在一个多重家族与惠普尔病的IRF4单元不足
Sinem Ünal1,2, Stéphanie Dublanc3, Hailun Li1,2
1Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Inserm U1163, Necker Hospital for Sick Children, Paris, France, EU.
概括
在IRF4基因中罕见的遗传变异可以导致惠普尔病 (WD),即使在受Tropheryma whipplei感染的个体. 这一发现确定IRF4哈普洛缺陷是WD发展的关键因素.
科学领域:
- 遗传学 是一个遗传学.
- 免疫学 免疫学 免疫学
- 传染性疾病 传染性疾病
背景情况:
- 微生物Tropheryma whipplei (T. whipplei) 细菌会导致Whipple病 (WD),但只有很小一部分感染者会患上这种疾病.
- 在T. whipplei感染个体中,WD易感性的遗传基础在很大程度上仍未知.
- 以前的研究表明,IRF4基因变异在WD的大家族中起着作用.
研究的目的:
- 为了研究两个不相关的家庭成员中惠普尔病的遗传原因.
- 描述特定的IRF4基因变异的功能影响.
- 为了确定IRF4哈普洛缺陷是否有助于其他家族的WD.
主要方法:
- 在受影响的母亲和儿子身上进行了全外体测序.
- 生物化学测试特征了已识别的IRF4变体的DNA结合和转录活性.
- 对患者白细胞的免疫学分析评估了免疫功能.
主要成果:
- 这两位患者都是罕见的低形态IRF4误解变体 (p.R25S) 的异构体.
- 这种变异影响了IRF4的DNA结合和转录诱导,但没有表现出负主导性.
- 其他情况下,患者的免疫功能是正常的,支持IRF4脱素不足为原因.
结论:
- 在Tropheryma whipplei感染个体中,IRF4基因的Haploinsufficiency可以引起Whipple病.
- 这种遗传易感性存在于至少两个无关家族.
- 这些发现凸显了遗传因素在决定WD发育中的重要性.
相关概念视频
Pleiotropy
43.1K
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
43.1K
Genomic Imprinting and Inheritance
36.7K
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
36.7K
Restarting Stalled Replication Forks
6.2K
DNA replication is initiated at sites containing predefined DNA sequences known as origins of replication. DNA is unwound at these sites by the minichromosome maintenance (MCM) helicase and other factors such as Cdc45 and the associated GINS complex.The unwound single strands are protected by replication protein A (RPA) until DNA polymerase starts synthesizing DNA at the 5’ end of the strand in the same direction as the replication fork. To prevent the replication fork from falling apart,...
6.2K
Pedigree Analysis
88.7K
Overview
88.7K


