{"title":"Human POLD1 modulates cell cycle progression and DNA damage repair.","authors":"Jing Song, Ping Hong, Chengeng Liu, Yueqi Zhang, Jinling Wang, Peichang Wang","doi":"10.1186/s12858-015-0044-7","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>The activity of eukaryotic DNA polymerase delta (Pol δ) plays an essential role in genome stability through its effects on DNA replication and repair. The p125 catalytic subunit of Pol δ is encoded by POLD1 gene in human cells. To clarify biological functions of POLD1, we investigated the effects of POLD1 overexpression or downregulation on cell proliferation, cell cycle progression, DNA synthesis and oxidative DNA damage induced by H2O2.</p><p><strong>Methods: </strong>HEK293 cells were transfected with POLD1 expression plasmid or shRNA, cell proliferation, cell cycle progression, and DNA synthesis in HEK293 cells were analyzed.</p><p><strong>Results: </strong>HEK293 cells were transfected with POLD1 expression plasmid or shRNA. POLD1 downregulation by shRNA suppressed cell proliferation, cell cycle progression, and DNA synthesis in HEK293 cells. However, POLD1 overexpression had no significant effects on these processes. Finally, comet assay showed that POLD1 downregulation led to increased DNA damage.</p><p><strong>Conclusions: </strong>Our results suggest that human POLD1 plays important role in the regulation of cell cycle progression and DNA damage repair.</p>","PeriodicalId":9113,"journal":{"name":"BMC Biochemistry","volume":"16 ","pages":"14"},"PeriodicalIF":0.0000,"publicationDate":"2015-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s12858-015-0044-7","citationCount":"31","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"BMC Biochemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1186/s12858-015-0044-7","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Biochemistry, Genetics and Molecular Biology","Score":null,"Total":0}
引用次数: 31
Abstract
Background: The activity of eukaryotic DNA polymerase delta (Pol δ) plays an essential role in genome stability through its effects on DNA replication and repair. The p125 catalytic subunit of Pol δ is encoded by POLD1 gene in human cells. To clarify biological functions of POLD1, we investigated the effects of POLD1 overexpression or downregulation on cell proliferation, cell cycle progression, DNA synthesis and oxidative DNA damage induced by H2O2.
Methods: HEK293 cells were transfected with POLD1 expression plasmid or shRNA, cell proliferation, cell cycle progression, and DNA synthesis in HEK293 cells were analyzed.
Results: HEK293 cells were transfected with POLD1 expression plasmid or shRNA. POLD1 downregulation by shRNA suppressed cell proliferation, cell cycle progression, and DNA synthesis in HEK293 cells. However, POLD1 overexpression had no significant effects on these processes. Finally, comet assay showed that POLD1 downregulation led to increased DNA damage.
Conclusions: Our results suggest that human POLD1 plays important role in the regulation of cell cycle progression and DNA damage repair.
期刊介绍：
BMC Biochemistry is an open access journal publishing original peer-reviewed research articles in all aspects of biochemical processes, including the structure, function and dynamics of metabolic pathways, supramolecular complexes, enzymes, proteins, nucleic acids and small molecular components of organelles, cells and tissues. BMC Biochemistry (ISSN 1471-2091) is indexed/tracked/covered by PubMed, MEDLINE, BIOSIS, CAS, EMBASE, Scopus, Zoological Record, Thomson Reuters (ISI) and Google Scholar.
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