Comprehensive evaluation of coding region point mutations in microsatellite‐unstable colorectal cancer

Abstract Microsatellite instability (MSI) leads to accumulation of an excessive number of mutations in the genome, mostly small insertions and deletions. MSI colorectal cancers (CRCs), however, also contain more point mutations than microsatellite‐stable (MSS) tumors, yet they have not been as compr...

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Main Authors: Johanna Kondelin, Kari Salokas, Lilli Saarinen, Kristian Ovaska, Heli Rauanheimo, Roosa‐Maria Plaketti, Jiri Hamberg, Xiaonan Liu, Leena Yadav, Alexandra E Gylfe, Tatiana Cajuso, Ulrika A Hänninen, Kimmo Palin, Heikki Ristolainen, Riku Katainen, Eevi Kaasinen, Tomas Tanskanen, Mervi Aavikko, Minna Taipale, Jussi Taipale, Laura Renkonen‐Sinisalo, Anna Lepistö, Selja Koskensalo, Jan Böhm, Jukka‐Pekka Mecklin, Halit Ongen, Emmanouil T Dermitzakis, Outi Kilpivaara, Pia Vahteristo, Mikko Turunen, Sampsa Hautaniemi, Sari Tuupanen, Auli Karhu, Niko Välimäki, Markku Varjosalo, Esa Pitkänen, Lauri A Aaltonen
Format: Article
Language:English
Published: Springer Nature 2018-08-01
Series:EMBO Molecular Medicine
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Online Access:https://doi.org/10.15252/emmm.201708552
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author Johanna Kondelin
Kari Salokas
Lilli Saarinen
Kristian Ovaska
Heli Rauanheimo
Roosa‐Maria Plaketti
Jiri Hamberg
Xiaonan Liu
Leena Yadav
Alexandra E Gylfe
Tatiana Cajuso
Ulrika A Hänninen
Kimmo Palin
Heikki Ristolainen
Riku Katainen
Eevi Kaasinen
Tomas Tanskanen
Mervi Aavikko
Minna Taipale
Jussi Taipale
Laura Renkonen‐Sinisalo
Anna Lepistö
Selja Koskensalo
Jan Böhm
Jukka‐Pekka Mecklin
Halit Ongen
Emmanouil T Dermitzakis
Outi Kilpivaara
Pia Vahteristo
Mikko Turunen
Sampsa Hautaniemi
Sari Tuupanen
Auli Karhu
Niko Välimäki
Markku Varjosalo
Esa Pitkänen
Lauri A Aaltonen
author_facet Johanna Kondelin
Kari Salokas
Lilli Saarinen
Kristian Ovaska
Heli Rauanheimo
Roosa‐Maria Plaketti
Jiri Hamberg
Xiaonan Liu
Leena Yadav
Alexandra E Gylfe
Tatiana Cajuso
Ulrika A Hänninen
Kimmo Palin
Heikki Ristolainen
Riku Katainen
Eevi Kaasinen
Tomas Tanskanen
Mervi Aavikko
Minna Taipale
Jussi Taipale
Laura Renkonen‐Sinisalo
Anna Lepistö
Selja Koskensalo
Jan Böhm
Jukka‐Pekka Mecklin
Halit Ongen
Emmanouil T Dermitzakis
Outi Kilpivaara
Pia Vahteristo
Mikko Turunen
Sampsa Hautaniemi
Sari Tuupanen
Auli Karhu
Niko Välimäki
Markku Varjosalo
Esa Pitkänen
Lauri A Aaltonen
author_sort Johanna Kondelin
collection DOAJ
description Abstract Microsatellite instability (MSI) leads to accumulation of an excessive number of mutations in the genome, mostly small insertions and deletions. MSI colorectal cancers (CRCs), however, also contain more point mutations than microsatellite‐stable (MSS) tumors, yet they have not been as comprehensively studied. To identify candidate driver genes affected by point mutations in MSI CRC, we ranked genes based on mutation significance while correcting for replication timing and gene expression utilizing an algorithm, MutSigCV. Somatic point mutation data from the exome kit‐targeted area from 24 exome‐sequenced sporadic MSI CRCs and respective normals, and 12 whole‐genome‐sequenced sporadic MSI CRCs and respective normals were utilized. The top 73 genes were validated in 93 additional MSI CRCs. The MutSigCV ranking identified several well‐established MSI CRC driver genes and provided additional evidence for previously proposed CRC candidate genes as well as shortlisted genes that have to our knowledge not been linked to CRC before. Two genes, SMARCB1 and STK38L, were also functionally scrutinized, providing evidence of a tumorigenic role, for SMARCB1 mutations in particular.
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spelling doaj-art-ef342cd752574cf1b549cf1e60ecdf372025-08-20T03:46:19ZengSpringer NatureEMBO Molecular Medicine1757-46761757-46842018-08-0110912010.15252/emmm.201708552Comprehensive evaluation of coding region point mutations in microsatellite‐unstable colorectal cancerJohanna Kondelin0Kari Salokas1Lilli Saarinen2Kristian Ovaska3Heli Rauanheimo4Roosa‐Maria Plaketti5Jiri Hamberg6Xiaonan Liu7Leena Yadav8Alexandra E Gylfe9Tatiana Cajuso10Ulrika A Hänninen11Kimmo Palin12Heikki Ristolainen13Riku Katainen14Eevi Kaasinen15Tomas Tanskanen16Mervi Aavikko17Minna Taipale18Jussi Taipale19Laura Renkonen‐Sinisalo20Anna Lepistö21Selja Koskensalo22Jan Böhm23Jukka‐Pekka Mecklin24Halit Ongen25Emmanouil T Dermitzakis26Outi Kilpivaara27Pia Vahteristo28Mikko Turunen29Sampsa Hautaniemi30Sari Tuupanen31Auli Karhu32Niko Välimäki33Markku Varjosalo34Esa Pitkänen35Lauri A Aaltonen36Medicum/Department of Medical and Clinical Genetics, University of HelsinkiInstitute of Biotechnology, University of HelsinkiGenome‐Scale Biology Research Program, Research Programs Unit, University of HelsinkiGenome‐Scale Biology Research Program, Research Programs Unit, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiInstitute of Biotechnology, University of HelsinkiInstitute of Biotechnology, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiDivision of Functional Genomics, Department of Medical Biochemistry and Biophysics (MBB), Karolinska InstitutetMedicum/Department of Medical and Clinical Genetics, University of HelsinkiDepartment of Surgery, Helsinki University Central Hospital, Hospital District of Helsinki and UusimaaDepartment of Surgery, Helsinki University Central Hospital, Hospital District of Helsinki and UusimaaThe HUCH Gastrointestinal Clinic, Helsinki University Central HospitalDepartment of Pathology, Jyväskylä Central HospitalDepartment of Surgery, Jyväskylä Central Hospital, University of Eastern FinlandDepartment of Genetic Medicine and Development, University of Geneva Medical SchoolDepartment of Genetic Medicine and Development, University of Geneva Medical SchoolMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiGenome‐Scale Biology Research Program, Research Programs Unit, University of HelsinkiGenome‐Scale Biology Research Program, Research Programs Unit, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiInstitute of Biotechnology, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiMedicum/Department of Medical and Clinical Genetics, University of HelsinkiAbstract Microsatellite instability (MSI) leads to accumulation of an excessive number of mutations in the genome, mostly small insertions and deletions. MSI colorectal cancers (CRCs), however, also contain more point mutations than microsatellite‐stable (MSS) tumors, yet they have not been as comprehensively studied. To identify candidate driver genes affected by point mutations in MSI CRC, we ranked genes based on mutation significance while correcting for replication timing and gene expression utilizing an algorithm, MutSigCV. Somatic point mutation data from the exome kit‐targeted area from 24 exome‐sequenced sporadic MSI CRCs and respective normals, and 12 whole‐genome‐sequenced sporadic MSI CRCs and respective normals were utilized. The top 73 genes were validated in 93 additional MSI CRCs. The MutSigCV ranking identified several well‐established MSI CRC driver genes and provided additional evidence for previously proposed CRC candidate genes as well as shortlisted genes that have to our knowledge not been linked to CRC before. Two genes, SMARCB1 and STK38L, were also functionally scrutinized, providing evidence of a tumorigenic role, for SMARCB1 mutations in particular.https://doi.org/10.15252/emmm.201708552cancer geneticscolorectal cancermicrosatellite instability
spellingShingle Johanna Kondelin
Kari Salokas
Lilli Saarinen
Kristian Ovaska
Heli Rauanheimo
Roosa‐Maria Plaketti
Jiri Hamberg
Xiaonan Liu
Leena Yadav
Alexandra E Gylfe
Tatiana Cajuso
Ulrika A Hänninen
Kimmo Palin
Heikki Ristolainen
Riku Katainen
Eevi Kaasinen
Tomas Tanskanen
Mervi Aavikko
Minna Taipale
Jussi Taipale
Laura Renkonen‐Sinisalo
Anna Lepistö
Selja Koskensalo
Jan Böhm
Jukka‐Pekka Mecklin
Halit Ongen
Emmanouil T Dermitzakis
Outi Kilpivaara
Pia Vahteristo
Mikko Turunen
Sampsa Hautaniemi
Sari Tuupanen
Auli Karhu
Niko Välimäki
Markku Varjosalo
Esa Pitkänen
Lauri A Aaltonen
Comprehensive evaluation of coding region point mutations in microsatellite‐unstable colorectal cancer
EMBO Molecular Medicine
cancer genetics
colorectal cancer
microsatellite instability
title Comprehensive evaluation of coding region point mutations in microsatellite‐unstable colorectal cancer
title_full Comprehensive evaluation of coding region point mutations in microsatellite‐unstable colorectal cancer
title_fullStr Comprehensive evaluation of coding region point mutations in microsatellite‐unstable colorectal cancer
title_full_unstemmed Comprehensive evaluation of coding region point mutations in microsatellite‐unstable colorectal cancer
title_short Comprehensive evaluation of coding region point mutations in microsatellite‐unstable colorectal cancer
title_sort comprehensive evaluation of coding region point mutations in microsatellite unstable colorectal cancer
topic cancer genetics
colorectal cancer
microsatellite instability
url https://doi.org/10.15252/emmm.201708552
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