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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Recurrent activating <italic>ACVR1</italic> mutations in diffuse intrinsic pontine glioma</title><author><name sortKey="Taylor, Kathryn R" sort="Taylor, Kathryn R" uniqKey="Taylor K" first="Kathryn R" last="Taylor">Kathryn R. Taylor</name><affiliation><nlm:aff id="A1">Institute of Cancer Research, London, UK</nlm:aff></affiliation></author><author><name sortKey="Mackay, Alan" sort="Mackay, Alan" uniqKey="Mackay A" first="Alan" last="Mackay">Alan Mackay</name><affiliation><nlm:aff id="A1">Institute of Cancer Research, London, UK</nlm:aff></affiliation></author><author><name sortKey="Truffaux, Nathalene" sort="Truffaux, Nathalene" uniqKey="Truffaux N" first="Nathalène" last="Truffaux">Nathalène Truffaux</name><affiliation><nlm:aff id="A2">Institut Gustav Roussy, Villejuif, France</nlm:aff></affiliation></author><author><name sortKey="Butterfield, Yaron" sort="Butterfield, Yaron" uniqKey="Butterfield Y" first="Yaron" last="Butterfield">Yaron Butterfield</name><affiliation><nlm:aff id="A3">BC Cancer Agency, Vancouver, Canada</nlm:aff></affiliation></author><author><name sortKey="Morozova, Olena" sort="Morozova, Olena" uniqKey="Morozova O" first="Olena" last="Morozova">Olena Morozova</name><affiliation><nlm:aff id="A4">Howard Hughes Medical Institute, Los Angeles, CA, USA</nlm:aff></affiliation><affiliation><nlm:aff id="A5">University of California, Los Angeles, CA, USA</nlm:aff></affiliation></author><author><name sortKey="Philippe, Cathy" sort="Philippe, Cathy" uniqKey="Philippe C" first="Cathy" last="Philippe">Cathy Philippe</name><affiliation><nlm:aff id="A2">Institut Gustav Roussy, Villejuif, France</nlm:aff></affiliation></author><author><name sortKey="Castel, David" sort="Castel, David" uniqKey="Castel D" first="David" last="Castel">David Castel</name><affiliation><nlm:aff id="A2">Institut Gustav Roussy, Villejuif, France</nlm:aff></affiliation></author><author><name sortKey="Grasso, Catherine S" sort="Grasso, Catherine S" uniqKey="Grasso C" first="Catherine S" last="Grasso">Catherine S. Grasso</name><affiliation><nlm:aff id="A6">Oregon Health and Science University, Portland, OR, USA</nlm:aff></affiliation></author><author><name sortKey="Vinci, Maria" sort="Vinci, Maria" uniqKey="Vinci M" first="Maria" last="Vinci">Maria Vinci</name><affiliation><nlm:aff id="A1">Institute of Cancer Research, London, UK</nlm:aff></affiliation></author><author><name sortKey="Carvalho, Diana" sort="Carvalho, Diana" uniqKey="Carvalho D" first="Diana" last="Carvalho">Diana Carvalho</name><affiliation><nlm:aff id="A1">Institute of Cancer Research, London, UK</nlm:aff></affiliation></author><author><name sortKey="Carcaboso, Angel M" sort="Carcaboso, Angel M" uniqKey="Carcaboso A" first="Angel M" last="Carcaboso">Angel M. Carcaboso</name><affiliation><nlm:aff id="A7">Hospital Sant Joan de Deu, Barcelona, Spain</nlm:aff></affiliation></author><author><name sortKey="De Torres, Carmen" sort="De Torres, Carmen" uniqKey="De Torres C" first="Carmen" last="De Torres">Carmen De Torres</name><affiliation><nlm:aff id="A7">Hospital Sant Joan de Deu, Barcelona, Spain</nlm:aff></affiliation></author><author><name sortKey="Cruz, Ofelia" sort="Cruz, Ofelia" uniqKey="Cruz O" first="Ofelia" last="Cruz">Ofelia Cruz</name><affiliation><nlm:aff id="A7">Hospital Sant Joan de Deu, Barcelona, Spain</nlm:aff></affiliation></author><author><name sortKey="Mora, Jaume" sort="Mora, Jaume" uniqKey="Mora J" first="Jaume" last="Mora">Jaume Mora</name><affiliation><nlm:aff id="A7">Hospital Sant Joan de Deu, Barcelona, Spain</nlm:aff></affiliation></author><author><name sortKey="Entz Werle, Natacha" sort="Entz Werle, Natacha" uniqKey="Entz Werle N" first="Natacha" last="Entz-Werle">Natacha Entz-Werle</name><affiliation><nlm:aff id="A8">Centre Hospitalier Régional et Universitaire Hautepierre, Strasbourg, France</nlm:aff></affiliation></author><author><name sortKey="Ingram, Wendy J" sort="Ingram, Wendy J" uniqKey="Ingram W" first="Wendy J" last="Ingram">Wendy J. Ingram</name><affiliation><nlm:aff id="A9">Queensland Children’s Tumour Bank, Queensland Children’s Medical Research Institute, The University of Queensland, Brisbane, Queensland, Australia</nlm:aff></affiliation></author><author><name sortKey="Monje, Michelle" sort="Monje, Michelle" uniqKey="Monje M" first="Michelle" last="Monje">Michelle Monje</name><affiliation><nlm:aff id="A10">Stanford University School of Medicine, Stanford, CA, USA</nlm:aff></affiliation></author><author><name sortKey="Hargrave, Darren" sort="Hargrave, Darren" uniqKey="Hargrave D" first="Darren" last="Hargrave">Darren Hargrave</name><affiliation><nlm:aff id="A11">Great Ormond Street Hospital, London, UK</nlm:aff></affiliation></author><author><name sortKey="Bullock, Alex N" sort="Bullock, Alex N" uniqKey="Bullock A" first="Alex N" last="Bullock">Alex N. Bullock</name><affiliation><nlm:aff id="A12">Structural Genomics Consortium, University of Oxford, UK</nlm:aff></affiliation></author><author><name sortKey="Puget, Stephanie" sort="Puget, Stephanie" uniqKey="Puget S" first="Stéphanie" last="Puget">Stéphanie Puget</name><affiliation><nlm:aff id="A13">Necker Childrens Hospital, Paris, France</nlm:aff></affiliation></author><author><name sortKey="Yip, Stephen" sort="Yip, Stephen" uniqKey="Yip S" first="Stephen" last="Yip">Stephen Yip</name><affiliation><nlm:aff id="A3">BC Cancer Agency, Vancouver, Canada</nlm:aff></affiliation></author><author><name sortKey="Jones, Chris" sort="Jones, Chris" uniqKey="Jones C" first="Chris" last="Jones">Chris Jones</name><affiliation><nlm:aff id="A1">Institute of Cancer Research, London, UK</nlm:aff></affiliation></author><author><name sortKey="Grill, Jacques" sort="Grill, Jacques" uniqKey="Grill J" first="Jacques" last="Grill">Jacques Grill</name><affiliation><nlm:aff id="A2">Institut Gustav Roussy, Villejuif, France</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">24705252</idno><idno type="pmc">4018681</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4018681</idno><idno type="RBID">PMC:4018681</idno><idno type="doi">10.1038/ng.2925</idno><date when="2014">2014</date><idno type="wicri:Area/Pmc/Corpus">002E34</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">002E34</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Recurrent activating <italic>ACVR1</italic> mutations in diffuse intrinsic pontine glioma</title><author><name sortKey="Taylor, Kathryn R" sort="Taylor, Kathryn R" uniqKey="Taylor K" first="Kathryn R" last="Taylor">Kathryn R. Taylor</name><affiliation><nlm:aff id="A1">Institute of Cancer Research, London, UK</nlm:aff></affiliation></author><author><name sortKey="Mackay, Alan" sort="Mackay, Alan" uniqKey="Mackay A" first="Alan" last="Mackay">Alan Mackay</name><affiliation><nlm:aff id="A1">Institute of Cancer Research, London, UK</nlm:aff></affiliation></author><author><name sortKey="Truffaux, Nathalene" sort="Truffaux, Nathalene" uniqKey="Truffaux N" first="Nathalène" last="Truffaux">Nathalène Truffaux</name><affiliation><nlm:aff id="A2">Institut Gustav Roussy, Villejuif, France</nlm:aff></affiliation></author><author><name sortKey="Butterfield, Yaron" sort="Butterfield, Yaron" uniqKey="Butterfield Y" first="Yaron" last="Butterfield">Yaron Butterfield</name><affiliation><nlm:aff id="A3">BC Cancer Agency, Vancouver, Canada</nlm:aff></affiliation></author><author><name sortKey="Morozova, Olena" sort="Morozova, Olena" uniqKey="Morozova O" first="Olena" last="Morozova">Olena Morozova</name><affiliation><nlm:aff id="A4">Howard Hughes Medical Institute, Los Angeles, CA, USA</nlm:aff></affiliation><affiliation><nlm:aff id="A5">University of California, Los Angeles, CA, USA</nlm:aff></affiliation></author><author><name sortKey="Philippe, Cathy" sort="Philippe, Cathy" uniqKey="Philippe C" first="Cathy" last="Philippe">Cathy Philippe</name><affiliation><nlm:aff id="A2">Institut Gustav Roussy, Villejuif, France</nlm:aff></affiliation></author><author><name sortKey="Castel, David" sort="Castel, David" uniqKey="Castel D" first="David" last="Castel">David Castel</name><affiliation><nlm:aff id="A2">Institut Gustav Roussy, Villejuif, France</nlm:aff></affiliation></author><author><name sortKey="Grasso, Catherine S" sort="Grasso, Catherine S" uniqKey="Grasso C" first="Catherine S" last="Grasso">Catherine S. Grasso</name><affiliation><nlm:aff id="A6">Oregon Health and Science University, Portland, OR, USA</nlm:aff></affiliation></author><author><name sortKey="Vinci, Maria" sort="Vinci, Maria" uniqKey="Vinci M" first="Maria" last="Vinci">Maria Vinci</name><affiliation><nlm:aff id="A1">Institute of Cancer Research, London, UK</nlm:aff></affiliation></author><author><name sortKey="Carvalho, Diana" sort="Carvalho, Diana" uniqKey="Carvalho D" first="Diana" last="Carvalho">Diana Carvalho</name><affiliation><nlm:aff id="A1">Institute of Cancer Research, London, UK</nlm:aff></affiliation></author><author><name sortKey="Carcaboso, Angel M" sort="Carcaboso, Angel M" uniqKey="Carcaboso A" first="Angel M" last="Carcaboso">Angel M. Carcaboso</name><affiliation><nlm:aff id="A7">Hospital Sant Joan de Deu, Barcelona, Spain</nlm:aff></affiliation></author><author><name sortKey="De Torres, Carmen" sort="De Torres, Carmen" uniqKey="De Torres C" first="Carmen" last="De Torres">Carmen De Torres</name><affiliation><nlm:aff id="A7">Hospital Sant Joan de Deu, Barcelona, Spain</nlm:aff></affiliation></author><author><name sortKey="Cruz, Ofelia" sort="Cruz, Ofelia" uniqKey="Cruz O" first="Ofelia" last="Cruz">Ofelia Cruz</name><affiliation><nlm:aff id="A7">Hospital Sant Joan de Deu, Barcelona, Spain</nlm:aff></affiliation></author><author><name sortKey="Mora, Jaume" sort="Mora, Jaume" uniqKey="Mora J" first="Jaume" last="Mora">Jaume Mora</name><affiliation><nlm:aff id="A7">Hospital Sant Joan de Deu, Barcelona, Spain</nlm:aff></affiliation></author><author><name sortKey="Entz Werle, Natacha" sort="Entz Werle, Natacha" uniqKey="Entz Werle N" first="Natacha" last="Entz-Werle">Natacha Entz-Werle</name><affiliation><nlm:aff id="A8">Centre Hospitalier Régional et Universitaire Hautepierre, Strasbourg, France</nlm:aff></affiliation></author><author><name sortKey="Ingram, Wendy J" sort="Ingram, Wendy J" uniqKey="Ingram W" first="Wendy J" last="Ingram">Wendy J. Ingram</name><affiliation><nlm:aff id="A9">Queensland Children’s Tumour Bank, Queensland Children’s Medical Research Institute, The University of Queensland, Brisbane, Queensland, Australia</nlm:aff></affiliation></author><author><name sortKey="Monje, Michelle" sort="Monje, Michelle" uniqKey="Monje M" first="Michelle" last="Monje">Michelle Monje</name><affiliation><nlm:aff id="A10">Stanford University School of Medicine, Stanford, CA, USA</nlm:aff></affiliation></author><author><name sortKey="Hargrave, Darren" sort="Hargrave, Darren" uniqKey="Hargrave D" first="Darren" last="Hargrave">Darren Hargrave</name><affiliation><nlm:aff id="A11">Great Ormond Street Hospital, London, UK</nlm:aff></affiliation></author><author><name sortKey="Bullock, Alex N" sort="Bullock, Alex N" uniqKey="Bullock A" first="Alex N" last="Bullock">Alex N. Bullock</name><affiliation><nlm:aff id="A12">Structural Genomics Consortium, University of Oxford, UK</nlm:aff></affiliation></author><author><name sortKey="Puget, Stephanie" sort="Puget, Stephanie" uniqKey="Puget S" first="Stéphanie" last="Puget">Stéphanie Puget</name><affiliation><nlm:aff id="A13">Necker Childrens Hospital, Paris, France</nlm:aff></affiliation></author><author><name sortKey="Yip, Stephen" sort="Yip, Stephen" uniqKey="Yip S" first="Stephen" last="Yip">Stephen Yip</name><affiliation><nlm:aff id="A3">BC Cancer Agency, Vancouver, Canada</nlm:aff></affiliation></author><author><name sortKey="Jones, Chris" sort="Jones, Chris" uniqKey="Jones C" first="Chris" last="Jones">Chris Jones</name><affiliation><nlm:aff id="A1">Institute of Cancer Research, London, UK</nlm:aff></affiliation></author><author><name sortKey="Grill, Jacques" sort="Grill, Jacques" uniqKey="Grill J" first="Jacques" last="Grill">Jacques Grill</name><affiliation><nlm:aff id="A2">Institut Gustav Roussy, Villejuif, France</nlm:aff></affiliation></author></analytic><series><title level="j">Nature genetics</title><idno type="ISSN">1061-4036</idno><idno type="eISSN">1546-1718</idno><imprint><date when="2014">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Jones, C" uniqKey="Jones C">C Jones</name></author><author><name sortKey="Perryman, L" uniqKey="Perryman L">L Perryman</name></author><author><name sortKey="Hargrave, D" uniqKey="Hargrave D">D Hargrave</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Katagiri, T" uniqKey="Katagiri T">T Katagiri</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Wu, G" uniqKey="Wu G">G Wu</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lewis, Pw" uniqKey="Lewis P">PW Lewis</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Roujeau, T" uniqKey="Roujeau T">T Roujeau</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Schwartzentruber, J" uniqKey="Schwartzentruber J">J Schwartzentruber</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Puget, S" uniqKey="Puget S">S Puget</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Paugh, Bs" uniqKey="Paugh B">BS Paugh</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Forbes, Sa" uniqKey="Forbes S">SA Forbes</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Shore, Em" uniqKey="Shore E">EM Shore</name></author><author><name sortKey="Kaplan, Fs" uniqKey="Kaplan F">FS Kaplan</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Shore, Em" uniqKey="Shore E">EM Shore</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Bocciardi, R" uniqKey="Bocciardi R">R Bocciardi</name></author><author><name sortKey="Bordo, D" uniqKey="Bordo D">D Bordo</name></author><author><name sortKey="Di Duca, M" uniqKey="Di Duca M">M Di Duca</name></author><author><name sortKey="Di Rocco, M" uniqKey="Di Rocco M">M Di Rocco</name></author><author><name sortKey="Ravazzolo, R" uniqKey="Ravazzolo R">R Ravazzolo</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Petrie, Ka" uniqKey="Petrie K">KA Petrie</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Fukuda, T" uniqKey="Fukuda T">T Fukuda</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kaplan, Fs" uniqKey="Kaplan F">FS Kaplan</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Chaikuad, A" uniqKey="Chaikuad A">A Chaikuad</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Yu, Pb" uniqKey="Yu P">PB Yu</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Tumolo, M" uniqKey="Tumolo M">M Tumolo</name></author><author><name sortKey="Moscatelli, A" uniqKey="Moscatelli A">A Moscatelli</name></author><author><name sortKey="Silvestri, G" uniqKey="Silvestri G">G Silvestri</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kan, L" uniqKey="Kan L">L Kan</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Yu, Pb" uniqKey="Yu P">PB Yu</name></author></analytic></biblStruct></listBibl></div1></back></TEI><pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<pmc-dir>properties manuscript</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-journal-id">9216904</journal-id><journal-id journal-id-type="pubmed-jr-id">2419</journal-id><journal-id journal-id-type="nlm-ta">Nat Genet</journal-id><journal-id journal-id-type="iso-abbrev">Nat. Genet.</journal-id><journal-title-group><journal-title>Nature genetics</journal-title></journal-title-group><issn pub-type="ppub">1061-4036</issn><issn pub-type="epub">1546-1718</issn></journal-meta><article-meta><article-id pub-id-type="pmid">24705252</article-id><article-id pub-id-type="pmc">4018681</article-id><article-id pub-id-type="doi">10.1038/ng.2925</article-id><article-id pub-id-type="manuscript">EMS57117</article-id><article-categories><subj-group subj-group-type="heading"><subject>Article</subject></subj-group></article-categories><title-group><article-title>Recurrent activating <italic>ACVR1</italic> mutations in diffuse intrinsic pontine glioma</article-title></title-group><contrib-group><contrib contrib-type="author" equal-contrib="yes"><name><surname>Taylor</surname><given-names>Kathryn R</given-names></name><xref ref-type="aff" rid="A1">1</xref></contrib><contrib contrib-type="author" equal-contrib="yes"><name><surname>Mackay</surname><given-names>Alan</given-names></name><xref ref-type="aff" rid="A1">1</xref></contrib><contrib contrib-type="author"><name><surname>Truffaux</surname><given-names>Nathalène</given-names></name><xref ref-type="aff" rid="A2">2</xref></contrib><contrib contrib-type="author"><name><surname>Butterfield</surname><given-names>Yaron</given-names></name><xref ref-type="aff" rid="A3">3</xref></contrib><contrib contrib-type="author"><name><surname>Morozova</surname><given-names>Olena</given-names></name><xref ref-type="aff" rid="A4">4</xref><xref ref-type="aff" rid="A5">5</xref></contrib><contrib contrib-type="author"><name><surname>Philippe</surname><given-names>Cathy</given-names></name><xref ref-type="aff" rid="A2">2</xref></contrib><contrib contrib-type="author"><name><surname>Castel</surname><given-names>David</given-names></name><xref ref-type="aff" rid="A2">2</xref></contrib><contrib contrib-type="author"><name><surname>Grasso</surname><given-names>Catherine S</given-names></name><xref ref-type="aff" rid="A6">6</xref></contrib><contrib contrib-type="author"><name><surname>Vinci</surname><given-names>Maria</given-names></name><xref ref-type="aff" rid="A1">1</xref></contrib><contrib contrib-type="author"><name><surname>Carvalho</surname><given-names>Diana</given-names></name><xref ref-type="aff" rid="A1">1</xref></contrib><contrib contrib-type="author"><name><surname>Carcaboso</surname><given-names>Angel M</given-names></name><xref ref-type="aff" rid="A7">7</xref></contrib><contrib contrib-type="author"><name><surname>de Torres</surname><given-names>Carmen</given-names></name><xref ref-type="aff" rid="A7">7</xref></contrib><contrib contrib-type="author"><name><surname>Cruz</surname><given-names>Ofelia</given-names></name><xref ref-type="aff" rid="A7">7</xref></contrib><contrib contrib-type="author"><name><surname>Mora</surname><given-names>Jaume</given-names></name><xref ref-type="aff" rid="A7">7</xref></contrib><contrib contrib-type="author"><name><surname>Entz-Werle</surname><given-names>Natacha</given-names></name><xref ref-type="aff" rid="A8">8</xref></contrib><contrib contrib-type="author"><name><surname>Ingram</surname><given-names>Wendy J</given-names></name><xref ref-type="aff" rid="A9">9</xref></contrib><contrib contrib-type="author"><name><surname>Monje</surname><given-names>Michelle</given-names></name><xref ref-type="aff" rid="A10">10</xref></contrib><contrib contrib-type="author"><name><surname>Hargrave</surname><given-names>Darren</given-names></name><xref ref-type="aff" rid="A11">11</xref></contrib><contrib contrib-type="author"><name><surname>Bullock</surname><given-names>Alex N</given-names></name><xref ref-type="aff" rid="A12">12</xref></contrib><contrib contrib-type="author"><name><surname>Puget</surname><given-names>Stéphanie</given-names></name><xref ref-type="aff" rid="A13">13</xref></contrib><contrib contrib-type="author"><name><surname>Yip</surname><given-names>Stephen</given-names></name><xref ref-type="aff" rid="A3">3</xref></contrib><contrib contrib-type="author"><name><surname>Jones</surname><given-names>Chris</given-names></name><xref ref-type="aff" rid="A1">1</xref><xref ref-type="corresp" rid="CR1">*</xref></contrib><contrib contrib-type="author"><name><surname>Grill</surname><given-names>Jacques</given-names></name><xref ref-type="aff" rid="A2">2</xref><xref ref-type="corresp" rid="CR1">*</xref></contrib></contrib-group><aff id="A1"><label>1</label>Institute of Cancer Research, London, UK</aff><aff id="A2"><label>2</label>Institut Gustav Roussy, Villejuif, France</aff><aff id="A3"><label>3</label>BC Cancer Agency, Vancouver, Canada</aff><aff id="A4"><label>4</label>Howard Hughes Medical Institute, Los Angeles, CA, USA</aff><aff id="A5"><label>5</label>University of California, Los Angeles, CA, USA</aff><aff id="A6"><label>6</label>Oregon Health and Science University, Portland, OR, USA</aff><aff id="A7"><label>7</label>Hospital Sant Joan de Deu, Barcelona, Spain</aff><aff id="A8"><label>8</label>Centre Hospitalier Régional et Universitaire Hautepierre, Strasbourg, France</aff><aff id="A9"><label>9</label>Queensland Children’s Tumour Bank, Queensland Children’s Medical Research Institute, The University of Queensland, Brisbane, Queensland, Australia</aff><aff id="A10"><label>10</label>Stanford University School of Medicine, Stanford, CA, USA</aff><aff id="A11"><label>11</label>Great Ormond Street Hospital, London, UK</aff><aff id="A12"><label>12</label>Structural Genomics Consortium, University of Oxford, UK</aff><aff id="A13"><label>13</label>Necker Childrens Hospital, Paris, France</aff><author-notes><fn id="FN1"><p id="P1"><bold>AUTHOR CONTRIBUTIONS:</bold> CJ, JG, DH and SY designed the study. CJ wrote the manuscript. KRT, AM and CJ designed and reviewed experiments and designed and reviewed statistical and bioinformatic analyses. KRT performed experiments. AM performed bioinformatic analyses. NT, DCas, MV and DCar performed sample preparation and performed experiments. YB, OM, CP, CSG and SY performed and reviewed bioinformatic analyses. AMC, CdT, OC, JM, NE-W, WJI, MM, ANB, SP and JG provided and prepared samples and experimental materials. All authors reviewed the manuscript during its preparation.</p></fn><corresp id="CR1"><label>*</label><italic>Correspondence to:</italic> Chris Jones PhD FRCPath, Glioma Team, Divisions of Molecular Pathology and Cancer Therapeutics, The Institute of Cancer Research, Sutton, Surrey, SM2 5NG, UK ; Tel: +44 20 8722 4416 ; <email>chris.jones@icr.ac.uk</email> ; <italic>Correspondence to:</italic> Jacques Grill MD PhD, CNRS UMR 8203 « Vectorology and Anticancer Therapeutics » and Department of Paediatric and Adolescent Oncology, Gustave Roussy Cancer Institute, Paris Sud University, 94805 Villejuif, France ; Tel: +33 142 11 62 09 ; <email>grill@igr.fr</email></corresp></author-notes><pub-date pub-type="nihms-submitted"><day>8</day><month>5</month><year>2014</year></pub-date><pub-date pub-type="epub"><day>06</day><month>4</month><year>2014</year></pub-date><pub-date pub-type="ppub"><month>5</month><year>2014</year></pub-date><pub-date pub-type="pmc-release"><day>01</day><month>11</month><year>2014</year></pub-date><volume>46</volume><issue>5</issue><fpage>457</fpage><lpage>461</lpage><pmc-comment>elocation-id from pubmed: 10.1038/ng.2925</pmc-comment>
<permissions><license><license-p>Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:<uri xlink:type="simple" xlink:href="http://www.nature.com/authors/editorial_policies/license.html#terms">http://www.nature.com/authors/editorial_policies/license.html#terms</uri></license-p></license></permissions><kwd-group><kwd>DIPG</kwd><kwd>ACVR1</kwd><kwd>ALK2</kwd><kwd>Fibrodysplasia ossificans progressiva</kwd><kwd>BMP/TGF-β</kwd></kwd-group></article-meta></front><body><p id="P2">Diffuse intrinsic pontine glioma (DIPG) are highly infiltrative malignant glial neoplasms of the ventral pons, which due to their location within the brain, make them unsuitable for surgical resection and consequently have a universally dismal clinical outcome. The median survival is 9-12 months, with neither chemotherapeutic nor targeted agents showing any substantial survival benefit in clinical trials in children with these tumours<sup><xref rid="R1" ref-type="bibr">1</xref></sup>. We report the identification of recurrent activating mutations in the <italic>ACVR1</italic> gene, which encodes a type I activin receptor serine/threonine kinase, in 21% of DIPG samples. Strikingly, these somatic mutations (R206H, R258G, G328E/V/W, G356D) have not been reported previously in cancer, but are identical to those found in the germline of patients with the congenital childhood developmental disorder fibrodysplasia ossificans progressiva (FOP)<sup><xref rid="R2" ref-type="bibr">2</xref></sup>, and have been shown to constitutively activate the BMP/TGF-β signalling pathway. These mutations represent novel targets for therapeutic intervention in this otherwise incurable disease.</p><p id="P3">Recent high-throughput sequencing approaches have revealed a striking prevalence of K27M mutations in the genes encoding the histone variants H3.3 (<italic>H3F3A</italic>) or H3.1 (<italic>HIST1H3B</italic>) in the childhood brain tumour DIPG<sup><xref rid="R3" ref-type="bibr">3</xref></sup>. This K-to-M substitution confers a trans-dominant ablation of global H3K27 trimethylation, which likely profoundly alters gene expression through de-repression of polycomb repressive complex 2 (PRC2) target genes<sup><xref rid="R4" ref-type="bibr">4</xref></sup>. Despite these advances in our understanding of the distinct biology of these tumours<sup><xref rid="R1" ref-type="bibr">1</xref></sup>, approaches for desperately-needed specific novel therapeutic interventions are not clear, and little has been reported of the additional mutations accompanying these changes.</p><p id="P4">We carried out whole genome sequencing (WGS) on a unique series of 20 pre-treatment biopsy samples of DIPG, for which the patients underwent a safe stereotactic procedure<sup><xref rid="R5" ref-type="bibr">5</xref></sup>, and whole exome sequencing (WES) on a further biopsy case as well as five samples obtained at autopsy (<xref ref-type="supplementary-material" rid="SD1">Supplementary Table 1</xref>). Histone H3 K27M mutations were observed in 23/26 (88%) cases, comprising 15/26 (58%) <italic>H3F3A</italic> and 8/26 (31%) <italic>HIST1H3B</italic> (<xref ref-type="fig" rid="F1">Figure 1a</xref>). These were not found in concert with mutations in the chaperones <italic>ATRX/DAXX</italic> as has been described for supratentorial paediatric glioblastoma (pGBM)<sup><xref rid="R6" ref-type="bibr">6</xref></sup>. There was also an absence of other known glioma-related molecular abnormalities such as <italic>IDH1/2</italic>, <italic>BRAF, FGFR1</italic> mutations and gene fusions. The mutational spectrum of the untreated biopsy cases was not significantly different from the autopsies (<xref ref-type="fig" rid="F1">Figure 1b</xref>), although the treatment-naïve samples had a low overall mutation rate, with a mean of 14.8 somatic single nucleotide variants (SNVs) per sample (range 0-25), significantly lower than observed in the radiation-treated autopsy cases (mean=32.0, range 14-50, p=0.004, t-test). There was a similarly significantly lower overall mutation rate in untreated samples taken at biopsy compared with autopsy cases (mean=0.76 <italic>vs</italic> 1.2 mutations per Mb, p=0.023, t-test).</p><p id="P5">11/26 (42%) DIPGs harboured somatic <italic>TP53</italic> mutations, with a further six cases (23%) shown to have SNVs in <italic>PPM1D</italic>, regulator of p38 mitogen-activated protein kinase (p38-MAPK)-p53 signalling in response to cellular stress, and an additional case with a somatic <italic>ATM</italic> mutation (<xref ref-type="supplementary-material" rid="SD1">Supplementary Figure 1</xref>), revealing non-overlapping targeting of a DNA damage response pathway in 18/26 (69%) DIPG (<xref ref-type="supplementary-material" rid="SD1">Supplementary Figure 2</xref>). We further identified non-overlapping recurrent alterations in the PI3-kinase pathway targeting <italic>PIK3CA, PIK3R1</italic> and <italic>PTEN</italic> through SNVs and microdeletion (<xref ref-type="supplementary-material" rid="SD1">Supplementary Figure 3</xref>), in addition to amplification of <italic>MET</italic> (1/26, 4%) as previously described<sup><xref rid="R7" ref-type="bibr">7</xref>,<xref rid="R8" ref-type="bibr">8</xref></sup>, and truncating mutation of <italic>NF1</italic> (1/26, 4%) (<xref ref-type="fig" rid="F1">Figure 1c</xref>). We also identified novel recurrent somatic mutations in <italic>IGF2R</italic> (2/26, 8%), although these mutations are concurrent with others in the pathway, so their significance is unknown. In total, 12/26 (46%) DIPG cases harboured some form of alteration predicted to activate the RTK/PI3K/MAPK pathways (<xref ref-type="supplementary-material" rid="SD1">Supplementary Figure 4</xref>).</p><p id="P6">Heterozygous somatic coding mutations in the gene <italic>ACVR1</italic>, which encodes the activin A type I receptor ALK2, were observed in 7/26 (27%) cases (<xref ref-type="fig" rid="F1">Figure 1c</xref>). These were restricted to the specific codons 328 (c.983G>T, p.G328V, two cases; c.983G>A, p.G328E, two cases), 258 (c.772C>T, p.R258G, one case), and 356 (c.1067G>A p.G356D), all within the serine/threonine kinase domain; and 206 (c.617G>A, p.R206H, one case), within the glycine-serine (GS)-rich domain. Screening an extended series of 26 DIPG biopsy samples by Sanger sequencing identified further recurrences of these mutations, and an additional variant at position 328 (c.982G>T, p.G328W) (<xref ref-type="supplementary-material" rid="SD1">Supplementary Figure 5</xref>). Overall, we identified 11/52 (21%) DIPG samples to harbour mutation in <italic>ACVR1</italic> at four different codons (<xref ref-type="fig" rid="F2">Figure 2a</xref>). These mutations appear highly specific to DIPG. SNVs in the <italic>ACVR1</italic> coding region are present in the Catalogue of Somatic Mutations in Cancer (COSMIC<sup><xref rid="R9" ref-type="bibr">9</xref></sup>) database at an overall frequency of 20/5965 (0.3%), with no individual tumour type harbouring more than 2% frequency, and no mutations observed at any of the residues described in the present study, suggestive of a ‘passenger’ effect in other cancers.</p><p id="P7"><italic>ACVR1</italic> mutations were found to co-segregate with the less common <italic>HIST1H3B</italic> K27M mutation in the canonical histone H3.1 variant (p<0.0001, Fishers exact test) (<xref ref-type="fig" rid="F2">Figure 2b</xref>), as well as wild-type <italic>TP53</italic> (p=0.0103, Fishers exact test). There was also an association between H3.1 mutation and chromosome 2 gain (on which <italic>ACVR1</italic> is found at 2q24.1, p=0.0009, Fishers exact test). <italic>ACVR1</italic> mutations appear to mark a distinct subset of DIPG patients (<xref ref-type="supplementary-material" rid="SD1">Supplementary Table 2</xref>). There was a marked predominance of females in the <italic>ACVR1</italic> mutant tumour group (1.75:1 <italic>vs</italic> 0.64:1, p=0.05, Fishers exact test) (<xref ref-type="fig" rid="F2">Figure 2c</xref>), as well as a relatively restricted age of onset (<xref ref-type="fig" rid="F2">Figure 2d</xref>), compared to wild-type. Patients whose tumours harboured <italic>ACVR1</italic> mutations also had a longer overall survival (median=14.9 months vs 10.9 months) p=0.05, log-rank test) (<xref ref-type="fig" rid="F2">Figure 2d</xref>), although outcome remained very poor. There were no significant differences in histology between the groups (<xref ref-type="fig" rid="F2">Figure 2e</xref>). WGS biopsy samples exemplifying this genotype with concurrent <italic>ACVR1</italic> and <italic>HIST1H3B</italic> mutations harboured an additional 10-19 somatic SNVs, and 0-9 SVs respectively (<xref ref-type="fig" rid="F2">Figure 2f</xref>).</p><p id="P8">Remarkably, these somatic mutations in <italic>ACVR1</italic> are at identical residues to those described in the germline of patients with autosomal dominant congenital childhood developmental disorder fibrodysplasia ossificans progressiva (FOP, OMIM:135100)<sup><xref rid="R2" ref-type="bibr">2</xref></sup>. This debilitating disease is characterised by heterotopic ossification of soft connective tissue resulting in severe skeletal abnormalities<sup><xref rid="R10" ref-type="bibr">10</xref></sup>. Patients with classical clinical features of FOP carry heterozygous R206H mutations in the glycine and serine residue (GS) activation domain<sup><xref rid="R11" ref-type="bibr">11</xref></sup>, whilst atypical patients with a less severe phenotype have been shown to harbour either R258S<sup><xref rid="R12" ref-type="bibr">12</xref></sup>, G328E/R/W<sup><xref rid="R13" ref-type="bibr">13</xref></sup>, G356D<sup><xref rid="R14" ref-type="bibr">14</xref></sup>, or other heterozygous mutations in the GS and kinase domains<sup><xref rid="R2" ref-type="bibr">2</xref>,<xref rid="R15" ref-type="bibr">15</xref></sup>. This latter series of mutations may be exposed at the interface with the GS domain and abrogate interactions with the negative regulator FKBP12<sup><xref rid="R12" ref-type="bibr">12</xref>,<xref rid="R13" ref-type="bibr">13</xref>,<xref rid="R15" ref-type="bibr">15</xref></sup>. These mutations have been shown to constitutively activate the bone morphogenic protein (BMP)-dependent transforming growth factor (TGF)-β pathway in the absence of ligand binding, as evidenced by increased phosphorylation of Smad1/5/8 <italic>in vitro</italic><sup><xref rid="R14" ref-type="bibr">14</xref>,<xref rid="R16" ref-type="bibr">16</xref></sup>.</p><p id="P9">To investigate the specific role of <italic>ACVR1</italic> mutations in the context of DIPG, we assembled a panel of four DIPG patient-derived primary cultures (and one thalamic paediatric GBM culture harbouring an <italic>H3F3A</italic> K27M mutation), representing two <italic>ACVR1</italic> mutations (R206H and G328V) and three wild-type lines (<xref ref-type="supplementary-material" rid="SD1">Supplementary Table 3</xref>). RNAseq data demonstrated in these models that the mutant allele was expressed in approximately half the reads, also evidenced by Sanger sequencing of cDNA from patient sample NCHP_DIPG011 (<xref ref-type="supplementary-material" rid="SD1">Supplementary Figure 6</xref>). Treatment with the selective ALK2 inhibitor LDN-193189<sup><xref rid="R17" ref-type="bibr">17</xref></sup> resulted in marked inhibition of cell viability in all cells, with GI50 values ranging from 0.86 – 2.1 μM, approximately 10-fold lower than the less potent parent compound dorsomorphin, with a trend towards increased sensitivity in the mutant cultures (p=0.10, F-test) (<xref ref-type="fig" rid="F3">Figure 3a</xref>). Transfection of <italic>ACVR1</italic> wild-type thalamic GBM and DIPG cells (both <italic>H3F3A</italic> K27M) with FLAG-tagged mutations conferred an increased signalling through phospho-Smad 1/5/8, particularly for R206H, and to a lesser extent for G328E (<xref ref-type="fig" rid="F3">Figure 3b</xref>). ACVR1 mutation may only be one mechanism by which this pathway is activated in DIPG, however, as high basal levels of phospho-Smad 1/5/8 were also observed for the <italic>H3F3A</italic> K27M mutant, <italic>ACVR1</italic> wild-type cells used in this study (<xref ref-type="supplementary-material" rid="SD1">Supplementary Figure 7</xref>). This may explain the lack of a more robust genotype-dependent response to the inhibitor, and also expand upon the population of patients which may benefit from targeting the receptor.</p><p id="P10">There are no reports to our knowledge of coincident FOP and DIPG, although the clinical features of both typical and atypical cases of FOP can commonly include neurological symptoms and have been reported in children to include cerebellar and brain stem abnormalities<sup><xref rid="R15" ref-type="bibr">15</xref>,<xref rid="R18" ref-type="bibr">18</xref></sup>, including demyelinated lesions in the pons both of patients and mouse models<sup><xref rid="R19" ref-type="bibr">19</xref></sup>. It will nonetheless be a challenge to identify the mechanism by which the temporal and spatial context of BMP/TGF-β pathway activation confer such differing clinical phenotypes. In experimental models of FOP, <italic>ACVR1</italic> mutations are associated with defects in stem cell maintenance, reprogramming and differentiation, offering links with cancer-related cellular processes. First generation ALK2 inhibitors such as dorsomorphin<sup><xref rid="R20" ref-type="bibr">20</xref></sup> and LDN-193189<sup><xref rid="R17" ref-type="bibr">17</xref></sup> have been shown to downregulate intracellular BMP/TGF-β signalling and reduce heterotypic ossification, opening the tantalising possibility of CNS-penetrant compounds showing a similar potential in a childhood brain tumour otherwise devoid of efficacious treatment options.</p><sec sec-type="methods" id="S1" specific-use="web-only"><title>ONLINE METHODS</title><sec id="S2"><title>Tumour cohort</title><p id="P11">DIPG samples and matched peripheral blood were available from 21 patients who underwent a stereotactic biopsy at the Neurosurgery Department of Necker Sick Children’s Hospital in Paris, France, 20 of whom were subjected to whole genome sequencing. All patients were clinically diagnosed as diffuse intrinsic pontine glioma based on clinical presentation and radiography as part of a multidisciplinary assessment. These patients had diffuse intrinsic tumour centred to the pons and occupying at least 50% of the volume of this structure, and an associated short clinical history of less than 3 months. DNA from an additional 26 biopsy samples were available as a validation cohort. A further five DIPG cases with matched peripheral blood were obtained at autopsy at the Hospital Sant Joan de Déu, Barcelona, Spain, and were sequenced after exome capture using Agilent SureSelect. All patient material was collected after informed consent and subject to local research ethics committee approval. There were 23 girls and 29 boys (1:1.26 ratio). The median age of the patients was 6.6 years and the median overall survival was 11.6 months. A summary of the tumour cohort and clinicopathological information is provided in <xref ref-type="supplementary-material" rid="SD1">Supplementary Table 2</xref>.</p></sec><sec id="S3"><title>Whole genome / exome sequencing</title><p id="P12">Exome capture was carried out on the four autopsy cases using the 50Mb Agilent SureSelect platform (Agilent, Santa Clara, CA, USA), and paired-end-sequenced on an Illumina HiSeq2000 (Illumina, San Diego, CA, USA) with a 100bp read length. Library preparation for the biopsy samples was carried out by the Illumina FastTrack service, and the entire genomes paired-end-sequenced on an Illumina HiSeq2000. The median coverage for the tumour genomes was 37-67× (matched normal genomes 34-41×). Reads were mapped to the hg19 build of the human genome using bwa (<ext-link ext-link-type="uri" xlink:href="http://bio-bwa.sourceforge.net">bio-bwa.sourceforge.net</ext-link>), and PCR duplicates removed with PicardTools 1.5 (<ext-link ext-link-type="uri" xlink:href="http://picard.sourceforge.net">picard.sourceforge.net</ext-link>).</p></sec><sec id="S4"><title>Genome analysis</title><p id="P13">Somatic single nucleotide variants were called using the Illumina Genome Network (IGN) Cancer Normal pipeline version 1.0.2 and the Genome Analysis Tool Kit v2.4-9 (<ext-link ext-link-type="uri" xlink:href="http://www.broadinstitute.org/gatk/">www.broadinstitute.org/gatk/</ext-link>). Structural variants were called using IGN and SV detect (<ext-link ext-link-type="uri" xlink:href="http://svdetect.sourceforge.net">svdetect.sourceforge.net</ext-link>). Variants were annotated using the Ensembl Variant Effect Predictor v71 (<ext-link ext-link-type="uri" xlink:href="http://www.ensembl.org/info/docs/variation">www.ensembl.org/info/docs/variation</ext-link>) incorporating SIFT (<ext-link ext-link-type="uri" xlink:href="http://sift.jcvi.org">sift.jcvi.org</ext-link>) and PolyPhen (<ext-link ext-link-type="uri" xlink:href="http://genetics.bwh.harvard.edu/pph2">genetics.bwh.harvard.edu/pph2</ext-link>) predictions, COSMIC v64 (<ext-link ext-link-type="uri" xlink:href="http://www.sanger.ac.uk/genetics/CGP/cosmic/">www.sanger.ac.uk/genetics/CGP/cosmic/</ext-link>) and dbSNP build 137 (<ext-link ext-link-type="uri" xlink:href="http://www.ncbi.nlm.nih.gov/sites/SNP">www.ncbi.nlm.nih.gov/sites/SNP</ext-link>) annotations. Copy number was obtained by calculating log<sub>2</sub> ratios of tumour/normal coverage binned into exons of known genes, smoothed using circular binary segmentation (<ext-link ext-link-type="uri" xlink:href="http://www.bioconductor.org">www.bioconductor.org</ext-link>) and processed using in-house scripts. Loss of heterozygosity (LOH) was calculated using APOLLOH (<ext-link ext-link-type="uri" xlink:href="http://compbio.bccrc.ca/software/apolloh/">compbio.bccrc.ca/software/apolloh/</ext-link>). Cartoons showing locations of recurrent mutations were produced by the St Jude Washington University Protein Paint tool (<ext-link ext-link-type="uri" xlink:href="http://www.explorepcgp.org">http://www.explorepcgp.org</ext-link>). Statistical analysis was carried out using R3.0.0 (<ext-link ext-link-type="uri" xlink:href="http://www.r-project.org">www.r-project.org</ext-link>). Continuous variables were analysed using Student’s t-test.</p><p id="P14">Count data was compared using a Fisher’s exact test.</p></sec><sec id="S5"><title>Cell culture and drug sensitivity</title><p id="P15">Primary cultures were derived from DIPG patient samples taken at either biopsy or autopsy at multiple centres, representing both <italic>ACVR1</italic> mutant and wild-type, and both <italic>H3F3A</italic> and <italic>HIST1H3B</italic> K27M, in addition to cells from a paediatric glioblastoma specimen arising in the thalamus with an <italic>H3F3A</italic> K27M mutation. A summary of the Cells were grown under adherent stem cell conditions using laminin (Sigma, Poole, UK)-coated flasks in neurobasal medium (Invitrogen, Paisley, UK) supplemented with B-27 (Invitrogen) and growth factors EGF, b-FGF, PDGF-AA and PDGF-BB (all Shenandoah Biotech, Warwick, PA, USA). The ALK2 inhibitors LDN-193189 (Sigma) and dorsomorphin (Abcam, Cambridge, UK) were tested for effects on cell viability in the cells using a highly sensitive luminescent assay measuring cellular ATP levels (CellTiter-Glo™; Promega, Madison, WI, USA). Drug was added in various concentrations and the cells assayed in triplicate after 72 hours. Statistical analysis was carried out using GraphPad Prism 6.0 (GraphPad Software, La Jolla, CA, USA).</p></sec><sec id="S6"><title>Allelic expression of ACVR1</title><p id="P16">SU-DIPG-IV cells were subjected to full transcriptome sequencing as part of the DIPG Preclinical Consortium. Counts of reads aligned to the <italic>ACVR1</italic> coding region in NCBI_36 were analysed for ratio of mutant sequence to wild-type, and visualised in Genome Browse (Golden Helix, Bozeman, MT, USA). NCHP_DIPG011 primary tumour RNA was reverse-transcribed, PCR-amplified, and Sanger sequenced to determine if both mutant and wild-type alleles were expressed (<xref ref-type="supplementary-material" rid="SD1">Supplementary Table 4</xref>).</p></sec><sec id="S7"><title>Overexpression of mutant ACVR1</title><p id="P17"><italic>ACVR1</italic> mutations R206H and G328E were cloned into pcDNA3.1 by site-directed mutagenesis as previously described<sup><xref rid="R16" ref-type="bibr">16</xref></sup> and transfected into primary cells QCTBR059 and SU-DIPG-VI using lipofectamine (Invitrogen), with protein collected after 24 hours using standard procedures. Western blots were carried out for anti-FLAG HRP (#A8592, Sigma; 1:1000 dilution) and phosphorylated Smad1/5/8 (#9511, Cell Signalling; 1:1000) under standard conditions. Relative levels of phosphorylated Smad1/5/8 were measured by Image J software (National Institute of Mental Health, Bethesda, MD, USA).</p></sec><sec id="S8"><title>Statistical analysis</title><p id="P18">Statistical analysis was carried out using GraphPad Prism 6.0 (GraphPad Software, La Jolla, CA, USA) and R 3.0.1 (<ext-link ext-link-type="uri" xlink:href="http://www.r-project.org">www.r-project.org</ext-link>). Comparison between number of coding SNVs and mutation rate in biopsy and autopsy cases was performed by t-test. For analysis of categorical association between patients with <italic>ACVR1</italic> mutations and mutations in <italic>HIST1H3B</italic> or <italic>TP53</italic>, sex and histology, Fishers exact test was used. Differences in survival were analysed by the Kaplan-Meir method and significance determined by the log-rank test. All tests were two-sided and a <italic>p</italic> value of less than 0.05 was considered significant. A sum-of-squares F test was used to assess differences in dose-response curves for <italic>ACVR1</italic> mutant cells <italic>versus</italic> wild-type.</p></sec></sec><sec sec-type="supplementary-material" id="SM"><title>Supplementary Material</title><supplementary-material content-type="local-data" id="SD1"><label>Supplementary Figures 1-7 and Supplementary Tables 2-4</label><media xlink:href="NIHMS57117-supplement-1.pdf" orientation="portrait" xlink:type="simple" id="d37e819" position="anchor"></media></supplementary-material><supplementary-material content-type="local-data" id="SD2"><label>Supplementary Table 1</label><media xlink:href="NIHMS57117-supplement-2.xlsx" orientation="portrait" xlink:type="simple" id="d37e823" position="anchor"></media></supplementary-material></sec></body><back><ack id="S9"><title>ACKNOWLEDGEMENTS</title><p>This study was funded by the Cancer Research UK Genomics Initiative (A14078), and makes use of data generated by the St. Jude Children’s Research Hospital – Washington University Pediatric Cancer Genome Project. We are grateful to the DIPG Preclinical Consortium funded by The Cure Starts Now and The Lyla Nsouli Foundation for RNAseq data. This work is supported by The Stavros Niarchos Foundation, Abbie’s Army, The Lyla Nsouli Foundation, the Royal Marsden Hospital Childrens Department Fund, and Fondo Alicia Pueyo. MM gratefully acknowledges funding by National Institutes of Neurological Disease and Stroke (NINDS grant K08NS070926), Alex’s Lemonade Stand Foundation, McKenna Claire Foundation and the Dylan Jewett Memorial Fund. CP acknowledges funding from the Agence National pour la Recherche. NT, CP and JG acknowledge funding from the charity l’Etoile de Martin, NE-W acknowledges support from Enfants et Santé. AMC acknowledges funding from the Fundación Cientifica de la aecc. WJI acknowledges funding from Children’s Health Foundation Queensland and the Brainchild Foundation. The SGC is a registered charity (number 1097737) that receives funds from AbbVie, Boehringer Ingelheim, the Canada Foundation for Innovation, the Canadian Institutes for Health Research, Genome Canada, GlaxoSmithKline, Janssen, Lilly Canada, the Novartis Research Foundation, the Ontario Ministry of Economic Development and Innovation, Pfizer, Takeda, and the Wellcome Trust [092809/Z/10/Z]. KRT, AM, MV, DC, DH and CJ acknowledge NHS funding to the National Institute of Health Research Biomedical Research Centres.</p></ack><fn-group><fn id="FN2"><p id="P19"><bold>ACCESSION NUMBERS:</bold> Raw data has been submitted to the European Genome-phenome Archive (<ext-link ext-link-type="uri" xlink:href="http://www.ebi.ac.uk/ega/">www.ebi.ac.uk/ega/</ext-link>), accession numbers EGAS00001000524 (whole genome sequencing) and EGAS00001000572 (exomes).</p></fn></fn-group><ref-list><title>REFERENCES</title><ref id="R1"><label>1</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Jones</surname><given-names>C</given-names></name><name><surname>Perryman</surname><given-names>L</given-names></name><name><surname>Hargrave</surname><given-names>D</given-names></name></person-group><article-title>Paediatric and adult malignant glioma: close relatives or distant cousins?</article-title><source>Nat Rev Clin 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(b) The mutational spectrum of DIPG. Barchart showing total somatic coding variants (black), coding SNVs (grey) and InDels (orange), amplifications (red), deletions (blue) and SVs (purple) for each DIPG case. Number of events are plotted along the z axis. Biopsy cases are marked by the dark brown bar, autopsy cases by light brown. (c) Summary of major alterations found. Clinicopathological information of the 26 DIPG samples are provided along with mutation rate and number of somatic coding SNVs. Mutations, amplifications and deletions are noted for the histone H3 genes and <italic>ATRX/DAXX</italic>; <italic>ACVR1</italic>; <italic>ATM</italic>/<italic>TP53</italic>/<italic>PPM1D</italic> axis; members of the PI3K/MAPK signalling pathways; receptor tyrosine kinases; members of RB pathway, chromosome 1q and 2 single copy gains, and amplification of <italic>MYC</italic>/<italic>MYCN</italic>.</p></caption><graphic xlink:href="emss-57117-f0001"></graphic></fig><fig id="F2" orientation="portrait" position="float"><label>Figure 2</label><caption><title>Recurrent ACVR1 mutations in DIPG</title><p>(a) Cartoon showing recurrent missense mutations in <italic>ACVR1</italic>, overlaid with functional protein domains and exon boundaries. In total, 11/52 (21%) of DIPG harboured somatic mutations at four residues, all of which have been previously described in the germline of patients with fibrodysplasia ossificans progressiva. The specific base changes which may be unique to DIPG are highlighted in italics. Activin: activin types I and II receptor domain; GS: TGF-β glycine-serine rich domain; PKc: protein kinase catalytic domain; PKc_like: protein kinase catalytic domain-like. (b) Bar graphs showing segregation of activating mutations in <italic>ACVR1</italic> with <italic>HIST1H3B</italic> K27M mutations (p<0.0001, Fishers exact test) and wild-type <italic>TP53</italic> (p=0.0103, Fishers exact test) in our extended series of 52 DIPG patients. (c) Sex distribution of patients with <italic>ACVR1</italic> mutations, showing a strong predominance of females in mutant samples. (d) Age distribution (left) and overall survival (right) of DIPG patients with <italic>ACVR1</italic> mutations (purple), compared with wild-type (grey). (e) Barplot representing histological breakdown of <italic>ACVR1</italic> mutant and wild-type samples. GBM: glioblastoma multiforme; AA: anaplastic astrocytoma; AOA: anaplastic oligoastrocytoma; LGA: low grade astrocytoma. Brown=WHO grade 4, orange=grade 3, tan=grade 2. (f) Circos plots representing the whole genome sequences of the four cases of concurrent <italic>ACVR1</italic> mutant / <italic>HIST1H3B</italic> K27M mutant / <italic>TP53</italic> wild-type DIPGs. Outer ring contains chromosomal ideograms, annotated for somatic SNVs in coding genes. Inner ring plots copy number derived from coverage data, dark red=amplification, pink=gain, dark blue=deletion, light blue=loss. Innermost ring represents loss of heterozygosity (LOH, yellow). Inside the circle are drawn SVs, red=interchromosomal translocations, blue=intrachromosomal translocations, orange=deletion, purple=inversion.</p></caption><graphic xlink:href="emss-57117-f0002"></graphic></fig><fig id="F3" orientation="portrait" position="float"><label>Figure 3</label><caption><title>ACVR1 mutations are weakly activating and responsive to targeted inhibition</title><p>(a) In vitro cytotoxicity of the ALK2 inhibitor LDN-193189. Primary cultures were treated with inhibitor for 72 hours and cell viability measured by CellTiter Glo. The cells used were HSJD-DIPG007 (DIPG, <italic>ACVR1</italic> R206H, <italic>H3F3A</italic> K27M), SUDIPG-IV (DIPG, <italic>ACVR1</italic> G328V, <italic>HIST1H3B</italic> K27M), CHRU-TC68 (DIPG, <italic>ACVR1</italic> wt, <italic>H3F3A</italic> K27M), SU-DIPG-VI (DIPG, <italic>ACVR1</italic> wt, <italic>H3F3A</italic> K27M), QCTB-R059 (thalamic paediatric GBM, <italic>ACVR1</italic> wt, <italic>H3F3A</italic> K27M). (b) <italic>ACVR1</italic> mutations confer increased signalling through phospho-Smad 1/5/8. QCTB-R059 and SU-DIPG-VI cells were transfected with FLAG-tagged <italic>ACVR1</italic> R206H and G328E mutations, and assessed for phospho-Smad 1/5/8 by Western blot. EV: empty vector; wt: wild-type ACVR1. α-tubulin is included as a loading control. Figures are given for phospho-Smad 1/5/8 levels quantitated relative to FLAG expression.</p></caption><graphic xlink:href="emss-57117-f0003"></graphic></fig></floats-group></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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