCGA bladder cancer data identified epigenetic interactions that are associated with survival as potential prognostic markers in bladder cancer. Conclusions Given the importance and prevalence of these interactions of epigenetic events in bladder cancer it is timely to understand further how different epigenetic components interact and influence each other. Electronic supplementary material The online version of this article (doi:10.1186/s12920-017-0269-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Manu Shivakumar
- Biomedical & Translational Informatics Institute, Geisinger Health System, Danville, PA, USA
| | - Younghee Lee
- Department of Biomedical Informatics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Lisa Bang
- Biomedical & Translational Informatics Institute, Geisinger Health System, Danville, PA, USA
| | - Tullika Garg
- Mowad Urology Department, Geisinger Health System, Danville, PA, USA
| | - Kyung-Ah Sohn
- Department of Software and Computer Engineering, Ajou University, Suwon, South Korea.
| | - Dokyoon Kim
- Biomedical & Translational Informatics Institute, Geisinger Health System, Danville, PA, USA. .,The Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, PA, USA.
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Emerging genotype-phenotype relationships in patients with large NF1 deletions. Hum Genet 2017; 136:349-376. [PMID: 28213670 PMCID: PMC5370280 DOI: 10.1007/s00439-017-1766-y] [Citation(s) in RCA: 141] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 02/08/2017] [Indexed: 02/07/2023]
Abstract
The most frequent recurring mutations in neurofibromatosis type 1
(NF1) are large deletions encompassing the NF1
gene and its flanking regions (NF1
microdeletions). The majority of these deletions encompass 1.4-Mb and are associated
with the loss of 14 protein-coding genes and four microRNA genes. Patients with
germline type-1 NF1 microdeletions frequently
exhibit dysmorphic facial features, overgrowth/tall-for-age stature, significant
delay in cognitive development, large hands and feet, hyperflexibility of joints and
muscular hypotonia. Such patients also display significantly more cardiovascular
anomalies as compared with patients without large deletions and often exhibit
increased numbers of subcutaneous, plexiform and spinal neurofibromas as compared
with the general NF1 population. Further, an extremely high burden of internal
neurofibromas, characterised by >3000 ml tumour volume, is encountered
significantly, more frequently, in non-mosaic NF1
microdeletion patients than in NF1 patients lacking such deletions. NF1 microdeletion patients also have an increased risk of
malignant peripheral nerve sheath tumours (MPNSTs); their lifetime MPNST risk is
16–26%, rather higher than that of NF1 patients with intragenic NF1 mutations (8–13%). NF1 microdeletion patients, therefore, represent a high-risk group for
the development of MPNSTs, tumours which are very aggressive and difficult to treat.
Co-deletion of the SUZ12 gene in addition to
NF1 further increases the MPNST risk in
NF1 microdeletion patients. Here, we summarise
current knowledge about genotype–phenotype relationships in NF1 microdeletion patients and discuss the potential role of the genes
located within the NF1 microdeletion interval
whose haploinsufficiency may contribute to the more severe clinical
phenotype.
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Robson A, Owens NDL, Baserga SJ, Khokha MK, Griffin JN. Expression of ribosomopathy genes during Xenopus tropicalis embryogenesis. BMC DEVELOPMENTAL BIOLOGY 2016; 16:38. [PMID: 27784267 PMCID: PMC5081970 DOI: 10.1186/s12861-016-0138-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 10/07/2016] [Indexed: 11/17/2022]
Abstract
Background Because ribosomes are ubiquitously required for protein production, it was long assumed that any inherited defect in ribosome manufacture would be embryonically lethal. However, several human congenital diseases have been found to be associated with mutations in ribosome biogenesis factors. Surprisingly, despite the global requirement for ribosomes, these “ribosomopathies” are characterized by distinct and tissue specific phenotypes. The reasons for such tissue proclivity in ribosomopathies remain mysterious but may include differential expression of ribosome biogenesis factors in distinct tissues. Methods Here we use in situ hybridization of labeled antisense mRNA probes and ultra high temporal resolution RNA-Seq data to examine and compare expression of 13 disease associated ribosome biogenesis factors at six key stages in Xenopus tropicalis development. Results Rather than being ubiquitously expressed during development, mRNAs of all examined ribosome biogenesis factors were highly enriched in specific tissues, including the cranial neural crest and ventral blood islands. Interestingly, expression of ribosome biogenesis factors demonstrates clear differences in timing, transcript number and tissue localization. Conclusion Ribosome biogenesis factor expression is more spatiotemporally regulated during embryonic development than previously expected and correlates closely with many of the common ribosomopathy phenotypes. Our findings provide information on the dynamic use of ribosome production machinery components during development and advance our understanding of their roles in disease. Electronic supplementary material The online version of this article (doi:10.1186/s12861-016-0138-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Andrew Robson
- Program in Vertebrate Developmental Biology, Departments of Pediatrics and Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, CT, 06510, USA
| | - Nick D L Owens
- The Francis Crick Institute, Mill Hill Laboratory, The Ridgeway, London, NW7 1AA, UK
| | - Susan J Baserga
- Departments of Genetics, Molecular Biophysics and Biochemistry, and Therapeutic Radiology, Yale University School of Medicine, New Haven, CT, 06520, USA
| | - Mustafa K Khokha
- Program in Vertebrate Developmental Biology, Departments of Pediatrics and Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, CT, 06510, USA
| | - John N Griffin
- Program in Vertebrate Developmental Biology, Departments of Pediatrics and Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, CT, 06510, USA.
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The relationship between the nucleolus and cancer: Current evidence and emerging paradigms. Semin Cancer Biol 2015; 37-38:36-50. [PMID: 26721423 DOI: 10.1016/j.semcancer.2015.12.004] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/15/2015] [Accepted: 12/19/2015] [Indexed: 12/13/2022]
Abstract
The nucleolus is the most prominent nuclear substructure assigned to produce ribosomes; molecular machines that are responsible for carrying out protein synthesis. To meet the increased demand for proteins during cell growth and proliferation the cell must increase protein synthetic capacity by upregulating ribosome biogenesis. While larger nucleolar size and number have been recognized as hallmark features of many tumor types, recent evidence has suggested that, in addition to overproduction of ribosomes, decreased ribosome biogenesis as well as qualitative changes in this process could also contribute to tumor initiation and cancer progression. Furthermore, the nucleolus has become the focus of intense attention for its involvement in processes that are clearly unrelated to ribosome biogenesis such as sensing and responding to endogenous and exogenous stressors, maintenance of genome stability, regulation of cell-cycle progression, cellular senescence, telomere function, chromatin structure, establishment of nuclear architecture, global regulation of gene expression and biogenesis of multiple ribonucleoprotein particles. The fact that dysregulation of many of these fundamental cellular processes may contribute to the malignant phenotype suggests that normal functioning of the nucleolus safeguards against the development of cancer and indicates its potential as a therapeutic approach. Here we review the recent advances made toward understanding these newly-recognized nucleolar functions and their roles in normal and cancer cells, and discuss possible future research directions.
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Hajjawi OS. Ribonucleic acid (RNA) biosynthesis in human cancer. Cancer Cell Int 2015; 15:22. [PMID: 25717284 PMCID: PMC4339644 DOI: 10.1186/s12935-015-0167-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 01/20/2015] [Indexed: 12/28/2022] Open
Abstract
In many respects, the most remarkable chemical substances within the genome of eukaryotic cells are remarkable proteins which are the critical structural and functional units of living cells. The specifications for everything that goes in the cell are natural digital-to-digital decoding process in an archive sequence by deoxyribonucleic acid (DNA) and an articulate construction by ribonucleic acid (RNA). The products of DNA transcription are long polymers of ribonucleotides rather than deoxyribonucleotides and are termed ribonucleic acids. Certain deoxyribonucleotide sequences, or genes, give rise to transfer RNA (tRNA) and other ribosomal RNA (rRNA) when transcribed. The ribonucleotide sequences fold extensively and rRNA is associated with specific proteins to yield the essential cell components, ribosomes. Transcription of other special sequences yields messenger RNAs (mRNAs) that contain ribonucleotide sequences that will be ultimately translated into new types of amino acid sequences of functional cellular protein molecules. This switch to a different variety of cellular molecular sequences is complex, but each sequence of the three ribonucleotides specifies the insertion of one particular amino acid into the polypeptide chain under production. Whilst mRNA is considered the vehicle by which genetic information is transmitted from the genome and allocated in the appropriate cytoplasmic sites for translation into protein via cap-dependent mechanism, the actual translation depends also on the presence of other so-called household and luxury protein molecules. Recent evidence suggests RNA species are required at initiation, because treatment of cells with antibiotics or drugs that inhibit RNA synthesis cause a decrease in protein synthesis. The rRNA is necessary as a structural constituent of the ribosomes upon which translation takes place, whereas tRNA is necessary as an adaptor in amino acid activation and elongation protein chains to ribosomes. In this article, we review malignant tumor, with stem like properties, and recent technical advances into the phenomenon of micro-particles and micro-vesicles containing cell-free nucleic acids that circulate plasma. New areas of research have been opened into screening tumor telomerase progression, prognosis of aptamers targeting cell surface, monitoring the efficacy of anticancer therapies, oncogenic transformation of host cell, and RNA polymerases role in the cell cycle progression and differentiation.
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Affiliation(s)
- Omar S Hajjawi
- Department of Biology, Arab American University, P. O. Box 240, Jenin, Israeli Occupied Territories of Palestine
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Delprato A, Al Kadri Y, Pérébaskine N, Monfoulet C, Henry Y, Henras AK, Fribourg S. Crucial role of the Rcl1p-Bms1p interaction for yeast pre-ribosomal RNA processing. Nucleic Acids Res 2014; 42:10161-72. [PMID: 25064857 PMCID: PMC4150785 DOI: 10.1093/nar/gku682] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The essential Rcl1p and Bms1p proteins form a complex required for 40S ribosomal subunit maturation. Bms1p is a GTPase and Rcl1p has been proposed to catalyse the endonucleolytic cleavage at site A2 separating the pre-40S and pre-60S maturation pathways. We determined the 2.0 Å crystal structure of Bms1p associated with Rcl1p. We demonstrate that Rcl1p nuclear import depends on Bms1p and that the two proteins are loaded into pre-ribosomes at a similar stage of the maturation pathway and remain present within pre-ribosomes after cleavage at A2. Importantly, GTP binding to Bms1p is not required for the import in the nucleus nor for the incorporation of Rcl1p into pre-ribosomes, but is essential for early pre-rRNA processing. We propose that GTP binding to Bms1p and/or GTP hydrolysis may induce conformational rearrangements within the Bms1p-Rcl1p complex allowing the interaction of Rcl1p with its RNA substrate.
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Affiliation(s)
- Anna Delprato
- Institut Européen de Chimie et Biologie, ARNA laboratory, Université de Bordeaux, F-33607 Pessac, France Institut National de la Santé Et de la Recherche Médicale, INSERM - U869, ARNA laboratory, F-33000 Bordeaux, France
| | - Yasmine Al Kadri
- Equipe labellisée Ligue Contre le Cancer, Centre National de la Recherche Scientifique, Laboratoire de Biologie Moléculaire Eucaryote and Université de Toulouse, UPS, F-31062 Toulouse Cedex 9, France
| | - Natacha Pérébaskine
- Institut Européen de Chimie et Biologie, ARNA laboratory, Université de Bordeaux, F-33607 Pessac, France Institut National de la Santé Et de la Recherche Médicale, INSERM - U869, ARNA laboratory, F-33000 Bordeaux, France
| | - Cécile Monfoulet
- Institut Européen de Chimie et Biologie, ARNA laboratory, Université de Bordeaux, F-33607 Pessac, France Institut National de la Santé Et de la Recherche Médicale, INSERM - U869, ARNA laboratory, F-33000 Bordeaux, France
| | - Yves Henry
- Equipe labellisée Ligue Contre le Cancer, Centre National de la Recherche Scientifique, Laboratoire de Biologie Moléculaire Eucaryote and Université de Toulouse, UPS, F-31062 Toulouse Cedex 9, France
| | - Anthony K Henras
- Equipe labellisée Ligue Contre le Cancer, Centre National de la Recherche Scientifique, Laboratoire de Biologie Moléculaire Eucaryote and Université de Toulouse, UPS, F-31062 Toulouse Cedex 9, France
| | - Sébastien Fribourg
- Institut Européen de Chimie et Biologie, ARNA laboratory, Université de Bordeaux, F-33607 Pessac, France Institut National de la Santé Et de la Recherche Médicale, INSERM - U869, ARNA laboratory, F-33000 Bordeaux, France
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Sondalle SB, Baserga SJ. Human diseases of the SSU processome. BIOCHIMICA ET BIOPHYSICA ACTA 2014; 1842:758-64. [PMID: 24240090 PMCID: PMC4058823 DOI: 10.1016/j.bbadis.2013.11.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 10/31/2013] [Accepted: 11/05/2013] [Indexed: 12/18/2022]
Abstract
Ribosomes are the cellular machines responsible for protein synthesis. Ribosome biogenesis, the production of ribosomes, is a complex process involving pre-ribosomal RNA (rRNA) cleavages and modifications as well as ribosomal protein assembly around the rRNAs to create the functional ribosome. The small subunit (SSU) processome is a large ribonucleoprotein (RNP) in eukaryotes required for the assembly of the SSU of the ribosome as well as for the maturation of the 18S rRNA. Despite the fundamental nature of the SSU processome to the survival of any eukaryotic cell, mutations in SSU processome components have been implicated in human diseases. Three SSU processome components and their related human diseases will be explored in this review: hUTP4/Cirhin, implicated in North American Indian childhood cirrhosis (NAIC); UTP14, implicated in infertility, ovarian cancer, and scleroderma; and EMG1, implicated in Bowen-Conradi syndrome (BCS). Diseases with suggestive, though inconclusive, evidence for the involvement of the SSU processome in their pathogenesis are also discussed, including a novel putative ribosomopathy. This article is part of a Special Issue entitled: Role of the Nucleolus in Human Disease.
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Affiliation(s)
- Samuel B Sondalle
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Susan J Baserga
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT 06520, USA.
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Quin JE, Devlin JR, Cameron D, Hannan KM, Pearson RB, Hannan RD. Targeting the nucleolus for cancer intervention. Biochim Biophys Acta Mol Basis Dis 2014; 1842:802-16. [PMID: 24389329 DOI: 10.1016/j.bbadis.2013.12.009] [Citation(s) in RCA: 170] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 12/17/2013] [Indexed: 12/17/2022]
Abstract
The contribution of the nucleolus to cancer is well established with respect to its traditional role in facilitating ribosome biogenesis and proliferative capacity. More contemporary studies however, infer that nucleoli contribute a much broader role in malignant transformation. Specifically, extra-ribosomal functions of the nucleolus position it as a central integrator of cellular proliferation and stress signaling, and are emerging as important mechanisms for modulating how oncogenes and tumor suppressors operate in normal and malignant cells. The dependence of certain tumor cells to co-opt nucleolar processes to maintain their cancer phenotypes has now clearly been demonstrated by the application of small molecule inhibitors of RNA Polymerase I to block ribosomal DNA transcription and disrupt nucleolar function (Bywater et al., 2012 [1]). These drugs, which selectively kill tumor cells in vivo while sparing normal cells, have now progressed to clinical trials. It is likely that we have only just begun to scratch the surface of the potential of the nucleolus as a new target for cancer therapy, with "suppression of nucleolar stress" representing an emerging "hallmark" of cancer. This article is part of a Special Issue entitled: Role of the Nucleolus in Human Disease.
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Affiliation(s)
- Jaclyn E Quin
- Oncogenic Signalling and Growth Control Program, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Department of Biochemistry and Molecular Biology, The University of Melbourne, Parkville, Victoria, Australia
| | - Jennifer R Devlin
- Oncogenic Signalling and Growth Control Program, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Department of Biochemistry and Molecular Biology, The University of Melbourne, Parkville, Victoria, Australia
| | - Donald Cameron
- Oncogenic Signalling and Growth Control Program, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
| | - Kate M Hannan
- Oncogenic Signalling and Growth Control Program, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Department of Biochemistry and Molecular Biology, The University of Melbourne, Parkville, Victoria, Australia
| | - Richard B Pearson
- Oncogenic Signalling and Growth Control Program, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Department of Biochemistry and Molecular Biology, The University of Melbourne, Parkville, Victoria, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia
| | - Ross D Hannan
- Oncogenic Signalling and Growth Control Program, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Department of Biochemistry and Molecular Biology, The University of Melbourne, Parkville, Victoria, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia; Department of Pathology, The University of Melbourne, Parkville, Victoria, Australia; School of Biomedical Sciences, The University of Queensland, St Lucia, Queensland, Australia.
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Popov A, Smirnov E, Kováčik L, Raška O, Hagen G, Stixová L, Raška I. Duration of the first steps of the human rRNA processing. Nucleus 2013; 4:134-41. [PMID: 23412654 DOI: 10.4161/nucl.23985] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Processing of rRNA in mammalian cells includes a series of cleavages of the primary 47S transcript and results in producing three rRNAs: 18S, 28S and 5.8S. The sequence of the main processing events in human cells has been established, but little is yet known about the dynamics of this process, especially the dynamics of its early stages. In the present study, we used real-time PCR to measure levels of pre-rRNA after inhibition of transcription with actinomycin D. Thus we could estimate the half-life time of rRNA transcripts in two human-derived cell lines, HeLa and LEP (human embryonic fibroblasts), as well as in mouse NIH 3T3 cells. The primary transcripts seemed to be more stable in the human than in the murine cells. Remarkably, the graphs in all cases showed more or less pronounced lag phase, which may reflect preparatory events preceding the first cleavage of the pre-rRNA. Additionally, we followed the dynamics of the decay of the 5'ETS fragment which is degraded only after the formation of 41S rRNA. According to our estimates, the corresponding three (or four) steps of the processing in human cells take five to eight minutes.
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Affiliation(s)
- Alexey Popov
- First Faculty of Medicine, Institute of Cellular Biology and Pathology, Charles University in Prague, Prague, Czech Republic
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