ALPL基因变异项目:首批100个重新分类变异的结果
Mariam R Farman1, Theodora Malli2, Catherine Rehder3
1Department of Pediatrics and Adolescent Medicine, Johannes Kepler University Linz, Krankenhausstrasse 26-30, 4020 Linz, Austria.
JBMR plus
|May 19, 2025
概括
通过重新分类具有不确定的意义的100种ALPL基因变异来改善低酸性 (HPP) 诊断. 功能测试澄清了变体的致病性,有助于遗传咨询和更快的HPP诊断.
科学领域:
- 遗传学 遗传学 是一个
- 生物化学 生物化学
- 医学遗传学 医学遗传学
背景情况:
- 低酸盐症 (HPP) 是一种遗传性疾病,影响骨和牙矿化,由性酸酶-肝脏 (ALPL) 基因的变异引起.
- 在ALPL中解释不确定意义的变异 (VUS) 提出了诊断挑战,可能会延迟治疗或导致误诊.
研究的目的:
- 使用更新的标准重新分类100个意义不明的ALPL基因变异 (VUS).
- 通过在体外测试残留酶活性和主导负效应 (DNE) 来评估ALPL变异的功能影响.
主要方法:
- 根据美国医学遗传学院/分子病理学协会调整的标准重新分类100个ALPL VUS.
- 在体外功能测试,包括残留酶活性和主导负效应 (DNE) 评估,对40个选定的变体.
主要成果:
- 100个ALPL VUS被重新分类:73个是致病性/可能致病性,4个是良性/可能良性,23个仍然是VUS.
- 功能测试显示,72%的变体具有<30%的残留活性,与致病性重新分类相关;48%显示DNE.
- 关键领域的变异 (活性部位,同位素接口) 经常表现出活动减少.
结论:
- 对ALPL VUS的重新分类可以提高低度症的诊断准确性.
- 功能数据对于解决VUS和理解变体致病性至关重要.
- 扩展ALPL变异数据库改善了HPP患者的遗传咨询和临床决策.
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