Pronounced maternal parent-of-origin bias for type-1 NF1 microdeletions

Pronounced maternal parent-of-origin bias for type-1 NF1 microdeletions
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1 型 NF1 微缺失存在明显的母系亲本偏差

DOI:
10.1007/s00439-018-1888-x
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发表时间:
2018
期刊:
影响因子:
5.3
通讯作者:
Kehrer-Sawatzki H
Kehrer-Sawatzki H
中科院分区:
生物学2区
文献类型:
--
作者:
Neuhäusler L;Summerer A;Cooper DN;Mautner VF;Kehrer-Sawatzki H

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1型神经纤维瘤病(NF 1)是由17q11.2内NF 1基因及其侧翼区域的大缺失引起的,占4.7-11%。不同类型的大NF 1缺失的发生是由它们的断点位置和潜在的突变机制区分。最常见的是1.4 Mb的1 NF 1型缺失,其表现出由非等位基因同源重组(NAHR)(也称为不等交换)引起的复发性断点。在这里,我们分析了37个不相关的家庭与从头型1 NF 1缺失的患者通过短串联重复序列(STR)分析,以确定删除的父母起源。我们观察到37例1型缺失中有33例是母亲起源的(89.2%的病例;p< 0.0001)。对患者同胞的分析表明,在14例有信息的病例中,有10例(71.4%)缺失是由于减数分裂Ⅰ期间染色体间的不等交换所致。我们的研究结果表明,一个强大的母体父母的原产地的偏见为1 NF 1型缺失。类似的明显的母体传递偏差已被报道为与自闭症相关的16p11.2内的复发性拷贝数变异(CNVs),但到目前为止还没有任何其他NAHR介导的致病性CNVs。区域特异性基因组特征可能是导致16p11.2 CNVs和1 NF 1型缺失起源的母体偏倚的原因。
Neurofibromatosis type 1 (NF1) is caused, in 4.7–11% of cases, by large deletions encompassing theNF1gene and its flanking regions within 17q11.2. Different types of largeNF1deletion occur which are distinguishable by their breakpoint location and underlying mutational mechanism. Most common are the type-1NF1deletions of 1.4 Mb which exhibit recurrent breakpoints caused by nonallelic homologous recombination (NAHR), also termed unequal crossover. Here, we analyzed 37 unrelated families of patients with de novo type-1NF1deletions by means of short tandem repeat (STR) profiling to determine the parental origin of the deletions. We observed that 33 of the 37 type-1 deletions were of maternal origin (89.2% of cases;p< 0.0001). Analysis of the patients’ siblings indicated that, in 14 informative cases, ten (71.4%) deletions resulted from interchromosomal unequal crossover during meiosis I. Our findings indicate a strong maternal parent-of-origin bias for type-1NF1deletions. A similarly pronounced maternal transmission bias has been reported for recurrent copy number variants (CNVs) within 16p11.2 associated with autism, but not so far for any other NAHR-mediated pathogenic CNVs. Region-specific genomic features are likely to be responsible for the maternal bias in the origin of both the 16p11.2 CNVs and type-1NF1deletions.
DOI: 10.1016/j.tig.2015.05.010
发表时间: 2015-10
期刊: Trends in genetics : TIG
影响因子: --
作者:
Weckselblatt B;Rudd MK
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发表时间: 2017-12-01
期刊: HUMAN MUTATION
影响因子: 3.9
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2 型 NF1 缺失非常不寻常,因为不存在非等位基因同源重组热点并且明显偏好雌性有丝分裂重组。
DOI: --
发表时间: 2007
影响因子: 9.8
作者:
Katharina Steinmann;D. Cooper;L. Kluwe;N. Chuzhanova;C. Senger;E. Serra;C. Lázaro;M. Gilaberte;K. Wimmer;V. Mautner;H. Kehrer
通讯作者: H. Kehrer
DOI: --
发表时间: 1991-12
影响因子: 9.8
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F. Greenberg;Guzzetta;R. MontesdeOca-Luna;Magenis Re;Smith Ac;Richter Sf;I. Kondo;W. Dobyns;P. Patel;Lupski
通讯作者: F. Greenberg;Guzzetta;R. MontesdeOca-Luna;Magenis Re;Smith Ac;Richter Sf;I. Kondo;W. Dobyns;P. Patel;Lupski