在CAD中双的低形态变体会导致尿素反应性宏细胞性贫血,血红蛋白A2升高
Orna Steinberg-Shemer1,2,3, Joanne Yacobovich1,2,3, Sharon Noy-Lotan2
1Department of Hematology-Oncology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.
British journal of haematology
|November 20, 2023
概括
在CAD基因中的双变异可以导致一种罕见的神经疾病. 本案例研究表明,这些变异也可能导致主要与血液有关的问题,可用尿素治疗.
科学领域:
- 生物化学 生物化学
- 遗传学 是一个遗传学.
- 血液学 血液学 血液学
背景情况:
- 在CAD中双性致病变体 (碳酸合成酶2,酸转碳胺酶和二基酶) 导致婴儿早期脑病变-50.
- 这种疾病的特点是发育迟缓,难治的和贫血,可以用尿素治疗.
- 该CAD基因编码了一个关键的酶在新的pyrimidine生物合成.
研究的目的:
- 为了研究患有宏细胞贫血和轻度发育迟缓的患者的遗传基础.
- 为了确定已识别的CAD变体的功能影响.
- 评估患者对尿素补充剂的反应.
主要方法:
- 下一代测序面板用于遗传分析.
- 血液涂抹分析用于血液学评估.
- 评估CAD酶活性 (隐含) 的功能研究.
主要成果:
- 这位患者出现了宏细胞性贫血,血红蛋白A2升高,无细胞化,聚基细胞化,细胞和轻微的发育迟缓.
- 下一代测序揭示了CAD基因中的双变异.
- 功能性研究表明蛋白质功能低形态 (部分减少),而不是完全废除.
- 患者对尿素补充药物产生了积极反应.
结论:
- 在CAD基因中双的低形变异可以表现为主要的血液学表型.
- 尿素补充可能是患有CAD相关血液学疾病的患者的有效治疗方法.
- 这扩大了已知的CAD缺乏症的临床范围,超出了神经学表现.
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