一种精确的细胞测试,以确定林奇综合征基因中编码和非编码变异的致病性
Iris E Glykofridis1, Marleen Dekker1, Chantal Stoepker1
1Division of Tumor Biology and Immunology, The Netherlands Cancer Institute, Amsterdam 1066 CX, The Netherlands.
林奇综合征的诊断得到了改进,这是一种新的测定方法,可以准确地对DNA不匹配修复基因中含有不确定意义的遗传变异进行分类. 这种功能测试有助于针对受影响家庭进行个性化癌症监测.
科学领域:
- 遗传学 是一个遗传学.
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 林奇综合征 (LS) 是一种与DNA不匹配修复 (MMR) 基因突变相关的遗传性癌症倾向.
- 生殖线测序经常识别出不确定的意义 (VUS) 的变异,使LS诊断和个性化患者管理复杂化.
研究的目的:
- 开发和验证一种高精度的功能性试验,用于确定MMR基因中VUS的致病性.
- 为了提高林奇综合征的诊断准确度,并促进个性化癌症监测.
主要方法:
- 对人类细胞的寡核酸导向突变查 (ODMS) 的调整,称为"coselection ODMS".
- 引入变体进入内源性MMR基因使用复制合基因编辑生理表达.
- 使用已知的致病性/良性变体和患者衍生的VUS.使用测定验证.
主要成果:
- 在分类50种良性和86种致病性MMR基因变异方面,Coselection ODMS实现了100%的准确性.
- 在109个患者衍生的VUS中,51个被归类为对MMR功能有害.
- 该试验在临床诊断环境中显示出100%的一致性,灵敏度>93%和特异性>92%.
结论:
- 可选性ODMS是一种可靠的功能测试,用于诊断神秘的LS变体.
- 这种测试可以进行准确的风险评估,指导林奇综合征家族的个性化监测和治疗策略.
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