• AID expression in B-cell lymphomas causes accumulation of genomic uracil and a distinct AID mutational signature 

      Pettersen, Henrik Sahlin; Galashevskaya, Anastasia; Doseth, Berit; Sousa, Mirta; Sarno, Antonio; Visnes, Torkild; Aas, Per Arne; Liabakk, Nina-Beate; Slupphaug, Geir; Sætrom, Pål; Kavli, Bodil Merete; Krokan, Hans Einar (Journal article; Peer reviewed, 2014)
      tThe most common mutations in cancer are C to T transitions, but their origin has remained elusive.Recently, mutational signatures of APOBEC-family cytosine deaminases were identified in many com-mon cancers, suggesting ...
    • An inverse switch in DNA base excision and strand break repair contributes to melphalan resistance in multiple myeloma cells 

      Sousa, Mirta; Zub, Kamila Anna; Aas, Per Arne; Hanssen-Bauer, Audun; Demirovic, Aida; Sarno, Antonio; Tian, Erming; Liabakk, Nina-Beate; Slupphaug, Geir (Journal article; Peer reviewed, 2013)
      Alterations in checkpoint and DNA repair pathways may provide adaptive mechanisms contributing to acquired drug resistance. Here, we investigated the levels of proteins mediating DNA damage signaling and -repair in RPMI8226 ...
    • Generation of a Mouse Model Lacking the Non-Homologous End-Joining Factor Mri/Cyren 

      Castaneda Zegarra, Sergio Miguel; Huse, Camilla; Røsand, Øystein; Sarno, Antonio; Xing, Mengtan; Zhang, Qindong; Alirezaylavasani, Amin; Werner, Julia; Ji, Ping; Liabakk, Nina-Beate; Wang, Wei; Bjørås, Magnar; Oksenych, Valentyn (Journal article; Peer reviewed, 2019)
      Classical non-homologous end joining (NHEJ) is a molecular pathway that detects, processes, and ligates DNA double-strand breaks (DSBs) throughout the cell cycle. Mutations in several NHEJ genes result in neurological ...
    • HDACi Mediate UNG2 Depletion, Dysregulated Genomic Uracil and Altered Expression of Oncoproteins and Tumor Suppressors in B- And T-cell Lines 

      Iveland, Tobias Solli; Hagen, Lars; Sharma, Animesh; Sousa, Mirta; Sarno, Antonio; Kristian Lied, Wollen; Liabakk, Nina-Beate; Slupphaug, Geir (Peer reviewed; Journal article, 2020)
      Background HDAC inhibitors (HDACi) belong to a new group of chemotherapeutics that are increasingly used in the treatment of lymphocyte-derived malignancies, but their mechanisms of action remain poorly understood. Here ...
    • Improved determination of genomic uracil content by high performance liquid chromatography-tandem mass spectrometry 

      Sarno, Antonio (Master thesis, 2011)
      Uracil, a nitrogen base usually found in RNA, may be found in small quantities in genomic DNA. Genomic uracil may arise as a result of deamination of cytosine or misincorporation of deoxyuridine monophosphate (dUMP) instead ...
    • Modulation of cell metabolic pathways and oxidative stress signaling contribute to acquired melphalan resistance in multiple myeloma cells. 

      Zub, Kamila Anna; Sousa, Mirta; Sarno, Antonio; Sharma, Animesh; Demirovic, Aida; Rao, Shalini; Young, Clifford; Aas, Per Arne; Ericsson, Ida; Sundan, Anders; Jensen, Ole Nørregaard; Slupphaug, Geir (Journal article; Peer reviewed, 2015)
      Alkylating agents are widely used chemotherapeutics in the treatment of many cancers, including leukemia, lymphoma, multiple myeloma, sarcoma, lung, breast and ovarian cancer. Melphalan is the most commonly used chemotherapeutic ...
    • MutT homologue 1 (MTH1) catalyzes the hydrolysis of mutagenic O6-methyl-dGTP 

      Jemth, Ann-Sofie; Gustafsson, Robert; Bräutigam, Lars; Henriksson, Linda; Vallin, Karl S.A.; Sarno, Antonio; Almlöf, Ingrid; Homan, Evert; Rasti, Azita; Warpman Berglund, Ulrika; Stenmark, Pål; Helleday, Thomas (Journal article; Peer reviewed, 2018)
      Nucleotides in the free pool are more susceptible to nonenzymatic methylation than those protected in the DNA double helix. Methylated nucleotides like O6-methyl-dGTP can be mutagenic and toxic if incorporated into DNA. ...
    • MutT homologue 1 (MTH1) removes N6-methyl-dATP from the dNTP pool 

      Scaletti, Emma Rose; Vallin, Karl S.A.; Bräutigam, Lars; Sarno, Antonio; Berglund, Ulrika Warpman; Helleday, Thomas; Stenmark, Pål; Jemth, Ann-Sofie (Peer reviewed; Journal article, 2020)
      MutT homologue 1 (MTH1) removes oxidized nucleotides from the nucleotide pool and thereby prevents their incorporation into the genome and thereby reduces genotoxicity. We previously reported that MTH1 is an efficient ...
    • Normal development of mice lacking PAXX, the paralogue of XRCC4 and XLF 

      Gago-Fuentes, Raquel; Xing, Mengtan; Sæterstad, Siri; Sarno, Antonio; Dewan, Alisa Elinsdatter; Beck, Carole; Bradamante, Stefano; Bjørås, Magnar; Oksenych, Valentyn (Journal article; Peer reviewed, 2018)
      DNA repair consists of several cellular pathways which recognize and repair damaged DNA. The classical nonhomologous DNA end-joining (NHEJ) pathway repairs double-strand breaks in DNA. It is required for maturation of both ...
    • RNA metabolism guided by RNA modifications: The role of SMUG1 in rRNA quality control 

      Lirussi, Lisa; Demir, Özlem; You, Panpan; Sarno, Antonio; Amaro, Rommie E.; Nilsen, Hilde (Peer reviewed; Journal article, 2021)
      RNA modifications are essential for proper RNA processing, quality control, and maturation steps. In the last decade, some eukaryotic DNA repair enzymes have been shown to have an ability to recognize and process modified ...
    • Small-molecule inhibitor of OGG1 suppresses proinflammatory gene expression and inflammation 

      Visnes, Torkild; Armando, Cazares-Körner; Wenjing, Hao; Wallner, Olov; Masuyer, Geoffrey; Loseva, Olga; Mortusewicz, Oliver; Wiita, Elisee; Sarno, Antonio; Manoilov, Aleksandr; Astorga-Wells, Juan; Jemth, Ann-Sofie; Pan, Lang; Sanjiv, Kumar; Karsten, Stella; Gokturk, Camilla; Grube, Maurice; Evert J, Homan; Hanna, Bishoy Magdi Fekry; Cynthia, Paulin BJ; pham, Therese; Rasti, Azita; Warpman Berglund, Ulrika; von Nikolai, Catharina; Benitez-Buelga, Carlos; Koolmeister, Tobias; Ivanic, Dag; Iliev, Petar; Scobie, Martin; Krokan, Hans Einar; Baranczewski, Pawel; Artursson, Per; Altun, Mikael; Jenmalm-Jensen, Annika; Kalderen, Christina; Xueqing, Ba; Zubarev, Roman A.; Stenmark, Pål; Boldogh, Istvan; Helleday, Thomas (Journal article; Peer reviewed, 2018)
      The onset of inflammation is associated with reactive oxygen species and oxidative damage to macromolecules like 7,8-dihydro-8-oxoguanine (8-oxoG) in DNA. Because 8-oxoguanine DNA glycosylase 1 (OGG1) binds 8-oxoG and ...
    • Targeting OGG1 arrests cancer cell proliferation by inducing replication stress 

      Visnes, Torkild; Benitez-Buelga, Carlos; Cázares-Körner, Armando; Sanjiv, Kumar; Hanna, Bishoy M F; Mortusewicz, Oliver; Rajagopal, Varshni; Albers, Julian J.; Hagey, Daniel W.; Bekkhus, Tove; Eshtad, Saeed; Baquero, Juan Miguel; Masuyer, Geoffrey; Wallner, Olov; Müller, Sarah; Pham, Therese; Gokturk, Camilla; Rasti, Azita; Suman, Sharda; Torres-Ruiz, Raúl; Sarno, Antonio; Wiita, Elisée; Homan, Evert; Karsten, Stella; Marimuthu, Karthick; Michel, M; Koolmeister, Tobias; Scobie, Martin; Loseva, Olga; Almlöf, Ingrid; Unterlass, Judith Edda; Pettke, Aleksandra; Boström, Johan; Pandey, Monica; Gad, Helge; Herr, Patrick; Jemth, Ann-Sofie; El Andaloussi, Samir; Kalderén, Christina; Rodriguez-Perales, Sandra; Benítez, Javier; Krokan, Hans Einar; Altun, Mikael; Stenmark, Pål; Berglund, Ulrika Warpman; Helleday, Thomas (Peer reviewed; Journal article, 2020)
      Abstract Altered oncogene expression in cancer cells causes loss of redox homeostasis resulting in oxidative DNA damage, e.g. 8-oxoguanine (8-oxoG), repaired by base excision repair (BER). PARP1 coordinates BER and relies ...
    • The contribution of different uracil-DNA glycosylases to removal of uracil from DNA in different mouse organs - the significance of sequence context and proliferative status 

      Choudhury-Bhakta, Romi Roy (Master thesis, 2014)
      Uracil is a non-canonical base in DNA that can arise through misincorporation of dUMP instead of dTMP during replication or from cytosine deamination. Uracil in DNA can be removed by the four different DNA glycosylases ...
    • Uracil Accumulation and Mutagenesis Dominated by Cytosine Deamination in CpG Dinucleotides in Mice Lacking UNG and SMUG 

      Alsøe, Lene; Sarno, Antonio; Carracedo Huroz, Sergio; Domanska, Diana Ewa; Dingler, Felix; Lirussi, Lisa; Sengupta, Tanima; Tekin, Nuriye Basdag; Jobert, Laure; Alexandrov, Ludmil B.; Galashevskaya, Anastasia; Rada, Cristina; Sandve, Geir Kjetil; Rognes, Torbjørn; Krokan, Hans Einar; Nilsen, Hilde Loge (Journal article; Peer reviewed, 2017)
      Both a DNA lesion and an intermediate for antibody maturation, uracil is primarily processed by base excision repair (BER), either initiated by uracil-DNA glycosylase (UNG) or by single-strand selective monofunctional ...
    • Uracil in DNA - necessary intermediate for antibody maturation and mutagenic lesion 

      Sarno, Antonio (Doctoral thesis at NTNU;2015:153, Doctoral thesis, 2015)
      Uracil in DNA - et viktig mellomprodukt for adaptiv immunitet og mutagen skade Uracil er en av fire nukleobaser i RNA, men små mengder kan også befinne seg i DNA. Det er to kilder til genomisk uracil: misinkorporering ...
    • Uracil-DNA glycosylase UNG1 isoform variant supports class switch recombination and repairs nuclear genomic uracil 

      Sarno, Antonio; Lundbæk, Marie Benner; Liabakk, Nina-Beate; Aas, Per Arne; Mjelle, Robin; Hagen, Lars; Sousa, Mirta; Krokan, Hans Einar; Kavli, Bodil Merete (Journal article; Peer reviewed, 2019)
      UNG is the major uracil-DNA glycosylase in mammalian cells and is involved in both error-free base excision repair of genomic uracil and mutagenic uracil-processing at the antibody genes. However, the regulation of UNG in ...
    • UV degradation of natural and synthetic microfibers causes fragmentation and release of polymer degradation products and chemical additives 

      Sørensen, Lisbet; Groven, Anette Synnøve; Hovsbakken, Ingrid Alver; Del Puerto, Oihane; Krause, Daniel Franklin; Sarno, Antonio; Booth, Andy (Peer reviewed; Journal article, 2020)
      A high proportion of the total microplastic (MP) load in the marine environment has been identified as microfibers (MFs), with polyester (PET) and polyamide (PA) typically found in the highest abundance. The potential for ...
    • UV degradation of natural and synthetic microfibers causes fragmentation and release of polymer degradation products and chemical additives 

      Sørensen, Lisbet; Groven, Anette Synnøve; Hovsbakken, Ingrid Alver; Del Puerto, Oihane; Krause, Daniel Franklin; Sarno, Antonio; Booth, Andrew (Peer reviewed; Journal article, 2020)
      A high proportion of the total microplastic (MP) load in the marine environment has been identified as microfibers (MFs), with polyester (PET) and polyamide (PA) typically found in the highest abundance. The potential for ...