PALB2 c.3106G>C (p.Val1036Leu) 在家族癌症环境中,表明潜在的致病性
Philippos Apolinario Costa1, Nicole Hardy2, Patricia LoRusso3
1Medical Oncology and Hematology, Yale School of Medicine, New Haven, Connecticut, USA philippos.costa@yale.edu.
BMJ case reports
|August 1, 2025
概括
一个PALB2基因的生殖系变异与一个女性的卵巢癌和她的兄弟的前列腺癌有关. 分离分析支持其在遗传性癌症综合征中的致病作用.
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:
- 在DNA损伤修复基因中的生殖系变异会增加癌症风险.
- PALB2对于同源重组修复至关重要,其致病变体与乳腺癌,卵巢癌和前列腺癌有关.
- 了解PALB2 c.3106G>C等特定变异的作用对于遗传咨询和风险评估至关重要.
研究的目的:
- 在患有卵巢癌的患者中,研究异合体生殖系PALB2变体 (c.3106G>C,p.Val1036Leu) 的作用.
- 评估确定PALB2变体的家族隔离及其与其他癌症诊断的关联.
- 评估瘤的分子特征,包括失去了异性和修复DNA损伤的基因改变.
主要方法:
- 生殖线DNA测序以识别致病变体.
- 实体瘤分析,包括对异构性损失 (LOH) 评估和DNA损伤修复基因的突变概况.
- 在患者的家庭中进行分离分析,以追踪PALB2变种的遗传.
主要成果:
- 这名被诊断为卵巢癌的患者携带了PALB2 (c.3106G>C,p.Val1036Leu) 中的异合体生殖系变体.
- 瘤分析显示了24.7%的LOH,表明同源复合缺陷,ATR放大,但没有其他致病性DNA损伤修复基因突变.
- 该PALB2 c.3106G>C变种存在于该患者的四个兄弟姐妹中,其中两个患有前列腺癌,一个患有乳腺癌. 患者的父亲患有前列腺癌.
结论:
- 与多种癌症 (卵巢,前列腺,乳腺) 诊断的PALB2 c.3106G>C变异的家族共发生强烈表明其致病作用.
- 这种变体可能会导致遗传性癌症倾向,特别是在同源重组相关的癌症中.
- 需要进一步的研究,以充分描述PALB2 c.3106G>C变种的临床意义和相关风险.
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