Background
The genetic basis of cancer
Cancer occurs when there is an accumulation of genetic damage that confers a selective advantage on a cell, allowing it to evade normal growth control processes. Uncontrolled growth and reproduction of these damaged cells ultimately results in tumour formation. While some of the key events at the molecular level that are involved in cancer formation are known, there is still much work to be done to identify other genetic changes important in cancer formation that could represent new diagnostic markers or targets for new anti-cancer medicines.
Research
Our aims
The Experimental cancer genetics team's primary interest is in identifying and characterising the genes involved in the development of cancer in the mouse, with a view to extending this knowledge to the understanding of cancer development in man.
Our approach
Our approach is to mimic in the mouse the successive accumulation of genetic alterations (mutations) that are known to occur in the progression of human cancer.
We introduce a series of changes into mouse DNA using a technique called 'insertional mutagenesis'. The word 'mutagenesis' means 'generating mutations', and the 'insertional' part means that we do this by inserting small segments of DNA into the mouse genome. This process is random. The DNA insertion may disrupt a gene and render it non-functional, or it may function to activate gene expression.
This research is known as a forward genetic screen because we do not know in advance which genes will be mutated by the insertional mutagen so essentially we randomly mutate the genome and assess how these mutations influence cancer formation later on as the animal ages. By performing these studies on a large scale we hope to be able to map cancer pathways.
There are several technologies that we use for insertional mutagenesis in the mouse. These are based on using either retroviruses or a mobile genetic element called a 'transposon'. Transposons and viruses target different parts of the genome and therefore mutate different sets of genes. Transposons can be used in a range of tissues, while the use of viruses for insertional mutagenesis is largely restricted to the blood system and mammary gland.
We are particularly interested in studying a tumour suppressor gene called Rassf1a that we have shown to play a role in many different types of cancer, an observation that supports the belief that this gene is an important tumour suppressor gene in humans. We are also interested in cancers of the pancreas, bowel and breast.
While our focus is on the identification and characterisation of genes involved in cancer formation, some of the mouse models we have developed show up problems in areas not related to cancer. At present members of the group are characterising knockout mice that have problems related to infertility, foetal overgrowth and developmental defects.
Internal collaborations
We utilise the Sanger Institute's strengths in DNA sequencing and bioinformatics as part of our work. We also collaborate with the Genome informatics group; the Cancer genome project; the Vertebrate development and genetics group; and with the Mouse genomics group.
External collaborations
Some of these experiments have been performed in collaboration with Anton Bern, Jos Jonkers and Maarten van Lohuizen from the Netherlands Cancer Institute (NKI) in The Netherlands, Lara Collier and David Largaespada from the University of Minnesota, USA, and David Tuveson, Nikki March and Doug Winton at the Cambridge Cancer Research Institute.
Resource development projects
We are currently sequencing the genomes of several key mouse strains as part of the Mouse Genomes Project.
Training and collaboration
The research environment of the group offers opportunities for training and collaboration for individuals with an interest in mouse genetics, bioinformatics and cancer genetics. PhD students and post doctoral research scientists are encouraged to develop independent projects in an active and supportive research environment. PhD training positions are organised by the Sanger Institute PhD programme and candidates interested in post-doctoral and research assistant positions can contact the laboratory directly. Our laboratory has interactions with other groups in the Sanger Institute, in particular Ensembl; Sequencing; Informatics; Mouse genomics; and the Cancer genome project.
Grant support
The work of this team is supported by grants from The Wellcome Trust and Cancer Research UK.
Selected publications
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Deficiency for the ubiquitin ligase UBE3B in a blepharophimosis-ptosis-intellectual-disability syndrome.
American journal of human genetics 2012;91;6;998-1010
PUBMED: 23200864; PMC: 3516591; DOI: 10.1016/j.ajhg.2012.10.011
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Pancreatic cancer genomes reveal aberrations in axon guidance pathway genes.
Nature 2012;491;7424;399-405
PUBMED: 23103869; PMC: 3530898; DOI: 10.1038/nature11547
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The deubiquitinase USP9X suppresses pancreatic ductal adenocarcinoma.
Nature 2012;486;7402;266-70
PUBMED: 22699621; PMC: 3376394; DOI: 10.1038/nature11114
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IFITM3 restricts the morbidity and mortality associated with influenza.
Nature 2012;484;7395;519-23
PUBMED: 22446628; PMC: 3648786; DOI: 10.1038/nature10921
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Disruption of mouse Cenpj, a regulator of centriole biogenesis, phenocopies Seckel syndrome.
PLoS genetics 2012;8;11;e1003022
PUBMED: 23166506; PMC: 3499256; DOI: 10.1371/journal.pgen.1003022
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Insertional mutagenesis identifies multiple networks of cooperating genes driving intestinal tumorigenesis.
Nature genetics 2011;43;12;1202-9
PUBMED: 22057237; PMC: 3233530; DOI: 10.1038/ng.990
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In vivo identification of tumor- suppressive PTEN ceRNAs in an oncogenic BRAF-induced mouse model of melanoma.
Cell 2011;147;2;382-95
PUBMED: 22000016; PMC: 3236086; DOI: 10.1016/j.cell.2011.09.032
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Mouse genomic variation and its effect on phenotypes and gene regulation.
Nature 2011;477;7364;289-94
PUBMED: 21921910; PMC: 3276836; DOI: 10.1038/nature10413
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Sequence-based characterization of structural variation in the mouse genome.
Nature 2011;477;7364;326-9
PUBMED: 21921916; PMC: 3428933; DOI: 10.1038/nature10432
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A role for cohesin in T-cell-receptor rearrangement and thymocyte differentiation.
Nature 2011;476;7361;467-71
PUBMED: 21832993; PMC: 3179485; DOI: 10.1038/nature10312
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Modeling the evolution of ETV6-RUNX1-induced B-cell precursor acute lymphoblastic leukemia in mice.
Blood 2011;118;4;1041-51
PUBMED: 21628403; PMC: 3622520; DOI: 10.1182/blood-2011-02-338848
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Disruption of mouse Slx4, a regulator of structure-specific nucleases, phenocopies Fanconi anemia.
Nature genetics 2011;43;2;147-52
PUBMED: 21240276; PMC: 3624090; DOI: 10.1038/ng.752
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Exome sequencing identifies frequent mutation of the SWI/SNF complex gene PBRM1 in renal carcinoma.
Nature 2011;469;7331;539-42
PUBMED: 21248752; PMC: 3030920; DOI: 10.1038/nature09639
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Rec8-containing cohesin maintains bivalents without turnover during the growing phase of mouse oocytes.
Genes & development 2010;24;22;2505-16
PUBMED: 20971813; PMC: 2975927; DOI: 10.1101/gad.605910
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PARK2 deletions occur frequently in sporadic colorectal cancer and accelerate adenoma development in Apc mutant mice.
Proceedings of the National Academy of Sciences of the United States of America 2010;107;34;15145-50
PUBMED: 20696900; PMC: 2930574; DOI: 10.1073/pnas.1009941107
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Novel candidate cancer genes identified by a large-scale cross-species comparative oncogenomics approach.
Cancer research 2010;70;3;883-95
PUBMED: 20103622; PMC: 2880710; DOI: 10.1158/0008-5472.CAN-09-1737
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Somatic structural rearrangements in genetically engineered mouse mammary tumors.
Genome biology 2010;11;10;R100
PUBMED: 20942901; PMC: 3218656; DOI: 10.1186/gb-2010-11-10-r100
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The IFITM proteins mediate cellular resistance to influenza A H1N1 virus, West Nile virus, and dengue virus.
Cell 2009;139;7;1243-54
PUBMED: 20064371; PMC: 2824905; DOI: 10.1016/j.cell.2009.12.017
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Discovery of candidate disease genes in ENU-induced mouse mutants by large-scale sequencing, including a splice-site mutation in nucleoredoxin.
PLoS genetics 2009;5;12;e1000759
PUBMED: 20011118; PMC: 2782131; DOI: 10.1371/journal.pgen.1000759
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Normal germ line establishment in mice carrying a deletion of the Ifitm/Fragilis gene family cluster.
Molecular and cellular biology 2008;28;15;4688-96
PUBMED: 18505827; PMC: 2493357; DOI: 10.1128/MCB.00272-08
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Loss of Rassf1a cooperates with Apc(Min) to accelerate intestinal tumourigenesis.
Oncogene 2008;27;32;4503-8
PUBMED: 18391979; PMC: 3706934; DOI: 10.1038/onc.2008.94
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Large-scale mutagenesis in p19(ARF)- and p53-deficient mice identifies cancer genes and their collaborative networks.
Cell 2008;133;4;727-41
PUBMED: 18485879; PMC: 2405818; DOI: 10.1016/j.cell.2008.03.021
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The Ras-association domain family (RASSF) members and their role in human tumourigenesis.
Biochimica et biophysica acta 2007;1776;1;58-85
PUBMED: 17692468; PMC: 2586335; DOI: 10.1016/j.bbcan.2007.06.003
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Renin enhancer is critical for control of renin gene expression and cardiovascular function.
The Journal of biological chemistry 2006;281;42;31753-61
PUBMED: 16895910; DOI: 10.1074/jbc.M605720200
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Functional knockout of the matrilin-3 gene causes premature chondrocyte maturation to hypertrophy and increases bone mineral density and osteoarthritis.
The American journal of pathology 2006;169;2;515-27
PUBMED: 16877353; PMC: 1698783; DOI: 10.2353/ajpath.2006.050981
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TranscriptSNPView: a genome-wide catalog of mouse coding variation.
Nature genetics 2006;38;8;853
PUBMED: 16874317; PMC: 2610433; DOI: 10.1038/ng0806-853a
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Geminin is essential to prevent endoreduplication and to form pluripotent cells during mammalian development.
Genes & development 2006;20;14;1880-4
PUBMED: 16847348; PMC: 1522086; DOI: 10.1101/gad.379706
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Loss of TSLC1 causes male infertility due to a defect at the spermatid stage of spermatogenesis.
Molecular and cellular biology 2006;26;9;3595-609
PUBMED: 16611999; PMC: 1447413; DOI: 10.1128/MCB.26.9.3595-3609.2006
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DNA sequence of human chromosome 17 and analysis of rearrangement in the human lineage.
Nature 2006;440;7087;1045-9
PUBMED: 16625196; PMC: 2610434; DOI: 10.1038/nature04689
Team
Team members
Members
- Daniela Robles Espinoza
- PhD Student
Daniela Robles Espinoza
- PhD Student
I graduated with a Bachelor degree in Genome Sciences from the National Autonomous University of Mexico in 2009. I then worked for a year in two research groups focusing in cancer gene discovery and signaling networks, before joining the Sanger Institute as a PhD student.
Research
My PhD project focuses on the identification of novel melanoma susceptibility genes in predisposed families. We utilise whole- and targeted- exome sequencing and bioinformatic tools followed by the biological validation of targets in an effort to understand the genetics underlying this disease.
References
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Jdp2 downregulates Trp53 transcription to promote leukaemogenesis in the context of Trp53 heterozygosity.
Wellcome Trust Sanger Institute, Cambridge, UK.
We performed a genetic screen in mice to identify candidate genes that are associated with leukaemogenesis in the context of Trp53 heterozygosity. To do this we generated Trp53 heterozygous mice carrying the T2/Onc transposon and SB11 transposase alleles to allow transposon-mediated insertional mutagenesis to occur. From the resulting leukaemias/lymphomas that developed in these mice, we identified nine loci that are potentially associated with tumour formation in the context of Trp53 heterozygosity, including AB041803 and the Jun dimerization protein 2 (Jdp2). We show that Jdp2 transcriptionally regulates the Trp53 promoter, via an atypical AP-1 site, and that Jdp2 expression negatively regulates Trp53 expression levels. This study is the first to identify a genetic mechanism for tumour formation in the context of Trp53 heterozygosity.
Funded by: Cancer Research UK; Wellcome Trust
Oncogene 2013;32;3;397-402
PUBMED: 22370638; PMC: 3550594; DOI: 10.1038/onc.2012.56



Dr David Adams