一个患有同卵性血红蛋白患者的第一份报告Ernz:证据支持一种非致病性变体
Zohreh Shojaei1, Maryam Abiri2, Fatemeh Zafarghandi Motlagh1
1Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, 41 IRNA St., Vali Asr St., Tehran 1595645513, Iran.
Blood cells, molecules & diseases
|October 12, 2023
概括
血红蛋白Ernz (Hb Ernz),一个不确定的意义的变体,被重新归类为良性. 我们的研究发现了八个病例和第一个同位子,这表明它的血液学影响是最小的,可能是由于同时发生的α-globin突变.
科学领域:
- 血液学 血液学 血液学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 血红蛋白Ernz (Hb Ernz) 是β-环球蛋白基因 (HBB c.371C>A) 中的一个错误变体,其特点是位于123.3位置的Threonine替换为阿斯巴拉丁.
- 目前被ACMG指导方针归类为不确定的意义 (VUS) 的变体,原因是有限的病例报告和缺少同胞细胞数据.
- 边缘性血液学参数的个体经常被查血病,这为识别罕见的血红蛋白变异提供了机会.
研究的目的:
- 为了研究血红蛋白Ernz的临床意义和血液学影响.
- 报告首次发现Hb Ernz. 的同位素基因型.
- 根据新的基因型和表型数据重新评估Hb Ernz的分类.
主要方法:
- 贝塔-环球蛋白基因的DNA测序是在20年来在血病查期间收集的样本上进行的.
- 在具有边界血液学参数的个体中发现了8例Hb Ernz病例.
- 首个同位素变异的Hb Ernz被识别和描述.
主要成果:
- 在20多年里,通过广泛的β-环球蛋白基因测序确定了8例Hb Ernz病例.
- 在这项研究中报告了Hb Ernz的第一个被记录的同位素变体.
- 在Hb Ernz载体中观察到的血液学变化可能归因于同时存在的α-环球蛋白基因突变,而不是Hb Ernz本身.
结论:
- 这些发现支持将血红蛋白Ernz从不确定的意义的变异重新归类为良性变异.
- 在没有其他基因修饰剂的情况下,Hb Ernz似乎对血液学参数的影响最小.
- 这项研究有助于更准确地对血红蛋白变体进行分类,并有助于对血病携带者进行遗传咨询.
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