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- W2117948343 abstract "Background Altered expression of DNA polymerase β (Pol β) has been documented in a large percentage of human tumors. However, tumor prevalence or predisposition resulting from Pol β over-expression has not yet been evaluated in a mouse model. Methodology/Principal Findings We have recently developed a novel transgenic mouse model that over-expresses Pol β. These mice present with an elevated incidence of spontaneous histologic lesions, including cataracts, hyperplasia of Brunner's gland and mucosal hyperplasia in the duodenum. In addition, osteogenic tumors in mice tails, such as osteoma and osteosarcoma were detected. This is the first report of elevated tumor incidence in a mouse model of Pol β over-expression. These findings prompted an evaluation of human gastrointestinal tumors with regard to Pol β expression. We observed elevated expression of Pol β in stomach adenomas and thyroid follicular carcinomas, but reduced Pol β expression in esophageal adenocarcinomas and squamous carcinomas. Conclusions/Significance These data support the hypothesis that balanced and proficient base excision repair protein expression and base excision repair capacity is required for genome stability and protection from hyperplasia and tumor formation." @default.
- W2117948343 created "2016-06-24" @default.
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- W2117948343 date "2009-08-05" @default.
- W2117948343 modified "2023-10-15" @default.
- W2117948343 title "Gastrointestinal Hyperplasia with Altered Expression of DNA Polymerase β" @default.
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- W2117948343 doi "https://doi.org/10.1371/journal.pone.0006493" @default.
- W2117948343 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2716528" @default.
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- W2117948343 hasPublicationYear "2009" @default.
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