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Linker region of the BRCA2 protein increases chemoresistance to cisplatin: Screen for the characterization of cancer-associated variants.

机译:BRCA2蛋白的接头区域增加了对顺铂的化学耐药性:筛选与癌症相关的变体的特征。

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摘要

The BRCA2 (Breast Cancer Type 2, early onset) gene and protein are essential for maintaining genomic integrity. Mutations in this gene can contribute to the onset of breast cancer. BRCA1 and BRCA2 sequencing are a fundamental part of the treatment plan for patients with a family tree indicative of a familial breast cancer syndrome. The Helen F. Graham Cancer Center's Ruth Ann Minner High-Risk Family Registry contains vital data on cancer patients, many of whom carry novel variants in the BRCA2 gene. Most of these variants are classified as "variants of unknown significance" and two of them are located in an uncharacterized linker region of the BRCA2 protein. These variants could possibly change the function of the full-length protein and thus predispose a carrier to cancer. The current study used expression plasmids containing both the wild type sequence and a number of variants of unknown significance found in the Breast Cancer Information Core. These were used in a functional assay for BRCA2 performed on expression-positive clones of the T47D cell line. The functional assay consisted of testing the survival capacity of these clones against that of the untransfected T47D cells when treated with varying concentrations of the DNA crosslinker cisplatin. A potential role for the linker region of the BRCA2 protein in resistance to chemotherapeutics is demonstrated in this work.
机译:BRCA2(2型乳腺癌,早发)基因和蛋白质对于维持基因组完整性至关重要。该基因的突变可导致乳腺癌的发作。 BRCA1和BRCA2测序是具有家族性指示家族性乳腺癌综合症的患者的治疗计划的基本组成部分。海伦·格雷厄姆(Helen F.Graham)癌症中心的露丝·安·米纳(Ruth Ann Minner)高风险家庭登记册包含了有关癌症患者的重要数据,其中许多人携带BRCA2基因的新变异。这些变体中的大多数被归类为“重要性不明的变体”,其中两个位于BRCA2蛋白的未表征接头区域中。这些变异可能会改变全长蛋白质的功能,从而使癌症易感。当前的研究使用了表达质粒,该质粒既包含野生型序列,又包含在乳腺癌信息核心中发现的许多未知意义的变体。这些用于BRCA2的功能测定,该测定在T47D细胞系的表达阳性克隆上进行。功能测定包括用不同浓度的DNA交联剂顺铂处理后,测试这些克隆相对于未转染的T47D细胞的存活能力。这项工作证明了BRCA2蛋白的接头区域在对化学疗法的抗性中的潜在作用。

著录项

  • 作者

    Warren, Curtis R.;

  • 作者单位

    University of Delaware.;

  • 授予单位 University of Delaware.;
  • 学科 Biology Molecular.;Biology Genetics.;Biology Cell.
  • 学位 M.S.
  • 年度 2009
  • 页码 83 p.
  • 总页数 83
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 分子遗传学;细胞生物学;遗传学;
  • 关键词

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